电工技术学报  2020, Vol. 35 Issue (4): 862-873    DOI: 10.19595/j.cnki.1000-6753.tces.181935
电力电子 |
基于扰动观测器的电压源型逆变器负载电流前馈控制及参数设计方法
曹文远1, 韩民晓1, 谢文强1, 李蕊2, 袁栋3
1. 新能源电力系统国家重点实验室(华北电力大学) 北京 102206;
2. 中国电力科学研究院 北京 100192;
3. 国网江苏省电力有限公司 南京 210024
A Disturbance-Observer-Based Load Current Feedforward Control and Parameter Design Method for Voltage-Sourced Inverter
Cao Wenyuan1, Han Minxiao1, Xie Wenqiang1, Li Rui2, Yuan Dong3
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source North China Electric Power University Beijing 102206 China;
2. China Electric Power Research Institute Beijing 100192 China;
3. State Grid Jiangsu Electric Power Co. Ltd Nanjing 210024 China
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摘要 为解决采用传统电压电流双环控制的电压源型逆变器在负载投切时输出电压波动的问题,提出一种基于扰动观测器的负载电流前馈控制方法。将负载电流视为系统扰动,经扰动观测器观测后前馈至电压外环补偿器的输出端,从而抑制负载电流对输出电压的影响。在不需要增设额外电流传感器、信号传输与处理电路的情况下实现对负载电流的快速跟踪,进而提升系统的动态性能以及减小逆变器输出电压的稳态误差。基于控制系统快速响应能力和稳定性的要求,给出具备普适性和可移植性的控制参数设计方法。分析表明,与传统双环控制相比,该文提出的负载电流前馈控制方法对参数摄动的灵敏度更低,系统的鲁棒性更强。仿真和实验验证了所提控制策略及参数设计方法的可行性和有效性。
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袁栋
关键词 逆变器扰动观测器参数设计方法鲁棒性    
Abstract:To solve the output voltage fluctuation caused by load switching for voltage-sourced inverter with traditional voltage and current dual loop control, a disturbance-observer-based load current feedforward control method is proposed. This method regards the load current as a system disturbance, and feeds forward it to the output of the compensator in voltage loop after it is measured by disturbance observer, thereby the influence of the load current on the output voltage is suppressed. Without adding additional current sensors, signal transmission or processing circuits, fast tracking of the load current is realized, the dynamic performance of the system is thus improved and the steady-state error of output voltage is reduced. Based on the requirements of rapid response capability and stability of the control system, a parameter design method with universality and portability is given. The analysis shows that compared with the traditional dual loop control, the disturbance-observer-based load current feedforward control method proposed in this paper is less sensitive to parameter perturbation and the system is more robust. Simulations and experiments verify the feasibility and effectiveness of the proposed control strategy and the parameter design method.
Key wordsInverter    disturbance observer    parameter design method    robustness   
收稿日期: 2018-12-23      出版日期: 2020-02-28
PACS: TM464  
基金资助:国家重点研发计划(2018YFB0904700)、国家电网公司科技项目(PD71-17-013)资助
通讯作者: 曹文远 男,1994年生,博士研究生,研究方向为交直流配电网与逆变器控制。E-mail: 18173528776@163.com   
作者简介: 韩民晓 男,1963年生,教授,博士生导师,研究方向为电力电子在电力系统中的应用。E-mail: hanminxiao@263.net
引用本文:   
曹文远, 韩民晓, 谢文强, 李蕊, 袁栋. 基于扰动观测器的电压源型逆变器负载电流前馈控制及参数设计方法[J]. 电工技术学报, 2020, 35(4): 862-873. Cao Wenyuan, Han Minxiao, Xie Wenqiang, Li Rui, Yuan Dong. A Disturbance-Observer-Based Load Current Feedforward Control and Parameter Design Method for Voltage-Sourced Inverter. Transactions of China Electrotechnical Society, 2020, 35(4): 862-873.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.181935          https://dgjsxb.ces-transaction.com/CN/Y2020/V35/I4/862