Abstract: : the substation is in power system voltage conversion, accept and electric power distribution, control and adjustment to the current voltage power facilities.

摘要：变电站是电力系统中转换电压、接受和分配电能、控制电流走向和调整电压的电力设施。

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The control and protection switching electric appliance (CPS) is a sort of New-style multifunction and integration component design to low-voltage distribution and control system.

控制与保护开关电器(CPS)是一种新型的用于低压配电与控制系统的多功能、一体化基础元件。

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The voltage is changed by varying trigger angle of the rectifier , pulse distribution implemented by software, and all control conducted on computer TP 801 so as to fully digitalize the whole system.

随后采用可控硅整流加滤波的电路对步进电机供电，用改变可控硅触发角的大小来改变供电电压，并用软件实现步进步机的脉冲分配，全部控制用单板机来实现，使整个系统完全数字化。

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