技术领域technical field
本发明涉及输变电工程线路电晕可听噪声测量领域，并且更具体地，涉及一种交流输电线路电晕可听噪声测量方法及系统。The invention relates to the field of corona audible noise measurement of power transmission and transformation engineering lines, and more particularly, relates to a method and system for measuring corona audible noise of AC transmission lines.
背景技术Background technique
在交流高压输电线路工作时，线路因施加的电压使得表面带上电荷，从而导线附近存在电场。当导线表面电场超过气体击穿强度时，表面附近产生局部放电，但并不发生整个空气间隙的击穿，此时在导线表面可以观察到淡淡的发光层，并能听到咝咝的响声，这就是电晕放电现象。电晕效应是伴随着电晕放电过程出现的声、光、热等现象的放电效应。交直流输电工程的电晕效应主要表现为无线电干扰、可听噪声等。When the AC high-voltage transmission line is working, the surface of the line is charged due to the applied voltage, so there is an electric field near the wire. When the electric field on the surface of the wire exceeds the breakdown strength of the gas, partial discharge occurs near the surface, but the breakdown of the entire air gap does not occur. At this time, a faint luminescent layer can be observed on the surface of the wire, and a hissing sound can be heard. This is the corona discharge phenomenon. The corona effect is the discharge effect of sound, light, heat and other phenomena that accompany the corona discharge process. The corona effect of AC and DC transmission projects is mainly manifested as radio interference and audible noise.
交流输电线路电晕放电产生的可听噪声有宽频带噪声和线路工作频率倍频及其整数倍的交流声(又称纯音)两种。宽频带噪声为一种嘶嘶和啪啪的爆裂声响，由导线表面电晕放电产生的杂乱无章的电流脉冲所造成的，特别是在交流电压正半波时，正极性电晕电流脉冲流注阶段最为严重。对于一般交流输电线路来说，引起人们烦恼的主要是宽频带噪声，其次是交流声。在好天气下，由交流输电线路电晕产生的可听噪声并不大；在雨天，导线下方的水珠使电晕放电强度增加，可听噪声会增大，雨天时的可听噪声比晴天时的约大15～20dB(A)。因此，对于交流输电线路，可听噪声的限值重点要考虑雨天情况。The audible noise generated by the corona discharge of the AC transmission line has two types: broadband noise and line operating frequency multiplier and its integer multiple humming sound (also known as pure tone). Broadband noise is a hissing and popping sound, which is caused by the random current pulses generated by the corona discharge on the surface of the wire, especially in the positive half-wave of the AC voltage, the positive polarity of the corona current pulse flow phase most serious. For general AC transmission lines, broadband noise is the main cause of people's annoyance, followed by hum. In good weather, the audible noise generated by the corona of the AC transmission line is not large; in rainy days, the water droplets under the wire increase the intensity of the corona discharge, and the audible noise will increase, and the audible noise in rainy days is higher than that in sunny days When it is about 15 ~ 20dB (A). Therefore, for AC transmission lines, the limit value of audible noise should focus on rainy weather conditions.
为了将输电线路的电晕可听噪声带来的影响降到到合理范围，对于交流输电线路的可听噪声，在超、特高压等级均提出了明确的设计控制限值。在新建高压线路之前，对可听噪声进行预测是必要的设计任务之一。但是，输电线路电晕放电伴随的可听噪声的产生过程十分复杂，随机因素多，分散性大，故很难从理论上推导一种准确预测可听噪声的公式。美国、日本、意大利和加拿大等国家，通过在电晕笼内模拟或在线路上长期实测数据的统计和分析，得到一些结论。因此以试验线段或者实际运行的线路为对象进行测量，是研究输电线路可听噪声的基本手段。In order to reduce the impact of the audible noise of corona on the transmission line to a reasonable range, for the audible noise of the AC transmission line, a clear design control limit has been put forward at the EHV and UHV levels. Prediction of audible noise is one of the necessary design tasks before building new high voltage lines. However, the generation process of audible noise accompanied by corona discharge in transmission lines is very complicated, with many random factors and large dispersion, so it is difficult to theoretically derive a formula for accurately predicting audible noise. The United States, Japan, Italy, Canada and other countries have obtained some conclusions through the simulation in the corona cage or the statistics and analysis of the long-term measured data on the line. Therefore, it is the basic means to study the audible noise of the transmission line by taking the test line section or the actual running line as the object to measure.
但是目前，对应交流输电线路可听噪声而言，降雨带来的背景噪声主要由雨滴打击不同表面造成，在输电线路途径的野外，主要以雨滴打击庄稼、灌木、树丛以及土地表面引起，不能准确的对高压输电线路电晕可听噪声进行测量。But at present, in terms of the audible noise of AC transmission lines, the background noise caused by rainfall is mainly caused by raindrops hitting different surfaces. In the field where the transmission line passes, it is mainly caused by raindrops hitting crops, shrubs, bushes and land surfaces, which cannot be accurately Measurement of corona audible noise on high voltage transmission lines.
发明内容Contents of the invention
本发明提供了一种交流输电线路电晕可听噪声测量方法及系统，以解决降雨带来的背景噪声导致的交流输电线路电晕可听噪声无法准确测量的问题。The invention provides a method and system for measuring audible corona noise of an AC transmission line to solve the problem that the audible corona noise of an AC transmission line cannot be accurately measured due to background noise brought by rainfall.
