Design And Study On Control System Of Magnetic Valve Controllable Reactor

During the operation of China's power grid,due to the imbalance of reactive power,it often causes problems such as increased line loss,unstable voltage and reduced power factor.Not only that,as more and more shock loads and unreasonable use of reactive power compensation devices will aggravate the adverse effects caused by reactive power imbalance.Therefore,it is necessary to study reactive power compensation.Magnetic valve controllable reactors are used as reactive power compensation equipment because of its advantages of high withstand voltage level,continuously adjustable capacity and low cost have been widely used in the field of reactive power compensation.Since the reactive power compensation performance of the reactive power compensation equipment is greatly affected by the accuracy of the reactive power detection in its controller and the control strategy,this paper mainly focuses on the reactive power detection method and the control strategy of the magnetic valve controllable reactor In-depth study.This article first analyzes the structure and working principle of the magnetic valve controllable reactor in detail,on this basis,the Simulink simulation model of the magnetic valve controllable reactor is established;then the existing reactive power detection method is affected by harmonics For the problem of reduced accuracy,a reactive power detection method based on the principle of lockin amplifier is proposed.Through simulation and experiments,the proposed algorithm is verified to have high accuracy;then based on the dynamic reactive power compensation theory,combined with fuzzy PI control theory and the measures to improve the reactive power compensation speed,a Simulink simulation model of a reactive power compensation control system based on a magnetic valve controllable reactor is designed.The simulation comparison with the traditional PI controller shows that the reactive power compensation control system using fuzzy PI control is more robust in maintaining voltage and improving power factor.Finally,a reactive power compensation controller based on DSPF28335 as the main control chip and a series of hardware circuits and human-computer interaction systems are designed,and an experimental platform for reactive power compensation is built.The experimental results show that the entire set of reactive power compensation control designed in this paper The system is easy to operate,and the reactive power compensation speed is fast,which can reliably and accurately complete the reactive power compensation task.