The Study On Method In Computing Theoretical Net Loss In Distribution Network

Net loss is an important economic guideline and rate of net loss ranks the technical and administrant level in power system. Exact computing of rate of theoretical net loss provides the engineers in power system with data to make out content of net loss and adopt exact measure to reduce net loss.There is a lack of data for computing of net loss and it is difficult to get accurate result. Based on the characteristic above mentioned, the paper brings forward a new method. First of all, this paper sorts the classifies the types of loads and makes up the curve of load. In low-voltage network, the paper considers the unbalance in three phrases and direction of main line. The paper analyzes the influence of direction of main line and distribution network, and adopts the real-time value of unbalance in three phrases to compute net loss. Direction coefficient is first brought forward and computing of net loss in low-voltage network is improved based on method of bamboo section.According to the relation between capacity of transformer and typical curve of load, curve of unmeasured transformer can be estimated. An improvement to compute the line loss of distribution transformers considering voltage fluctuation and excitation current's infection to loss of transformer.With the guide of "Technology Guideline of Computing Net loss", visual software on windows operation system is developed.