CN111426916A - A method and system for simulating grounding pole line faults - Google Patents

A method and system for simulating grounding pole line faults Download PDF

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CN111426916A
CN111426916A CN202010408095.6A CN202010408095A CN111426916A CN 111426916 A CN111426916 A CN 111426916A CN 202010408095 A CN202010408095 A CN 202010408095A CN 111426916 A CN111426916 A CN 111426916A
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line
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CN111426916B (en
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束洪春
马御棠
方正云
朱梦梦
安娜
马仪
田鑫萃
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Kunming University of Science and Technology
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    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
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Abstract

本发明涉及一种接地极线路故障模拟方法和系统,属于高压电技术领域。所述方法先确定接地极线路中的模拟试验杆塔;再在模拟试验杆塔安装辅助试验装置;再安装模拟试验装置;再安装模拟引线,最后线路带电,启动接地极线路模拟试验装置,实现接地极线路接地故障模拟。所述的接地极线路故障模拟系统包括由绝缘支撑杆和垂直导线构成的辅助试验装置以及由传动模块、动力模块、输入模块、控制模块、电流检测以及引弧线操作模块等构成。通过该故障模拟方法和系统,可以实现接地极线路故障的准确模拟。

Figure 202010408095

The invention relates to a grounding electrode line fault simulation method and system, and belongs to the technical field of high-voltage electricity. The method firstly determines the simulated test tower in the ground electrode line; then installs an auxiliary test device on the simulated test tower; then installs the simulated test device; then installs the simulated lead wire, finally the line is electrified, starts the ground electrode circuit simulation test device, and realizes the ground electrode Line ground fault simulation. The grounding electrode line fault simulation system includes an auxiliary test device composed of an insulating support rod and a vertical wire, and a transmission module, a power module, an input module, a control module, a current detection, and an arc-striking line operation module. Through the fault simulation method and system, accurate simulation of grounding pole line faults can be achieved.

Figure 202010408095

Description

一种接地极线路故障模拟方法及系统A method and system for simulating grounding pole line faults

技术领域technical field

本发明涉及一种接地极线路故障模拟方法和系统,属于高压电技术领域。The invention relates to a grounding electrode line fault simulation method and system, and belongs to the technical field of high-voltage electricity.

背景技术Background technique

直流接地极及直流接地极线路是直流输电工程的重要组成部分,开展接地极线路故障模拟,是为了检验直流控制保护系统能否在故障下准确动作,检验故障测距系统能否准确的进行故障距离的测量,是直流工程调试过程中最为重要的一步。传统的直流接地极故障模拟中,在需要在试验时,先对整个直流线路以及直流接地极线路进行停电,在停电后,将试验装置,如短路试验框,悬挂在接地极线路试验位置。然后恢复送电,采用弹射装置或者弓弩装置将一根接地的引弧试验线带入短路试验框,从而形成故障模拟,或者采用人工的方式,进行故障的模拟。不管采用这两种方式中的哪一种,都需要停电,而直流输电输送的电量都比较大,造成较大的停电损失。同时,直流接地极线路的保护与直流线路、交流线路保护等不同,采用上诉方式时,线路故障的持续时间很难准确把握,如果持续时间太短,系统判断为扰动,保护系统不动作;如果持续时间太长,系统判断为永久性故障,系统闭锁,停止送电,给系统带来较大的不利影响。如何在进行接地极线路不停电下的故障的模拟,并持续规定的时间,达到试验目的,成为本领域亟待解决的技术问题。The DC grounding electrode and the DC grounding electrode line are an important part of the DC power transmission project. The grounding electrode line fault simulation is carried out to test whether the DC control and protection system can operate accurately under the fault, and whether the fault location system can accurately carry out the fault. Distance measurement is the most important step in the process of DC engineering debugging. In the traditional DC ground electrode fault simulation, when the test is required, the entire DC line and the DC ground electrode line are first powered off. After the power failure, the test device, such as a short-circuit test frame, is suspended at the ground electrode line test position. Then restore the power transmission, use a catapult device or a crossbow device to bring a grounded arc ignition test wire into the short-circuit test frame, so as to form a fault simulation, or use a manual method to simulate the fault. No matter which one of the two methods is adopted, a power outage is required, and the amount of electricity transmitted by the DC transmission is relatively large, resulting in a large power outage loss. At the same time, the protection of the DC grounding pole line is different from the protection of the DC line and the AC line. When the appeal method is adopted, it is difficult to accurately grasp the duration of the line fault. If the duration is too short, the system will judge it as a disturbance and the protection system will not act. If the duration is too long, the system will be judged as a permanent fault, the system will be blocked, and the power transmission will be stopped, which will bring great adverse effects to the system. How to simulate the fault of the grounding electrode line without power failure and continue for a specified time to achieve the purpose of the test has become a technical problem to be solved urgently in the field.

