[특허]System for controlling power distribution to customer loads

[미국특허] System for controlling power distribution to customer loads 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-009/00 H02J-003/10
출원번호	US-0053718 (1979-07-02)
발명자 / 주소	Gurr George P. (Dunwoody GA)
출원인 / 주소	Sangamo Weston, Inc. (Norcross GA 02)
인용정보	피인용 횟수 : 87 인용 특허 : 6

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-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 ▼

A system for permitting an electric power utility to control the distribution of its power along its power lines from a substation to a plurality of customer loads, which comprises: a master control station including first programmable digital data processor means and input/output devices under the control of an operator for generating master control signals; at least one substation injection unit located at said substation in communication with said master control station and operating under the control of 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 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; and wherein said means for controlling the output of said frequency converting means comprises: means for controlling the firing time of said solid state devices in said three-phase rectifier means to select one of a plurality of output voltage levels as said predetermined level; and means for controlling the firing time and sequence of said solid state devices in said three-phase inverter means to establish an idle mode and an inject mode for said inverter means, said idle mode corresponding to the absence of a pulse in said pulse code signals, and said inject mode corresponding to the presence of a pulse in said pulse code signals at said preselected frequency; and wherein said means for controlling the firing time of said solid state devices in said three-phase rectifier means includes: means for receiving the three-phase voltage waveforms from said power line; means for determining when each of said voltage waveforms is greater than the other two waveforms and for providing output signals thereupon; and means responsive to said output signals of said determining means for turning on and off the gates of said solid state devices in said rectifier means.

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[미국특허] System for controlling power distribution to customer loads 원문보기

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[미국특허] System for controlling power distribution to customer loads 원문보기

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