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柔性多状态开关反馈线性化滑模控制
作者:
作者单位:

1.合肥工业大学电气与自动化工程学院,安徽省合肥市 230009;2.国网浙江省电力有限公司,浙江省杭州市 310000;3.国网浙江省电力有限公司电力科学研究院,浙江省杭州市 310014

作者简介:

张国荣(1963—),男,博士,教授,博士生导师,主要研究方向:电能质量控制技术、电力电子变换技术。E-mail:zhanggrcao@163.com
侯立凯(1994—),男,通信作者,硕士研究生,主要研究方向:电力电子功率变换技术。E-mail:793357820@qq.com
彭勃(1991—),男,博士研究生,主要研究方向:电力电子功率变换技术。E-mail:pengbo1991@126.com

通讯作者:

基金项目:

国家重点研发计划资助项目(2017YFB0903100);国家电网公司科技项目(521104170043)。


Feedback Linearization Sliding Mode Control Strategy for Soft Open Point
Author:
Affiliation:

1.School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China;2.State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310000, China;3.Electric Power Research Institute of State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310014, China

Fund Project:

This work is supported by National Key R&D Program of China (No. 2017YFB0903100) and Sate Grid Corporation of China (No. 521104170043).

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    摘要:

    柔性多状态开关(SOP)能够实现配电网馈线潮流灵活的调控,改善电压分布水平,提升配电网消纳分布式电源的能力,已成为配电网领域的一个研究热点。文中以三端口SOP为研究对象,建立了三端SOP的数学模型。针对SOP数学模型体现出的非线性及强耦合的特点,通过坐标变换得到反馈线性化模型,对该模型设计了滑模控制器。文中将反馈线性化控制和滑模控制相结合,并用该复合控制取代传统比例-积分(PI)双环控制的电流内环,与传统PI双环控制相比,可以减少PI控制环节,降低PI参数整定的难度。根据SOP不同运行模式的要求,分别实现了各端口定直流电压和定无功功率模式、定有功功率和无功功率模式、定交流电压模式下的反馈线性化滑模控制算法。在MATLAB/Simulink中搭建三端口SOP仿真模型,仿真结果表明,与传统PI控制相比,所提出的控制策略动态性能好、鲁棒性强。最后,通过几种典型工况的仿真,进一步验证了所提控制策略的有效性。

    Abstract:

    Soft open point (SOP) has become a research hotspot in the field of distribution network, which can realize flexible regulation of feeder flow of distribution network, improve voltage distribution level, and promote the ability of distribution network to consume distributed generation. The three-port SOP is studied and the corresponding mathematical model is established in this paper. According to the strong coupling and nonlinearity of the mathematical model, the feedback linearization model is obtained by coordinate transformation, and the sliding mode controller is designed for the model. In this paper, the feedback linearization control and sliding mode control are combined, and the composite control is used to replace the current inner loop of the traditional dual closed-loop proportion-integral (PI) control. Compared with the traditional PI control, the composite control can reduce the PI control link and the difficulty in PI parameter setting. According to the requirements of different operation modes of SOP, the feedback linearization sliding mode control algorithm in constant DC voltage and reactive power mode, constant active and reactive power mode and constant AC voltage mode are realized, respectively. A three-port SOP system is built in MATLAB/Simulink, and simulation results show that the proposed control strategy has good dynamic performance and robustness compared to the traditional PI control. Finally, the effectiveness of the proposed control strategy is further verified by simulation of several typical operation conditions.

    图1 三端SOP系统结构图Fig.1 Structure diagram of three-port SOP system
    图2 参数摄动时2种控制策略下的a相电流波形Fig.2 Current curves of phase a with two control strategies when parameters change
    图3 有功功率变化时2种控制策略下的a相电流波形Fig.3 Current curves of phase a with two control strategies when active power changes
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引用本文

张国荣,侯立凯,彭勃,等.柔性多状态开关反馈线性化滑模控制[J].电力系统自动化,2020,44(1):126-133. DOI:10.7500/AEPS20190616005.
ZHANG Guorong,HOU Likai,PENG Bo,et al.Feedback Linearization Sliding Mode Control Strategy for Soft Open Point[J].Automation of Electric Power Systems,2020,44(1):126-133. DOI:10.7500/AEPS20190616005.

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历史
  • 收稿日期:2019-06-16
  • 最后修改日期:2019-08-05
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  • 在线发布日期: 2020-01-04
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