06-10-2017, 04:04 PM
Today's complex energy scenario demands an uninterrupted supply for the consumer. Therefore the generator is the ultimate source of life today and its function is the heart of the energy system. Therefore, you need maximum protection against faults that occur. The generator used is a synchronous machine operable as a generator or motor, depending on the form of input power. These generators are synchronized with the bus bar which is the grid. These are the number of faults that can cause heavy damage to the generator and simultaneously to the economic situation.
A synchronous generator / alternator is expected to deliver active power to the system under normal operating conditions. If the turbine, ie the primary motor fails, the generator / alternator connected to the system will continue to function as a synchronous motor that will draw active power from the system. This reversal of the power flow due to the primary motor loss can be detected by the reverse power relay.
The consequences of the generator motor and the power level extracted from the power system will depend on the primary motor type, since under this condition the primary motor acts as a load for the synchronous motor. For steam turbines, the driving power is about 0.5-3% of the rated power of the generator. Under failure of the motive machine, due to the wind turbine loss motor will be more in the blades of the turbine, since there is no steam to cool it. Therefore, it will cause damage to the turbine.
A synchronous generator / alternator is expected to deliver active power to the system under normal operating conditions. If the turbine, ie the primary motor fails, the generator / alternator connected to the system will continue to function as a synchronous motor that will draw active power from the system. This reversal of the power flow due to the primary motor loss can be detected by the reverse power relay.
The consequences of the generator motor and the power level extracted from the power system will depend on the primary motor type, since under this condition the primary motor acts as a load for the synchronous motor. For steam turbines, the driving power is about 0.5-3% of the rated power of the generator. Under failure of the motive machine, due to the wind turbine loss motor will be more in the blades of the turbine, since there is no steam to cool it. Therefore, it will cause damage to the turbine.