Method and apparatus for controlling electrical loads
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-013/00
출원번호
US-0587150
(1975-06-16)
발명자
/ 주소
Leyde Warren L. (Seattle WA) Marker Delbert E. (Issaquah WA)
출원인 / 주소
Pacific Technology, Inc. (Renton WA 02)
인용정보
피인용 횟수 :
38인용 특허 :
0
초록▼
In an electrical load control system, method and apparatus are provided for selectively, individually connecting and disconnecting a plurality of loads to and from a power source. The loads are selectively connected (added), disconnected (shed), and reconnected (restored or added), in a predetermine
In an electrical load control system, method and apparatus are provided for selectively, individually connecting and disconnecting a plurality of loads to and from a power source. The loads are selectively connected (added), disconnected (shed), and reconnected (restored or added), in a predetermined sequence, wherein the ranking of the loads in such sequence is selectively rotated in a manner which results in a sharing of on and off time and an equalizing of wear among all of the loads. As an example of this operation, a load control system is disclosed in which the consumption of electrical power is varied by periodically shedding and adding individual loads in order to maintain the level of power usage below predetermined limits and yet make full use of the available power within such limits. For this purpose, a load regulating circuit monitors the power consumption and issues either an add command signal causing one or more loads to be connected, or issues shed command signal causing one or more of the loads to be disconnected, that is, shed. To uniformly distribute the off time associated with shed loads among all the loads, a load switching circuit means and a load rotation circuit means are provided for rotating the order in which the loads are shed, and thereafter restored or added. The rotation takes two forms. First, the order or rank in which the plurality of loads are shed, is shifted or rotated after each occurrence of a condition in which all of the loads have been turned on. Secondly, when less than all of the loads are on, the on-off ranking or status of the loads, resulting from the preceding add or shed command, is periodically shifted or rotated among all of the loads, in order to share the available electrical power on a timed rotation basis. Thus, the disruption of load service due to the curtailed power, is time shared among all of the loads on an equal, non-priority basis.
대표청구항▼
In an electrical system including a load controller having a plurality of load controlling outputs each capable of assuming either a load-on condition or a load-off condition, said outputs being adapted for individually controlling the connections of a corresponding plurality of electrical loads to
In an electrical system including a load controller having a plurality of load controlling outputs each capable of assuming either a load-on condition or a load-off condition, said outputs being adapted for individually controlling the connections of a corresponding plurality of electrical loads to a power source, and a load regulating means connected to said controller for regulating the collective status of said load-on and load-off conditions at said outputs, said regulating means assuming an add mode when the number of said outputs that are in said load-on condition is to be increased and assuming a shed mode when the number of said outputs that are in said load-on condition is to be decreased, the improvement in said controller comprising: switching means connected to said outputs and having input means responsive to said regulating means for successively switching said outputs from said load-off conditions to said load-on conditions when the regulating means is in the add mode and for successively switching said oUtputs from said load-on conditions to said load-off conditions when said regulating means is in the shed mode, said switching means including means for establishing a plurality of different orders of succession in which said outputs are successively switched; rotation circuit means for changing said switching means from one of said orders of succession to another of said orders of succession; and, means for sensing a predetermined collective status of said conditions at said outputs, said rotation circuit means being operative in response to said means for sensing so as to change said switching means from one of said orders of succession to another of said orders of succession when said conditions at said outputs assume said predetermined collective status.
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