CN115792492A - A 10kV overhead line portable ground fault rapid location measuring instrument - Google Patents
A 10kV overhead line portable ground fault rapid location measuring instrumentDownload PDFInfo
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- CN115792492A CN115792492ACN202211495991.6ACN202211495991ACN115792492ACN 115792492 ACN115792492 ACN 115792492ACN 202211495991 ACN202211495991 ACN 202211495991ACN 115792492 ACN115792492 ACN 115792492A
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及接地故障快速定位测量技术领域，特别是涉及一种10kV架空线路便携式接地故障快速定位测量仪。The invention relates to the technical field of quick location and measurement of ground faults, in particular to a portable quick location measurement instrument for ground faults of 10kV overhead lines.
背景技术Background technique
我国10kV配电网以架空线为主，并存在电缆、架空线混合线路。网络拓扑多呈辐射状，除主干线之外，还存在大量分支线路，结构复杂。近几年来，随着电网改造工程的实施，10kV配电线路由原来的“两线一地”供电方式改造为中性点不接地的“三相三线”供电方式。10kV配电线路供电方式的改变，增强了配电线路的绝缘水平，降低了配电线路的跳闸率，提高了供电可靠性，减少了线路损耗。但采取新的供电方式在实际运行中，经常的发生接地故障，特别是在大风、暴雨、冰雹、雪等恶劣天气情况下，接地故障频繁发生，严重影响了变电设备和配电网的安全、经济运行。my country's 10kV distribution network is dominated by overhead lines, and there are mixed lines of cables and overhead lines. The topology of the network is mostly radial. In addition to the main line, there are also a large number of branch lines, and the structure is complex. In recent years, with the implementation of the power grid reconstruction project, the 10kV distribution line has been transformed from the original "two lines and one ground" power supply mode to the "three-phase three-wire" power supply mode with the neutral point not grounded. The change of the power supply mode of the 10kV distribution line has enhanced the insulation level of the distribution line, reduced the trip rate of the distribution line, improved the reliability of the power supply, and reduced the line loss. However, in the actual operation of the new power supply mode, ground faults often occur, especially in severe weather conditions such as strong winds, heavy rain, hail, and snow. Ground faults occur frequently, which seriously affects the safety of substation equipment and distribution networks. ,Economic Operation.
故障发生后，由于线长范围广，采用以往凭经验，分段逐段推拉，逐级杆塔检查等传统方法进行排查，费时费力，停电范围大，时间长，很难快速准确查到故障点，严重影响供电可靠性。After a fault occurs, due to the wide range of line lengths, it is time-consuming and labor-intensive to use traditional methods such as push-pull segment by segment and pole-tower inspection step by step based on previous experience. Seriously affect the reliability of power supply.
目前，工程实践中应用较多的单相接地故障巡查装置大多采用S信号注入法进行故障点位置查找。但注入信号源的测量需作业人员登杆测量，一个完整的故障点查找过程大约需要登杆3-5次，这无疑给故障查找带来很大的工作强度。查找效率较低，不仅增加了停电检修时间，也增加了人员登高作业的安全隐患。也有采用信号注入+故障指示器翻牌的定位方法，但故障定位精度受故障指示器的密度制约，电流检测精度较差，故障定位准确率不高。At present, most of the single-phase ground fault inspection devices used in engineering practice mostly use the S signal injection method to find the fault point location. However, the measurement of the injected signal source requires the operator to climb the pole for measurement. A complete fault point finding process requires about 3-5 times of climbing the pole, which undoubtedly brings a lot of work intensity to the fault finding. The search efficiency is low, which not only increases the maintenance time of power outages, but also increases the safety hazards of personnel climbing operations. There is also a positioning method that uses signal injection + fault indicator flipping, but the fault location accuracy is restricted by the density of the fault indicator, the current detection accuracy is poor, and the fault location accuracy is not high.