为了解决上述问题，根据本发明的一个方面，提供了一种交流输电线路电晕可听噪声测量方法，所述方法包括：In order to solve the above problems, according to one aspect of the present invention, a method for measuring audible noise of corona in AC transmission lines is provided, the method comprising:
选取监测点，在监测点预设半径阈值范围内设置雨量监测装置，并根据预设时间间隔阈值记录降雨量数据；Select a monitoring point, install a rainfall monitoring device within the preset radius threshold of the monitoring point, and record rainfall data according to the preset time interval threshold;
选取噪声测量点，利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值；Select the noise measurement point, use the noise sensor to measure the rain noise value under different rainfall conditions under the power outage state of the line, and obtain the rain noise value corresponding to the different rainfall data;
利用非线性拟合方法确定所述降雨量数据和对应的雨噪声值的函数关系；Using a nonlinear fitting method to determine the functional relationship between the rainfall data and the corresponding rain noise value;
根据HJ706-2014《环境噪声监测技术规范噪声测量值修正》原则，利用三次样条插值法确定背景噪声声压级校正曲线，其中所述背景噪声声压级校正曲线的横坐标为噪声差值，纵坐标为噪声差值对应的噪声校正值；According to the principle of HJ706-2014 "Environmental Noise Monitoring Technical Specification Noise Measurement Value Correction", the cubic spline interpolation method is used to determine the background noise sound pressure level correction curve, wherein the abscissa of the background noise sound pressure level correction curve is the noise difference, The ordinate is the noise correction value corresponding to the noise difference;
利用所述函数关系、背景噪声声压级校正曲线对不同降雨量条件下的交流输电线路电晕可听噪声测量值进行校正，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。Using the functional relationship and the background noise sound pressure level correction curve to correct the measured values of the audible noise of the AC transmission line under different rainfall conditions, and obtain the accurate value of the audible noise of the AC transmission line under different rainfall conditions .
优选地，其中所述所述雨量监测装置为：激光天气现象仪。Preferably, the rain monitoring device is: a laser weather phenomenon instrument.
优选地，其中所述选取噪声测量点，利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值，包括：Preferably, the noise measurement point is selected, and the noise sensor is used to measure the rain noise value under different rainfall conditions under the power outage state of the line, and the rain noise value corresponding to different rainfall data is obtained, including:
选取位于两侧塔高基本相同的档距中央且距离交流输电线路外侧导线预设距离阈值处，并且地面比较平坦、周围无障碍物处作为噪声测量点；Select the place located in the center of the span with basically the same tower height on both sides and the preset distance threshold from the outer conductor of the AC transmission line, where the ground is relatively flat and there are no obstacles around it as the noise measurement point;
在噪声传感器上设置防风罩，设置传声器位置，其中，自由场传声器的膜片垂直对准交流线路的中相导线，无规则入射传声器的膜片垂直朝上；Install a windshield on the noise sensor, and set the position of the microphone, wherein the diaphragm of the free-field microphone is vertically aligned with the mid-phase conductor of the AC line, and the diaphragm of the random-incidence microphone is vertically upward;
利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值。The noise sensor is used to measure the rain noise value under different rainfall conditions under the power outage state of the line, and the rain noise value corresponding to different rainfall data is obtained.
优选地，其中所述方法还包括：Preferably, wherein said method further comprises:
在雨噪声测量前后，利用声学校准装置对声级计进行校验；Before and after the rain noise measurement, use the acoustic calibration device to calibrate the sound level meter;
按照预设校验时间间隔阈值对传声器进行校验。The microphone is calibrated according to the preset calibration time interval threshold.
优选地，其中在所述利用非线性拟合方法确定所述降雨量数据和对应的雨噪声值的函数关系之前，包括：Preferably, before the use of the nonlinear fitting method to determine the functional relationship between the rainfall data and the corresponding rain noise value, it includes:
根据所述降雨量数据和对应的雨噪声值之间的关系获取散点图。A scatter diagram is obtained according to the relationship between the rainfall data and the corresponding rain noise value.
优选地，其中所述利用所述函数关系、背景噪声声压级校正曲线对不同降雨量条件下的交流输电线路电晕可听噪声测量值进行校正，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值，包括：Preferably, wherein the measured value of the corona audible noise of the AC transmission line under different rainfall conditions is corrected by using the functional relationship and the background noise sound pressure level correction curve, and the AC transmission line voltage under different rainfall conditions is obtained. Halo Accurate values for audible noise, including:
对不同降雨量条件下的交流输电线路电晕可听噪声进行测量，获取可听噪声测量值；Measure the corona audible noise of AC transmission lines under different rainfall conditions to obtain audible noise measurement values;
将不同降雨量条件下的可听噪声测量值与对应的雨噪声值做差，获取噪声差值；The difference between the audible noise measurement value under different rainfall conditions and the corresponding rain noise value is obtained to obtain the noise difference;
将不同降雨量条件下的可听噪声测量值与所述噪声差值对应的校正值做差，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。The difference between the audible noise measurement value under different rainfall conditions and the correction value corresponding to the noise difference value is made to obtain the accurate value of the audible noise of AC transmission line corona under different rainfall conditions.
优选地，其中所述方法还包括：Preferably, wherein said method further comprises:
对预设监测阈值范围内的环境状况进行记录。Record environmental conditions within preset monitoring thresholds.
优选地，其中所述对预设监测阈值范围内的环境状况进行记录，包括：Preferably, the recording of environmental conditions within the preset monitoring threshold range includes:
对所述预设监测阈值范围为：以监测点为圆心的半径为1km的圆形范围内的环境的植被、地形和建筑物数据进行记录。The preset monitoring threshold range is: the vegetation, terrain and building data of the environment within a circular range with a radius of 1 km centered on the monitoring point are recorded.
根据本发明的另一个方面，提供了一种交流输电线路电晕可听噪声测量系统，所述系统包括：According to another aspect of the present invention, there is provided a system for measuring audible noise of corona in AC transmission lines, the system comprising:
降雨量数据监测单元，用于选取监测点，在监测点预设半径阈值范围内设置雨量监测装置，并根据预设时间间隔阈值记录降雨量数据；The rainfall data monitoring unit is used to select a monitoring point, install a rainfall monitoring device within a preset radius threshold of the monitoring point, and record rainfall data according to a preset time interval threshold;
雨噪声值获取单元，用于选取噪声测量点，利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值；The rain noise value acquisition unit is used to select noise measurement points, use the noise sensor to measure the rain noise value under different rainfall conditions under the power outage state of the line, and obtain the rain noise value corresponding to the different rainfall data;
函数关系确定单元，用于利用非线性拟合方法确定所述降雨量数据和对应的雨噪声值的函数关系；A functional relationship determining unit, configured to determine the functional relationship between the rainfall data and the corresponding rain noise value by using a nonlinear fitting method;
校正曲线确定单元，用于根据HJ706-2014《环境噪声监测技术规范噪声测量值修正》原则，利用三次样条插值法确定背景噪声声压级校正曲线，其中所述背景噪声声压级校正曲线的横坐标为噪声差值，纵坐标为噪声差值对应的噪声校正值；The correction curve determination unit is used to determine the background noise sound pressure level correction curve by using the cubic spline interpolation method according to the principle of HJ706-2014 "Environmental Noise Monitoring Technical Specification Noise Measurement Value Correction", wherein the background noise sound pressure level correction curve The abscissa is the noise difference, and the ordinate is the noise correction value corresponding to the noise difference;
可听噪声准确值确定单元，用于利用所述函数关系、背景噪声声压级校正曲线对不同降雨量条件下的交流输电线路电晕可听噪声测量值进行校正，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。Accurate value determination unit for audible noise, used to correct the corona audible noise measurement value of AC transmission line under different rainfall conditions by using the functional relationship and the background noise sound pressure level correction curve to obtain the audible noise value under different rainfall conditions Accurate values for audible noise of corona on AC transmission lines.
