CAJ | 학술논문

受到水电站的出库流量的影响,梯级水电站间的水流滞时是动态变化的,如果将水流滞时作为常数考虑,会导致水电优化调度结果的偏差.将水流滞时表示成电站出库流量的函数形式,建立了考虑动态水流滞时的短期梯级水电优化调度模型.动态水流滞的引入,使得短期梯级水电优化调度中的优化变量在大小和时间两个维度上变化,采用常规算法直接求解困难.针对所建立模型的特点,提出了结合逐次逼近法和混合整数线性规划法的求解方案,以逐次逼近法构造了逐步逼近精确水流滞时的迭代流程,迭代流程中每次迭代为一个常规短期梯级水电优化调度问题,采用混合整数线性规划法进行求解.一个两电站测试系统和某8水库的实际梯级水电系统的算例结果表明了所提出模型和方法能够有效提升梯级水电系统的经济效益.
수도수전참적출고류량적영향,제급수전참간적수류체시시동태변화적,여과장수류체시작위상수고필,회도치수전우화조도결과적편차.장수류체시표시성전참출고류량적함수형식,건립료고필동태수류체시적단기제급수전우화조도모형.동태수류체적인입,사득단기제급수전우화조도중적우화변량재대소화시간량개유도상변화,채용상규산법직접구해곤난.침대소건립모형적특점,제출료결합축차핍근법화혼합정수선성규화법적구해방안,이축차핍근법구조료축보핍근정학수류체시적질대류정,질대류정중매차질대위일개상규단기제급수전우화조도문제,채용혼합정수선성규화법진행구해.일개량전참측시계통화모8수고적실제제급수전계통적산례결과표명료소제출모형화방법능구유효제승제급수전계통적경제효익.
@@@@Affected by changing outflow, the flow delay between cascade hydropower stations is a dynamic parameter in short term cascade hydropower optimal scheduling. The constant flow delay will lead to errors in optimal results. Given the function between flow delay and outflow, a short term cascade hydropower optimal scheduling model considering dynamic flow delay is presented. However, through considering dynamic flow delay, variables can be optimized in both quantity and time dimension, which makes the short term cascade hydropower optimal scheduling hard to be solved directly by ordinary algorithm. A hybrid approach is proposed to tackle this difficulty, in which the iterative method actuates an iterative procedure to approximate the real flow delay and the mixed-integer linear programming is adopted to solve ordinary short term cascade hydropower optimal scheduling problem. The efficiency of the proposed method is demonstrated using a test system and a real system which contains eight reservoirs.