Common automatic devices in power system are:
1, generator automatic excitation-automatic adjustment excitation. In order to realize energy conversion, synchronous generator needs a DC magnetic field to generate DC current of the magnetic field, which is called generator excitation current. According to the supply mode of excitation current, all generators that get excitation current from other power sources are called separately excited generators, and generators that get excitation power from generators themselves are called self-excited generators.
2. Automatic switching of power supply (BZT)- automatic switching of standby power supply. Automatic standby switching is the abbreviation of automatic standby power supply device, and emergency lighting system is a power supply system with automatic standby switching function. Automatic backup power supply devices usually use relay contactors as the control of automatic backup of batteries. When the main power supply fails, the control contact of the relay contactor control system is automatically closed and the battery is automatically connected to the emergency lighting circuit;
3, automatic reclosing-automatically determine the nature of the fault, automatic closing. The automatic reclosing device is an automatic device that automatically switches on the circuit breaker after the circuit breaker trips due to a fault.
4. Automatic quasi-synchronization-automatic adjustment to realize quasi-synchronization. Automatic quasi-synchronization is based on the principle of frequency difference check, pressure difference check and constant lead time, and is synthesized by time program and logic circuit according to certain control strategy, which can successfully complete the basic requirements of quasi-synchronization juxtaposition. Ass; Abbreviation;
5, automatic meter reading, automatic alarm, automatic switch, automatic opening, automatic ignition, automatic protection, automatic fire extinguishing and so on.