WO2023142339A1 - 一种gil/gis局部放电高频电流传播的模拟装置 - Google Patents

一种gil/gis局部放电高频电流传播的模拟装置 Download PDF

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WO2023142339A1
WO2023142339A1 PCT/CN2022/099119 CN2022099119W WO2023142339A1 WO 2023142339 A1 WO2023142339 A1 WO 2023142339A1 CN 2022099119 W CN2022099119 W CN 2022099119W WO 2023142339 A1 WO2023142339 A1 WO 2023142339A1
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frequency current
gil
metal support
partial discharge
simulation device
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PCT/CN2022/099119
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English (en)
French (fr)
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赵科
马径坦
杨景刚
黄强
刘建军
高山
陈少波
李洪涛
徐阳
张照辉
李玉杰
孙蓉
刘咏飞
肖焓艳
庄添鑫
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国网江苏省电力有限公司电力科学研究院
国网江苏省电力有限公司
江苏省电力试验研究院有限公司
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Publication of WO2023142339A1 publication Critical patent/WO2023142339A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation

Definitions

  • the present application relates to the technical field of partial discharge high-frequency current simulation, in particular to a simulation device for GIL/GIS partial discharge high-frequency current propagation.
  • Gas-insulated metal-enclosed combined electrical appliances Gas Insulated Switchgear, GIS
  • gas-insulated transmission lines Gas Insulated-transmission Line, GIL
  • GIS Gas-insulated Switchgear
  • GIL gas-insulated transmission lines
  • the volume of the GIL/GIS test section generally used for experimental research is limited, and it is difficult to simulate the propagation of partial discharge high-frequency current signals in the long-distance GIL/GIS, and the cost of using a large-volume, long-distance test section is very high.
  • This application discloses a simulation device for GIL/GIS partial discharge high-frequency current propagation to solve the problem that in the prior art, the volume of the GIL/GIS test section generally used for experimental research is limited, and it is difficult to simulate long-distance GIL/GIS. Propagation of partial discharge high-frequency current signals, and the use of large-volume, long-distance test sections is a high-cost technical problem.
  • This application discloses a GIL/GIS partial discharge high-frequency current propagation simulation device, including bushing, bus cavity, adjustable impedance, first metal bracket, second metal bracket, third metal bracket and high-frequency current sensor ;
  • the bushing is connected to the busbar cavity, the busbar cavity is provided with a conductor inside, and the busbar cavity is provided with a plurality of inflation and deflation ports;
  • the first metal bracket and the second metal bracket are arranged at the grounding point of the busbar cavity and separated by insulating brackets, and the adjustable impedance is connected in series with the first metal bracket and the second metal bracket through wires. Between the two metal supports; one end of the third metal support is connected to the second metal support, and the other end is connected to the ground grid;
  • the high-frequency current sensor is sheathed on the wire.
  • the adjustable impedance is an adjustable resistance and an adjustable inductance connected in series, the adjustable resistance is connected to the first metal support, and the adjustable inductance is connected to the second metal support.
  • the bushing and the busbar cavity are connected to each other through a flange.
  • the busbar cavity includes a plurality of air chambers.
  • an insulator is provided at the connection of the air chamber.
  • the inflation and deflation ports are arranged on the side of the air chamber.
  • the bushing is connected to a power frequency experimental transformer without partial discharge.
  • a plurality of pulleys are arranged at the bottom of the third metal bracket.
  • the adjustable resistor is a non-wire wound potentiometer.
  • the adjustable inductance is a coil that can change the position of the iron core.
  • This application relates to the technical field of partial discharge high-frequency current simulation, and discloses a GIL/GIS partial discharge high-frequency current propagation simulation device, including a bushing, a bus cavity, adjustable impedance, a first metal bracket, and a second metal bracket , the third metal bracket and the high-frequency current sensor.
  • the first metal bracket and the second metal bracket are separated by an insulating bracket.
  • One end of the third metal bracket is connected to the second metal bracket, and the other end is connected to the ground grid.
  • the adjustable impedance is composed of an adjustable resistance and an adjustable inductance in series. The adjustable impedance passes through The wires are connected in series between the first metal support and the second metal support.
  • This application adopts the structure of adjusting the impedance in series at the metal bracket of the grounding point to equivalent the impedance of the long-distance GIL/GIS shell.
  • the high-frequency current passes through the adjustable impedance, which is equivalent to passing through the GIL/GIS shell with the equivalent length of the impedance, so as to achieve the purpose of simulating the long-distance GIL/GIS partial discharge high-frequency current propagation, which is simple Fast, save time and cost.
  • Fig. 1 is a schematic structural diagram of a GIL/GIS partial discharge high-frequency current propagation simulation device disclosed in an embodiment of the present application;
