基于负荷转移的钢铁企业自备电厂发用电联合优化模型

摘要

基于分时电价对于机组生产安排和可转移负荷工作时段安排的影响,建立了含自备电厂的钢铁企业发用电联合优化模型.在精确电平衡分析的基础上得出可转移负荷,计及负荷的不确定性,由最小用电成本得出机组的出力分配,进而联合负荷转移模型和价格约束得出负荷运行时间.算例结果表明,不同上网电价对于可转移负荷安排的影响不同,企业要取得最大的经济利益,必须合理利用分时电价安排可转移负荷和优化机组,降低发电成本.%On the basis of influence of time of use (TOU) price on generator production schedule and transferable load schedule in the work time, this paper establishes a combined optimized model for power generation and consumption in steel companies with autonomous power plants. It obtains transferable load based on accurate analysis on electric equilibrium, and considering uncertainty of load, it works out output distribution of the generator from the minimum power consumption cost and then calculates load operating time by combining the load shifting model and price constraint. Example result indicates that electricity price of different peak time has different influence on transferable load schedule, and the company must reasonably make use of TOU price to arrange transferable load and optimize the generator as well as reduce power generation cost so as to acquire the maximum economic benefit.