Study On Technical Measures Of Low Voltage Comprehensive Treatment In Rural Power Grid

With the rapid growth of rural power load and the change of the load nature,the pressure of power supply in rural power grid is increasing year by year,the problem of "low voltage" in part of the rural area arises again,and it seriously affects the people’s normal production and life,restricts the development of rural economy.Therefore,analyzing the features of the current and future rural power grids,analyzing the causes of low voltage,analyzing the existing problems in the process of low voltage control,and putting forward the targeted improvement measures are of great significance to solve the problems of low voltage in rural power grid and improve the quality of power supply and guarantee people’s normal production and living order and promote the development of rural economy.This paper firstly introduces the characteristics of the rural power grid,and analyzes the causes of the low voltage of the rural power grid.In this paper,the relationship between the reactive power and voltage,the three-phase imbalance and the voltage are introduced in detail,and building the rural power distribution station simulation model by the MATLAB software and to analyze the power quality problems such as low voltage and harmonic pollution caused by unbalanced three-phase load and lack of power in detail.Then,based on the key of low-voltage control in rural power grid,a new type of low-voltage static dynamic reactive power compensation device(TSVG)is proposed for 0.4kV voltage grade distribution grid.This paper expatiates in detail the principle of the device,the key technology and the main functions of the device,and by building a simulation model proves that the device has the functions of reactive power compensation,harmonic control and compensating unbalanced current.So it can be widely used in low voltage control and other power quality improvement.At the end of this paper,the technical implementation of the three cascade adjustion is introduced in detail from the aspects of information transmission,substation voltage and reactive power control,medium voltage line voltage reactive power control and substation voltage and reactive power control.Then,through MATLAB software,analyze the implementation of the three cascade adjustion process,compared with the traditional voltage and reactive power control,it is clear that the use of three cascade adjustion to control voltage is more effective.