技术领域Technical field
本发明涉及变压器电力分析领域，特别涉及一种配电变压器状态判别方法、系统、装置及计算机可读存储介质。The invention relates to the field of transformer power analysis, and in particular to a distribution transformer status identification method, system, device and computer-readable storage medium.
背景技术Background technique
配电变压器的运行状态是电力供应商最为关注的重要问题之一。The operating status of distribution transformers is one of the most important issues that power suppliers are concerned about.
统计表明，很大一部分配电变压器故障与变压器带电部分有关，特别是内部绕组与分接头短路故障。而内部故障通常具有一定的发展过程，电网运行人员难以从外部及时发现并进行处理。Statistics show that a large proportion of distribution transformer faults are related to the live parts of the transformer, especially short-circuit faults between internal windings and taps. Internal faults usually have a certain development process, and it is difficult for power grid operators to detect and deal with them in time from the outside.
目前配电变压器内部故障发现与处理通常在春秋季预检与大修中完成，需要变压器长期停电进行实验与拆卸检查，影响客户正常用电，同时由于设备精度原因部分轻微故障可能无法得到准确检测。导致部分配电变压器长期带病运行，潜在问题不能得到及时解决，增加变压器损毁概率，造成严重的经济损失与客服满意度降低。At present, the discovery and treatment of internal faults in distribution transformers are usually completed during pre-inspection and overhaul in spring and autumn, which requires long-term power outages for experiments and disassembly inspections of the transformers, affecting customers' normal power consumption. At the same time, some minor faults may not be accurately detected due to equipment accuracy. As a result, some distribution transformers have been running sick for a long time, and potential problems cannot be solved in time, which increases the probability of transformer damage, causing serious economic losses and reduced customer service satisfaction.
因此缺少高效且不损伤变压器结构完整性的检测方法，能够在较短的停电时间内完成对变压器内部情况的检测，并对其运行状态进行评级，以为电网运行人员的决策提供参考。Therefore, there is a lack of a detection method that is efficient and does not damage the structural integrity of the transformer. It can detect the internal conditions of the transformer within a short power outage and rate its operating status to provide a reference for the decision-making of power grid operators.
发明内容Contents of the invention
有鉴于此，本发明的目的在于提供一种配电变压器状态判别方法、系统、装置及计算机可读存储介质，能够对配电变压器运行状态进行评级。其具体方案如下：In view of this, the object of the present invention is to provide a distribution transformer status identification method, system, device and computer-readable storage medium, which can rate the distribution transformer operating status. The specific plan is as follows:
一种配电变压器状态判别方法，包括：A distribution transformer status identification method, including:
测量并获取配电变压器内匝间短路电流；Measure and obtain the inter-turn short-circuit current in the distribution transformer;
利用所述配电变压器内匝间短路电流与预先指定的配电变压器状态判别标准进行比对，得到配电变压器状态；Compare the inter-turn short-circuit current in the distribution transformer with the pre-specified distribution transformer status discrimination standard to obtain the distribution transformer status;
其中，所述配电变压器状态判别标准的制定过程，包括：Among them, the formulation process of the distribution transformer status identification standard includes:
断开配电变压器的高压侧绕组注入电源；Disconnect the high-voltage side winding of the distribution transformer from injecting power;
在低压侧绕组端子两端注入扫频信号；Inject frequency sweep signals at both ends of the low-voltage side winding terminals;
调整变阻器阻值，得到多次预先设定的所述配电变压器处于各状态之间边界时的频率响应幅值及相应的统计学指标值；Adjust the resistance of the varistor to obtain multiple preset frequency response amplitudes and corresponding statistical index values when the distribution transformer is at the boundary between states;
利用所述配电变压器运行在各状态下统计学指标值，计算运行在所述配电变压器各状态内的置信度；Using the statistical index values of the distribution transformer operating in each state, calculate the confidence level of the distribution transformer operating in each state;
根据所述置信度，得到所述配电变压器状态判别标准。According to the confidence level, the distribution transformer status criterion is obtained.