优选地，其中所述所述雨量监测装置为：激光天气现象仪。Preferably, the rain monitoring device is: a laser weather phenomenon instrument.
优选地，其中所述雨噪声值获取单元，用于选取噪声测量点，利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值，包括：Preferably, the rain noise value acquisition unit is configured to select a noise measurement point, use a noise sensor to measure rain noise values under different rainfall conditions under a power failure state, and obtain rain noise values corresponding to different rainfall data ,include:
选取位于两侧塔高基本相同的档距中央且距离交流输电线路外侧导线预设距离阈值处，并且地面比较平坦、周围无障碍物处作为噪声测量点；Select the place located in the center of the span with basically the same tower height on both sides and the preset distance threshold from the outer conductor of the AC transmission line, where the ground is relatively flat and there are no obstacles around it as the noise measurement point;
在噪声传感器上设置防风罩，设置传声器位置，其中，自由场传声器的膜片垂直对准交流线路的中相导线，无规则入射传声器的膜片垂直朝上；Install a windshield on the noise sensor, and set the position of the microphone, wherein the diaphragm of the free-field microphone is vertically aligned with the mid-phase conductor of the AC line, and the diaphragm of the random-incidence microphone is vertically upward;
利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值。The noise sensor is used to measure the rain noise value under different rainfall conditions under the power outage state of the line, and the rain noise value corresponding to different rainfall data is obtained.
优选地，其中所述系统还包括：Preferably, wherein said system also includes:
声级计校验单元，用于在雨噪声测量前后，利用声学校准装置对声级计进行校验；The sound level meter calibration unit is used for calibrating the sound level meter by using the acoustic calibration device before and after the rain noise measurement;
传声器校验单元，用于按照预设校验时间间隔阈值对传声器进行校验。The microphone verification unit is configured to verify the microphone according to the preset verification time interval threshold.
优选地，其中所述函数关系确定单元，还用于：Preferably, the functional relationship determining unit is further used for:
根据所述降雨量数据和对应的雨噪声值之间的关系获取散点图。A scatter diagram is obtained according to the relationship between the rainfall data and the corresponding rain noise value.
优选地，其中所述可听噪声准确值确定单元，具体用于：Preferably, the audible noise accuracy value determining unit is specifically used for:
对不同降雨量条件下的交流输电线路电晕可听噪声进行测量，获取可听噪声测量值；Measure the corona audible noise of AC transmission lines under different rainfall conditions to obtain audible noise measurement values;
将不同降雨量条件下的可听噪声测量值与对应的雨噪声值做差，获取噪声差值；The difference between the audible noise measurement value under different rainfall conditions and the corresponding rain noise value is obtained to obtain the noise difference;
将不同降雨量条件下的可听噪声测量值与所述噪声差值对应的校正值做差，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。The difference between the audible noise measurement value under different rainfall conditions and the correction value corresponding to the noise difference value is made to obtain the accurate value of the audible noise of AC transmission line corona under different rainfall conditions.
优选地，其中所述系统还包括：Preferably, wherein said system also includes:
环境状况记录单元，用于对预设监测阈值范围内的环境状况进行记录。The environmental condition recording unit is used to record the environmental condition within the preset monitoring threshold range.
优选地，其中所述环境状况记录单元，对预设监测阈值范围内的环境状况进行记录，包括：Preferably, the environmental condition recording unit records the environmental conditions within the preset monitoring threshold range, including:
对所述预设监测阈值范围为：以监测点为圆心的半径为1km的圆形范围内的环境的植被、地形和建筑物数据进行记录。The preset monitoring threshold range is: the vegetation, terrain and building data of the environment within a circular range with a radius of 1 km centered on the monitoring point are recorded.
本发明提供了一种交流输电线路电晕可听噪声测量方法及系统，对监测点的降雨量以及噪声测量点的雨噪声数据进行测量，并利用非线性拟合方法确定所述降雨量数据和对应的雨噪声值的函数关系；根据HJ706-2014《环境噪声监测技术规范噪声测量值修正》原则，利用三次样条插值法确定背景噪声声压级校正曲线；利用所述函数关系、背景噪声声压级校正曲线对不同降雨量条件下的交流输电线路电晕可听噪声测量值进行校正，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。本发明的方法能够在进行交流输电线路电晕可听噪声实测研究时获得纯净的电晕放电带来的可听噪声，为交流输电线路电晕可听噪声实测研究提供了准确数据，保证了交流输电线路电晕可听噪声研究的准确性。The invention provides a method and system for measuring the audible noise of corona in AC transmission lines, which measures the rainfall at the monitoring point and the rain noise data at the noise measurement point, and determines the rainfall data and The functional relationship of the corresponding rain noise value; according to the principle of HJ706-2014 "Environmental Noise Monitoring Technical Specification Noise Measurement Value Correction", the cubic spline interpolation method is used to determine the background noise sound pressure level correction curve; The voltage level calibration curve corrects the measured values of the audible noise of the AC transmission line under different rainfall conditions, and obtains the accurate value of the audible noise of the AC transmission line under different rainfall conditions. The method of the present invention can obtain the audible noise brought by pure corona discharge during the actual measurement and research of the corona audible noise of the AC transmission line, provides accurate data for the actual measurement research of the audible noise of the corona of the AC transmission line, and guarantees the audible noise of the AC transmission line. Accuracy of transmission line corona audible noise studies.
