Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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基于Park变换的单相逆变器静态前馈补偿控制策略

来源:电工电气发布时间:2018-09-14 09:14 浏览次数:569
基于Park变换的单相逆变器静态前馈补偿控制策略
 
赵月,崔远慧,王延平
(大连工业大学 信息科学与工程学院,辽宁 大连 116000)
 
    摘 要:针对单相光伏逆变器在双闭环控制系统中电流环采用典型Ⅰ型系统时存在抗干扰性能差的缺点,提出了一种新的电流内环静态前馈补偿控制策略。通过改进的Park变换,获得单相逆变器的等效模型,在等效逆变器模型中利用前馈解耦控制的方法得到电流的控制方程,在典型Ⅰ型电流内环控制系统中加入具有静态前馈补偿控制环节的方法抑制电流内环的干扰信号。通过SIMULINK仿真可以得出,具有静态前馈控制的电流内环控制器对比采用典型Ⅰ型系统控制器的静态性能和动态性能均良好,有效提高了电流环的抗干扰性能。
    关键词:太阳能光伏逆变器;Park 变换;静态前馈补偿;逆变器前馈解耦控制
    中图分类号:TM464     文献标识码:A     文章编号:1007-3175(2018)09-0012-04
 
Park Transform-Based Static Feed-Forward Compensation Control Strategy for Single-Phase Inverter
 
ZHAO Yue, CUI Yuan-hui, WANG Yan-ping
(School of Information Science and Engineering, Dalian Polytechnic University, Dalian 11 6000, China)
 
    Abstract: Aiming at the existing disadvantages of inferior anti-interference ability when the current loop of single-phase photovoltaic inverter adopts the typical I-type system in double closed-loop control system, this paper proposed a kind of new static feed-forward compensation control strategy for current loop. Through the improved Park transformation, the equivalent model of the single-phase inverter was obtained. In the equivalent inverter model the feed-forward decoupling control method was used to get the control equation of the currents. For the interference signal in the current control equation, the static feed-forward compensation control method was used to eliminate the interference signal present in the inner loop of the current. The SIMULINK simulation shows that for the current loop with the static feedforward control, the static property of typical I-type system controller was the same as that of dynamic property, which effectively improves the anti-interference ability of the current loop.
    Key words: solar photovoltaic inverter; Park transform; static feed-forward compensation; inverter feed-forward decoupling control
 
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