直流频率限制控制器参数多目标双层优化设计方法  

Multi-objective bi-level optimization design method of DC frequency limiting controller parameters

作　　者：王渝红[1] 朱杰 曾琦[1] 邰克强 于光远 尹爱辉 陈立维 WANG Yuhong;ZHU Jie;ZENG Qi;TAI Keqiang;YU Guangyuan;YIN Aihui;CHEN Liwei(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;Jinan Power Supply Company of State Grid Shandong Electric Power Co.,Ltd.,Jinan 250000,China)

机构地区：[1]四川大学电气工程学院,四川成都610065 [2]国网山东省电力公司济南供电公司,山东济南250000

出　　处：《电力自动化设备》2022年第9期189-196,224,共9页Electric Power Automation Equipment

基　　金：国家电网有限公司总部科技项目(5100-202055459A-0-0-00)。

摘　　要：异步联网方式下,送端电网转动惯量减小,频率问题突出,直流频率限制控制器(FLC)能有效改善送端电网频率特性。提出了一种直流FLC参数多目标双层优化设计方法。首先,分析了直流FLC参数对其频率调节特性的影响。在此基础上,考虑大功率阶跃扰动和连续小负荷扰动2种运行工况的特点,兼顾直流FLC的频率调节效果、动作特性以及对受端电网频率的影响程度多个目标,构建了直流FLC参数双层优化模型。然后,根据所建模型的特点采用进化算法分层递进求解优化问题,实现了对直流FLC参数的综合最优设计。最后,在MATLAB/Simulink仿真平台中搭建了2区域4机直流异步互联电网模型。仿真结果验证了所提方法不仅能够保证直流FLC对送端电网频率的有效调节,还可改善直流FLC的动作特性,缓解直流FLC对受端电网频率造成的影响。The frequency problem is pointed out caused by the decreased rotational inertia of sending end power grid in asynchronous interconnected mode.The DC FLC(Frequency Limiting Controller)can effectively improve the frequency characteristics of the sending end power grid.A multi-objective bi-level optimization design method of DC FLC parameters is proposed.Firstly,the influence of DC FLC parameters on its frequency regulation characteristics is analyzed.On this basis,considering the characteristics of two operation conditions of large power step disturbance and continuous small load disturbance,and combining the objects of the frequency regulation effect,operation characteristics of DC FLC and the influence on the frequency of receiving end power grid,a bi-level optimization model of DC FLC parameters is constructed.Then,the evolutionary algorithm is employed to solve the optimization problem hierarchically and progressively according to the built model characteristics,and the comprehensive optimal design for DC FLC parameters is realized.Finally,a two-area and four-machine DC asynchronous interconnection power grid model is built in MATLAB/Simulink platform.The simulative results verify that the proposed method can not only ensure DC FLC effectively adjust the frequency of the sending end power grid,but also improve the operation characteristics of DC FLC,and alleviate the impact of DC FLC on the frequency of the receiving end power grid.

关 键 词：高压直流输电 直流频率限制控制器 异步互联 参数优化 多目标双层优化 

分 类 号：TM761.2[电气工程—电力系统及自动化]