可选的，所述利用所述配电变压器运行在各状态下统计学指标值，计算运行在所述配电变压器各状态内的置信度的过程，包括：Optionally, the process of calculating the confidence level of the distribution transformer operating in each state using the statistical index values of the distribution transformer operating in each state includes:
利用置信度计算公式和所述配电变压器运行在各状态下统计学指标值，计算运行在所述配电变压器各状态内的置信度；Calculate the confidence level of the distribution transformer operating in each state using the confidence calculation formula and the statistical index value of the distribution transformer operating in each state;
其中，所述置信度计算公式为：C(x)＝S(x|x∈P)/S(y|y∈Q)；Wherein, the confidence calculation formula is: C(x)=S(x|x∈P)/S(y|y∈Q);
式中，x为某一次测量得到的频率响应频谱的统计学指标值，S(x)为单变量高斯分布在x所属区域P内的面积，P为x所属区域的统计学指标值所有的取值集合，S(y)为单变量高斯分布在扫频范围内某一统计学指标所有的取值区域Q，Q为某一统计学指标值所有的取值集合，t为高斯分布函数积分变量，σ为标准差，d为区域P内所有统计学指标值的最小平均距离，α为校正因子，此处取值为0.674，zi、zj分别为统计学指标函数在区域P内第i与第j个取值点。In the formula, x is the statistical index value of the frequency response spectrum obtained from a certain measurement, S(x) is the area of the univariate Gaussian distribution in the area P to which x belongs, and P is the statistical index value of the area to which x belongs. Value set, S(y) is the value area Q of all the values of a certain statistical index within the frequency sweep range of the univariate Gaussian distribution, Q is the set of all the values of a certain statistical index, t is the Gaussian distribution function integral variable , σ is the standard deviation, d is the minimum average distance of all statistical index values in the area P, α is the correction factor, the value here is 0.674, zi and zj are respectively the i-th statistical index function in the area P and the jth value point.
本发明还公开了一种配电变压器状态判别系统，包括：The invention also discloses a distribution transformer status identification system, which includes:
短路电流获取模块，用于测量并获取配电变压器内匝间短路电流；The short-circuit current acquisition module is used to measure and acquire the inter-turn short-circuit current in the distribution transformer;
状态判别模块，用于利用所述配电变压器内匝间短路电流与预先指定的配电变压器状态判别标准进行比对，得到配电变压器状态；A status identification module used to compare the inter-turn short-circuit current in the distribution transformer with a pre-specified status identification standard to obtain the status of the distribution transformer;
其中，所述配电变压器状态判别标准的制定过程，包括：Among them, the formulation process of the distribution transformer status identification standard includes:
断开配电变压器的高压侧绕组注入电源；Disconnect the high-voltage side winding of the distribution transformer from injecting power;
在低压侧绕组端子两端注入扫频信号；Inject frequency sweep signals at both ends of the low-voltage side winding terminals;
调整变阻器阻值，得到多次预先设定的所述配电变压器处于各状态之间边界时的频率响应幅值及相应的统计学指标值；Adjust the resistance of the varistor to obtain multiple preset frequency response amplitudes and corresponding statistical index values when the distribution transformer is at the boundary between states;
利用所述配电变压器运行在各状态下统计学指标值，计算运行在所述配电变压器各状态内的置信度；Using the statistical index values of the distribution transformer operating in each state, calculate the confidence level of the distribution transformer operating in each state;
根据所述置信度，得到所述配电变压器状态判别标准。According to the confidence level, the distribution transformer status criterion is obtained.
