SYSTEM AND METHOD TO MANAGE POWER USAGE

• US 20110182094A1
• Filed: 02/14/2011
• Published: 07/28/2011
• Est. Priority Date: 08/13/2007
• Status: Abandoned Application

• Current Assignee: Powerwise Group, Inc.
• Original Assignee: Powerwise Group, Inc.
• Inventors: Lumsden, John L., Zaga, Rafael E.
• Application Number:
  US13/026,931
• Publication Number:
  US 20110182094A1
• Time in Patent Office: Days
• US Class Current: 363/126
• CPC Class Codes: G01R 21/00 Arrangements for measuring electric power or power factor G01R7/12 takes precedence
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: H02J 1/14 Balancing the load in a network

Abstract

A system and method are provided for managing electrical power usage. During a predetermined time period, such as during blackout conditions, a digital signal processor (DSP) controls an IGBT/FET-based device to supply an allocated amount of power. When the consumed amount of power exceeds the allocated amount, the DSP shuts off the power. Alternatively, the system provides a signal to reduce the consumed power. If sufficient load has not been reduced after a predetermined amount of time, the power is shut off. Further alternatively or in addition, the DSP may shut off power to predetermined electrical outlets, while providing power to other electrical outlets, to reduce the power usage to the predetermined amount. During other time periods, the DSP controls the IGBT/FET device to provide a predetermined voltage that is less than the AC incoming line voltage. When the voltage drops below the predetermined voltage, such as during brownout conditions, a microprocessor controls an electronic switch on the primary windings side of a transformer system to provide a boosted output voltage.

Claims

1. A method for managing electrical power usage, comprising the steps of:

providing an allocated amount of power during a first predetermined time period through a hot output line of an IGBT/FET based device having a digital signal processor; and

monitoring the power consumed through said hot output line during said first predetermined time period with said digital signal processor;

wherein said IGBT/FET based device comprises;

at least one phase input connection configured for inputting a predetermined amount of incoming energy having at least one analog signal into said IGBT/FET based device;

at least one magnetic flux concentrator connected to said at least one phase input connection and configured for sensing said predetermined amount of incoming energy into said IGBT/FET based device;

at least one volts zero crossing point detector in electrical connection with said at least one phase input connection and configured for determining at least one zero volts crossing point of said at least one analog signal;

at least one half cycle identifier in electrical connection with said at least one phase input connection and configured for identifying at least one positive half cycle of said at least one analog signal and at least one negative half cycle of said at least one analog signal;

at least one logic device in electrical connection with said at least one volts zero crossing point detector and said at least one half cycle identifier and configured for routing said at least one positive half cycle of said at least one analog signal and said at least one negative half cycle of said at least one analog signal to said digital signal processor;

said digital signal processor in electrical connection with said at least one logic device and configured for processing said at least one analog signal;

at least one voltage reducing means having at least one drive control wherein said at least one voltage reducing means is in electrical connection with said at least one digital signal processor and is configured for reducing said predetermined amount of incoming energy by providing pulse width modulation to the at least one analog signal to yield a reduced amount of energy; and

at least one phase output connection in electrical connection with said at least one voltage reducing means and configured for outputting said reduced amount of energy out of said IGBT/FET based device.

2. The method of claim 1, further comprising the step of:

switching off the power in said hot output line when the monitored power exceeds said allocated amount of power during said first predetermined time period.

3. The method of claim 2, wherein said first predetermined time period is during anticipated blackout conditions.

4. The method of claim 1, further comprising the step of:

sending a first signal with said digital signal processor when the monitored power exceeds said allocated amount of power during said first predetermined time period.

5. The method of claim 4, wherein said first signal is an audible sound.

6. The method of claim 4, further comprising the step of:

switching off the power in said hot output line at a predetermined time after said first signal if the monitored power exceeds said allocated amount of power at said predetermined time after said first signal.

7. The method of claim 6, wherein the step of switching off occurs during the step of monitoring.

8. The method of claim 6, further comprising the step of:

switching on said allocated amount of power in said hot output line after the step of switching off.

9. The method of claim 8, wherein the step of switching on occurs in response to a command.

10. The method of claim 9, wherein said command is a change in condition of a command switch.

11. The method of claim 2, further comprising the steps of:

receiving an AC incoming line voltage with said IGBT/FET based device during a second predetermined time period;

supplying a predetermined voltage in said hot output line from said IGBT/FET based device that is less than said AC incoming line voltage during said second predetermined time period; and

measuring said AC incoming line voltage during said second predetermined time period.

12. The method of claim 11, further comprising the steps of:

providing a transformer with the transformer'"'"'s secondary windings between a hot input line and a hot output line, and the transformer'"'"'s primary windings in electrical connection at a first end with said hot input line and at a second end with an electronic switch;

receiving said AC incoming line voltage in said hot input line;

controlling said electronic switch with a microprocessor to a first condition electrically connecting said primary windings second end with said hot input line when said AC incoming line voltage is greater than said predetermined voltage during said second predetermined time period.

13. The method of claim 12, further comprising the step of:

eliminating the reactive component of a current in said second windings by short circuiting said transformer primary windings when said electronic switch is in said first condition.

