TITLE:
An Integrated Control Strategy Adopting Droop Control with Virtual Inductance in Microgrid
AUTHORS:
Jianjun Su, Jieyun Zheng, Demin Cui, Xiaobo Li, Zhijian Hu, Chengxue Zhang
KEYWORDS:
Microgrid; Integrated control; PQ control; Droop control; Virtual impedance
JOURNAL NAME:
Engineering,
Vol.5 No.1B,
January
15,
2013
ABSTRACT: As there exists sorts of distributed generators in microgrid, an integrated control strategy containing different control methods against corresponding generators should be applied. The strategy in this paper involves PQ control and droop control methods. The former aims at letting generators like PV output maximum power. The latter stems from inverter parallel technique and applies to controlling generators which can keep the network voltage steady to make the parallel system reach the minimum circulation point. Due to the unworthiness of droop control applied in low-voltage microgrid of which the impedance ratio is rather high, the paper adopts the droop control introducing virtual generator and virtual impedance. Based on theoretical analysis, simulation in Matlab is also implemented to verify the feasibility of the strategy.