可选的，所述利用所述配电变压器运行在各状态下统计学指标值，计算运行在所述配电变压器各状态内的置信度的过程，包括：Optionally, the process of calculating the confidence level of the distribution transformer operating in each state using the statistical index values of the distribution transformer operating in each state includes:
利用置信度计算公式和所述配电变压器运行在各状态下统计学指标值，计算运行在所述配电变压器各状态内的置信度；Calculate the confidence level of the distribution transformer operating in each state using the confidence calculation formula and the statistical index value of the distribution transformer operating in each state;
其中，所述置信度计算公式为：C(x)＝S(x|x∈P)/S(y|y∈Q)；Wherein, the confidence calculation formula is: C(x)=S(x|x∈P)/S(y|y∈Q);
式中，x为某一次测量得到的频率响应频谱的统计学指标值，S(x)为单变量高斯分布在x所属区域P内的面积，P为x所属区域的统计学指标值所有的取值集合，S(y)为单变量高斯分布在扫频范围内某一统计学指标所有的取值区域Q，Q为某一统计学指标值所有的取值集合，t为高斯分布函数积分变量，σ为标准差，d为区域P内所有统计学指标值的最小平均距离，α为校正因子，此处取值为0.674，zi、zj分别为统计学指标函数在区域P内第i与第j个取值点。In the formula, x is the statistical index value of the frequency response spectrum obtained from a certain measurement, S(x) is the area of the univariate Gaussian distribution in the area P to which x belongs, and P is the statistical index value of the area to which x belongs. Value set, S(y) is the value area Q of all the values of a certain statistical index within the frequency sweep range of the univariate Gaussian distribution, Q is the set of all the values of a certain statistical index, t is the Gaussian distribution function integral variable , σ is the standard deviation, d is the minimum average distance of all statistical index values in the area P, α is the correction factor, the value here is 0.674, zi and zj are respectively the i-th statistical index function in the area P and the jth value point.
本发明还公开了一种配电变压器状态判别装置，包括：The invention also discloses a distribution transformer status identification device, which includes:
存储器，用于存储计算机程序；Memory, used to store computer programs;
处理器，用于执行所述计算机程序以实现如前述的配电变压器状态判别方法。A processor, configured to execute the computer program to implement the aforementioned distribution transformer status determination method.
本发明还公开了一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如前述的配电变压器状态判别方法。The invention also discloses a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, the aforementioned method for determining the status of a distribution transformer is implemented.
本发明中，配电变压器状态判别方法，包括：测量并获取配电变压器内匝间短路电流；利用配电变压器内匝间短路电流与预先指定的配电变压器状态判别标准进行比对，得到配电变压器状态；其中，配电变压器状态判别标准的制定过程，包括：断开配电变压器的高压侧绕组注入电源；在低压侧绕组端子两端注入扫频信号；调整变阻器阻值，得到多次预先设定的配电变压器处于各状态之间边界时的频率响应幅值及相应的统计学指标值；利用配电变压器运行在各状态下统计学指标值，计算运行在配电变压器各状态内的置信度；根据置信度，得到配电变压器状态判别标准。In the present invention, the distribution transformer status identification method includes: measuring and obtaining the inter-turn short-circuit current in the distribution transformer; comparing the inter-turn short-circuit current in the distribution transformer with the pre-specified distribution transformer status identification standard to obtain the distribution transformer status identification method. The status of the electric transformer; among them, the process of formulating the standard for judging the status of the distribution transformer includes: disconnecting the high-voltage side winding of the distribution transformer and injecting power; injecting frequency sweep signals at both ends of the low-voltage side winding terminals; adjusting the resistance of the rheostat to obtain multiple The preset frequency response amplitude and corresponding statistical index value when the distribution transformer is at the boundary between each state; using the statistical index value of the distribution transformer operating in each state, calculate the operating conditions of the distribution transformer in each state The confidence level; based on the confidence level, the distribution transformer status criterion is obtained.
本发明预先制定配电变压器各工作状态的判断标准，通过测量当前配电变压器的短路电流与配电变压器状态判别标准相比较，就可以快速判断出配电变压器工作状态，提高了维护人员的检测效率。The invention pre-formulates the judgment standards for each working status of the distribution transformer. By measuring the short-circuit current of the current distribution transformer and comparing it with the status judgment standard of the distribution transformer, the working status of the distribution transformer can be quickly judged, which improves detection by maintenance personnel. efficiency.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without exerting creative efforts.