14. The method of claim 12, further comprising the steps of:

controlling said electronic switch with said microprocessor to a second condition electrically connecting said second end to neutral when said AC incoming line voltage is less than said predetermined voltage during said second predetermined time period; and

increasing the voltage in said transformer hot output line with said transformer to said predetermined voltage using said electronic switch during said second predetermined time period by adding a transformer secondary voltage with said AC incoming line voltage.

15. The method of claim 14, wherein there is no interruption of the voltage in said transformer hot output line during the controlling of said switch between said first condition and said second condition.

16. The method of claim 14, wherein said switch comprises a diode bridge circuit in electrical connection with an IGBT device.

17. A system for managing electrical power usage, comprising:

an electric utility grid;

a transformer;

a microprocessor;

a power supply;

an electronic switch; and

an IGBT/FET based device;

wherein said electric utility grid is in electrical connection with a hot input line of said transformer;

wherein said transformer has secondary windings between said hot input line and a hot output line;

wherein said transformer has primary windings in electrical connection at a first end with said hot input line and at a second end with said electronic switch;

wherein said electronic switch has a first state short circuiting said primary windings, and a second state for adding a transformer secondary voltage with a mains input voltage;

wherein said microprocessor is in electrical connection with said hot input line and said electronic switch;

wherein said power supply is in electrical connection with said electronic switch and configured for providing power to said electronic switch; and

wherein said IGBT/FET based device comprises;

at least one power supply unit in electrical connection with said IGBT/FET based device and configured for powering said IGBT/FET based device;

at least one phase input connection configured for inputting a predetermined amount of incoming energy having at least one analog signal from said electric utility grid into said IGBT/FET based device;

at least one current transformer connected to said at least one phase input connection and configured for sensing said predetermined amount of incoming energy into said IGBT/FET based device;

at least one analog signal conditioning device configured for conditioning said at least one analog signal of said energy exiting said at least one current transformer;

at least one volts zero crossing point detector in electrical connection with said at least one phase input connection and configured for determining at least one zero volts crossing point of said at least one analog signal;

at least one half cycle identifier in electrical connection with said at least one phase input connection and configured for identifying at least one positive half cycle of said at least one analog signal and at least one negative half cycle of said at least one analog signal;

at least one logic device in electrical connection with said at least one volts zero crossing point detector and said at least one half cycle identifier and configured for routing said at least one positive half cycle of said at least one analog signal and said at least one negative half cycle of said at least one analog signal to at least one digital signal processor that is configured for processing said at least one analog signal;

said at least one digital signal processor in electrical connection with said at least one logic device and configured for processing said at least one analog signal;

at least one voltage reducing means having at least one drive control wherein said at least one voltage reducing means is in electrical connection with said at least one digital signal processor and is configured for reducing said predetermined amount of incoming energy to yield a reduced amount of energy by providing pulse width modulation to the at least one analog signal;

at least one phase output connection in electrical connection with said at least one voltage reducing means and configured for outputting said reduced amount of energy out of said IGBT/FET based device; and

a signal module in electrical connection with said digital signal processor and configured to provide a signal.

18. A method for managing electrical power usage, comprising the steps of:

receiving an AC incoming line voltage with an IGBT/FET based device during a first predetermined time period;

supplying a predetermined voltage in a hot output line from said IGBT/FET based device that is less than said AC incoming line voltage during said first predetermined time period;

measuring said AC incoming line voltage during said first predetermined time period;

controlling a switch on the primary windings side of a transformer with a microprocessor to a first condition when said AC incoming line voltage is greater than said predetermined voltage during said first predetermined time period;

eliminating the reactive component of a current in the secondary windings said of said transformer by short circuiting said primary windings side when said switch is in said first condition;

controlling said switch with said microprocessor to a second condition when said AC incoming line voltage is less than said predetermined voltage during said first predetermined time period; and

increasing the voltage output from the secondary windings side of said transformer to said predetermined voltage with said switch in said second condition during said first predetermined time period;

wherein said IGBT/FET based device comprises;

a means for inputting a predetermined amount of incoming energy into said IGBT/FET based device;

a means for sensing said predetermined amount of incoming energy into said IGBT/FET based device;

a means for conditioning at least one analog signal of said energy;

a means for determining at least one zero volts crossing point of said at least one conditioned analog signal;

a means for identifying at least one positive half cycle and at least one negative half cycle of said at least one conditioned analog signal;

a means for routing said at least one positive half cycle of said at least one analog signal and said at least one negative half cycle of said at least one analog signal to at least one digital signal processor;

a means for processing said at least one conditioned analog signal;

a means for reducing said at least one conditioned analog signal of said predetermined amount of energy to yield a reduced amount of energy; and

a means for outputting said reduced energy out of said IGBT/FET based device.

19. The method of claim 18, further comprising the steps of:

providing an allocated amount of power during a second predetermined time period through a hot output line of said IGBT/FET based device;

monitoring the power consumed through said hot output line during said second predetermined time period; and

switching off the power in said hot output line when the monitored power exceeds said allocated amount of power during said second predetermined time period.

20. The method of claim 19, wherein said second predetermined time period is during anticipated blackout conditions, and wherein said switch second condition is configured for brown out conditions.