The Voltage Clamping Based DC Circuit Breaker With Decoupled Fault Isolation and Energy Dissipation Processes

Xu, Jianzhongo; Wu, Dandan; Li, Jialong; Zhao, Xibei; Jia, Xin

doi:10.1109/tpwrd.2020.2977055

Cited by 7 publications

(4 citation statements)

References 21 publications

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“…By substituting u c (t 2 ) = 0 into (4), we can obtain the starting time t 2 of the capacitor commutation and line current i dc (t 2 ) = I 1 at that time. Therefore, the initial condition for ( 11) is given by (14). By substituting ( 14) and the condition that the capacitive current i c (t 3 ) = 0 into (11) at time t 3 , we obtain…”

Section: Theoretical Analysis Of Current-limiting Processmentioning

confidence: 99%

“…Typically, a DC circuit breaker (DCCB) is used to cut off the faulty line [11]. However, owing to problems with arc extinguishing and insulation technology [12], the increase in maintenance costs caused by the duplication of the interrupting current [13], and increasing metal oxide arrester energy consumption [14,15], it becomes too expensive to solely rely on DCCB to isolate the faulty line of the power grid. Reference [16] proposed a hybrid circuit breaker without load current switching that can reduce the conduction loss during normal operation; however, the rate of fault current rise is significantly fast.…”

Section: Introductionmentioning

confidence: 99%

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Fault Ride-Through Method for Interline Power Flow Controller Based on DC Current Limiter

Li,

Shi,

et al. 2024

Electronics

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The interline power flow controller (IPFC) based on a modular multilevel converter with a half-bridge configuration can control the active and reactive power flows of multiple alternating current (AC) lines. However, it forms a multiterminal system on the direct current (DC) side, which leads to DC faults. To reduce the protection and clearance requirements on the DC side of IPFCs, this paper proposes a hybrid current limiter topology suitable for generating a DC-side fault ride-through scheme. The current limiter employs a low-loss branch in steady-state conditions; when the fault occurs, a commutation capacitor and controllable power electronic devices are used to transfer the fault current to the current-limiting branch. To clarify the operating principles of the current limiter, the working states of each stage and electrical stress of each device are analyzed. Different components with varying limiter parameters are also discussed, and optimal parameters to achieve the best limitation effect are discussed. PSCAD simulations show that the proposed limiter can limit the overcurrent effectively, and DC-side fault clearance can be achieved easily with this fault ride-through strategy.

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Section: Theoretical Analysis Of Current-limiting Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fault Ride-Through Method for Interline Power Flow Controller Based on DC Current Limiter

Li,

Shi,

et al. 2024

Electronics

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“…The current limiting controls will be out of service after the fault is isolated. Under the standard 200-300 ms arc deionization process [34], the DCCBs reclose and the power transmission recovers.…”

Section: B Coordination Between Joint Current Limiting Controls and D...mentioning

confidence: 99%

Joint Limiting Control Strategy Based on Virtual Impedance Shaping for Suppressing DC Fault Current and Arm Current in MMC-HVDC Systems

Jiang,

Tao,

et al. 2023

Journal of Modern Power Systems and Clean Energy

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This paper proposes a joint limiting control strategy for suppressing DC fault current and arm current in modular multilevel converter-based high-voltage direct current (MMC-HVDC) systems, which includes two target-oriented current limiting controls. To limit the DC fault current in the early fault stage, an equivalent modular multilevel converter (MMC) impedance is obtained, and its high-frequency part is reshaped by introducing virtual impedance, which is realized by adjusting the inserted submodules adaptively. Following the analysis of MMC control characteristics, the arm current limiting strategy is investigated, with results showing that the inner-loop control has significant effects on arm current and that a simple low-pass filter can reduce the arm current in the fault period. Finally, by combining the virtual impedance shaping and innerloop control, the fault currents of DC lines and MMC arms can be suppressed simultaneously, which can not only alleviate the interrupting pressure of the DC circuit breaker, but also prevent the MMC from being blocked by the arm overcurrent. Theoretical analysis conclusions and the proposed strategy are verified offline by a digital time-domain simulation on Power Systems Computer Aided Design/Electromagnetic Transients including DC platform, and experiment on a real-time digital simulator platform.

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“…Reference [7] designed a low-cost voltage clamping based DCCB, but it can only interrupt the current in one direction. Reference [8] proposed a DCCB with H-bridge circuit composed of diode groups to achieve the ability of bi-directional current breaking.…”

Section: Introductionmentioning

confidence: 99%

A Current-Commutation DC Circuit Breaker with Adaptive Reclosing Capability

Jiang

Zhao

2021

E3S Web Conf.

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DC faults are critical events in a flexible high-voltage dc (HVDC) grid. Thus, ensuring that the power system returns to normal operation rapidly and reliably after fault isolation is very important. This requires a HVDC breaker. In overhead line systems under temporary faults, reclosing is often required. However, once the dc circuit breaker (DCCB) is reclosed directly, the large second overcurrent may occur which could damage the power electronic devices. To avoid this problem, a current-commutation DC circuit breaker with adaptive reclosing capability is proposed. Compared with the traditional auto-reclosing strategy, the second damage under permanent fault condition can be avoided by the proposed DCCB, which can identify the fault property. Compared with the hybrid DCCB, the power electronic breaking branch composed of lots of IGBTs is replaced by the current-commutation branch, which is employed to interrupt bi-directional dc fault current. Moreover, bypassing branch is configured to reduce the energy dissipation of arrester and shorten the fault isolation time effectively. Finally, simulation cases in PSCAD /EMTDC verify the effectiveness and superiorities of the proposed DCCB.

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The Voltage Clamping Based DC Circuit Breaker With Decoupled Fault Isolation and Energy Dissipation Processes

Cited by 7 publications

References 21 publications

Fault Ride-Through Method for Interline Power Flow Controller Based on DC Current Limiter

Fault Ride-Through Method for Interline Power Flow Controller Based on DC Current Limiter

Joint Limiting Control Strategy Based on Virtual Impedance Shaping for Suppressing DC Fault Current and Arm Current in MMC-HVDC Systems

A Current-Commutation DC Circuit Breaker with Adaptive Reclosing Capability

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