Research On Power Loss Analysis Based On Parameter Estimation And Evaluation Of Energy Efficiency

:Currently, the energy and environmental issues become the focus of world attention; energy conservation is the common goals of all walks of life, as the consumption of energy-hungry power companies should pay more attention to energy loss reduction. After years of efforts the grid line loss rate has been reduced significantly, but in the face of the rapid increase in the rapid development of new energy sources, residents of high-loss business users are on the level of energy efficiency throughout the power grid challenges. Meanwhile, among the three elements of the model algorithm, device parameters, data collection that influences line loss analysis, and the low-voltage power distribution in data collection has always been lacked, while model algorithm that applied to collect data is complementary. With the popularization of information collection system, it’s necessary to improve the current line loss calculation method. Based on the current demand of grid energy conservation and loss reduction, this paper mainly studies the distribution network loss situation,measures of energy conservation and loss reduction, and energy efficiency evaluation method.Firstly, the paper analyzes the current situation of energy efficiency of power grid in our country, and the key point of energy conservation and loss reduction in distribution network is proposed. Combed the grid loss research status and development trend in the domestic and overseas, and points out the necessity and significance of the loss of grid research in China.Secondly, according to the characteristics of the parameters of the imperfect and error in the current grid loss calculation, on the basis of the analysis of the distribution network topology, this paper given solving method on different types of nodes in the distribution network as the basic unit of the branch parameter, introduced with a minimum two parameter identification method to solve the slip parameter, and made a general procedure for the entire distribution network parameter identification.Furthermore, sorting related concepts of grid loss, pointing out definition and classification of the theoretical line loss. The loss and calculation method of AC power transmission system are analyzed, power flow method will be introduced into the distribution network loss calculations radial distribution network loss calculation method using hierarchical power generation is presented.Then, this article proposes the energy conservation and loss reduction measures of power grid that mainly focus on energy-saving equipment replacement, analyzes the quantitative values of power and electricity saving of th five energy-efficiency methods, such as the transmission wire replacement, efficient transformer replacement, reactive power compensation device application, boost the transformation, the harmonic elimination filter device. At last, on the physical simulation platform energy saving validation is carried onFinally, in view of the lack of a comprehensive analysis of energy efficiency of the current grid, this paper puts forward a set of comprehensive evaluation method of energy efficiency, determines the energy efficiency level of power grid from the component indicators, operation indicators, integrated indicators and economic indicators aspects. What more this paper applies this method to the actual power grid for energy efficiency, points out the shortcomings and proposes the improvement methods.