多端直流输电系统分散式二次频率恢复及功率协调控制  

Decentralized Secondary Frequency Restoration and Power Sharing Control for MTDC Transmission Systems

作　　者：刘兴华 张潇月 曹晖[2] 郭方洪 倪骏康 熊连松[2] 同向前[1] LIU Xinghua;ZHANG Xiaoyue;CAO Hui;GUO Fanghong;NI Junkang;XIONG Liansong;TONG Xiangqian(School of Electrical Engineering,Xi'an University of Technology,Xi'an 710054,Shaanxi,China;School of ElectricalEngineering,Xi'an Jiaotong University,Xi'an 710049,Shaanxi,China;School of Information Engineering,ZhejiangUniversity of Technology,Hangzhou 310023,Zhejiang,China;School of Automation,Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China)

机构地区：[1]西安理工大学电气工程学院,陕西西安710054 [2]西安交通大学电气工程学院,陕西西安710049 [3]浙江工业大学信息工程学院,浙江杭州310023 [4]西北工业大学自动化学院,陕西西安710072

出　　处：《电网与清洁能源》2021年第5期1-8,共8页Power System and Clean Energy

基　　金：国家自然科学基金(61903333,U2003110)资助项目。

摘　　要：多端直流输电系统由于直流输电的隔离作用,原有的频率控制机制只能作用于子网。为解决其二次频率恢复和有功功率协调问题,提出了一种完全分散式控制策略,该策略通信代价低,鲁棒性强。利用李雅普诺夫函数证明了设计的分散式控制器通过设置适当的控制器参数,可以在一定稳态误差范围内将频率调整到标称值,并根据不同的工作条件调整有功功率分配比。考虑了一个由4个交流系统组成的多端直流输电系统,通过Matlab/Simulink仿真验证了所提出的分散式控制策略的有效性。Due to the isolation effect of direct current transmission,the primary frequency control mechanism can only work on AC area in multi-terminal direct current(MTDC)transmission system.In order to solve the problem of secondary frequency restoration and active power sharing,a completely decentralized control strategy is proposed,which has low communication cost and strong robustness.The Lyapunov function is used to prove that the designed decentralized controller can adjust the frequency to the nominal value with bounded steady-state error,which can be arbitrarily small by setting proper controller parameters,and adjust the active power distribution ratio according to different working conditions.An MTDC transmission system composed of four AC systems is considered.The effectiveness of the proposed decentralized control strategy is verified by Matlab/Simulink simulation.

关 键 词：多端直流输电系统 分散式控制器 二次频率恢复 功率协调控制 

分 类 号：TM723[电气工程—电力系统及自动化]