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电转气(P2G)设备和燃气机组作为联系电力系统与天然气系统的能源转换单元,是未来多能源互联系统的重要枢纽。在竞争性能源市场环境下,P2G设备和燃气机组如何构造竞价策略是相关各方关注的重要问题。对于P2G设备和燃气机组而言,在构造其参与竞争性电力市场和天然气市场的竞价策略时,这两个市场的出清价格未知,可以采用概率分布或其他方法进行模拟。在此背景下,发展了基于场景分析的P2G设备和燃气机组的最优竞价策略模型。首先,采用拉丁超立方抽样生成含概率信息的场景集合,用于处理采用概率分布模拟的市场出清价格,并对场景进行消减。之后,以收益最大化为目标,分别构建了P2G设备同时参与日前能量市场和调频市场的单独竞价模型及其与燃气机组的联合竞价模型,确定次日各交易时段的竞价策略。然后,针对具体的市场出清结果,采用夏普利值法对P2G设备与燃气机组的收益进行合理分配。最后,用算例对所构建的模型和采用的求解方法加以说明,并分析了P2G设备和燃气机组竞价策略的特征。
Electric gas transfer (P2G) equipment and gas units, as energy conversion units that connect power and gas systems, are important hubs for future multi-energy interconnected systems. Under competitive energy market conditions, how P2G equipment and gas units construct bidding strategies is an important issue of concern to all parties involved. For P2G plants and gas turbines, the clearing prices for these two markets are unknown when constructing their bidding strategy for competitive electricity and gas markets and can be modeled using probability distributions or other means. Under this background, the optimal auction strategy model of P2G equipment and gas turbine based on scenario analysis is developed. First, a set of scenarios containing probability information was generated using Latin hypercube sampling to process market clearing prices using a probability distribution simulation and to reduce the scenario. After that, the bidding model of P2G equipment and its joint bidding with gas units were set up respectively for P2G equipment to participate in the day-ahead energy markets and FM markets, and the bidding strategies for the next trading day were determined. Then, according to the specific market clearing result, the profit of P2G equipment and gas generating units should be rationally distributed by using the Sharply value method. Finally, an example is given to illustrate the model constructed and the solution method used, and the characteristics of bidding strategies of P2G equipment and gas units are analyzed.