因此，发明一种10kV架空线路便携式接地故障快速定位测量仪来解决上述问题很有必要。Therefore, it is necessary to invent a portable ground fault rapid location measuring instrument for 10kV overhead lines to solve the above problems.
发明内容Contents of the invention
本发明的目的是提供一种10kV架空线路便携式接地故障快速定位测量仪，通过设置控制器和非接触式电流传感器，可以实现对架空线路上所施加检测信号电流的智能非接触感应测量，取代在传统S信号注入法接地故障巡查中使用钳形电流表必须登杆测量检测信号的问题，在保证信号准确可靠测量的情况下实现了不登杆或少登杆情况下快速定位故障位置，大大减少了停电次数和检修时间，提高了故障检修工作效率，同时进一步降低巡检工人在使用钳表测量时带来的工作强度，消除人员频繁上下杆安全隐患，减少配网线路因接地故障处理时间长时间停电给用户造成的影响，进一步提高配电网运维检修整体技术水平，以解决技术中的上述不足之处。The purpose of the present invention is to provide a portable ground fault rapid location measuring instrument for 10kV overhead lines. By setting a controller and a non-contact current sensor, the intelligent non-contact induction measurement of the detection signal current applied on the overhead line can be realized, replacing the ground fault in the overhead line. In the ground fault inspection of the traditional S signal injection method, the clamp ammeter must be used to measure the detection signal on the pole. Under the condition of ensuring the accurate and reliable measurement of the signal, the fault location can be quickly located without or less than the pole, which greatly reduces the The number of power outages and maintenance time improves the efficiency of troubleshooting, and at the same time further reduces the work intensity of inspection workers when using clamp meters to measure, eliminates the potential safety hazards of frequent personnel going up and down the pole, and reduces the long processing time of distribution network lines due to grounding faults The impact of power outages on users will further improve the overall technical level of distribution network operation and maintenance to solve the above-mentioned deficiencies in technology.
为了实现上述目的，本发明提供如下技术方案：一种10kV架空线路便携式接地故障快速定位测量仪，包括智能主机和探测器，所述智能主机包括设在外壳体内部的控制器和设在外壳体前端的触摸式液晶显示器，所述探测器包括设在外壳体顶端的非接触式电流传感器，所述触摸式液晶显示器与控制器的输入端和输出端交互连接，所述非接触式电流传感器与控制器的输入端相连接；In order to achieve the above object, the present invention provides the following technical solutions: a portable ground fault rapid location measuring instrument for 10kV overhead lines, including a smart host and a detector, the smart host includes a controller inside the outer shell and a A touch-type liquid crystal display at the front end, the detector includes a non-contact current sensor located on the top of the outer casing, the touch-type liquid crystal display is interactively connected with the input end and output end of the controller, and the non-contact current sensor is connected with the The input terminals of the controller are connected;
所述控制器根据非接触式电流传感器接收到的电流信号来进行分析并对接地故障位置进行定位；The controller analyzes the current signal received by the non-contact current sensor and locates the location of the ground fault;
所述触摸式液晶显示器可以就地实现数据显示和命令控制及参数修改等功能；The touch-type liquid crystal display can realize functions such as data display, command control and parameter modification on the spot;
所述非接触式电流传感器为闭合回路且结构特殊的罗氏线圈感应器，可以进行非接触式电流感应。The non-contact current sensor is a Rogowski coil inductor with a closed loop and special structure, which can perform non-contact current induction.
优选的，所述外壳体内壁上固定设有橡胶防护层，所述控制器设在橡胶防护层内部，便于对控制器进行防护。Preferably, a rubber protective layer is fixed on the inner wall of the housing, and the controller is arranged inside the rubber protective layer, so as to facilitate protection of the controller.
