摘要
通过对西北电网 330kV自耦变压器零序过电流保护配置和整定计算的分析和实际应用调查 ,发现其大多数不满足西北电网变压器后备保护第Ⅰ段最后一级 (跳三侧 )动作时限 ≤2s的反措要求 ,并且部分 330kV自耦变压器零序过电流保护的方向指向、保护范围、定值取法等不利于系统安全稳定运行 ,从而提出了既能较短时限动作切除保护范围内故障又不失去选择性 ,适合西北电网特点的 330kV自耦变压器零序过电流保护的配置及整定计算方法。
Based on the analysis and application investigation of zero-sequence over-current protection configuration and setting calculation for 330 kV autotransformer of northwest power network,the following facts have been found.The tripping time of most transformer's back-up protections at final stage of first section(tripping at three sides)is not satisfied with the requirement of less than 2 seconds.The direction,bound and setting of some 330 kV autotransformer's zero-sequence over-current protections have adverse effects on the stable system operation.The configuration and setting calculation principles suitable for northwest power Network are presented,which can isolate fault in shorter time without losing selectivity.
出处
《电力自动化设备》
EI
CSCD
北大核心
2001年第9期29-31,共3页
Electric Power Automation Equipment
