可再生能源消纳责任权重制下电力市场优化决策模型

Optimization Decision Model of Electricity Market Under Renewable Portfolio Standards

可再生能源消纳责任权重制与电力现货市场建设并行推进,实际消纳可再生能源电力将成为电力用户完成考核要求的主要完成方式,并且可再生能源电力也将逐步进入电力现货市场参与交易。基于以上框架建立了可再生能源消纳责任权重制下包含可再生能源日前市场、常规能源日前市场、实时市场的双层多主体优化决策模型,通过库恩-塔克(KKT)条件、强对偶定理、二进制拓展法等方法将其转化为混合整数线性规划模型来求解市场均衡点。算例分析探究了考核权重指标、绿色电力证书价格、可再生能源功率渗透率对市场均衡点的影响。分析结果表明,在市场均衡点日前市场中,可再生能源电力出清电价等于常规能源出清电价加上绿色电力证书价格,且随着可再生能源功率渗透率提高,电力现货市场出清电价呈现下降趋势。

Renewable portfolio standards have been promoted in parallel with the construction of electricity spot markets. The actual accomodation of renewable energy power will become the main way for power users to fulfill the assessment requirements of renewable portfolio standards, and renewable energy power will gradually participate in the electricity spot market transactions.Based on the above framework, a bilevel optimization decision model of multi-entity including the renewable energy day-ahead market, conventional energy day-ahead market, and real-time market is established under the renewable portfolio standards, and it is transformed to a mixed-integer linear programming model to solve the market equilibrium through Karush-Kuhn-Tucker conditions, strong duality theorem, binary expansion method, etc. Case study explores the impact of assessment weight indicators, green certificate prices, and penetration rate of renewable energy power on the market equilibrium. The results show that at the market equilibrium, the day-ahead market clearing price of renewable energy electricity is equal to that of conventional energy plus the green certificate price, and with the increase in the power penetration rate of renewable energy, the clearing price of the eletricity spot market showes a downward trend.