摘要
微电网的功率平衡和电压稳定控制通常采用传统的下垂控制,考虑到不同微电源(distributed generation,DG)之间等效阻抗差异使得无功分配不均,引起DG之间的环流进而增加损耗和降低系统电压质量。对此,提出了一种基于无功合理分配和系统电压稳定的改进型下垂控制策略,通过引入无功补偿环节和电压恢复机制实现微电网有效的无功控制。最后,在Matlab/Simulink仿真验证了该改进的下垂控制在实现无功合理分配和系统电压稳定的同时不影响有功的输出。
The traditional drop control is adopted for the power balance and voltage stability control of the micro-grid.Uneven distribution of reactive power due to equivalent impedance difference between the different generations(DG)leads to loop current between DG and,thus increasing the loss and reducing voltage quality of the system.In this regard,an improved droop control strategy based on reasonable distribution of reactive power and system voltage stability is proposed so to achieve the effective reactive power control by introducing reactive power compensation link and voltage recovery mechanism.Finally,the reasonable reactive power distribution and stability of system voltage without simultaneously the influence of reactive power output by the drop control is verified through the Matlab/Simulink simulation.
作者
高坤
郑帅峰
辛宁怡
崔艳
黄敏
GAO Kun;ZHENG Shuaifeng;XIN Ningyi;CUI Yan;HUANG Min(State Grid Changde Power Supply Company,Hunan Changde 415000,China)
出处
《电力电容器与无功补偿》
北大核心
2018年第5期149-154,共6页
Power Capacitor & Reactive Power Compensation
关键词
微电网
孤岛模式
改进下垂控制
无功补偿
电压恢复
分布式发电
micro-grid,island mode
improved droop control
reactive power compensation
voltage recovery
distributed generation(DG)
