Dual DC Bus Power Supply for Fault-Tolerant Water-Bound Zones
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Solution Overview
Problem
Existing energy supply systems for floating and water-based facilities face challenges in providing flexible and efficient energy distribution, particularly in maintaining operation during faults, due to the need for multiple transformers and high losses associated with AC networks, which are cumbersome and costly.
Innovation Solution
A dual DC voltage bus system with a first DC voltage bus for a higher voltage level and a second DC voltage bus for a lower voltage level, allowing direct electrical connections without transformers, and utilizing generators with separate winding systems to feed both buses, enabling flexible energy distribution and redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If AC networks with multiple transformers are used for energy distribution, then energy can be distributed across different voltage levels, but energy losses increase and system complexity increases
Solution Approach 1:
The patent replaces the traditional AC network with transformers (electromagnetic transformation system) with a DC network using power electronic converters (electronic transformation system). This substitution eliminates the need for multiple transformers and reduces energy losses associated with electromagnetic transformation, while maintaining the capability to distribute energy across different voltage levels through controlled power electronic conversion.
Solution Approach 2:
The patent changes the fundamental electrical parameters from AC to DC and implements a multi-level DC voltage architecture. By using controllable power electronic converters, the system can dynamically adjust voltage levels and distribute energy flexibly without the inherent losses of transformer-based AC systems, thereby reducing energy losses while maintaining adaptability.
2Adaptability or versatility
If AC networks with multiple transformers are used for energy distribution, then energy can be distributed across different voltage levels, but device complexity increases
Solution Approach 1:
The patent replaces the complex physical transformer infrastructure with power electronic converters that can be more easily controlled and integrated. This substitution simplifies the overall system architecture by eliminating bulky transformer components and their associated cooling, insulation, and mechanical maintenance requirements, while achieving the same voltage transformation and distribution functions through electronic control.
3Reliability
If multiple independent drive systems are provided for maintaining position and propulsion, then operational reliability improves during faults, but system complexity increases
Solution Approach 1:
The patent implements a universal multi-level DC power supply system that can serve multiple independent drive systems (propulsion and position maintenance) from a common electrical infrastructure. The system's modular architecture and flexible power distribution capability allow any drive to be supplied from any available energy source, providing redundancy and reliability without requiring completely separate independent systems for each function.
Solution Approach 2:
The patent employs dynamic power distribution control where the allocation of power from different energy sources to different drives can be dynamically adjusted based on operational requirements and fault conditions. This dynamic flexibility allows the system to maintain reliability by rerouting power flow as needed, reducing the need for permanently duplicated infrastructure.
4Adaptability or versatility
If traditional AC power distribution with transformers is used, then energy can be transformed between voltage levels, but cost increases due to multiple transformers
Solution Approach 1:
The patent replaces expensive transformer hardware with power electronic converters that achieve voltage transformation through electronic switching and synthesis. This substitution eliminates the need for multiple heavy, costly transformers and their associated infrastructure, while providing the same voltage level adaptation capability through controlled power conversion, thereby significantly reducing system cost.
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 configuration reduces energy losses, simplifies the system design, and enhances fault tolerance and flexibility, allowing for efficient energy distribution across different zones and voltage levels, even in the event of faults, thereby improving the reliability and cost-effectiveness of the energy supply.
Implementation Method 1
a first winding system for feeding a first DC voltage bus (11) with electrical energy and a second winding system for feeding a second DC voltage bus (12) with electrical energy
Data Source
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AI summary
The invention relates to an energy supply system (100) for a water-bound device (101) and to an operating method, the water-bound device (101) having a first zone (31) and a second zone (32), said system comprising: a first DC voltage bus (11) for a first DC voltage and a second DC voltage bus (12) for a second DC voltage; a first energy source (21) and a second energy source (22), the first energy source (21) being provided in the first zone (31) for supplying at least one DC voltage bus (11, 12) of the at least two DC voltage buses (11, 12) and the second energy source (22) being provided in the second zone (32) for supplying at least one DC voltage bus (11, 12) of the at least two DC voltage buses (11, 12), at least part of the energy supply system (100) being structured in a zone-dependent manner.