优选的，所述外壳体前端设有防护盖板，所述防护盖板一侧与外壳体一侧之间通过铰链相连接，所述防护盖板设在触摸式液晶显示器前侧，所述防护盖板前端固定设有把手，便于对触摸式液晶显示器进行防护。Preferably, the front end of the outer casing is provided with a protective cover, one side of the protective cover is connected to one side of the outer casing through a hinge, the protective cover is arranged on the front side of the touch-type liquid crystal display, and the protective cover A handle is fixed at the front end of the cover plate, which is convenient for protecting the touch-type liquid crystal display.
优选的，所述外壳体底端四角均固定设有刹车轮，便于定位测量仪的移动。Preferably, brake wheels are fixed at the four corners of the bottom end of the outer casing to facilitate the movement of the positioning measuring instrument.
优选的，所述外壳体一侧固定设有拉杆盒，所述拉杆盒上设有拉杆，便于推动定位测量仪进行移动。Preferably, a trolley box is fixed on one side of the outer casing, and a trolley box is provided on the trolley box to facilitate the movement of the positioning measuring instrument.
优选的，所述外壳体底端设有四个伸缩杆固定部，所述伸缩杆固定部内侧与外壳体底端之间铰接，所述伸缩杆固定部设在刹车轮内侧，所述伸缩杆固定部一端连接有伸缩杆活动部，所述伸缩杆活动部一端延伸入伸缩杆固定部一端内部，所述伸缩杆固定部与伸缩杆活动部之间通过螺栓紧固，所述伸缩杆活动部另一端固定设有支撑板，所述支撑板顶端固定设有卡接块，所述外壳体底端开设有四个与卡接块相对应的卡接槽，所述卡接块设在卡接槽内部，便于对定位测量仪进行支撑，且可以调节支撑的高度，适用性较强。Preferably, the bottom end of the outer casing is provided with four telescopic rod fixing parts, the inner side of the telescopic rod fixing part is hinged with the bottom end of the outer casing, the telescopic rod fixing part is arranged on the inner side of the brake wheel, and the telescopic rod One end of the fixed part is connected with the movable part of the telescopic rod, and one end of the movable part of the telescopic rod extends into the interior of one end of the fixed part of the telescopic rod, and the fixed part of the telescopic rod and the movable part of the telescopic rod are fastened by bolts, and the movable part of the telescopic rod The other end is fixed with a support plate, the top of the support plate is fixed with a clamping block, and the bottom of the outer shell is provided with four clamping slots corresponding to the clamping blocks, and the clamping block is arranged on the clamping block. Inside the groove, it is convenient to support the positioning measuring instrument, and the height of the support can be adjusted, which has strong applicability.
优选的，所述外壳体后端固定设有两个肩带和一个橡胶垫，所述橡胶垫设在两个肩带之间，便于背动定位测量仪进行移动，便于定位测量仪的差路段携带。Preferably, the rear end of the outer casing is fixed with two shoulder straps and a rubber pad, and the rubber pad is arranged between the two shoulder straps to facilitate the movement of the back-moving positioning measuring instrument, and to facilitate the positioning of the measuring instrument on the differential road section. carry.
还包括该接地故障快速定位测量仪的使用方法，其步骤为：It also includes a method for using the ground fault rapid location measuring instrument, the steps of which are:
S1：将智能主机和探测器放到架空线路下方的地面上，使得非接触式电流传感器位于导线的下方，将把手向一侧拉动来将防护盖板打开；S1: Put the smart host and the detector on the ground below the overhead line, so that the non-contact current sensor is located under the wire, and pull the handle to one side to open the protective cover;
S2：使用外部的信号发射器通过母线PT向故障线路故障相注入220Hz的三相短接S信号电流，通过物流关系分析确定检测信号与干扰信号的信噪比S/N，进一步通过专用电路来对S/N进行调理使得其可以对电流信号实现非接触探测，然后通过仿真与实际电路测试来修正参数，这样非接触式电流传感器就可以对信号进行非接触式测量，注入信号后带着非接触式电流传感器沿着线路进行探测；S2: Use an external signal transmitter to inject a 220Hz three-phase short-circuit S signal current to the faulty phase of the faulty line through the bus PT, and determine the signal-to-noise ratio S/N of the detection signal and the interference signal through the analysis of the logistics relationship, and further use a dedicated circuit to Conditioning the S/N makes it possible to realize non-contact detection of current signals, and then correct parameters through simulation and actual circuit testing, so that non-contact current sensors can perform non-contact measurement of signals, and inject signals with non-contact Contact current sensors detect along the line;
S3：非接触式电流传感器会将探测信号传递给控制器，控制器会根据采集检测到的电流信号及故障位置判据，结合相关运算算法实现故障点的快速准确定位，定位的位置和信息会通过触摸式液晶显示器来展示在给测量人员。S3: The non-contact current sensor will transmit the detection signal to the controller, and the controller will realize the rapid and accurate location of the fault point based on the collected and detected current signal and the fault location criterion, combined with relevant calculation algorithms, and the location and information of the location will be It is displayed to the measuring personnel through the touch LCD display.
