浅述风电场集电系统接地改造后零序保护定值计算

Discussion on the Calculation of Zero Sequence Protection Setting after Grounding Transformation of Wind Farm Collecting System

单相接地占配网故障的80%,而中性点接地方式决定了单相接地故障的处理流程,对供电可靠性有决定性影响。本文以舟山岑港风电场为例介绍集电系统由经消弧线圈接地改为经电阻接地方式后保护定值的整定计算。

Single-phase-to-ground fault accounts for 80%of distribution network faults,and neutral grounding determines the processing flow of single-phase-to-ground fault,which has a decisive impact on power supply reliability.Taking cengang wind farm in Zhoushan as an example,this paper introduces the setting calculation of protection setting value of collecting power system after changing from grounding by arc suppression coil to grounding by resistance.