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.