Generator
A generator converts mechanical energy into electrical energy by electromagnetic induction. In an industrial generating set, a diesel or gas engine drives a synchronous alternator whose rotating magnetic field induces AC voltage in the stator windings; an automatic voltage regulator (AVR) controls excitation and a governor holds engine speed, and therefore frequency, at 50 Hz or 60 Hz. Generating sets supply prime, continuous or standby power for sites without grid supply, critical facilities, drilling operations and construction. ISO 8528 defines generating set power ratings (ESP, PRP, LTP, COP) and performance classes, and alternators are commonly built to IEC 60034. Selection parameters include rated output in kVA and kW at a stated power factor, commonly 0.8, voltage, frequency, duty rating, fuel type and consumption, step-load acceptance, enclosure and sound level, and derating for ambient temperature and altitude.
Examples
- Diesel standby generator set for a hospital or data centre
- Gas-engine generator for continuous power at a remote site
- Containerised generator set powering a drilling rig