Insulator Corona Suppression via Integrated Annular Dielectric Layer
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Solution Overview
Problem
Corona discharge in high voltage equipment leads to power wastage and hardware deterioration, and existing solutions like corona rings require special sizing and positioning, complicating installation and increasing costs.
Innovation Solution
A corona suppression system using annular electrically insulating layers, typically made of room temperature vulcanizing silicone, is integrated into the insulator assembly to reduce ionization and suppress corona generation, eliminating the need for corona rings by positioning dielectric material at high ionization areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If corona rings are used to suppress corona discharge, then corona discharge is prevented or reduced, but device complexity and installation difficulty increase due to special sizing and positioning requirements
Solution Approach 1:
The patent integrates the corona suppression function directly into the insulator assembly by incorporating an annular electrically insulating layer at the interface between the insulator and the end fitting. This merges the insulator and corona suppression components into a single integrated structure, eliminating the need for separate corona rings and their complex installation procedures.
Solution Approach 2:
The annular electrically insulating layer acts as an intermediary component between the insulator body and the metal end fitting. This intermediate layer modifies the electric field distribution at the critical interface region, suppressing corona discharge without requiring external corona rings.
2Object-affected harmful factors
If corona rings are used to suppress corona discharge, then corona discharge is prevented or reduced, but manufacturing cost increases due to additional components and special positioning requirements
Solution Approach 1:
The corona suppression function is merged into the insulator manufacturing process itself. The annular electrically insulating layer is incorporated as an integral part of the insulator assembly during manufacturing, eliminating the need for separate corona ring components and their associated procurement, storage, and installation costs.
Solution Approach 2:
The insulator assembly becomes self-sufficient for corona suppression through the integrated annular insulating layer. The structure automatically provides corona suppression functionality as part of its basic design, without requiring additional expensive components or specialized installation procedures.
3Ease of manufacture
If traditional insulator assembly is used without corona suppression, then manufacturing is simpler, but corona discharge causes power wastage and hardware deterioration
Solution Approach 1:
The patent modifies the electrical parameters at the critical interface region by introducing the annular electrically insulating layer. This changes the electric field distribution and potential gradient at the insulator-end fitting interface, preventing corona discharge and the associated energy losses while maintaining manufacturing simplicity.
Solution Approach 2:
The patent addresses the harmful effect of corona discharge by converting the potential problem area (the insulator-end fitting interface) into a beneficial corona suppression zone through the strategic placement of the annular insulating layer, thereby preventing energy loss without complicating manufacturing.
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 suppresses corona discharge, reduces ionization, and simplifies installation by eliminating the need for corona rings, thereby enhancing electrical performance and reducing costs.
Implementation Method 1
The role of the corona ring is to distribute the electric field gradient and lower its maximum values below the corona threshold
Implementation Method 2
The high electric field ionizes the air, making it conductive, and allowing current to leak from the conductor into the air in the form of ions
Implementation Method 3
Corona discharge is a leakage of electric current into the air adjacent high voltage conductors
Implementation Method 4
An annular electrically insulating layer is on the first cement layer and extends between the first insulator and an outer annular edge of the first end fitting
Data Source
AI summary
An insulator system includes an insulator assembly including: a first insulator; a second insulator; a first end fitting at a first end portion of the first insulator; a second end fitting at a second end portion of the first insulator; a third end fitting at a first end portion of the second insulator and operatively coupled to the second end fitting; a fourth end fitting at a second end portion of the second insulator; a first cement layer between the first insulator and the first end fitting; a second cement layer between the first insulator and the second end fitting; a third cement layer between the second insulator and the third end fitting; and a fourth cement layer between the second insulator and the fourth end fitting. An electrically insulating layer is on the first cement layer and extends between the first insulator and the first end fitting.