| With the improvement of the voltage quality level,the operation and control of the distribution network have become the key.The current concern is to control the reactive power voltage level by estimating the power flow state of the distribution network.Under this background and thinking,this paper focuses on the reality of Songyuan Power Grid to carry out research on the estimation of the power flow network state of power distribution,and controls the voltage level of the distribution network based on the result of the power flow state estimation.Its purpose is to improve the power distribution.The voltage level of the network is running,so the research in this paper is very important to improve the power quality of the user side.With the expansion of the energy gap,the popularization and use of distributed power sources has gradually increased,and higher requirements have been placed on the voltage and reactive power regulation of the distribution network after accessing the distributed power supply.At present,the most common way of voltage and reactive power management of the distribution network after accessing the distributed power supply is to compensate the layered partition by adding capacitors.When the voltage fluctuates,the system automatically inputs or exits the capacitor.However,this method can only adjust the bus voltage of 10 kV or 35 kV,which is powerless for the distribution network of lower voltage level.And because the control strategy is relatively simple,there are often certain errors.In some specific operating modes,there is a situation of over-adjustment,ignoring the accuracy of the control.In the process of reactive voltage control,the trend state estimation is very important and important.Estimating the power flow state can accurately read the current variable,voltage variable,phase angle variable,active power variable and reactive power variable in the power grid.In this paper,the grid voltage is accurately controlled by estimating the state of Songyuan Power Grid,and reasonable and effective control methods are adopted to achieve optimal voltage control.This paper focuses on the importance of reactive voltage,state estimation applicationand the importance of reactive power optimization.The introduction of state estimation and reactive voltage control at home and abroad is introduced in the introduction.The current research on power network component modeling and corresponding state estimation has a significant impact on voltage control.Under this background,this paper develops related reactive voltage control strategies.Firstly,the principle of grid modeling and the tools needed to build a distribution network model are introduced.Then the basic methods and principles of power flow state estimation are studied.The state matrix can be used to optimize the voltage level of each node.The key points are how to effectively improve the accuracy of the basic data of the power system,that is,to improve the system state.Rate proposes an effective solution.Based on the study of the principle of reactive voltage regulation,combined with the actual case analysis of Songyuan Power Grid,the tidal current and reactive voltage levels of Songyuan Power Grid are analyzed and calculated,and an effective voltage control scheme is proposed.The reactive voltage automatic control combined with the characteristics of the distributed photovoltaic access system is selected to use SVG(Static Var Generator)to manage the reactive voltage problem.The system voltage fluctuation is taken as the objective function,the compensation capacity is optimized as the constraint condition,and an example is verified by taking a regional power grid of Songyuan City Power Grid as an example.The final result shows that the optimal placement method of this paper can effectively suppress the voltage fluctuations in the system.Therefore,the research in this paper has important theoretical significance and practical value for improving the reactive voltage level of the distribution network. |
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