林奕夫,叶兆平,陈雪,叶昶,郑书生,曾行毅
LIN Yifu,YE Zhaoping,CHEN Xue,YE Chang,ZHENG Shusheng,ZENG Xingyi

• 1:国网福建省电力有限公司
• 2:新能源电力系统国家重点实验室(华北电力大学)
• 3:国网福建省电力有限公司武夷山市供电公司

摘要(Abstract)：

为了实现高压开关柜局部放电脉冲的高灵敏度带电检测，提出一种基于二阶电路的开关柜局部放电检测方法。首先，构建了包含带电显示装置与检测阻抗的脉冲检测电路，并测量分析了传感、显示单元的电气参数；然后，提出了适用于带电检测的二阶电路，研究了二阶电路以及带电显示装置的电容、电感参数对安全可靠性和检测灵敏度的影响；最后，利用一台10 kV铠装式开关柜与带电显示装置对该方法进行了测试。结果表明：二阶电路检测阻抗不影响开关柜与带电显示装置的安全运行，其检测灵敏度是安装在开关柜接地线上高频CT（电流互感器）的1.6倍。
To achieve high-sensitivity live detection for partial discharge(PD) pulses in high-voltage switch cabinets, a detection method based on a second-order circuit is proposed. Firstly, a pulse detection circuit that includes a charged display device and a detection impedance is constructed, and then the electrical parameters of the sensing and display units are measured and analyzed. Subsequently, a second-order circuit suitable for live detection is introduced, and the impact of second-order circuit, capacitance, and inductance parameters of the charged display device on safety, reliability and detection sensitivity is studied. Finally, a test is carried out on the proposed method using a 10 kV metal-clad switchgear and a charged display device. The results reveal that the detection impedance of the second-order circuit does not undermine the safe operation of the switchgear and the charged display device.Its detection sensitivity is 1.6 times that of the high-frequency current transformer mounted on the earth wire of the switchgear.

关键词(KeyWords)： 开关柜;局部放电;带电显示装置;二阶电路;检测阻抗
switch cabinet;partial discharge;charged display device;second-order circuit;detection impedance

Abstract:

Keywords:

基金项目(Foundation): 国家电网有限公司科技项目（52130021004Z）

作者(Author): 林奕夫,叶兆平,陈雪,叶昶,郑书生,曾行毅
LIN Yifu,YE Zhaoping,CHEN Xue,YE Chang,ZHENG Shusheng,ZENG Xingyi

DOI: 10.19585/j.zjdl.202408013

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