Interline dc power flow controller with fault current‐limiting capability

Li, Guoqing; Bian, Jing; Wang, He; Wang, Zhenhao; Xin, Yechun; Guan, Jiaxin

doi:10.1049/iet-gtd.2019.0345

Cited by 13 publications

(4 citation statements)

References 23 publications

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“…Based on the layout and the parameter of the Zhangbei ±10 kV flexible DC distribution project in China [20, 21], a four‐terminal DC distribution system as shown in Fig. 1 is built as the research object.…”

Section: Analysis Of Flexible DC Distribution Systemmentioning

confidence: 99%

Protection schemes and settings of DC distribution systems

Jia

Chen

Zhao

et al. 2020

IET gener. transm. distrib.

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Flexible DC distribution system has become the research and development trend of the future distribution network with its unique advantages such as high efficiency and flexibility. However, the DC fault identification and protection is challenging due to the fact that the short-circuit current provided by converters is limited and last for a very short period, how to identify and isolate faults reliably using limited fault transient information becomes a serious problem faced by system protection. Based on the analysis of the fault characteristics of three typical faults in the DC distribution system, the setting principle and the calculation methods are proposed, and the reasonable range of protection setting boundaries is derived. According to the requirements of protections, the parameters of the actual DC distribution system are used for setting calculations, and a complete set of DC line protection schemes is designed in this study. Finally, the performance of the proposed protection scheme is verified in PSCAD/EMTDC simulation platform, the built simulation model has been successfully applied to the analysis and calculation in the commissioning of the DC distribution system.

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Section: Analysis Of Flexible DC Distribution Systemmentioning

confidence: 99%

Protection schemes and settings of DC distribution systems

Jia

Chen

Zhao

et al. 2020

IET gener. transm. distrib.

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show abstract

“…Literature [30] proposes a PFC with current limiting function, it achieves current limiting through the reverse voltage provided by the capacitor in the PFC. The current-limiting PFC in [31] limits the current through the inductor in the bridge arm of the controller. Note that there are few studies on integrating of PFC, FCL, and DCCB into one equipment.…”

Section: Introductionmentioning

confidence: 99%

A current‐limiting DC circuit breaker with power flow control capability

Xue

Xiao

Liu

et al. 2022

IET Generation Trans & Dist

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Power flow controller (PFC), fault current limiter (FCL) and DC circuit breaker (DCCB) are important equipment in the DC grid. There are a large number of power electronic components in these equipment, resulting in high cost. In order to reduce the use of additional components, a current‐limiting DC circuit breaker with power flow control capability is proposed here, which integrates the PFC, FCL, and DCCB into one equipment. Further, the main breaker in the proposed circuit breaker is shared by all lines connected to a DC bus to reduce cost. The topology and operating principle of the circuit breaker are introduced. Theoretical analysis and parameter design are carried out. Besides, the proposed circuit breaker is verified in PSCAD/EMTDC. Finally, the performance and cost are compared with existing schemes. The simulation results show that the proposed circuit breaker can effectively realize power flow control, current limiting and fault isolation at a lower cost.

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“…The inserted DC voltages can be simply realized by adjusting the output voltages of the SM strings. Thanks to its modular structure, this ringlike I-CFC presents good scalability in terms of voltage and power ratings, making itself a promising solution for large-capacity long-distance HVDC grids [27]. Its topology design optimization and dynamic control are further investigated in [28] and [29], respectively.…”

Section: Introductionmentioning

confidence: 99%