In this paper, a vector regulating principle of the phase and amplitude control PAC method for three-phase grid-connected inverters is presented.To solve the problem of heavy inrush current and slow dynamic response w...In this paper, a vector regulating principle of the phase and amplitude control PAC method for three-phase grid-connected inverters is presented.To solve the problem of heavy inrush current and slow dynamic response when system starts up, the starting voltage prediction control and the current feed-forward control are proposed and used, which improve the dynamic performance of the system in the PAC.The experimental results carried out on a three-phase grid-connected inverter proved the validity of the proposed method.展开更多
This paper presents a new inverter based on three-phase Boost/Buck-boost single-stage inverter. The basic configuration of the new topology and their fundamental principle are firstly introduced, the method of design ...This paper presents a new inverter based on three-phase Boost/Buck-boost single-stage inverter. The basic configuration of the new topology and their fundamental principle are firstly introduced, the method of design double-loop controller and sliding mode controller are clarified, analyzed and compared in the following. Finally the validity and feasibility of the new topology are tested by simulation. The results indicate that regulation of the voltage transfer ratio and output frequency can be realized optionally by the new converter, furthermore the harmonic distortion of waveform is low. So the inherent drawback of low voltage transfer ratio of traditional converter is effectively settled. This study may provide inspiration for further engineering application.展开更多
提出一种新颖的三相Boost型光伏并网逆变器,并对其拓扑、双环改进型分区SPWM控制策略、低频模态、储能开关关断电压尖峰抑制、高频开关过程、光伏电池最大功率点跟踪(maximum power point tracking,MPPT)、关键电路参数设计准则等进行...提出一种新颖的三相Boost型光伏并网逆变器,并对其拓扑、双环改进型分区SPWM控制策略、低频模态、储能开关关断电压尖峰抑制、高频开关过程、光伏电池最大功率点跟踪(maximum power point tracking,MPPT)、关键电路参数设计准则等进行了深入的分析研究,获得了重要结论。其拓扑是由输入滤波电容、中心抽头储能电感、三相逆变桥、三相输出滤波器级联构成,且在储能电感中心抽头与输入源负端间接有储能开关;其控制策略是对三相电网电压进行60°分区,以确保每个开关周期均满足Boost型变换器的工作机理。设计并研制了3kW 96VDC/380V 50Hz 3φAC逆变器,实验结果表明,这类逆变器具有升压比大、功率密度高、变换效率高、储能电感和输出滤波器小、并网电流质量高等优良性能,在单级三相低压并网逆变场合具有重要应用前景。展开更多
The Brushless DC Motor drive systems are used widely with renewable energy resources.The power converter controlling technique increases the performance by novel techniques and algorithms.Conventional approaches are m...The Brushless DC Motor drive systems are used widely with renewable energy resources.The power converter controlling technique increases the performance by novel techniques and algorithms.Conventional approaches are mostly focused on buck converter,Fuzzy logic control with various switching activity.In this proposed research work,the QPSO(Quantum Particle Swarm Optimization algorithm)is used on the switching state of converter from the generation unit of solar module.Through the duty cycle pulse from optimization function,the MOSFET(Metal-Oxide-Semiconductor Field-Effect Transistor)of the Boost converter gets switched when BLDC(Brushless Direct Current Motor)motor drive system requires power.Voltage Source three phase inverter and Boost converter is controlled by proportional-integral(PI)controller.Based on the BLDC drive,the load utilized from the solar generating module.Experimental results analyzed every module of the proposed grid system,which are solar generation utilizes the irradiance and temperature depends on this the Photovoltaics(PV)power is generated and the QPSO with Duty cycle switching state is determined.The Boost converter module is boost stage based on generation and load is obtained.Single Ended Primary Inductor Converter(SEPIC)and Zeta converter model is compared with the proposed logic;the proposed boost converter achieves the results.Three phase inverter control,PI,and BLDC motor drive results.Thus the proposed grid model is constructed to obtain the better performance results than most recent literatures.Overall design model is done by using MATLAB/Simulink 2020a.展开更多
Single Phase Induction Motor(SPIM)is widely used in industries at starting stage to provide high starting torque.The objective of the work is to develop a drive for Single Phase Induction Motor that does not use a sta...Single Phase Induction Motor(SPIM)is widely used in industries at starting stage to provide high starting torque.The objective of the work is to develop a drive for Single Phase Induction Motor that does not use a start or run capacitor.In this work,the researchers present the details about Maximum Power Point Tracking using series-compensated Buck Boost Converter,resonant Direct Current(DC)to Alternate Current(AC)inverter and matrix converter-based drive.The proposed method provides a variable starting torque feature that can be adjusted depending upon machine load to ensure Power Quality(PQ).The system uses Series Compensated Buck Boost Converter(SCBBC)to derive the power from solar source and a Partial Resonant Inverter(PRI)between the Matrix Converter(MC)and DC link battery to reduce the switching loss.The application of Space Vector Pulse Width Modulation(SVPWM)ensures the improvement of power quality at driving terminals of SPIM.The proposed system has been math-ematically modelled and simulated in MATLAB SIMULINK environment and was validated using standardized experimental verification.展开更多
将Z源网络级联,并采用交替反相电压偏移(alternativephase opposition disposition,APOD)的方法对逆变器进行控制。在matlab/sinmulink下,建立Z源级联三电平逆变器的APOD调制模型,仿真结果显示新型拓扑升压因子有明显提高。为进一步验...将Z源网络级联,并采用交替反相电压偏移(alternativephase opposition disposition,APOD)的方法对逆变器进行控制。在matlab/sinmulink下,建立Z源级联三电平逆变器的APOD调制模型,仿真结果显示新型拓扑升压因子有明显提高。为进一步验证新拓扑的有效性,进行了Z源级联逆变器的试验研究,试验结果证实新拓扑能够提高升压因子,扩大Z源逆变器的电压调节范围。展开更多
基金supported by the Shanghai Education Committee Scientific Research Subsidization (Grant No.05AZ30)the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20060280018)
文摘In this paper, a vector regulating principle of the phase and amplitude control PAC method for three-phase grid-connected inverters is presented.To solve the problem of heavy inrush current and slow dynamic response when system starts up, the starting voltage prediction control and the current feed-forward control are proposed and used, which improve the dynamic performance of the system in the PAC.The experimental results carried out on a three-phase grid-connected inverter proved the validity of the proposed method.
