基于功率切换模型的三相VSC切换控制方法
A Power Switching Control Strategy of Three-phase VSC Based on Power Switching Model
郭鑫 1潘缘 1李伟鹏 1刘军1
作者信息
- 1. 西安理工大学自动化与信息工程学院,陕西省 西安市 710048
- 折叠
摘要
三相电压源变换器(voltage source converter,VSC)工作过程可视为在不同开关状态(即不同子系统)下的切换,是一种典型的切换系统.基于切换系统理论,提出一种三相电网平衡条件下基于功率切换模型的三相 VSC 切换控制策略.相较于传统基于线性化模型的三相VSC控制方法,所提方法具有模型精确无近似,控制参数少,控制器实现简单,无需复杂的坐标旋转变换和脉冲宽度调制过程,对于电路参数不确定具有强鲁棒性等优点.相较于传统基于电流切换模型的三相VSC切换控制策略,所提方法具有模型更便于系统分析与切换规则设计且提升了系统延迟条件下系统稳定性等优点.仿真及实验比较结果证明了所提方法的有效性及优越性.
Abstract
The three-phase voltage resource converter(VSC)working process can be treated as the switching between different switching states(i.e.,subsystems),which is a typical switched system.Based on the switched system theory,a switching control strategy of three-phase VSC based on power switching model is proposed for balanced grid condition.Comparing with the traditional linearization modelling and control methods,the proposed method has advantages such as accurate mathematical model,simple control structure,less control parameters,no rotation coordination transformation and pulse width modulation process,as well as enhanced robustness to the circuit parameters uncertainty.Comparing with the traditional switching control methods of three-phase VSC based on current switching model,the proposed method is more convenient to system analysis and switching rule design,and the system stability under system delay condition is improved.The simulation and experiment comparison results verify the effectiveness and superiority of the proposed method.
关键词
三相电压源变换器/切换系统/功率切换模型/渐进稳定性/切换表Key words
three-phase voltage resource converter(VSC)/switched system/power switching model/asymptotically stale/switching table引用本文复制引用
基金项目
国家自然科学基金青年基金(61803300)
出版年
2024
国家科技期刊平台
NSTL
万方数据