Micro Grid Stabilization Device for Renewable Energy Integration
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Solution Overview
Problem
Micro grids powered by renewable energy sources experience unstable power supply, which is exacerbated by the intermittent nature of these sources, leading to inefficiencies and reliability issues in power distribution, especially in remote or island areas.
Innovation Solution
A micro grid stabilization device comprising a fuel cell group, converters, switches, a secondary battery, and a smart energy manager that adjusts and controls the operation of these components to stabilize both DC and AC bus voltages, ensuring stable power supply by integrating renewable energy sources with traditional power generation methods and energy storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If renewable energy supply apparatuses are used to power micro grids, then environmental sustainability is improved, but power supply stability deteriorates
Solution Approach 1:
The patent combines multiple power generation sources (fuel cell group and AC power generation apparatus) with energy storage devices (secondary battery) to create a hybrid microgrid system. This merging of different energy sources and storage mechanisms compensates for the intermittent nature of renewable energy, ensuring continuous and stable power supply while maintaining environmental sustainability.
Solution Approach 2:
The smart energy manager acts as an intermediary that coordinates between renewable energy sources, fuel cells, battery storage, and AC power generation. It dynamically adjusts the operation of each component based on real-time power quality conditions, smoothing out the intermittency of renewable energy and maintaining stable power output to the AC bus.
2Reliability
If multiple power generation and storage components are integrated, then power supply stability is improved, but device complexity increases
Solution Approach 1:
The smart energy manager serves multiple functions simultaneously: it controls the fuel cell group, manages battery charging/discharging, coordinates AC power generation, and monitors overall system performance. This multi-functional control unit simplifies the system architecture by consolidating what would otherwise require multiple separate control systems, reducing operational complexity while maintaining stability.
Solution Approach 2:
The system implements feedback control where the smart energy manager continuously monitors power quality on both DC and AC buses, then adjusts the operation of power generation and storage components accordingly. This closed-loop control automatically maintains stable power supply without requiring complex manual intervention or coordination, as the system self-regulates based on real-time conditions.
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 device stabilizes both DC and AC bus voltages, enhancing power reliability and reducing generation costs by optimizing the use of renewable energy sources and traditional power generation, thereby improving the economic efficiency and stability of the power supply system.
Implementation Method 1
a first fuel cell group 220... The first fuel cell group is configured to provide a first voltage
Implementation Method 2
The first converter is coupled to the first fuel cell group and transforms the first voltage to generate a first direct current (DC) voltage
Implementation Method 3
The secondary battery is coupled to the second converter and is charged according to the first charge voltage to provide a second voltage
Data Source
AI summary
A micro grid stabilization device coupled to a DC bus and an AC bus in parallel is provided. A DC power generation apparatus provides power to the DC bus. An AC power generation apparatus provides power to the AC bus. A converter is coupled between the DC bus and the AC bus to transform the voltage of the DC bus and provide the transformed voltage to the AC bus. When the voltage of the DC bus or the AC bus is unstable, the micro grid stabilization device provides power to at least one of the DC bus and the AC bus to stabilize the power of the DC bus and the AC bus.