To solve the input current harmonic pollution of the high power rectifier system,18-pulse rectifier based on a kind of active harmonic suppression technique at dc side is proposed in this paper.The pulse rectifier emp...To solve the input current harmonic pollution of the high power rectifier system,18-pulse rectifier based on a kind of active harmonic suppression technique at dc side is proposed in this paper.The pulse rectifier employs three-phase diode bridges,each of them followed by a boost converter.Unlike the conventional three-phase unity-power-factor diode rectifier,the ideal sinusoidal main currents of circuit topology are obtained by control its output current or input currents of three boost converters for approximately triangular modulation.The theoretical of modulation strategy and characteristics of input and output currents about the proposed rectifier are analyzed in detail.Simulation results by Matlab/Simulink demonstrate that the proposed rectifier draws nearly sinusoidal current and power quality index is improved.The correctness of the theoretical analysis is validated.展开更多
Based on the study of the harmonic suppression on DC side of the multi-pulse rectification system,a software platform is established in Matlab environment.The phase-shift angle is studied from the aspects of system st...Based on the study of the harmonic suppression on DC side of the multi-pulse rectification system,a software platform is established in Matlab environment.The phase-shift angle is studied from the aspects of system stability and economy,analyzing the effects of phase-shift angle on the input-side line current,the output-side voltage ripple,the equivalent capacity of autotransformer and other auxiliary devices in 12-pulse rectifier system.The software platform can complete the analysis only by inputting the initial conditions,eliminating the derivation of the intermediate formula and reducing the complexity of the system analysis,and have good scalability.The simulation results show that the system can effectively analyze the influence of phase angle on 12-pulse star-connected transformer.展开更多
以多重化整流电路原理和12脉波整流器原理,构建12脉波整流控制系统,以simulink为模型,利用RealTime Workplace和x PC Target实现12脉波整流控制部分的快速原型化的半实物仿真,然后再利用RTDS(Real Time Digital Simulator)实现主电路的...以多重化整流电路原理和12脉波整流器原理,构建12脉波整流控制系统,以simulink为模型,利用RealTime Workplace和x PC Target实现12脉波整流控制部分的快速原型化的半实物仿真,然后再利用RTDS(Real Time Digital Simulator)实现主电路的实时仿真,最后通过I/O实现整个系统的建立。通过实验验证了该控制系统的有效性并介绍了利用x PC和RTDS构建整个系统的过程。展开更多
基金Natural Science Foundation of Gansu Province Education Department(No.2017A-020)National Natural Science Foundation of China(No.51767013)Science and Technology Research and Development Plan of China Railway Corporation(No.2017J012-A)
文摘To solve the input current harmonic pollution of the high power rectifier system,18-pulse rectifier based on a kind of active harmonic suppression technique at dc side is proposed in this paper.The pulse rectifier employs three-phase diode bridges,each of them followed by a boost converter.Unlike the conventional three-phase unity-power-factor diode rectifier,the ideal sinusoidal main currents of circuit topology are obtained by control its output current or input currents of three boost converters for approximately triangular modulation.The theoretical of modulation strategy and characteristics of input and output currents about the proposed rectifier are analyzed in detail.Simulation results by Matlab/Simulink demonstrate that the proposed rectifier draws nearly sinusoidal current and power quality index is improved.The correctness of the theoretical analysis is validated.
基金National Natural Science Foundation of China(Nos.51367010,51867012)Lanzhou City Talent Innovation and Entrepreneurship Science and Technology Program Subsidy(No.2017-RC-51)。
文摘Based on the study of the harmonic suppression on DC side of the multi-pulse rectification system,a software platform is established in Matlab environment.The phase-shift angle is studied from the aspects of system stability and economy,analyzing the effects of phase-shift angle on the input-side line current,the output-side voltage ripple,the equivalent capacity of autotransformer and other auxiliary devices in 12-pulse rectifier system.The software platform can complete the analysis only by inputting the initial conditions,eliminating the derivation of the intermediate formula and reducing the complexity of the system analysis,and have good scalability.The simulation results show that the system can effectively analyze the influence of phase angle on 12-pulse star-connected transformer.
文摘以多重化整流电路原理和12脉波整流器原理,构建12脉波整流控制系统,以simulink为模型,利用RealTime Workplace和x PC Target实现12脉波整流控制部分的快速原型化的半实物仿真,然后再利用RTDS(Real Time Digital Simulator)实现主电路的实时仿真,最后通过I/O实现整个系统的建立。通过实验验证了该控制系统的有效性并介绍了利用x PC和RTDS构建整个系统的过程。
