摘要
某厂区位于广东电网末端,当高压直流输电系统单极大地返回运行时,导致该厂区电厂主变压器中性点流过直流电流。为了抑制高压直流输电系统单极大地返回运行引起的电厂主变压器直流偏磁问题,对该厂区近区交流系统直流电流分布模型进行了分析,计算了变压器直流偏磁电流并分析了直流偏磁的影响因素,通过直流偏磁抑制措施比较,推荐该厂区6台主变压器均加装隔直装置,避免对变压器本体的影响。
Some plant area is located at the edge of Guangdong power grid.When the high-voltage direct current transmission system returns to ground operation,direct current flows through the neutral point of the main transformer of the plant area.In order to develop the effective DC bias suppression measures for the main transformer of the power plant when HVDC is running in monopole to ground operation,it is necessary to study and improve the DC current distribution model of the AC power system,calculate the DC bias current of transformers,analyze all kinds of DC bias influence factors,and compare various DC bias suppression measures and methods.It is recommended that the six main transformers in the plant area should be installed with DC isolating device to avoid the influence on the transforemers.
作者
李吉生
LI Jisheng(Daya Bay Nuclear Power Operations And Management Co.,Ltd.,Shenzhen 518124,China)
出处
《内蒙古电力技术》
2021年第1期85-88,共4页
Inner Mongolia Electric Power
关键词
直流输电
直流偏磁
直流电流分布模型
影响因素
抑制措施
DC transmission
DC bias
DC current distribution model
influence factors
suppression measures
