微电网运行模式平滑切换控制策略研究
Research on Control Strategies for Smooth Transition of Microgrid Operation Modes
孙向飞 1肖扬 1李平 1达光军1
作者信息
- 1. 昆明理工大学,云南 昆明 650500
- 折叠
摘要
基于主从式控制模式的微网在发生非计划孤岛时,传统的PQ-V/F控制策略会导致微网难以维持系统的稳定运行.在分析微网运行模式切换时系统内电气量产生冲击原因的基础上,提出一种改进的储能变流器控制策略,通过在电压环中新增一个电压保持环路,配合外加电流环调节器,保证孤岛检测期间系统内的功率平衡,较好地解决了微网运行模式切换时系统内电压电流的冲击问题,实现运行模式的平稳过渡.在MATLAB/Simulink中搭建仿真模型,对比分析了采用传统控制策略和改进控制策略的控制效果,验证了改进控制策略的可行性和有效性.
Abstract
Based on the master-slave control mode,when a microgrid experiences an unplanned islanding,traditional PQ-V/F control strategies can lead to difficulties in maintaining the stability of the system.By analyzing the causes of electrical quantity shocks within the system during microgrid operation mode switching,an improved Power Conversion System control strategy is proposed.This strategy adds a voltage holding loop in the voltage loop and coordinates with an additional current loop regulator to ensure power balance within the system during islanding detection periods.This effectively addresses the voltage and current shock issues within the system during microgrid operation mode transitions,facilitating smooth mode transitions.A simulation model is constructed using MATLAB/Simulink to compare and analyze the control effects of traditional and improved control strategies,validating the feasibility and effectiveness of the improved control strategy.
关键词
微电网/主从结构/控制策略/平滑切换Key words
Microgrid/Master-Slave Structure/Control Strategy/Smooth Switching引用本文复制引用
出版年
2024
NETL
NSTL
万方数据