HVDC Disconnector With Tulip Contacts And Segmented Guide
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Solution Overview
Problem
High Voltage Direct Current (HVDC) transmission systems face challenges in efficiently managing increased power capacity and pollution effects, particularly in maintaining reliable electrical connections and preventing arcing between contacts in knee-type disconnectors.
Innovation Solution
The design incorporates a knee-type HVDC disconnector with tulip contacts and a movable contact system, featuring a guide and conducting members that allow for efficient heat dissipation and protection against pollution, along with an arcing contact element to prevent arcing during engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If composite insulators are used to handle increased power capacity, then the ability to handle power capacity is improved, but the need for larger contact areas and greater ability to handle pollution increases device complexity
Solution Approach 1:
The fixed contact is segmented into multiple conducting members (first conducting member and second conducting member) positioned in the guide, allowing the contact system to handle increased power capacity through distributed contact areas rather than requiring a single large contact surface
Solution Approach 2:
The patent transitions from traditional single-plane contacts to a three-dimensional arrangement where conducting members are positioned vertically in the guide, utilizing the vertical dimension to increase effective contact area without increasing horizontal footprint
2Object-affected harmful factors
If separated contacts are used to address pollution effects, then pollution resistance is improved, but the number of components and structural complexity increases
Solution Approach 1:
The contact system is segmented into separated fixed conducting members within the guide, creating multiple isolated contact points that prevent pollution from bridging across contacts, thereby improving pollution resistance while maintaining a compact structure
Solution Approach 2:
The conducting members are nested within the guide structure, with the guide providing both mechanical support and electrical isolation, effectively combining multiple functions (structural support, contact guidance, pollution protection) into a single integrated component
3Volume of moving object
If knee-type disconnectors are used to reduce distance between adjacent poles, then space occupation is reduced, but the risk of arcing between contacts during engagement increases
Solution Approach 1:
The guide acts as an intermediary structure that controls the movement and alignment of conducting members during engagement, ensuring proper positioning before electrical contact is made, thereby preventing arcing while maintaining the compact knee-type configuration
Solution Approach 2:
The guide structure pre-positions the conducting members in alignment before engagement occurs, performing the preliminary action of alignment to prevent misalignment-induced arcing during the closing operation
Data Source
AI summary
A HVDC disconnector is disclosed. The HVDC disconnector comprises a fixed contact comprising a guide and a pair of conducting members positioned in the guide wherein the first and second conducting members are both tulip contacts; a movable contact comprising a fixed arm and a mobile arm having a conducting terminal, wherein the mobile arm is movable from an open position to a closed position to close a connection between the fixed contact and the second contact.