Substation Design

Learn the details that go into designing a substation.

Practical Implementation of Transformer Winding Connections – 3 Critical Steps to Consider

Substation Design / By / January 10, 2022 / 7 minutes of reading

To understand how transformer winding connections are made, in this article I will build a three-phase transformer delta-delta (with 180degree phase-shift) using three (3) single-phase transformers. Although this exercise seems moot for substation design, practical applications of single-phase transformers exist. For instance, as a station-service source. Also, to guide you step-by-step, I’ve prepared the below …

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Transformer winding connections using single phase transformers

Cheatsheet for calculating lightning surge arrester ratings

Substation Design / By / September 17, 2021 / 5 minutes of reading

Are you sizing a lightning surge arrester for installation inside a substation? Electrical parameters: MCOV, TOV, and discharge voltage; should be on top of your list – for the correct application. If you are familiar with these parameters, then check out the below infographic, showing how to pick their values.

Transient Recovery Voltage and Its Effect on a Circuit Breaker

Substation Design / By / September 8, 2021 / 6 minutes of reading

One problem that is pervasive in the power grid and not well understood is called the Transient Recovery Voltage (TRV). When a short-circuit due to a fault in high voltage or medium voltage system is switched-out by a circuit breaker, the voltage across the breaker poles rapidly increases; as high as twice the operating voltage. …

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