Quiz – Substation Engineering

Phasors rotate clockwise and counter clockwise. Add the phase shifts due to transformer winding connections. How do you parallel or synchronize two separate system with these variations? Go through this quiz to learn phasing concept.

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Quiz - Substation Engineering 1

Transformer phasing quiz

Think you have this covered? This should be a piece of cake.

Does this nameplate convey which way the vectors rotate A-B-C or C-B-A?

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Which way are the vectors rotating in 1 and 2?

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It is time to replace a transformer. The old transformer's phase shift is shown in the image. The new one has Dyn1 or Dab 30degree shift.

If you were to parallel this new transformer with other existing transformers (all with Dyn1 or Dab phase shift), how would you land the phase conductors on the bushings? (Hint: use the infographic in the article)

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Consider this scenario, if the new transformer has Dyn11 or Dac phase shift, how would you land the phases now?

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Your score is

The average score is 55%

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Different pieces of equipment makeup a substation. Some of them are obvious, like a breaker and a transformer. With this quiz, dive a little deeper to understand some of the intricacies with equipment application.

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Quiz - Substation Engineering 2

Substation Major Equipment

It's only stupid-simple, let's begin.

What's the purpose of a conventional power transformer?
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An industrial facility is plagued with voltage flicker (due to harmonics) and poor power factor at the service entrance. Which device would you install to fix both issues?
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A transformer develops an internal fault. Which device would you install on the transformer high-side to interrupt fault current?
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In a distribution substation, the available ground-fault current on the low side of the step-down transformer is excessive, over-dutying the switching equipment. What is your cost-effective solution to reducing the fault current?
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You are building an interconnect station, tying wind farm generation to the power grid. At the substation, the sources are tied through a tie-breaker. Which device would you install to make sure the sources are synchronized?
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For which event should a surge arrester operate? Check all that apply.
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Which combination of devices would you use to implement power line carrier?
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Your score is

The average score is 45%

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Transmitting a direct transfer trip signal depends on certain requirements, for instance substation layout, location of fault, etc. Learn when to initiate a DTT and when not to, take the quiz.

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Quiz - Substation Engineering 3

Direct Transfer Trip Quiz

Get ready to learn this topic like never before.

For a temporary fault on the transmission line, would you transmit DTT from either one substation?

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For a transformer fault at substation 2, would you transmit DTT to substation 1?

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For what kind of fault at Substation 1 would you transmit a DTT to Substation 2 (to trip breaker 2CB1)?

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For a fault on Bus 1, would you implement a direct transfer trip (pilot) scheme to trip breakers tied to the same bus?

 

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Assume circuit breaker 3CB2 fails at substation 3. DTT is transmitted to Substation 2 to trip 2CB1 and 2CB3. Which auxiliary relay would you install at Substation 2 to trip breakers 2CB1 and 2CB3?

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Your score is

The average score is 49%

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