Research Orn Economic Operation Technology Of Power Supply In Distribution Area

The power distribution area is mainly composed of distribution lines,distribution transformers,10 kV bus bar and electricity equipment's.After distribution area built,there is long-term and unmanned regulatory problem:All transformers are put into operation completely no matter how much the transformer load rate is,distribution transformer is in the state of no load,overload or uneconomic operation;the use of high-power inductive household appliances are utilized,which leads to distribution area lack of reactive power,resulting in the user terminal voltage on the low side.In order to realize the efficient utilization of electric energy,provide high quality and reliable power for users.Therefore,it is necessary to study the economic operation of the power supply in the distribution area.This paper presents two aspects of the economic operation of distribution transformer and reactive power compensation,which are mainly as follow:(1)The selection criteria of distribution transformer model and economic capacity are obtained,by comparing and analyzing of different types of distribution transformers in distribution area.(2)In the light of the actual power supply,according to the principle of economical operation of a single transformer and the technical requirements for the parallel operation of two transformers,a method for calculating the differential loss of transformer parallel operation is presented.(3)Taking a typical distribution area as an example,the relationship between the transformer operating mode and the load characteristics is studied.The power loss of transformer under different load rate and different operation modes is calculated.Based on the mentioned before,the operation mode of transformer is adjusted to reduce the energy loss of the transformer in the process of energy conversion.(4)Aiming at the phenomenon that compensation point is focused on the end of the line,a method of Load Power Impedance Moment is put forward,the compensation position determined by this method is uniformly distributed on the 10 kV feeder,making up for the lack of sensitivity method.(5)Combining reactive compensation benefit and investment cost,the model of reactive power optimization in distribution area is established with the aim of maximum net income,the standard genetic algorithm is used to improve the fitness function,the initial population and the selection operation,so as to determine the optimal compensation capacity.(6)The simplified model of the distribution area is verified in the order that involves firstly determining the reactive power and then determining compensation capacity,finally the reactive power optimization scheme is obtained.By comparing the results with the other two methods,it can be seen that this method is more effective than other methods.In this paper,an improved scheme for the economic operation of distribution transformer and an optimization method for reactive power compensation in distribution area are presented,it can effectively reduce the power loss in the power supply of the distribution area,and the node voltage is obviously improved,achieving good economic benefits.Therefore,the research results of this paper are of great significance to the economic operation of the power supply area.