  • Fig. 2 is a schematic structural diagram of adjustable impedance in a GIL/GIS partial discharge high-frequency current propagation simulation device disclosed in an embodiment of the present application.
  • this application discloses a simulation device for GIL/GIS partial discharge high-frequency current propagation through the following embodiments.
  • FIG. 1 it is a schematic structural diagram of a GIL/GIS partial discharge high-frequency current propagation simulation device provided by the embodiment of the present application.
  • the GIL/GIS partial discharge high-frequency current propagation simulation device includes a bushing 1, a bus cavity Body 14 , adjustable impedance 11 , first metal bracket 6 , second metal bracket 8 , third metal bracket 9 and high frequency current sensor 13 .
  • the bushing 1 is connected to the busbar cavity 14, the busbar cavity 14 is provided with a conductor 3 inside, and the busbar cavity 14 is provided with a plurality of charging and discharging ports 5, wherein the conductor 3 is used to transmit electric current.
  • the first metal bracket 6 and the second metal bracket 8 are arranged at the grounding point of the bus cavity 14 and separated by an insulating bracket 7, and the adjustable impedance 11 is connected in series with the wire 12 Between the first metal bracket 6 and the second metal bracket 8 .
  • One end of the third metal support 9 is connected to the second metal support 8 , and the other end is connected to the ground grid.
  • the high frequency current sensor 13 is sheathed on the wire 12 . Specifically, the high-frequency current sensor 13 is sleeved on the wire 12 connected to the adjustable impedance 11 at the ground point for measuring high-frequency current signals generated by partial discharge.
  • the adjustable impedance 11 is an adjustable resistance 111 and an adjustable inductance 112 connected in series, the adjustable resistance 111 is connected to the first metal support 6 , the The adjustable inductance 112 is connected to the second metal support 8, specifically, one end of the adjustable resistor 111 is connected to the first metal support 6, and the other end is connected to the adjustable inductance 112, and the other end of the adjustable inductance 112 is connected to the second metal support 8.
  • the adjustable resistance range is 0-5 ⁇
  • the adjustable inductance range is 0-5 ⁇ H.
  • the bushing 1 and the busbar cavity 14 are connected to each other through a flange 2 .
  • the busbar cavity 14 includes a plurality of air chambers.
  • an insulator 4 is provided at the connection of the gas chambers to separate the gas chambers.
  • the inflation and deflation ports 5 are arranged on the side of each air chamber.
  • the bushing 1 is connected to a power frequency experimental transformer without partial discharge for powering the simulation device.
  • a plurality of pulleys 10 are arranged at the bottom of the third metal bracket 9 .
  • the adjustable resistor 111 is a non-wire-wound potentiometer, and the resistance value can be changed by rotating the shaft of the potentiometer.
  • the adjustable inductance 112 is a coil whose iron core position can be changed, and the inductance value can be changed by adjusting the iron core position.
  • a GIL/GIS partial discharge high-frequency current propagation simulation device includes a bushing, a bus cavity, an adjustable impedance, a first metal bracket, a second metal bracket, and a third metal bracket. bracket and high frequency current sensor.
  • the first metal bracket and the second metal bracket are separated by an insulating bracket.
  • One end of the third metal bracket is connected to the second metal bracket, and the other end is connected to the ground grid.
  • the adjustable impedance is composed of an adjustable resistance and an adjustable inductance in series. The adjustable impedance passes through The wires are connected in series between the first metal support and the second metal support.
  • This application adopts the structure of adjusting the impedance in series at the metal bracket of the grounding point to equivalent the impedance of the long-distance GIL/GIS shell.
  • the high-frequency current passes through the adjustable impedance, which is equivalent to passing through the GIL/GIS shell with the equivalent length of the impedance, so as to achieve the purpose of simulating the long-distance GIL/GIS partial discharge high-frequency current propagation, which is simple Fast, save time and cost.
  • the first step is to arrange insulation defects in the busbar cavity 14 .
  • the second step is to select the location and quantity of grounding points, and connect the adjustable impedance 11 in series between the first metal bracket 6 and the second metal bracket 8 with a wire 12, and the first metal bracket 6 and the second metal bracket between the remaining grounding points 8 There is no wire connection in the middle, keep it disconnected.
  • the third step is to connect the vacuum pump to the device's gas charging and discharging port, vacuumize the simulation device, and then fill it with SF6 gas.
  • the fourth step is to pressurize the simulation device by connecting the bushing of the non-PD experimental transformer.
  • the fifth step is to use a high-frequency current sensor to measure the high-frequency current signal.
  • the sixth step is to turn off the power, adjust the impedance, simulate the propagation of high-frequency current in GIL/GIS, and repeat the fourth and fifth steps.

