小水电与大中型水电分区输电限制优化调度模型

The Optimal Operation Model of Large-middle Scale and Small Hydropower With the Constraints of Transmission Capacity in Given Areas

针对小水电大规模接入条件下与大中型水电的协调调度问题,在小水电负荷率与大中型水电区间流量相关分析基础上,以可消纳电量最大为优化目标,考虑输电能力限制条件,建立小水电与大中型水电分区输电限制优化调度模型,并提出基于优化模型的可识别输电瓶颈的水电消纳量随输电能力提高增长率的指标分析方法。云南德宏地区的实例研究表明,所提方法能充分考虑输电能力对水电消纳的限制,有效提高水电消纳电量,提高大小水电协调调度效益。同时有效利用大水电调节能力和小水电长期发电能力特性,为输电线路扩容的效益分析提供指导。

To solve the problem of operational cooperation faced by large-middle scale hydropower when numerous small hydropower who connecting the grids, a model for the optimal operation of the large-middle scale hydropower under the limitation of transmission capacity while transmitting via grids with small hydropower in given areas was proposed. The proposed method regards the maximum absorption of hydroelectricity as the optimal objective under the constraints of transmission capacity, and the model is based on the correlation analysis of the regional flow of large-middle scale hydropower and the load of small hydropower. Moreover, the index and the relative analysis method for the increasing absorption of hydroelectricity along with the improved transmission capacity were developed. The numerical results from Dehong, Yunnan illustrates the proposed method can effectively facilitate the absorption of hydroelectricity, which contributes to the benefits of cooperation among large-middle scale and small hydropower while perfectly considering the limitation of transmission capacity. Furthermore, the proposed index and analysis method can offer useful advices for the expansion of transmission capacity, which takes account of the characteristics of long-term generation ability of small hydropower.