沙戈荒新能源基地外送能力限制因素综述及系统性评估展望OA
Overview of Limiting Factors and Prospects for Systematic Evaluation of the External Transmission Capacity of Renewable Energy Base in Desert,Gobi and Barren Areas
[目的]伴随着中国的新型电力系统建设,沙戈荒新能源基地逐步成为重要的电力供应来源.在考虑沙戈荒基地规划容量的基础上,其供应受端电网的电力还受到多种外部因素的影响,且各个环节责任主体不同.因此,对于由多基地、多通道、多受端组成的复杂沙戈荒新能源基地系统,其中任一基地的外送能力评估需要综合考虑多方面因素.[方法]分析了基地电源通过输电通道向受端电网供电的全过程,通过对其中各个领域已有成果的研究,详细阐述了影响基地外送功率的各类因素.[结果]基地外送可划分为3个环节,基地电源、输电通道和受端电网.在基地电源中,新能源波动、跟网型和构网型技术影响电源输出的有功功率;在输电环节中,常规直流输电技术或柔性直流输电技术的控制策略,及送受端电网强度影响通道最大传输能力;在受端电网中,单直流馈入、多直流技术组合方案,以及多直流耦合影响受端电网的受电能力.沙戈荒新能源基地外送能力评估需要综合考虑上述因素.[结论]所提系统性评估方法可推动各环节多主体协同合作,综合考虑基地容量规划和外送影响因素的约束,为最终实现对沙戈荒新能源基地复杂系统外送能力的准确评估提供技术思路和借鉴参考.
[Objective]With the construction of China's new power system,renewable energy bases in desert,gobi and barren areas are gradually becoming crucial power suppliers.Based on the planned capacity of these bases,the actual power delivered to receiving-end grids is influenced by various external factors,involving different stakeholders across multiple stages.Therefore,for the complex system comprising multi-base sources,multi-channel transmission,and multi-receiving ends,evaluating the transmission capacity of any single base requires a comprehensive consideration of multiple factors.[Methods]This study analyzes the entire process of power transmission from the base power sources to the receiving-end grids via transmission channels.By reviewing existing research in each domain,various factors affecting the base's power transmission capability are elaborated in detail.[Results]The transmission process can be divided into three stages:the base power source,the transmission channel,and the receiving-end grid.In the power source stage,fluctuations in renewable energy and grid-following and grid-forming technologies affect the active power output.In the transmission stage,control strategies of either conventional direct current transmission technology or flexible direct current transmission technology,along with the strength of both sending-end and receiving-end grids,determine the channel's maximum transmission capacity.In the receiving-end stage,single direct current feed-in,multi-direct current technology combination schemes,and multi-direct current coupling affect the receiving-end grid's power acceptance capability.A comprehensive assessment of the base's transmission capacity must integrate the aforementioned factors.[Conclusions]The proposed systematic evaluation method can promote collaborative efforts among stakeholders across different stages.By comprehensively considering the constraints of base capacity planning and transmission-affecting factors,this method provides technical insights and references for accurately assessing the transmission capability of complex systems involving renewable energy bases in desert,gobi and barren areas.
卢婷;张军;韩一杰
国能经济技术研究院有限责任公司,北京市 102211国能经济技术研究院有限责任公司,北京市 102211国能经济技术研究院有限责任公司,北京市 102211
信息技术与安全科学
沙戈荒新能源基地特高压直流输电受端电网受电能力
desert,gobi and barren areasrenewable energy baseultra high voltage direct current transmissionpower receiving capacity of the receiving grid
《电力建设》 2026 (3)
119-134,16
国家社会科学基金重大项目(21&ZD133)国家能源集团科技项目 This work is supported by National Social Science Foundation of China(No.21&ZD133)and National Energy Group Technology Program.
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