Title:
IMPROVEMENTS RELATING TO SIGNALLING IN ELECTRICITY DISTRIBUTION SYSTEMS
Kind Code:
A2
Abstract:
Abstract not available for EP0944945
Abstract of corresponding document: WO9821803
An electricity supply system in which a control organisation creates variations of the fundamental frequency of the supply in order to signal shedding or adding of loads, or to cause some other process or transmission of data. The loads are generally located at consumer premises and are able to be actuated in this fashion by prior agreement with the control organisation. Each consumer installs a frequency change decoder device to detect and interpret the signals above noise which is always present on the supply system. Each device may be installed as part of general purpose electricity metering equipment or as a separate item. The devices may also be used to detect uncontrolled frequency decays caused by a failure in the supply system and to shed loads appropriately.
Abstract of corresponding document: WO9821803
An electricity supply system in which a control organisation creates variations of the fundamental frequency of the supply in order to signal shedding or adding of loads, or to cause some other process or transmission of data. The loads are generally located at consumer premises and are able to be actuated in this fashion by prior agreement with the control organisation. Each consumer installs a frequency change decoder device to detect and interpret the signals above noise which is always present on the supply system. Each device may be installed as part of general purpose electricity metering equipment or as a separate item. The devices may also be used to detect uncontrolled frequency decays caused by a failure in the supply system and to shed loads appropriately.
Inventors:
Gowans, Dean Syme (NZ)
Yuill, Andrew (NZ)
Yuill, Andrew (NZ)
Application Number:
EP19970913551
Publication Date:
09/29/1999
Filing Date:
11/14/1997
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Export Citation:
Assignee:
BRIAN TOLLEY CORP LIMITED (NZ)
International Classes:
H02J13/00; H02J13/00; H02J3/12; H02J3/14; H02J3/24; H02J3/24; H04B3/54; H04B3/54; (IPC1-7): H02J4/00
European Classes:
H04B3/54
Foreign References:
| 4370563 | Method of and apparatus for load and/or load control signaling to customers in a power system | |||
| 4246492 | Method of and apparatus for load and/or load control signaling to customers in a power system | |||
| 4658238 | Method and apparatus for providing selectively variable modulation signal for a carrier wave | |||
| 4385241 | A.C. Electricity power supply system and methods of and apparatus for load control thereon |
Other References:
See also references of WO 9821803A2