含储热的电力系统电热综合调度模型

Combined heat and power dispatch model for power system with heat accumulator

分析了热电机组配置储热前后运行特性与调峰能力的变化情况,讨论了利用储热消纳弃风的基本运行机理,建立了含储热的电力系统电热综合调度模型。与传统模型相比,新模型增加了系统热平衡约束、热电机组的热电耦合约束、储热装置运行约束等,且模型目标扩展为供电和供热总煤耗最低。算例分析表明:所提模型是有效的;在热电厂中配置储热可有效提高电网的风电消纳水平,且消纳单位电量风电的节煤量要高于电锅炉消纳方案。

The operational characteristics and peaking capacity of CHP（Combined Heat and Power） unit with and without heat accumulator are analyzed ,the basic operating mechanism of wind power accommodation by heat accumulator is discussed,and the CHP dispatch model with heat accumulator is built. Compared with the traditional model, the built model has additional restraints ： the system heat balance, the thermoelectric coupling of CHP unit and the operation of heat accumulator,and takes the minimum total coal consumption for both electricity and heat as its objective. Case study verifies that,the proposed model is effective,the CHP plant with heat accumulator can effectively improve the wind power accommodation level of power grid, and the coal saved per 1 MW＂ h wind power accommodation by heat accumulator is better than that by electric boiler.