附图说明Description of drawings
通过参考下面的附图，可以更为完整地理解本发明的示例性实施方式：A more complete understanding of the exemplary embodiments of the present invention can be had by referring to the following drawings:
图1为根据本发明实施方式的交流输电线路电晕可听噪声测量方法100的流程图；1 is a flowchart of a method 100 for measuring audible noise of AC transmission line corona according to an embodiment of the present invention;
图2为根据本发明实施方式的监测点环境的实例图；2 is an example diagram of a monitoring point environment according to an embodiment of the present invention;
图3为根据本发明实施方式的雨量监测装置的实例图；3 is an example diagram of a rainfall monitoring device according to an embodiment of the present invention;
图4为根据本发明实施方式的雨量记录收集界面的实例图；4 is an example diagram of a rainfall record collection interface according to an embodiment of the present invention;
图5为根据本发明实施方式的校正曲线图；Fig. 5 is a calibration curve diagram according to an embodiment of the present invention;
图6为根据本发明实施方式的全年可听噪声实测值与降雨量的关系示意图；6 is a schematic diagram of the relationship between the measured value of audible noise and rainfall throughout the year according to an embodiment of the present invention;
图7为根据本发明实施方式的全年可听噪声准确值与降雨量的关系图；以及Fig. 7 is the relationship figure of annual audible noise accurate value and rainfall according to the embodiment of the present invention; And
图8为根据本发明实施方式的交流输电线路电晕可听噪声测量系统800的结构示意图。Fig. 8 is a schematic structural diagram of a system 800 for measuring audible noise of AC transmission line corona according to an embodiment of the present invention.
具体实施方式Detailed ways
现在参考附图介绍本发明的示例性实施方式，然而，本发明可以用许多不同的形式来实施，并且不局限于此处描述的实施例，提供这些实施例是为了详尽地且完全地公开本发明，并且向所属技术领域的技术人员充分传达本发明的范围。对于表示在附图中的示例性实施方式中的术语并不是对本发明的限定。在附图中，相同的单元/元件使用相同的附图标记。Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units/elements are given the same reference numerals.
除非另有说明，此处使用的术语(包括科技术语)对所属技术领域的技术人员具有通常的理解含义。另外，可以理解的是，以通常使用的词典限定的术语，应当被理解为与其相关领域的语境具有一致的含义，而不应该被理解为理想化的或过于正式的意义。Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or overly formal meanings.
图1为根据本发明实施方式的交流输电线路电晕可听噪声测量方法100的流程图。如图1所示，本发明实施方式的交流输电线路电晕可听噪声测量方法对监测点的降雨量以及噪声测量点的雨噪声数据进行测量，并利用非线性拟合方法确定所述降雨量数据和对应的雨噪声值的函数关系；根据HJ706-2014《环境噪声监测技术规范噪声测量值修正》原则，利用三次样条插值法确定背景噪声声压级校正曲线；利用所述函数关系、背景噪声声压级校正曲线对不同降雨量条件下的交流输电线路电晕可听噪声测量值进行校正，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。本发明的方法能够在进行交流输电线路电晕可听噪声实测研究时获得纯净的电晕放电带来的可听噪声，为交流输电线路电晕可听噪声实测研究提供了准确数据，保证了交流输电线路电晕可听噪声研究的准确性。本发明实施方式的交流输电线路电晕可听噪声测量方法100从步骤101处开始，在步骤101选取监测点，在监测点预设半径阈值范围内设置雨量监测装置，并根据预设时间间隔阈值记录降雨量数据。Fig. 1 is a flow chart of a method 100 for measuring audible noise of corona on an AC transmission line according to an embodiment of the present invention. As shown in Figure 1, the method for measuring the audible noise of AC transmission line corona in the embodiment of the present invention measures the rainfall at the monitoring point and the rain noise data at the noise measurement point, and determines the rainfall by using a nonlinear fitting method The functional relationship between the data and the corresponding rain noise value; according to the principle of HJ706-2014 "Environmental Noise Monitoring Technical Specification Noise Measurement Value Correction", the cubic spline interpolation method is used to determine the background noise sound pressure level correction curve; using the functional relationship, background The noise sound pressure level calibration curve corrects the measured values of the audible noise of the AC transmission line under different rainfall conditions, and obtains the accurate value of the audible noise of the AC transmission line under different rainfall conditions. The method of the present invention can obtain the audible noise brought by pure corona discharge during the actual measurement and research of the corona audible noise of the AC transmission line, provides accurate data for the actual measurement research of the audible noise of the corona of the AC transmission line, and guarantees the audible noise of the AC transmission line. Accuracy of transmission line corona audible noise studies. The method 100 for measuring audible noise of AC transmission line corona in the embodiment of the present invention starts from step 101, selects a monitoring point in step 101, and installs a rainfall monitoring device within the preset radius threshold range of the monitoring point, and according to the preset time interval threshold Record rainfall data.
优选地，其中所述所述雨量监测装置为：激光天气现象仪。Preferably, the rain monitoring device is: a laser weather phenomenon instrument.
在本发明的实施方式中，首先记录监测点周边环境，包括：记录监测点为圆心1km为半径的圆内环境的植被、地形、建筑物等情况，以下表1是几种高压交流输电线路在野外路径中的主要环境描述的例子。不限于表1所描述的环境，具体根据不同研究监测点而记录。In an embodiment of the present invention, at first record the surrounding environment of the monitoring point, including: record the monitoring point as the vegetation, terrain, buildings, etc. of the environment in a circle with a radius of 1 km from the center of the circle. Examples of primary environment descriptions in wilderness paths. It is not limited to the environment described in Table 1, and is recorded according to different research monitoring points.
