Guard Ring Mounting Plate for High-Voltage Insulator Protection
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Solution Overview
Problem
High-voltage transmission lines without guard rings face challenges in protecting insulators from flashovers and the corona effect, as existing solutions require costly and impractical replacement of existing components, especially on live lines.
Innovation Solution
A device comprising a fastening/support plate with U-Bolts and protection rackets that can be easily and quickly installed on existing high-voltage transmission lines, allowing for secure anchoring and protection without detaching conductors, suitable for live line installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guard rings are installed on existing high-voltage transmission lines, then protection against flashovers and corona effect is improved, but installation complexity and cost increase due to requirement of detaching conductors and replacing spacing yokes
Solution Approach 1:
The invention divides the protection system into separate components: the existing spacing yoke remains in place, and the guard ring is installed as an independent additional component. This segmentation allows the guard ring to be installed without removing or replacing the original spacing yoke, thereby reducing installation complexity while maintaining protection effectiveness.
Solution Approach 2:
The guard ring is designed to be nested around the existing spacing yoke structure. The guard ring encompasses the yoke in a concentric arrangement, allowing both components to coexist in the same spatial envelope. This nesting approach enables installation of protection without disrupting the existing structural framework.
2Reliability
If guard rings are installed on existing high-voltage transmission lines, then protection against flashovers and corona effect is improved, but operational disruption increases due to need for de-energization
Solution Approach 1:
The guard ring is designed with pre-formed attachment structures that can be connected to the existing spacing yoke without requiring hot work or complex assembly procedures. The U-shaped cross-section and integrated attachment means allow for rapid installation that minimizes the window of required de-energization, enabling the work to be completed in a single brief operational disruption.
3Adaptability or versatility
If custom alternative assemblies are designed to interface with existing chain sockets, then compatibility with existing structures is improved, but manufacturing cost increases significantly
Solution Approach 1:
The guard ring is designed with a universal attachment system that can interface with multiple types of existing spacing yokes and chain structures. The U-shaped cross-section and standardized attachment means provide a multi-functional solution that adapts to various existing configurations without requiring custom-designed alternative assemblies for each specific case, thereby reducing manufacturing costs while maintaining compatibility.
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 provides effective protection against flashovers and the corona effect while being cost-effective and easy to install, maintaining operational continuity without the need for extensive de-energization or custom component design.
Implementation Method 1
the use of so-called 'guard rings' to be applied to the bottom of the chain of insulators has long been known. These guard rings have the function of improving the distribution of the electric load on the insulators, i.e. of reducing electrical field irregularities on the first insulators on the line side
Implementation Method 2
The corona effect is also known, produced by abnormal increments of the electric field. Such phenomenon is due to high electric loads and manifests itself on the first insulators of the chains, on the line side
Data Source
AI summary
Device for the protection from effects of an electric field, of the metal parts of chains of insulators of already mounted and operational high-voltage transmission lines includes:a fastening/support plate;anchoring elements to anchor the plate to the suspension yoke of the conductors of the transmission line, the anchoring elements being adjustably mounted on the plate according to at least two degrees of freedom; andat least one guard ring, which may be anchored on the plate with fastening elements. The plate has an upturned-U cross-section and its upper surface is formed by geometrically coupling with the lower surface of the suspension yoke. The anchoring elements include a pair of arms articulately, mounted on the plate; such articulation including, for each arm, a pin pivotally, mounted within seats formed in the plate perpendicularly to the longitudinal axis thereof, and a pair of holes running through the pin.