一种局部放电系统信号单元电路设计及测试

A signal unit circuit of partial discharge system is designed and tested

为了降低电力系统局部放电造成的损耗,设计了一种局部放电系统信号单元电路设计及其实验测试。利用ACDCA引脚产生高低电平来实现对三极管导通状态的调控,根据继电器开关状态确定直流或交流的耦合电路。利用ATTA引脚来产生高低电平,从而对三极管的导通状态进行口控制,并调整继电器开关来达到不同的衰减程度。研究结果表明,通过FPGA技术对局部放电测试系统进行处理可以调节A/D转换模块的放电信号分析,并实现对数据信息的快速采集与提取。在很长测试区间内,采用局部放电测试系统都可以实现良好可重复性。

in order to reduce the loss caused by partial discharge in power system, a signal unit circuit of partial discharge system was designed and tested.ACDCA pin is used to generate high and low level to realize the regulation of the on-off state of the transistor, and the coupling circuit of dc or ac is determined according to the switch state of relay.ATTA pin is used to generate the high and low level, so as to control the on-off state of the transistor and adjust the relay switch to achieve different attenuation.The results show that the discharge signal analysis of A/D conversion module can be adjusted by processing partial discharge test system with FPGA technology, and the data information can be collected and extracted quickly.In a long test range, the pd test system can achieve good repeatability.