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A future role for cascade hydropower in the electricity system of China

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  • Tang, Xinhua
  • Zhou, Jianjun

Abstract

Due to the dominance of coal power, the electricity sector is the primary contributor of greenhouse gas emissions in China. The increase of peak-load and intermittent renewable power requires significant resources of regulation facilities. Comprehensively utilizing large-scale cascade hydropower plants (CHPPs), which are being rapidly developed in China, as renewable regulating facilities would be a strategic decision, considering the flexibility of hydropower. Jointly modeling a set of CHPP in the upstream Yangtze River indicated that the CHPP can regulate peak-load up to 30–40GW and intermittent renewables to scales of nearly 15GW from wind and solar sources with the help of ±800KV ultra-high voltage direct current (UHVDC) transmissions. The present study shows that the hydraulic stability of the concerned river reaches can be preserved easily and the comprehensive efficiency of regulation and transmission by CHPPs is much higher than that of pumped hydro energy storage (PHES) stations. As increasingly more giant CHPPs emerge in west China, using them primarily as regulating facilities can enhance the structure of power grids, promote the development of renewables, save energy and reduce emissions. Thus we propose to shift the CHPPs that were originally projected mainly for electricity to facility primarily for power improvement.

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  • Tang, Xinhua & Zhou, Jianjun, 2012. "A future role for cascade hydropower in the electricity system of China," Energy Policy, Elsevier, vol. 51(C), pages 358-363.
    • Handle: RePEc:eee:enepol:v:51:y:2012:i:c:p:358-363
    DOI: 10.1016/j.enpol.2012.08.025
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    1. Zhang, Jin & Xu, Linyu & Yu, Bing & Li, Xiaojin, 2014. "Environmentally feasible potential for hydropower development regarding environmental constraints," Energy Policy, Elsevier, vol. 73(C), pages 552-562.
    2. Ding, Ning & Duan, Jinhui & Xue, Song & Zeng, Ming & Shen, Jianfei, 2015. "Overall review of peaking power in China: Status quo, barriers and solutions," Renewable and Sustainable Energy Reviews, Elsevier, vol. 42(C), pages 503-516.
    3. Yuanming Wang & Kefeng Li & Ruifeng Liang & Shiqing Han & Yong Li, 2019. "Distribution and Release Characteristics of Phosphorus in a Reservoir in Southwest China," IJERPH, MDPI, vol. 16(3), pages 1-12, January.
    4. Zeng, Ming & Yang, Yongqi & Fan, Qiannan & Liu, Yingxin & Zou, Zhuojun, 2015. "Coordination between clean energy generation and thermal power generation under the policy of “direct power-purchase for large users” in China," Utilities Policy, Elsevier, vol. 33(C), pages 10-22.
    5. Wang, Yongpei & Yan, Weilong & Zhuang, Shangwen & Zhang, Qian, 2019. "Competition or complementarity ? The hydropower and thermal power nexus in China," Renewable Energy, Elsevier, vol. 138(C), pages 531-541.

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