本发明的有益效果：Beneficial effects of the present invention:
1、通过设置刹车轮、拉杆盒和拉杆，使得定位测量仪可以快速进行地面移动，通过设置肩带，使得定位测量仪可以背起携带，便于路况不好的地段中定位测量仪的使用，这使得装置的移动携带较为简单便捷，且适用性较强，且测量仪的高度可以将调节，进一步的提高了测量仪的实用性；1. By setting the brake wheel, trolley box and pull rod, the positioning measuring instrument can be quickly moved on the ground. By setting the shoulder strap, the positioning measuring instrument can be carried on the back, which is convenient for the use of the positioning measuring instrument in the poor road conditions. It makes the mobile and carrying of the device relatively simple and convenient, and has strong applicability, and the height of the measuring instrument can be adjusted, which further improves the practicability of the measuring instrument;
2、通过设置控制器和非接触式电流传感器，可以实现对架空线路上所施加检测信号电流的智能非接触感应测量，取代在传统S信号注入法接地故障巡查中使用钳形电流表必须登杆测量检测信号的问题，在保证信号准确可靠测量的情况下实现了不登杆或少登杆情况下快速定位故障位置，大大减少了停电次数和检修时间，提高了故障检修工作效率，同时进一步降低巡检工人在使用钳表测量时带来的工作强度，消除人员频繁上下杆安全隐患，减少配网线路因接地故障处理时间长时间停电给用户造成的影响，进一步提高配电网运维检修整体技术水平。2. By setting the controller and the non-contact current sensor, the intelligent non-contact induction measurement of the detection signal current applied on the overhead line can be realized, replacing the use of the clamp ammeter in the traditional S signal injection method ground fault inspection, which must be measured on the pole The problem of detecting the signal, under the condition of ensuring accurate and reliable signal measurement, the fault location can be quickly located without or less than the pole, greatly reducing the number of power outages and maintenance time, improving the efficiency of troubleshooting, and further reducing the number of patrols. Inspect the work intensity brought by workers when using the clamp meter to eliminate the potential safety hazards of personnel frequently going up and down the pole, reduce the impact of long-term power outages on distribution network lines due to ground fault processing time, and further improve the overall technology of distribution network operation and maintenance level.
附图说明Description of drawings
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例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中记载的一些实施例，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings that are required in the embodiments. Obviously, the accompanying drawings in the following description are only described in the present invention For some embodiments of the present invention, those skilled in the art can also obtain other drawings according to these drawings.
