溪洛渡送电广东直流输电工程直流线路故障时的控制保护策略分析

Abstract

与常规直流输电工程相比，同塔双回线路的电感电容参数发生了较大变化，从而导致故障时的电气量也发生了变化。文章分析了同塔双回直流输电线路故障特点及其常见故障,与常规直流工程进行了对比,介绍了溪洛渡送电广东直流输电工程直流保护策略及其故障时的恢复策略，给出了同塔双回直流工程在保护判据选取和定值设定方面的一些建议。 Great changes have taken place in the inductance and capacitance of double-circuit transmission line on the same tower compared with conventional HVDC project, then electric parameter also changed. This paper analyzed the fault characteristics and usual faults of double-circuit transmission line on the same tower, and compared with conventional DC engineering, this paper also introduces the DC protection strategy and its failure recovery strategy of Xiluo-du-Guangdong HVDC project, some suggestions are given about protection criterion selection and setting value set of double-circuit transmission line on the same tower.