Research And Development Of Flow Feeding Four Quadrant Converters And Monitoring System

The construction of the Snoopware of Reciprocal Power-fed and Self-restrained Converter System is simple and the test system has high efficiency,in addition,the dc side's energy cycle of system can substantially reduce the demand of capacity of power grid and four quadrant converter.Paper designs the monitoring software of the system.Firstly analyzes the realize functional and design requirements of monitoring and control system,and then introduces the design thought and implementation method of monitoring and control system software by flowchart.Mainly includes the communication module,the main interface,PC control module and database module.Paper analyzes the topology of the main circuit of four quadrant voltage type PWM rectifier and working principle,and modeling mathematics model of system and the current feed-forward decoupling model based on two phase rotation(d,q)coordinates system.Paper briefly expounds SVPWM modulation method of the four quadrant voltage type PWM rectifier.According to the principle of four quadrant voltage type PWM rectifier finally determine the whole design scheme of system,further analyzes the system of double closed loop control strategy.Finally builds simulation model experiment,debugs the main circuit and PI controller parameters through MATLAB,further verifies the feasibility of system design scheme.Paper designs the hardware circuit of four quadrant voltage type PWM rectifier of the system,main contents have power switching device of model selection,parameter design of main circuit and the design of control detection circuit.And based on TMS320F28335 chip in CCS5.4.0 environment puts forward the software design scheme of four quadrant voltage type PWM rectifier control system,main contents have the main program and interrupt service program design.Finally tests software design method on the low pressure experiment platform.In order to extend harmonic compensation function module of Snoopware of Reciprocal Power-fed and Self-restrained Converter System,paper researchs the harmonic and reactive power detection and compensation control method,and on the basis of regular functions in four quadrant PWM converter,implements harmonic compensation control method.The correctness and feasibility of the control method are verified through MATLAB simulation and practical experiment platform.Paper considers the Snoopware of Reciprocal Power-fed and Self-restrained Converter System as the research object,designs the PC monitoring software based on CAN bus,directing against the four quadrant voltage type PWM rectifier system,using TMS320F28035 as main control chip completes the overall hardware and software design effort,combines with low pressure experimental platform to verify the validity of the design.