Power Management System

• US 20140015323A1
• Filed: 07/09/2013
• Published: 01/16/2014
• Est. Priority Date: 07/10/2012
• Status: Abandoned Application

• Current Assignee: Arista Power, Inc.
• Original Assignee: Arista Power, Inc.
• Inventors: Matthews, Mark
• Application Number:
  US13/937,356
• Publication Number:
  US 20140015323A1
• Time in Patent Office: Days
• US Class Current: 307/52
• CPC Class Codes: H02J 2300/10 The dispersed energy generation being of fossil origin, e.g. diesel generators
• CPC Class Codes: H02J 2300/20 The dispersed energy generation being of renewable origin
• CPC Class Codes: H02J 2310/64 The condition being economic, e.g. tariff based load management
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 3/40 Synchronising a generator for connection to a network or to another generator
• CPC Class Codes: H02J 3/466 Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
• CPC Class Codes: H02J 4/00 Circuit arrangements for mains or distribution networks not specified as ac or dc
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02E 40/10 Flexible AC transmission systems [FACTS]
• CPC Class Codes: Y02E 70/30 Systems combining energy storage with energy generation of non-fossil origin
• CPC Class Codes: Y02P 90/40 Fuel cell technologies in production processes
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 50/10 Energy trading, including energy flowing from end-user application to grid

Abstract

A system to energy being used from the electric grid as well as being used and generated from one or more energy generators or fuel-powered turbines, including, but not limited to, natural gas generators, fuel cells, diesel generators, bio-diesel generators, ethanol generators, propane generators, biogas generators and kerosene generators, or a combination of any or all of these sources, with or without a battery energy storage system, resulting in (a) a reduction of the peak power demand from the electric grid of a user of the system, and/or (b) a reduction of the high consumption charges during times in which consumption costs are higher due to variable billing or otherwise, and/or (c) the ability to provide energy to the user of the system at a time that such user is offsetting, in whole or in part, a reduction of its demand from the electric grid to, among other things, quality for, participate in and/or satisfy the requirements of demand response or similar programs with third parties.

Claims

1. A power management system for reducing peak demand on the electric grid having one or more energy generators or fuel-powered turbines, including, but not limed to, natural gas generators, fuel cells, diesel generators, bio-diesel generators, ethanol generators, propane generators, biogas generators and kerosene generators, or a combination of any or all of these sources with or without a battery energy storage system, comprising

a generator;

an automatic transfer switch

a circuit breaker;

a battery energy storage system inverter/charger; and

a energy inverter and/or rectifier, wherein

said circuit breaker is connected to said electric grid and at least one of said generator, energy inverter and rectifier, said battery energy storage system inverter/charger and said power load,

said energy generator being also connected to said at least one onsite connected energy source,

said generator with or without battery energy storage system inverter/charger being connected to said at least one onsite connected energy source and to said generator with or without battery energy storage system and via said circuit breaker to the power load,

wherein said system is configured to

provide power to said power load and/or to said grid from said least one onsite connected energy source and/or said generator with or without battery energy storage system,

wherein said system is configured to (a) reduce peak power demand, and/or (b) reduce consumption charges during times in which consumption costs are higher due to variable billing or otherwise, and/or (c) provide energy to the user of the system at a time that such user is offsetting, in whole or in part, a reduction of the demand from the electric grid to, among other things, quality for, participate in and/or satisfy the requirements of demand response or similar programs with third parties, by performing at least one of the following steps if a battery energy storage system is integrated into the power management system;

(a) Charging the battery energy storage system at predetermined times;

(b) Monitoring the power load taken from the electric grid and, when such power load is detected to fall below a predetermined level, charging the battery energy storage system;

(c) Monitoring the power load taken from the electric grid and, when such power load is below the appropriate level as determined by the power management system, charging the battery energy storage system; and

(d) Monitoring the remaining capacity level of the battery energy storage system and, when the remaining capacity of the battery energy storage system drops below a predetermined level or an appropriate level as determined by the power management system, charging the battery energy storage system.

2. A power management system according to claim 1, wherein said system is configured to release/discharge energy and/or power from the generator with or without battery energy storage system by performing at least one of the following steps:

(a) discharging the battery energy storage system and/or placing some or all of the load on the generator(s) at previously designated times and/or durations,

(b) monitoring the current power load taken from the electric grid, and discharging the battery energy storage system and/or placing some or all of the load on the generator(s), if the current power load taken from the electric grid is greater than or equal to predetermined threshold levels, and

(c) monitoring the current power load taken from the electric grid, and discharging the battery energy storage system and/or placing some or all of the load on the generator(s), if the current power load taken from the electric grid is greater than or equal to the amount determined by the power management system to be a threshold point for reducing the power load taken from the electric grid.

