School of Electrical Engineering Guangxi University
动态库容灵活性为消纳可再生能源提供了新的途径。然而，水库径流量具有不确定性，利用动态库容动态调整汛期水位上限可能出现防洪库容不足的情况。对此，本文提出考虑水电动态库容运行风险的电力系统分布鲁棒经济调度方法，在考虑动态库容灵活性的同时计及径流量不确定性，合理安全地利用梯级水电库容灵活性，促进可再生能源的消纳。首先，基于梯级水库径流量的历史数据集，构建表征水电动态库容边界不确定的运行风险模型，进而提出考虑梯级水电动态库容运行风险的两阶段分布鲁棒模型，第一阶段为制定机组启停计划的日前调度方案，第二阶段基于日前调度计划通过调整机组出力以应对径流量的不确定性。然后，利用线性化技术将非线性模型转化为线性问题，并采用列约束生成(column-and-constraint generation，CCG)算法求解。最后，通过IEEE 30节点算例系统验证动态库容对水电消纳的提升效果和分布鲁棒优化方法的有效性。
Dynamic storage capacity flexibility adjusting the reservoir storage capacity provides a new way to consume hydropower. However, the inflow of water from a reservoir is uncertain, and the use of dynamic storage capacity dynamically adjusting the upper limit of the water level during the flood season will lead to insufficient flood control storage capacity. In view of this, this paper proposes a distributionally robust economic dispatching method of power system considering the operational risks of dynamic hydropower capacity. It takes into account the uncertainty of runoff while considering the flexibility of dynamic hydropower capacity, and makes reasonable and safe use of the flexibility of cascade hydropower capacity to promote the absorption of renewable energy. Firstly, based on the historical data set of cascade reservoir runoff, the operation risk model representing the uncertain boundary of hydropower dynamic storage capacity is constructed, and then the two-stage distributionally robust model considering the operation risk of cascade hydropower dynamic storage capacity is proposed. The first stage is to develop the day-ahead scheduling scheme of the unit start-stop plan. The second stage is based on day-ahead dispatching plan by adjusting unit output to deal with the uncertainty of runoff. Then, the linearization technique was used to transform the nonlinear model into a linear problem and the column-and-constraint generation(CCG) algorithm was used to solve the problem. Finally, the numerical results on the IEEE-30 bus system verify the effectiveness of the proposed model.
吴晖锽,陈峰,代伟,等. 考虑水电动态库容运行风险的电网分布鲁棒经济调度方法[J]. 科学技术与工程, , ():复制