基于超导磁储能装置的MMC-HVDC系统直流振荡抑制方法  

Superconducting magnetic energy storage device based DC oscillation mitigationmethod in MMC-HVDC system

作　　者：马文忠[1] 丁安敏 周冠宇[1] 赵雨 张彦 张奎同 董磊[1] MA Wenzhong;DING Anmin;ZHOU Guanyu;ZHAO Yu;ZHANG Yan;ZHANG Kuitong;DONG Lei(Institute of New Energy,China University of Petroleum(East China),Qingdao 266580,China;Shandong Energy Group Co.,Ltd.,Jinan 250014,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东青岛266580 [2]山东能源集团有限公司,山东济南250014

出　　处：《电力自动化设备》2020年第9期184-189,202,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51777216);山东省自然科学基金资助项目(ZR2018MEE040,ZR2019MEE094)。

摘　　要：基于模块化多电平换流器的柔性直流输电(MMC-HVDC)系统中的功率控制换流站对外呈现负阻性,降低了系统阻尼,使系统产生直流振荡甚至导致系统失稳。通过直流侧并联超导磁储能装置抑制系统功率振荡,以解决MMC-HVDC系统向恒定功率负载供电所导致的弱阻尼问题。建立了双端MMC-HVDC系统的小信号模型,通过小信号稳定性分析方法研究了影响MMC-HVDC系统稳定性的主要因素,并且验证了所提直流振荡抑制方法的有效性。在MATLAB/Simulink中搭建了双端MMC-HVDC系统模型,并与改变控制器的功率阻尼控制策略进行时域仿真对比,结果证明了所提控制策略能有效抑制系统振荡,提高系统稳定性。Converter in power control mode of MMC-HVDC(Modular Multilevel Converter based High Voltage Direct Current)system generally likes a negative resistance,which could reduce the damping of system,cause DC oscillation and reduce the system stability.The system power oscillation is restrained by controlling the superconducting magnetic energy storage device parallel connected to DC side,and the weak damping problem caused by MMC-HVDC system supplying constant power load is solved.By building the small signal model of double-terminal MMC-HVDC system,the main factors affecting the stability of MMC-HVDC system are analyzed by small signal stability analysis method,and the effectiveness of the proposed DC oscillation mitigation method is verified.A double-terminal MMC-HVDC system model is built in MATLAB/Simulink and time-domain simulation is carried out.Compared with the control strategy by changing con⁃troller’s power damping,the simulative results show that the proposed control strategy can effectively suppress system oscillation and improve system stability.

关 键 词：MMC-HVDC 直流振荡 小信号稳定性 超导磁储能装置 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM26[一般工业技术—材料科学与工程]