Multiport Current Injection Hybrid DC Circuit Breaker With Simple Bridge Arm Circuit

Jin, Zhiwei; Zeng, Qingpeng; Guo, Xinming; Jia, Haipeng; Cui, Buli; Wei, Tongzhen

doi:10.1109/tie.2022.3224138

Cited by 6 publications

(1 citation statement)

References 25 publications

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“…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. Therefore, it is necessary to implement appropriate measures to limit the increase in the fault current before the DCCB operates.…”

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 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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