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考虑水电站参与调峰对时段平均出力的限制要求,结合实际电站的典型日出力过程与峰荷分布规律,以水电站的最大出力为随机变量,基于该随机变量服从指数分布的假设,以总调峰效益期望最大为目标,建立了长江三峡-葛洲坝梯级水电站长期优化调度模型,详细分析了三峡-葛洲坝电站单峰调峰、双峰调峰和逐月调峰3种调峰运行方式,计算了相应的分布参数和发电量.计算结果表明:该模型能在长期优化调度中更好地体现电力系统对水电的调峰需求,3种调峰方式运行下三峡-葛洲坝梯级多年平均电量分别是1 080、1 055、1 079亿kW·h,梯级调峰损失电量分别为9.9、34.6、9.5亿kW·h.
Considering the restriction of hydropower station’s participation in peak load regulation in the period, combined with the typical sunrise process and peak load distribution of the actual hydropower plant, taking the maximum output of hydropower station as a random variable, based on the assumptions that the random variable obeys the exponential distribution, Long-term optimal operation model of the Three Gorges-Gezhouba cascade hydropower station has been set up, and the three peak-adjusting operation modes of the Three Gorges-Gezhouba Hydropower Station have been analyzed in detail. The results show that the model can better reflect the peak demand of power system for hydropower in long-term optimal operation. The multi-year average power of the Three Gorges-Gezhouba cascade under the three peak regulation modes is respectively 1 080 , 1055.1797 billion kW · h, and the peak peaking power loss was 9.93, 4.46, and 9.5 billion kW · h, respectively.