Delivery point voltage regulation in electric energy distributio

Electrical transmission or interconnection systems – Plural load circuit systems – Transformer connections

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323255, 323342, H02J 300

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active

054669731

ABSTRACT:
A method for regulating the voltage at which electric energy is supplied at the delivery points in a network for distributing electricity. The voltage of electric energy supplied through a high-voltage network is reduced to a voltage suitable for a medium-voltage network by means of at least one variable transformer. The voltage of the electric energy in the medium-voltage network is reduced, by means of at least one transformer, to a voltage suitable for a low-voltage network supplying the electric energy to the consumers. The adjustment of the variable transformer between a high-voltage network and a medium-voltage network is influenced by the actual voltage measured and the current or load at the output side of the variable transformer. The voltage prevailing at the delivery point is measured at the location of at least a number of consumers and the variable transformer is set partly in dependence on the voltage thus measured at the consumers' location.

REFERENCES:
patent: 4471231 (1984-09-01), Minimi
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Erickson, J. C. et al., "The Effects of Voltage Reduction on Distribution Circuit Loads. IEEE Transactions on Power Apparatus and System", vol. PAS-101, No. 7, Jul., 1982 pp. 2014-2018.
Kennedy, B. W. et al. "Conversation Voltage Reduction (CVR) at Snohomisch County PUD" IEEE Transactions on Power Systems, vol. 6, No. 3, Aug., 1991, pp. 986-998.
"Voltage Ratings for Electric Power Systems and Equipment (60 Hz), American National Standards Institute", New York, Standard No. C84.1-1989.
Clark, E. H. "Voltage Reduction for Energy Reduction", EEI T&D Committee Meeting, Portland, Oreg., May 17, 1979.
Pazuik, L. A., et al. "An Expert Microprocessor Controlled Voltage Regulator . . . " IEEE Transactions on Power Delivery, vol. 4, Oct. 1989, pp. 2222-2228.
Taylor, C. W. "Solving Bulk Transmission System . . . " Third International Symposium on Distribution Automation and Demand Side Management Conference Proceedings, Jan. 11-13, 1993, pp. 486-494.

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