发明内容SUMMARY OF THE INVENTION

本发明要解决的技术问题是提供一种接地极线路故障模拟方法和系统,用于解决直流接地极故障模拟时故障持续时间不能准确模拟,影响试验效率和电网正常运行的问题。The technical problem to be solved by the present invention is to provide a grounding pole line fault simulation method and system, which is used to solve the problem that the fault duration cannot be accurately simulated during DC grounding fault simulation, which affects the test efficiency and the normal operation of the power grid.

本发明的技术方案是:一种接地极线路故障模拟试验方法,具体步骤为:The technical scheme of the present invention is: a grounding pole line fault simulation test method, the specific steps are:

Step1:根据调度要求的故障范围确定接地极线路故障模拟试验的杆塔N,通过杆塔N的塔图获取杆塔横档高度Ht和绝缘子串长度Lj;Step1: Determine the pole tower N of the grounding pole line fault simulation test according to the fault range required by the dispatching, and obtain the pole tower rung height Ht and the insulator string length Lj through the tower map of the pole tower N;

Step2:在模拟试验杆塔上安装辅助L型试验装置;Step2: Install the auxiliary L-type test device on the simulated test tower;

Step3:安装接地极线路模拟试验装置;Step3: Install the ground electrode circuit simulation test device;

Step4:安装故障模拟引线,故障模拟引线的一端连接至杆塔接地装置,另外一端连接模拟试验装置的引弧线操作装置;Step4: Install the fault simulation lead. One end of the fault simulation lead is connected to the tower grounding device, and the other end is connected to the arc-striking wire operating device of the simulation test device;

Step5:线路带电,启动接地极线路模拟试验装置,实现接地极线路接地故障模拟。Step 5: When the line is live, start the grounding electrode line simulation test device to realize the grounding fault simulation of the grounding electrode line.

优选的,所述Step1中接地极线路故障模拟试验的杆塔N为耐张塔。Preferably, the tower N in the grounding pole line fault simulation test in Step 1 is a tension tower.

优选的,所述Step2中安装辅助L型试验装置时,其支撑用的绝缘支撑杆位置对地高度H1满足对地安全绝缘大于3m。Preferably, when the auxiliary L-shaped test device is installed in the Step 2, the height H 1 of the insulating support rod used for its support to the ground satisfies that the safety insulation to the ground is greater than 3m.

优选的,所述Step2中安装辅助L型试验装置时,其导线引下线的长度为L3,L3=Ht-H1+Δ1+Δ2,Δ1为导线引下线在接地极线路上缠绕的长度,Δ2为导线引下线在绝缘支撑杆上缠绕的长度,所述的导线引下线通常为铜质材料。Preferably, when the auxiliary L-shaped test device is installed in the Step 2, the length of the lead wire is L 3 , L 3 = H t -H 1 +Δ1+Δ2, and Δ1 is the lead wire on the ground electrode line. The winding length, Δ2 is the length of the lead wire wound on the insulating support rod, and the lead wire is usually made of copper material.

优选的,所述Step2中安装模拟试验杆塔辅助L型试验装置前,在接地极线路上采用铝箔带进行缠绕保护,所示保护范围满足垂直导线3-4倍直径,宽度不少于10cm-20cm。Preferably, before installing the simulated test tower auxiliary L-type test device in Step 2, use aluminum foil tape to wrap the grounding electrode line for protection. .

