Impact of the DC circuit breaker design on selective fault detection and clearing methods in multi-terminal HVDC systems

Background: Fast and reliable fault detection methods are the main technical challenges faced by photovoltaic grid-connected systems through modular multilevel converters (MMC) during the development. Objective: Existing fault detection methods have many problems, such as the inability of non-linear elements to form accurate analytical expressions, the difficulty of setting protection thresholds and the long detection time. Method: Aiming at the problems above, this paper proposes a rapid fault detection method for photovoltaic grid-connected systems based on Recurrent Neural Network (RNN). Results: The phase-to-mode transformation is used to extract the fault feature quantity to get the RNN input data. The hidden layer unit of the RNN is trained through a large amount of simulation data, and the opening instruction is given to the DC circuit breaker. Conclusion: The simulation verification results show that the proposed fault detection method has the advantage of faster detection speed without difficulties in setting and complicated calculation.

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Malfunction Issue of SiC-SIT Based DC Circuit Breaker in 400V DC Power Distribution Systems for Data Centers

IEICE Transactions on Communications ◽

10.1587/transcom.e95.b.1990 ◽

2012 ◽

Vol E95.B (6) ◽

pp. 1990-1996

Author(s):

Seiya ABE ◽

Sihun YANG ◽

Masahito SHOYAMA ◽

Tamotsu NINOMIYA ◽

Akira MATSUMOTO ◽

...

Keyword(s):

Power Distribution ◽

Distribution Systems ◽

Data Centers ◽

Circuit Breaker ◽

Power Distribution Systems ◽

Dc Power ◽

Dc Circuit Breaker

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A Low-Loss Low-Cost DC Circuit Breaker for Power System Protection

IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society ◽

10.1109/iecon43393.2020.9254875 ◽

2020 ◽

Author(s):

Sheng Wang ◽

Wenlong Ming ◽

Carlos E. Ugalde-Loo

Keyword(s):

Power System ◽

Low Cost ◽

Circuit Breaker ◽

Power System Protection ◽

Low Loss ◽

System Protection ◽

Dc Circuit Breaker

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Combined Hybrid DC Circuit Breaker Capable of Controlling Current Flow

IEEE Transactions on Industrial Electronics ◽

10.1109/tie.2020.3034847 ◽

2020 ◽

pp. 1-1

Author(s):

Shuo Zhang ◽

Guibin Zou ◽

Xiuyan Wei ◽

Chengquan Zhang

Keyword(s):

Current Flow ◽

Circuit Breaker ◽

Dc Circuit Breaker

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Current Limiting Characterization by Winding Types in Superconducting DC Circuit Breaker

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2021.3061326 ◽

2021 ◽

Vol 31 (5) ◽

pp. 1-5

Author(s):

Sangyong Park ◽

Hyo-Sang Choi

Keyword(s):

Circuit Breaker ◽

Current Limiting ◽

Dc Circuit Breaker

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A Novel Forced Resonant Mechanical DC Circuit Breaker by Using Auxiliary Oscillation Switch for Zero-crossing

IEEE Transactions on Power Electronics ◽

10.1109/tpel.2021.3087786 ◽

2021 ◽

pp. 1-1

Author(s):

Lei Qi ◽

Xilin Chen ◽

Xinyuan Qu ◽

Liangtao Zhan ◽

Xiangyu Zhang ◽

...

Keyword(s):

Circuit Breaker ◽

Zero Crossing ◽

Dc Circuit Breaker

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Capacitor Commutation Method for MVDC Hybrid Circuit Breakers

Designs ◽

10.3390/designs5020028 ◽

2021 ◽

Vol 5 (2) ◽

pp. 28

Author(s):

Hyosung Kim

Keyword(s):

Short Circuit ◽

Circuit Breaker ◽

Reverse Current ◽

Resonant Circuit ◽

Power Circuit ◽

Power Sources ◽

Semiconductor Switch ◽

Current Commutation ◽

Dc Circuit Breaker ◽

Hybrid Circuit

The medium voltage DC (MVDC) type system can connect multiple terminals to a common MVDC bus, so it is possible to connect several renewable DC power sources to the common MVDC bus, but a DC circuit breaker is needed to isolate short circuit accidents that may occur in the MVDC bus. For this purpose, the concept of a hybrid DC circuit breaker that takes advantage of a low conduction loss contact type switch and an arcless-breaking semiconductor switch has been proposed. During break the hybrid switch, a dedicated current commutation device is required to temporarily bypass the load current flowing through the main switch into a semiconductor switch branch. Existing current commutation methods include a proactive method and a reverse current injection method by a LC (Inductor-capacitor) resonant circuit. This paper proposes a power circuit of a new MVDC hybrid circuit breaker using a low withstanding voltage capacitor branch for commutation and a sequence controller according to it, and verifies its operation through an experiment.

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