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Dynamic Demand is the name of a semi-passive technology to support demand response by adjusting the load demand on an electrical power grid. It is also the name of an independent not-for-profit organization in the UK supported by a charitable grant from the Esmée Fairbairn Foundation, dedicated to promoting this technology. The concept is that by monitoring the frequency of the power grid, as well as their own controls, intermittent domestic and industrial loads switch themselves on/off at optimal moments to balance the overall grid load with generation, reducing critical power mismatches.[1] As this switching would only advance or delay the appliance operating cycle by a few seconds, it would be unnoticeable to the end user. This is the foundation of dynamic demand control. In the United States, in 1982, a (now-lapsed) patent for this idea was issued to power systems engineer Fred Schweppe.[2] Other patents have been issued based on this idea.[3][4][5][6]
Dynamic demand is similar to demand response mechanisms to manage domestic and industrial consumption of electricity in response to supply conditions, for example, having electricity customers reduce their consumption at critical times or in response to prices.[7] The difference is that dynamic demand devices passively shut off when stress in the grid is sensed, whereas demand response mechanisms respond to transmitted requests to shut off,
- ^ "Dynamic Demand" (PDF). webarchive.nationalarchives.gov.uk. page 3: domestic and industrial. Archived (PDF) from the original on 2023-07-06. Retrieved 2023-07-06.
- ^ US patent 4317049, "Frequency adaptive, power-energy re-scheduler", issued 1982-02-23
- ^ US patent 7010363, "Electrical appliance energy consumption control methods and electrical energy consumption systems", issued 2006-03-07
- ^ US patent 7149605, "Electrical power distribution control methods, electrical energy demand monitoring methods, and power management devices", issued 2006-12-12
- ^ US patent 7420293, "Electrical appliance energy consumption control methods and electrical energy consumption systems", issued 2008-09-02
- ^ US patent 8073573, "Electric Power Distribution Control Methods, Electrical Energy Demand Monitoring Methods, and Power Management Devices", issued 2011-12-06
- ^ "11. Electrical energy tariff rating". Archived from the original on 2008-12-08. Retrieved 2016-01-24.