优选的,所述Step4中确定引弧线的长度为L1Preferably, the length of the arc-starting line is determined to be L 1 in the Step 4;

Figure BDA0002492088980000021
Figure BDA0002492088980000021

其中,k1为安全系数,取值范围1.05-1.1之间,将引弧线一端与杆塔接地装置连接,另一端与通过引弧线操作模块实现故障模拟;Among them, k1 is the safety factor, and the value range is between 1.05-1.1. One end of the arc-striking line is connected to the tower grounding device, and the other end is connected to the arc-striking line operation module to achieve fault simulation;

所述的引弧线通常为1mm2-10mm2的裸铜线,一端连接杆塔接地装置,另一端连接引弧线。The arc pilot wire is usually a bare copper wire of 1mm 2 -10mm 2 , one end is connected to the tower grounding device, and the other end is connected to the arc pilot wire.

优选的,所述Step5接接地极线路模拟试验装置的控制方法为:Preferably, the control method of the Step5 grounding circuit simulation test device is:

Step5.1:输入保护电流整定值Iset和时间整定值Tset以及高度H1;Step5.1: Input protection current setting value Iset, time setting value Tset and height H1;

Step5.2;控制模块给动力模块信号,通过传动模块使得引弧线操作装置开始上升;Step5.2: The control module sends a signal to the power module, and through the transmission module, the arc-priming line operating device starts to rise;

Step5.3:判断引弧线操作装置上升的高度是否超过支撑用的绝缘支撑杆的高度;Step5.3: Judging whether the rising height of the arc-starting line operating device exceeds the height of the insulating support rod for support;

Step5.4:如果引弧线操作装置上升的高度超过支撑用的绝缘支撑杆的高度H1,则控制模块给动力模块下降信号,通过传动模块使得引弧线操作装置开始下降,回到初始位置,给出异常信号,试验装置位置不符合要求,试验结束。Step5.4: If the rising height of the arc pilot operating device exceeds the height H1 of the insulating support rod for support, the control module will give the power module a descending signal, and the transmission module will make the arc pilot operating device start to descend and return to the initial position. An abnormal signal is given, the position of the test device does not meet the requirements, and the test ends.

Step5.5:如果引弧线操作装置上升高度没有超过支撑用的绝缘支撑杆的高度,判断电流检测模块检测到的电流是是否小于0.2Iset,如果小于继续上升;Step5.5: If the rising height of the arc-striking wire operating device does not exceed the height of the insulating support rod for support, judge whether the current detected by the current detection module is less than 0.2Iset, and if it is less than continue to rise;

Step5.6:如果电流检测模块检测到的电流大于0.2Iset,则开始计时,并维持在该高度;Step5.6: If the current detected by the current detection module is greater than 0.2Iset, start timing and maintain it at this height;

Step5.7:如果计时超过Tset,则控制模块给动力模块下降信号,通过传动模块使得引弧线操作装置开始下降,回到初始位置,给出信号,试验正常,试验结束。Step5.7: If the timing exceeds Tset, the control module will give a lowering signal to the power module, through the transmission module, the arc-starting line operating device will start to drop, return to the initial position, and give a signal, the test is normal, and the test is over.

优选的,将导线引下线与支撑用的绝缘支撑杆以及直流接地极下线进行连接时可采用停电作业方式进行,也可采用带电作业方式进行。采用带电作业方式进行时,所述的耐张塔附近道路应满足10kV绝缘斗臂车作业要求。Preferably, the connection of the down conductor of the conductor to the insulating support rod for support and the down conductor of the DC grounding electrode can be performed by means of a power failure operation or by a live operation method. When the live operation method is used, the road near the tension tower should meet the operation requirements of the 10kV insulated bucket truck.

一种接地极线路故障模拟试验系统,包括接地极模拟试验装置和L型辅助试验装置;A grounding electrode line fault simulation test system, comprising a grounding electrode simulation test device and an L-shaped auxiliary test device;

所述L型辅助试验装置包括绝缘支撑杆和垂直导线,绝缘支撑杆一端与杆塔连接,另一端与垂直导线连接,垂直导线一端与绝缘支撑杆连接,另一端与接地极导线连接;The L-shaped auxiliary test device comprises an insulating support rod and a vertical wire, one end of the insulating support rod is connected with the tower, the other end is connected with the vertical wire, one end of the vertical wire is connected with the insulating support rod, and the other end is connected with the grounding electrode wire;

