电力系统孤网高频问题研究现状和发展趋势  

Present Status and Developing Trend of Research on Over Frequency in Isolated Power Grid

作　　者：王一振[1] 马世英[1] 王青[1] 邓朴[2] 李庆生[2] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]贵州电网公司电网规划研究中心,贵州省贵阳市550002

出　　处：《电网技术》2012年第12期165-169,共5页Power System Technology

摘　　要：从国内外发生的高频问题的典型案例入手,分析了系统发生解列为孤网故障后高频失稳的特征,根据处理问题手段的不同将孤网高频问题的研究分为3大类:第1类是三级配合原则,从宏观上提出连锁切机,高频切机与汽轮机超速保护(over-speed protection controller,OPC)的保护方案,给出了解决电网解列后孤网高频运行的三级安全稳定控制措施;第2类为基于OPC建模和事故反演的研究,论述了通过灵活调整OPC动作策略来解决孤网高频问题的方法;第3类基于发电机一次调频特性,提出放开一次调频下限以及利用一次调频的频差修正回路来控制孤网高频的策略。最后指出了现存解决方案的不足,讨论了今后需要进一步研究的问题。Based on typical over frequency phenomena occurred in insolated power grids home and abroad, the characteristics of frequency instability in isolated power network due to fault-caused power grid separation are analyzed. According to the differences of measures to cope with the problem, the research on over frequency in isolated power network is divided into three categories： the first one gives the three-layer security and stability control measures composed of cascaded trip-out, over-frequency trip out and over-speed protection of steam turbine to solve the over frequency in isolated power network in macroscopic level; based on the research on the modeling of over-speed protection controller （OPC） of steam turbine and the reverse analysis of the fault causing power grid separation, the second one discusses the method to cope with the over frequency phenomenon in isolated power network by adjusting the setting of OPC flexibly; based on the primary frequency regulation characteristics of generators, the third one proposes the strategy, which eases the lower limit of primary frequency regulation and utilizes the frequency deviation corrective loop in primary frequency regulation, to cope with over frequency phenomenon in isolated power network. Finally, the defects in existing methods to cope with over frequency in isolated Power network shortage are pointed out and the problems to be further researched in future are proposed.

关 键 词：孤网 高频 超速保护 一次调频 配合原则 

分 类 号：TM77[电气工程—电力系统及自动化]