Table of Contents
Why is parallel operation of generator necessary?
Parallel generators provide the maximum output when the power demand peaks and minimum output when the load necessities are low. Hence, parallel generators increase the reliability of power systems and make them more efficient.
What is a synchronous generator How does it work?
In a synchronous generator, a DC current is applied to the rotor winding producing a rotor magnetic field. The rotor is then turned by external means producing a rotating magnetic field, which induces a 3-phase voltage within the stator winding. The rotor of a synchronous machine is a large electromagnet.
What happens if generator is 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.
How do you parallel a generator?
Paralleling Generators
- The rms line-line voltages must be equal.
- The phases must be sequenced in the same order (i.e. Phase A – Phase A; Phase B – Phase B; Phase C – Phase C)
- The phase angles must be equal.
- The no-load frequency of the oncoming generator must be slightly higher than the existing system frequency.
What is generator parallel operation?
Paralleling is the operation in which multiple power sources, usually two or more generators, are synchronized and then connected to a common bus.
Can you connect generators in parallel?
Generators designed to be paralleled are perfectly safe as long as you follow the manufacturer’s instructions, use the proper required cables, and ensure that the generators you are using to parallel are compatible with each other as determined by the manufacturer.
How are generators synchronized?
A Generator cannot deliver power to electric power system unless its voltage, frequency and other parameters are exactly matched with the network. Synchronization is accomplished by controlling the exciter current and the engine speed of the generator.
Why are AC generators connected in a parallel?
Several alternators can supply a bigger load than a single alternator.
How to parallel two generators?
Start the Prime mover of the alternator and bring it to its rated speed.
What is parallel operation of generators?
Parallel Operation of Generator Sets. Parallel Operation of Generators The easiest way to setup a parallel system is to use generators that are exactly alike, or at least have the same output rating and alternator pitch. Another flexible approach to backing up your power requirements is to have two or more generators of variable output.