Improved multiline HVDC circuit breakers with asymmetric conducting branches

Xiao, Huangqing; Huang, Xiaowei; Xu, Feng; Dai, Leisi; Zhang, Yongjun; Cai, Zexiang; Li, Fangxing

doi:10.1016/j.ijepes.2021.107882

Cited by 11 publications

(5 citation statements)

References 32 publications

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“…VSC-HVDC has been widely used in asynchronous grid interconnection, offshore wind farm, urban grid etc. [12][13][14][15][16]. VSC-HVDC has no commutation failure issue because of selfshut-off capability.…”

Section: Figurementioning

confidence: 99%

Frequency selection method for urban low frequency multi‐terminal interconnected systems

Zhang

2023

IET Generation Trans & Dist

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Large-scale urban power grid (LUPG) is normally under the operating mode by voltage layer and zone partition. One of the most important directions for the development of urban is to enhance the controllability by flexible low-frequency interconnection technology. In this study, a frequency selection method for urban low-frequency multi-terminal interconnected systems (ULFMIS) is proposed. Firstly, the required support power under different conditions, the index number of sending partition (SP) and receiving partition (RP) are determined. Secondly, by calculating the current distribution along the line under different support powers, the upper limit of the transmission frequency (ULTF) of each line is obtained. Finally, the smallest transmission frequency among the ULTFs of different tie lines is selected as the ULTF of the ULFMIS. The proposed method is validated in a typical four-terminal ULFMIS. The results demonstrate that the suggested method is suitable for calculating the ULTF taking account of the influence of the number of parallel lines on economic cost and provide guidance for future practical ULFMIS projects.

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Section: Figurementioning

confidence: 99%

Frequency selection method for urban low frequency multi‐terminal interconnected systems

Zhang

2023

IET Generation Trans & Dist

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“…Analysis for the sizing process for fault current limiters combined with DC-CB was done in 27 using PSCAD and MATLAB soft-wares. Superconducting fault limiters was combined with various types of HVDC CBs to analyze their impact on the resulting transient behavior in in 29 The benefits from the extended H-bridge design were utilized in 30 where bidirectional current flow through main circuit breaker could be achieved allowing a reliable performance of breaker as confirmed by simulation results using PSCAD 30 . A modified hybrid HVDC combining a capacitor commutated topology proved to be cost effective and reliable in 31 .…”

Section: Introductionmentioning

confidence: 99%

New multi-injection commutation topology for circuit breakers of HVDC transmission lines

Wadie,

Elsisi,

Eliyan

2024

Sci Rep

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Power-sharing between countries has an essential effect on increasing the power system’s reliability and allowing a resilient energy market. High voltage direct current (HVDC) transmission systems are preferable for long-distance transmission to decrease power losses. However, HVDC transmission lines have many protection challenges including the differentiability between various types of HVDC circuit breakers (HVDC-CB). Although mechanical HVDC-CBs suffered from long response time, they superseded their solid-state counterparts in terms of price and power losses. In this paper, a multi-injection commutation system MICS-HVDC-CB is developed to provide economic and fast response HVDC-CB. The proposed breaker doesn’t add external elements to avoid any price increase but instead modifies the existing topology. The MICS consists of multiple L–C commutation circuits inserted sequentially following the receiving of the tripping signal. The proposed MICS-HVDC-CB was tested upon a real transmission line using ATP simulation software. The results emphasize that the developed MICS-HVDC-CB decreased the arcing time to 38.5% and 20% compared to passive and active DC-CBs. The impact of cooling power, arcing time constant, and fault resistance was also investigated. The results showed the effectiveness of the proposed MICS topology in reducing the arcing time while keeping a simple and economic breaker structure.

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“…The rapid scale-up of new energy power generation and the reduction of the proportion of non-clean energy have improved the green and low-carbon levels of the energy industry (Zhu et al, 2022;Sun et al, 2021a). The intermittency, volatility, and uncertainty of renewable energy generation bring new problems to the safe and reliable operation of the power grid (Xiao et al, 2022). To address the challenge of high-efficiency utilization of new energy with high proportions and power replacement with high proportions under the background of carbon peak (Sun et al, 2021b), the demand for power systems for auxiliary power services such as peak and frequency regulation has increased significantly in recent years (Ma et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Switching control strategy for an energy storage system based on multi-level logic judgment

Sun¹,

Yi²,

Sun

et al. 2023

Front. Energy Res.

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Energy storage is a new, flexibly adjusting resource with prospects for broad application in power systems with high proportions of renewable energy integration. However, energy storage systems have spare capacity under stable working conditions and may be idle for some periods. These actions are primarily selected for peak shaving and valley filling, frequency regulation, and voltage regulation as the only control target; thus, energy storage cannot be used effectively, which weakens the effect of energy storage on grid support. To improve the utilization rate and economic benefits of the energy storage system and enhance the support performance of energy storage for the safe operation of the power grid, this article proposes a switching control strategy for an energy storage system based on multi-layer logic judgment to maximize energy storage benefits and ensure safe and stable power grid operation. First, this study analyzed the potential multi-ancillary service operation requirements of the energy storage system, combined with the auxiliary compensation benefits of the energy storage power station. Using this information, the study proposed a comprehensive index that considers the economy of the energy storage system and the stable operation of the power grid to support the evaluation needs of energy storage control. Based on this, the study then pre-set multi-layer judgment logic for the operation control of the energy storage system. A multi-objective judgment and smooth switching strategy for the coordinated operation of the energy storage system was proposed based on the typical operating conditions of the energy storage system participating in the grid peak shaving and valley filling, frequency regulation, and voltage regulation. This switching control method effectively utilized the idle capacity of the energy storage system and improved the energy storage system’s support effect on the power grid. Through the improved energy storage control model based on MATLAB/Simulink, this study also verified the effectiveness of the proposed smooth switching strategy of the energy storage system.

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Improved multiline HVDC circuit breakers with asymmetric conducting branches

Cited by 11 publications

References 32 publications

Frequency selection method for urban low frequency multi‐terminal interconnected systems

Frequency selection method for urban low frequency multi‐terminal interconnected systems

New multi-injection commutation topology for circuit breakers of HVDC transmission lines

Switching control strategy for an energy storage system based on multi-level logic judgment

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