Battery Energy Storage for Grid Frequency Disturbance Control
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Solution Overview
Problem
Conventional electrical power systems face challenges in managing frequency disturbances, particularly when a primary power generation source is lost, as they rely on slower and less reliable backup sources that have limitations in start-up time and efficiency, leading to potential service interruptions.
Innovation Solution
A dynamic power compensator with a battery energy storage system is used to detect frequency disturbances and control power output, providing immediate support during the transitional phase by engaging in peak and endurance modes, allowing less suitable backup sources to start up while minimizing frequency dips and optimizing energy storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional backup power generation sources (gas turbines, diesel engines, steam turbines) are engaged to compensate for lost generation, then power supply reliability is improved, but start-up time increases and response speed deteriorates
Solution Approach 1:
A battery energy storage system acts as an intermediary between the loss of a power generation source and the start-up of conventional backup sources. The battery compensates for the power deficit during the transition period, enabling faster overall response while maintaining reliability.
Solution Approach 2:
The battery energy storage system is pre-charged and ready to provide immediate power compensation when a generation source is lost. This preliminary preparation eliminates the need to wait for conventional backup sources to start up, significantly reducing response time.
2Quantity of substance
If conventional backup power generation sources are engaged, then power demand is met, but production costs increase due to lower efficiency
Solution Approach 1:
The system changes the operational parameters by using battery energy storage instead of conventional thermal power plants for rapid response. This parameter change (from thermal to electrochemical energy conversion) dramatically improves efficiency and reduces production costs while meeting the same power output requirements.
3Speed
If battery energy storage is used to compensate for power loss, then response time is reduced, but energy storage capacity must be increased
Solution Approach 1:
The battery energy storage system provides only the partial power compensation needed during the critical transition period until backup sources are online. It does not need to provide full continuous power, reducing the required storage capacity while achieving fast response times.
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
This solution enables rapid handling of short-term frequency disturbances, extends the time for start-up procedures of additional power generation sources, and allows for the use of less reliable sources, thereby maintaining grid stability and reducing the need for costly and inefficient rapid power generation.
Implementation Method 1
a dynamic power compensator having a battery energy storage
Data Source
AI summary
The invention relates to a method in an electric power system including one or more power generation source(s) and a dynamic power compensator having a battery energy storage. The method includes the steps of: detecting a frequency disturbance within the electricity power system requiring an additional power generation source to be connected to the electricity power system in order to meet a power demand; and controlling the power output from the battery energy storage of the dynamic power compensator during start-up of the additional power generation source thereby limiting the frequency disturbance within the electric power system. The invention also relates to a controller, computer program, computer program products and electric power system.