The Research Of Distribution Network Line Loss Calculation And The Measure For Reducing Loss

At present, our country is in the 12th five-year plan period, our country electric power construction into a period of vigorous development, reduce the line loss for power supply enterprises is very important, line loss analysis and the calculation methods of power in urban distribution is the study of technical measures is very important theoretical and practical significance, it is because of this, the theory of line loss calculation method is also become the focus of academia and a power supply enterprise research object, technical measures and loss reduction has become the center of the power supply enterprise energy conservation and one of the important management task.From actual conditions, this paper first analyzes the research progress of line loss calculation at home and abroad, and then, from the most basic related power theory, this paper expounds the cause of line loss, classification, through the power grid company and the line loss management regulations of the state, after get on line loss of the basic theory, reveals the line loss calculation method has very important meaning to research, can help power supply enterprise appraisal network structure and operation mode of economy; Find out the excessive loss in power grid components and reasons of the loss; Through the assessment of the actual line loss is true, accurate and reasonable, the difference in value and the actual line loss and theoretical line loss, determine the degree of unknown loss, can measure the stand or fall of business management standardization degree; According to the theoretical line loss, the proportion of each conductor losses and transformer losses, targeted to the power grid loss too much link loss reduction measures, for the development of grid, improvement and planning to provide adequate scientific basis; Provide scientific theory for rational order line loss assessment index number; At the same time provide a variety of materials, theoretical line loss calculation is a fundamental work of power supply enterprise technology management and an important part of, for the production and operation of the power supply enterprise own management has important guiding significance and reference value.This paper introduced the method of equivalent resistance, through the establishment of distribution lines all equivalent resistance, power distribution lines of equivalent resistance, distribution of the equivalent resistance of the distribution transformer, the total power loss of distribution network, power distribution lines and the equivalent impedance model of distribution network, a variety of data relations in using the model in detail, the calculation method of equivalent resistance is deduced. In order to verify the feasibility of equivalent resistance method in actual production, on the above theoretical derivation, this paper its kinghsien power supply company is 10 kV substation 110kV ji lu temple 5882 routes for the actual line loss calculation, had been calculated using the method of equivalent resistance of the 10kV line loss, with a practice test the validity of the method of equivalent resistance and feasibility.Finally, based on the analysis of line loss calculation method, on the basis of further put forward the method of reducing line loss mainly should start from two aspects of management and technology, technical measures of reducing line loss is mainly introduced, and combined with the authors practice, the actual data analysis comparison, proposed five technical measures of reducing line loss:strengthen the power grid booster modification; To strengthen the economic operation of power grid and equipment; Do a good job in the grid reactive power compensation, adding reactive power compensation device; Reasonable planning of power grid structure, reduce power supply radius; With low loss and on-load voltage regulating transformer, gradually update the high loss of transformer, etc.