基于二级热网储热式电锅炉调峰的弃风消纳调度模型

针对"三北"地区冬季供暖期弃风严重问题,在二级热网配置调峰电锅炉日调峰方案的基础上,探讨应用储热式电锅炉来进一步消纳弃风。在计及热网延时与衰减特性基础上,分析了储热式电锅炉的消纳弃风机理,提出了储热式电锅炉的电热转换启动条件,构建了储热式电锅炉的数学模型以及基于二级热网储热式电锅炉日调峰的热电联合系统调度模型。对比分析了储热式电锅炉配置方式、储热容量、风电渗透率对弃风率的影响。算例分析表明,在二级热网中配置储热式电锅炉可进一步消纳弃风且效果更好。电锅炉的储热容量越大,弃风率越低。

Dispatching Model of Wind Power Accommodation Based on Heat Storage Electric Boiler for Peak-load Regulation in Secondary Heat Supply Network

There is a serious problem of wind power abandoning during winter heat supply period in Northeast, North, and Northwest China. The application of heat storage electric boiler to further accommodate wind power is discussed based on the strategy of peak-load regulation by installing a heat storage electric boiler in the secondary heat supply network. Based on the delay and attenuation characteristics of heating network, the mechanism to improve wind power accommodation through the heat storage electric boiler is analyzed. The condition of electro-thermal conversion start-stop for the heat storage electric boiler is proposed. The mathematical model of the heat storage electric boiler and the dispatching model of the electricity-heating combined system based on the heat storage electric boiler for daily peak-load regulation at the secondary heat supply network are developed. The influence of configuration modes of heat storage etectric boiler, heat storage capacity and wind power penetration capacity on the rate of wind power curtailment are compared and analyzed. The case analysis shows that configuring the heat storage electric boiler at the secondary heat supply network can further accommodate wind power and provide better results. The larger heat storage capacity of electric boiler, the lower the rate of wind power curtailment.