高压开关用电阻绝缘与能量吸收试验研究
2024-06-21姜珊盼宋继光李阳黄帅印张万德李光华
姜珊盼 宋继光 李阳 黄帅印 张万德 李光华



摘 要:【目的】电网中越来越多的超特高压开关采用在断口两侧并联电阻的方式来抑制操作过程中产生的过电压。为了在型式试验中考核超特高压开关用电阻的电性能,需要对电阻的绝缘耐受能力和能量吸收试验进行研究。【方法】运用二阶电路的非震荡放电原理,设计电容充电和电阻放电试验回路,通过调节回路的充电电压、回路电容、回路电抗来进行不同阻值电阻的试验。【结果】根据纯阻性的断路器合闸电阻的电性能测试要求,提出了针对合闸电阻冲击耐受电压试验的冲击发生电路形式和能量吸收试验的冲击电流发生回路。【结论】该设计的试验回路可以验证电阻雷电冲击、操作冲击、能量吸收试验,有效地考核了高压开关用电阻的性能。
关键词:电阻;电压耐受;能量吸收;试验回路
中图分类号:TM832 文献标志码:A 文章编号:1003-5168(2024)08-0005-04
DOI:10.19968/j.cnki.hnkj.1003-5168.2024.08.001
Experimental Study on Resistance Insulation and Energy Absorption for High Voltage Switch
JIANG Shanpan1 SONG jiguang2 LI Yang1 HUANG Shuaiyin1
ZHANG Wande1 LI Guanghua1
(1.Henan High Voltage Apparatus Research Institute Co., Ltd., Pingdingshan 467001, China;
2.Pinggao Group Co., Ltd., Pingdingshan 467001, China)
Abstract: [Purposes] More and more Ultra-high switches in theelectric fence adopt parallel resistors on both sides of the fracture surface to restrain the over-voltage during operation. In order to evaluate the electrical performance of the resistance for ultra-high voltage switch in the type test, it is necessary to study the insulation tolerance and energy absorption test of the resistance.[Methods] According to the non-oscillatory discharge test principle of the second-order circuit, the capacitance charge and resistance discharge test circuits are designed, and the test of different resistance resistances is carried out by adjusting the charging voltage, capacitance and reactance of the circuit. [Findings] According to the requirement of the circuit breaker pure resistance closing resistance test, the impulse generating circuit form for the impulse withstand voltage test of the closing resistor and the impulse current generating circuit for the energy absorption test are proposed. [Conclusions] The test circuit designed in this paper can validate the ability of resistance lightning impulse, working impulse and capacity absorption test, and effectively test the performance of high voltage switch resistor.
Keywords: resistance; voltage tolerance; energy absorption; test loop
0 引言
高压开关用电阻是断路器的一部分。如图1所示,在断路器合闸过程中,在断路器主触头闭合前可按预定的时间投入电阻R,并与波阻抗为Z的输电线路串联[1]。当电网中线路过长时,如果仅使用避雷器,那么在重合闸操作时可能会出现过电压较高的情况,因此利用断路器组装的合闸电阻具有更可靠的保护效果。通过利用电阻将电网中的部分电能吸收转化为热能,可以达到削弱电磁振荡、限制过电压的目的[2-5]。
高压开关用电阻试验的相关标准见表1[6-8]。国内外关于电阻片的试验研究鲜有报道,国外针对电阻片的型式试验主要是由电阻片生产厂家自行完成;……
