Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

Article retrieval

文章检索

首页 >> 文章检索 >> 最新索引

多逆变器并联的微电网无功均分控制策略研究

来源:电工电气发布时间:2023-03-04 11:04 浏览次数:234

多逆变器并联的微电网无功均分控制策略研究

宋帅超,秦斌
(湖南工业大学 电气与信息工程学院,湖南 株洲 412007)
 
    摘 要:针对在多逆变器并联的孤岛微电网系统中,各线路之间的阻抗不一致,无功功率不能按需分配以及逆变器之间出现环流等问题,提出了虚拟阻抗策略,采用 PR 控制代替传统的 PI 控制,提高系统的稳定性,减小环流对系统的影响,并在虚拟阻抗策略中引入自适应控制,使虚拟阻抗根据系统的无功功率和母线电压自适应调节,从而提高电能质量,仿真实验验证了该策略的有效性。
    关键词: 孤岛微电网;下垂控制;虚拟阻抗;PR 控制;自适应控制
    中图分类号:TM464 ;TM712     文献标识码:A     文章编号:1007-3175(2023)02-0023-06
 
Research on Reactive Power Sharing Control Strategy of
Microgrid with Multi-Parallel Inverters
 
SONG Shuai-chao, QIN Bin
(College of Electrical & Information Engineering, Hunan University of Technology, Zhuzhou 412007, China)
 
    Abstract: As the impedance of each line is different in the islanded microgrid system of multi-parallel inverters, the powerless power cannot be distributed according to need and the circulating current appears between different inverters. Therefore, the virtual impedance strategy is proposed in the paper. The traditional PI control is replaced with the PR control to increase system stability and decrease the effects of circulating current on the system. The adaptive control is introduced into the virtual impedance strategy to make virtual impedance regulate adaptively according to powerless power and bus voltage of the system, which raises the power quality. Finally, the simulation experiment verifies the validity of this strategy.
    Key words: islanded microgrid; droop control; virtual impedance; PR control; adaptive control
 
参考文献
[1] 孟明,陈世超,赵树军,李振伟,卢玉舟. 新能源微电网研究综述[J]. 现代电力,2017,34(1):1-7.
[2] 耿英明,侯梅毅,朱国防,刘洋,于昊,呼延天亮. 基于虚拟阻抗的微电网有功均分阻性下垂控制策略[J]. 电力自动化设备,2020,40(10):132-138.
[3] 冯培磊,陈潇雅,徐天奇. 微电网关键技术研究综述[J]. 水电与抽水蓄能,2020,6(3):45-49.
[4] 王二永,王帅. 基于自适应虚拟电阻的低压微电网下垂控制策略[J] . 电力系统保护与控制,2020,48(2):144-149.
[5] 赵巧娥,张乐乐,武晓冬,刘芳. 基于并联虚拟电阻的多逆变器控制策略[J] . 电力系统保护与控制,2017,45(15):30-39.
[6] ETEMADI A H , DAVISON E J , IRAVANI R . A Generalized Decentralized Robust Control of Islanded Microgrids[J].IEEE Transactions on Power Systems,2014,29(6):3102-3113.
[7] WAI R J, ZHANG Q Q, WANG Y.A Novel Voltage Stabilization and Power Sharing Control Method Based on Virtual Complex Impedance for an Off-Grid Microgrid[J].IEEE Transactions on Power Electronics,2019,34(2):1863-1880.
[8] HUANG Jing , LIU Xiaohua , LI Hongping .Control method of islanded microgrid to improve reactive power sharing and power quality[C]//2016 China International Conference on Electricity Distribution(CICED),2016:1-5.
[9] 李智,张春,金鹏,吕文齐. 基于自适应虚拟阻抗的下垂控制策略研究[J]. 黑龙江工程学院学报(自然科学版),2020,34(3):6-10.
[10] AN Ronghui, LIU Zeng, LIU Jinjun.Modified Adaptive Virtual Impedance Method to Compensate Mismatched Line Impedances in Microgrids[C]//2019 IEEE Applied Power Electronics Conference and Exposition(APEC),2019:1109-1114.
[11] 麦倩屏,陈鸣. 用于多微源低压微电网的虚拟阻抗反下垂控制[J] . 电力系统保护与控制,2018,46(1):96-102.
[12] 罗洋. 基于虚拟阻抗的逆变器并联控制策略研究[D]. 包头:内蒙古科技大学,2021.