Lightning Arrester Electrode Configuration for Charge Region Control
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Solution Overview
Problem
Conventional lightning protection systems are ineffective in minimizing the positive charge region around the arrester, leading to potential lightning strikes on the lower electrode body, necessitating a reduction in this region to enhance suppression efficiency.
Innovation Solution
A lightning suppression type arrester configuration featuring an inner electrode body grounded and surrounded by an outer electrode body with an electrical insulating layer, where the inner electrode body is rod or cylindrical shaped and the outer electrode body is cylindrical, ensuring almost complete coverage and maintaining an electrically insulated state, with a support system to manage the outer electrode body's position and charge distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single lower electrode body is grounded to suppress lightning, then lightning suppression effect is improved, but the positive charge region becomes too large causing lightning strikes on the lower electrode body
Solution Approach 1:
The electrode body is divided into an inner electrode body and an outer electrode body that are electrically insulated from each other. The inner electrode body is grounded to collect positive charge, while the outer electrode body surrounds it to limit the extent of the positive charge region, preventing lightning strikes on the lower structure.
Solution Approach 2:
The inner electrode body is placed inside the outer electrode body, creating a nested configuration. This nested structure allows the inner electrode to collect charge while the outer electrode contains the electric field, effectively limiting the positive charge region and preventing lateral lightning strikes.
2Ease of manufacture
If the inner electrode body is completely exposed, then manufacturing is simpler, but the positive charge region expands increasing lightning risk
Solution Approach 1:
The outer electrode body is designed to surround the inner electrode body, creating a protective enclosure. This nested configuration limits the exposure of the inner electrode while maintaining manufacturing feasibility through standardized cylindrical or rod-shaped components.
Solution Approach 2:
The outer electrode body acts as a shell structure that encloses the inner electrode. This shell configuration effectively contains the electric field and limits the positive charge region without requiring complex manufacturing processes, as it can be implemented as a simple cylindrical or tubular structure.
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
This configuration significantly reduces the positive charge region, effectively suppressing upward streamer generation and enhancing lightning suppression, while simplifying the structure, reducing weight, and improving manufacturability.
Implementation Method 1
an electrical insulating layer provided in the gap to hold the inner electrode body and the outer electrode body in an electrically insulated state
Implementation Method 2
the outer electrode body disposed via the insulator is negatively charged by an action of a capacitor
Implementation Method 3
an opposite charge (positive charge) is distributed on the surface of the ground, and a positive charge is collected on the grounded lower electrode body
Data Source
AI summary
A region of a positive charge formed around an arrester is made as small as possible to effectively suppress generation of an upward streamer. An inner electrode body to be grounded, an outer electrode body provided to surround the inner electrode body with a predetermined gap, an electrical insulating layer provided in the gap to hold the inner electrode body and the outer electrode body in an electrically insulated state, and a support that supports at least one of the inner electrode body and the outer electrode body are included, in which the inner electrode body is formed in a rod shape, and the outer electrode body is formed in a cylindrical shape.