Improved Adaptive Virtual Impedance Droop Control for Different Capacities
When a distributed power source intervenes in an island microgrid through inverters of different capaci-ties,it is necessary to consider the stability of inverter power distribution,voltage and current.This paper proposes to dynamically adjust the virtual impedance through the reactive power deviation of the two inverters to solve the problem of power equalization caused by inconsistent line impedance.The power control loop is redesigned,and the integration link is added after the deviation between the actual power and the given power,and the frequency and voltage can be self-adjusted with the system operation by dynamically adjusting the droop coefficient.The strategy proposed in this paper can quickly realize the reasonable distribution of power,and self-healing of frequency and voltage.Finally,a simulation model is built on the MATLAB platform to verify the feasibility of this strategy.
NETL
NSTL
万方数据
维普