图1为本发明实施例公开的一种配电变压器状态判别方法流程示意图；Figure 1 is a schematic flow chart of a distribution transformer status identification method disclosed in an embodiment of the present invention;
图2为本发明实施例公开的一种短路监测实验装置结构示意图；Figure 2 is a schematic structural diagram of a short circuit monitoring experimental device disclosed in an embodiment of the present invention;
图3为本发明实施例公开的一种频率响应测量实验装置结构示意图；Figure 3 is a schematic structural diagram of a frequency response measurement experimental device disclosed in an embodiment of the present invention;
图4为本发明实施例公开的一种了配电变压器状态判别系统结构示意图。Figure 4 is a schematic structural diagram of a distribution transformer status identification system disclosed in an embodiment of the present invention.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
本发明实施例公开了一种配电变压器状态判别方法，参见图1所示，该方法包括：The embodiment of the present invention discloses a method for determining the status of a distribution transformer. As shown in Figure 1, the method includes:
S11：测量并获取配电变压器内匝间短路电流；S11: Measure and obtain the inter-turn short-circuit current in the distribution transformer;
S11：利用配电变压器内匝间短路电流与预先指定的配电变压器状态判别标准进行比对，得到配电变压器状态。S11: Compare the inter-turn short-circuit current in the distribution transformer with the pre-specified distribution transformer status criterion to obtain the status of the distribution transformer.
其中，配电变压器状态判别标准的制定过程，包括：Among them, the formulation process of distribution transformer status identification standards includes:
断开配电变压器的高压侧绕组注入电源；Disconnect the high-voltage side winding of the distribution transformer from injecting power;
在低压侧绕组端子两端注入扫频信号；Inject frequency sweep signals at both ends of the low-voltage side winding terminals;
调整变阻器阻值，得到多次预先设定的配电变压器处于各状态之间边界时的频率响应幅值及相应的统计学指标值；Adjust the resistance of the rheostat to obtain the frequency response amplitude and corresponding statistical index values of the distribution transformer at the boundary between various states that have been preset multiple times;
利用配电变压器运行在各状态下统计学指标值，计算运行在配电变压器各状态内的置信度；Using the statistical index values of the distribution transformer operating in each state, calculate the confidence level of the distribution transformer operating in each state;
根据置信度，得到配电变压器状态判别标准。According to the confidence level, the distribution transformer status criterion is obtained.
具体的，配电变压器状态判别标准可以具体包括①、正常(绿色)区域：变压器在该区域内为正常运行方式，此时配电变压器内匝间短路电流为零，通过变阻器的电流为0。②、绿-黄边界：通过减小变阻器的电阻，增加匝间短路的严重程度。通过变阻器的短路电流开始出现的电阻值即为绿色和黄色区域之间的边界。③、轻微故障(黄色)区域：变压器在该区域其内部出现了轻微匝间故障，此时配电变压器内匝间短路电流从零开始增大，通过变阻器的电流不为0。④、黄-红边界：通过变阻器的电流增加至变压器差动保护整定值的10％，也即标称电流的0.5％作为黄色区域所能容忍的短路电流的上限，此时的电阻值即为黄色与红色区域间的边界。⑤、严重故障(红色)区域：变压器在该区域其内部出现了严重的匝间故障，此时通过变阻器的电流超过了上黄-红区域边界的临界值。Specifically, the distribution transformer status identification criteria can specifically include ①, normal (green) area: the transformer is in normal operation mode in this area. At this time, the inter-turn short-circuit current in the distribution transformer is zero, and the current through the rheostat is 0. ②. Green-yellow boundary: By reducing the resistance of the varistor, the severity of the inter-turn short circuit is increased. The resistance value at which the short-circuit current through the varistor begins is the boundary between the green and yellow areas. ③. Minor fault (yellow) area: A slight inter-turn fault occurs in the transformer in this area. At this time, the inter-turn short-circuit current in the distribution transformer increases from zero, and the current through the varistor is not 0. ④. Yellow-red boundary: The current through the varistor increases to 10% of the transformer differential protection setting value, that is, 0.5% of the nominal current, which is the upper limit of the short-circuit current that can be tolerated in the yellow area. The resistance value at this time is The border between the yellow and red areas. ⑤. Severe fault (red) area: A serious inter-turn fault occurs within the transformer in this area. At this time, the current through the varistor exceeds the critical value of the upper yellow-red area boundary.
