The Analyses And Solutions Of The Distribution Area's Voltage Deviation Problem

In recent years,with the expansion of industrial scale and the development of science and technology,the electricity consumption of each national economic departments continue to increase,as well as the degree of electrical appliances.The users have higher requirement on the quality of voltage.How to further improve the quality of voltage has become the target of power supply enterprise.Voltage quality,such as voltage deviation,frequency deviation,voltage imbalance,harmonic voltage and so on,is not only related to user load but also has relationship with the structure of the power supply and distribution network.For distribution lines,the long transmission distance,the large transmission capacity,the small wire cross section and other factors will increase the voltage loss of the line,so as to produce voltage deviation.In the distribution network,if voltage quality problems occur,we need to find the key reason and take reasonable measures.This paper studies power flow algorithm which is suitable for the medium and low voltage distribution network according to the characteristics of the existing distribution network,by means of JGraph T programming which works in the JAVA environment;At the same time,this paper also found simple power system models to simulate and analyze different voltage regulation methods such as new platform area,increasing the size of the line,increasing the reactive power compensation,adjusting the distribution transformer,adjusting the three-phase load,adding the line voltage regulator,the installation of intelligent power quality control device and so on;Combined with the actual low voltage case,We analyze its effect on voltage deviation and economic benefit,and choose the most suitable regulating method of the distribution network.We hope to provide methods to solve the problems of distribution network voltage deviation in practice.