Research On The Integrated Control Strategy Of PV Micro Grid

With the world population growth and non renewable energy has been reduced, the world in energysupply has two outstanding problems: one is the energy transport problem with much land and few people;one is the use of renewable energy. With these problems, emergence of photovoltaic micro grid technologycan well solve these two problems. Solar energy as an inexhaustible be inexhaustible clean energy and nopollution, no ground for blame as the best alternative energy sources of coal and oil; micro grid technologyfor power supply with much land and few people or the island, but also greatly reduce the construction costof power supply and power plant maintenance difficulty.Now countries are increasing and the research on this field, but because of photovoltaic micro gridsystem is complex and changeable, environmental conditions, the establishment of laboratory has thecertain difficulty. So the dynamic simulation model is established by computer, analyzed and proved thefeasibility and stability of the simulation results.This topic through the establishment of simulation platform of microgrid operation control, in the Matlab/Simulink simulation environment, the model of photovoltaic cells, photovoltaic micro grid control strategy,distributed micro grid control strategy and micro power integrated control strategy model. In the analysis ofprinciple are given based on the parameter design method and model structure, the simulation results verifythe correctness and effectiveness of the model. The simulation results show that the model can be used inSimulation Research on access to microgrid operation control and distributed power and network, and hascertain versatility and expandability.Firstly, introduces the development status of the development of the micro grid as well as the domesticand foreign, and the standard solar cell simulation model is established according to the photovoltaic powergeneration principle, the maximum power point of maximum power output control photovoltaic batterytracking (MPPT) algorithm.Secondly, in the micro grid in order to make the PV grid connected inverter voltage to the power gridreal-time tracking, design the synchronization control strategy of a new type of photovoltaic grid connectedinverter, which avoid the deadbeat control and repetitive control, robust dynamic response is slow, but also inherits the advantages of the two, designed a new type of a composite control strategy, which makes themethod that improves the response speed of the system and improve the output waveform, and caneffectively restrain the perturbed nonlinear interference signal.Analysis of distributed power microgrid PQ control, the PV control principle and method, on the basisof the design of a new type of PQ-PV compound control, and the principle of the three strategies of thecontrol structure, simulation model is established, and a method of design according to the parameters ofsimulation models.Finally, design integration of the above model, the micro grid system control method and theequivalent control method, establishing a mechanism for islanding operation effectively andsynchronization, and the simulation results show the feasibility and effectiveness of the model.