Abstract

本申请涉及局部放电高频电流模拟技术领域，公开了一种GIL/GIS局部放电高频电流传播的模拟装置，包括套管、母线腔体、可调阻抗、第一金属支架、第二金属支架、第三金属支架和高频电流传感器。第一金属支架和第二金属支架由绝缘支架隔开，第三金属支架一端连接第二金属支架，另一端连接地网，可调阻抗由可调电阻和可调电感串联组成，可调阻抗通过导线串联至第一金属支架和第二金属支架之间。本申请采用在接地点金属支架处串联可调阻抗的结构，来等效长距离GIL/GIS外壳的阻抗，可以模拟局部放电高频电流在GIL/GIS内的传播特性，具有结构简单，可操作性强的优点。

Description

一种GIL/GIS局部放电高频电流传播的模拟装置 技术领域
本申请涉及局部放电高频电流模拟技术领域，尤其涉及一种GIL/GIS局部放电高频电流传播的模拟装置。
背景技术
气体绝缘金属封闭组合电器(Gas Insulated Switchgear，GIS)和气体绝缘输电线路(Gas Insulated-transmission Line，GIL)具有占地面积少、体积小、可靠性高及维护简单等优点，被广泛应用于城市电网、发电厂和大型厂矿企业等高压输变电系统中。随着电力系统的发展，越来越多的长距离GIL/GIS被应用于输变电领域。
在GIS/GIL出厂、运输、运行过程中不可避免会形成一些绝缘缺陷，导致局部电场畸变，当电场强度达到击穿场强时，设备内部就会发生局部放电。高频电流法作为一种易于操作的局部放电检测技术，在现场具有很好的应用前景。高频电流在传播过程中的衰减对检测的有效性影响很大，因此有必要对高频电流在GIL/GIS中的传播特性进行研究。
目前，一般用于实验研究的GIL/GIS试验段的体积有限，很难模拟长距离GIL/GIS内局部放电高频电流信号的传播，而采用大体积、长距离的试验段成本很高。
发明内容
本申请公开了一种GIL/GIS局部放电高频电流传播的模拟装置，以解决现有技术中，一般用于实验研究的GIL/GIS试验段的体积有限，很难模拟长距离GIL/GIS内局部放电高频电流信号的传播，而采用大体积、长距离的试验段成本很高的技术问题。
本申请公开了一种GIL/GIS局部放电高频电流传播的模拟装置，包括套管、母线腔体、可调阻抗、第一金属支架、第二金属支架、第三金属支架和高频电流传感器；
所述套管连接所述母线腔体，所述母线腔体内部设置有导体，所述母线腔体设置有多个充放气口；
所述第一金属支架和所述第二金属支架设置在所述母线腔体的接地点位置处，且通过绝缘支架隔开，所述可调阻抗通过导线串联在所述第一金属支架和第二金属支架之间；所述第三金属支架的一端连接所述第二金属支架，另一端连接地网；
所述高频电流传感器套设在所述导线上。
可选的，所述可调阻抗为相互串联的可调电阻和可调电感，所述可调电阻连接所述第一金属支架，所述可调电感连接所述第二金属支架。
可选的，所述套管和母线腔体之间通过法兰相互连接。
可选的，所述母线腔体包括多个气室。
可选的，在所述气室的连接处设置有绝缘子。
可选的，所述充放气口设置在气室的侧面。
可选的，所述套管连接无局放工频实验变压器。
可选的，在所述第三金属支架的底部设置有多个滑轮。
可选的，所述可调电阻为非线绕电位器。
可选的，所述可调电感为可改变铁心位置的线圈。
本申请涉及局部放电高频电流模拟技术领域，公开了一种GIL/GIS局部放电高频电流传播的模拟装置，包括套管、母线腔体、可调阻抗、第一金属支架、第二金属支架、第三金属支架和高频电流传感器。第一金属支架和第二金属支架由绝缘支架隔开，第三金属支架一端连接第二金属支架，另一端连接地网，可调阻抗由可调电阻和可调电感串联组成，可调阻抗通过导线串联至第一金属支架和第二金属支架之间。本申请采用在接地点金属支架处串联可调阻抗的结构，来等效长距离GIL/GIS外壳的阻抗。当母线腔体内产生局部放电时，高频电流经过可调阻抗相当于经过该与该阻抗等效长度的GIL/GIS外壳，从而达到模拟长距离GIL/GIS局部放电高频电流传播的目的，简单快捷，节约时间和成本。
附图说明
为了更清楚地说明本申请的技术方案，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，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例公开的一种GIL/GIS局部放电高频电流传播的模拟装置的结构示意图；
图2为为本申请实施例公开的一种GIL/GIS局部放电高频电流传播的模拟装置中，可调阻抗的结构示意图。
图示说明：
