Control Strategy For Micro-grid Operation

With the increasingly tense primary energy, new energy development and use ofmore and more attention has been paid. This new energy-based micro-grid generationtechnology has been growing, solar photovoltaic power generation is undoubtedly themost representative and promising one. Therefore conclude inverter control regular,and to extract the significant features of general-purpose modular control model,control strategy on the micro-grid research has important practical significance.In this paper, simulation analysis of the traditional master-slave control strategyand control strategies such as micro-grid operation in the existence of defects, andproposed to the master control from the control with the combination of suchintegrated control strategies. The strategy according to different types of DG, to take adifferent control methods to achieve micro-power state transitions in the networkstructure or process of the seamless handover of a micro-grid to improve stability.According to the paper, firstly, analysis of the inverter control, inverter to meetthe stable operation of the micro-grid requirements. Secondly, according to theinverter main circuit topology, the output voltage inverter characteristics in such areasas research, the specific design of the inverter unit output filter parameters, includingcurrent-loop control and software, including phase-locked loop power controller,voltage double loop current controller, the establishment of a PQ, V/f and Droopthree control simulation models and control of photovoltaic maximum powersimulation model, validated by simulation models of photovoltaic cells has goodadaptability and dynamic. Finally, the design of the three micro-simulation model ofnetwork operation control strategy, integrated control strategy simulation with adifferent distributed power characteristics of the integrated use of the PQ and Droopcontrol model used in simulation to obtain a comprehensive control strategy ofmicro-power run mode, the operating characteristics of the load changes, with bettersteady-state and dynamic performance, integrated master control and the respectiveadvantages such as control strategy.