考虑用电和馈电模式的变流器电驱系统建模与稳定性分析  

Modeling and stability analysis of converter-based electric drive system considering power consumption and power feed modes

作　　者：王凯[1] 吕敬[1] 林鸿飞 柴炜 WANG Kai;LÜJing;LIN Hongfei;CHAI Wei(Key Laboratory of Control of Power Transmission and Conversion,Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China;Electric Power Research Institute,State Grid Shanghai Municipal Electric Power Company,Shanghai 200437,China)

机构地区：[1]上海交通大学电力传输与功率变换控制教育部重点实验室,上海200240 [2]国网上海市电力公司电力科学研究院,上海200437

出　　处：《电力自动化设备》2024年第1期203-208,共6页Electric Power Automation Equipment

基　　金：国网上海市电力公司科技项目(52094022003R)。

摘　　要：由大量异步电机驱动设备构成的电力电子化交流配用电系统存在严重的次/超同步振荡问题。电驱系统正常工作时具有用电和馈电2种运行模式,现场振荡现象表明不同的运行模式对系统的稳定性影响也不同。建立了含机侧系统的电驱系统详细阻抗模型,利用阻抗分析法揭示了电驱系统接入电网的次/超同步振荡机理,分析了运行模式、电网强度、控制参数、交流电压幅值等因素对系统次/超同步稳定性的影响,并基于相位裕度灵敏度明确了主导影响因素。基于实际系统数据,搭建了时域仿真模型,仿真复现了振荡现象,并验证了理论分析的正确性。There is a serious problem of sub/super-synchronous oscillation in power electronics-based AC distribution system which is composed of a large number of asynchronous motor drive equipment.The elec⁃tric drive system has two operating modes:power consumption and power feed.The on-site oscillations show that different operating modes have different effects on the stability of the system.A detailed impedance model of the electric drive system with the machine-side system is established,and the impedance analytical method is used to reveal the sub/super-synchronous oscillation mechanism of the electric drive system connected to the power grid.The influence of operating mode,power grid strength,control parameters,AC voltage amplitude and other factors on the sub/super-synchronous stability is analyzed,and the dominant influencing factors are identified based on the parameter sensitivity of the phase margin.Based on the actual system parameters,a time-domain simulation model is built,the oscillation phenomenon is reproduced,and the correctness of the theoretical analysis is verified.

关 键 词：异步电机驱动系统 次/超同步振荡 用电 馈电 相位裕度灵敏度 

分 类 号：TM712[电气工程—电力系统及自动化]