电气工程学报 ›› 2016, Vol. 11 ›› Issue (11): 26-32.doi: 10.11985/2016.11.004

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单相光伏并网逆变系统基于球形译码多步模型预测控制的研究

刘丛伟,肖佳松   

  1. 北方工业大学电气与控制工程学院 北京 100144
  • 收稿日期:2016-05-16 出版日期:2016-11-20 发布日期:2019-11-22
  • 作者简介:刘丛伟 男 1969年生,博士,副教授,主要研究方向为电力电子变换器基础理论、高压大功率变流器、电机控制系统以及光伏和风力发电系统的研究。|肖佳松 男 1988年生,硕士研究生,研究方向为电力电子与电力传动。

Research on Sphere Decoding Based Multistep Model Predictive Control in Single-Phase Photovoltaic Grid-Connected Inverter System

Liu Congwei,Xiao Jiasong   

  1. North China University of Technology Beijing 100144 China
  • Received:2016-05-16 Online:2016-11-20 Published:2019-11-22

摘要:

随着全球化石能源短缺,光伏发电凭借其储量巨大、清洁环保和分布广泛的特点,越来越受到人们的重视。本文针对单相屋顶光伏发电并网系统,提出了一种基于球形译码多步模型预测控制策略。这种控制策略可以解决电网电压前馈PI控制策略存在无法消除的电流静差和动态性能差,以及传统模型预测控制策略网侧电流稳态误差较大的问题。通过比较该控制策略和电网电压前馈PI控制以及传统模型预测控制策略的仿真结果,基于球形译码多步模型预测在单相光伏逆变器中能够获得更低的电网电流稳态误差,提高了系统的抗干扰能力。

关键词: 单相光伏并网系统, 并网电流控制, 球形译码, 多步模型预测控制

Abstract:

With the global fossil energy shortage, photovoltaic power generationis more and more popular because of its wide distribution, huge storage and environment-friendly. A sphere decoding based on multistep model predictive control strategy is proposed for the single phase roof photovoltaic power generation system. It can solve the issue of current static error and the poor dynamicperformance in the voltage feed-forward PI control strategy, and the poor current static error in the traditional model predictive control strategy. By comparing simulation results of this control strategy with the voltage feed-forward PI control strategy and the traditional model predictive control strategy, we know sphere decoding based multistep model predictive control can obtain lower steady-state error and improve anti-interference ability.

Key words: Single-phase grid-connected photovoltaic system, grid-connected current control, sphere decoding, multistepmodel predictive control

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