具体的，参见图2所示的方式对配电变压器绕组进行短路监测实验，变阻器ZR串接电流表(精度等级：1.5级)一端接于变压器低压侧绕组端子，另一端接于绕组各分接头，高压侧绕组接入工频交流电压源。通过调整变阻器的电阻值，模拟绕组匝间的绝缘情况改变，也即绕组匝间短路故障的严重程度。变阻器连接至某一分接头时，其阻值从5kΩ按每次调整500Ω为间隔逐步减小至0Ω，并记录不同阻值下流过电流表的电流。移动分接头位置，重复调整变阻器阻值及记录电流工作。Specifically, refer to the method shown in Figure 2 to conduct a short-circuit monitoring experiment on the distribution transformer winding. The varistor ZR is connected in series with an ammeter (accuracy level: 1.5). One end is connected to the low-voltage side winding terminal of the transformer, and the other end is connected to each tap of the winding. , the high-voltage side winding is connected to the power frequency AC voltage source. By adjusting the resistance value of the varistor, the change in the insulation condition between the winding turns is simulated, that is, the severity of the short circuit fault between the winding turns. When the rheostat is connected to a certain tap, its resistance value is gradually reduced from 5kΩ to 0Ω at intervals of 500Ω each time, and the current flowing through the ammeter at different resistance values is recorded. Move the tap position, repeatedly adjust the rheostat resistance and record the current.
具体的，采用图3中所示的方式对配电变压器绕组进行频率响应测量，图中Z为测量导线的电阻，断开高压侧绕组注入电源，将商业化频率响应分析(FRA)设备连接在低压侧绕组端子两端，设备注入扫频信号范围为0Hz到5KHz。将变阻器依次连接于不同分接头下，将其调整至步骤1中所测量得到的绿-黄边界、黄-红边界电阻值，测量此时的频率响应频谱，并根据其计算相关系数、标准偏差、误差平方和、对数误差绝对和等统计学指标值。Specifically, the frequency response measurement of the distribution transformer winding is carried out as shown in Figure 3. Z in the figure is the resistance of the measurement wire. The high-voltage side winding is disconnected and the power is injected, and the commercial frequency response analysis (FRA) equipment is connected. At both ends of the low-voltage side winding terminals, the device injects a frequency sweep signal ranging from 0Hz to 5KHz. Connect the varistor to different taps in turn, adjust it to the green-yellow boundary and yellow-red boundary resistance values measured in step 1, measure the frequency response spectrum at this time, and calculate the correlation coefficient and standard deviation based on it , sum of squared errors, absolute sum of logarithmic errors and other statistical index values.
进一步的，为了提高边界测量的精准度，利用配电变压器运行在各状态下统计学指标值，计算运行在配电变压器各状态内的置信度，通过置信度去除误差数据，提高精准度。Furthermore, in order to improve the accuracy of boundary measurement, the statistical index values of the distribution transformer operating in each state are used to calculate the confidence level of the distribution transformer operating in each state, and the error data is removed through the confidence level to improve accuracy.
可见，本发明实施例预先制定配电变压器各工作状态的判断标准，通过测量当前配电变压器的短路电流与配电变压器状态判别标准相比较，就可以快速判断出配电变压器工作状态，提高了维护人员的检测效率。It can be seen that the embodiment of the present invention pre-formulates the judgment standards for each working status of the distribution transformer. By measuring the short-circuit current of the current distribution transformer and comparing it with the status judgment standard of the distribution transformer, the working status of the distribution transformer can be quickly judged, which improves the efficiency of the distribution transformer. Detection efficiency of maintenance personnel.
进一步的，上述利用配电变压器运行在各状态下统计学指标值，计算运行在配电变压器各状态内的置信度的过程，包括：Furthermore, the above-mentioned process of calculating the confidence level of the distribution transformer operating in each state by using the statistical index values of the distribution transformer operating in each state includes:
利用置信度计算公式和配电变压器运行在各状态下统计学指标值，计算运行在配电变压器各状态内的置信度。The confidence degree of the distribution transformer operating in each state is calculated using the confidence calculation formula and the statistical index value of the distribution transformer operating in each state.
