04345162 is referenced by 121 patents and cites 8 patents.

The present invention contemplates a method and apparatus for load-shedding duty cycling which overrides the normal thermostat control in a space conditioning system, upon receipt of an external signal as from the power company, in a manner such that the consumed power does not rise above the level that persisted just prior to the initialization signal. The present invention monitors the thermostat-controlled cycling pattern of a space conditioning system such as an air conditioner. Normally, the last thermostat-controlled cycle is then caused to become the reference or control cycle for the load shedding interval. That is, the ON portion of the reference cycle is caused to become the maximum allowable ON interval and the OFF portion of the reference cycle is caused to become the minimum OFF interval for the entire load shedding interval.

The device may be started by a single radio command or other means. The release from load control may be automatically timed or based on other signals. A radio receiver or other such means is provided to receive the signal from the power utility company which starts the load control function.

Unique features are also provided to prevent the undesirable effects of tampering with the thermostat setpoint just prior to the load shedding interval or to compensate for any cycle pattern of unusually long duration. This is done by compensating for the effect of these events by modifying the reference or control cycle when the appear.

Title
Method and apparatus for power load shedding
Application Number
6/164711
Publication Number
4345162
Application Date
June 30, 1980
Publication Date
August 17, 1982
Inventor
Thomas J Olson
Richfield
MN, US
Jeffrey M Hammer
St. Louis Park
MN, US
Agent
Charles G Mersereau
Assignee
Honeywell
MN, US
IPC
H02J 13/00
View Original Source