High Voltage Cable Joint Offset Bore Connector Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High voltage power cable joints experience electrical breakdown due to pressure loss and increased gap length between the connector and electrical insulation system, caused by the deformation of conductors and misalignment of the connector, leading to a higher risk of electrical failure.
Innovation Solution
A high voltage power cable joint device with an elongated conductive connector featuring offset bore sections and through-openings that allow fasteners to press conductors towards the center, reducing the step size and gap length between the connector and electrical insulation system, thereby enhancing the electrical withstand strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If screws are arranged on one side of the connector to attach conductors, then the attachment process is simplified, but the connector becomes misaligned and creates a larger step between the connector and electrical insulation system surface
Solution Approach 1:
The connector is divided into multiple segments or sections, with attachment points distributed around its circumference rather than concentrated on one side. This segmentation allows the conductor to be attached while maintaining the connector's central alignment with the electrical insulation system.
Solution Approach 2:
The connector design incorporates asymmetric features where the attachment mechanism is integrated into the connector body in a way that compensates for the asymmetric loading from single-sided screw attachment, preventing misalignment and step formation.
2Strength
If the connector is pressed downwards by screws, then the conductors are securely attached, but the gap length between the connector and electrical insulation system increases
Solution Approach 1:
The connector incorporates counterbalancing structural features that offset the downward pressing force from the screws. This counterweight mechanism prevents the connector from displacing downward, thereby maintaining minimal gap length while still securing the conductors effectively.
Solution Approach 2:
The attachment mechanism is designed to distribute the securing force in multiple dimensions rather than purely in the vertical direction. This multi-dimensional approach allows strong conductor attachment without creating excessive downward pressure that would increase the gap length.
3Adaptability or versatility
If the step between connector and electrical insulation system is large, then the conductor attachment is more tolerant of misalignment, but the pressure loss section length increases and electrical breakdown risk increases
Solution Approach 1:
The connector design implements local quality variations where specific regions have enhanced alignment features or compensatory structures that tolerate conductor misalignment locally without affecting the overall pressure distribution or creating extended low-pressure sections that would compromise electrical reliability.
Data Source
AI summary
The present disclosure relates to a high voltage power cable joint device including: an elongated conductive connector having a first and second end faces, a field control body having a first semiconducting layer arranged circumferentially around the entire connector, and extending beyond the end faces, wherein the first and second end faces are provided with first and second bore sections which extend parallel with and are arranged offset from the central axis of the connector. The connector has an outer surface that has a first and second outer portions where the connector wall is generally the thinnest towards the first and second bore sections. Furthermore, the connector has a straight first through-opening which extends from the first outer surface portion to the first bore section, wherein a straight second through-opening is axially displaced from the first through-opening and extends from the second outer surface portion to the second bore section. There is also disclosed a high voltage power cable including a high voltage power cable joint device.