Affiliations: Engineering Training Center, Shanghai University of Engineering Science, Shanghai, China
Correspondence:
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Corresponding author. Yingwen Long, Engineering Training Center, Shanghai University of Engineering Science, Room 1443, Shanghai, China. E-mail: 1825405229@qq.com.
Abstract: The difference of feeder impedance and the nonlinear load may deteriorate reactive power sharing and worsen the power quality, which may cause the breakdown of power supply in islanded microgrids. An enhanced discrete consensus algorithm considering information transmission delay is put forward in order to optimize the convergence dynamic. The proposed algorithm defines the independent iteration number of times variable for every agent, which can be transferred to its adjacent agents together with the communication data to control the times of the iteration calculation. The optimized control strategy is adopted for three-phase distributed generators to balance the reactive power sharing. Eventually, the simulation results show that the reactive power will be evenly shared among distributed generators in proportion to their rated capacity and the proposed algorithm achieves good dynamic performance during the transition.
Keywords: Reactive power sharing, distributed generator, discrete consensus algorithm, time-delay
