昆柳龙混合直流工程的直流高速并联开关要求研究

Study on DC High-speed Parallel Switch Requirements of Kunliulong Hybrid DC Engineering

直流高速并联开关在特高压混合直流工程中有着重要的作用,有必要对其制造要求进行研究。依据直流系统条件及运行需要,给出了直流高速并联开关在直流系统中的配置,对直流高速并联开关的计算条件及工况进行了说明。建立直流高速并联开关运行工况的等效回路,并在EMTDC中建立仿真计算模型,对位于柳北和龙门换流站的直流高速并联开关的稳态及暂态过程进行分析研究。根据研究结果初步确定了±800 kV直流工程中直流高速并联开关的关键技术参数,并提出了HSS与控制保护的配合原则,为昆柳龙混合直流输电工程制定设备技术规范提供了依据,也为类似的工程计算提供了参考。

DC high speed parallel switch plays an important role in UHV hybrid DC engineering.It is necessary to study its manufacturing requirements.According to the condition and operation requirement of DC system,the configuration of DC high speed parallel switch in DC system is given.The calculation conditions and working conditions of DC high-speed parallel switch are explained.The equivalent circuit of DC high speed parallel switch operating condition is established,and the simulation calculation model is established in the EMTDC.The DC high speed parallel switch(High speed paralleled switch,HSS)located in Liubei and Longmen converter stations is analyzed.According to the research results,the key technical parameters of DC high-speed parallel switch in±800 kV DC project are preliminarily determined,and the cooperation principle between HSS and control protection is put forward,which provides a basis for formulating equipment technical specifications for Kunming LIULONG Hybrid DC transmission project and a reference for similar engineering calculations.