Power distribution system control network

• US 5,517,423 A
• Filed: 01/11/1994
• Issued: 05/14/1996
• Est. Priority Date: 01/11/1994
• Status: Expired due to Fees

• Current Assignee: Imperial Bank (Imperial Bancorp)
• Original Assignee: Systems Analysis & Integration, Inc.
• Inventors: Pomatto, Lawrence A.
• Primary Examiner(s): Voeltz, Emanuel T.
• Assistant Examiner(s): Peeso, Thomas
• Application Number:
  US08/180,921
• Time in Patent Office: 854 Days
• Field of Search: 364/492, 340/825.15, 340/825.16, 323/209, 323/267, 323/271, 323/276, 307/64, 307/24, 307/38
• US Class Current: 700/286
• CPC Class Codes: H02J 13/00007 using the power network as support for the transmission
• CPC Class Codes: H02J 13/00017 using optical fiber
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/16 Electric power substations
• CPC Class Codes: Y04S 40/121 using the power network as support for the transmission
• CPC Class Codes: Y04S 40/124 using wired telecommunication networks or data transmission busses

Abstract

The power distribution control system of the present invention provides a distributed intelligence, data acquisition and control system which collects and analyzes large amounts of data representing power usage from a power distribution substation and remote control units spread throughout a power distribution network. The system also provides the capability of various control functions for the substation and remote locations such as capacitor banks and pole switches along a distribution line. The system provides communications capabilities between local devices and also with remote control units. The system provides real time monitoring of power usage and real time control of various functions in the power distribution network.

Claims

1. A control network for use in a power distribution system having, said power distribution system having power equipment distributed throughout said power distribution system, said control network comprising:

a first pole switch controller located at a first distribution pole in said power distribution system, said first pole switch controller detecting a phase between an A.C. voltage signal and an A.C. current signal in first power equipment associated with said first distribution pole to monitor the power equipment load; and

a second pole switch controller located at a second distribution pole in said power distribution system, said second pole switch controller responsive to signals from said first pole switch controller to open or close a switch at said second distribution pole.

2. A control network for use in a power distribution system having, said power distribution system having power equipment distributed throughout said power distribution system, said control network comprising:

a substation data acquisition controller located at a power substation within the power distribution system, said substation data acquisition controller monitoring a phase between an A.C. voltage signal and an A.C. current signal within power equipment at the substation; and

at least one capacitor controller located at a capacitor bank within the power distribution system, said capacitor controller in communication with and responsive to said substation data acquisition controller to control at least one capacitor in said capacitor bank.

3. A control network for use in a power distribution system having, said power distribution system having power equipment distributed throughout said power distribution system, said control network comprising:

a substation data acquisition controller located at a power substation within the power distribution system, said substation data acquisition controller monitoring a phase between an A.C. voltage signal and an A.C. current signal within power equipment at the substation; and

at least one pole switch controller located at a distribution pole within the power distribution system, said pole switch controller in communication with and responsive to said substation data acquisition controller to control at least one pole switch at said distribution pole.

4. A control network for use in a power distribution subsystem comprising:

a current and voltage waveform sensor which produce signals on an output replicative of a current waveform and a voltage waveform propagating within a power line of said power distribution subsystem;

at least one system controller for said power distribution subsystem;

a power supply which provides power to said at least one system controller independent of the flow of current in said power line; and

at least one data acquisition unit coupled to said power supply and comprising a controller having a plurality of inputs, said data acquisition unit distributed at a location in the power distribution network, said at least one data acquisition unit in communication with said system controller, said data acquisition unit coupled by at least one of said inputs to the output of said current and voltage waveform sensor to receive said signals replicative of said current and voltage waveforms from said waveform sensor to determine the phase between said current and voltage waveforms.

5. A control network for use in a power distribution subsystem comprising:

a current and voltage waveform sensor which produces signals on an output replicative of a current waveform and a voltage waveform propagating within a power line of said power distribution subsystem;

at least one system controller for said power distribution subsystem;

a power supply which provides power to said at least one system controller independent of the flow of current in said power line;

a communications network coupled to said system controller; and

at least one data acquisition unit coupled to said power supply and to said communications network and comprising a controller having a plurality of inputs, said at least one data acquisition unit in communication with said system controller via said network, said data acquisition unit coupled by at least one of said inputs to the output of said current and voltage waveform sensor to receive said signals replicative of said current and voltage waveforms from said waveform sensor to determine the phase between said current and voltage waveforms.

6. The monitoring network of claim 5, wherein said communications network comprises a multi-drop network.

7. A monitoring network for use in a power distribution system having one or more power distribution subsystems comprising:

a current and voltage waveform sensor which produce signals on an output replicative of a current waveform and a voltage waveform propagating within a power line in one of said power distribution subsystems;

at least one system controller for said power distribution subsystem; and

at least one data acquisition unit comprising a microcontroller having a plurality of inputs, said at least data acquisition unit in communication with said system controller to provide information to said system controller, said data acquisition unit coupled by at least one of said inputs to the output of said current and voltage waveform sensor to receive said signals replicative of said current and voltage waveforms from said waveform sensor to determine the phase between said current and voltage waveforms.

8. The control network of claim 7, wherein said at least one data acquisition controller has a plurality of control outputs.