其中，1-套管；2-法兰；3-导体；4-绝缘子；5-充放气口；6-第一金属支架；7-绝缘支架；8-第二金属支架；9-第三金属支架；10-滑轮；11-可调阻抗；111-可调电阻；112-可调电感；12-导线；13-高频电流传感器。
具体实施方式
为了解决现有技术中，一般用于实验研究的GIL/GIS试验段的体积有限，很难模拟长距离GIL/GIS内局部放电高频电流信号的传播，而采用大体积、长距离的试验段成本很高的技术问题，本申请通过如下实施例公开了一种GIL/GIS局部放电高频电流传播的模拟装置。
参见图1，为本申请实施例提供的一种GIL/GIS局部放电高频电流传播的模拟装置的结构示意图，所述GIL/GIS局部放电高频电流传播的模拟装置包括套管1、母线腔体14、可调阻抗11、第一金属支架6、第二金属支架8、第三金属支架9和高频电流传感器13。
所述套管1连接所述母线腔体14，所述母线腔体14内部设置有导体3，所述母线腔体14设置有多个充放气口5，其中，导体3用于传输电流。
所述第一金属支架6和所述第二金属支架8设置在所述母线腔体14的接地点位置处，且 通过绝缘支架7隔开，所述可调阻抗11通过导线12串联在所述第一金属支架6和第二金属支架8之间。所述第三金属支架9的一端连接所述第二金属支架8，另一端连接地网。
所述高频电流传感器13套设在所述导线12上。具体来说，高频电流传感器13套设在接地点位置处连接可调阻抗11的导线12上，用于测量局部放电产生的高频电流信号。
选择在母线腔体14两端的两个接地点处的第一金属支架6和第二金属支架8之间串联可调阻抗11，模拟腔体两侧分别延长了与可调阻抗11数值等效的壳体长度，将高频电流传感器13套在图示位置，可得高频电流在长距离GIL/GIS中的传播特性。通过控制可调阻抗的大小和数量，可以模拟高频电流在长距离GIL/GIS中的传播。
在本申请的部分实施例中，参见图2，所述可调阻抗11为相互串联的可调电阻111和可调电感112，所述可调电阻111连接所述第一金属支架6，所述可调电感112连接所述第二金属支架8，具体来说，可调电阻111的一端连接第一金属支架6，另一端，连接可调电感112，可调电感112另一端连接第二金属支架8，可调电阻范围为0-5Ω，可调电感范围为0-5μH。
在本申请的部分实施例中，所述套管1和母线腔体14之间通过法兰2相互连接。
在本申请的部分实施例中，所述母线腔体14包括多个气室。
在本申请的部分实施例中，在所述气室的连接处设置有绝缘子4，用于分隔气室。
在本申请的部分实施例中，所述充放气口5设置在每个气室的侧面。
在本申请的部分实施例中，所述套管1连接无局放工频实验变压器，用于为模拟装置供电。
在本申请的部分实施例中，在所述第三金属支架9的底部设置有多个滑轮10。
在本申请的部分实施例中，所述可调电阻111为非线绕电位器，通过旋转电位器轴，改变阻值。
在本申请的部分实施例中，所述可调电感112为可改变铁心位置的线圈，通过调节铁心位置，改变电感值。
由以上技术方案可知，本申请公开的一种GIL/GIS局部放电高频电流传播的模拟装置，包括套管、母线腔体、可调阻抗、第一金属支架、第二金属支架、第三金属支架和高频电流传感器。第一金属支架和第二金属支架由绝缘支架隔开，第三金属支架一端连接第二金属支架，另一端连接地网，可调阻抗由可调电阻和可调电感串联组成，可调阻抗通过导线串联至第一金属支架和第二金属支架之间。本申请采用在接地点金属支架处串联可调阻抗的结构，来等效长距离GIL/GIS外壳的阻抗。当母线腔体内产生局部放电时，高频电流经过可调阻抗相当于经过该与该阻抗等效长度的GIL/GIS外壳，从而达到模拟长距离GIL/GIS局部放电高频电流传播的目的，简单快捷，节约时间和成本。
在实际应用过程中，第一步在母线腔体14内布置绝缘缺陷。第二步选择接地点位置和数量，用导线12将可调阻抗11串联至第一金属支架6和第二金属支架8之间，其余接地点之间的第一金属支架6和第二金属支架8中间无导线连接，保持断开。第三步将真空泵连接至装置充、放气口，将模拟装置抽真空，再充入SF6气体。第四步将无局放实验变压器连接套管给模拟装置加压。第五步采用高频电流传感器测量高频电流信号。第六步关闭电源，调节 阻抗大小，模拟高频电流在GIL/GIS中的传播，并重复第四步和第五步。
以上结合具体实施方式和范例性实例对本申请进行了详细说明，不过这些说明并不能理解为对本申请的限制。本领域技术人员理解，在不偏离本申请精神和范围的情况下，可以对本申请技术方案及其实施方式进行多种等价替换、修饰或改进，这些均落入本申请的范围内。本申请的保护范围以所附权利要求为准。

