摘要
针对传统下垂控制难以保证微网孤岛模式下负荷分配准确的问题,通过对功率分配特性的深入分析,得到了额定功率和线路阻抗不匹配是造成分配不准确的根本原因,在此基础上提出了一种依靠静态修正下垂增益来改善功率分配特性的方法。该方法不会改变传统下垂控制方程的形式,对系统动态特性和稳定性无显著影响,对微网运行电压的影响也较小。在Matlab/Simulink仿真平台上验证了所提改进方法的有效性。
In view of the conventional droop control is difficult to guarantee the load distribution accurately in the is- landed mode micro-grid, this paper comes to the conclusion that the mismatch of rated power and line impedance are the root cause of inaccurate distribution through in-depth analysis of the power distribution characteristics, and an im- proved method depending on static correct the droop gain to improve power distribution characteristics is proposed on this basis. This method does not change the equation form of the conventional droop control, and has no significant effect on the system dynamic performance and stability, the impact on the operating voltage is also lesser. The effec-tiveness of the improved method is verified on the Matlab/Simulink simulation platform.
出处
《电测与仪表》
北大核心
2015年第14期33-38,共6页
Electrical Measurement & Instrumentation
关键词
微网
孤岛模式
下垂控制
负荷分配
下垂增益
micro-grid, islanded mode, droop control, load distribution, droop gain
