电网电压不平衡下六边形变换器的微分平坦控制策略  

Differential Flattening Control Strategy for Hexagonal Converters under Unbalanced Grid Voltage

作　　者：程启明 沈治超 王为涛 罗力珲 张梁 渠博岗 CHENG Qiming;SHEN Zhichao;WANG Weitao;LUO Lihui;ZHANG Liang;QU Bogang(Shanghai Key Laboratory of Power Station Automation Technology(College of Automation Engineering,Shanghai University of Electric Power),Shanghai 200090,China)

机构地区：[1]上海市电站自动化技术重点实验室(上海电力大学自动化工程学院),上海200090

出　　处：《智慧电力》2024年第3期94-101,109,共9页Smart Power

基　　金：国家自然科学基金资助项目(62303301);上海市电站自动化技术重点实验室项目(13DZ2273800)。

摘　　要：六边形变换器(Hexverter)作为一种具备多端口、低频性、高可靠性等特点的AC/AC变换器的拓朴结构,能够适用于海上风电领域。但当Hexverter应用于海上风电时,由于自身的非线性特性,线性的PID控制策略的控制效果不佳。将非线性的微分平坦控制(DFC)与Hexverter相结合,通过分析其稳定性,提出了Hexverter的微分平坦控制策略。在Matlab环境和RT-LAB半物理实验平台中建立了Hexverter的微分平坦控制系统对多种工况进行仿真对比,验证了本文所提出微分平坦控制策略的可行性。As a topology of AC/AC converter with multi-port,low-frequency and high reliability,hexagonal converter(Hexverter)can be applied to offshore wind power.However due to the nonlinear characteristics of Hexverter,the control effect of linear PID control strategy is poor when Hexverter is applied to the offshore wind power.For this reason,this paper combines the nonlinear differential flattening control(DFC)with Hexverter,and proposes a DFC strategy for Hexverter by analyzing its stability.Based on MATLAB software and RT-LAB semi-physical experimental platform,the DFC system of Hexverter is established to simulate and compare the various working conditions,verifying the feasibility of the proposed DFC strategy.

关 键 词：海上风力发电 六边形变换器 微分平坦控制 PID控制 电网不平衡 

分 类 号：TM614[电气工程—电力系统及自动化]