完善机组涉网控制提高电网可靠性_0.doc

完善机组涉网控制提高电网可靠性 田 丰1 罗向东2 1. 广东电网公司电力科学研究院，广东 广州 510600；2. 广东省电力调度中心，广东 广州 510600 摘 要：现代化大电网发生事故，如2003年8月14日美加电网大面积停电，社会和经济影响非常深远，甚至引起世界各国政府和电力工作者的普遍关注，它反映出电力生产、传输、电网可靠性及电力体制等问题。在普遍关注电网安全的同时，电网故障后的恢复、发电机组安全及它们与电网之间的协调，同样令人反思。在对DEH若干容易忽视的涉网功能如超速保护控制OPC、负荷快速返回FCB、汽门快关FV等进行论述的基础上，指出设计、调试、完善相关自动保护和控制策略是改善电网稳定性行之有效的手段。 关键词：超速保护控制；负荷快速返回；汽门快关；数字电液调节；电网；可靠性 中图分类号： 文献标识码：A 文章编号： Perfect of unit control functions with grid to improve reliability of grid TIAN Feng1; LUO Xiang-dong2 1. Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510600, China; 2. Guangdong Electric Power Dispatch Center, Guangzhou 510600, China Abstract: Any failure happens in modern big power grid such as blackout of interconnected north America power grid occurred on August 14.2003, would profound affect society and economy, even arouses world countries government and power staff’s universal solicitude, which reflects problems existed in power produces and transmits, also reliability of electrical grid and system. While paying more attention to the safety of grid generally, the recovery after power grid fault, safety of generation unit and their coordination worth also reviewing. Some DEH functions related to grid which would be easy overlook, such as over-speed protection control, fast cut back, fast valving are analyzed in detail. It is pointed out that design, commissioning, to perfect related automatism protection and their control strategy is the means of the effective improvement stability of grid. Key words: Over-speed protection control; Fast cut back; Fast valving; Digital Electro-Hydraulic; Power grid; Reliability 0 引言 现代化大电网发生事故，如2003年8月14日美加电网大面积停电，社会和经济影响非常深远，它反映出电力生产、传输、电网可靠性及电力体制等问题。在普遍关注电网安全的同时，电网故障后的恢复、发电机组安全及它们与电网之间的协调，同样令人反思[1,2]。在我国电力体制改革，厂网分离、区域发电公司、电网公司形成规模之际，更应引起重视。厂网相互依存，尤其在事故发生时更为凸显，电厂面临电网故障应有积极、有效的应对，根据故障性质、范围决定承受扰动的程度及特殊工况下运行的时间，设计、调试、完善相关自动保护和控制策略是改善电网稳定性行之有效的手段。如出现带局域网运行时，完善的一次调频及超速保护控制OPC (Over-speed Protection C