Devices and methods for decentralized power loss reduction control

• US 9,570,909 B2
• Filed: 07/26/2011
• Issued: 02/14/2017
• Est. Priority Date: 07/26/2011
• Status: Active Grant

• Current Assignee: GE Digital Holdings LLC (GE Aerospace)
• Original Assignee: General Electric Company
• Inventors: Milosevic, Borka, Toit, Willem Hendrik Du, Vukojevic, Aleksandar
• Primary Examiner(s): Ali, Mohammad
• Assistant Examiner(s): Saavedra, Emilio J
• Application Number:
  US13/191,409
• Publication Number:
  US 20130030579A1
• Time in Patent Office: 2,030 Days
• Field of Search: 700/286, 700/298, 703/18
• US Class Current: 1/1
• CPC Class Codes: H02J 2310/58 The condition being electrical
• CPC Class Codes: H02J 3/144 Demand-response operation of the power transmission or distribution network
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

Devices and methods for the decentralized, coordinated control of the active power losses of an electrical distribution system are provided. For example, a controller may include a network interface and data processing circuitry. The network interface may receive first measurements associated with a segment of an electrical distribution system and transmit a control signal configured to control equipment of the segment of the electrical distribution system. The data processing circuitry may run digital simulations of the segment of the electrical distribution system in various equipment configurations, selecting from among the various equipment configurations an equipment configuration that is expected to cause the active power losses of the segment to approach a desired value. The data processing circuitry then may generate the control signal, which may cause the equipment of the segment of the electrical distribution system to conform to the equipment configuration.

Claims

1. A method for controlling an electrical distribution system, the electrical distribution system comprising a first segment supplied by a first substation and a second segment supplied by a second substation, the method comprising:

when a fault occurs at the second substation and the second substation is disconnected from the second segment by opening a second switch device, connecting the first segment and the second segment by closing a first switch device there between thereby supplying power from the first segment to the second segment, simultaneously performing;

by a second controller associated with the second substation, an active power loss reduction optimization of the second segment and by a first controller associated with the first substation, a voltage violation check on the first segment to determine a voltage deviation of the first segment;

sending an indicator by the second controller to the first controller regarding a status of the active power loss reduction optimization of the second segment,

providing, by the second controller to the first controller, data representing a minimum voltage associated with the second segment while completing the active power loss reduction optimization of the second segment;

and

performing, by the first controller, upon receiving from the second controller the indicator, wherein the status indicates completion of the active power loss reduction optimization on the second segment by the second controller, an active power loss reduction optimization on the first segment.

2. The method of claim 1, wherein the minimum voltage associated with the second segment is provided by the second controller to the first controller, at least one of:

while the first controller is running the voltage violation check on the first segment;

or

while the first controller is running a voltage control on the first segment.

3. The method of claim 1, comprising:

communicating, from the second controller to the first controller, the indicator regarding completion of the active power loss reduction optimization on the second segment; and

communicating from the first controller to the second controller an indication of completion of the active power loss reduction optimization on the first segment.

4. The method of claim 1, comprising, while the first controller is performing the active power loss reduction optimization on the first segment, running a voltage violation check on the second segment using the second controller.

5. An article of manufacture comprising:

one or more tangible, non-transitory machine-readable storage media having instructions encoded thereon for execution by a processor of a first controller, the instructions configured to control active power losses of a first feeder supplied by a first substation of an electrical distribution system without controlling a second feeder supplied by a second substation of the electrical distribution system that is configured to be controlled by a second controller, the instructions comprising;

instructions to receive measurements associated with the first feeder and the second feeder of the electrical distribution system to the first controller and the second controller, respectively;

instructions to supply power front the first feeder to the second feeder via a switch device therebetween, when a fault occurs at the second substation,

instructions to simulate a distribution power flow on the first feeder and the second feeder according to various capacitor switching solutions of at least one capacitor of the first feeder using the measurements;

instructions to simultaneously perform an active power loss reduction optimization on the second feeder by the second controller while performing voltage violation check on the first feeder by the first controller;

instructions to send, by the second controller to the first controller;

an indicator regarding a status of the active power loss reduction optimization of the second feeder to the first controller, and

data representing a minimum voltage associated with the second feeder while completing the active power loss reduction optimization of the second feeder;

instructions to perform, by the first controller, upon receiving from the second controller the indicator, wherein the status indicates completion of the active power loss reduction optimization of the second feeder, an active power loss reduction control operation on the first feeder;

instructions to select a non-dominated capacitor switching solution from among the various capacitor switching solutions in which a reduction in power losses most closely approaches a desired value based on the active power loss reduction optimization performed on the first segment; and

instructions to control capacitors of the first feeder according to the selected non-dominated capacitor switching solution but not control any equipment of the second feeder.

6. The article of manufacture of claim 5, wherein the instructions to simulate a distribution power flow on the first feeder comprise instructions to simulate an effect of distributed generation on the first feeder.