Multi-machine systems Starrett Mini-Lecture #4. In multi-machine systems l No Equal Area Criterion l...
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Transcript of Multi-machine systems Starrett Mini-Lecture #4. In multi-machine systems l No Equal Area Criterion l...
![Page 1: Multi-machine systems Starrett Mini-Lecture #4. In multi-machine systems l No Equal Area Criterion l Visualize multiple springs & masses that are interconnected.](https://reader036.fdocuments.in/reader036/viewer/2022082818/56649ec55503460f94bd06d0/html5/thumbnails/1.jpg)
Multi-machine systems
Starrett Mini-Lecture #4
![Page 2: Multi-machine systems Starrett Mini-Lecture #4. In multi-machine systems l No Equal Area Criterion l Visualize multiple springs & masses that are interconnected.](https://reader036.fdocuments.in/reader036/viewer/2022082818/56649ec55503460f94bd06d0/html5/thumbnails/2.jpg)
In multi-machine systems
No Equal Area Criterion Visualize multiple springs & masses that are
interconnected by horizontal springs
![Page 3: Multi-machine systems Starrett Mini-Lecture #4. In multi-machine systems l No Equal Area Criterion l Visualize multiple springs & masses that are interconnected.](https://reader036.fdocuments.in/reader036/viewer/2022082818/56649ec55503460f94bd06d0/html5/thumbnails/3.jpg)
Multi-Machine Diagram
System of coupled, nonlinear differential equations
Block diagram
![Page 4: Multi-machine systems Starrett Mini-Lecture #4. In multi-machine systems l No Equal Area Criterion l Visualize multiple springs & masses that are interconnected.](https://reader036.fdocuments.in/reader036/viewer/2022082818/56649ec55503460f94bd06d0/html5/thumbnails/4.jpg)
Detailed generator models
Include affects of varying flux linkages, generator internal voltages, & the field voltage
More differential equations! More variable transformations (Parks) & circuit
equations
![Page 5: Multi-machine systems Starrett Mini-Lecture #4. In multi-machine systems l No Equal Area Criterion l Visualize multiple springs & masses that are interconnected.](https://reader036.fdocuments.in/reader036/viewer/2022082818/56649ec55503460f94bd06d0/html5/thumbnails/5.jpg)
Block diagrams
![Page 6: Multi-machine systems Starrett Mini-Lecture #4. In multi-machine systems l No Equal Area Criterion l Visualize multiple springs & masses that are interconnected.](https://reader036.fdocuments.in/reader036/viewer/2022082818/56649ec55503460f94bd06d0/html5/thumbnails/6.jpg)
NOTE: Before you can include models for excitation systems, you need to
include the detailed machine models!
![Page 7: Multi-machine systems Starrett Mini-Lecture #4. In multi-machine systems l No Equal Area Criterion l Visualize multiple springs & masses that are interconnected.](https://reader036.fdocuments.in/reader036/viewer/2022082818/56649ec55503460f94bd06d0/html5/thumbnails/7.jpg)
Excitation system
Modulates the field voltage of the synchronous machines
Supplies DC voltage DC Exc. = DC generator AC Exc. = AC generator (rectified) Static Exc. = stationary DC supply
![Page 8: Multi-machine systems Starrett Mini-Lecture #4. In multi-machine systems l No Equal Area Criterion l Visualize multiple springs & masses that are interconnected.](https://reader036.fdocuments.in/reader036/viewer/2022082818/56649ec55503460f94bd06d0/html5/thumbnails/8.jpg)
Elements of an excitation system (Kundur)
Exciter - DC power supply for field Regulator - amplifies, stabilizes exciter Voltage transducer & load compensator -
senses terminal voltage, remote Power system stabilizer - additional signal for
damping (speed, Pacc or f) Limiters and protection - limit voltages &
currents
![Page 9: Multi-machine systems Starrett Mini-Lecture #4. In multi-machine systems l No Equal Area Criterion l Visualize multiple springs & masses that are interconnected.](https://reader036.fdocuments.in/reader036/viewer/2022082818/56649ec55503460f94bd06d0/html5/thumbnails/9.jpg)
Excitation System Components
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How it all goes together