Insulated Busbar Cover Structure for Circulation Current Damping
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Solution Overview
Problem
Existing phase-insulated medium voltage busbar systems experience circulation currents, leading to increased temperature and voltage induction, posing safety risks due to the need for grounding and lack of effective current damping.
Innovation Solution
An additional cover structure is introduced, comprising conductive busbars with insulation material and a metal cover, allowing for natural damping of circulation currents by crossing insulated conductors at joint points, thereby preventing temperature increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grounding is implemented to enable circulation current flow, then current damping is achieved, but temperature increase and safety risks occur
Solution Approach 1:
The patent introduces an additional cover structure with cross-connecting conductors that act as an intermediary element. These conductors are positioned at joint points of phase-insulated medium voltage busbars and are electrically isolated from the busbar bodies by insulation material. This intermediary structure provides a path for circulation currents without requiring direct grounding of the busbar bodies, thereby damping currents while minimizing temperature increase.
2Reliability
If additional cover structure with cross-connecting conductors is added, then circulation current damping is achieved, but device complexity increases
Solution Approach 1:
The additional cover structure serves multiple functions simultaneously: it provides mechanical protection for the busbar system, establishes cross-connecting paths for circulation currents through integrated conductors, and maintains electrical insulation through incorporated insulation material. By combining these functions into a single multi-functional component, the patent reduces overall system complexity compared to implementing separate elements for each function.
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
The solution effectively minimizes circulation currents and temperature rise, enhancing safety by providing natural damping and insulation, thus reducing the need for grounding.
Implementation Method 1
A cast resin (2) is formed as the insulation material to provide insulation between the said conductive busbar (1) and the metal busbar body (4)
Implementation Method 2
A crossing busbar (5), which allows 3 metal busbar bodies (4) to be crossed for the natural damping of circulation currents
Implementation Method 3
An additional cover (7) is positioned as a metal cover that carries the crossing busbars (5) covered with insulation material (6), protects them against external influences
Data Source
AI summary
Disclosed is an additional cover structure for phase insulated medium voltage busbar systems, which provides damping of the circulation currents occurring in the body of medium voltage busbar systems used in industrial facilities and factories.