计及机会约束规划的园区能量枢纽经济调度

Economic dispatch of an energy hub in a business park considering chance constrained programming

能量枢纽(Energy Hub,EH)是实现多种能源互补利用的载体,而园区级能量枢纽中存在着大量的不确定性因素,包含可再生能源出力波动、负荷预测偏差、机组故障、外界环境及用户用能规律等。构建了一个包含冷热电联产系统、蓄热设备、电动公交车换电站的商业园区能量枢纽模型,研究了在不确定性因素下园区能量枢纽经济运行问题。以最小综合运行成本为目标函数,提出了一种计及机会约束规划的园区能量枢纽经济调度模型,将燃气轮机热电备用出力、后备电力市场购电设置为能量枢纽机会约束。所建模型为典型的0-1混合整数线性规划问题,基于Matlab/Yalmip/Cplex解算器进行求解。算例分析了不同运行场景、置信水平对园区能量枢纽经济调度的影响,结果表明:所建立的模型能够协调多种能源的运行,可以为方案决策者在风险与经济之间提供参考。

The Energy Hub(EH)is a carrier for realizing the complementary use of multiple energy sources.There are many uncertain factors in the park-level energy hub,including renewable energy output fluctuations,load forecast deviations,unit failures,external environment and user energy consumption laws.This paper builds an energy hub model of a business park that includes a combined heat and power system,heat storage equipment,and electric bus battery swapping station,and studies the economic operation of the park's EH under uncertain factors.Taking the minimum total operating cost as the objective function,this paper proposes an economic dispatch model of the park energy hub that takes into account the chance-constrained planning.The gas turbine thermal power reserve output and the reserve power market power purchase are set as energy hub opportunity constraints.The model built in this paper is a typical 0-1 mixed integer linear programming problem,which is solved with the aid of the Matlab/Yalmip/Cplex solver.The example analyzes the impact of different operating scenarios and confidence levels on the EH economic dispatch of the park.The results show that the model established in this paper can coordinate the operation of multiple energy sources,and can provide a reference between the risk and the economy for scheme decision makers.