所述接地极模拟试验装置包括传动模块、动力模块、输入模块、控制模块、电流检测模块以及引弧线操作模块;The ground electrode simulation test device includes a transmission module, a power module, an input module, a control module, a current detection module and an arc-starting line operation module;

传动模块:用于把动力传输给引弧线操作模块,使得引弧线能从地面转换到L型辅助试验装置,实现接地故障的模拟;Transmission module: used to transmit power to the arc pilot line operation module, so that the arc pilot line can be converted from the ground to the L-shaped auxiliary test device to simulate ground faults;

动力模块:用于接受控制模块和输入模块的控制,给传动模块提供动力;Power module: used to accept the control of the control module and the input module, and provide power to the transmission module;

输入模块:用于接受试验输入相关信息,包括输入保护电流整定值Iset和时间整定值Tset以及高度H1;Input module: used to accept test input related information, including input protection current setting value Iset and time setting value Tset and height H1;

控制模块:用于控制引弧线操作模块,使得引弧线操作模块和直流接地极线路接触后位置相应的时间;Control module: used to control the arc-striking line operation module, so that the time corresponding to the position after the arc-striking line operation module and the DC grounding line are in contact;

引弧线操作模块:用于牵引引弧线至接地极线路,形成人工模拟接地,引弧线操作装置通常为绝缘的,一端连接引弧线,该端为S型铜片,通过螺栓与引弧线相连,另外一端连接动力装置;Arc pilot wire operation module: used to pull the arc pilot wire to the grounding electrode line to form artificial grounding. The arc pilot wire operating device is usually insulated, and one end is connected to the arc pilot wire. This end is an S-shaped copper sheet. The arcs are connected, and the other end is connected to the power unit;

电流检测模块,用于检测流过引弧线的电流,用于给控制模块判断是否实现故障的模拟。The current detection module is used to detect the current flowing through the arc-starting wire, and is used to judge whether to realize the simulation of the fault for the control module.

本发明的有益效果是:实现了直流接地极线路短路过程中时间和电流很难控制的问题,提高了接地极短路试验的成功率。The beneficial effects of the invention are as follows: the problem that time and current are difficult to control during the short circuit process of the DC ground electrode line is realized, and the success rate of the ground electrode short circuit test is improved.

附图说明Description of drawings

图1是本发明直接极线路故障系统结构示意图;1 is a schematic structural diagram of a direct pole line fault system of the present invention;

图2是本发明试验装置控制流程图。Fig. 2 is the control flow chart of the test device of the present invention.

图中:1-导线引下线,2-绝缘支撑杆,3-故障模拟引线,4-引弧线操作装置,5-S型铜片In the picture: 1- Conductor down lead, 2- Insulation support rod, 3- Fault simulation lead, 4- Arc-starting wire operating device, 5-S type copper sheet

具体实施方式Detailed ways

下面结合附图和具体实施方式,对本发明作进一步说明。The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

实施例1:如图1-2所示,一种接地极线路故障模拟试验方法,包括以下步骤:Embodiment 1: As shown in Figure 1-2, a grounding electrode line fault simulation test method includes the following steps:

Step1:根据调度要求的故障范围确定接地极线路故障模拟试验的杆塔N,通过杆塔N的塔图获取杆塔横档高度Ht和绝缘子串长度Lj,根据调度要求,模拟试验杆塔选择在换流站外第1基杆塔,为耐张塔,根据该基杆塔的图纸得到横档高度Ht为18m,绝缘子串长度Lj为0.73m。Step1: Determine the tower N of the grounding pole line fault simulation test according to the fault range required by the dispatching, obtain the tower rung height Ht and the insulator string length Lj through the tower map of the tower N, and select the tower for the simulation test outside the converter station according to the dispatching requirements. The first base tower is a tensile tower. According to the drawing of the base tower, the height Ht of the rungs is 18m, and the length Lj of the insulator string is 0.73m.