Claims (10)

  1. 一种GIL/GIS局部放电高频电流传播的模拟装置，其特征在于，包括套管(1)、母线腔体(14)、可调阻抗(11)、第一金属支架(6)、第二金属支架(8)、第三金属支架(9)和高频电流传感器(13)；
    所述套管(1)连接所述母线腔体(14)，所述母线腔体(14)内部设置有导体(3)，所述母线腔体(14)设置有多个充放气口(5)；
    所述第一金属支架(6)和所述第二金属支架(8)设置在所述母线腔体(14)的接地点位置处，且通过绝缘支架(7)隔开，所述可调阻抗(11)通过导线(12)串联在所述第一金属支架(6)和第二金属支架(8)之间；所述第三金属支架(9)的一端连接所述第二金属支架(8)，另一端连接地网；
    所述高频电流传感器(13)套设在所述导线(12)上。
  2. 根据权利要求1所述的GIL/GIS局部放电高频电流传播的模拟装置，其特征在于，所述可调阻抗(11)为相互串联的可调电阻(111)和可调电感(112)，所述可调电阻(111)连接所述第一金属支架(6)，所述可调电感(112)连接所述第二金属支架(8)。
  3. 根据权利要求1所述的GIL/GIS局部放电高频电流传播的模拟装置，其特征在于，所述套管(1)和母线腔体(14)之间通过法兰(2)相互连接。
  4. 根据权利要求1所述的GIL/GIS局部放电高频电流传播的模拟装置，其特征在于，所述母线腔体(14)包括多个气室。
  5. 根据权利要求4所述的GIL/GIS局部放电高频电流传播的模拟装置，其特征在于，在所述气室的连接处设置有绝缘子(4)。
  6. 根据权利要求1所述的GIL/GIS局部放电高频电流传播的模拟装置，其特征在于，所述充放气口(5)设置在气室的侧面。
  7. 根据权利要求1所述的GIL/GIS局部放电高频电流传播的模拟装置，其特征在于，所述套管(1)连接无局放工频实验变压器。
  8. 根据权利要求1所述的GIL/GIS局部放电高频电流传播的模拟装置，其特征在于，在所述第三金属支架(9)的底部设置有多个滑轮(10)。
  9. 根据权利要求2所述的GIL/GIS局部放电高频电流传播的模拟装置，其特征在于，所述可调电阻(111)为非线绕电位器。
  10. 根据权利要求2所述的GIL/GIS局部放电高频电流传播的模拟装置，其特征在于，所述可调电感(112)为可改变铁心位置的线圈。
PCT/CN2022/099119 2022-01-28 2022-06-16 一种gil/gis局部放电高频电流传播的模拟装置 WO2023142339A1 (zh)

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CN114594348A (zh) * 2022-01-28 2022-06-07 国网江苏省电力有限公司电力科学研究院 一种gil/gis局部放电高频电流传播的模拟装置

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