초록 ▼

A method and apparatus which permits a power utility to have direct control of customers loads (CD) with a view toward facilitating enablement of a load management philosophy which includes peak shaving and load deferral. A master control station (MCS), which comprises a programmable microprocessor-

A method and apparatus which permits a power utility to have direct control of customers loads (CD) with a view toward facilitating enablement of a load management philosophy which includes peak shaving and load deferral. A master control station (MCS), which comprises a programmable microprocessor-based central controller, is in two-way communication with a plurality of substation injection units (SIU), one of each of which is positioned at a separate substation of the power utility. Each substation injection unit (SIU), under the control of its own microprocessor, responds to master control signals from the master control station (MCS) to inject a pulse code signal onto the power lines of the utility. The system includes a plurality of remote receiver units (RRU) which are positioned at and connected to control the on and off times of customer loads (CD). Each remote receiver unit (RRU) is preset to respond to particular pulse code signals from the substation injection units (SIU) to carry out the desired command functions, which can be implemented either automatically or manually on a fixed or dynamic-cycle basis as the need arises. The system utilizes a command signal and pulse code signal verification technique to insure system integrity and reliability.

대표청구항 ▼

An electric power system for controlling the distribution of power along power lines from a substation to a plurality of loads, which comprises: a master control station including first programmable digital data processor means and input/output devices adapted to be controlled for generating master

An electric power system for controlling the distribution of power along power lines from a substation to a plurality of loads, which comprises: a master control station including first programmable digital data processor means and input/output devices adapted to be controlled for generating master control signals; at least one substation injection unit located at said substation in communication with said master control station and adapted for control by second programmable digital data processor means for injecting, in response to certain of said master control signals, pulse code signals onto said power lines; and a plurality of remote receiver units each adapted to be connected to a particular load device and to said power lines for receiving said pulse code signals, each of said remote receiver units responsive to one of said pulse code signals for connecting or disconnecting its load from said power lines; and wherein said substation injection unit further comprises: means for converting the frequency of a standard three-phase power line voltage signal generated by said utility at said substation to a preselected frequency desired for said pulse code signals; means responsive to said second data processor means for controlling the output of said frequency converting means to generate said pulse code signals; and means for injecting said pulse code signals onto said power lines for transmission to said remote receiver units; and wherein said frequency converting means comprises: three-phase rectifier means including a plurality of conduction controlled solid state devices under the control of said second data processor means for receiving said three-phase power line voltage signal and for developing a DC voltage signal of a predetermined level; and three-phase inverter means including a plurality of conduction controlled solid state devices under the control of said second data processor means for receiving said DC voltage signal from said rectifier means and for converting same to said pulse code signal at said preselected frequency.