Electricity: power supply or regulation systems – For reactive power control – Using impedance
Patent
1980-04-07
1982-11-16
Shoop, William M.
Electricity: power supply or regulation systems
For reactive power control
Using impedance
G05F 170, H02J 318
Patent
active
043596789
ABSTRACT:
An electronic reactive power regulator is provided for controlling the number of power factor correction capacitors or reactors connected to an electrical power network. A multiplier circuit measures the reactive power in the power network by receiving two input signals which vary in phase angle and amplitude to indicate the amount of reactive power. The multiplier outputs a signal whose DC component indicates the amount of reactive power. This DC component is compared to upper and lower reference limits, and if either of said limits is exceeded, one of two control signals triggers a logic circuit to selectively connect or disconnect the lowest value correction capacitor to the electrical network which is not already connected or disconnected.
REFERENCES:
patent: 2460467 (1949-02-01), Nelson et al.
patent: 3185811 (1965-05-01), Kasper et al.
patent: 3300712 (1967-01-01), Segsworth
patent: 3391329 (1968-07-01), Meyer
patent: 3424971 (1969-01-01), Stackegard
patent: 3921070 (1975-11-01), Ringstad et al.
Kaskinen Pellervo
Raivola Pertti
Wikstroom Bo
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