Electrical transmission or interconnection systems – Stabilized – anti-hunting or antioscillation systems
Reexamination Certificate
2008-05-15
2009-11-24
Riley, Shawn (Department: 2838)
Electrical transmission or interconnection systems
Stabilized, anti-hunting or antioscillation systems
C323S211000
Reexamination Certificate
active
07622826
ABSTRACT:
A flicker improvement effect evaluating system evaluates an effect of improvement of voltage flicker in a power system to which a static reactive power compensator is to be introduced. A system voltage operating unit operates a compensation current and a system impedance of the power system, based on actually measured data of system voltage and load current read from a data reading unit. Based on the results of operations and the actually measured data, a not-yet-improved system voltage at present and an improved system voltage attained when the static reactive power compensator is provided on a bus are simulated. By a flicker meter, flicker values of the not-yet-improved system voltage and improved system voltage amplified by an amplifying circuit are measured, and from the flicker values, the rate of improvement attained by the static reactive power compensator is operated.
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Hirofumi Akagi et al., “Generalized Theory of the Instantaneous reactive Power and its Application”, Journal B Institute of Electrical Engineers of Japan, 1983, pp. 483-490.
Buchanan & Ingersoll & Rooney PC
Mitsubishi Electric Corporation
Riley Shawn
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