DC Grid Renewable Energy System with Optical Fibre Control
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Solution Overview
Problem
Existing systems for converting distributed renewable energy into usable energy lack failure-free operation and efficient data exchange over long distances, and do not allow for easy expansion or integration with various renewable energy sources.
Innovation Solution
A system that combines photovoltaic and other renewable energy generators in series or parallel to form a DC grid, with a DC/AC converting unit that includes MPPT controller modules and a battery charging module, connected to an optical fibre network for data transmission and management, enabling efficient energy conversion and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If distributed renewable energy generators are connected in series or parallel to form a DC grid, then the system can integrate various renewable energy sources, but the system lacks failure-free operation and efficient data exchange over long distances
Solution Approach 1:
The system divides the distributed renewable energy network into modular units, each equipped with its own controller module. These modules can be independently managed and monitored, improving reliability while maintaining versatility. Each module processes data locally before transmitting consolidated information through the optical fibre network.
Solution Approach 2:
The patent introduces an optical fibre network as an intermediary communication medium between distributed generators and the central DC/AC converting unit. This intermediary enables reliable data exchange over long distances with immunity to electromagnetic interference, solving the communication reliability problem in distributed renewable energy systems.
2Adaptability or versatility
If distributed renewable energy generators are connected in series or parallel to form a DC grid, then the system can integrate various renewable energy sources, but data exchange over long distances is inefficient
Solution Approach 1:
The optical fibre network serves as an intermediary communication channel that transmits data between distributed generators and the central control unit with high efficiency and immunity to electromagnetic interference. This resolves the data exchange inefficiency problem in long-distance distributed energy systems.
Solution Approach 2:
The patent replaces traditional electrical or wireless communication methods with optical fibre communication. This substitution eliminates electromagnetic interference and signal degradation issues, enabling efficient data exchange over long distances while maintaining system versatility.
3Productivity
If a DC/AC converting unit is used to convert electric energy, then usable AC energy is produced, but the system does not allow for easy expansion or integration with various renewable energy sources
Solution Approach 1:
The system employs modular controller modules that can be independently added or removed from the DC/AC converting unit. This modular architecture enables easy system expansion while maintaining stable AC energy production. Each module can handle different renewable energy source types, enhancing integration capability.
Solution Approach 2:
The DC/AC converting unit is designed with universal controller modules that can interface with multiple types of renewable energy generators (photovoltaic, wind, hydroelectric). This multi-functionality allows the system to maintain efficient AC power conversion while accommodating various energy sources and future expansions.
4Device complexity
If traditional communication methods are used in distributed energy systems, then system complexity is reduced, but data exchange over long distances suffers from interference and inefficiency
Solution Approach 1:
The optical fibre network acts as an intermediary communication medium that isolates the control system from electromagnetic interference. This intermediary layer maintains data exchange reliability over long distances without significantly increasing system complexity, as standard optical communication protocols are used.
Solution Approach 2:
The patent substitutes electrical or wireless communication systems with optical fibre communication. This substitution eliminates electromagnetic interference issues while maintaining relatively simple system architecture through the use of standardized optical communication interfaces and protocols.
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 system ensures failure-free operation, reduces energy losses, allows for expansion, and enables efficient data exchange over long distances, supporting various renewable energy sources and providing usable AC energy while managing distributed renewable energy modules.
Implementation Method 1
connected to an optical fibre network for data transmission and management
Implementation Method 2
photovoltaic generators coupled with MPPT controller modules
Data Source
Figure 1~2
AI summary
The subject of the invention is a system for converting distributed renewable energy generated by both photovoltaic generators and renewable energy generators of types other than photovoltaic into usable energy, said generators being connected to each other in series creating a thus DC grid terminated with a converting station with power equalling the sum of powers of the individual generators, characterised in that it comprises a main DC/AC converting unit (2) coupled bidirectionally with at least one MPPT controller module (3) designed to co-operate with photovoltaic panels and coupled bidirectionally with the accumulator battery charging controller module (4), at least one MPPT controller module (5) designed to co-operate with renewable energy generators other than photovoltaic ones, and the electric vehicle charging station controller module (6), whereas the main DC/AC converting unit (2), the MPPT controller modules (3 and 5), and the accumulator battery charging controller module (4) are connected in parallel with common voltage bus (7) with elevated DC voltage.