Method and apparatus for load reduction in an electric power system

• US 7,424,343 B2
• Filed: 08/11/2004
• Issued: 09/09/2008
• Est. Priority Date: 08/11/2004
• Status: Active Grant

• Current Assignee: Copeland Corporation LLC (Emerson Electric Company)
• Original Assignee: Lawrence Kates
• Inventors: Kates, Lawrence
• Primary Examiner(s): Picard, Leo
• Assistant Examiner(s): KASENGE, CHARLES R
• Application Number:
  US10/916,223
• Publication Number:
  US 20060036349A1
• Time in Patent Office: 1,490 Days
• Field of Search: 700/276, 700/286, 700/291, 700/295, 700/299, 700/300, 700/292, 621/26, 621/29, 621/81, 621/83, 621/84, 622/08, 621/49, 622/281, 622/283, 622/885, 236/91.D, 236/91.C, 236/91.E, 236/91.F
• US Class Current: 700/276
• CPC Class Codes: F25B 2600/07 Remote controls
• CPC Class Codes: F25B 2700/1351 of the cooled fluid upstream or downstream of the evaporator
• CPC Class Codes: F25B 2700/15 Power, e.g. by voltage or current
• CPC Class Codes: F25B 49/005 of safety devices F25B49/02 and F25B49/04 take precedence

Abstract

A system for load control in an electrical power system is described, wherein one or more data interface devices are provided to a cooling system. The data interface devices are configured to receive commands for controlling the cooling system. A remote monitoring system, such as a monitoring system operated by a power company or a power transmission company sends one or more commands to the data interfaced devices to adjust loading on the electrical power system. In one embedment, the monitoring system sends shutdown commands. In one embedment, the monitoring system sends commands to tell a compressor in the cooling system to operate in a relatively low-speed mode. In one embedment, the monitoring system sends tell the compressor and/or the cooling system to operate in a relatively low-power mode. In one embodiment, the commands are time-limited, thereby allowing the cooling system to resume normal operation after a specified period of time. In one embodiment, the commands include query commands to cause the cooling system to report operating characteristics (e.g., efficiency, time of operation, etc.) back to the monitoring center.

Claims

1. A system for load control in an electrical power system, comprising:

a thermostat configured to control a cooling system;

a data interface device provided to said thermostat, said data interface device configured to receive commands, said data interface device addressable using an identification code, said data interface device comprising one or more sensors to measure one or more physical characteristics of operation of a refrigerant cycle in said cooling system and a processor configured to compute an operating efficiency of said refrigerant cycle of said cooling system at least in part using data from said one or more sensors, at least one of said sensors configured to measure a temperature of a refrigerant in said cooling system; and

a remote monitoring system, said remote monitoring system configured to send a first command to said data interfaced device to adjust loading on said electrical power system, said system configured to use said data from said one or more sensors to diagnose an anomalous operating condition of said refrigerant cycle system, wherein said anomalous operating condition comprises a refrigerant undercharge.

2. A system for load control in an electrical power system, comprising:

a thermostat configured to control a cooling system;

a data interface device provided to said thermostat, said data interface device configured to receive commands, said data interface device addressable using an identification code, said data interface device comprising one or more sensors to measure one or more physical characteristics of operation of a refrigerant cycle in said cooling system and a processor configured to compute an operating efficiency of said refrigerant cycle of said cooling system at least in part using data from said one or more sensors, at least one of said sensors configured to measure a temperature of a refrigerant in said cooling system; and

a remote monitoring system, said remote monitoring system configured to send a first command to said data interfaced device to adjust loading on said electrical power system, said system configured to use said data from said one or more sensors to diagnose an anomalous operating condition of said refrigerant cycle system, wherein said anomalous operating condition comprises a refrigerant overcharge.