直流电子式电压互感器阶跃响应特性现场试验方法及装置

直流电压互感器的暂态阶跃特性对直流系统控保装置至关重要,首先研究了影响直流电子式电压互感器暂态传变特性的因素,分析了阶跃响应技术参数及其试验装置性能指标要求。 基于此,提出一种直流电压互感器阶跃响应特性现场试验方法,研制出基于固态开关的阶跃电压源及试验装置,实现了陡上升、长脉宽方波电压输出和暂态信号的同步测量。 试验结果表明,提出的直流电子式电压互感器阶跃响应特性现场试验方法及装置满足标准规定要求,并在实际±500 kV 直流工程换流站开展了阶跃响应现场试验,为直流电压互感器的暂态性能测试和评估提供了技术依据。

Field test method and device for step response characteristics of DC electronic voltage transformer

The transient step characteristic of the DC voltage transformer is very important to the control and protection device of the DCsystem. In this article, firstly, the factors affecting the transient transmission characteristics of DC electronic voltage transformers arestudied. The technical parameters of step response and the performance requirements of the test device are analyzed. Based on this, afield test method for the step response characteristics of the DC voltage transformer is proposed. A step voltage source and test devicebased on a solid-state switch are developed. The synchronous measurement of steep rise, long pulse width square wave voltage output,and transient signal are realized. The test results show that the proposed field test method and device of step response characteristics ofthe DC electronic voltage transformer meet the requirements of the standard. The field test of step response is carried out in the actual ±500 kV DC project converter station, which provides a technical basis for the transient performance test and evaluation of the DC voltagetransformer.