Component Multiplexed Three Phase Low Voltage Power Quality Regulator Research On Main Circuit Topology And Control Method

Under the trend of rapid development of the smart grid,especially the widespread use of microelectronic devices,the power quality problems in power grids become more and more serious,and how to effectively improve the quality of power is undoubtedly become a power of today's power system is a very important research direction.To develop a new type of power quality regulator to adapt to continuously improve the quality of smart grid power supply requirements,reflects a considerable theoretical and engineering value.Firstly,the paper presents a novel flexible variable-mode power quality regulator,analyzes its working principle,compares several kinds of main circuit topology,and discusses the work of component multiplexing low-voltage power quality regulator in different modes.At last,a mathematical model based on the switching function is established.Secondly,it applies its orthogonality to all signals of three-phase circuit,focusing on a new generalized harmonic theory system.On the basis of generalized harmonic theory,the power quality disturbance detection algorithm based on generalized harmonic theory and generalized dqO orthogonal transform is analyzed deeply.Three-state hysteresis control strategy is adopted to realize the compensation of current and voltage disturbances.The three-state hysteresis control strategy is applied to the control of the variable-mode power quality controller(PMSM)with complicated three-bridge three-bridge main circuit structure,and the complex tracking speed and precision control capability is given.Optimal control method.Finally,simulation is performed via MATLAB/Simulink,the components of the multiplexed low-voltage power quality regulator detection circuit,control circuit and system simulation model,test the detection method,control strategy and topology of the correctness and practicality.In addition,the design scheme of flexible variable-mode power quality regulator control system is described in detail,and the hardware and software design scheme is realized by using DSP chip,which has laid a good foundation for the practicality of flexible variable-mode power quality regulator.