Research On 66kV Distribution Network Generalized Load Model With Photovoltaic Power Station

The development of electric power industry is an important guarantee to ensure the stable operation of the national economy and the improvement of the living standard of the residents.In order to cope with climate change and energy crisis,the effective use of renewable energy,including photovoltaic power generation,has become a national strategy.As a typical representative of renewable energy supply,photovoltaic power generation showed strong momentum of development.How to effectively use photovoltaic power generation has become an urgent problem to be solved.In this study,the western region of Liaoning 66kV distribution network in photovoltaic power station access when the generalized load model research,aims to propose a generalized load model for typical power supply area,development for power system simulation software,and improve the quantitative analysis of the influence of grid connected photovoltaic power station and provides reference for improving the utilization rate of photovoltaic power generation.According to the generalized load model effectively,find out the method to solve the corresponding problem and strategy,which can improve the degree of automation of power system and effectively improve the main grid photovoltaic power plants and symbiotic relationship,effectively enhance the active electric energy market reform,trade and other aspects have important theoretical significance and practical value.The generalized load model takes into account the dynamic characteristics of the 66kV power distribution network,the dynamic change of the power supply and the reactive power compensation devices,and the mutual influence of the active power and reactive power.This study is based on the western Liaoning power grid load modeling.In addition to the classical static load model and motor load model,the power flow voltage characteristics,dynamic characteristics and their mutual effects are also studied.Due to the difference of resistance parameters,the relationship between power flow and voltage is also different.The typical 66kV transmission line system is studied,which is relatively easy to obtain the measured data.This research focuses on the research of power load model and its parameter identification.This paper designs a generalized load model of 66kV distribution network with photovoltaic power station,and the method of optimizing the power parameters and the realization process.Based on the optimization of the power parameters of the active load data equation of the 66kV line,the three optimization constants of the relationship between the power and the voltage at the two ends of the general nonlinear line are calculated.This paper provides a solution for the load model and its parameter identification of power network,and provides technical support and relative perfect simulation platform in the planning and simulation analysis of power transmission and distribution system.