高频切机与OPC在孤网高频问题中的应用  

Application of over frequency generator tripping and OPC on high frequency phenomenon of isolated power grid

作　　者：杨帆[1] 王丽君[2] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003 [2]十堰供电公司,湖北十堰442000

出　　处：《节能》2013年第7期30-33,2,共4页Energy Conservation

摘　　要：大电网运行时主要采取负荷控制,而孤网运行时主要采取频率控制,因此提出控制孤网频率稳定的适用策略具有重要意义。本文阐述了孤网的概念及频率特性,指出影响孤网频率的主要因素为系统时间惯性常数和不平衡功率;分析影响高频切机保护和汽轮机超速保护配置的因素以及研究现状,并对其配置原则进行了全面总结;最后,指出现有孤网频率稳定控制策略存在均未考虑系统惯性影响、缺少明确的配置原则、控制策略间协调配合仍有欠缺等问题。The frequency control is the key in isolated power grid instead of load control in large interconnected networks.Therefore,it isof great importance to propose the frequency stability and control method for isolated power grid.The conception and frequency characteristics of isolated power grid are introduced.The main factors which influence islanding frequency are the unbalance of power and the inertia of the system.The effects and status of over frequency generator tripping and Over-speed Protection Controller are introduced.And the configuration schemes are summarized comprehensively.Finally,the shortages of the existing over frequency control methods are given,such as the overlook of system inertia,the lack of specific configuration scheme and the deficiency of coordination between control strategies.

关 键 词：孤网 频率控制 高频 高频切机保护 汽轮机超速保护 

分 类 号：TM12[电气工程—电工理论与新技术]