摘要
利用广域测量系统(WAMS)提供的数据进行电力系统振荡模态的在线辨识,对于及时监测系统的阻尼情况并及时实施有效的控制具有重要意义。分析了如何利用测量数据构造矩阵束并进行电力系统振荡模态辨识的方法。该方法可以由不同测点提供的系统响应数据快速检测出不同振荡模态的振荡频率、阻尼系数、振荡幅值和相对相位等有关信息。利用辨识出的模态信息,可以在线监测大规模电力系统阻尼薄弱区域并及时发现故障发生区域。EPRI-36节点仿真算例和某省网实际系统分析结果表明,矩阵束方法能够准确地估计系统的振荡模态,并具有较强的抗噪声能力,是一种适于在线应用的振荡模态信息辨识方法。
On-line identification of power system oscillation modes based on wide-area measurement system （WAMS） has an important significance for damping monitoring and effective control application of real time system. Method of power system oscillation mode identification utilizing matrix pencil constructed from sampled data is presented. According to this method, information of frequencies, damping ratio, amplitudes and phase of different oscillation modes can be obtained directly based on system response. By use of the identification information, the poorly damped area and the regions of the grid affected by the mode are detected on-line. Effectiveness of the proposed method is verified by simulation of EPRI-36 system and a certain practical electric network.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2007年第19期12-17,共6页
Proceedings of the CSEE
基金
黑龙江省自然科学基金项目(E0326)。
关键词
电力系统
广域测量
低频振荡
矩阵束
模态辨识
power system
wide-area measurement system
low frequency oscillation
matrix pencil
mode identification
