新能源并网下混合式抽水蓄能电站竞价策略

Bidding strategy for hybrid pumped storage power stations in integration of new energy sources into grid

随着我国西北地区新能源规模不断增长,弃风、弃光问题日益突出,建设具有更大储能容量的混合式抽水蓄能电站是目前最具有实践价值的解决方案,研究其在现货市场中的竞价策略具有重要意义。本文以黄河上游规划建设中的梯级混合式抽水蓄能电站为研究对象,构建了一个Stackelberg博弈模型,通过解决一个双层优化问题来实现其在日前市场中的利润最大化,其中,上层代表电站收入最大化问题,下层包括独立系统运营商面临的出清问题。结果表明,日前市场中,混合式抽水蓄能电站会在高电价时放水发电,低电价时抽水蓄能,电站与新能源通过打捆方式参与市场竞价的收益要高于两者联合但不打捆参与方式,且均高于混合式抽水蓄能电站单独参与市场竞价的收益。

With the scale of new energy growing continuously in Northwest China,the issue of wind and solar energy curtailment has become increasingly prominent.The most practical solution at present is to construct hybrid pumped storage power stations with greater energy storage capacity.Studying its bidding strategy in the spot market is of great significance.This paper constructs a Stackelberg game model and applies it in a case study of the cascade hybrid pumped storage power station under construction in the upper reaches of the Yellow River.For the power station,this model aims to maximize its profit in the day-ahead market by solving a bi-level optimization problem:the upper level for maximizing its revenue and the lower for solving the clearance problem faced by independent system operators.The results show that in the day-ahead market,this hybrid station will generate electricity by releasing water during high electricity prices,and pump water for energy storage during low prices.The revenue of the power station and new energy participating in the market through bundled bidding is higher than that of the joint participation without bundling,and both are higher than that of the hybrid station participating in the market alone.