分析了目前多端口直流(DC, direct current)转DC(DC/DC)能源路由器的特点和缺陷,优化设计了一种面向能源互联网的多端口DC/DC能源路由器。通过对不同工况下运行电压的需求分析,对多端口DC/DC能源路由器进行了子模块全桥比例设计,在此基...分析了目前多端口直流(DC, direct current)转DC(DC/DC)能源路由器的特点和缺陷,优化设计了一种面向能源互联网的多端口DC/DC能源路由器。通过对不同工况下运行电压的需求分析,对多端口DC/DC能源路由器进行了子模块全桥比例设计,在此基础上提出了一种实现无闭锁穿越直流故障的交直流(AC/DC, alternating current/DC)解耦的控制策略。该多端口DC/DC能源路由器用于实现多个电压等级不同的直流电网的相互连接,既保留了传统直流自耦变压器技术低成本、低损耗的优势,又有效改善了其无法应对直流故障的缺点。最后,在MATLAB/Simulink环境进行了仿真测试,验证了该技术正常运行时的稳定性、抑制直流故障的可行性和控制策略的有效性。展开更多
An overview of recent advances in digital control of low-to medium-power DC/DC switching converters is presented.Traditionally,analog electronics methods have dominated in controlling such DC/DC converters.However,wit...An overview of recent advances in digital control of low-to medium-power DC/DC switching converters is presented.Traditionally,analog electronics methods have dominated in controlling such DC/DC converters.However,with the steadily decreasing cost of ICs,the feasibility of digitally controlled DC/DC switching converters has increased sig-nificantly.This paper outlines a sample of digital solutions for DC/DC switching converters to enhance the performance of DC/DC switching converters.Furthermore,latest research activities pertaining to applications for steady-state and dy-namic performance improvement,such as efficiency optimization,controller auto tuning,and capacitor charge balance control,is discussed.These applications demonstrate the significant advantages and potentials of digital control.展开更多
This paper proposed a novel type of DC-DC converter, termed as un-interrupted DC Autotransformer(un-interrupted DC AUTO), which has the capability to ride through DC fault on either side of the converter without block...This paper proposed a novel type of DC-DC converter, termed as un-interrupted DC Autotransformer(un-interrupted DC AUTO), which has the capability to ride through DC fault on either side of the converter without blocking any devices. Besides that, the adequately designed converter retains the advantages of DC AUTO technology, namely reduced investment cost and transmission loss. To begin with, the topology and basic attributes of the un-interrupted DC AUTO are illustrated. Then the design goals and the corresponding design procedures are analyzed. Furthermore, an effective control system is proposed to enable the converter steady operation during both normal and faulted conditions. Finally, a 1000 MW ±320 kV/±640 kV test system is built on PSCAD/EMTDC platform to verify the technical feasibility of the proposed converter and the effectiveness of the control strategy.展开更多
文摘分析了目前多端口直流(DC, direct current)转DC(DC/DC)能源路由器的特点和缺陷,优化设计了一种面向能源互联网的多端口DC/DC能源路由器。通过对不同工况下运行电压的需求分析,对多端口DC/DC能源路由器进行了子模块全桥比例设计,在此基础上提出了一种实现无闭锁穿越直流故障的交直流(AC/DC, alternating current/DC)解耦的控制策略。该多端口DC/DC能源路由器用于实现多个电压等级不同的直流电网的相互连接,既保留了传统直流自耦变压器技术低成本、低损耗的优势,又有效改善了其无法应对直流故障的缺点。最后,在MATLAB/Simulink环境进行了仿真测试,验证了该技术正常运行时的稳定性、抑制直流故障的可行性和控制策略的有效性。
文摘An overview of recent advances in digital control of low-to medium-power DC/DC switching converters is presented.Traditionally,analog electronics methods have dominated in controlling such DC/DC converters.However,with the steadily decreasing cost of ICs,the feasibility of digitally controlled DC/DC switching converters has increased sig-nificantly.This paper outlines a sample of digital solutions for DC/DC switching converters to enhance the performance of DC/DC switching converters.Furthermore,latest research activities pertaining to applications for steady-state and dy-namic performance improvement,such as efficiency optimization,controller auto tuning,and capacitor charge balance control,is discussed.These applications demonstrate the significant advantages and potentials of digital control.
基金supported by the State Grid Corporation of China Science and Technology Project(Grant No.NYN17201600314)the Initiative Postdocs Supporting Program(Grant No.BX201700088)
文摘This paper proposed a novel type of DC-DC converter, termed as un-interrupted DC Autotransformer(un-interrupted DC AUTO), which has the capability to ride through DC fault on either side of the converter without blocking any devices. Besides that, the adequately designed converter retains the advantages of DC AUTO technology, namely reduced investment cost and transmission loss. To begin with, the topology and basic attributes of the un-interrupted DC AUTO are illustrated. Then the design goals and the corresponding design procedures are analyzed. Furthermore, an effective control system is proposed to enable the converter steady operation during both normal and faulted conditions. Finally, a 1000 MW ±320 kV/±640 kV test system is built on PSCAD/EMTDC platform to verify the technical feasibility of the proposed converter and the effectiveness of the control strategy.
