Research On Method Of Harmonic Controland Reactive Power Control In Microgrid

Microgrid as a broad future application of new type power system power grid structure,its cheap, environmentally friendly power generation mode, distribution, flexible mode oftransmission, the resource increasingly drying up, concentrated in large power gridaccidents today, has become a research focus on the high-profile. But so far, the microgridresearch is not very mature, often encountered control method is not accurate, the problemsuch as unstable running scheme. Especially a large number of distributed power supply ofthe microgrid parallel operation greatly influence the power quality, and broughtuncertainty to power flow distribution. Microgrid as the research object, the impact on thesystem of distributed power supply is considered in this paper, suitable for harmonicharness and reactive power control of relevant methods.At first, the basic structure of micro grid, the harm of harmonic and reactive powerdistribution and micro grid’s influence on the system is expounded in this paper. Putforward the principle of common harmonic governance and reactive power control method.According to the characteristics of distributed power supply, to establish the correspondingmathematical model, summarizes their way of grid interface. In view of the micro systemsespecially distributed power grid harmonic carried on the thorough analysis, put forwardthe harmonic control scheme based on shunt active filter. This paper studies the distributedpower special node types in the processing means of Newton-Naphson power flowcalculation methods. Summarize a set of suitable for microgrid of Newton-Raphson powerflow calculation process. And respectively from the distributed power type, capacity, accessto the location of node voltage, microgrid system network loss is studied. By improvedgenetic algorithm, is proposed based on the reactive power optimization of geneticalgorithm, based on the established33nodes microgrid system for example, verify theoptimization scheme is feasible. Finally, introduce the multi Agent system to try micro gridof reactive power control, abnormal in micro grid operation, through coordination Agentworking at all levels, verified the system real-time performance and reliability. Multi Agentsystem for the future in-depth application in microgrid, provides some ideas.