虚拟电厂内多类型小规模火电机组一次调频能力互补提升

Complementary Improvement of Primary Frequency Modulation Capability of Multi-type Small-scale Thermal Power Units in Virtual Power Plant

针对小型火电机组发电负荷小、一次调频能力不足、无法纳入虚拟电厂框架下的问题,本文采用将小型火电机组进行改造并将多台小型火电机组耦合的方式,提高了小型火电机组的一次调频负荷变化幅度和新能源消纳能力。选取机组热电相关参数,采用EBSILON Professional软件对其进行模拟仿真,对多个机组的调峰负荷空间进行评估并进行对比分析。利用Python语言计算多台小型机组深度耦合负荷变化能力,用于虚拟电厂负荷调度指令的制定。计算结果表明:机组经过抽汽改造后,3台机组可以耦合协力达到国家的上网标准;在满足标准的同时,在不同的工况下,多机组耦合最多可以容纳7.36 MW的其他能源,最多为热网供热163.66 MW;3台机组平均煤耗率最低可达到890.40 kg/(kW·h)。

Aiming at the problems of small generation load and insufficient primary frequency modulation capacity of small thermal power units,which cannot be included in the framework of virtual power plant,this paper improved the primary frequency modulation capacity and new energy absorption capacity of small thermal power units by transforming small thermal power units and coupling several small thermal power units.The parameters related to the thermoelectricity of the unit were selected.EBSILON Professional software was used to simulate the unit,and the evaluation and comparative analysis of the peak regulation load space of multiple units were conducted.Python language was used to calculate multiple small-scale units′deep coupling peaking potential for drawing up virtual plant load dispatching instructions.The calculation results show that all three units′coupled capacity can meet the national feed-in tariff after the extracted steam modification.Meanwhile,under different working conditions,the multi-unit coupling can accommodate up to 7.36 MW of other energy sources,and up to 163.66 MW of heat supply for the heat network.The average coal consumption rate of the three units can reach 890.40 kg/(kW·h).