Network Losses Analysis Based On Sensitivity And Network Parameter Comprehensive Optimization

Network loss is an important issue of economy in the electric power system, and is an important technical and economic indicator that measures and checks production and operation of power supply enterprises, thus analysing network loss becomes especially important. The analysis of the network is to identify various factors about the changes of it, based on which we can draw a conclusion, then formulate practical measures to reduce loss and improve the management of the line loss.This paper examines the existing network loss analysis method, based on a sensitivity analysis of the network loss and the use of particle swarm optimization strategy of the network parameters are studied.Firstly, the conjugate voltage, current sensitivity of the network parameters is deduced, and then this paper further deduce the sensitivity that network loss affects network parameter. The use of sensitivity analysis for the net loss is to determine the network parameters on the degree of influence of power loss. The analysis of the net loss provides a simple method. This method, based on electrical network theory, uses the correlation matrix to transform the relationship between resistance and slip, and then seek partial derivative of network parameters to arrive sensitivity. Using the method to analyze net loss can know which parameters the greatest impact on the wear and tear and changes in the original network parameters can be derived a net loss of variation, qualitative, quantitative analysis of the network without re-calculation of loss trend to avoid the problems of power flow calculation iteration and convergence.Secondly, using of particle swarm optimization, as well as secondary particles presented in this paper, considering comprehensive fees as the objective function, by working out heuristic rules and concluding the optimal starting point between lines and transformer economic current interval is for optimizing the network parameters and give optimal strategies of lines and transformers to direct power system plans and construction.On this basis, further analysis into the impact of power on the network loss is given into the power of the net loss of sensitivity.The sensitivity of the positive and negative nodes is to identify whether increasing the injected power is conducive to reducing power loss or reducing the injected power is conducive to reducing power loss.In this paper, all the algorithms are based on IEEE-14 bus system, through the Matlab simulation platform for analysis,simulation results show that the proposed algorithm are feasible.