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Q. Describe about transmission-line voltage regulation?
The transmission-line voltage regulation (TLVR) is the ratio of the per-phase voltage drop between the sending-end and receiving-end buses to the receiving-end per-phase voltage (or nominal system per-phase voltage). It can also be expressed as
where subscript R denotes receiving end, NL indicates no-load, and FL stands for full-load. The TLVR for our example can be seen to be 12.8% prior to power factor improvement, and 10.2% after power factor improvement.
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