Control Strategies and Interactions of UHVAC and UHVDC Transmission Systems in North China-Central China-East China Power Grid

doi:10.11930/j.issn.1004-9649.2014.7.51.5

Abstract

Abstract: Study on the interplay between UHVAC and UHVDC systems and providing reasonable control strategies are of great significance for the security and stability of the interconnected grid of the North China-Central China-East China Power Grid. Therefore, impacts of AC system faults on DC system, and that of DC blocking faults on the whole system were simulated based on software FASTEST that is a kind of software for analyzing security and stability of power system quantitatively, by which a strategy of emergency DC power support was proposed when DC double-pole blocking occurs, which may lead the instability of the grid. The simulation results show that the AC line faults nearby the inverter side have the greatest impact on the DC system, moreover, the larger the short-circuit current of a fault point within the same province is, the more harmful to UHV tie line power will be. Also it is shown that this proposed control strategy is applicable and effective.

Key words: AC/DC, DC blocking, critical generators, DC power support

CLC Number:

TM712

QI Yi-tao, PENG Hui-min, YANG Ying, ZHOU Hai-feng, PAN Xue-ping. Control Strategies and Interactions of UHVAC and UHVDC Transmission Systems in North China-Central China-East China Power Grid[J]. Electric Power, 2014, 47(7): 51-56.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.7.51.5

https://www.electricpower.com.cn/EN/Y2014/V47/I7/51

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