图1为本发明的整体结构示意图一；Fig. 1 is a schematic diagram of the overall structure of the present invention;
图2为本发明的整体结构示意图二；Fig. 2 is the overall structural schematic diagram II of the present invention;
图3为本发明的整体结构示意图三；Fig. 3 is a schematic diagram of the overall structure of the present invention three;
图4为本发明的整体立体剖视结构示意图；Fig. 4 is the overall three-dimensional sectional structure schematic diagram of the present invention;
图5为本发明的图4中A放大结构示意图；Fig. 5 is a schematic diagram of an enlarged structure of A in Fig. 4 of the present invention;
图6为本发明的三相短接注入法示意图；Fig. 6 is a schematic diagram of the three-phase short-circuit injection method of the present invention;
附图标记说明：Explanation of reference signs:
1、外壳体；2、控制器；3、触摸式液晶显示器；4、非接触式电流传感器；5、橡胶防护层；6、防护盖板；7、把手；8、刹车轮；9、拉杆盒；10、拉杆；11、伸缩杆固定部；12、伸缩杆活动部；13、支撑板；14、卡接块；15、卡接槽；16、肩带；17、橡胶垫。1. Outer shell; 2. Controller; 3. Touch LCD display; 4. Non-contact current sensor; 5. Rubber protective layer; 6. Protective cover; 7. Handle; 8. Brake wheel; 9. Trolley box ; 10, pull rod; 11, fixed part of telescopic rod; 12, movable part of telescopic rod; 13, support plate;
具体实施方式Detailed ways
为了使本领域的技术人员更好地理解本发明的技术方案，下面将结合附图对本发明作进一步的详细介绍。In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.
本发明提供了如图1、3、4和5所示的一种10kV架空线路便携式接地故障快速定位测量仪，包括智能主机和探测器，智能主机包括设在外壳体1内部的控制器2和设在外壳体1前端的触摸式液晶显示器3，探测器包括设在外壳体1顶端的非接触式电流传感器4，触摸式液晶显示器3与控制器2的输入端和输出端交互连接，非接触式电流传感器4与控制器2的输入端相连接；The present invention provides a kind of 10kV overhead line portable grounding fault quick location measuring instrument as shown in Figure 1, 3, 4 and 5, comprise intelligent mainframe and detector, intelligent mainframe comprises the
控制器2根据非接触式电流传感器4接收到的电流信号来进行分析并对接地故障位置进行定位；The
触摸式液晶显示器3可以就地实现数据显示和命令控制及参数修改等功能；The touch-type
非接触式电流传感器4为闭合回路且结构特殊的罗氏线圈感应器，可以进行非接触式电流感应。The non-contact
外壳体1内壁上固定设有橡胶防护层5，控制器2设在橡胶防护层5内部，外壳体1前端设有防护盖板6，防护盖板6一侧与外壳体1一侧之间通过铰链相连接，防护盖板6设在触摸式液晶显示器3前侧，防护盖板6前端固定设有把手7，便于对控制器2和触摸式液晶显示器3进行防护。A rubber
外壳体1底端设有四个伸缩杆固定部11，伸缩杆固定部11内侧与外壳体1底端之间铰接，伸缩杆固定部11设在刹车轮8内侧，伸缩杆固定部11一端连接有伸缩杆活动部12，伸缩杆活动部12一端延伸入伸缩杆固定部11一端内部，伸缩杆固定部11与伸缩杆活动部12之间通过螺栓紧固，伸缩杆活动部12另一端固定设有支撑板13，支撑板13顶端固定设有卡接块14，外壳体1底端开设有四个与卡接块14相对应的卡接槽15，卡接块14设在卡接槽15内部。The bottom end of the
将智能主机和探测器放到架空线路下方的地面上，使得非接触式电流传感器4位于导线的下方，将把手7向一侧拉动来将防护盖板6打开，这样就可以在触摸式液晶显示器3上去观测数据和输入指令，将四个伸缩杆固定部11和伸缩杆活动部12向外侧拉动，使得伸缩杆固定部11和伸缩杆活动部12及支撑板13变到竖直方向，这样就可以将控制器2、触摸式液晶显示器3和非接触式电流传感器4进行支撑固定，且伸缩杆固定部11和伸缩杆活动部12的高度可以进行调节，进而便于不同身高的人站在触摸式液晶显示器3前端进行操作，适用性较强。Put the smart host and the detector on the ground below the overhead line, so that the non-contact
