电力电子化不利于电力系统的小扰动稳定性  

Power Electronization is not Conducive to Small Disturbance Stability of Power Systems

作　　者：秦昌民 马兆兴 朱文杰 QIN Changmin;MA Zhaoxing;ZHU Wenjie(School of Information and Control Engineering,Qingdao University of Technology,Qingdao 266520,Shandong,China;Key Laboratory of Smart Grid of Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]青岛理工大学信息与控制工程学院,山东青岛266520 [2]天津大学智能电网教育部重点实验室,天津300072

出　　处：《济南大学学报（自然科学版）》2023年第3期316-321,330,共7页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金项目(61803220);山东省自然科学基金项目(ZR2020ME194)。

摘　　要：为了研究电力电子化电力系统的小扰动稳定性,基于电力电子化对电力系统的影响,以电压源换流器高压直流输电系统中的电力电子器件为例,推导高压直流输电系统换流器逆变侧输出电流的惯性特征;为了验证该惯性特征对电力电子化电力系统小扰动稳定性的影响,利用特征值分析法,结合仿真工具,分别对传统的简单三机系统和IEEE14节点系统及其对应电力电子化电力系统的小扰动稳定性进行分析。结果表明,高压直流输电系统换流器逆变侧输出电流具有惯性特征,电力系统的电力电子化不利于系统的小扰动稳定性。To research small disturbance stability of power electronic power systems,on the basis of influences of characteristics of power electronics on the power systems,taking power electronic devices in high voltage direct current systems of voltage source converters as an example,the inertia characteristic of output current on inverter side of converters in high voltage direct current systems was deduced.In order to verify influences of this inertia characteristic on the small disturbance stability of the power electronic power systems,using the eigenvalue analysis method,combined with simulation tools,the small disturbance stability of the traditional simple three-machine system and IEEE14 node system as well as their corresponding power electronic power systems.The results show that the output current on inverter side of converters in high voltage direct current systems has the inertia characteristic,and the power electronization of power systems is not conducive to the small disturbance stability of the systems.

关 键 词：电力电子化电力系统 小扰动稳定性 换流器 特征值分析 惯性 

分 类 号：TM712[电气工程—电力系统及自动化]