电力系统强迫功率扰动源波形与大小估计  

Estimation of Waveform and Magnitude of Forced Power Disturbance Source in Power System

作　　者：李从善[1] 和萍[1] 李文峰 杨小亮[1] 王明杰 杨存祥[1] 

机构地区：[1]郑州轻工业学院电气信息工程学院,郑州450002 [2]国网河南省电力公司经济技术研究院,郑州450052

出　　处：《电力系统及其自动化学报》2018年第2期30-35,共6页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(51607158;51507157);河南省重大科技专项资助项目(161100211600);高等学校重点科研资助项目(16A470016)

摘　　要：强迫功率扰动源波形与大小对电力系统稳定性有重要影响。在电力系统原状态方程基础上,引入一个用以代表系统中实际发生扰动的虚拟扰动,以此构建扰动观测器。通过扰动观测器的输出与系统真实输出进行比较,形成残差,采用迭代算法进行求解,从而实现对系统扰动的准确估计。在此基础上,研究了不同扰动源特性对系统稳定性的影响。最后,通过时域仿真对该方法的有效性进行了验证。结果表明,该观测器能够同时实现对强迫功率扰动源和系统状态估计,随机扰动源相比规则扰动源更易引起系统的不稳定。The waveform and magnitude of forced power disturbance source have important influence on the stability ofpower system. Based on the system’s original equation of state,a virtual disturbance is introduced to represent the actu-al disturbance in the system,and a disturbance observer is constructed accordingly. The output of the disturbance ob-server is compared with the real output of the system to form a residual error,which is solved by an iterative algorithm,thus an accurate estimation of the system disturbance is realized. On this basis,the influences of different characteris-tics of disturbance sources on the system stability are studied. Finally,the validity of the proposed method is verified bytime domain simulation. It is concluded that the constructed observer can estimate both the forced power disturbancesource and the system state. Compared with the regular disturbance source,the random disturbance source is more like-ly to cause system instability.

关 键 词：扰动观测器 状态方程 强迫扰动 估计 电力系统 

分 类 号：TM7[电气工程—电力系统及自动化]