2-Terminal hybrid HVDC cost effective alternatives for clearing temporary DC line faults

Andersson, Mats; Yang, Xiaobo; Yuan, Chunming

doi:10.1109/appeec.2017.8308908

Cited by 7 publications

(1 citation statement)

References 2 publications

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“…Thus, they generate some amount of conduction loss, whereas they are normally kept on-state and do not cause switching loss. Therefore, the calculated power loss is 0.02% [26] or 0.05% [27] of the transmission capacity, which is negligible comparing to the loss in the rectifiers and inverters. The DC bus is equipped with the braking chopper [29] to avoid overvoltage and also to balance the voltage between the positive pole and the negative C. Onshore AC system The onshore AC system is simplified as a voltage source in Fig.…”

Section: B DC Transmission Linesmentioning

confidence: 95%

Continuous Operation of Wind Power Plants Under Pole-to-Ground Fault in an HVDC System Consisting of Half-Bridge MMCs and Disconnecting Switches

Enomoto

Sano

Kanno

et al. 2023

IEEE Trans. Power Electron.

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This paper focuses on a multi-circuit HVDC system which can localize the DC line fault without DC circuit breakers. The conventional fault clearing method causes the shutdown and the restart of the wind power plants, which results in the suspension of the power supply. The suspension may affect the balance of supply and demand, and may cause frequency drop in the onshore AC power system. To solve the problem, this paper proposes a system switching method to enable the continuous operation of the wind power plants under the DC line fault. The proposed method utilizes the half-bridge modular multilevel converter (HB-MMC) to clear the fault while keeping the wind power plants operating. As a result, the proposed method realizes the continuous operation of wind power plants and shorten the transmission outage to 0.2 s. Thus, it greatly increases the supply reliability. Experimental results demonstrate the validity of the proposed method.

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Section: B DC Transmission Linesmentioning

confidence: 95%