摘要
根据低压微电网线路主要呈阻性的特点,对有功功率和无功功率进行了解耦控制,有功功率分配采用电压下垂控制,无功功率分配采用相角下垂控制。在分析了下垂控制模型的基础上,考虑到分布式电源的相角由频率和初相角两部分决定,提出了虚拟频率的概念,并将其引入到电压?相角下垂控制策略中,将下垂控制时分布式电源虚拟频率的变化转换为初相角的变化。算例仿真结果验证了所提方法的可行性。
According to the resistive characteristic of low-voltage microgrid, decoupling control of active power and reactive power is achieved. Voltage droop control method was used in active power distribution, and phase angle droop control method was used in reactive power distribution. On the basis of analysis of droop control model, since the phase angle of distributed generator is determined by two parts： frequency and the initial phase angle, virtual frequency which is proposed in this paper is applied to the voltage/phase-angle droop control strategy. In the improved control strategy, the change of virtual frequency converts into the change of the initial phase angle. Feasibility and effectiveness of the strategy is confirmed by Matlab simulation.
出处
《电网技术》
EI
CSCD
北大核心
2013年第12期3331-3335,共5页
Power System Technology
基金
国家863高技术基金项目(2012AA050217)~~
关键词
微电网
逆变器
下垂控制
虚拟频率
初相角
microgrid
inverter
droop control
virtualfrequency
initial phase angle
