Management of energy demand and energy efficiency savings from voltage optimization on electric power systems using AMI-based data analysis

• US 10,784,688 B2
• Filed: 10/04/2019
• Issued: 09/22/2020
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Dominion Energy, Inc.
• Original Assignee: Dominion Energy, Inc.
• Inventors: Tyler, Stephen J., Powell, Phillip W.
• Primary Examiner(s): Everett, Christopher E.
• Application Number:
  US16/592,982
• Publication Number:
  US 20200036189A1
• Time in Patent Office: 354 Days
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 3/38 Arrangements for parallely feeding a single network by two or more generators, converters or transformers
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 10/76 Power conversion electric or electronic aspects
• CPC Class Codes: Y02E 40/70 Smart grids as climate change mitigation technology in the energy generation sector
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02E 60/50 Fuel cells
• 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
• CPC Class Codes: Y04S 40/20 Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

A method, apparatus, system and computer program is provided for controlling an electric power system, including implementation of a voltage control and conservation (VCC) system used to optimally control the independent voltage and capacitor banks using a linear optimization methodology to minimize the losses in the EEDCS and the EUS. An energy validation process system (EVP) is provided which is used to document the savings of the VCC and an EPP is used to optimize improvements to the EEDCS for continuously improving the energy losses in the EEDS. The EVP system measures the improvement in the EEDS a result of operating the VCC system in the “ON” state determining the level of energy conservation achieved by the VCC system.

Claims

1. A method of controlling an electric power grid configured to supply electric power from a supply point to a plurality of consumption locations, the method comprising:

receiving measurement data from at least one of a plurality of sensors, wherein each sensor is located at a respective one of a plurality of distribution locations on the electric power grid at or between the supply point and at least one of the plurality of consumption locations, and wherein each sensor is configured to sense at least one component of a supplied electric power received at the respective distribution location,

searching one or more boundary conditions and determining at least one control point of at least one component adjusting device that minimizes at least one linear power loss model;

adjusting a component adjusting device based on the at least one control point to adjust a component of the electric power grid.

2. The method of claim 1, wherein the at least one linear power loss model includes a power loss model from an upstream location to a downstream location.

3. The method of claim 1, wherein the at least one linear power loss model includes a power loss from an energy supply system to an energy usage system.

4. The method of claim 1, wherein the at least one linear power loss model includes a power loss from a conservation voltage reduction in an energy usage system.

5. The method of claim 1, wherein the component of the electric power is voltage.

6. The method of claim 5, wherein the component adjusting device includes at least one independent variable voltage control device.

7. The method of claim 6, wherein each of the subsets corresponds to a respective zone of the electric power grid and each of the at least one independent variable voltage control device corresponds to a respective block or zone of the electric power grid.

8. The method of claim 1, further comprising building the linear model at least partially from the measurement data.

9. The method of claim 1, further comprising searching the one or more boundary conditions using linear optimization.

10. The method of claim 1, further comprising receiving measurement data from each sensor of a subset of the plurality of sensors, and the subset is fewer then all of the plurality of sensors receiving supplied electric power.

11. The method of claim 10, wherein the subset is chosen based on a characteristic of the sensor.

12. The method of claim 11, wherein the characteristic is that the sensors are within a specific block electric power grid.

13. The method of claim 10, wherein there are a plurality of said subsets, each corresponding to a respective block of the electric power grid, and the method further comprises determining a minimum slope of an average block voltages.

14. The method of claim 1, wherein the linear power loss model utilizes a per unit value for the component of the power.

15. The method of claim 1, wherein the linear power loss model is a basis for comparison for fingerprinting of abnormal voltage operation indication for alarming and control.

16. The method of claim 1, further comprising simultaneously solving the boundary search using minimum voltages for an energy usage system to an energy delivery system point and a minimum voltage slope from the electrical location of the at least one component adjusting device.