表1高压交流输电线路在野外路径中的主要环境描述Table 1 Description of the main environment of high-voltage AC transmission lines in the field path
在监测点周围5m～15m内建立一个雨量测量装置，该系装置与监测点所处环境一致，周围无遮挡。为了准确考虑，雨量测量装置应采用较为准确的激光天气现象仪。天气现象仪置于地面3m高。天气现象仪是基于降水粒子对激光衰减原理，精确测量降水(液态、固态、混合)粒子直径、速度、分布密度、雨强、累积雨量、天气现象、能见度等气象参数的集雨滴谱分析仪、高精度全天候雨量计、天气现象识别仪和能见度仪等功能于一体的高性能气象传感器。结合记录软件可以以较小的时间间隔记录雨量的变化。Set up a rainfall measuring device within 5m ~ 15m around the monitoring point, which is consistent with the environment of the monitoring point, and there is no shelter around it. For accurate consideration, the rainfall measuring device should adopt a relatively accurate laser weather phenomenon instrument. The weather phenomenon instrument is placed on the ground at a height of 3m. The weather phenomenon instrument is based on the principle of laser attenuation of precipitation particles to accurately measure the diameter, velocity, distribution density, rain intensity, cumulative rainfall, weather phenomena, visibility and other meteorological parameters of precipitation (liquid, solid, mixed) particles. It is a high-performance meteorological sensor integrating high-precision all-weather rain gauge, weather phenomenon recognition instrument and visibility meter. Combined with recording software, changes in rainfall can be recorded at smaller time intervals.
优选地，在步骤102选取噪声测量点，利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值。Preferably, in step 102, a noise measurement point is selected, and the noise sensor is used to measure the rain noise value under different rainfall conditions under the power outage state of the line, so as to obtain the rain noise value corresponding to different rainfall data.
优选地，其中所述选取噪声测量点，利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值，包括：Preferably, the noise measurement point is selected, and the noise sensor is used to measure the rain noise value under different rainfall conditions under the power outage state of the line, and the rain noise value corresponding to different rainfall data is obtained, including:
选取位于两侧塔高基本相同的档距中央且距离交流输电线路外侧导线预设距离阈值处，并且地面比较平坦、周围无障碍物处作为噪声测量点；Select the place located in the center of the span with basically the same tower height on both sides and the preset distance threshold from the outer conductor of the AC transmission line, where the ground is relatively flat and there are no obstacles around it as the noise measurement point;
在噪声传感器上设置防风罩，设置传声器位置，其中，自由场传声器的膜片垂直对准交流线路的中相导线，无规则入射传声器的膜片垂直朝上；Install a windshield on the noise sensor, and set the position of the microphone, wherein the diaphragm of the free-field microphone is vertically aligned with the mid-phase conductor of the AC line, and the diaphragm of the random-incidence microphone is vertically upward;
利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值。The noise sensor is used to measure the rain noise value under different rainfall conditions under the power outage state of the line, and the rain noise value corresponding to different rainfall data is obtained.
优选地，其中所述方法还包括：Preferably, wherein said method further comprises:
在雨噪声测量前后，利用声学校准装置对声级计进行校验；Before and after the rain noise measurement, use the acoustic calibration device to calibrate the sound level meter;
按照预设校验时间间隔阈值对传声器进行校验。The microphone is calibrated according to the preset calibration time interval threshold.
在本发明的实施方式中，为了采集降雨条件下的雨噪声，噪声传感器加置防风罩；自由场传声器的膜片应垂直对准交流线路的中相导线，无规则入射传声器的膜片垂直朝上。测量点位于两侧塔高基本相同的档距中央且距交流线路外侧导线20m，测点应是地面比较平坦、周围无障碍物而使线路所发射的声波进入某反射面上的一个自由场；噪声探头距离地面1.5m高。在线路停电状况下，选取不同雨量条件下对雨噪声进行连续监测；测量的前后，均用声学校准装置对声级计进行校验；每一个月对测量系统的频率响应及内部噪声水平进行一次检定，每三个月对传声器进行一次校验。In an embodiment of the present invention, in order to collect the rain noise under the rainfall condition, the noise sensor is equipped with a windshield; the diaphragm of the free-field microphone should be vertically aligned with the middle-phase conductor of the AC circuit, and the diaphragm of the random incident microphone is vertically directed towards superior. The measuring point is located in the center of the span where the height of the towers on both sides is basically the same and 20m away from the outer conductor of the AC line. The measuring point should be a free field where the ground is relatively flat and there are no obstacles around so that the sound waves emitted by the line enter a certain reflecting surface; The noise probe is 1.5m above the ground. Under the condition of line power failure, the rain noise is continuously monitored under different rainfall conditions; before and after the measurement, the sound level meter is calibrated with the acoustic calibration device; the frequency response of the measurement system and the internal noise level are checked every month. Once a test is performed, the microphone is calibrated every three months.
优选地，在步骤103利用非线性拟合方法确定所述降雨量数据和对应的雨噪声值的函数关系。Preferably, in step 103, a nonlinear fitting method is used to determine the functional relationship between the rainfall data and the corresponding rain noise value.
优选地，其中在所述利用非线性拟合方法确定所述降雨量数据和对应的雨噪声值的函数关系之前，包括：Preferably, before the use of the nonlinear fitting method to determine the functional relationship between the rainfall data and the corresponding rain noise value, it includes:
根据所述降雨量数据和对应的雨噪声值之间的关系获取散点图。A scatter diagram is obtained according to the relationship between the rainfall data and the corresponding rain noise value.
优选地，在步骤104根据HJ706-2014《环境噪声监测技术规范噪声测量值修正》原则，利用三次样条插值法确定背景噪声声压级校正曲线，其中所述背景噪声声压级校正曲线的横坐标为噪声差值，纵坐标为噪声差值对应的噪声校正值。Preferably, in step 104, according to the principle of HJ706-2014 "Environmental Noise Monitoring Technical Specification Noise Measurement Value Correction", the cubic spline interpolation method is used to determine the background noise sound pressure level correction curve, wherein the horizontal of the background noise sound pressure level correction curve The coordinates are the noise difference, and the ordinate is the noise correction value corresponding to the noise difference.
