基于RTDS的南方电网失步解列策略可靠性研究

Study on the Reliability of Out-of-step Splitting Strategy for China Southern Power Grid Based on RTDS

为检验南方电网失步解列系统及其策略的可靠性,利用RTDS(real time digital simulator)对南方电网主网主要断面进行解列动作特性和电压定值试验。该试验搭建了南方电网500kV及以上交直流电网RTDS模型、失步解列系统、直流控制保护装置等组成的实时闭环仿真试验平台。根据2011年南方电网丰大极限运行方式,在两广断面及云南、贵州送出断面等配置失步解列装置,模拟直流闭锁、西电东送主通道送受端三相短路开关拒动等严重故障,全面测试严重故障下失步解列系统动作特性,分析安装点解列装置之间的动作选择配合及电压定值设置的合理性,验证策略的可靠性。试验表明,南方电网失步解列系统协调配合正确动作,失步解列稳控策略有效可靠。

To examine the reliability of out-of-step splitting system and its strategy of China Southern Power Grid （CSG）, real time digital simulator （RTDS） is introduced to study the out-of-step splitting characteristics of main sections and certain voltage values in this paper. A loop-locked real- time simulation experiment platform that consists of the RTDS models of AC/DC 500kV and above, out-of-step splitting systems, HVDC control and protection devices in CSG is set up. Based on ultimate operation mode in 2011, splitting devices are installed at the sections of Guangdong- Guangxi, Yunnan, Guizhou and others, such serious faults as HVDC block, switch＇s failure when three-phase short-cir- cuit occurs at sending and receiving terminals on main chan- nel of power tansfering from west to east are simulated. Theaction characteristics of out-of-step splitting system under se- rious failures are comprehensively tested, and the reason- ability of the coordination of splitting devices and the voltage values setting are analyzed, which verify the reliability of the strategy. The simulation results show that the Out-of-Step Split- ting System of CSG is effective and its strategy is reliable.