基于光伏储能的DVR分数阶PI控制策略

王振跃; 吴朝俊; 杨宁宁

doi:10.16513/j.2096-2185.DE.2308402

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分布式能源 ›› 2023, Vol. 8 ›› Issue (4) : 11-19. DOI: 10.16513/j.2096-2185.DE.2308402

学术研究

基于光伏储能的DVR分数阶PI控制策略

王振跃 ¹^,² ,
吴朝俊 ¹^,² ,
杨宁宁 ³

作者信息 +

Fractional PI Control Strategy of DVR Based on Photovoltaic Energy Storage

Zhenyue WANG ¹^,² ,
Chaojun WU ¹^,² ,
Ningning YANG ³

Author information +

文章历史 +

摘要

动态电压恢复器(dynamic voltage restorer，DVR)是设备侧有效治理电压暂降故障的装置，目前DVR的控制设计基本采用比例积分(proportional-integral，PI)控制器，但是DVR为非线性系统，传统PI控制器并不能达到理想的控制效果。为改善DVR的控制效果，提出一种新型电压电流双闭环分数阶PI(fractional order PI，FOPI)控制策略。首先，以光伏－储能系统为DVR直流侧能量源，并建立相应的三相逆变器前馈解耦数学模型；其次，设计光伏－储能系统与逆变器的双闭环PI控制策略，并进行参数整定；之后，将整数阶控制策略推广到分数阶来改善控制效果，并采用增益变化时的鲁棒性准则对FOPI控制器进行参数校正；最后，搭建不同控制策略下的DVR仿真模型，仿真结果验证了FOPI控制器应用于DVR系统的可行性，且相对于传统PI控制器其具备更好的动态响应速度与抗干扰性能。

Abstract

Dynamic voltage restorer (DVR) is a device to effectively control the voltage dip fault at the device side. At present, the control design of DVR basically uses proportional-integral (PI) controller, but it is a nonlinear system, and the traditional PI controller can not achieve the ideal control effect. In order to improve the control effect of DVR, a novel voltage-current double closed loop fractional order PI (FOPI) control strategy is proposed in this paper. Firstly, the photovoltaic energy storage system is taken as the DC energy source of DVR, and the corresponding mathematical model of feedforward decoupling of three-phase inverter is established. Secondly, the double closed-loop PI control strategy of photovoltaic energy storage system and inverter is designed, and the parameters are adjusted. Then the integer order control strategy is extended to fractional order to improve the control effect, and the robustness criterion is used to correct the parameters of FOPI controller when the gain changes. Finally, DVR simulation models under different control strategies are built, and the simulation results verify the feasibility of FOPI controller applied to DVR system, and it has better dynamic response speed and anti-interference performance than traditional PI controller.

导出引用

王振跃, 吴朝俊, 杨宁宁. 基于光伏储能的DVR分数阶PI控制策略[J]. 分布式能源. 2023, 8(4): 11-19 https://doi.org/10.16513/j.2096-2185.DE.2308402

Zhenyue WANG, Chaojun WU, Ningning YANG. Fractional PI Control Strategy of DVR Based on Photovoltaic Energy Storage[J]. Distributed Energy Resources. 2023, 8(4): 11-19 https://doi.org/10.16513/j.2096-2185.DE.2308402

中图分类号： TK02; TM76

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