《电力自动化设备》

引用本文:	马文忠,丁安敏,周冠宇,赵雨,张彦,张奎同,董磊.基于超导磁储能装置的MMC-HVDC系统直流振荡抑制方法[J].电力自动化设备,2020,40(9):
	MA Wenzhong,DING Anmin,ZHOU Guanyu,ZHAO Yu,ZHANG Yan,ZHANG Kuitong,DONG Lei.Superconducting magnetic energy storage device based DC oscillation mitigation method in MMC-HVDC system[J].Electric Power Automation Equipment,2020,40(9):

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基于超导磁储能装置的MMC-HVDC系统直流振荡抑制方法
马文忠¹, 丁安敏¹, 周冠宇¹, 赵雨¹, 张彦², 张奎同², 董磊¹
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

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。

关键词: MMC-HVDC 直流振荡小信号稳定性超导磁储能装置

DOI：10.16081/j.epae.202008020

分类号:TM721.1;TM26

基金项目: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)

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

MA Wenzhong¹, DING Anmin¹, ZHOU Guanyu¹, ZHAO Yu¹, ZHANG Yan², ZHANG Kuitong², DONG Lei¹

1.Institute of New Energy, China University of Petroleum(East China),Qingdao 266580, China;2.Shandong Energy Group Co.,Ltd.,Jinan 250014, China

Abstract:

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 dam-ping 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 controller’s power damping, the simulative results show that the proposed control strategy can effectively suppress system oscillation and improve system stability.

Key words: MMC-HVDC DC oscillation small signal stability superconducting magnetic energy storage device

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