Electricity: power supply or regulation systems – External or operator controlled – Using a transformer or inductor as the final control device
Patent
1994-09-07
1996-03-12
Wong, Peter S.
Electricity: power supply or regulation systems
External or operator controlled
Using a transformer or inductor as the final control device
323255, G05F 114
Patent
active
054989540
ABSTRACT:
The invention is a system and method for changing the tap position of transformers, where two or more of the transformers are operating in parallel, based on the measured low side bus voltage and low side MVAR flow. A programmable logic controller (PLC) calculates the average low side bus voltage for the transformers operating in parallel. The PLC also calculates a feedback voltage for each transformer as a function of circulating MVAR flow for each transformer operating in parallel based on concept of preventing the tap position of a transformer from exceeding a certain relative difference compared to other transformers.
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Bassett David L.
Weatherly Dan E.
Berhane Adolf
Pennsylvania Power & Light Company
Wong Peter S.
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