IP Library Granted Patent US 7,365,444
Granted Patent B2
US 7,365,444 · App. 11/563,333 · Granted Apr 29, 2008

Active anti-islanding system and method

Assignee: Southern California Gas Company
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Quick Facts
Patent No.
US 7,365,444
App. No.
11/563,333
Granted
Apr 29, 2008
Kind
B2
Abstract

An engine control system suited for use with an engine that outputs electrical power to a local load and is electrically connected to an electrical grid. The engine generates power at a power output value and the load consumes power at a load value. The engine control system includes a sensor that measures an electrical parameter indicative of a difference between the power output value and the load value, and a master control system that varies the engine power output value to prevent the electrical parameter from reaching zero.

Claims (5)

1. An engine control system for avoiding an islanding condition, the engine control system configured to control an engine that generates power and is electrically connected to an electrical grid and a local load that consumes power, the engine control system comprising:

a sensor configured to transmit a signal indicative of the difference between the power generated by the engine and the power consumed by the load; and

a master control system configured to receive the signal and vary the power generated by the engine to maintain a difference between the power generated by the engine and the power consumed by the load.

2. The engine control system of claim 1 , wherein the absolute value of the difference between the power generated by the engine and the power consumed by the local load is greater than a predetermined value.

3. The engine control system of claim 2 , wherein the predetermined value is stored in the master control system by a user.

Assignments (5)
CHANGE OF ADDRESS Recorded Mar 1, 2024
From: FLEX LEASING POWER & SERVICE LLC
To: FLEX LEASING POWER & SERVICE LLC
Reel/Frame 066722/0945 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 18, 2023
From: FLEXENERGY ENERGY SYSTEMS, INC.
To: FLEX LEASING POWER & SERVICE LLC
Reel/Frame 064634/0761 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 18, 2014
From: SOUTHERN CALIFORNIA GAS COMPANY
To: FLEXENERGY ENERGY SYSTEMS, INC.
Reel/Frame 033132/0476 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 21, 2007
From: INGERSOLL-RAND ENERGY SYSTEMS CORPORATION
To: SOUTHERN CALIFORNIA GAS COMPANY
Reel/Frame 020279/0715 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 18, 2007
From: LAKOV, GERMAN; FINSTAD, RANDALL G.
To: INGERSOLL-RAND ENERGY SYSTEMS
Reel/Frame 018771/0438 →
Continuity (2)
Continuation 1079595300 · Mar 8, 2004
Related Publication 20070096471A1 · May 3, 2007