Miscellaneous – Substation Design Calculations Transformer noise calculations Figure 24: The transformer core is made of laminated sheets of metal (to minimize eddy current loss). A downside to this is vibration induced by 60hertz alternating current. Noise is not only generated in core. The coil, mounting, housing, conduits, fans, pumps etc. all generate noise. Why […]
Civil / Structural – Substation Design Calculations Land survey and site grading analysis Figure 18: Drawing created based on a land survey. The lines on the contour indicate areas of the same altitude. Picture credit: Landmarksurveyors Figure 19: Substations where site grading played a significant role. Left image credit FE Penn power hoytdale substation. Right image credit: FE […]
Electrical – Substation Design Calculations Protection and control analysis Figure 4: Protective relays inside the control building. Some are capable of tripping the high voltage circuit breaker in the yard. Figure 5: Several factors are considered when picking a relay. Significant ones are listed here. Why conduct protection and control analysis? Power substations contain expensive […]
System Planning Short-circuit study Figure 1: Short circuit study – oneline depicting the flow of fault current. Arrows indicate the direction of the flow. Why conduct short-circuit study? Hundreds, if not thousands, of generators are tied to the power grid. Rotating loads like induction motors are integrated as well. When a short-circuit occurs – generators pump current […]
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