Wind Turbine Converter Cabinet Layout for Arc Fault Containment
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Solution Overview
Problem
Wind turbines face challenges with arc faults due to high electrical power and confined spaces, leading to potential destruction of equipment and safety risks, and the need to disconnect the entire turbine from the grid for maintenance is costly and time-consuming.
Innovation Solution
An electric converter system with a first section designed to withstand arc faults, featuring a pressure release mechanism and sealing to direct blasts upwards, allowing safe maintenance without disconnecting from the grid, and a second section for converter components accessible for service while still connected to the grid for auxiliary power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire wind turbine is disconnected from the electric grid for maintenance, then safety risks are reduced, but service time and costs increase significantly
Solution Approach 1:
The patent divides the power cabinet into two separate sections: a first section housing grid connection components with arc fault protection, and a second section housing converter components with serviceable doors. This segmentation allows the converter section to be serviced independently while the grid section remains connected and protected, resolving the contradiction between safety and service time.
2Reliability
If the entire wind turbine is disconnected from the electric grid for maintenance, then safety risks are reduced, but service costs increase due to need for service generators
Solution Approach 1:
By segmenting the power cabinet into protected grid connection section and serviceable converter section, the invention enables converter maintenance while maintaining grid connection. This eliminates the need for expensive service generators, directly addressing the cost issue while preserving safety through arc fault protection in the grid section.
3Object-affected harmful factors
If arc fault protection is implemented with confined space design, then equipment protection is improved, but safety distances for service personnel become difficult to maintain
Solution Approach 1:
The power cabinet is segmented into a first section for grid connection with arc fault protection and a second section for converter components with accessible doors. This allows service personnel to access converter components safely while the grid section maintains arc fault protection, resolving the contradiction between equipment protection and service accessibility.
Solution Approach 2:
The patent introduces an intermediary protective structure (the first section with arc fault protection) that separates the hazardous grid connection area from the serviceable converter area. This intermediary structure enables safe access to converter components while protecting against arc faults, addressing both equipment protection and service accessibility requirements.
4Power
If high electrical power is used in wind turbines, then power generation capability is improved, but arc flash intensity and destruction potential increase
Solution Approach 1:
The patent segments the high-power electrical system into a protected first section for grid connection and a serviceable second section for converter components. The first section incorporates arc fault protection measures that contain and withstand arc flash pressures, enabling high power operation while mitigating arc flash destruction potential.
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 safe and cost-effective maintenance of wind turbine converter systems by containing arc faults within the first section, maintaining grid connection for power supply during service, reducing the need for combustion generators and minimizing service costs.
Implementation Method 1
An arc flash is a complex phenomenon that can happen when for some reason a breakage of insulation between two conductors fails. An arc fault creates an explosion that will develop poisonous gases, pressure waves, intense light, an air temperature increase up to 35.000° F.
Implementation Method 2
An arc fault creates an explosion that will develop poisonous gases, pressure waves, intense light, an air temperature increase up to 35.000° F.
Implementation Method 3
a second electric conductor penetrates a second side wall opposite the first side wall by means of a sealing mechanism of the second side wall
Data Source
AI summary
A wind turbine with an electric converter module having a first section forming a first enclosure capable of withstanding a pressure from an arc flash inside the first enclosure. The first enclosure houses an electric protective device electrically connected between a first electric conductor and the second electric conductor. A second section is arranged adjacent to the second side wall of the first section, and forms a second enclosure housing an electric converter system connected to the second electric conductor and a third electric conductor to allow conversion of electric power from the third electric conductor to electric power to the second electric conductor. A door in the second section serves to allow service personnel to access components of the electric converter system from outside the enclosure.