It's significant to study the regulation of active power of three-phase synchronous generator by way of the alternating power source of three-phase industrial frequency.

三相同步发电机作为三相工业频率的交流电源，研究其有功功率调节具有重要意义。

youdao

Some cutting-edge photovoltaic cells offer an even higher initial efficiency but fall behind when the DC power they produce is converted to grid-ready alternating current.

一些先进的光伏电池甚至可以提供更高的效率，但是由于要把直流电源转化为交流电，转换效率有所降低。

youdao

The system generates a direct current, so using it to power DC devices locally is more efficient than switching to the alternating current needed to feed it back to the grid.

该系统产生的电流为直流电，所以用来驱动本地的直流点装置比将其转化为交流电输入电网来的更有效率。

youdao

Inverters and microinverters convert the direct current (DC) power produced by solar panels into alternating current (AC) used in homes and businesses.

FORBES: Solar Microinverter Maker Enphase Gets A Boost In Distribution Deal With Siemens

Yet it's scarcely visible in the market for solar panel inverters, devices that turn the direct current power generated by solar panels into alternating current for the grid.

FORBES: Magazine Article

Plug loads refer to electric power consumed by products through an ordinary alternating current plug socket.

FORBES: Energy Waste Rebounds: Top 10 Energy Pigs in the Plug