合理选择变压器的容量可以降低变压器的有功功率损耗和无功功率损耗，提高电力系统运行的经济性。
Rational chosen transformer capacitor can cut active power loss and reactive power loss down. So, it can improve power system economical operation.
只有做到合理补偿无功功率，才能有效地维持和稳定系统电压水平，从而降低有功损耗，提高系统供电效率。
Compensating reactive power reasonably can keep system's stable voltage level effectively, so reduces the active loss, improves system's efficiency of power supply.
基于负荷和发电机的复功率在支路上引起的有功损耗分量，给出了负荷和发电机对元件使用份额的新定义。
Based on the branch active loss components incurred by individual loads and generators, a novel definition of the using portion of a power element by a particular load or generator is proposed.
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