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风电-火电-抽水蓄能联合优化机组组合模型

DOI: 10.13334/j.0258-8013.pcsee.2015.04.002, PP. 766-775

Keywords: 机组组合,多源联合优化,风电,抽水蓄能,置信区间

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Abstract:

大规模间歇式能源出力的不确定性给电网的安全经济运行提出新的挑战,研究间歇式能源接入下的多源联合优化机组组合模型对提高电网运行的安全性和促进间歇式能源的消纳具有重要意义。基于对风电不确定性及抽水蓄能运行机理分析,采用置信区间法进行风电不确定性建模,并提出新的系统调节能力约束,从而建立了考虑风电不确定性影响及抽蓄水头变化影响的联合优化机组组合模型。采用6节点系统验证模型的有效性,研究了抽蓄容量及置信区间选择对发电成本、机组组合及其可靠性的影响。结果显示,风电、火电装机不变的情况下,要保证机组组合的可靠性达99%以上,抽蓄发电装机占比分别为5.6%和10.5%时,与无抽蓄时相比可以分别减少16和17个开机时段,发电成本可以分别降低4.6%和6.8%。通过算例的论证,表明该机组组合模型能够实现多元能源的协调优化和给定置信区间内的风电的有效消纳。

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