The Distributed Power Distribution Network Of Jiangmen Running Influence Key Problems Research

Distributed power is different from the centralized power, long distance transmission, large interconnected network of traditional forms of power generation, power in tens of watts to tens of megawatts range, load distribution in the nearby environmental, economic, efficient, and reliable way of generating. It can afford to save energy, cut a peak to fill the valley, the installation of transmission and distribution equipment, reduce the line loss, improve power supply reliability and economic benefit.With the rapid development of distributed power supply in power system, its permeability is more and more high. But at the same time, with the main system of distributed power grid to grid and attached to the power supply has also brought a series of problems, especially in the distribution network, in three aspects, first, is to power other user electric energy quality produce potential effect. The future is a digital society, the requirement of power quality will be more and more high. Any result of harmonic, transient, voltage sags and disturbance caused by deviation will cause the drop of power quality. In second, will have a significant impact on relay protection. Because of the distributed power supply capacity of small, low voltage, usually directly through the transformer in distribution power system. Distributed power supply makes the distribution system from the single power radiation type network into two terminal or multi-terminal network. The original distribution network protection and auto-reclosing design structure to must undertake corresponding adjustment and change. Otherwise, will make the distribution network fault can not be timely, accurate resection, affect the stable operation of power supply system, power supply equipment damage. Third, the influence of power grid fault recovery. Distributed power grid, power distribution system of the structure and operation will have great changes. In addition, due to the distributed power supply type is numerous, the mathematical model and the grid task are not the same, not in accordance with the conventional grid in the power processing, the distribution network fault analysis and judgement, and puts forward the correct and effective power outage recovery strategies, help the dispatchers of fault isolation regions, as much as possible to restore the fault region of the power supply, the fault losses to a minimum in relevant research is very important.The article combines Jiangmen actual situation of distribution network on the above three aspects to carry on the theoretical analysis, the study of distributed power supply system for Jiangmen distribution network the influence of several key issues, and gives the example, has achieved the anticipated effect.