考虑机组发电量约束的短期电能计划安全校正

在编制短期发电计划时,为保证机组年度、月度合同电量的完成,需要对部分机组的日发电量进行限定,电能计划安全校正优化计算需要考虑这类约束.发电量属能量量纲,而安全校正模型中优化变量为机组出力,属功率量纲,且分时段独立建模,这给引入该约束造成一定困难.本文综合分析了机组发电量约束及安全校正计算的特点,提出了一种有效的处理方法,通过修正机组出力可调整量约束,将发电量约束隐含于各越限时段的建模和计算过程中,在安全校正计算完成后自然得到满足.提出了电量分解算法及动态修正步骤.该处理方案只修正约束值,不增加约束条件个数,实用性强.在某省调的实际应用结果证明了解决方案的有效性.

Security Correction of Short-Term Energy Scheduling with Unit Generation Amount Constraint

When scheduling the short-term power generation, in order to fulfill the units’ annual and monthly contract, some units’ daily generation amount should be constrained. Such constraints should be taken into account when calculating optimal security correction. The generation amount is an energy dimension, but the optimal variables in unit generation is a power dimension and is period-divided modeling, which causes trouble in the introduction of the constraint. Based on the comprehensive analysis of the features of both unit generation amount constraint and security correction model, a novel solution by revising the constraints of adjustable amount of unit generation power is proposed, in which the generation amount constraints are implicit in the period-divided modeling and calculation process and be met naturally when calculation is finished. Two key algorithms, the generation amount decomposition and the dynamic revising, are also proposed in the paper. The solution only modifies the value of constraints, and does not increase the number of constraints, so it has strong practicability. The actual application example achieves expect in a province power dispatching＆communication center, as demonstrates the solution be effective.