电测与仪表2017，Vol.54Issue(4)：45-49,56,6.
微电网多逆变器运行的自适应下垂控制新策略
A new self-adaptive droop control strategy of micro grid inverters in parallel operation
摘要
Abstract
Due to the island operation of low voltage micro grid is affected by the influence of such factors as the non-consistence of line impedance,the traditional droop control can't distribute power according to the unit capacity of the distributed power (DG) reasonably,therefore this paper proposes a new self-adaptive droop control strategy.The paper analyzes the electrical characteristic of inverters in parallel operation and in the mode of the island operation and virtual impedance technology and the traditional droop control strategy.Then,it designs the virtual impedance and P-U droop control loop of inverter and remains traditional Q-f droop control loop unchanged.The principle of designing P-U droop control loop is based on utilizing the integral of active power P to lock the voltage difference and using sine function to solve the problem of output voltage falling over time caused by the integral,in the mean time,utilizing linear differential adjustment of traditional P-U droop control droop to improve the speed of adjustment and the design and distributes the active power P effectively.The simulation results show that,comparing with the deviating regulation of traditional droop control strategy,the proposed strategy can realize zero error output adjustment and not be affected by the changing of output impedance and line impedance.关键词
微电网/逆变器/并联运行/自适应下垂控制/虚拟阻抗Key words
micro grid/inverter/parallel operation/self-adaptive droop control/virtual impedance分类
信息技术与安全科学引用本文复制引用
杨旭红,何超杰..微电网多逆变器运行的自适应下垂控制新策略[J].电测与仪表,2017,54(4):45-49,56,6.基金项目
国家自然科学基金(61203224) （61203224）
上海自然科学基金(13ZR1417800) （13ZR1417800）
上海市电站自动化技术重点实验室开放课题(13DZ2273800) （13DZ2273800）
上海市科技创新行动技术高新技术领域重点项目(14511101200) （14511101200）
