Plasma Generation Element for Arc Elimination
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Solution Overview
Problem
Existing arc elimination systems face challenges with main electrodes positioned at shorter clearances, leading to unwanted operations and false tripping due to contaminants or air impedance, while longer clearances result in insufficient plasma spread, compromising reliability and meeting basic insulation level (BIL) standards.
Innovation Solution
An arc elimination system with a plasma generation element physically coupled to main electrodes, featuring nozzles that direct ablative plasma to multiple electrodes, allowing for longer clearances while ensuring effective arc elimination and scalability across different voltage levels, eliminating the need for surge arresters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clearance between main electrodes is reduced to provide effective plasma spread, then the plasma can reach all main electrodes reliably, but unwanted arc formation occurs due to contaminants or air impedance leading to false tripping
Solution Approach 1:
A plasma generation element is introduced as an intermediary device between the main electrodes. This element generates plasma that actively bridges the dielectric gap, mediating the connection between electrodes and enabling reliable arc elimination without requiring the electrodes to be in direct proximity, thus avoiding unwanted arc formation from contaminants
Solution Approach 2:
The patent replaces the mechanical/physical proximity-based plasma spread mechanism with a controlled plasma generation mechanism. Instead of relying on passive plasma diffusion through air gaps (which is affected by contaminants and distance), an active plasma generation element creates and directs plasma to bridge gaps reliably, substituting the mechanical arrangement with a controlled physical process
2Object-affected harmful factors
If the clearance between main electrodes is increased to avoid false tripping, then unwanted arc formation is reduced, but the plasma spread becomes insufficient to reach all main electrodes
Solution Approach 1:
The plasma generation element serves as a mediator that enables the system to overcome the limitation of increased clearance. By introducing this active plasma source, the system can maintain electrode clearances large enough to avoid false tripping while still achieving effective plasma bridging through the mediator's directed plasma output
3Reliability
If main electrodes are positioned at shorter clearances, then effective plasma spread is achieved, but the system becomes sensitive to contaminants and air impedance causing unwanted operation
Solution Approach 1:
The plasma generation element acts as a buffer or intermediary that decouples the relationship between electrode proximity and plasma spread effectiveness. This allows the system to maintain stable operation under varying environmental conditions by using the controlled plasma generation mechanism rather than relying on direct electrode proximity, thereby improving adaptability
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 system effectively bridges dielectric gaps between main electrodes, ensuring reliable arc elimination and meeting BIL standards by directing ablative plasma efficiently over longer distances, enhancing system reliability and scalability across varying voltage levels.
Implementation Method 1
A plasma generation element is provided and may be configured to generate ablative plasma
Implementation Method 2
generate ablative plasma
Data Source
AI summary
An apparatus is provided. The apparatus includes a plasma generation element physically coupled to a first main electrode. The plasma generation element includes at least a first open end and a second open end. Each open end defines a nozzle such that the first open end directs an ablative plasma to a second main electrode and the second open end directs the ablative plasma to a third main electrode.