随着灵活交流输电系统(flexible AC transmission system,FACTS)(即电力电子)设备的开发以及在高压及超高压输电系统的应用,电力电子元件和其他高新技术材料成本的下降以及近年来对智能电网的开发,已研发出大量如电力电子智能变压器、...随着灵活交流输电系统(flexible AC transmission system,FACTS)(即电力电子)设备的开发以及在高压及超高压输电系统的应用,电力电子元件和其他高新技术材料成本的下降以及近年来对智能电网的开发,已研发出大量如电力电子智能变压器、故障电流限制器、带储能功能的静态同步补偿器、动态电压恢复器及有源电力滤波器等智能配网设备。部分设备如静态同步补偿器、动态电压恢复器和有源电力滤波器已应用于配网系统,部分设备如电力电子智能变压器和故障电流限制器正处于研发的后期和试运行阶段。智能配网设备的广泛应用将为配电系统自动化和智能化的实现、建设和快速发展做出巨大贡献。该文将主要探讨电力电子智能变压器的基本原理、最新的研发、应用及展望。展开更多
A new family of converters,high-performance AC/DC power factor correction(PFC) switching converters with one-cycle control technology and active floating-charge technology,was derived and experimentally verified.The t...A new family of converters,high-performance AC/DC power factor correction(PFC) switching converters with one-cycle control technology and active floating-charge technology,was derived and experimentally verified.The topology of a single-phase CCM and DCM Boost-PFC switching converter was also analyzed.Its operating prniciples and control methods were expounded.Based on these,a new type of AC/DC switching converter circuits for PFC combined with one-cycle control technology was presented herein.The proposed AC/DC switching converter significantly helps improve the converter efficiency and its power factor value.展开更多
Many wave energy conversion devices have not been well received. The main reasons are that they are too complicated and not economical. However, in the last two decades direct conversion systems have drawn the attenti...Many wave energy conversion devices have not been well received. The main reasons are that they are too complicated and not economical. However, in the last two decades direct conversion systems have drawn the attention of researchers to their widely distributed energy source due to their simple structure and low cost. The most well-known direct conversion systems presently in use include the Archimedes Wave Swing (AWS) and Power Buoy (PB). In this paper, these two systems were simulated in the same conditions and their behaviors were studied in different wave conditions. In order to verify the simulations, results of the generator of the finite element computations were followed. An attempt was made to determine the merits and drawbacks of each method under different wave conditions by comparing the performance of the two systems. The wave conditions suitable for each system were specified.展开更多
文摘随着灵活交流输电系统(flexible AC transmission system,FACTS)(即电力电子)设备的开发以及在高压及超高压输电系统的应用,电力电子元件和其他高新技术材料成本的下降以及近年来对智能电网的开发,已研发出大量如电力电子智能变压器、故障电流限制器、带储能功能的静态同步补偿器、动态电压恢复器及有源电力滤波器等智能配网设备。部分设备如静态同步补偿器、动态电压恢复器和有源电力滤波器已应用于配网系统,部分设备如电力电子智能变压器和故障电流限制器正处于研发的后期和试运行阶段。智能配网设备的广泛应用将为配电系统自动化和智能化的实现、建设和快速发展做出巨大贡献。该文将主要探讨电力电子智能变压器的基本原理、最新的研发、应用及展望。
文摘A new family of converters,high-performance AC/DC power factor correction(PFC) switching converters with one-cycle control technology and active floating-charge technology,was derived and experimentally verified.The topology of a single-phase CCM and DCM Boost-PFC switching converter was also analyzed.Its operating prniciples and control methods were expounded.Based on these,a new type of AC/DC switching converter circuits for PFC combined with one-cycle control technology was presented herein.The proposed AC/DC switching converter significantly helps improve the converter efficiency and its power factor value.
文摘Many wave energy conversion devices have not been well received. The main reasons are that they are too complicated and not economical. However, in the last two decades direct conversion systems have drawn the attention of researchers to their widely distributed energy source due to their simple structure and low cost. The most well-known direct conversion systems presently in use include the Archimedes Wave Swing (AWS) and Power Buoy (PB). In this paper, these two systems were simulated in the same conditions and their behaviors were studied in different wave conditions. In order to verify the simulations, results of the generator of the finite element computations were followed. An attempt was made to determine the merits and drawbacks of each method under different wave conditions by comparing the performance of the two systems. The wave conditions suitable for each system were specified.
