Hybrid Power Storage Apparatus for Grid Frequency and Magnitude Control
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Solution Overview
Problem
Conventional power storage apparatuses operate separately for electric power magnitude and frequency adjustments, leading to inefficiencies due to measurement delays and lack of real-time updates in electric power information, especially when frequency variations are severe and external factors affect the electric power system.
Innovation Solution
A hybrid power storage apparatus that selectively applies electric power magnitude and frequency adjustment methods, utilizing a battery, electric power conversion unit, and control unit to receive real-time electric power information from a server, enabling optimized operation by converting and managing electric power based on system requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional power storage apparatuses operate separately for electric power magnitude and frequency adjustments, then device complexity is reduced, but operational efficiency deteriorates due to measurement delays and lack of real-time updates
Solution Approach 1:
The patent combines separate magnitude adjustment and frequency adjustment operations into a unified hybrid power storage system. The control unit integrates both adjustment methods, allowing the battery to simultaneously perform magnitude adjustment (storing excess power during low-demand periods) and frequency adjustment (maintaining system frequency stability), thereby resolving the contradiction between simple separate operation and efficient integrated operation
2Productivity
If real-time electric power information is received from a server, then operational optimization is improved, but device complexity increases due to additional communication components
Solution Approach 1:
The patent introduces a server as an intermediary that provides real-time electric power information (magnitude and frequency) to the hybrid power storage system. The control unit receives this information via wireless communication and uses it to optimize battery operations, achieving real-time optimization without requiring complex direct sensing and measurement infrastructure at the battery site
3Use of energy by moving object
If electric power magnitude adjustment method is used, then energy storage efficiency is improved, but frequency stability deteriorates when frequency variations are severe
Solution Approach 1:
The patent implements dynamic switching between magnitude adjustment and frequency adjustment modes based on real-time system conditions. When frequency variations are severe, the control unit prioritizes frequency adjustment; when frequency is stable, it focuses on magnitude adjustment for energy storage efficiency, thereby adapting to changing conditions and resolving the contradiction between energy storage and frequency stability
4Reliability
If electric power frequency adjustment method is used, then frequency stability is improved, but energy storage efficiency deteriorates due to grossly inefficient charging and discharging operations
Solution Approach 1:
The patent applies partial frequency adjustment rather than continuous full-frequency adjustment. The control unit performs frequency adjustment only when necessary to maintain system frequency within acceptable ranges, while primarily focusing on magnitude adjustment for energy storage. This partial action approach maintains frequency stability without the excessive energy losses associated with continuous frequency-based charging/discharging operations
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
The hybrid system achieves efficient operation by reflecting real-time electric power information updates, optimizing power supply and consumption by selectively adjusting magnitude and frequency, thereby improving operational efficiency and stability within the electric power system.
Implementation Method 1
a battery configured to store first electric power supplied to an electric power system and second electric power supplied therefrom
Implementation Method 2
an electric power conversion unit configured to convert the first electric power into an alternating current (AC) power and the second electric power into a direct current (DC) power
Data Source
AI summary
A hybrid power storage apparatus according to one embodiment of the present disclosure includes a battery configured to store first electric power supplied to an electric power system and second electric power supplied therefrom; an electric power conversion unit configured to convert the first electric power into an alternating current (AC) power and the second electric power into a direct current (DC) power; and a control unit configured to receive electric power information of the electric power system from a server, and control the battery and the electric power conversion unit to supply electric power to the electric power system or to receive electric power supplied therefrom based on a magnitude or a frequency of electric power included in the received electric power information.