Step2:在模拟试验杆塔上安装辅助L型试验装置,支撑用的绝缘支撑杆2位置对地高度H1满足对地安全绝缘大于3m,根据第一步的杆塔图纸,选择为4m;在接地极线路上缠绕长度为0.5m,在绝缘支撑杆2上的缠绕长度为0.2m,导线引下线1的长度L3为4.7m,导线引下线1选择带透明外护套的铜线,截面积25mm2,L3=Ht-H1+Δ1+Δ2,Δ1为导线引下线1在接地极线路上缠绕的长度,Δ2为导线引下线1在绝缘支撑杆2上缠绕的长度,所述的导线引下线1通常为铜质材料,在安装辅助L型试验装置之前,在接地极线路上还安装了铝包带进行保护,宽度15cm。安装方式为停电安装。Step2: Install the auxiliary L-type test device on the simulated test tower. The height H1 of the insulating support rod 2 to the ground meets the ground safety insulation greater than 3m. According to the tower drawing in the first step, choose 4m; in the grounding pole line The length of the upper winding is 0.5m, the winding length on the insulating support rod 2 is 0.2m, the length L3 of the lead wire 1 is 4.7m, the copper wire with a transparent outer sheath is selected for the lead wire 1, and the cross-sectional area is 25mm 2 , L3=Ht-H1+Δ1+Δ2, Δ1 is the length of the downconductor 1 wound on the grounding line, Δ2 is the length of the downconductor 1 wound on the insulating support rod 2, the The lower wire 1 is usually made of copper material. Before installing the auxiliary L-shaped test device, an aluminum-clad tape is also installed on the grounding electrode line for protection, with a width of 15cm. The installation method is power failure installation.

Step3:安装接地极线路模拟试验装置;该接地极模拟试验装置包括:传动模块、动力模块、输入模块、控制模块、电流检测模块以及引弧线操作模块;Step3: Install a ground electrode circuit simulation test device; the ground electrode simulation test device includes: a transmission module, a power module, an input module, a control module, a current detection module and an arc-striking line operation module;

传动模块:用于把动力传输给引弧线操作模块,使得引弧线能从地面转换到L型辅助试验装置,实现接地故障的模拟;Transmission module: used to transmit power to the arc pilot line operation module, so that the arc pilot line can be converted from the ground to the L-shaped auxiliary test device to simulate ground faults;

动力模块:用于接受控制模块和输入模块的控制,给传动模块提供动力Power module: used to accept the control of the control module and the input module, and provide power to the transmission module

输入模块:用于接受试验输入相关信息,包括输入保护电流整定值Iset和时间整定值Tset以及高度H1;Input module: used to accept test input related information, including input protection current setting value Iset and time setting value Tset and height H1;

控制模块,用于控制引弧线操作模块,使得引弧线操作模块和直流接地极线路接触后位置相应的时间The control module is used to control the arc pilot operation module, so that the arc pilot operation module and the DC ground electrode line are in contact with the position corresponding to the time

引弧线操作模块,牵引引弧线至接地极线路,形成人工模拟接地,引弧线操作装置4通常为绝缘的,一端连接引弧线,该端为S型铜片5,通过螺栓与引弧线相连,另外一端连接动力装置。The arc-striking wire operation module pulls the arc-striking wire to the grounding electrode line to form artificial grounding. The arc-striking wire operating device 4 is usually insulated, and one end is connected to the arc-striking wire. The arcs are connected, and the other end is connected to the power unit.

电流检测模块,用于检测流过引弧线的电流,用于给控制模块判断是否实现故障的模拟;The current detection module is used to detect the current flowing through the arc-starting wire, and is used to judge whether to realize the simulation of the fault for the control module;

Step4:安装故障模拟引线3,故障模拟引线3的一端连接至杆塔接地装置,另外一端连接模拟试验装置的引弧线操作装置4;引弧线的长度L1,

Figure BDA0002492088980000041
其中k1为安全系数,取值1.1之,将引弧线一端与杆塔接地装置连接,另一端与通过引弧线操作模块实现故障模拟;该引弧线截面积为2mm2,一端连接杆塔接地装置,另一端连接引弧线。Step4: Install the fault simulation lead 3, one end of the fault simulation lead 3 is connected to the tower grounding device, and the other end is connected to the arc-striking wire operating device 4 of the simulation test device; the length of the arc-striking wire L1,
Figure BDA0002492088980000041
Among them, k1 is the safety factor, and the value is 1.1. One end of the arc pilot is connected to the tower grounding device, and the other end is connected to the arc pilot operation module to achieve fault simulation; the arc pilot line has a cross-sectional area of 2mm 2 and one end is connected to the tower grounding device. , and the other end is connected to the arc lead.

