Research Of Voltage And Frequency Control System For Inverter In Distributed Power Supply System

With the rapid growth in electricity demand,energy and environmental issues have become increasingly prominent.New energy with its unique pollution,energy efficiency and many other advantages has attracted a wide range of attention and technical support.Distributed power generation technology to make full use of new energy sources,can give full play to the advantages of new energy.There to,reduce the burden of public power grid and to provide users with a variety of energy needs.Therefore,the coordinated control of distributed power supply system for the development of the entire power supply system is meaningful and significance role.The distributed generation through the inverter access to the grid,its related tchnology has also been a popular research field because of its flexible and rapid regulation performance and strong controllability.In this paper,the main research is to control the voltage and frequency of the circuit under the droop control strategy of the distributed power supply system.The mathematical model of the inverter under the park and Clark transformation under each coordinate system is established,and the two coupling components are decoupled,and then the voltage is designed.The distributed algorithm under the three loop feedback control and the droop control system,the distributed power system simulation platform and the structure foundation of the system software and hardware platform are obtained.Then based on the mathematical model,the specific parameters are calculated,and a single inverter experiment platform with DSP2812 as the controller is built.In the MATLAB/ The simulation platform of 4 distributed inverter systems is built in Simulink.The static and dynamic characteristics of the system are gradually improved by adjusting the droop control coefficient and the PI adjustment parameters,and the correction waveforms of voltage and frequency are extracted.Through the experiment and simulation,the voltage and frequency of single and multiple inverter systems are corrected,and the results are analyzed to verify the effectiveness of the whole system designed in this paper.