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How to measure the internal resistance of a generator and how to calculate the three-phase unbalance

By.Johns 2024-08-09 12:21:01 Share on facebook Share on Google Share on Instagram Share on Pinterest Share on Twitter Share on Tumblr Share on WhatsApp Share on Telegram Share on Reddit Visit our Instagram

Introduction How to measure the internal resistance of a generator and how to calculate the three-phase unbalance after measurement. Experts, give me some advice! The DC resistance between the winding output terminals U and V, V and W, W and U is called terminal resis

How to measure the internal resistance of a generator and how to calculate the three-phase unbalance

The DC resistance between the winding output terminals U and V, V and W, W and U is called terminal resistance and is recorded as Ruv, Rvw and Rwu respectively. The DC end resistance of the winding can be measured by bridge method, microohmmeter method, DC voltmeter-ammeter method or other methods.

Based on the measured terminal resistance value, the resistance value of each phase is calculated as follows:

Let Rmed=(Ruv+Rvw+Rwu)/2< /p>< p>Yes Star connection winding:

Ru=Rmed-Rvw

Rv=Rmed-Rwu

Rw=Rmed-Ruv< /p>

For winding the delta connection:

Ru=Rvw*Rwu/(Rmed-Ruv)+Ruv-Rmed

Rv=Rwu*Ruv/ (Rmed-Rvw)+Rvw- Rmed

Rw=Ruv*Rvw/(Rmed-Rwu)+Rwu-Rmed

Among three-phase resistors, the maximum value minus the minimum value divided by the average value is the three-phase resistance.

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