基于前馈解耦的交直流混合微电网双向AC-DC变换器控制策略研究  

Research on bidirectional AC-DC converter feedforward decoupling control strategy of hybrid AC/DC microgrid

作　　者：姚卫波 徐晔 黄克峰 周美权 崔灏然 YAO Weibo;XU Ye;HUANG Kefeng;ZHOU Meiquan;CUI Haoran(College of Defense Engineering,PLA Army Engineering University,Nanjing 210007)

机构地区：[1]陆军工程大学国防工程学院,南京210007

出　　处：《电气技术》2022年第5期25-33,共9页Electrical Engineering

摘　　要：作为交直流混合微电网的重要器件,双向AC-DC变换器能够实现能量的双向流动,满足混合微电网中负载波动对电能的需求,可平衡交直流母线电压。但双向AC-DC变换器的控制系统具有时变性,且非线性和耦合性较强,控制复杂,需要解决控制量间的耦合问题。本文针对这一问题展开研究,首先介绍混合微电网系统的结构,并建立双向AC-DC变换器数学模型;然后针对双向AC-DC变换器,采用交流侧电压前馈解耦方案,设计控制器并分析比例积分(PI)控制策略的稳定性;最后基于Matlab/Simulink建立系统仿真模型,以验证所提控制策略的可行性。仿真结果表明,前馈解耦控制策略下的双向AC-DC变换器具有快速的动态响应和良好的抗负载扰动性能。As an important component of the AC/DC hybrid microgrid,the bidirectional AC-DC converter can realize the bidirectional flow of energy,meet the demand for electric energy from load fluctuations in the hybrid microgrid,and balance the AC/DC bus voltage.However,the control system of the bidirectional AC-DC converter is time-varying;the nonlinearity and coupling are strong;the control is complicated;it is necessary to solve the coupling problem between the control variables.This article focuses on this problem.First,the structure of the hybrid microgrid system is introduced and the mathematical model of the bidirectional AC-DC converter is establlished.Then,for the bidirectional AC-DC converter,the AC side voltage feedforward decoupling scheme is adopted.The controller is designed and the stability of the proportional integral(PI)control strategy is analyzed.Finally,a system simulation model is established based on Matlab/Simulink to verify the feasibility of the proposed control strategy.The simulation results show that the bidirectional AC-DC converter under the feedforward decoupling control strategy has fast dynamic response and good anti-load disturbance performance.

关 键 词：交直流混合微电网 双向AC-DC变换器 双环比例积分(PI)控制 建模仿真 

分 类 号：TM46[电气工程—电器] TM721.3