具体的，为了消除数据收集过程中带来的不确定性，引入统计学指标值位于各区域的置信度。对于某统计学指标值，其在某一状态区域内的置信度为以该点为中心即均值为该点处的值，标准差为σ(同一区域内所有统计指标值的方差都相同)的单变量高斯分布在该区域内的积分值。从频率观点看，置信度可以理解为重复实验下统计学指标值位于特定区域内的次数比例，有助于更客观的决策。Specifically, in order to eliminate the uncertainty caused by the data collection process, the confidence level of the statistical index value in each area is introduced. For a certain statistical indicator value, its confidence in a certain state area is centered on that point, that is, the mean value is the value at that point, and the standard deviation is σ (the variance of all statistical indicator values in the same area is the same) The integral value of a univariate Gaussian distribution within this region. From a frequency perspective, confidence can be understood as the proportion of times that a statistical indicator value is within a specific area under repeated experiments, which helps to make more objective decisions.
其中，置信度计算公式为：C(x)＝S(x|x∈P)/S(y|y∈Q)；Among them, the confidence calculation formula is: C(x)=S(x|x∈P)/S(y|y∈Q);
式中，x为某一次测量得到的频率响应频谱的统计学指标值，S(x)为单变量高斯分布在x所属区域P内的面积，P为x所属区域的统计学指标值所有的取值集合，S(y)为单变量高斯分布在扫频范围内某一统计学指标所有的取值区域Q，Q为某一统计学指标值所有的取值集合，t为高斯分布函数积分变量，σ为标准差，d为区域P内所有统计学指标值的最小平均距离，α为校正因子，此处取值为0.674，zi、zj分别为统计学指标函数在区域P内第i与第j个取值点。In the formula, x is the statistical index value of the frequency response spectrum obtained from a certain measurement, S(x) is the area of the univariate Gaussian distribution in the area P to which x belongs, and P is the statistical index value of the area to which x belongs. Value set, S(y) is the value area Q of all the values of a certain statistical index within the frequency sweep range of the univariate Gaussian distribution, Q is the set of all the values of a certain statistical index, t is the Gaussian distribution function integral variable , σ is the standard deviation, d is the minimum average distance of all statistical index values in the area P, α is the correction factor, the value here is 0.674, zi and zj are respectively the i-th statistical index function in the area P and the jth value point.
相应的，本发明实施例还公开了一种配电变压器状态判别系统，参见图4所示，该系统包括：Correspondingly, an embodiment of the present invention also discloses a distribution transformer status identification system, as shown in Figure 4. The system includes:
短路电流获取模块11，用于测量并获取配电变压器内匝间短路电流；The short-circuit current acquisition module 11 is used to measure and acquire the inter-turn short-circuit current in the distribution transformer;
状态判别模块12，用于利用配电变压器内匝间短路电流与预先指定的配电变压器状态判别标准进行比对，得到配电变压器状态；The status identification module 12 is used to compare the inter-turn short-circuit current in the distribution transformer with the pre-specified status identification standard of the distribution transformer to obtain the status of the distribution transformer;
其中，配电变压器状态判别标准的制定过程，包括：Among them, the formulation process of distribution transformer status identification standards includes:
断开配电变压器的高压侧绕组注入电源；Disconnect the high-voltage side winding of the distribution transformer from injecting power;
在低压侧绕组端子两端注入扫频信号；Inject frequency sweep signals at both ends of the low-voltage side winding terminals;
调整变阻器阻值，得到多次预先设定的配电变压器处于各状态之间边界时的频率响应幅值及相应的统计学指标值；Adjust the resistance of the rheostat to obtain the frequency response amplitude and corresponding statistical index values of the distribution transformer at the boundary between various states that have been preset multiple times;
利用配电变压器运行在各状态下统计学指标值，计算运行在配电变压器各状态内的置信度；Using the statistical index values of the distribution transformer operating in each state, calculate the confidence level of the distribution transformer operating in each state;
根据置信度，得到配电变压器状态判别标准。According to the confidence level, the distribution transformer status criterion is obtained.
