基于存量煤电的抽水蓄能电站容量配置与成本收益分析模型

Capacity Allocation and Cost-benefit Analysis Model of Pumped Storage Power Station Based on Stocked Coal Power

摘要:

随着新能源渗透率的不断提高，灵活性调节资源需求逐年加大，抽水蓄能可以有效缓解新能源并网所导致的"峰谷矛盾"问题，亟需研究抽水蓄能参与电力市场机制以及不同运行模式下的成本收益模型。首先，梳理了5种抽水蓄能电站的运营机制；然后，构建了基于存量煤电的抽水蓄能容量配置优化模型，算例结果表明在存量煤电的背景下应对煤电机组进行灵活性改造，使煤电机组全部为开机状态且在全天均保持最小技术出力运行，并基于最小等效负荷配置对应容量的抽水蓄能；最后，建立了抽水蓄能电站不同运行模式下成本收益模型，算例结果表明在完全市场化模式下，抽水蓄能电站收益中电能量收益占67%、调频辅助服务收益占16%、备用辅助服务收益占2%、无功和黑启动等辅助服务收益占15%。

Abstract:

With the increasing penetration of new energy, the demand for flexible regulation resources is increasing year by year. Pumped storage can effectively alleviate the problem of "peak-valley contradiction" caused by new energy grid connection, and it is urgent to study the mechanism of pumped storage participating in electricity market and the cost-benefit model under different operation modes. Firstly, the operation mechanisms of five pumped storage power stations are sorted out, and then an optimization model of pumped storage capacity allocation based on the stocked coal power is constructed. The results show that under the background of stocked coal power, the coal-fired power units should be flexibly reformed, so that all the coal-fired power units are in start-up state, the minimum technical output is maintained throughout the day, and the corresponding capacity of pumped storage is configured based on the minimum equivalent load. Finally, the cost-benefit model of pumped storage power station under different operation modes is established. The research results show that in the fully market-oriented mode, the electric energy income of pumped storage power station accounts for 67%, the auxiliary service income of frequency modulation accounts for 16%, the auxiliary service income of standby accounts for 2%, and the auxiliary service income of reactive power and black start accounts for 15%.