Continuous power supply control system and method

Details Continuous power supply control system and method Continuous power supply control system and method

2011-07-19

2011-07-19

Fureman, Jared J (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

Reexamination Certificate

active

07982338

ABSTRACT:
A control system and method of controlling an uninterruptible power supply (UPS) system prevents a load anomaly, such as transformer DC offset, resulting from a supply disruption, such as a voltage sag, by modifying the UPS supplied power curve. The UPS supplied power curve maintains a predetermined power for a predetermined duration to cause the UPS supplied power curve to depart from normal supply curve post sag detection. Following the predetermined duration, the UPS supplied power curve is conformed to the normal power supply curve until restoration of the source power supply or engagement of a secondary power source.

REFERENCES:
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patent: 2004/0064272 (2004-04-01), Ennis et al.
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patent: 2005/0012395 (2005-01-01), Eckroad et al.
Garcia et al., Time Domain Modeling and Analysis of a Coupled DVR-STATCOM (UPFC) System, Jun. 2002, 14th PSCC, Sevilla, Session 26, Paper 2, pp. 1-7.

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