高压直流开断试验回路等价性

Equivalence of Synthetic Test Circuit on HVDC Interruption

本文针对电容储能高压直流开断试验回路的等价性展开讨论,提出了最佳等价时延t_(ds)和最佳开断时延t_(dp)概念;并认为如果选择f≤1/(K′t)(K′=10～25),同时控制t_(ds)≤t_d≤t_(dp),则开断电流的等价性较好。试验回路的等价性还表现在电流零点附近的物理过程和恢复电压的初始部分。

Camparing interrupting test with field test, this paper discusses equivalent conditions on synthetic test circuit for HVDC interruption with capacitive energy storage. The effects of frequency of simulating DC oscillation and various time, at which commutation switch opens, on the interrupting current are studied. Concept of optimal equivalency time tdc and optimal interruption time tdp are described. The synthetic test circuit with f≤1/ (K't0) (K'' = 10-25) and(?) , is recognized to be equivalent to the real circuit. Nice equivalence of test circuit manifests in the initial part of recovery voltage and the physical process near current zero as well.