文摘This paper presents a new inverter based on three-phase Boost/Buck-boost single-stage inverter. The basic configuration of the new topology and their fundamental principle are firstly introduced, the method of design double-loop controller and sliding mode controller are clarified, analyzed and compared in the following. Finally the validity and feasibility of the new topology are tested by simulation. The results indicate that regulation of the voltage transfer ratio and output frequency can be realized optionally by the new converter, furthermore the harmonic distortion of waveform is low. So the inherent drawback of low voltage transfer ratio of traditional converter is effectively settled. This study may provide inspiration for further engineering application.
文摘提出一种新颖的三相Boost型光伏并网逆变器,并对其拓扑、双环改进型分区SPWM控制策略、低频模态、储能开关关断电压尖峰抑制、高频开关过程、光伏电池最大功率点跟踪(maximum power point tracking,MPPT)、关键电路参数设计准则等进行了深入的分析研究,获得了重要结论。其拓扑是由输入滤波电容、中心抽头储能电感、三相逆变桥、三相输出滤波器级联构成,且在储能电感中心抽头与输入源负端间接有储能开关;其控制策略是对三相电网电压进行60°分区,以确保每个开关周期均满足Boost型变换器的工作机理。设计并研制了3kW 96VDC/380V 50Hz 3φAC逆变器,实验结果表明,这类逆变器具有升压比大、功率密度高、变换效率高、储能电感和输出滤波器小、并网电流质量高等优良性能,在单级三相低压并网逆变场合具有重要应用前景。
文摘The Brushless DC Motor drive systems are used widely with renewable energy resources.The power converter controlling technique increases the performance by novel techniques and algorithms.Conventional approaches are mostly focused on buck converter,Fuzzy logic control with various switching activity.In this proposed research work,the QPSO(Quantum Particle Swarm Optimization algorithm)is used on the switching state of converter from the generation unit of solar module.Through the duty cycle pulse from optimization function,the MOSFET(Metal-Oxide-Semiconductor Field-Effect Transistor)of the Boost converter gets switched when BLDC(Brushless Direct Current Motor)motor drive system requires power.Voltage Source three phase inverter and Boost converter is controlled by proportional-integral(PI)controller.Based on the BLDC drive,the load utilized from the solar generating module.Experimental results analyzed every module of the proposed grid system,which are solar generation utilizes the irradiance and temperature depends on this the Photovoltaics(PV)power is generated and the QPSO with Duty cycle switching state is determined.The Boost converter module is boost stage based on generation and load is obtained.Single Ended Primary Inductor Converter(SEPIC)and Zeta converter model is compared with the proposed logic;the proposed boost converter achieves the results.Three phase inverter control,PI,and BLDC motor drive results.Thus the proposed grid model is constructed to obtain the better performance results than most recent literatures.Overall design model is done by using MATLAB/Simulink 2020a.
文摘Single Phase Induction Motor(SPIM)is widely used in industries at starting stage to provide high starting torque.The objective of the work is to develop a drive for Single Phase Induction Motor that does not use a start or run capacitor.In this work,the researchers present the details about Maximum Power Point Tracking using series-compensated Buck Boost Converter,resonant Direct Current(DC)to Alternate Current(AC)inverter and matrix converter-based drive.The proposed method provides a variable starting torque feature that can be adjusted depending upon machine load to ensure Power Quality(PQ).The system uses Series Compensated Buck Boost Converter(SCBBC)to derive the power from solar source and a Partial Resonant Inverter(PRI)between the Matrix Converter(MC)and DC link battery to reduce the switching loss.The application of Space Vector Pulse Width Modulation(SVPWM)ensures the improvement of power quality at driving terminals of SPIM.The proposed system has been math-ematically modelled and simulated in MATLAB SIMULINK environment and was validated using standardized experimental verification.
文摘将Z源网络级联,并采用交替反相电压偏移(alternativephase opposition disposition,APOD)的方法对逆变器进行控制。在matlab/sinmulink下,建立Z源级联三电平逆变器的APOD调制模型,仿真结果显示新型拓扑升压因子有明显提高。为进一步验证新拓扑的有效性,进行了Z源级联逆变器的试验研究,试验结果证实新拓扑能够提高升压因子,扩大Z源逆变器的电压调节范围。
