黑启动初始阶段，小系统空载运行的情况下，由于逆功率保护而往往发生机组并车失败问题。
When a small system is in on-load operation in the early stage of black start, unit paralleling may fail due to reverse power protection.
如果一台发电机组没有运转，并且没有逆功率继电器保护，运转的机组就会驱动这个机组，这台机组上的发电机则变成电动机运行。
If one set stops and reverse power protection is not provided, the set still running will drive the set that has stopped. The generator on the set that has stopped will act as a motor.
电源还设置了软起动及过流保护电路，以防逆变功率开关管的损坏。
The source is put up the circuits with the soft start and overcurrent protection to prevent the switching-transistor from breakdowning.
本文采用UC 3846作为PWM发生器，桥式驱动的脉冲变压器既保证信号的传输，又保证足够功率驱动全桥逆变主电路。对于经常发生短路刷镀刷镀工艺，快速过电流保护非常必要。
UC3846 is used for PWM, pulse transformer driven by bridge can transfer signal and power for IGBT in main circuit, quick protection is necessary for short circuit often happen during brush plate.
本文采用UC 3846作为PWM发生器，桥式驱动的脉冲变压器既保证信号的传输，又保证足够功率驱动全桥逆变主电路。对于经常发生短路刷镀刷镀工艺，快速过电流保护非常必要。
UC3846 is used for PWM, pulse transformer driven by bridge can transfer signal and power for IGBT in main circuit, quick protection is necessary for short circuit often happen during brush plate.
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