Mell Why do we need parallel operation of DC generator?
Advantages of Parallel Operation of DC Generators Cost Effectiveness:- Electric power cost reduces when generator produce electricity according to their capacity and easily manage demand and supply requirement. Smooth Supply of Power:- In case of breakdown of generator, the supply of power will not get disrupted.
What are the condition of parallel operation of DC generator?
What are the conditions to be satisfied for parallel operation of DC generators? The polarities of the generators must be same or the connections must be interchanged till they become same. The voltages of both the generators must be equal. The change of voltage with change of load should be of same character.
What happens if generators are not synchronized?
Poor synchronizing can: Damage the generator and the prime mover because of mechanical stresses caused by rapid acceleration or deceleration, bringing the rotating masses into synchronism (exactly matched speed and rotor angle) with the power system.
What happens if same polarity is not maintained in parallel operation?
Same Polarity If they are connected with incorrect polarities then the two emfs, induced in the secondary windings which are in parallel, will act together in the local secondary circuit and produce a short circuit.
Why do we need to synchronize two generators?
The need for synchronization arises when two or more alternators work together to supply the power to the load. Since electrical loads do not remain constant, the two or more generators supplying the power need to be interconnected and operate in parallel to handle larger loads.
Is parallel positive to positive?
Parallel is exactly the opposite, with positive connections going to positive terminals, and visa versa.
How is the parallel operation of a DC generator done?
The excitation of the generator 2 is increased with the help of field rheostat till it generates voltage equal to the voltage of bus-bars. The main switch S 2 is then closed and the generator 2 is ready to be paralleled with existing generator.
Are there any problems with paralleling two generators?
But you will not get 100% output and the procedure is very difficult and any mistake can damage the generators. The main problem is that the waveforms of both non-inverter generators might not be in sync when you parallel both generators so as a result, the connected generator will overload.
What happens when more than one generator is not working?
Many generators in a system enhance consistency of the system, in certain cases, if one generator is not working then there will be no effect on the total load, that can occur in case of the single generator. If more than one generators are working in the system and we have to repair someone from the system, we can easily remove it and can repair.
How are generators and synchronous motors connected parallel?
They are connected parallel by means of transformer and transmission lines. Under normal operating conditions all the generators and synchronous motors in an interconnected system operate in synchronism with each other.