动态电压恢复器的分数阶正负序解耦控制策略  

Fractional order plus-negative sequence decoupling control strategy for dynamic voltage restorer

作　　者：吴朝俊 王振跃 杨宁宁[3] 邵文权[1,2] WU Chaojun;WANG Zhenyue;YANG Ningning;SHAO Wenquan(School of Electronic Information,Xi′an Polytechnic University,Xi′an 710048,China;Xi′an Key Laboratory of Interconnected Sensing and Intelligent Diagnosis for Electrical Equipment,Xi′an 710048,China;School of Electrical Engineering,Xi′an University of Technology,Xi′an 710048,China)

机构地区：[1]西安工程大学电子信息学院,陕西西安710048 [2]西安市电气设备互联感知与智能诊断重点实验室,陕西西安710048 [3]西安理工大学电气工程学院,陕西西安710048

出　　处：《电力工程技术》2025年第1期60-68,共9页Electric Power Engineering Technology

基　　金：陕西省自然科学基础研究计划资助项目(2021JM-449)。

摘　　要：为了改善动态电压恢复器(dynamic voltage restorer,DVR)治理不对称电压暂降故障的性能,文中提出基于瞬时对称分量法的分数阶正负序解耦控制策略,并将其应用于三相四桥臂逆变器DVR系统中。首先,利用对称分量法得到DVR系统的分序解耦数学模型。其次,针对传统对称分量法不适用于系统暂态过程分析的问题,采用瞬时对称分量法得到不对称电压电流信号瞬时值的正负零序分量,并独立设计三序分量的电压电流双闭环比例积分(proportional-integral,PI)控制策略。然后,将整数阶正负序解耦控制策略推广到分数阶,并利用频域方法与增益变化时的鲁棒性条件相结合对相关参数进行校正。最后,通过仿真结果验证分数阶正负序解耦控制策略应用于DVR系统的可行性,且与传统正负序解耦控制相比较,所提策略具有更好的动态响应速度与抗干扰性能。In order to improve the performance of dynamic voltage restorer(DVR)in controlling asymmetrical voltage sag fault,a fractional order plus-negative sequence decoupling control strategy based on instantaneous symmetric component method is proposed and applied to three-phase four-bridge inverter DVR system.Firstly,the partial sequence decoupling mathematical model of the DVR system is obtained by using the symmetric component method.Secondly,to solve the problem that the traditional symmetric component method is not suitable for the analysis of the transient process of the system,the positive and negative zero sequence components of the instantaneous value of the asymmetric voltage and current signal are obtained by using the instantaneous symmetric component method.Then,the integer order plus-negative order decoupling control strategy is extended to fractional order,and the frequency domain method is combined with the robustness condition when the gain changes to correct the relevant parameters.Finally,the simulation results verify the feasibility of the fractional order plus-negative sequence decoupling control strategy applied to the DVR system,and the proposed strategy has better dynamic response speed and anti-interference performance than the traditional plus-negative sequence decoupling control startegy.

关 键 词：电压暂降 动态电压恢复器(DVR) 三相四桥臂逆变器 瞬时对称分量法 正负序解耦控制 分数阶控制 

分 类 号：TM761[电气工程—电力系统及自动化]