Emergency DC Power Support in Parallel AC/DC Power System

Xiang-qiang, Liu; Xie, Hui; Wang, Zhaoshuo; Lv, Jinzhuang

doi:10.1007/978-3-319-01273-5_58

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“…The HVDC system has the advantages of fast power regulation and large power regulation capacity [7, 8]. When the AC grid is disturbed, the HVDC system can change the transmission power for rapid emergency DC power support (EDCPS) [9] and play a role in the controlling of frequency stability [10–12]. Therefore, how to make the reasonable use of EDCPS for frequency stability control is the key to improve the frequency stability of the AC/DC hybrid power system.…”

Section: Introductionmentioning

confidence: 99%

Frequency stability control method considering limited EDCPS

Wang

Chen

et al. 2019

J. eng.

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Section: Introductionmentioning

confidence: 99%

Frequency stability control method considering limited EDCPS

Wang

Chen

et al. 2019

J. eng.

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A Coordinated DC Power Support Strategy for Multi-Infeed HVDC Systems

et al. 2018

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A DC power support strategy utilizes the flexibility of a High-voltage direct-current (HVDC) system in power modulation to optimize the operating point or compensate the power imbalance caused by a disturbance. The major impediment to the strategy is the difficulty in maintaining DC voltage values at converter stations during the process of DC power support. To overcome the difficulty, a coordinated DC power support strategy for multi-infeed HVDC systems is proposed in this paper. Synchronous condensers are employed to provide dynamic reactive power compensation in sustaining DC voltage values at converter stations. Models are built for the optimal leading phase operation and adjusting excitation voltage reference value of synchronous condensers. Multiple HVDC links are coordinated to participate by using the DC power support factor to rank and select the links. Optimal DC power support values of the participating HVDC links are obtained with a comprehensive stability margin index that accounts for transient stability of the sending-end systems and frequency security of the receiving-end systems. An optimal load shedding model is used to ensure the frequency security of receiving-end systems. Case study results of a provincial power system in China demonstrate the effectiveness and performance of the proposed DC power support strategy.

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Emergency DC Power Support in Parallel AC/DC Power System

Cited by 2 publications

References 1 publication

Frequency stability control method considering limited EDCPS

Frequency stability control method considering limited EDCPS

A Coordinated DC Power Support Strategy for Multi-Infeed HVDC Systems

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