Step5:线路带电,启动接地极线路模拟试验装置,实现接地极线路接地故障模拟。Step 5: When the line is live, start the grounding electrode line simulation test device to realize the grounding fault simulation of the grounding electrode line.

在Step5启动接地极线路模拟试验装置过程中,还包括以下步骤In the process of starting the ground electrode circuit simulation test device in Step5, the following steps are also included

Step5.1:输入保护电流整定值Iset,1000A,时间整定值Tset,0.2S以及高度H1,4m;Step5.1: Input protection current setting value Iset, 1000A, time setting value Tset, 0.2S and height H1, 4m;

Step5.2;控制模块给动力模块信号,通过传动模块使得引弧线操作装置4开始上升;Step5.2: The control module sends a signal to the power module, and the arc-priming line operating device 4 starts to rise through the transmission module;

Step5.3:判断引弧线操作装置4上升的高度是否超过支撑用的绝缘支撑杆2的高度;Step5.3: Determine whether the height of the arc-starting wire operating device 4 exceeds the height of the insulating support rod 2 for support;

Step5.4:如果引弧线操作装置4上升的高度超过支撑用的绝缘支撑杆2的高度H1,则控制模块给动力模块下降信号,通过传动模块使得引弧线操作装置4开始下降,回到初始位置,给出异常信号,试验装置位置不符合要求,试验结束。Step5.4: If the rising height of the arc pilot operating device 4 exceeds the height H1 of the insulating support rod 2 for support, the control module will give the power module a descending signal, and the arc pilot operating device 4 will start to descend through the transmission module and return to The initial position, an abnormal signal is given, the position of the test device does not meet the requirements, and the test is over.

Step5.5:如果引弧线操作装置4上升高度没有超过支撑用的绝缘支撑杆2的高度,判断电流检测模块检测到的电流是是否小于0.2Iset,如果小于继续上升;Step5.5: If the rising height of the arc-striking wire operating device 4 does not exceed the height of the insulating support rod 2 for support, judge whether the current detected by the current detection module is less than 0.2Iset, and if it is less than continue to rise;

Step5.6:如果电流检测模块检测到的电流大于0.2Iset,则开始计时,并维持在该高度;Step5.6: If the current detected by the current detection module is greater than 0.2Iset, start timing and maintain it at this height;

Step5.4,如果计时超过Tset,则控制模块给动力模块下降信号,通过传动模块使得引弧线操作装置4开始下降,回到初始位置,给出信号,试验正常,试验结束。Step5.4, if the timing exceeds Tset, the control module will give a lowering signal to the power module, and through the transmission module, the arc pilot operating device 4 will start to lower, return to the initial position, and give a signal, the test is normal, and the test is over.

以上结合附图对本发明的具体实施方式作了详细说明,但是本发明并不限于上述实施方式,在本领域普通技术人员所具备的知识范围内,还可以在不脱离本发明宗旨的前提下作出各种变化。The specific embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and can also be made within the scope of knowledge possessed by those of ordinary skill in the art without departing from the spirit of the present invention. Various changes.

Claims (8)

