Analysis And Countermeasures To Reduce Low-voltage Line Loss Of Distribution Network

Electric energy has been one of the most widely used energy in our country and around the world, but the electric energy waste in electric power grid reduces the utilization efficiency of energy seriously. Distribution network line loss has been studied in this paper, and the work details are as follows:(1)Research on present situation of distribution network loss reduction and preventing electric larceny shows that management loss of distribution network line loss should be solved urgently, and the traditional preventing electric larceny equipment has certain limitations.(2) Analysis on reasons of distribution network line loss come to the conclusion that five factors are important for distribution network line loss. Investigation and analysis on the Causes of line loss in Hua Nan Da Lian show the management factors are the main cause of distribution network line loss. From the data for electric anti-stealing, we can see the stealing electricity phenomenon is very serious and dominating of management loss, some effective measures of preventing power stealing must be implemented to prevent this illegitimate behavior.(3) Distribution network line loss calculation methods have been studied, and the ideal calculation method has been put forward by comparing the advantages, disadvantages and applicability. Countermeasure Research for distribution network loss reduction has been introduced according to technological loss and management loss of distribution network. This paper put forward six measures of reducing loss by technology, such as rising the voltage classes, reactive power compensation, reasonable selection of transmission line, simplifying voltage grade, using energy-saving transformer and replacement of high energy consumption equipment. We also put forward four measures of reducing loss by management, such as hierarchical management, index management, marketing management, low voltage line loss preventing electric larceny.(4) Practicable loss reduction strategy has been proposed against to Dalian distribution network, and the actual effect of reducing losses has demonstrated the effectiveness of this strategy. Anti-stealing equipment for low voltage commercial users and domestic users has been proposed to prevent electric larceny, and we do the hardware design of anti-stealing system.