3. A power management system according to claim 1, wherein said system is configured to determine the amount of energy to be discharged from the battery energy storage system and/or generator(s) at the correct power rate by performing at least one of the following steps:

(a) discharging the battery energy storage system and/or placing some or all of the load on the generator(s) at previously designated times amounts of energy at predetermined power rates;

(b) discharging the battery energy storage system and/or placing some or all of the load on the generator(s) with an amount of energy calculated by monitoring the current power load taken from the electric grid and discharging/providing only such amounts of energy release from the battery energy storage system and/or generated by the generator(s) as would be necessary to lower the power load taken from the electric grid to an amount that is a little less than or equal to previously designated levels; and

(c) discharging the battery energy storage system and/or placing some or all of the load on the generator(s) with an amount of energy calculated by monitoring the end user'"'"'s current power load taken from the electric grid and discharging and/or providing only such amounts of energy stored in the battery energy storage system and/or generated by the generator(s) as would be necessary to lower the power load taken from the electric grid to an amount that is a little less than or equal to the appropriate amount of power load to be taken from the electric grid as determined by the power management system.

4. A power management system according to claim 1, wherein said power management system is configured to distribute the energy generated by said at least one onsite connected energy source in accordance with the following hierarchy:

(a) first, energy generated by the at least one onsite connected energy source is used to supplement or replace grid power to meet the current power loads;

(b) second, if the energy generated by said at least one onsite connected energy source exceeds the current power load, any excess power generated by said at least one onsite connected energy source will be used to charge the battery energy storage system if such a battery energy storage system is integrated with the power management system; and

(c) third, if the energy generated by said at least one onsite connected energy source exceeds the current power load and the battery energy storage system, if integrated with the power management system, has no additional capacity to store additional energy at that time, the energy will be supplied to support the facility load.

6. A power management system according to claim 1, wherein said power management system is configured to use grid power to partially or fully fulfil the requirement of power load after passing through the circuit breaker.

7. A power management system according to claim 1, wherein said charging the generator comprises charging the battery energy storage system with one of:

(a) predetermined amounts of energy;

(b) such amounts of energy necessary to charge the battery energy storage system to a predetermined capacity level, i.e., between 80% to 100% full; and

(c) such amount of energy necessary to charge the battery energy storage system to an appropriate level as determined by the power management system.

8. A power management system according to claim 1, wherein each said monitoring is performed in or close to real-time.

9. A power management system according to claim 1, wherein said power management system is connected

to said electric grid,

to said at least one onsite connected energy source,

to said generator with or without battery energy storage system and

to said power load.

10. Method according to claim 9, wherein

obtaining the time of day,

determining whether said obtained time of day is within a range of times of day to discharge energy from the battery energy storage system, if integrated into the power management system, and/or generating power from the generator(s),

if it is determined that said obtained time of day is not within said range of times in which the generator(s) with or without a battery energy storage system is directed to not discharge energy from the battery energy storage system, if integrated into the power management system, and/or generating power from the generator(s), and instead putting said generator(s) with or without a battery energy storage system inverter/charger is into standby mode, and,

returning to said obtaining the time and the following steps,

if it is determined that said obtained time of day is within said range of times as which the generator(s) with or without battery energy storage system is directed to discharge energy from the battery energy storage system, if integrated into the power management system, and/or generate power from the generator(s) based on programmed parameters,

after the power has been provided based said parameters determining whether the operation is complete,

if the system operation is determined to be complete, returning to said obtaining of said time of day and said following steps,

if said system operation is determined not to be complete repeating said discharging/generating power, until the discharge is determined to be complete.

11. Method according to claim 9, wherein said method according to claim 9 comprises:

if it has been determined that the battery energy storage device is sufficiently charged,

determine the power load taken from the electric grid,

determining if the power load taken from the electric grid is not at or in excess of a predetermined threshold at which the battery energy storage system is directed to discharge energy,

if said power load taken from the electric grid is not at or in excess said predetermined threshold putting said battery energy storage system inverter/charger into standby mode,

if said power load taken from the electric grid is at or in excess of said predetermined threshold, discharge energy from the battery energy storage system according to determined discharge parameters,

after the discharge has been concluded, return to said determining step whether the battery energy storage system is still sufficiently charged with energy.

12. Computer program product comprising computer readable instructions stored on a computer readable medium for causing a computer to perform method steps, when said computer readable instructions are executed on a computer or a computerized power management system, comprising:

program code for determining a level of power available from generator with or without battery energy storage system,

program code for determining whether or not said generator with or without battery energy storage system is sufficiently able to provide power,

program code for obtaining a time of day, to be determined, and

program code for putting the generator into standby mode,

program code for charging the battery energy storage system at a previously determined duration and rate of charge, and

program code for evaluating whether said charging is completed,

program code for returning to said obtaining of time step,

program code for obtaining the day of the week, and

program code for determining if said obtained day of the week is Sunday or Saturday,

program code for resetting and putting the generator into Standby mode, and

program code for float charging said battery energy storage system and returning to said obtaining of the day or the week and said following steps, and

program code for monitoring real time demand, and

program code for obtaining said generator status and battery energy storage charge or discharge values, and

program code for communicating said generator status and battery energy storage charge or discharge values to power management system, and

program code for controlling release and/or charge from/into said generator with or without battery energy storage, and

program code for determining end of operation/charge and/or discharge of the generator with or without battery energy storage, and

program code of setting or determining demand value or operation/discharge set points, and

program code for communicating data regarding the power management system, and

program code for logging diagnostic information regarding the power management system.