Richard A Krause

US Patent:

54225612, Jun 6, 1995

Filed:

Nov 23, 1992

Appl. No.:

7/980385

Inventors:

Bradley R. Williams - Orange CA
Richard C. Krause - Diamond Bar CA
Bryan H. Pham - Cyprus CA
Dennis A. Eastman - Yorba Linda CA

Assignee:

Southern California Edison Company - Rosemead CA

International Classification:

G05F 170

US Classification:

323209

Abstract:

Controlling a customer voltage and VAR flow in a power transmission and distribution system includes measuring first voltages in a power line directed to a first location related to customers. Both the customer voltage and the VAR flow for the network is determined in relation to the number of capacitors associated with the first location which are switched in or out of the network. The measured voltages are communicated to a voltage control. Voltage deviations of the measured first voltage are determined relative to a predetermined voltage range intended to be present at the first locations. Switching the capacitor means into or out of the network is determined by the voltage control in accordance with a voltage rise table. A VAR flow controller is responsive to the voltage at the first locations, the effect of the VAR generation by the capacitors and the change of VAR generation by the capacitor. A decrease in voltage at the customers saves energy use.