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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 (HVDC) circuit breaker topology with adaptive reclosing capability is proposed in this paper.
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.
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:
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.
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 ].
It was found that the current-limiting inductance in the circuit breaker could effectively limit the fault current amplitude to 7.35 kA, which reduced the current stress of the circuit breaker. Finally, the breaking speed of the circuit breaker is comparable to other circuit breakers that do not have current-limiting capability.
With features of negligible operating losses and low construction cost, …
Design criterion of capacitor in mechanical DC-CB with auto-closing function for DC system Abstract: With features of negligible operating losses and low construction cost, …
To avoid the blocking of converters, this paper presents a novel protection scheme for VSC-HVDC system, which consists fault isolation and auto-reclosing of DC circuit breaker (DCCB). …
Installation of shunt capacitor banks on transmission lines for local voltage support raises concerns about performance capabilities of existing line breakers. Questions on reclosing …
Abstract—Lots of dc circuit breakers have been proposed for protecting medium voltage (MVDC)dc systems. However, they ... reclosing process, the polarity of capacitor in the …
To avoid the blocking of converters, this paper presents a novel protection scheme for VSC …
4 · Auto Reclosing: The primary goal of Auto reclosing is to enhance the reliability of the …
In the reclosing process, the polarity of capacitor in the counter current loop could restore automatically to the initial state, and the auxiliary thyristor could be turned off naturally.
In the field of fault isolation and clearance in flexible DC power grids, hybrid DC circuit breakers (HDCCB) have been widely used because of their advantages. However, their …
This publication presents a breakthrough step of the circuit breaker functionality combining the transient-free and restrike-free functionality with a new fast-reclosing function …
An auto-reclosing scheme for DC circuit breaker in VSC-HVDC transmission system eISSN 2051-3305 Received on 24th August 2018 Accepted on 19th September 2018 ... charging and …
Installation of shunt capacitor banks on transmission lines for local voltage support raises concerns about performance capabilities of existing line breakers. Questions on reclosing …
To improve the fault-isolation and reclosing capability of flexible DC systems, a new high voltage direct current (HVDC) circuit breaker topology with adaptive reclosing …
DC circuit breakers (DCCBs) are the critical equipment to isolate faults in high-voltage DC grids. The improvement of interruption performances of capacitor-based DCCBs …
4 · Auto Reclosing: The primary goal of Auto reclosing is to enhance the reliability of the power system and minimize power outage durations. This process involves a special reclosing …
a capacitor commutated DC circuit breaker (CCCB). A commutated capacitor is adopted in the main branch to reduce the cost. The topology and operating principle of CCCB are ... To …
of a circuit breaker when it interrupts a circuit. Figure 6 shows a conceptual network to explain the phenomenon of TRV across a circuit breaker (4). The inductor and capacitor represent the …
Four reclosers on the right side of a substation. In electric power distribution, automatic circuit reclosers (ACRs) are a class of switchgear designed for use on overhead electricity …
Vacuum circuit-breaker (VCB) is a circuit-breaker in which the contacts open and close within a highly evacuated envelope [source: IEC 62271-100-2021]. ... The circuit breakers use a motor-spring stored-energy closing mechanism of the …
Abstract: In order to solve the problems like DC fault line isolation or reclosing in DC grid, a capacitor-clamping DC circuit breaker with adaptive reclosing capability is proposed. The …
With features of negligible operating losses and low construction cost, mechanical direct current circuit breakers (DC-CBs) with auto-reclosing function have …
Design criterion of capacitor in mechanical DC-CB with auto-closing function …
Abstract: In order to solve the problems like DC fault line isolation or reclosing in DC grid, a …
Based on this, to prevent the circuit breaker reclosing in the event of a permanent fault from having an impact on the system, a method for fault identification based on Euclidean …
a new high voltage direct current (HVDC) circuit breaker topology with adaptive reclosing capability is proposed in this paper. The topology of the circuit breaker is a T-shaped structure, …
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. To …