VVO Evaluation Method Using Rapid On-Off Cycling

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Solution Overview

Problem

Current Volt/VAR Optimization (VVO) system evaluations are time-consuming and costly, requiring a 60 or 90-day on/off cycle to validate effectiveness, which results in lost benefits and high data collection needs.

Innovation Solution

A method that transitions the VVO system from an on state to an off state at frequent intervals (e.g., twice a day) for brief periods (5-15 minutes) to collect data before and after the transition, allowing for rapid evaluation of energy consumption changes, reducing the need for extensive data collection and temperature correction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a 60 or 90 day on/off evaluation process is used to validate VVO effectiveness, then measurement precision is improved, but loss of time and productivity deteriorate

Engineering Contradiction:
Improveevaluation accuracyVSAvoidevaluation period
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by collecting and analyzing baseline data during normal VVO operation before conducting the actual evaluation. The system pre-processes data from multiple sources (SCADA, weather stations, customer usage patterns) to establish expected energy consumption patterns, so that when the evaluation period begins, the comparison can be made immediately without requiring a long baseline period. This allows for a shortened evaluation window while maintaining statistical significance.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary computational model that acts as a mediator between the limited evaluation data and the required measurement precision. The model uses machine learning algorithms to interpolate and extrapolate energy consumption patterns, filling gaps in the shortened evaluation period data. This intermediary processing layer enables accurate evaluation results to be derived from a compressed time frame that would otherwise be insufficient for direct measurement.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If a 60 or 90 day on/off evaluation process is used to validate VVO effectiveness, then measurement precision is improved, but device complexity and cost deteriorate

Engineering Contradiction:
Improveevaluation accuracyVSAvoidevaluation system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent implements universality by designing an evaluation system that performs multiple functions within a single integrated platform. The system simultaneously collects operational data, weather data, customer usage patterns, and evaluation metrics while executing the evaluation algorithm and generating reports. This multi-functional approach consolidates what would otherwise require separate systems for data collection, analysis, and reporting, reducing overall complexity despite the sophisticated evaluation methodology.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The evaluation system applies self-service by automatically collecting data from connected sources, processing the information through the evaluation algorithm, and generating results without requiring external manual intervention. The system self-calibrates using baseline data and automatically adjusts for confounding variables such as weather changes and customer behavior patterns, eliminating the need for manual data collection and analysis teams that would increase system complexity.

Inventive Principle:
Principle #25Self-service

3Measurement precision

If the VVO system is turned off on alternate days for testing purposes, then measurement precision is improved, but loss of energy benefits deteriorates

Engineering Contradiction:
Improveevaluation accuracyVSAvoidlost VVO benefits
Core Design Contradiction:
Measurement precisionVSLoss of energy

Solution Approach 1:

The patent applies periodic action by implementing a evaluation schedule that interrupts VVO operation only during brief, predetermined intervals rather than on alternate days. The system collects evaluation data during these short periodic windows when VVO is temporarily disabled, then immediately resumes normal operation. This periodic sampling approach provides sufficient data for accurate measurement while minimizing the total time VVO is offline, thereby reducing lost energy benefits compared to extended alternate-day shutdowns.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The evaluation methodology uses partial action by disabling VVO for only the minimum necessary duration and scope required to collect statistically significant data. Rather than turning off the entire system for long periods, the patent selectively disables specific VVO functions or specific feeders for brief evaluation windows, collecting sufficient data to assess overall system effectiveness while keeping the majority of VVO operations active and delivering energy benefits throughout the evaluation period.

Inventive Principle:
Principle #16Partial or excessive action

Data Source

PatentUS10725075B2Method of evaluating change in energy consumption due to Volt VAR optimization
Publication Date: 2020.07.28 AMERICAN ELECTRIC POWER CO INC
  • US10725075B2 patent drawing
  • US10725075B2 patent drawing
  • US10725075B2 patent drawing

AI summary

A method of evaluating an optimization system is disclosed. The system is transitioned from an on state to an off state. Data is collected at time intervals for a time period before and after the system is transitioned from the on state to the off state. The transitioning occurs while a load of a particular type is active. In one embodiment, the optimization system is a Volt/VAR Optimization (VVO) system.