基于能量变化率的电力系统低频振荡预警研究  

Research on Early Warning of Power System Low Frequency Oscillation Based on Energy Change Rate

作　　者：杜振川[1] 许文杰 刘涤尘[1] 云雷[1] 何龙[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]南方电网超高压输电公司,海南海口570105

出　　处：《陕西电力》2011年第12期5-9,共5页Shanxi Electric Power

基　　金：科技部科学技术基础研究专项资金(NCSIEKJ-2010-07);中央高校基本科研业务费专项基金(201120702020009)

摘　　要：电力系统低频振荡是影响电网安全稳定的重要问题,迅速发展的广域测量系统(WAMS)为低频振荡的预警研究提供了契机。文章从能量角度出发,详细分析了不平衡能量变化率与低频振荡幅度之间的关系,从而提出1种分析低频振荡的新方法。该方法能够简单快速地判断扰动是否会引起增幅低频振荡,并且及时给出预警。在四机两区域系统中进行仿真计算,结果验证了该方法的有效性。Power system low frequency oscillation is an important issue for the security and stability of power grid. The rapid development of wide area measurement system （WAMS） provides an opportunity for early warning of low-frequency oscillation. Starting with the energy, the relationship between energ＇y change rate and the amplitude of low-frequency oscillation is analyzed, and a new analysis method for the low-frequency oscillation is proposed. The method can quickly judge whether the disturbance will cause an increasing low-frequency oscillation, and give timely warning. The simulation analysis were carried out in four-machine system, the results demonstrate that the suggested method is effective.

关 键 词：电力系统 低频振荡 预警 广域测量系统 能量变化率 

分 类 号：TM712[电气工程—电力系统及自动化]