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复杂约束限制下的梯级水电站群实时优化调度方法及调整策略

DOI: 10.13334/j.0258-8013.pcsee.2015.17.006, PP. 4326-4334

Keywords: 梯级水电,实时,机组限制区,日前计划,出力平稳性,弃水

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Abstract:

由于负荷预测偏差、径流预报不准确,如何快速、可靠地调整发电计划是梯级水电群实时调度中的难点和关键问题,主要体现在快速躲避机组限制区、兼顾电站日前计划和出力平稳性、最小化电站弃水等3个方面。针对上述问题,提出复杂约束限制下的梯级水电站群实时优化调度方法及调整策略,包括电站计算序位确定、电站组合确定、负荷偏差光滑处理、厂间负荷偏差分配和弃水调整策略。引入负荷偏差光滑技术,重构负荷偏差,保证厂间负荷偏差满足出力平稳性要求;在厂间负荷偏差分配过程中,协调日前计划,动态调整电站出力,避免落入机组限制区;采用弃水修正策略,沿约束边界调整电站出力,实现预泄腾库。所提方法和策略,能够充分考虑日前发电计划指导性,避免电站出力频繁波动,保证机组实时躲避限制区运行,避免不必要弃水发生。贵州电网乌江流域梯级水电站群厂网协调实际过程模拟分析表明,所提方法和策略能够快速可靠地满足实际工程要求,是一种是切实可行的方法和策略。

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