The Modeling And Simulation Of Three Types Of Distributed Power

With the increasingly seriousness of environmental pollution and energy shortages, andthen the defects of the traditional large capacity of centralized power, the distributedgeneration technologies get more and more people’s attention. The distributed generationbecomes a great potential for development in the renewable power industry energy using withits unique advantages, rational development and utilization of distributed power has becomean important measure to improve the economy and stability of power grid operation. Andpower industry experts and scholars at home and abroad consider that the distributed powergeneration system with a large grid parallel operation is an effective method of reducingresource consumption, and it is an important way to improve grid stability and flexibility.In recent years, the installed capacity of the distributed generator sets and theconstruction scale of the distributed power plants are expanding, large-capacity distributedgeneration systems will bring some quality and security stability issues to the grid power, therandomness and volatility of the distributed power is not conducive for the stable operation ofthe power system. So grasping the output characteristics of the distributed power generationsystem, is the key to study the effect of the distributed power in the grid.In this paper, firstly introduced the development and the superiority of three typicaldistributed power systems such as wind power generation, photovoltaic cells powergeneration and micro-gas turbine power generation at home and abroad, explaining that thedistributed power generation is very promising for development in China. Then described theworking principle of wind power generation, and made a simulation to study the currentworld wind power technology research focus (doubly-fed VSCF wind turbine) by usingMATLAB/Simulink, the result of the simulation shows that the doubly-fed wind turbine willbring some impact to the stability of the grid by using the voltage control and reactive powercontrol. And described the principle of the photovoltaic power generation, created a model ofthe photovoltaic cell power generation system, the output characteristic curve of the modelshows that the output power of the solar battery will be influenced by the weather factors, thelight intensity and temperature could change the output power of the photovoltaic cell significantly, using the MPPT control could keep the photovoltaic cell working in the vicinityof the maximum power point. At last, described the working principle of the micro-gasturbine power generation and created a model of micro-gas turbine power generation system,the simulation results show that the micro gas turbine model could adjust its output power asthe load changes. The paper finally made a simulation study of wind power, photovoltaic andmicro gas turbine hybrid micro-grid composed, the simulation results show that: the timeseries of the micro gas turbine power control strategy can stabilize power system wind andphotovoltaic system power output fluctuations effectively, and it could get the goals that windfarms, photovoltaic power plants and micro-gas turbine power plant could commonly sent thestable output power to the grid.