ROV Power Line Energy Buffering for Peak Load Flexibility
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Solution Overview
Problem
The transmission line used in Remotely Operated Vehicles (ROVs) becomes heavy and stiff as power transmission increases, hindering the ROV's movements due to the weight and stiffness requirements for higher power transmission, which is not efficiently managed by existing energy management systems.
Innovation Solution
An energy management system that includes an electrical energy generating unit, a wire-guided ROV, and an electrical energy storage device along the transmission line or on board the ROV, allowing for a flexible transmission line by generating and transmitting electrical power slightly higher than the average absorbed power, with the storage device compensating for the difference between generated and absorbed power, using rechargeable batteries and capacitors to optimize power delivery and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the transmission line power capacity is increased to meet peak power demands, then the power supply capability is improved, but the weight and stiffness of the transmission line increase, hindering ROV movements
Solution Approach 1:
The system performs preliminary action by charging the energy storage device during periods when power demand is low (below the first threshold), so that energy is stored in advance and can be discharged when power demand exceeds the transmission line's capacity, eliminating the need to oversize the transmission line for peak demands
Solution Approach 2:
The energy storage device acts as an intermediary between the power generation unit and the ROV load. It buffers the mismatch between generated power and absorbed power, allowing the transmission line to be sized for average power rather than peak power, thus reducing weight while maintaining power supply capability
2Power
If the transmission line power capacity is increased to meet peak power demands, then the power supply capability is improved, but the stiffness of the transmission line increases, hindering ROV movements
Solution Approach 1:
The system performs preliminary action by charging the energy storage device during periods when power demand is low (below the first threshold), so that energy is stored in advance and can be discharged when power demand exceeds the transmission line's capacity, eliminating the need to oversize the transmission line for peak demands
Solution Approach 2:
The energy storage device acts as an intermediary between the power generation unit and the ROV load. It buffers the mismatch between generated power and absorbed power, allowing the transmission line to be sized for average power rather than peak power, thus reducing stiffness and improving flexibility
3Ease of manufacture
If the generating unit power is reduced to use commercial components, then cost-effectiveness is improved, but the power supply capability during peak demand is insufficient
Solution Approach 1:
The system performs preliminary action by charging the energy storage device during periods when power demand is low (below the first threshold), so that energy is stored in advance and can be discharged when power demand exceeds the transmission line's capacity, enabling the use of smaller, more cost-effective generating units
Solution Approach 2:
The system merges the power supply function of the generating unit with the energy storage function of the energy storage device. This combination allows the generating unit to be sized for average power (using commercial components) while the energy storage device supplements power during peak demands, achieving both cost-effectiveness and adequate power supply capability
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 reduces the constraints on power generating units, transmission lines, and storage devices, allowing for the use of commercial components, enhancing performance while maintaining cost-effectiveness, and facilitating smoother ROV movements by optimizing the weight and flexibility of the transmission line.
Implementation Method 1
an electrical energy storage device located along the transmission line and/or on board the ROV
Implementation Method 2
using rechargeable batteries and capacitors to optimize power delivery and storage
Data Source
AI summary
An energy management system of a Remotely Operated Vehicle (“ROV”) has a generating unit located in a remote station on a water body and configured to generate a generated electrical power with a first maximum value); a ROV configured to operate in the water body and configured to absorb a second maximum value of an absorbed electrical power greater than the first maximum value; an electrical energy transmission line connected to the generating unit and to the ROV; and an electrical energy storage device located along the transmission line and/or on board the ROV.