摘要
在“双碳”目标下,未来全可再生能源直流送端系统的建设成为可能。而以风电光伏为代表的可再生能源,其随机波动性及不确定性难以满足多场景下直流送出需求,对送端系统运行调度带来了极大挑战。与此同时,光热发电以其优异的调节能力得以快速发展,为解决上述问题提供了新思路。然而,光热发电装机容量需要满足可再生能源众多运行场景下直流送出的需求,如何合理配置光热发电装机容量以避免场景多样性对直流外送带来的影响,是当前亟待研究的问题。为此,本文提出了适应多场景下满足直流送出需求的光热发电最优装机容量优化配置方法。首先划分了全可再生能源系统典型运行场景,其次在光热电站调节模型基础上引入条件风险价值来描述运行场景不确定性,以弃电成本最小为目标,结合直流联络线各约束,构建适应多场景下满足直流送出需求的光热发电最优装机容量优化配置模型,提出光热发电最优装机容量优化配置方法,最后,通过算例验证该光热发电最优装机容量配置方法的有效性。
Under the goal of “double carbon”, the construction of all renewable energy DC transmission system will be possible in the future. The random fluctuation and uncertainty of renewable energy represented by wind power photovoltaic are difficult to meet the DC transmission demand in multiple scenarios, which brings great challenges to the operation and scheduling of the transmission end system. At the same time, concentrating power generation has developed rapidly with its excellent regulation ability, which provides a new idea to solve the above problems. However, the installed capacity of solar thermal power generation needs to meet the demand of DC transmission under many operation scenarios of renewable energy. How to reasonably configure the installed capacity of solar thermal power generation to avoid the impact of scenario diversity on DC transmission is an urgent problem to be studied. Therefore, this paper proposes an optimal allocation method of the optimal installed capacity of concentrating power generation to meet the DC transmission demand in multiple scenarios. Firstly, the typical operation scenarios of all renewable energy system are divided. Secondly, based on the regulation model of solar thermal power station, conditional value at risk is introduced to describe the uncertainty of operation scenario. Aiming at minimizing the power abandonment cost and combined with the constraints of DC tie line, the optimal installed capacity allocation model of solar thermal power generation is constructed to meet the DC transmission demand in multiple scenarios, and the optimal installed capacity allocation method of solar thermal power generation is proposed. Finally, an example is given to verify the effectiveness of the optimal installed capacity allocation method for solar thermal power generation.
