气电虚拟电厂多能源市场竞标策略

Bidding Strategies for Gas-Electricity Virtual Power Plants in Multi-energy Market

针对虚拟电厂竞标中需求响应、风电出力的不确定性造成的风险,利用新型电转气技术和燃气轮机快速调节能力,构成含气电双向转换的气电虚拟电厂,提出气电虚拟电厂的多能源市场竞标模型,同时参与电力市场和天然气市场的竞标。模型以气电虚拟电厂总利润最大为目标,不确定性表达为需求响应、风电出力的误差概率分布,并通过抽样和筛选确定场景描述。算例结果表明:含气电双向转换的气电虚拟电厂通过在2个市场中灵活竞标,获得了更高的竞标利润;控制燃气轮机和电转气出力,显著降低了不平衡惩罚成本。气电虚拟电厂扩展了虚拟电厂的竞标市场,有利于将来虚拟电厂根据不同电价和气价波动切换能源形式。

In order to solve the problem of virtual power plant bidding risk caused by uncertainty of wind power and demand response,a gas-electricity virtual power plant with bidirectional conversion function is built by using the new power-to-gas technology and the quick adjusting ability of gas turbine,and a multi-energy market bidding model is proposed for bidding of power market and the natural gas market.By taking the maximum profits of gas-electricity virtual power plant as its optimization objective,the model uses the error probability distribution to express the uncertainty of demand response and wind power output,and determines the scenario description through sampling and filtering.The simulation results show that the gas-electricity virtual power plant of bidirectional conversion can obtain higher bidding profits through flexible bidding in the two markets;and the imbalance penalty cost can be reduced substantially through controlling the gas turbine and power-to-gas output.The gas-electricity virtual power plant can extend the virtual power plant bidding market,which is helpful for virtual power plant to switch the energy form in the future according to different price fluctuations of gas and electricity.