含多感应电动机负荷的微网电压稳定性仿真分析

LIN Li

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含多感应电动机负荷的微网电压稳定性仿真分析

更新时间：2025-08-13

- 含多感应电动机负荷的微网电压稳定性仿真分析
- Automation of Electric Power Systems Vol. 41, Issue 8, Pages: 78-83(2017)
- 作者机构：
  
  输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市,400044
- 作者简介：
- 基金信息：
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- Published：2017
- 稿件说明：
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LIN Li. [J]. Automation of electric power systems, 2017, 41(8): 78-83.
DOI：

LIN Li. [J]. Automation of electric power systems, 2017, 41(8): 78-83. DOI：

摘要

微网中含大量高度非线性的感应电动机负荷

对微网孤岛运行时的电压稳定性构成严重威胁。为此

针对含多感应电动机负荷的微网

根据电力系统功率平衡的原则

从理论上推导了微网各电动机负荷转差与系统电压的动态耦合关系

进而说明感应电动机负荷更加敏感的原因及多感应电动机负荷的转差和系统电压之间的动态耦合特性与微网稳定性相关。基于MATLAB/Simulink仿真平台

搭建了风光柴储多源主从控制微网

通过仿真研究了不同条件下多机叠加启动及微网故障两种情况下微网的电压稳定性

进而提出了提高含多感应电动机负荷的微网电压稳定性的措施。仿真结果表明

多感应电动机负荷之间的相互作用对微网电压稳定性具有重大影响

且串联主从微网的临界故障清除时间受三相短路故障点离感应电动机负荷点的距离和故障点离主控单元的距离双重制约

采用叠加启动策略和故障点快速切机等措施可有效提高微网电压稳定性。所得结论为含多感应电动机负荷的微网稳定性研究与控制提供了理论参考。

Abstract

The voltage stability of islanding microgrid can be seriously subjected to high penetration level of highly-nonlinear induction motor(IM)loads. For this reason

according to the principle of power balance in power systems

the dynamic coupling relation between the system voltage and motor slips is deduced in theory for the microgrid with multiple IM loads. And the reason the induction motor load is more sensitive and the dynamic coupling characteristics of IM load slips and system voltage are related to microgrid stability is given. A microgrid with master-slave control scheme is developed in MATLAB/Simulink environment

including wind turbine generator

photovoltaic

diesel synchronous generator and the energy storage device. On this basis

the voltage stability of microgrid is studied on both multiple induction motors superposition starting under different conditions and fault conditions. Then measures are proposed to improve the voltage stability of microgrid with multiple IM loads. The research results show that the interaction among multiple induction motors has significant impact on the voltage stability of the microgrid. Moreover

the critical fault clearing time of tandem microgrid with master-slave control is doubly restricted by the distance from three-phase short-circuit fault point to the point of IM loads and the point of main control unit. In addition

the strategies of superimposed starting and fault point load shedding can significantly improve the voltage stability of the microgrid. Conclusions have provided a theoretical basis for stability and control studies of multi-source microgrid with IM loads. This work is supported by Fundamental Research Funds for the Central Universities(No. CDJZR12150024).

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