Conversely, step-down ratio insufficiency is compensated for by making the switching frequency during the step-down operation lower than the switching frequency during the step-up operation.
反之，通过根据升压时的开关频率来降低降压时的开关频率，可弥补 降压比的不足部分。
Theses switchgear assembly can greatly improve the operation reliability of power grid, gradually lower down the life cycle cost, step up the labor efficiency of power supply enterprise.
这些开关装置可以大幅度提高电网的运行可靠性，逐步减低设备的寿命周期成本，提升供电企业的劳动效率。
The cost gap is day by day serious, also gave the extraction unit management and operation to bring the difficulty and the pressure, also slowed down the oil gas development step.
成本缺口日益严重，既给采油单位经营管理带来了困难和压力，也减缓了油气开发的步伐。
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