可见，本发明实施例预先制定配电变压器各工作状态的判断标准，通过测量当前配电变压器的短路电流与配电变压器状态判别标准相比较，就可以快速判断出配电变压器工作状态，提高了维护人员的检测效率。It can be seen that the embodiment of the present invention pre-formulates the judgment standards for each working status of the distribution transformer. By measuring the short-circuit current of the current distribution transformer and comparing it with the status judgment standard of the distribution transformer, the working status of the distribution transformer can be quickly judged, which improves the efficiency of the distribution transformer. Detection efficiency of maintenance personnel.
可选的，利用配电变压器运行在各状态下统计学指标值，计算运行在配电变压器各状态内的置信度的过程，包括：Optionally, the process of calculating the confidence level of the distribution transformer operating in each state using the statistical index values of the distribution transformer operating in each state includes:
利用置信度计算公式和配电变压器运行在各状态下统计学指标值，计算运行在配电变压器各状态内的置信度；Use the confidence calculation formula and the statistical index values of the distribution transformer in each state to calculate the confidence level of the distribution transformer in each state;
其中，置信度计算公式为：C(x)＝S(x|x∈P)/S(y|y∈Q)；Among them, the confidence calculation formula is: C(x)=S(x|x∈P)/S(y|y∈Q);
式中，x为某一次测量得到的频率响应频谱的统计学指标值，S(x)为单变量高斯分布在x所属区域P内的面积，P为x所属区域的统计学指标值所有的取值集合，S(y)为单变量高斯分布在扫频范围内某一统计学指标所有的取值区域Q，Q为某一统计学指标值所有的取值集合，t为高斯分布函数积分变量，σ为标准差，d为区域P内所有统计学指标值的最小平均距离，α为校正因子，此处取值为0.674，zi、zj分别为统计学指标函数在区域P内第i与第j个取值点。In the formula, x is the statistical index value of the frequency response spectrum obtained from a certain measurement, S(x) is the area of the univariate Gaussian distribution in the area P to which x belongs, and P is the statistical index value of the area to which x belongs. Value set, S(y) is the value area Q of all the values of a certain statistical index within the frequency sweep range of the univariate Gaussian distribution, Q is the set of all the values of a certain statistical index, t is the Gaussian distribution function integral variable , σ is the standard deviation, d is the minimum average distance of all statistical index values in the area P, α is the correction factor, the value here is 0.674, zi and zj are respectively the i-th statistical index function in the area P and the jth value point.
此外，本发明实施例还公开了一种配电变压器状态判别装置，包括：In addition, the embodiment of the present invention also discloses a distribution transformer status identification device, which includes:
存储器，用于存储计算机程序；Memory, used to store computer programs;
处理器，用于执行计算机程序以实现如前述的配电变压器状态判别方法。The processor is configured to execute a computer program to implement the aforementioned distribution transformer status determination method.
另外，本发明实施例还公开了一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，计算机程序被处理器执行时实现如前述的配电变压器状态判别方法。In addition, embodiments of the present invention also disclose a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, the aforementioned distribution transformer status determination method is implemented.
最后，还需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。Finally, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or any such actual relationship or sequence between operations. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.
专业人员还可以进一步意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。Those skilled in the art may further realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. In order to clearly illustrate the possible functions of hardware and software, Interchangeability, in the above description, the composition and steps of each example have been generally described according to functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered to be beyond the scope of the present invention.
以上对本发明所提供的技术内容进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。The technical content provided by the present invention has been introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; At the same time, for those of ordinary skill in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. In summary, the content of this description should not be understood as limiting the present invention.
