两台不同容量配电变压器的经济运行方法研究

Research on the economic operation method of two distribution transformers with different capacity

针对两台不同容量配电变压器的经济运行问题,研究了两台不同容量配电变压器的运行方式以及经济运行区间。根据变压器运行时损耗最小的运行原则,给出了两台不同容量配电变压器的运行方式,建立了数学模型,推导出了临界负荷S'的计算公式,通过优化方法求解了临界负荷S″。提出了根据临界负荷S'和S″确定经济运行区间的方法。在两台不同容量配电变压器同时运行时,根据降损效果最明显的原则,推导出了负荷在两台变压器之间的最优分配的公式。通过算例的计算分析,该文提出的方法为两台不同容量配电变压器的经济运行提供了理论依据,方便了各台变压器所带负荷的确定。

Arming at the problem of economic operation of the two different transformers, the operation mode and economic operation area were studied in this paper. According to the operating principle with the minimum loss during the transformer＇s operation, the operation modes of the two different trans- formers were given and the mathematical model was established. The formula was derived to calculate the critical load S＇, and the critical load S″was solved through the optimization method. The method was proposed to determine the economic operation zone according to the S′and S″. When the two dif- ferent transformers running at the same time, based on the principle that the loss reduction effect should be the most obvious, the formula was derived for the optimal load distribution between the two different transformers. Through the calculation and analysis of the real example, the proposed method provid- ed the theory basis for the economic operation of the two distribution transformers with different capacity, and facilitated to determine the load of each transformer burdened.