基于WAMS的负阻尼低频振荡与强迫功率振荡的特征判别  

WAMS Based Characteristic Discrimination of Negative Damping Low-frequency Oscillation and Forced Power Oscillation

作　　者：杨东俊[1] 丁坚勇[2] 邵汉桥[1] 许汉平[1] 黄家祺[1] 

机构地区：[1]湖北省电力公司电力经济技术研究院,湖北省武汉市430077 [2]武汉大学电气工程学院,湖北省武汉市430072

出　　处：《电力系统自动化》2013年第13期57-62,共6页Automation of Electric Power Systems

摘　　要：当电网发生低频振荡时,正确判断振荡机理对合理选择振荡抑制措施、快速抑制振荡具有重要意义。文中基于广域测量系统(WAMS)的实测数据,对负阻尼振荡和强迫功率振荡在振荡前期、瞬态阶段、稳态阶段和衰减阶段的特征进行了分析,研究了不同阶段的负阻尼振荡和强迫功率振荡的判别方法。通过2个电网实际案例的对比分析,验证了理论分析的结论。Correct judgment of the oscillation mechanism has a great significance in rationally selecting me oscntat^u~l suppression measures and quickly suppressing the oscillation when a grid low-frequency oscillation occurs. Based on the actual measured data of wide area measurement system （WAMS）, this paper analyzes the characteristics of the negative damping oscillation and the forced power oscillation in the pre-oscillation, the transient stage, the steady state stage, and the decay stage, and studies the method of discriminating the negative damping oscillation from the forced power oscillation in different stages. Through the comparative analysis of two actual cases occurring in the grid, the conclusions of the theory analysis are verified.

关 键 词：低频振荡 负阻尼振荡 强迫功率振荡 特征判别 能流方向因子 广域测量系统 

分 类 号：TM712[电气工程—电力系统及自动化]