Power Management Device for Instantaneous Load Forecasting

Solution Overview

Problem

Conventional power management devices fail to account for instantaneous and steep power consumption changes in load facilities, such as those occurring due to production condition changes or operational abnormalities, leading to inaccurate demand forecasts and potential overruns in contracted power, resulting in economic disadvantages and inefficient energy use.

Innovation Solution

A power management device with a detection unit for measuring instantaneous power consumption, a forecasting unit for predicting power usage, an operation unit to calculate differences between detected and forecasted values, and a control unit that outputs storage or discharge commands to a storage/discharge device to adjust power supply accordingly, enabling efficient power use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional demand forecast calculation is used without considering instantaneous power consumption changes, then forecast simplicity is maintained, but forecast accuracy deteriorates significantly

Engineering Contradiction:

Improvedemand forecast accuracyVSAvoidforecasting system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The system performs preliminary detection and forecasting of instantaneous power consumption values before actual consumption occurs. The detection unit continuously monitors load facilities and the forecasting unit predicts future instantaneous power consumption, enabling proactive response to steep changes before they cause contracted power overruns

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The operation unit calculates the difference between detected and forecasted instantaneous power consumption values, creating a feedback mechanism. This feedback loop allows the system to continuously adjust and improve forecast accuracy by comparing predicted values with actual measurements, addressing the accuracy issue while maintaining manageable complexity through iterative refinement

Inventive Principle:

Principle #23Feedback

2Reliability

If contracted power amount is increased to provide safety margin for instantaneous power consumption changes, then power supply reliability is improved, but energy use efficiency deteriorates

Engineering Contradiction:

Improvepower supply reliabilityVSAvoidenergy use efficiency

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system performs preliminary detection and forecasting of instantaneous power consumption values before actual consumption occurs. The detection unit continuously monitors load facilities and the forecasting unit predicts future instantaneous power consumption, enabling proactive response to steep changes before they cause contracted power overruns

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The operation unit calculates the difference between detected and forecasted instantaneous power consumption values, creating a feedback mechanism. This feedback loop allows the system to continuously adjust and improve forecast accuracy by comparing predicted values with actual measurements, addressing the accuracy issue while maintaining manageable complexity through iterative refinement

Inventive Principle:

Principle #23Feedback

3Reliability

If conventional demand forecast calculation is used without considering instantaneous power consumption changes, then system simplicity is maintained, but contracted power overrun risk increases

Engineering Contradiction:

Improvecontracted power complianceVSAvoidpower management system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The power management system is segmented into distinct functional units: a detection unit for measuring instantaneous power consumption, a forecasting unit for predicting future consumption, an operation unit for calculating differences, and a control unit for generating commands. This segmentation allows each unit to perform its specific function with focused complexity, while the overall system benefits from modular architecture that manages complexity through clear separation of concerns

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary detection and forecasting of instantaneous power consumption values before actual consumption occurs. The detection unit continuously monitors load facilities and the forecasting unit predicts future instantaneous power consumption, enabling proactive response to steep changes before they cause contracted power overruns

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10620652B2Power management device

Publication Date: 2020.04.14 TMEIC CORP

AI summary

A power management device managing electric power in a load facility group including plural load facilities includes: a detector that detects an instantaneous value of power consumption for each of the plural load facilities; a forecaster that forecasts an instantaneous value of power consumption for each of the plural load facilities; an operation unit that obtains a difference between the value detected by the detector and the value forecasted by the forecaster, for each of the plural load facilities; a controller that outputs a storage command or a discharge command based on whether the difference obtained by the operation unit is positive or negative; and a storage/discharge device that stores/discharges electricity based on the storage command or the discharge command output by the controller. The power management device can respond to instantaneous and steep power consumption amount change in a load facility to enable efficient use of power.