1. Immediately switch the AVR to manual operation.
2. One-phase or two-phase false tripping of the main circuit of the generator-transformer unit causes the generator to run in non-full-phase operation. The active and reactive power of the generator should be immediately reduced to the state of two non-transmitting, and the load current should be limited within the allowable range.
3. Do not close the main steam valve of the turbine and disconnect the de-excitation switch before disconnecting the main switch of the generator.
4. The generator asymmetric overload protection action trip is handled as accident shutdown.
5. When paralleling or disconnecting, when the main switch of the generator is not fully closed or disconnected, the output of the generator should be quickly reduced to the state of two non-transmitting, and the main switch of the transformer group should be disconnected. If the main switch cannot be disconnected in three phases, it should be Quickly report to the middle transfer to perform the bus switch operation, and use the bus tie switch to disconnect the generator from the system.
6. After the generator is impacted by negative sequence current, its I2t is greater than the allowable value after analysis and calculation, and the rotor should be pulled out for detailed inspection.
Post time: Apr-27-2022