Wind Turbine Battery Storage with Switchable Cell Voltage Control
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Solution Overview
Problem
Existing wind turbine energy storage systems struggle to efficiently manage power fluctuations due to varying wind speeds and grid consumption, leading to inefficiencies in energy storage and delivery.
Innovation Solution
Integrating a battery storage system with individually controllable battery cells and semiconductor switches, controlled by a controller to manage current flow paths, allowing for flexible energy storage and delivery based on voltage and grid requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rechargeable batteries are connected directly to the DC-link in a back-to-back converter, then energy storage and delivery can be achieved, but the system complexity and difficulty of integration increase
Solution Approach 1:
The battery storage system is divided into multiple individually controllable battery cells, each with its own semiconductor switches. This segmentation allows independent control of each cell, simplifying the overall system integration while maintaining reliable energy storage and delivery capabilities.
Solution Approach 2:
The system employs dynamic control of semiconductor switches to manage current flow paths through battery cells. The controller can dynamically reconfigure which cells are active or bypassed based on operational requirements, enabling flexible energy storage and delivery without complex hardwired connections.
2Adaptability or versatility
If battery storage is integrated into the wind turbine with individually controllable cells, then flexibility in energy management is improved, but the device complexity increases
Solution Approach 1:
The battery storage is segmented into multiple cells with individual semiconductor switches and control capabilities. This allows the system to adapt energy management strategies by selectively activating or bypassing specific cells based on voltage requirements, state of charge, and operational conditions without requiring complete system redesign.
Solution Approach 2:
The controller changes operational parameters by adjusting which battery cells are active or bypassed, thereby modifying the effective voltage and current characteristics of the battery storage system. This enables flexible adaptation to varying grid requirements and wind turbine operational states.
3Manufacturing precision
If semiconductor switches are used to control current paths through battery cells, then voltage control precision is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
Each battery cell is equipped with semiconductor switches that enable self-service voltage control. The controller automatically manages which cells are active or bypassed based on real-time voltage requirements, eliminating the need for complex external voltage regulation circuitry and simplifying manufacturing while maintaining precision.
Solution Approach 2:
The system uses dynamic switching of semiconductor devices to achieve precise voltage control. By rapidly switching cells in and out of the active circuit, the system can precisely regulate voltage output without requiring complex analog control circuitry, thereby improving manufacturing ease while maintaining control precision.
4Productivity
If battery cells can be bypassed or activated dynamically, then operational efficiency is improved, but the control system complexity increases
Solution Approach 1:
The battery storage is divided into independently controllable cells, allowing the control system to optimize operational efficiency by selectively activating only the necessary number of cells based on power requirements. This segmentation enables efficient charge/discharge cycles while keeping the control logic relatively simple and modular.
Solution Approach 2:
The control system uses feedback from voltage and current measurements to dynamically adjust which battery cells are active or bypassed. This feedback mechanism enables the system to maintain optimal operational efficiency by responding to real-time conditions without requiring overly complex predictive control algorithms.
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 efficient energy storage and delivery, reduces capital and operational expenses, and enhances reliability by allowing flexible voltage control and easy retrofitting, while maintaining battery health and reducing harmonic currents.
Implementation Method 1
a battery storage electrically connected to the electric flow path, the battery storage comprising a plurality of battery cells
Implementation Method 2
each battery cell comprising at least one battery element and at least two semiconductor switches
Data Source
AI summary
A battery storage and/or a wind turbine including the battery storage. A generator for generation of an electric current. An electric flow path configured for conducting the electric current to an electric grid via a power converter, the power converter. The battery storage electrically connected to the electric flow path, the battery storage comprising a plurality of battery cells, each battery cell comprising at least one battery element and at least two semiconductor switches. A controller is configured for selectively controlling the voltage over the battery storage by controlling the status of the at least two semiconductor switches of a plurality of the battery cells, and thereby whether a current path through the battery storage is bypassing the at least one battery element or passing through the at least one battery element of one or more of the plurality of battery cells.