Power control device and power control method

The power control device optimizes solar power system operations by predicting surplus power and scheduling heating operations, ensuring efficient self-consumption and reduced grid power reliance through daytime shift and skimming heating strategies.

JP2025113140AActive Publication Date: 2025-08-01SHARP ENERGY SOLUTIONS CORP
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Patent Information

Application Number
JP2024158594
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-01-22
Filing Date
2024-09-12
Publication Date
2025-08-01
Estimated Expiration
2044-09-12

AI Technical Summary

Technical Problem

Existing methods for managing surplus power in hot water storage systems with solar power generation struggle to efficiently schedule daytime shift and skimming boiling-up operations, leading to potential shortages and increased reliance on expensive grid power, especially when weather conditions deviate from predictions.

Method used

A power control device and method that predicts hourly surplus power, schedules daytime shift heating operations, and identifies times for skimming heating using a power control unit to manage a consumer's power system, including a storage water heater and solar power generation device, ensuring self-consumption without sacrificing efficiency.

Benefits of technology

The solution allows for flexible and efficient self-consumption of electricity by scheduling skimming operations during non-peak times, reducing reliance on grid power and maintaining hot water storage levels, thereby optimizing energy use and cost.

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Abstract

To promote self-consumption of power by consumers by carrying out possible idle heating without impairing the benefits of shift heating.SOLUTION: A power control device including a storage-type water heater and a solar power generation device includes a surplus power prediction unit that calculates predicted surplus power for each hour, a water heating power acquisition unit that acquires water heating power for each hour of the storage-type water heater, a shift water heating setting unit that compares the predicted surplus power with the water heating power to schedule daytime shift water heating operation, a shift water heating control unit that, when performing daytime shift water heating operation, reduces the amount of water to be heated by prior nighttime water heating operation, and a spare-moments water heating control unit that compares the surplus power for each hour with the water heating power for each hour to determine whether there is time available for spare-moments water heating operation which performs water heating operation using surplus power during a period when daytime shift water heating operation is not being performed, and performs spare-moments water heating operation if possible.SELECTED DRAWING: Figure 1
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Citation Information

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