摘要
电流互感器(TA)是电力系统中的重要传变设备,但电流互感器的饱和可能引起微机继电保护误动和拒动。文章通过应用电力系统仿真软件EMTP/PSCAD对电流互感器的饱和特性进行了详细分析,建立了电流互感器模型;并且,针对二次侧不同负载情况,对稳态饱和和暂态饱和情况进行了仿真分析,从而为研究饱和问题提供了依据。此基础上,提出了以二次电压为附加判据的TA饱和检测算法,仿真结果验证该算法能正确检测电流互感器饱和问题。
Current transformer is an important transfer equipment in electrical system. Its saturation may cause misaction and nonaction of computer relays. Using power system simulation software EMTP/PSCAD, the current transformer saturation characteristics is analyzed and the TA model is established in this paper. With different loads, the steady saturation and transient saturation of current transformer are simulated to provide evidence for analyzing the saturation characteristics of current transformers. Based on this, the algorithm of current transformer saturation detection regarding the second voltage as the additional criterion is proposed.
出处
《大功率变流技术》
2009年第1期39-42,共4页
HIGH POWER CONVERTER TECHNOLOGY
