Integrated Projectile Barrier for Air Core Reactor Survivability
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Solution Overview
Problem
Current security measures for substations, particularly air core reactors, are inadequate in protecting against projectile attacks, which can disrupt the reliability of Bulk-Power Systems and lead to instability or cascading failures.
Innovation Solution
An integrated projectile barrier comprising an outer binding layer, a middle fragmentation layer, and an inner absorption layer is attached directly to the outer surface of the air core reactor's coil, providing a sacrificial layer to disperse and absorb projectile energy, ensuring continued operation after a threat is neutralized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional perimeter protection and wall shielding are used for substations, then general security is improved, but specific protection against projectile attacks on critical equipment like air core reactors remains insufficient
Solution Approach 1:
The barrier is divided into three distinct functional layers: outer binding layer for structural integrity, middle fragmentation layer for disrupting projectile coherence, and inner absorption layer for energy dissipation. This segmentation allows each layer to specialize in a specific aspect of projectile defense, collectively providing comprehensive protection against projectile attacks while maintaining reliability of the air core reactor.
Solution Approach 2:
The barrier employs composite material construction with three different layers having distinct material properties optimized for their specific functions. The outer binding layer provides structural strength, the middle fragmentation layer contains materials that promote projectile disintegration, and the inner absorption layer uses energy-absorbing materials. This composite approach enables the barrier to address multiple attack mechanisms simultaneously, significantly improving protection against projectile threats.
2Reliability
If a sacrificial barrier layer is added to protect the coil, then survivability during attack is improved, but device complexity increases
Solution Approach 1:
The barrier is pre-configured with three functional layers designed to activate in sequence during a projectile attack. The outer binding layer is prepared to engage first, followed by the middle fragmentation layer, and finally the inner absorption layer. This preliminary arrangement of protective measures ensures that when a threat occurs, the system responds automatically and effectively, enabling continued operation after threat neutralization without requiring complex real-time decision systems.
Solution Approach 2:
The barrier is designed as a sacrificial protective element that can be replaced if damaged during an attack. Rather than making the entire air core reactor complex and expensive to protect, a relatively simple and cost-effective barrier is used that absorbs the impact and can be replaced. This approach improves reliability at minimal increase in overall device complexity, as the barrier itself is a standalone replaceable component.
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 integrated projectile barrier effectively enhances the survivability of air core reactors by reducing vulnerability to physical attacks, allowing critical electrical systems to maintain operation despite hostile incidents, thereby stabilizing the Bulk-Power System and preventing cascading failures.
Implementation Method 1
a middle fragmentation layer next to the outer binding layer
Implementation Method 2
an inner absorption layer to sandwich the middle fragmentation layer between the outer binding layer and the inner absorption layer
Data Source
AI summary
An air core reactor for use in an electric power transmission and distribution system or in an electric power system of an electrical plant is provided. The air core reactor comprises an electrically insulated support structure, an outer surface of a coil of windings configured to operate at a potential and isolated to ground or other potentials by the electrically insulated support structure and a projectile resistant cylinder that attaches directly to the outer surface of the coil of windings. The projectile resistant cylinder is configured as an integrated barrier to provide a first measure of survivability to the air core reactor such that the integrated barrier enables a continued operation of equipment after a threat has been eliminated.