从电工学基本原理出发，详细讨论了变压器有功功率差动保护原理如何实现的问题。
According to the principle of electrotechnics, how to carry out power differential theory of power transformer is discussed.
在差有功法的基础上，提出一种利用广义瞬时功率实现变压器保护的新原理。
On the basis of power differential method, a novel principle of transformer protection using generalized instantaneous power is presented.
变压器的空载试验中，由于功率因数低，空载电流不是正弦信号，高精度测量其有功功率具有一定的难度。
In the no-load test of transformer, because of the low power factor and non-sinusoid current waveform, the high precision measurement is difficult.
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.
该供电装置主要为三相变单相的变压器结构，附加有功率补偿元件。
The power supply device is mainly in a structure of a three-phase to single-phase transformer and is additionally provided with a power compensation element.
然后有功率晶体管2N3055数进行驱动线圈变压器变换电压给高上去交流220V50Hz的电力约100瓦不超过。
Then Have Power Transistor 2N3055 Numbers Perform To Drive Coil Transformer For Converter Voltage Give Tall Go Up 220V AC 50HZ At The Electric Power About 100 Watt Not Exceed.
然后有功率晶体管2N3055数进行驱动线圈变压器变换电压给高上去交流220V50Hz的电力约100瓦不超过。
Then Have Power Transistor 2N3055 Numbers Perform To Drive Coil Transformer For Converter Voltage Give Tall Go Up 220V AC 50HZ At The Electric Power About 100 Watt Not Exceed.
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