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Capacitor-commutated DCCBs are based on traditional DC circuit breakers [ 6 ], where the insulated gate bipolar transistors (IGBTs) of the transfer branch are replaced by series capacitors and diodes [ 7, 8 ].
A capacitor-commutated DC circuit breaker with fault character discrimination capability was presented in this paper. Taking a 320 kV double-terminal flexible DC system as background, the circuit breaker model was built by PSCAD for simulation verification. The following conclusions can be drawn:
The characteristic where the capacitor voltage in the capacitor circuit breaker needs to be released through the energy release branch is used in this paper. The capacitor in the circuit breaker is controlled to discharge to the fault line.
However, unlike AC systems, there is no zero-crossing for the current in DC systems, this makes the DC circuit breakers design more demanding. This paper presents the design of a solid-state DC circuit breaker (SSCB) in details using series and parallel configurations of IGBTs to increase the voltage and current ratings.
Flexible direct current (DC) grids face a serious challenge in terms of rapidly isolating DC faults. A DC circuit breaker is an effective solution for DC fault isolation.
Mainstream circuit breakers include mechanical type, solid-state type and hybrid type. The mechanical DCCB use the mechanical switch parallel with the transfer circuit to realize the DC breaking in the DC system. Solid-state DCCB uses the semiconductor switch to interrupt the current.
The design for the practical test case of 5 kV, 2 kA LC DC Circuit Breaker is presented and shows that the pre-charged capacitor voltage requirement is low, at 10% of the DC CB rating. Both, …
Recently, a new DC CB topology based on parallel capacitor Abstract— This article describes design, operation and experimental testing of a mechanical DC CB (Circuit Breaker) with …
A bi-directional current-limiting hybrid DC circuit breaker with fast-breaking capability. Author links open overlay panel Hongchun Shu a, Zongxue Shao a b. ... while the …
The development of flexible AC transmission and multi-terminal DC grid is in an urgent demand for DC circuit breaker (DCCB) technology with faster switching speed, strong …
Jovcic, D & Kovacevic, S 2022, '' Experimental Evaluation of 5 kV, 2 kA, DC Circuit Breaker with Parallel Capacitor '', IEEE Transactions on Power Delivery, vol. 37, no. 5, pp. 3510-3520 . …
This paper presents the design of a solid-state DC circuit breaker (SSCB) in details using series and parallel configurations of IGBTs to increase the voltage and current …
Abstract: This article describes design, operation and experimental testing of a mechanical DC CB (Circuit Breaker) with parallel capacitors. The topology resembles hybrid …
Using charged capacitor in parallel: This technique is used in DC circuit breaker. The DC does not have natural zero current. ... Comparison of AC Circuit Breaker & DC Circuit Breaker. As …
A novel hybrid DC circuit breaker based on thyristor is proposed. The circuit breaker uses a thyristor to change the operating state of the circuit, through the cooperation of …
This paper studies the inductive series-parallel (SP) topology as a wireless capacitor charger for DC circuit breakers (DCCBs) including active injection circuits (AICs). The design objectives …
A DC circuit breaker is an effective solution for DC fault isolation. To improve the fault-isolation and reclosing capability of flexible DC systems, a new high voltage direct current …
1.1 HVDC Circuit Breaker Applications and Early Developments. HVDC systems originally did not require the use of DC circuit breakers because short circuits within the DC …
The article proposes a mechanical DC circuit breaker (CB) based on a series LC circuit. It requires two switches (a fast disconnector and an AC circuit breaker), an inductor …
Therefore, the DC terminal must be connected in parallel with a larger capacity capacitor. In the event of a fault, the capacitor at the fault point will generate large di/dt and …
Abstract: This paper studies the inductive series-parallel (SP) topology as a wireless capacitor charger for DC circuit breakers (DCCBs) including active injection circuits (AICs). The design …
This article describes design, operation and experimental testing of a mechanical DC CB (Circuit Breaker) with parallel capacitors. The topology resembles hybrid …
The article proposes a mechanical DC circuit breaker (CB) based on a series LC circuit. It requires two switches (a fast disconnector and an AC circuit breaker), an inductor …
The measurements confirm that 4-break LC DC Circuit Breaker using 800 µF capacitor can commutate 930 A while contacts aDC current with around 4.2 kV recovery voltage. It is …
Nowadays, traditional DC circuit breakers (DCCBs) are always expensive and lack current-limiting capabilities. Hence, this paper proposes a current limiting and low-cost …
Recent research has demonstrated that the speed of operation of mechanical DC CB can be improved using parallel capacitor across the main switch [9]. This approach …
Abstract: This article describes design, operation and experimental testing of a mechanical DC CB (Circuit Breaker) with parallel capacitors. The topology resembles hybrid …
Recent research has demonstrated that the speed of operation of mechanical DC CB can be improved using parallel capacitor across the main switch [9]. This approach …
Jovcic, D & Kovacevic, S 2022, '' Experimental Evaluation of 5 kV, 2 kA, DC Circuit Breaker with Parallel Capacitor '', IEEE Transactions on Power Delivery, vol. 37, no. 5, pp. 3510-3520 . …
This article describes design, operation and experimental testing of a mechanical DC CB (Circuit Breaker) with parallel capacitors. The topology resembles hybrid …
Recently, a new DC CB topology based on parallel capacitor Abstract— This article describes design, operation and experimental testing of a mechanical DC CB (Circuit Breaker) with …