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| CN202111062717.5ACN113740779B (en) | 2021-09-10 | 2021-09-10 | Distribution transformer status identification method, system, device and storage medium |
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| CN202111062717.5ACN113740779B (en) | 2021-09-10 | 2021-09-10 | Distribution transformer status identification method, system, device and storage medium |
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| CN202111062717.5AActiveCN113740779B (en) | 2021-09-10 | 2021-09-10 | Distribution transformer status identification method, system, device and storage medium |
| Country | Link |
|---|---|
| CN (1) | CN113740779B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU711498A1 (en)* | 1978-04-12 | 1980-01-25 | Пензенский Филиал Всесоюзного Научно- Исследовательского Технологического Института Приборостроения | Transducer for device for monitoring interturn short-circuitings in transformer coils |
| CN202075343U (en)* | 2011-04-21 | 2011-12-14 | 深圳市锐能微科技有限公司 | Three phase electric energy meter and three phase electric energy correction system |
| EP3101570A1 (en)* | 2015-06-04 | 2016-12-07 | The MathWorks, Inc. | Extension of model-based design to identify and analyze impact of reliability information on systems and components |
| JP2017083397A (en)* | 2015-10-30 | 2017-05-18 | 富士通株式会社 | Connection phase determination confidence level calculation program, device, and method |
| CN106841932A (en)* | 2017-04-19 | 2017-06-13 | 国网江苏省电力公司泗洪县供电公司 | Fault Location in Distribution Network based on short circuit current |
| CA3011985A1 (en)* | 2016-02-03 | 2017-08-31 | General Electric Company | Systems and methods for monitoring and diagnosing transformer health |
| CN112395959A (en)* | 2020-10-30 | 2021-02-23 | 天合云能源互联网技术(杭州)有限公司 | Power transformer fault prediction and diagnosis method and system based on audio features |
| CN112731211A (en)* | 2021-02-06 | 2021-04-30 | 山东理工大学 | Grounding transformer low-voltage winding turn-to-turn short circuit fault and phase identification method |
| CN112924897A (en)* | 2020-12-30 | 2021-06-08 | 广东电网有限责任公司电力科学研究院 | Online evaluation method and device for short-circuit electrodynamic force of transformer |
| CN112946563A (en)* | 2021-03-16 | 2021-06-11 | 合肥艾通自动化工程有限公司 | Rapid calibration method for three-phase intelligent electric meter and three-phase intelligent electric meter |
| CN113176531A (en)* | 2021-05-24 | 2021-07-27 | 苏州大学 | Passive calibration method of intelligent electric meter |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11183878B2 (en)* | 2017-08-07 | 2021-11-23 | Landis+Gyr Innovations, Inc. | Maintaining connectivity information for meters and transformers located in a power distribution network |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU711498A1 (en)* | 1978-04-12 | 1980-01-25 | Пензенский Филиал Всесоюзного Научно- Исследовательского Технологического Института Приборостроения | Transducer for device for monitoring interturn short-circuitings in transformer coils |
| CN202075343U (en)* | 2011-04-21 | 2011-12-14 | 深圳市锐能微科技有限公司 | Three phase electric energy meter and three phase electric energy correction system |
| EP3101570A1 (en)* | 2015-06-04 | 2016-12-07 | The MathWorks, Inc. | Extension of model-based design to identify and analyze impact of reliability information on systems and components |
| JP2017083397A (en)* | 2015-10-30 | 2017-05-18 | 富士通株式会社 | Connection phase determination confidence level calculation program, device, and method |
| CA3011985A1 (en)* | 2016-02-03 | 2017-08-31 | General Electric Company | Systems and methods for monitoring and diagnosing transformer health |
| CN106841932A (en)* | 2017-04-19 | 2017-06-13 | 国网江苏省电力公司泗洪县供电公司 | Fault Location in Distribution Network based on short circuit current |
| CN112395959A (en)* | 2020-10-30 | 2021-02-23 | 天合云能源互联网技术(杭州)有限公司 | Power transformer fault prediction and diagnosis method and system based on audio features |
| CN112924897A (en)* | 2020-12-30 | 2021-06-08 | 广东电网有限责任公司电力科学研究院 | Online evaluation method and device for short-circuit electrodynamic force of transformer |
| CN112731211A (en)* | 2021-02-06 | 2021-04-30 | 山东理工大学 | Grounding transformer low-voltage winding turn-to-turn short circuit fault and phase identification method |
| CN112946563A (en)* | 2021-03-16 | 2021-06-11 | 合肥艾通自动化工程有限公司 | Rapid calibration method for three-phase intelligent electric meter and three-phase intelligent electric meter |
| CN113176531A (en)* | 2021-05-24 | 2021-07-27 | 苏州大学 | Passive calibration method of intelligent electric meter |
| Publication number | Publication date |
|---|---|
| CN113740779A (en) | 2021-12-03 |
| Publication | Publication Date | Title |
|---|---|---|
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