摘要
根据大型船舶电力系统的特殊情况,对大容量变压器的预充磁技术进行了深入分析。根据大容量变压器空载合闸时励磁涌流的特点,分析比较各种抑制励磁电流方法,提出适用于大型船舶电力系统中的预充磁方案。对于串联电阻和利用小容量变压器预充磁两种方案,利用EMTP建立了详细的仿真模型。仿真结果表明,当分别选用合适的电阻大小或合闸时间后,上述两种预充磁方案都能有效抑制励磁电流的大小,适合应用于大型船舶电力系统。
This paper focuses on the pre-magnetizing methods, which are used to restrain the inrush current for the large capacity transformer in marine power system. Considering characteristics of inrush current when large-capacity transformers no-load close, all kinds of pre-magnetizing schemes are discussed and analyzed, based on which the pre-magnetizing schemes for large marine power system are proposed. The detailed simulation models of two suitable pre-magnetizing strategies such as the series resistance method and the small pre-magnetized transformer method are built by EMTP. The simulation results show that both the two pre-magnetizing schemes can restrain the inrush current when suitable resistance and breaker close time are chosen, which is suitable for large marine power system.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第18期145-149,154,共6页
Power System Protection and Control
关键词
船舶电力系统
变压器
励磁涌流
预充磁
marine power system： transformer： inrush current： pre-magnetizing
