Capacitor commutation type DC circuit breaker with fault character discrimination capability. Journal of Power Electronics, 23, 6, (2023), 1016-1027. DOI: 10.1007/s43236-023-00590-7. Smart Search (in title, author, abstract, keywords)
Get PriceResearch efforts have been put to realizing DC fault isolation by coordinating resistive type superconducting fault current limiter (R-SFCL) and integrated …
Get PriceThe 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.
Get PriceThe topological principles of DC circuit breakers are complex and diverse. According to the different key on-off components in DC circuit breakers, DC circuit breakers can be divided into three types: mechanical DC circuit breakers, all solid state DC circuit breakers, and hybrid DC circuit breakers combining mechanical and solid-state switches.
Get PriceA typical hybrid DC circuit breaker topology is shown in Fig. 1, including main branch, commutation branch and energy dissipation branch this scheme, power electronic devices (e.g., IGBTs) are subjected to large voltage and current stresses during short-circuit current shutdown transients, resulting in increased device junction …
Get Price3.1.1 Mechanical DC circuit breaker. The mechanical DCCB consists of a circuit breaker (CB), a capacitor, an inductor, a …
Get PriceDC circuit breaker (DCCB) is one of the most important technologies for safe and reliable operation of dc grid. And the hybrid DCCB (HCB) is obviously promising in high-voltage application area, because it combines both the advantages of mechanical DCCB and solid-state DCCB. At present, insulated gate bipolar transistors (IGBTs) are generally used for …
Get PriceThis paper introduces a new proactive solid-state circuit breaker (P-SSCB) for direct current (dc) medium voltage applications. The P-SSCB aims to apply high-power rating thyristors while achieving a fast response speed and high efficiency. To manually turn off thyristors, a complimentary commutation technique is used; meanwhile, full-controlled …
Get PriceThe 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.
Get PriceA DC circuit breaker is an OCPD that protects electrical devices operating with DC and contains additional arc-extinguishing measures. DC circuit breakers are a relatively new technology to most homeowners since most devices used in a house work with AC and AC circuit breakers.
Get PriceKeywords: adaptive reclosing, dc circuit breaker, fault property identification, HVDC grid, thevenin equivalent circuits. Citation: Xu Z, Liang J, Guo Y and Wang Y (2022) A capacitor-based DC circuit breaker for HVDC power grid. Front. Energy Res. 10:1013696. doi: 10.3389/fenrg.2022.1013696. Received: 07 August 2022; Accepted: 25 August 2022;
Get PriceHVDC circuit breakers are the core equipment for the reliable operation of VSC-HVDC. The controllable resonant DC circuit breaker amplifies the oscillating current through excitation capacitor oscillation and boost, quickly generating a current zero point, and achieving the transmission of fault current and circuit breaking. In this paper, …
Get PriceA 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 …
Get PriceDC circuit breaker to manage the DC short-circuit fault is proposed and experimentally veried in ref. 23, where a ... and most capacitors in the existing circuit breaker structure
Get PriceRecent research papers suggest that ABB and ALSTOM have created DC circuit breaker prototypes using this approach, and they show potential as promising technologies. The H-DCCB topology …
Get PriceTo improve the fault-isolation and reclosing capability of flexible DC systems, a new high voltage direct current (HVDC) circuit breaker topology with adaptive …
Get Pricethe circuit breaker. In addition, exible DC transmission lines are mostly overhead lines, and the probability of instantaneous faults is high on overhead lines. Using a DC circuit breaker to identify the fault nature is an economic and promising solu - tion [11–15]. A pre-charged capacitor circuit breaker was proposed in [11].
Get PriceLow impedance in DC grid leads to sharp increase of fault current, which may do damage to power grid security, once short-circuit fault occurs. DC circuit breaker technology has been becoming one of the most essential factors contributing to DC power grid. Hybrid DC circuit breaker (DCCB) is prominent in DC grid due to its fast working speed and high reliability. …
Get PriceTo overcome limitations of the peak DC fault current with previous LC DC Circuit Breakers, this paper studies using a pre-charged capacitor in the auxiliary …
Get PriceA low voltage DC circuit breaker prototype has been built using a multistrand magnesium diboride (MgB2) coil, a vacuum interrupter, and an insulated-gate …
Get PriceThe mechanical LC DC Circuit breaker is another topology that similarly employs parallel capacitor but requires a new design for the main switch which is based on the overlapping contacts [10]. The LC DC CB hardware testing in [11] demonstrates 400 A solely arc-based commutation in 300-400 µs, on 1.3 kV test system.
Get PriceA 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 the pre-charged capacitor and the thyristor, charge and discharge of a capacitor forward or reverse.
Get PriceIn addition, flexible DC transmission lines are mostly overhead lines, and the probability of instantaneous faults is high on overhead lines. Using a DC circuit breaker to identify the fault nature is an economic and promising solution [11,12,13,14,15]. A pre-charged capacitor circuit breaker was proposed in . However, a reclosing strategy is ...
Get PriceGrading caps are found on breakers with more than one break, live tank/air blast breakers can have up to 10 breaks per phase (800kv) and have a grading capacitor for each breaks. The first picture shown above should have grading capacitors labeled where it shows PIR! not all breakers will have PIR, but all multi break breakers requires …
Get PriceIn order to solve the problems of high cost and poor current limiting effect in most conventional hybrid DC circuit breaker, this paper proposes an assembly DC circuit breaker based on pre-charged capacitors. It mainly includes converter-part and line-part, both of them consist of pre-charged capacitors. Converter-part is installed on DC outlet …
Get PriceSF 6 passive resonance DC circuit breaker combined with a superconducting fault current limiter. Bin Xiang, Corresponding Author. ... Active resonance DCCBs include a charging circuit to charge the pre-charged commutation capacitor and a control circuit to control the switches [4, 5]. It is hard to charge the …
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