Segmented Wye-Ring Replacement for In-Situ Wind Turbine Repair
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Solution Overview
Problem
The existing methods for replacing a faulty Wye-ring in wind turbine generators are costly and time-consuming, requiring the entire generator to be removed from the turbine tower, which leads to significant downtime and high expenses due to the need for crane services and complex reassembly processes.
Innovation Solution
The method involves replacing the Wye-ring in situ by dividing it into three arcuate sections that can be welded or brazed onto the existing cup arms, allowing for installation without removing the generator from the tower, and using insulating materials to secure the new ring, reducing stress and extending its service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the entire generator is removed from the turbine tower for Wye-ring replacement, then the repair can be performed, but the downtime and cost increase significantly
Solution Approach 1:
The Wye-ring is divided into three separate arcuate sections that can be installed independently. This segmentation allows the sections to be installed through the stator without requiring complete generator disassembly or removal from the turbine tower, enabling in-situ repair and significantly reducing turbine downtime.
2Ease of repair
If the entire generator is removed from the turbine tower for Wye-ring replacement, then the repair can be performed, but the cost increases due to crane services and reassembly
Solution Approach 1:
The Wye-ring is divided into three separate arcuate sections that can be installed independently. This segmentation allows the sections to be installed through the stator without requiring complete generator disassembly or removal from the turbine tower, enabling in-situ repair and significantly reducing turbine downtime.
3Reliability
If a single continuous Wye-ring is used, then the electrical connection is maintained, but stress concentration causes fatigue and cracking
Solution Approach 1:
The Wye-ring is divided into three separate arcuate sections that can be installed independently. This segmentation allows the sections to be installed through the stator without requiring complete generator disassembly or removal from the turbine tower, enabling in-situ repair and significantly reducing turbine downtime.
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 approach reduces downtime and costs associated with repairs by enabling on-site replacement, minimizing the need for crane services and allowing for planned maintenance, while also potentially increasing the service life of the replacement ring by distributing stress more evenly.
Implementation Method 1
The ends of the arcuate sections are formed into cup arms or are otherwise adapted for welding or brazing in place to replace a faulty Wye-ring
Implementation Method 2
The ends of the arcuate sections are formed into cup arms or are otherwise adapted for welding or brazing in place to replace a faulty Wye-ring
Data Source
AI summary
Methods for replacing a Wye-ring of a wind turbine generator preferably, but not necessarily, in-situ are described along with a combination of three arcuate Wye-ring sections that when assembled comprise a Wye-ring. The method after gaining access to the Wye-ring typically comprises: removing all or most of the damaged Wye-ring; installing the replacement sections typically by welding or brazing them in place; insulating the new ring; installing new blocking; and adhesively securing the new blocking in place.