Predictive phase balancing for demand response

• US 9,356,447 B2
• Filed: 07/24/2012
• Issued: 05/31/2016
• Est. Priority Date: 07/24/2012
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Mukherjee, Maharaj
• Primary Examiner(s): Everett, Christopher E
• Application Number:
  US13/556,781
• Publication Number:
  US 20140031997A1
• Time in Patent Office: 1,407 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H02J 3/003 Load forecast, e.g. methods or systems for forecasting future load demand
• CPC Class Codes: H02J 3/26 Arrangements for eliminating or reducing asymmetry in polyphase networks
• CPC Class Codes: H02J 3/28 Arrangements for balancing of the load in a network by storage of energy
• CPC Class Codes: Y04S 10/50 Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

Predictive phase balancing is implemented by a host system computer and logic executable by the host system computer. The logic is configured to receive customer demand profiles from each customer serviced by a poly-phase grid network and create a demand forecast from anticipated power demands collected from the customer demand profiles. Creating the customer demand profiles includes breaking down loads for each customer by corresponding phases in the poly-phase power grid network. The loads correspond to the anticipated power demands. The logic is also configured to balance the loads among each of the phases based on any load imbalances determined from the demand forecast.

Claims

1. A system for implementing predictive phase balancing, the system comprising:

a host system computer; and

logic executable by the host system computer, the logic configured to implement a method, the method comprising;

transmitting a request, for a projected power demand, to each customer of a plurality of customers serviced by a poly-phase grid network;

receiving corresponding projected power demands from at least a portion of the plurality of customers and storing the projected power demands as customer demand profiles;

creating a demand forecast at least in part from the projected power demands collected from the customer demand profiles, the creating comprising breaking down loads for each customer by corresponding phases in the poly-phase power grid network, the loads corresponding to the projected power demands; and

balancing the loads among each of the phases based on any load imbalances determined from the demand forecast;

wherein the logic is further configured to implement;

re-balancing the loads among each of the phases based on load imbalances determined from data collected from a smart meter in conjunction with the projected power demands received from the plurality of customers.

2. The system of claim 1, wherein the creating further includes breaking down the loads for each customer into time intervals, wherein balancing the loads among each of the phases includes balancing the loads among the phases within one of the time intervals.

3. The system of claim 2, wherein the logic is further configured to implement:

determining the load imbalances in the demand forecast, comprising;

summing a quantified value of the loads in each of the phases and for each of the time intervals resulting in a total summation value for each of the phases and for each of the time intervals;

storing the loads and corresponding total summation values for each of the phases and at each of the time intervals; and

for each of the time intervals;

determining a difference between the summation value of a first phase of the phases and a second phase of the phases, a difference between the second phase of the phases and a third phase of the phases, and a difference between the first phase and the third phase; and

upon determining that the difference between any of the summation values exceeds a threshold value, incrementally removing smallest loads from the phase having the highest summation value and iteratively re-allocating the smallest loads to other phases until the loads in all of the phases are balanced, the loads determined to be balanced when each of the summation values is substantially equal to one another.

4. The system of claim 2, wherein the time intervals are represented in hours.

5. The system of claim 2, wherein the time intervals are represented in days.

6. The system of claim 1, wherein balancing the loads among each of the phases is implemented by a phase switch in the poly-phase grid network.

7. The system of claim 1, wherein the projected power demands for at least one of the customer demand profiles are calculated as a function of an occupancy rate for a facility of the corresponding customer.

8. The system of claim 1, wherein transmitting the request for a projected power demand includes transmitting the request for the projected power demand in units of power for a given time period;

and

wherein the host system computer receives the projected power demand in the requested units of power from the customer.

9. The system of claim 1, further comprising:

providing a discount in an energy bill for the customer in return for participation in providing the host system computer with the projected power demand.