本发明提供了如图1和2所示的一种10kV架空线路便携式接地故障快速定位测量仪，外壳体1底端四角均固定设有刹车轮8，外壳体1一侧固定设有拉杆盒9，拉杆盒9上设有拉杆10。The present invention provides a 10kV overhead line portable grounding fault rapid location measuring instrument as shown in Figures 1 and 2. The four corners of the bottom of the
外壳体1后端固定设有两个肩带16和一个橡胶垫17，橡胶垫17设在两个肩带16之间。The rear end of the
使用外部的信号发射器通过母线PT向故障线路故障相注入220Hz的三相短接S信号电流，通过物流关系分析确定检测信号与干扰信号的信噪比S/N，进一步通过专用电路来对S/N进行调理使得其可以对电流信号实现非接触探测，然后通过仿真与实际电路测试来修正参数，这样非接触式电流传感器4就可以对信号进行非接触式测量，注入信号后带着非接触式电流传感器4沿着线路进行探测，非接触式电流传感器4在进行移动测量时，可以由测量人员使用肩带16背着装置移动，也可以将装置放到地面上，拉出拉杆10来拉动装置进行移动，根据现场的路况可以选择不同的移动方式，这使得定位测量仪的携带较为简单便捷，且可选择性较多。Use an external signal transmitter to inject a 220Hz three-phase short-circuit S signal current into the faulty phase of the faulty line through the bus PT, determine the signal-to-noise ratio S/N of the detection signal and the interference signal through the analysis of the logistics relationship, and further use a special circuit to control the S /N for conditioning so that it can realize non-contact detection of current signals, and then correct parameters through simulation and actual circuit testing, so that non-contact
本发明提供了如图6所示的一种10kV架空线路便携式接地故障快速定位测量仪，非接触式电流传感器4会将探测信号传递给控制器2，控制器2会根据采集检测到的电流信号及故障位置判据，结合相关运算算法实现故障点的快速准确定位，定位方法是根据三相电容电流是基本相等的原理，当发生接地故障时，由于接地点对注入信号分流的原因电流Z，接地相的电流会变大为a+Z，由此可进行接地故障位置判定：在信号注入点非接地侧即信号注入点小号侧，三相电流基本相等，可以判定信号注入点小号侧无接地；在信号注入点接地侧即信号注入点大号侧，接地电流大于其它非接地相电流a+Z＞a，且非接地相电流基本相等a，由此判定接地故障在信号注入点大号侧；在大号侧远端测量，接地点后三相电流基本相等电流c，根据接地相电流的突变即可判定故障点位置；故障点位置和信息会通过触摸式液晶显示器3来展示在给测量人员。The present invention provides a 10kV overhead line portable ground fault fast location measuring instrument as shown in Figure 6, the non-contact
本发明通过设置控制器2和非接触式电流传感器4，可以实现对架空线路上所施加检测信号电流的智能非接触感应测量，取代在传统S信号注入法接地故障巡查中使用钳形电流表必须登杆测量检测信号的问题，在保证信号准确可靠测量的情况下实现了不登杆或少登杆情况下快速定位故障位置，大大减少了停电次数和检修时间，提高了故障检修工作效率，同时进一步降低巡检工人在使用钳表测量时带来的工作强度，消除人员频繁上下杆安全隐患，减少配网线路因接地故障处理时间长时间停电给用户造成的影响，进一步提高配电网运维检修整体技术水平。In the present invention, by setting the
以上只通过说明的方式描述了本发明的某些示范性实施例，毋庸置疑，对于本领域的普通技术人员，在不偏离本发明的精神和范围的情况下，可以用各种不同的方式对所描述的实施例进行修正。因此，上述附图和描述在本质上是说明性的，不应理解为对本发明权利要求保护范围的限制。Certain exemplary embodiments of the present invention have been described above only by way of illustration, and it goes without saying that those skilled in the art can use various methods without departing from the spirit and scope of the present invention. The described embodiments are modified. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.
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