Research And Realization Of SVC Device Based On DSP And FPGA

Inductive load in power grid requires a large number of reactive power,resulting in low power factor,loss of electric energy,deterioration of power supply quality,and even impact on power system security.The solution is to invest in capacitive reactive power to exchange and compensate the inductive reactive power.The traditional reactive power compensator is controlled by the single chip microcomputer to compensate the reactive power of the power grid system by the capacitor bank.Reactive power compensation scheme of the project is in the traditional reactive power compensation method based on the parameters accurately and real-time measurement of power system,the command speed,nuclear chip to many data computing capability of DSP and FPGA as the control center to complete the operation,hardware design,control system software and,modeling and Simulation of control system.This paper introduces the principle and significance of reactive power compensation,analyzes the related theory and algorithms for reactive power compensation in low voltage system,selected the TSC type device of reactive power compensation method for the SVC system,expounds the selection principle of the capacitor into the capacitor capacity allocation principle,discusses the reactive power compensation control the strategy,selected the instantaneous power algorithm of capacitor switching,put forward a comprehensive weighted voltage and reactive power control strategy based on.The hardware block diagram of the project is completed,and the hardware of the control system is designed on this basis,including the hardware modules of DSP and FPGA,driving circuit,communication module circuit,man-machine interface and so on.The hardware circuit of each module and the peripheral hardware circuit of the control chip are completed in combination with the design target of this subject.Plan.In the design idea of the hardware of SVC device and the hardware module selected by the control system,the main program structure of the controller and the flow chart of the local software are designed,such as the system master program,the A/D sampling subroutine,the keyboard subroutine,the display subroutine,the protection subroutine,and the communication subroutine,and so on,the SVC control system is completed preliminarily.Software program implementation.The SIMULINK reactive power of 380 V low-voltage power grid simulation model without compensation scheme was built,the model set up different perceptual load simulation system can be used to detect the change of reactive power,make real-time response,showing dynamic compensation characteristics,to improve the power factor.According to the experimental results,the feasibility of the hardware and software design and control methods in the system and the feasibility in practice are verified.