考虑工业园区CHP机组动态约束的低碳经济调度

具备快速电出力调节能力的热电联产(combined heat and power,CHP)机组能够提升工业园区电热耦合系统运行灵活性,促进新能源消纳,降低碳排放压力。采用微分方程形式建立CHP动态约束能够详细描述变量的变化情况,在调度中考虑动态约束能够掌握机组运行状态,降低事故风险。为此,以考虑碳交易过程的工业园区最小成本为目标,建立考虑CHP动态约束的工业园区低碳经济调度模型。然后基于序贯法框架,采用有限元正交配置法对模拟层的微分代数方程进行离散,并采用改进自适应差分进化算法求解优化层非线性规划问题。算例结果表明,有限元正交配置法能够以较少的离散点数获得较为精确的结果,提升了求解效率,验证了具备快速电出力调节能力的CHP机组能有效提升工业园区低碳经济水平。

Low-Carbon Economic Dispatching in Industrial Park Considering Dynamic Constraints of CHP Units

The CHP unit with fast power output adjustment can improve the operation flexibility of the electrothermal coupling system in the industrial park and promote the absorption of new energy and reduce carbon emission. The CHP dynamic constraints in the form of differential equations can describe the variation of variables in detail, and considering dynamic constraints in dispatching can grasp the operation state of units and reduce the risk of accidents. Therefore, aiming at the minimum cost of industrial parks and considering carbon trading process, a low-carbon economic dispatching model of industrial parks considering CHP dynamic constraints is established. Then, on the basis of the sequential framework, the differential algebraic equations of the simulation layer are discretized by the orthogonal configuration method on finite element, and the nonlinear programming problem of the optimization layer is solved by the improved adaptive differential evolution algorithm. The results of examples show that the orthogonal configuration method can obtain accurate results with fewer discrete points, improve the solving efficiency, and the CHP unit with fast power output adjustment can effectively improve the low-carbon economic level of the industrial park.