1. A grounding electrode line fault simulation test method is characterized in that:
step1, determining a tower N of the grounding electrode line fault simulation test according to the fault range required by the dispatching, and acquiring the height Ht of a tower crosspiece and the length L j of an insulator string through a tower diagram of the tower N;
step2, mounting an auxiliary L type test device on the simulation test tower;
step 3: installing a grounding electrode circuit simulation test device;
step 4: installing a fault simulation lead, wherein one end of the fault simulation lead is connected to a tower grounding device, and the other end of the fault simulation lead is connected with an arc striking wire operating device of a simulation test device;
step 5: and (4) the circuit is electrified, and the grounding electrode circuit simulation test device is started to realize grounding electrode circuit grounding fault simulation.
2. The earth electrode line fault simulation test method of claim 1, characterized in that: and the tower N of the grounding electrode line fault simulation test in Step1 is a strain tower.
3. The method of claim 1, wherein when the auxiliary L test device is installed in Step2, the position of the insulating support rod for supporting the device is higher than the ground height H1The requirement of safe insulation to the ground is more than 3 m.
4. The method of claim 1, wherein when the auxiliary L test device is installed in Step2, the length of the down lead of the lead is L3,L3=Ht-H1+ Δ 1+ Δ 2, Δ 1 is the length that the lead downlead twined on the ground polar line, and Δ 2is the length that the lead downlead twined on the insulating support rod, the lead downlead be copper material.
5. The grounding electrode line fault simulation test method of claim 1, wherein before the Step 2is provided with the simulation test tower auxiliary L type test device, an aluminum foil tape is adopted on a grounding electrode line for winding protection, the protection range meets 3-4 times of the diameter of a vertical lead, and the width is not less than 10cm-20 cm.
6. The grounding electrode line fault simulation test method of claim 1, wherein the length of the leading arc line determined in Step4 is L1
Figure FDA0002492088970000011
Wherein k1 is a safety factor, the value range is 1.05-1.1, one end of the arc striking wire is connected with the tower grounding device, and the other end of the arc striking wire realizes fault simulation through the arc striking wire operation module;
the arc leading line is 1mm2-10mm2One end of the bare copper wire is connected with the tower grounding device, and the other end of the bare copper wire is connected with the arc leading line.
7. The earth electrode line fault simulation test method of claim 1, characterized in that: the control method of the Step5 grounding electrode circuit simulation test device comprises the following steps:
step5.1: inputting a protection current setting value Iset, a time setting value Tset and a height H1;
step5.2; the control module gives a signal to the power module, and the arc striking wire operating device starts to ascend through the transmission module;
step5.3: judging whether the rising height of the arc striking wire operating device exceeds the height of the insulating support rod for supporting or not;
step5.4: if the rising height of the arc striking line operating device exceeds the height H1 of the insulating support rod for supporting, the control module gives a descending signal to the power module, the arc striking line operating device starts to descend through the transmission module, returns to the initial position and gives an abnormal signal, the position of the test device does not meet the requirement, and the test is finished.
Step5.5: if the rising height of the arc leading line operating device does not exceed the height of the insulating supporting rod for supporting, judging whether the current detected by the current detection module is less than 0.2Iset, and if the current detected by the current detection module is less than the height of the insulating supporting rod for supporting, continuing rising;
step5.6: if the current detected by the current detection module is greater than 0.2Iset, starting timing and maintaining the timing at the height;
step5.7: if the timing exceeds Tset, the control module gives a descending signal to the power module, the arc striking wire operating device starts to descend through the transmission module, the arc striking wire operating device returns to the initial position, a signal is given, the test is normal, and the test is finished.
8. A grounding electrode circuit fault simulation test system is characterized by comprising a grounding electrode simulation test device and an L type auxiliary test device;
the L type auxiliary test device comprises an insulating support rod and a vertical lead, wherein one end of the insulating support rod is connected with a tower, the other end of the insulating support rod is connected with the vertical lead, one end of the vertical lead is connected with the insulating support rod, and the other end of the vertical lead is connected with a ground electrode lead;
the grounding electrode simulation test device comprises a transmission module, a power module, an input module, a control module, a current detection module and an arc striking wire operation module;
the transmission module is used for transmitting power to the arc leading line operation module, so that the arc leading line can be converted from the ground to an L type auxiliary test device, and the simulation of the ground fault is realized;
a power module: the control module is used for receiving the control of the control module and the input module and providing power for the transmission module;
an input module: the device is used for receiving relevant information of test input, including an input protection current setting value Iset, a time setting value Tset and a height H1;
a control module: the control module is used for controlling the arc striking line operation module to enable the arc striking line operation module to be in contact with the direct-current grounding polar line for a corresponding time;
leading an arc line operation module: the arc striking wire operating device is insulated, one end of the arc striking wire operating device is connected with the arc striking wire, the other end of the arc striking wire operating device is connected with the power device, and the S-shaped copper sheet is connected with the arc striking wire through a bolt;
and the current detection module is used for detecting the current flowing through the leading arc line and judging whether the fault simulation is realized for the control module.
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