我国国家环境保护标准HJ 706-2014《环境噪声监测技术规范噪声测量值修正》规定了适用于监测与评价环境噪声时对噪声测量值的修正方法，具体为：对于噪声测量值与背景噪声值的差值ΔL1大于10dB时，噪声测量值不做修正；噪声测量值与背景噪声值的差值ΔL1在3dB～10dB之间时，按表2进行修正(噪声排放值＝噪声测量值+修正值)。my country's national environmental protection standard HJ 706-2014 "Environmental Noise Monitoring Technical Specifications Noise Measurement Value Correction" stipulates the correction method for noise measurement values when monitoring and evaluating environmental noise, specifically: for noise measurement values and background noise values When the difference ΔL1 is greater than 10dB, the noise measurement value will not be corrected; when the difference ΔL1 between the noise measurement value and the background noise value is between 3dB and 10dB, it will be corrected according to Table 2 (noise emission value = noise measurement value + correction value) .
表2 3dB<ΔL1<10dB时噪声测量值修正表Table 2 Correction table of noise measurement value when 3dB<ΔL1<10dB
优选地，在步骤105利用所述函数关系、背景噪声声压级校正曲线对不同降雨量条件下的交流输电线路电晕可听噪声测量值进行校正，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。Preferably, in step 105, the measured value of the corona audible noise of the AC transmission line under different rainfall conditions is corrected by using the functional relationship and the background noise sound pressure level correction curve to obtain the AC transmission line voltage under different rainfall conditions. Halo Accurate value of audible noise.
优选地，其中所述利用所述函数关系、背景噪声声压级校正曲线对不同降雨量条件下的交流输电线路电晕可听噪声测量值进行校正，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值，包括：Preferably, wherein the measured value of the corona audible noise of the AC transmission line under different rainfall conditions is corrected by using the functional relationship and the background noise sound pressure level correction curve, and the AC transmission line voltage under different rainfall conditions is obtained. Halo Accurate values for audible noise, including:
对不同降雨量条件下的交流输电线路电晕可听噪声进行测量，获取可听噪声测量值；Measure the corona audible noise of AC transmission lines under different rainfall conditions to obtain audible noise measurement values;
将不同降雨量条件下的可听噪声测量值与对应的雨噪声值做差，获取噪声差值；The difference between the audible noise measurement value under different rainfall conditions and the corresponding rain noise value is obtained to obtain the noise difference;
将不同降雨量条件下的可听噪声测量值与所述噪声差值对应的校正值做差，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。The difference between the audible noise measurement value under different rainfall conditions and the correction value corresponding to the noise difference value is made to obtain the accurate value of the audible noise of AC transmission line corona under different rainfall conditions.
以下具体举例说明本发明的实施方式The following concrete examples illustrate the embodiment of the present invention
以某特高压交流同塔双回输电线路附近监测点降雨条件下背景噪声(雨噪声)为例：Take the background noise (rain noise) under rainfall conditions at a monitoring point near a UHV AC double-circuit transmission line as an example:
图2为根据本发明实施方式的监测点环境的实例图。如图2所示，记录监测点周边环境，此测点周围地面覆盖物为细叶或庄稼，如干草、谷物等，15～30m处有少量的小、树叶茂密的树木；30～90m处有少量的树木，现场如图1，处于表1中R2与R3之间。FIG. 2 is an example diagram of a monitoring point environment according to an embodiment of the present invention. As shown in Figure 2, record the surrounding environment of the monitoring point. The ground cover around the measuring point is fine leaves or crops, such as hay, grain, etc. There are a small number of small and densely leafy trees at 15-30m; A small number of trees, as shown in Figure 1, are between R2 and R3 in Table 1.
图3为根据本发明实施方式的雨量监测装置的实例图。如图3所示，采用国外某款功能强大、稳定性好的天气现象仪作为雨量监测设备，设备位于测点外10m处，置于地面3m高处。图4为根据本发明实施方式的雨量记录收集界面的实例图。包括：时间以及对应的雨量数据。Fig. 3 is an example diagram of a rainfall monitoring device according to an embodiment of the present invention. As shown in Figure 3, a powerful and stable foreign weather phenomenon instrument is used as the rainfall monitoring equipment. The equipment is located 10m away from the measuring point and placed at a height of 3m above the ground. Fig. 4 is an example diagram of a rainfall record collection interface according to an embodiment of the present invention. Including: time and corresponding rainfall data.
在对雨噪声进行测量时，采用某国外噪声测量仪，噪声传感器加置防风罩；传声器的膜片应垂直对准交流线路的中相导线，测量点位于两侧塔高基本相同的档距中央且距交流线路外侧导线20m，噪声探头距离地面1.5m高。分别选取不同雨量条件下对雨噪声进行连续监测；测量的前后，均用声学校准装置对声级计进行校验；每一个月对测量系统的频率响应及内部噪声水平进行一次检定，每三个月对传声器进行一次校验。When measuring rain noise, a certain foreign noise measuring instrument is used, and the noise sensor is equipped with a windshield; the diaphragm of the microphone should be vertically aligned with the middle phase conductor of the AC line, and the measurement point is located in the center of the span where the tower heights on both sides are basically the same. And it is 20m away from the outer conductor of the AC line, and the noise probe is 1.5m away from the ground. Continuously monitor the rain noise under different rainfall conditions; before and after the measurement, use the acoustic calibration device to calibrate the sound level meter; check the frequency response and internal noise level of the measurement system once a month, and every three months Calibrate the microphone once a month.
获取了雨量数据和对应的雨噪声数据后，将雨量与雨噪声之间的关系采用散点图方式绘制在同一坐标系内，并采用非线性拟合方法对雨量与雨噪声之间的关系进行拟合，得到雨量与雨噪声之间的函数表达式。对2015年2月至9月多个降雨条件下的背景噪声(雨噪声)之间的关系拟合得到函数关系如下式：After obtaining the rainfall data and the corresponding rain noise data, the relationship between rainfall and rain noise is drawn in the same coordinate system in the form of a scatter diagram, and the relationship between rainfall and rain noise is analyzed using a nonlinear fitting method. Fitting to obtain the functional expression between rainfall and rain noise. The relationship between the background noise (rain noise) under multiple rainfall conditions from February to September 2015 was fitted to obtain a functional relationship as follows:
ANrain＝43+10×lg(R)，ANrain=43+10×lg(R),
其中，ANrain为不同降雨量下的雨噪声值，单位为dB(A)；R为降雨量值，单位为mm/h。Among them, ANrain is the rain noise value under different rainfall, the unit is dB(A); R is the rainfall value, the unit is mm/h.
