基于Prony法的暂态扰动信号分析  

Transient Disturbance Signal Analysis Based on Prony Method

作　　者：刘应梅[1] 高玉洁[2] 

机构地区：[1]中国电力科学研究院,北京市海淀区100085 [2]海南电力设计院,海南省海口市570203

出　　处：《电网技术》2006年第4期26-30,共5页Power System Technology

摘　　要：应用Prony法对配电系统中的电容器操作事件和电压放大问题进行了机理分析,并将仿真信号分解为不同的分量。通过对不同仿真信号分解结果的比较,认为电容器投切时在用户端产生的放大电压是不同频率、阻尼、幅值和相位特征的谐振分量共同作用的结果,而且谐振分量的特征与配电系统的参数和结构紧密相关,通过改变配电系统参数和结构可以减小用户端出现的放大电压。测试结果表明Prony法能够对暂态信号中的衰减谐振分量进行建模,提取各分量的幅值、频率、相位和阻尼参数,验证了Prony法对暂态扰动信号分析的有效性。By use of Prony method the mechanism of capacitor switching event and voltage magnification phenomena in power distribution system is analyzed and the simulated signals are decomposed into different components. Comparing the decomposed results of different simulated signals, it is indicated that the magnified voltage at user＇s terminal is the results of combined action of resonance components whose frequency, damping,, amplitude and phase characteristic are different while the capacitors are switched, and the features of resonant components are closely related to the structure and parameters of distribution system, so by means of changing the structure and parameters of distribution system the magnified voltage at user＇s terminal can be mitigated. Test results show that using Prony method the modeling of damped resonant components in transient signals can be realized and the amplitude, frequency, phase and damping parameter of each component can be extracted, and thereby the effectiveness of Prony method tO transient disturbance signal analysis is verified.

关 键 词：电能质量 电容器投切 暂态过电压 电压放大 PRONY法 

分 类 号：TM714[电气工程—电力系统及自动化]