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跨省送电梯级水电站群调峰调度两阶段搜索方法

DOI: 10.13334/j.0258-8013.pcsee.2014.28.009, PP. 4817-4826

Keywords: 梯级水电站,优化调度,调峰,两阶段搜索,跨省电网

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Abstract:

中国水电大规模跨省跨区输送为调控配置多个电网间优质资源以缓解日益严重的调峰压力提供了重要途径。该文以跨省送电梯级水电站群调峰问题为背景,提出一种两阶段搜索方法。第一阶段采用负荷重构策略将多个省级电网差异极大的负荷曲线重构为一条总负荷,在此基础上采用变尺度优化方法确定水电站出力过程,避免电网间负荷大小和高峰低谷等特性不同导致的出力搜索困难;第二阶段提出外点搜索方法优化电站出力在受端电网间的分配过程,采用逐次切负荷生成初始解,并将负荷高低作为启发信息,迭代修正各受端电网的高峰电力大小,以满足多个电网调峰要求。提出的方法通过华东电网新-富梯级和中国南方电网红水河干流梯级水电站群调度得到验证,2个实例的应用结果都满足多个省级电网调峰需求,较实际调度的调峰效果更为显著。

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