中文摘要：

以发、用电企业让、索价幅度排序结果进行高低匹配的大用户直购电集中撮合交易方法,虽然可以使价格起点差异的各交易方处于相同的竞价起点,但缺乏对能效和输配电价约束的直接考虑。文中在让、索价排序结果的基础上,综合考虑节能减排性能,对处于同一价格序位上的企业赋予不同的交易优先级,保护了高能效机组和用户的交易优先权。另外,针对具体交易规则,追加考虑了输配电价约束,并比较分析了3种违约处理方式：①对用电企业与发电企业预成交价格差低于输配电价要求的,不允许成交;②对预成交价格差低于输配电价要求的,先按合理方式调整发、用电企业成交价,在满足输配电价约束后再成交;③对预成交价格差低于和高于输配电价要求的,均按合理方式调整发、用电企业成交价,在满足输配电价约束后再成交。算例表明所提出的方法在拓展直购电交易空间的基础上,进一步保护了性能占优机组和用户的交易优先权,以及撮合中介方的基本利益,有效地促进了发、输、用及社会环境的多方共赢。

英文摘要：

The transaction mode of direct power purchase based on the ranking of the charge and undercut prices of power generation corporations and power consumers may bring traders with different bidding price levels to the same initial bidding level.However,this mode can not directly consider the energy saving and emission reduction indexes as well as power transmission and distribution price restrictions.Based on the ranking results of this mode,the energy saving and emission reduction characteristics are considered comprehensively by giving different transaction priorities to the traders at the same price level to guarantee the transaction priorities of corporations and consumers with higher efficiencies.Meanwhile,the transmission and distribution price restrictions are included in the market clearing rules.Three strategies are designed to deal with the restriction violations：（1）if the pre-transaction price difference between power consumers and power generation corporations is less than the fixed transmission and distribution price,trade is not allowed;（2）if the pre-transaction price difference is less than the fixed transmission and distribution price,transaction prices are firstly modified to the fixed transmission and distribution price and then trade is allowed;（3）no matter whether the pre-transaction price difference is less or higher than the fixed transmission and distribution price,transaction and distribution prices are firstly modified to the fixed transmission and distribution price and then trade is allowed.Case studies show that the proposed method can protect the priority of the traders with high efficiencies and the benefits of intermediate agency,and can effectively promote the multi-wins within the generation,transmission,distribution,consumption and social environments.