Electric Power Control Device for Multi-Service Storage
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Solution Overview
Problem
Existing electric power management systems do not adequately utilize distributed power sources, such as high-control-capability electricity storage systems, for services beyond peak shaving, limiting their general usefulness and economic efficiency.
Innovation Solution
An electric power control method that assigns peak shaving or other services to specific time slots, manages consumption power, and uses electricity storage systems for peak shaving and other services like load frequency adjustment, allowing the system to participate in multiple services while optimizing power-purchase management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electricity storage system is dedicated to peak shaving control, then the power-purchase electric power peak is reduced effectively, but the system cannot participate in other electric power services
Solution Approach 1:
The electricity storage system is designed to perform multiple functions by switching between peak shaving control and other electric power services based on time slots and system conditions. The control device manages the storage system to participate in load frequency adjustment, negawatt transactions, and other services while maintaining peak shaving capability when needed, thereby achieving multi-functionality and resolving the contradiction between dedicated peak shaving performance and service versatility.
2Adaptability or versatility
If the electricity storage system is used for other services with high control capability, then service participation is enabled, but peak shaving capability may be compromised
Solution Approach 1:
The time period is divided into different time slots, with specific slots allocated for peak shaving control and other slots for alternative services. The control device determines the appropriate service based on the current time slot and system state, allowing the electricity storage system to segment its operations between peak shaving and other services, thereby maintaining peak shaving effectiveness while enabling service versatility.
Solution Approach 2:
The control device dynamically switches the electricity storage system between different operating modes (peak shaving vs. other services) based on real-time conditions including remaining charge capacity, target electric power thresholds, and service requirements. This dynamic adjustment ensures optimal performance for the active service while preserving capability for peak shaving when conditions warrant it.
3Adaptability or versatility
If the remaining charge capacity threshold is set low, then more capacity is available for other services, but peak shaving reliability decreases
Solution Approach 1:
The control device continuously monitors the remaining charge capacity of the electricity storage system and uses this feedback to make real-time decisions about service allocation. When the remaining charge capacity falls below the threshold during peak shaving operations, the system automatically switches to other services or adjusts operations to ensure peak shaving reliability is maintained while still allowing flexibility for alternative service participation when capacity permits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the electricity storage system to participate in various services, including load frequency adjustment, thereby improving its overall usefulness and economic efficiency by effectively managing power-purchase costs and providing backup during power failures.
Implementation Method 1
an electric power storage device disposed in customer... discharging the electric power storage device
Data Source
AI summary
An electric power control method for an electric power load and an electric power storage device including assigning one of a peak shaving control or other services to at least one of time slots that are divided by a specific time unit, obtaining a consumption power of the electric power load of each of the time slots, determining power-purchase electric power according to the consumption power of each of the time slots, restricting a consumption power of the electric power load at one or more peak slots where the consumption power of the electric power load is more than or equal to a target power-purchase electric power upper limit, restricting the restricted consumption power of the electric power load and discharging the electric power storage device at one or more peak slots if the restricted consumption power of the electric power load is more than or equal to a target power-purchase electric power upper limit and the peak shaving is assigned.