分布式冷热电三联供系统节能协调优化调度

Energy-Saving Coordinated Optimal Dispatch of Distributed Combined Cool, Heat and Power Supply

分布式冷热电三联供将是能源利用的重要发展方向。为了揭示冷热电三联供生产成本和环境成本的潜在特性,引入供热当量性能系数,将冷、热、电能量等价转化,提出了新的冷热电联供生产成本和环境成本目标函数。针对冷热、电负荷需求的不匹配性和随机性,考虑机组运行在不同的冷热电生产状态下,结合分时电价,设立了冷热电协调成本函数。由此建立了含生产成本、环境成本和冷热电协调成本的多目标节能调度模型。运用目标隶属度函数模糊算法,将其转化为单目标优化并利用二次规划法求解。算例仿真结果表明,所提出的分布式冷热电联供节能调度的模型和方法,对能源高效利用、电力经济调度和污染排放减少是有效的。

Distributed combined cool, heat and power （DCCHP） is being developed into important trend of energy source utilization. To reveal the potential characteristics of both production cost and environment cost of DCCHP, the equivalent performance coefficient of heat supply is led in for the equivalent conversion among cool, heat and power, and a new objective function of production cost and environment cost of DCCHP is proposed. According to the unmatched property and randomness of the demand on cool, heat and power loads and considering the condition that generation units are operated in different production states of cool, heat and electric power, combining with time-of-use （TOU） price a cost function for the coordination of cool, heat and power is put forward, and on this basis a multi-objective energy-saving dispatching model, in which the production cost, environment cost and coordination cost for cool, heat and electric power are included, is built. Using the principle of maximum membership, the proposed model is turned into single object optimization problem and solved by quadratic programming. Results of case simulation show that the proposed model and method for energy-saving optimal dispatch of DCCHP is effective in high efficient utilization of energy source and economic power dispatching and pollution emission reduction.