根据HJ 706-2014《环境噪声监测技术规范噪声测量值修正》的背景修正原则，采用三次样条插值方法，制定背景噪声声压级校正曲线，通过对表2数据进行三次样条插值，确定背景噪声声压级校正曲线。图5为根据本发明实施方式的校正曲线图。如图5所示，横坐标为噪声差值，即合成声压级和背景声压级的差值，单位为：dB；纵坐标为噪声差值对应的噪声校正值，即从合成声压中减去的值，单位为：dB。According to the background correction principle of HJ 706-2014 "Environmental Noise Monitoring Technical Specification Noise Measurement Value Correction", the cubic spline interpolation method is used to formulate the background noise sound pressure level correction curve, and the background noise is determined by cubic spline interpolation on the data in Table 2. Noise sound pressure level calibration curve. FIG. 5 is a calibration graph according to an embodiment of the present invention. As shown in Figure 5, the abscissa is the noise difference, that is, the difference between the synthetic sound pressure level and the background sound pressure level, in dB; the ordinate is the noise correction value corresponding to the noise difference, that is, the noise correction value from the synthetic sound pressure Subtracted value, unit: dB.
最后，利用所述函数关系、背景噪声声压级校正曲线对不同降雨量条件下的交流输电线路电晕可听噪声测量值进行校正，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。首先，对不同降雨量条件下的交流输电线路电晕可听噪声进行测量，获取可听噪声测量值；然后，将不同降雨量条件下的可听噪声测量值与对应的雨噪声值做差，获取噪声差值；最后，将不同降雨量条件下的可听噪声测量值与所述噪声差值对应的校正值做差，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。图6为根据本发明实施方式的全年可听噪声实测值与降雨量的关系示意图。如图6所示，横坐标为降雨量，纵坐标为可听噪声实测值，“.”表示的为夏季和秋季；另一个表示冬季和春季。图7为根据本发明实施方式的全年可听噪声准确值与降雨量的关系图。如图7所示，横坐标为降雨量，纵坐标为可听噪声准确值，中间曲线表示拟合曲线。Finally, the measured value of the audible noise of the AC transmission line under different rainfall conditions is corrected by using the functional relationship and the background noise sound pressure level correction curve to obtain the audible noise of the AC transmission line under different rainfall conditions exact value. Firstly, the corona audible noise of the AC transmission line under different rainfall conditions is measured to obtain the audible noise measurement value; then, the audible noise measurement value under different rainfall conditions is compared with the corresponding rain noise value, Acquiring the noise difference; finally, making a difference between the measured audible noise value under different rainfall conditions and the correction value corresponding to the noise difference, to obtain the accurate value of the audible noise of AC transmission line corona under different rainfall conditions. Fig. 6 is a schematic diagram of the relationship between the annual measured value of audible noise and rainfall according to an embodiment of the present invention. As shown in Figure 6, the abscissa is rainfall, and the ordinate is the measured value of audible noise. "." indicates summer and autumn; the other indicates winter and spring. FIG. 7 is a graph showing the relationship between the exact value of audible noise and rainfall throughout the year according to an embodiment of the present invention. As shown in Figure 7, the abscissa is rainfall, the ordinate is the exact value of audible noise, and the middle curve represents the fitting curve.
图8为根据本发明实施方式的交流输电线路电晕可听噪声测量系统800的结构示意图。如图8所示，本发明实施方式的交流输电线路电晕可听噪声测量系统800包括：降雨量数据监测单元801、雨噪声值获取单元802、函数关系确定单元803、校正曲线确定单元804和可听噪声准确值确定单元805。Fig. 8 is a schematic structural diagram of a system 800 for measuring audible noise of AC transmission line corona according to an embodiment of the present invention. As shown in Figure 8, the corona audible noise measurement system 800 of the AC transmission line according to the embodiment of the present invention includes: a rainfall data monitoring unit 801, a rain noise value acquisition unit 802, a functional relationship determination unit 803, a calibration curve determination unit 804 and Accurate value determination unit 805 of audible noise.
优选地，在降雨量数据监测单元801，选取监测点，在监测点预设半径阈值范围内设置雨量监测装置，并根据预设时间间隔阈值记录降雨量数据。优选地，其中所述所述雨量监测装置为：激光天气现象仪。Preferably, in the rainfall data monitoring unit 801, a monitoring point is selected, a rainfall monitoring device is installed within a preset radius threshold of the monitoring point, and rainfall data is recorded according to a preset time interval threshold. Preferably, the rain monitoring device is: a laser weather phenomenon instrument.
优选地，在雨噪声值获取单元802，选取噪声测量点，利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值。Preferably, in the rain noise value acquisition unit 802, a noise measurement point is selected, and the noise sensor is used to measure the rain noise value under different rainfall conditions under the power outage state of the line, and the rain noise value corresponding to different rainfall data is obtained.
优选地，其中所述雨噪声值获取单元，用于选取噪声测量点，利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值，包括：Preferably, the rain noise value acquisition unit is configured to select a noise measurement point, use a noise sensor to measure rain noise values under different rainfall conditions under a power failure state, and obtain rain noise values corresponding to different rainfall data ,include:
选取位于两侧塔高基本相同的档距中央且距离交流输电线路外侧导线预设距离阈值处，并且地面比较平坦、周围无障碍物处作为噪声测量点；Select the place located in the center of the span with basically the same tower height on both sides and the preset distance threshold from the outer conductor of the AC transmission line, where the ground is relatively flat and there are no obstacles around it as the noise measurement point;
在噪声传感器上设置防风罩，设置传声器位置，其中，自由场传声器的膜片垂直对准交流线路的中相导线，无规则入射传声器的膜片垂直朝上；Install a windshield on the noise sensor, and set the position of the microphone, wherein the diaphragm of the free-field microphone is vertically aligned with the mid-phase conductor of the AC line, and the diaphragm of the random-incidence microphone is vertically upward;
利用噪声传感器在线路停电状态下对不同降雨量条件下的雨噪声值进行测量，获取不同降雨量数据对应的雨噪声值。The noise sensor is used to measure the rain noise value under different rainfall conditions under the power outage state of the line, and the rain noise value corresponding to different rainfall data is obtained.
