UHV Converter Transformer Fire Protection With Dual Spray and Monitor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current fire extinguishing systems in UHV converter stations are inadequate in covering all fire characteristics and behaviors of converter transformers, lack system redundancy and reliability, fail to protect against explosive impacts, and do not provide specific response times or protective measures for critical components like the bushing and lifting seat.
Innovation Solution
A dual fire extinguishing system comprising a spray fire extinguishing system and a fire monitor-based system, with each system connected to separate generation subsystems and control modules, ensuring comprehensive coverage and redundancy, and utilizing compressed air foam (CAF) to enhance protection and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single fire extinguishing system is used, then the system structure is simple, but the system reliability and coverage are insufficient
Solution Approach 1:
The fire extinguishing system is divided into two independent subsystems: a spray fire extinguishing system and a fire monitor-based system. Each subsystem has its own fire pipe network and extinguishing medium generation subsystem, allowing them to operate independently and provide redundant coverage. This segmentation resolves the contradiction by improving reliability through duplication while maintaining manageable complexity through modular design.
Solution Approach 2:
Different regions of the converter transformer are protected by different extinguishing mechanisms tailored to local fire characteristics. The spray system targets the lower portion and surrounding areas where oil fires are most likely to occur, while the fire monitor targets the upper portion and critical components like the bushing. This local differentiation improves overall system reliability without requiring a uniformly complex structure throughout.
2Adaptability or versatility
If conventional fire extinguishing means are used, then the system is easy to implement, but it cannot cover all fire characteristics and behaviors of converter transformers
Solution Approach 1:
The dual fire extinguishing system provides multi-functional coverage by combining spray extinguishing for oil fires, foam suppression for electrical fires, and high-position monitoring for comprehensive protection. This universal approach covers all fire characteristics (oil fires, electrical fires, and fires in different locations) that conventional single-system approaches cannot address, resolving the adaptability-contradiction.
3Speed
If the fire extinguishing system components are located close to the converter transformer, then the response time is fast, but the system is vulnerable to explosive impact
Solution Approach 1:
The fire extinguishing medium (compressed air foam) is pre-generated and stored in ready-to-discharge containers positioned at safe distances from the converter transformer. The foam proportioning devices and storage tanks are located in protected areas away from explosion zones, yet the system maintains fast response capability through pre-positioned piping and automated activation. This beforehand cushioning resolves the contradiction by protecting vulnerable components while maintaining rapid response through advance preparation.
4Reliability
If critical components like bushing and lifting seat are not specifically protected, then the system structure is simple, but the fire risk to these components is high
Solution Approach 1:
The fire monitor-based system specifically targets critical components like the bushing and lifting seat with dedicated nozzles and positioning. These components are in the upper portion of the transformer where oil accumulation is less likely but electrical fires and component failures are more critical. The localized protection approach improves component reliability without requiring a complete redesign of the entire system.
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 dual system effectively covers all fire characteristics and behaviors of UHV converter transformers, provides redundancy for reliable operation, protects against explosions, and ensures rapid response times, minimizing damage from high-energy impacts.
Implementation Method 1
utilizing compressed air foam (CAF) to enhance protection and reliability
Implementation Method 2
a spray fire extinguishing system... includes a first fire pipe and a spray pipe
Implementation Method 3
a fire monitor-based fire extinguishing system... includes a second fire pipe and a fire monitor
Data Source
AI summary
Disclosed are a fire extinguishing system and method for an ultra-high voltage (UHV) converter station, and a UHV converter station. The fire extinguishing system includes a spray fire extinguishing system and a fire monitor-based fire extinguishing system, where the spray fire extinguishing system includes a first fire pipe and a spray pipe; the fire monitor-based fire extinguishing system includes a second fire pipe and a fire monitor; one fire monitor is disposed right above a firewall on both sides of each converter transformer in the UHV converter station, and each fire monitor is connected to one second fire pipe; a spray pipe is disposed on the firewall on both sides of each converter transformer; and the fire monitor corresponding to each converter transformer, and an outlet of the spray pipe connected to the first fire pipe corresponding to each converter transformer face the converter transformer.