用于60Hz电力系统的高压直流换流阀运行试验等效方法

为保证高压直流(HVDC)工程能够可靠运行,必须进行换流阀运行试验,而运行试验回路工作频率受制于电力系统的频率,如何对不同频率下的产品进行试验是亟待解决的问题。为满足60Hz电力系统的换流阀运行试验要求,以西安高压电器研究院50Hz频率的换流阀运行试验回路为基础,对换流阀的最小单元晶闸管级的结构、运行中各种过程、晶闸管级承受的电流和电压等电气参数及损耗特性进行了研究和比较,提出了进行60Hz换流阀运行试验的等效方法和折算系数。研究结果表明,在1种运行试验回路上进行不同频率的换流阀运行试验的方法可行,但需要根据不同的试验项目进行适当等效折算,以达到试验检测的目的。该方法的提出可为在世界范围内适用不同频率的直流输电工程的研究、检测等工作提供指导和参考的作用。

Equivalent Method of Operational Test for HVDC Thyristor Valve Used in 60 Hz Electric Power Systems

To ensure reliable operation of the high voltage direct current(HVDC) projects,operational tests of thyristor valves must be carried out.As the operating frequency is subject to the power system frequency,how to test products at different frequency is a serious problem.Adopting the Xi’an High Voltage Apparatus Research Institute(XIHARI) 50 Hz operational test circuit as a basis for meeting the requirements of operational test for valves in 60 Hz system,we studied and compared the current,voltage,other electrical parameters and the loss characteristics of the valves,and proposed an equivalent method and the equivalent parameters of operational test for valves in 60 Hz system by a 50 Hz test circuit.The results show that it is feasible to test a converter valve in different frequency synthetic operational test circuits,but appropriate equivalent is needed for different test items.The equivalent method provides a reference for research and test of the HVDC systems in different frequencies.