Hydro-thermal-wind-photovoltaic coordinated operation considering the comprehensive utilization of reservoirs
Hydro-thermal-wind-photovoltaic coordinated operation considering the comprehensive utilization of reservoirs
复制标题
考虑水库综合利用的水热风光电协调运行
DOI：
10.1016/j.enconman.2019.111824
复制
发表时间：
2019
影响因子：
10.4
通讯作者：
Wang Yimin
中科院分区：
文献类型：
--
作者：
Wang Xuebin;Chang Jianxia;Meng Xuejiao;Wang Yimin
随着新能源在电力系统中的日益广泛应用，给电力系统的运行带来了新的挑战，也增加了调峰机组的运行难度。在多能源电力系统中，水电厂不仅要进行调峰以降低火电波动，还要平衡新能源发电量的波动。但各用水部门的综合要求，严重制约了水电站的调节能力。通过设定不同的水资源可利用情景，探讨了水电站群的出力与协调效益之间的关系。为此，提出了考虑水库综合利用的水火风光互补电力系统协调运行模型。该模型利用水电厂的调峰能力，以最大限度地增加清洁能源发电量和最小化剩余负荷波动为目标。在该模型中，采用自适应的水电厂同时调峰策略，确定合理的、可执行的水电厂发电计划。以青海电网为例，通过与未采用相同策略的模型进行比较，验证了该模型的有效性。并对冬、夏季不同日平均出流情况下的结果进行了分析，探讨了不同季节水电站日出流的适宜范围。结果表明，该模型能增加新能源发电量，降低火电出力波动，改善梯级水电站的运行性能。日平均出流量对水电站的运行影响很大，并进一步影响其他能源的运行。在此基础上，对青海电网水电站冬、夏季的合理日平均出力进行了评价。该研究可为大规模新能源和多水电站电力系统日运行计划的制定提供思路，也可为水电系统协调运行提供参考。
The increasing integration of new energy into the power system has brought new challenges to the operation of the power systems and increased the operation difficulty of peak shaving plants. In the multi-energy power systems, the hydropower plants not only conduct peak load regulation to reduce thermal power fluctuation, but also balance the new energy power output fluctuation. However, the comprehensive requirements of various water-using departments have severely restricted the regulating capacity of hydropower stations. This paper aims to explore the relationship between the outflow of hydropower plants and coordinated effectiveness by setting different water availability scenarios. For this purpose, a coordinated operation model of power systems with hydro-thermal-wind-photovoltaic power considering the comprehensive utilization of reservoirs is proposed. The model seeks to maximize the clean energy power generation and minimize the remaining load fluctuation by taking advantage of the peak regulation capacity of hydropower plants. In the model, the adaptive simultaneous peak regulation strategy of hydropower plants is used to determine reasonable and executable hydropower generation plan. Qinghai power grids is selected as a case study to verify the effectiveness of the proposed model compared to a model without the same strategy. Moreover, the results under various average daily outflow in winter and summer are analyzed to explore the appropriate ranges of hydropower plants daily outflow in different seasons. The results show that the proposed model can increase the new energy power generation, decrease the thermal power output fluctuation, and improve the operation performance of cascade hydropower plants. The average daily outflow has high impact on the operation of hydropower plants and further influences the operation of other energy sources. Furthermore, the appropriate average daily outflow of hydropower plants in Qinghai power grids in winter and summer are evaluated. This study can provide an approach to make daily operation plan for power systems with large-scale new energy and multiple hydropower plants, as well as provide reference for the coordination between hydraulic and electrical power systems.