优选地，其中所述系统还包括：Preferably, wherein said system also includes:
声级计校验单元，用于在雨噪声测量前后，利用声学校准装置对声级计进行校验；The sound level meter calibration unit is used for calibrating the sound level meter by using the acoustic calibration device before and after the rain noise measurement;
传声器校验单元，用于按照预设校验时间间隔阈值对传声器进行校验。The microphone verification unit is configured to verify the microphone according to the preset verification time interval threshold.
优选地，在函数关系确定单元803，利用非线性拟合方法确定所述降雨量数据和对应的雨噪声值的函数关系。优选地，其中所述函数关系确定单元，还用于：Preferably, in the functional relationship determining unit 803, a nonlinear fitting method is used to determine the functional relationship between the rainfall data and the corresponding rain noise value. Preferably, the functional relationship determining unit is further used for:
根据所述降雨量数据和对应的雨噪声值之间的关系获取散点图。A scatter diagram is obtained according to the relationship between the rainfall data and the corresponding rain noise value.
优选地，在校正曲线确定单元804，根据HJ706-2014《环境噪声监测技术规范噪声测量值修正》原则，利用三次样条插值法确定背景噪声声压级校正曲线，其中所述背景噪声声压级校正曲线的横坐标为噪声差值，纵坐标为噪声差值对应的噪声校正值。Preferably, in the correction curve determination unit 804, according to the principle of HJ706-2014 "Environmental Noise Monitoring Technical Specification Noise Measurement Value Correction", the cubic spline interpolation method is used to determine the background noise sound pressure level correction curve, wherein the background noise sound pressure level The abscissa of the calibration curve is the noise difference, and the ordinate is the noise correction value corresponding to the noise difference.
优选地，在可听噪声准确值确定单元805，利用所述函数关系、背景噪声声压级校正曲线对不同降雨量条件下的交流输电线路电晕可听噪声测量值进行校正，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。Preferably, in the audible noise accurate value determining unit 805, the corona audible noise measurement value of the AC transmission line under different rainfall conditions is corrected by using the functional relationship and the background noise sound pressure level correction curve to obtain different rainfall Accurate value of audible noise of AC transmission line corona under conditions.
优选地，其中所述可听噪声准确值确定单元，具体用于：Preferably, the audible noise accuracy value determining unit is specifically used for:
对不同降雨量条件下的交流输电线路电晕可听噪声进行测量，获取可听噪声测量值；Measure the corona audible noise of AC transmission lines under different rainfall conditions to obtain audible noise measurement values;
将不同降雨量条件下的可听噪声测量值与对应的雨噪声值做差，获取噪声差值；The difference between the audible noise measurement value under different rainfall conditions and the corresponding rain noise value is obtained to obtain the noise difference;
将不同降雨量条件下的可听噪声测量值与所述噪声差值对应的校正值做差，获取不同降雨量条件下的交流输电线路电晕可听噪声准确值。The difference between the audible noise measurement value under different rainfall conditions and the correction value corresponding to the noise difference value is made to obtain the accurate value of the audible noise of AC transmission line corona under different rainfall conditions.
优选地，其中所述系统还包括：Preferably, wherein said system also includes:
环境状况记录单元，用于对预设监测阈值范围内的环境状况进行记录。The environmental condition recording unit is used to record the environmental condition within the preset monitoring threshold range.
优选地，其中所述环境状况记录单元，对预设监测阈值范围内的环境状况进行记录，包括：Preferably, the environmental condition recording unit records the environmental conditions within the preset monitoring threshold range, including:
对所述预设监测阈值范围为：以监测点为圆心的半径为1km的圆形范围内的环境的植被、地形和建筑物数据进行记录。The preset monitoring threshold range is: the vegetation, terrain and building data of the environment within a circular range with a radius of 1 km centered on the monitoring point are recorded.
本发明的实施例的交流输电线路电晕可听噪声测量系统800与本发明的另一个实施例的交流输电线路电晕可听噪声测量方法100相对应，在此不再赘述。The system 800 for measuring audible corona noise of an AC transmission line according to the embodiment of the present invention corresponds to the method 100 for measuring the audible corona noise of an AC transmission line according to another embodiment of the present invention, and will not be repeated here.
已经通过参考少量实施方式描述了本发明。然而，本领域技术人员所公知的，正如附带的专利权利要求所限定的，除了本发明以上公开的其他的实施例等同地落在本发明的范围内。The invention has been described with reference to a small number of embodiments. However, it is clear to a person skilled in the art that other embodiments than the invention disclosed above are equally within the scope of the invention, as defined by the appended patent claims.
通常地，在权利要求中使用的所有术语都根据他们在技术领域的通常含义被解释，除非在其中被另外明确地定义。所有的参考“一个/所述/该[装置、组件等]”都被开放地解释为所述装置、组件等中的至少一个实例，除非另外明确地说明。这里公开的任何方法的步骤都没必要以公开的准确的顺序运行，除非明确地说明。Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a/the/the [means, component, etc.]" are openly construed to mean at least one instance of said means, component, etc., unless expressly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
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| CN201710899915.4ACN107831411A (en) | 2017-09-28 | 2017-09-28 | A kind of transmission line of alternation current corona audible noise measuring method and system |
| Application Number | Priority Date | Filing Date | Title |
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| CN201710899915.4ACN107831411A (en) | 2017-09-28 | 2017-09-28 | A kind of transmission line of alternation current corona audible noise measuring method and system |
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| CN107831411Atrue CN107831411A (en) | 2018-03-23 |
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| CN201710899915.4APendingCN107831411A (en) | 2017-09-28 | 2017-09-28 | A kind of transmission line of alternation current corona audible noise measuring method and system |
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