消除过电压主要通过设置变频器的减速时间、能量消耗、回馈电网制动以及共用直流母线吸收再生能量几种方法消除。
The ways of cancelling over voltage are setting up deceleration time, consumption of energy, feedback electric network brake and Shared direct current bus bar soaking regenerated energy.
特高压直流输电技术可以帮助更加高效地利用可再生能源、降低对化石能源的依赖，同时降低二氧化碳排放。
UHVDC technology enables more efficient use of renewable energy sources, reduces dependency on fossil fuels and helps cut carbon dioxide emissions.
电流型四象限变流器是一种脉冲宽度调制的交直流变换装置，具有功率因数高、谐波电流小、再生方便等优点。
Currcnt-type four quadrant converter is an AC-DC converting device with pulse width modulation, whose advantages are high power factor, low harmonic current and convenient regeneration etc.
可以预计，随着可再生能源日益成规模地接5入电网，未来电网将实现从交流运行模式向直流运行模式的转变。
It can be predicted that, as the renewable energies increasingly connect into the power grids, the future power grids will shift from AC to DC.
讨论具有大惯量飞轮负载的直流无刷、定于无铁芯电机，在脉宽调制调幅有源控制的基础上，完成再生能耗制动控制以及低速下转换到有源制动控制的主要技术问题。
The braking mode control of reviving power-consumption of large momentum fly-wheel motor is discussed on the basis of pulse-modulated amplitude-modulation in this paper.
讨论具有大惯量飞轮负载的直流无刷、定于无铁芯电机，在脉宽调制调幅有源控制的基础上，完成再生能耗制动控制以及低速下转换到有源制动控制的主要技术问题。
The braking mode control of reviving power-consumption of large momentum fly-wheel motor is discussed on the basis of pulse-modulated amplitude-modulation in this paper.
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