saladhawks
Electrical
- Jun 4, 2004
- 86
I have read several articles attempting to explain voltage collapse in an electrical system, but most are at the graduate academic level with too much math for my taste. I know all about VARS (reactive power) being required to support Voltage, but I am still missing something.
I have attempted to look at voltage collapse as a similar event to connecting more Watt (real power) load than a generator can sufficiently support. In this case, the prime mover would be inadequate and the rotor would slow down. This would lead to a loss of rotor speed, which would coincidentally lead to a loss of generator frequency, with the generator eventually tripping out via an under frequency relay.
In the case when more VAR (reactive power) load is connected than a generator can sufficiently support, the generator exciter will continue to increase its output until it exceeds its thermal limit, with a over-excitation relay eventually tripping out the generator. Is this the point when the voltage actually collapses????
I have attempted to look at voltage collapse as a similar event to connecting more Watt (real power) load than a generator can sufficiently support. In this case, the prime mover would be inadequate and the rotor would slow down. This would lead to a loss of rotor speed, which would coincidentally lead to a loss of generator frequency, with the generator eventually tripping out via an under frequency relay.
In the case when more VAR (reactive power) load is connected than a generator can sufficiently support, the generator exciter will continue to increase its output until it exceeds its thermal limit, with a over-excitation relay eventually tripping out the generator. Is this the point when the voltage actually collapses????