| SPEED/NIALMS
The Single Point End-use Energy Disaggregation (SPEED) meters and the Non-Intrusive Appliance Load Monitoring System (NIALMS) software package together constitute the SPEED/NIALMS whole-house electric load monitoring system. SPEED/NIALMS allows the collection of appliance specific load data without entering customer homes or installing meters on appliances. A SPEED meter can be installed behind the existing electric utility meter in about 20 minutes.
Once in place, the SPEED recorder collects data and then sends them remotely over telephone lines. The recorder samples the incoming current and voltage (including phases) 2,000 times per second. The SPEED meter identifies changes in load and records and stores the date and time of each change along with voltage, current, and real and reactive power. The NIALMS software and computer server receives the stored data from the SPEED meter when the recorder initiates a telephone call. The NIALMS software matches load characteristics to a library of appliance signatures to calculate the loads induced by the active appliances. After a study is completed, the SPEED meter can be removed and installed in another location as part of a new research effort. The prototype for SPEED/NIALMS, which was originally developed by the Massachusetts Institute of Technology in the 1980's, was field tested by the Electric Power Research Institute (EPRI) and seven utility partners in the mid-1990s. The EPRI report on this field test showed that NIALMS was 90-95% accurate for most appliances. The technology won the 1996 Utility Automation Innovation Award for Most Valuable Demand Side Management Product and the 1997 R&D Magazine R&D 100 Award, and is now sold by Enetics, Inc. of Victor, New York. ORNL's NIALMS computer set-up is located in a room designed for long-term use as a residential electric load analysis laboratory. ORNL's computing equipment is capable of receiving data remotely from up to 300 SPEED meters and of processing them into end-use specific descriptions of electric loads in each house being monitored. Contact: Lance
McCold |
