Peak load control energy saving and cycling system

• US 3,987,308 A
• Filed: 06/16/1975
• Issued: 10/19/1976
• Est. Priority Date: 06/16/1975
• Status: Expired due to Term

• Current Assignee: Controlled Energy Systems Company
• Original Assignee: Controlled Energy Systems Company
• Inventors: Burch, John
• Primary Examiner(s): Hohauser, Herman J.
• Application Number:
  US05/586,965
• Time in Patent Office: 491 Days
• Field of Search: 307/41, 307/38, 307/39, 307/52, 307/57, 307/85, 307/86, 307/87, 235/151.21
• US Class Current: 307/41
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

Control system for limiting peak load demand and/or saving electrical energy by cycling the individual loads within an electrical distribution system. Electrical power usage in a distribution system is continuously monitored and compared to a pre-set limit. Loads can be added and cycled according to a limit set by the operator. Loads can also be dropped in response to a signal proportional to the electrical power usage in a distribution system within limits defined by the operator.

Claims

1. Load control and cycling system for limiting peak electrical load demands and for conserving electrical energy consumption in a multiple load local distribution system, comprising:

a. means for generating a signal to change the number of loads being energized by said control system,

b. a control means responsive to signals from said means for generating a signal which commands and enables loads to become energized, de-energized or not changed, and which includes means for producing signal pulses at predetermined intervals,

c. means responsive to output signal pulses from said control means for periodically cycling the preselected number of energized loads through the total number of controlled loads in said distribution system, and

d. circuit means operatively connected to said control means including at least one of the switches consisting of (1) a first switch means for selecting the minimum number of loads to be off at any one time and (2) a second switch means for selecting the maximum number of loads to be off at any one time, such that said circuit is able to prevent said control means from adding or dropping loads beyond the maximum and minimum numbers of off loads selected by either of said first and second switches.

2. The load control and cycling system according to claim 1 and in which said circuit means includes both of said first and second switch means.

3. The load control and cycling system according to claim 1 and in which said first and second switch means are manually operable for selection of minimum and maximum number of loads to be off.

4. The load control and cycling system according to claim 1 and in which at least one of said first and second switch means is condition responsive to automatically select the minimum or maximum number of loads to be off.

5. The load control and cycling system according to claim 1 and in which said circuit means includes a gating circuit connected to said means for generating a signal and which gating circuit receives signals from said first and second switch means according to preselected settings thereof to permit or inhibit the control means from changing the number of loads.

6. A load control and cycling system for limiting peak electrical load demands and for conserving electrical energy consumption in a multiple load local distribution system, comprising:

a. a decision circuit for generating a signal to add, drop or make no change in the number of loads being energized by said control system.

b. a control circuit responsive to signals from said decision circuit which commands and enables loads to become energized, de-energized or not changed and which includes means for producing signal pulses at predetermined intervals, said control circuit including;

1. first circuit means for converting said signals to add, drop, or not change loads into binary code output,

2. second circuit means for decoding said binary code output from said first circuit means and outputing signals to indicate the number of loads to be energized,

3. third circuit means for enabling the number of loads to become energized which are commanded by the signals from said second circuit means,

4. fourth circuit means responsive to output signals from said third circuit means for periodically cycling the permitted number of energized loads through the total number of controlled loads in said distribution system, and

c. disabling circuit means interconnecting said third circuit means and said first circuit means including at least one of the switches consisting of (1) a first switch for selecting the minimum number of loads to be off at any one time and (2) a second switch means for selecting the maximum number of loads to be off at any one time, such that said disabling circuit is able to prevent said control circuit from adding or dropping loads beyond the minimum and maximum numbers of off loads selected by said first and second switches.

7. The load control and cycling system according to claim 6 and in which said disabling circuit means includes both of said first and second switch means.

8. The load control and cycling system according to claim 6 and in which said first and second switch means are manually operated for selection of minimum and maximum number of loads to be off.

9. The load control and cycling system according to claim 6 and in which at least one of said first and second switch means is condition responsive to automatically select the minimum or maximum number of loads to be off.

10. The load control and cycling system according to claim 6 and in which said disabling circuit means includes a gating circuit connected to said decision circuit and which gating circuit receives signals from said first or second switch means according to preselected settings thereof to permit or inhibit the control circuit from changing the number of loads.