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The Water Cooler
General Discussion
Electricians or people that understand wiring, test me
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<blockquote data-quote="dennishoddy" data-source="post: 3291059" data-attributes="member: 5412"><p>By controlling generator speed. A 2 pole generator requires 3600 rpm to generate 60 hz. A 4 pole generator requires half that speed. </p><p>When your bringing a power plant generator online, the phases are matched through the control system and a synchroscope that tells the generator where the grid phase is. When they match, there are two options. The operator can manually sync the generator by throwing a switch at the right time that is critical, or allow the later model electronic control systems to do it electronically. </p><p>When I say critical, it's a breathtaking moment when syncing a 550 megawatt steam driven generator to the grid. If your 1/10 of a cycle off, some bad stuff is fixing to happen. Huge 200' long generators have screamed to a halt and actually spun backwards. Never saw that, but had industry reports with details.</p></blockquote><p></p>
[QUOTE="dennishoddy, post: 3291059, member: 5412"] By controlling generator speed. A 2 pole generator requires 3600 rpm to generate 60 hz. A 4 pole generator requires half that speed. When your bringing a power plant generator online, the phases are matched through the control system and a synchroscope that tells the generator where the grid phase is. When they match, there are two options. The operator can manually sync the generator by throwing a switch at the right time that is critical, or allow the later model electronic control systems to do it electronically. When I say critical, it's a breathtaking moment when syncing a 550 megawatt steam driven generator to the grid. If your 1/10 of a cycle off, some bad stuff is fixing to happen. Huge 200' long generators have screamed to a halt and actually spun backwards. Never saw that, but had industry reports with details. [/QUOTE]
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