摘要
500 k V响沙湾变电站3号主变压器投运前进行保护向量测试,将主变压器500 k V侧及220 k V侧分别接带电容负荷,利用高精度相位表测量出各侧(包括公共绕组)实际二次电流幅值、相角值。与之前保护计算值比对分析,并结合各保护装置的采样、差流显示值,确认3号主变压器保护比率差动、分侧差动及母线差动保护向量的正确性。
Before No.3 main transformer of 500 kV Xiangshawan Substation put into operation, protection phasor test is carried out to measure the amplitude and phase angle with phase meter on the side of 500 kV and 220 kV. Compare with the previous calculated value, and combine with the sample and the uneven flow value of different prodection device to determine the correctness of the prodection ratio differential, side differential and busbar differential of No.3 main transformer.
出处
《内蒙古电力技术》
2015年第1期86-89,共4页
Inner Mongolia Electric Power
关键词
500KV自耦变压器
保护向量测试
变压器保护
比率差动保护
分侧差动保护
母线差动保护
500 kV autotransformer
protection phasor test
transformer protection
ratio differential protection
side differential protection
busbar differential protection
