Fire extinguishing system and method suitable for ultrahigh voltage converter station and ultrahigh voltage converter station

Abstract

The invention discloses a fire extinguishing system and method suitable for an ultrahigh voltage converter station and the ultrahigh voltage converter station. The fire extinguishing system comprisesa spray fire extinguishing system and a fire monitor fire extinguishing system, the spray fire extinguishing system comprises first fire pipelines and spray pipes, and the fire monitor fire extinguishing system comprises second fire pipelines and fire monitors. One fire monitor is arranged over each of fire walls on two sides of each converter transformer in the ultrahigh voltage converter station, each fire monitor communicates with one second fire pipeline, one spray pipe is arranged on each of the fire walls on two sides of each converter transformer, each spray pipe communicates with one first fire pipeline, and the fire monitors and outlets of the first fire pipeline spray pipes at the position of each converter transformer right face the converter transformer. The fire extinguishingsystem and method have the advantages of overcoming the shortcomings and defects of an existing fire extinguishing system design and realizing efficient and reliable fire fighting.

Description

technical field [0001] The invention relates to the field of ultra-high voltage, and more specifically relates to a fire extinguishing system and a fire extinguishing method applicable to an ultra-high voltage converter station and the ultra-high voltage converter station. Background technique [0002] UHV DC transmission is one of the most advanced power transmission technologies in the world. my country has become a major DC power country in the world and leads the development of UHV DC transmission technology. On January 11, 2016, construction of the ±1100kV UHV DC transmission project in Zhundong-Wannan (Changji, Xinjiang-Xuancheng, Anhui) started. This is currently the UHV power transmission project with the highest voltage level, the largest transmission capacity, the longest transmission distance, and the most advanced technology in the world. [0003] The UHV converter station is an important part of the power grid. It undertakes the national power transmission task...

AI Technical Summary

Problems solved by technology

[0006] Domestic research on transformer fire extinguishing technology mostly focuses on conventional transformers, and the fire extinguishing methods stay in the more traditional methods of water mist and foam spray. The application of new technologies such as compressed air foam and other high-efficiency water-based fire extinguishing technologies lags behind foreign countries, and there is no such thing as yet. Research on the fire extinguishing technology system of large-scale converter transformers in newly-built UHV converter stations with complex structures such as BOX-IN, the applicability of various fire extinguishing technologies to UHV converter transformers is not yet clear

[0007] To sum up, it is difficult for the fire extinguishing system installed in the current converter station to completely cover the special fire behavior of the converter station.

The following problems exist in the fire extinguishing system of the converter transformer area of ​​the converter station: ①The fire extinguishing system of the converter transformer area of ​​all the current converter stations in operation is a water spray fire extinguishing system or a foam spray fire extinguishing system. Accidents and related studies have shown that this It is difficult for the two systems to completely cover all fire characteristic behaviors of UHV converters; ② only a single set of fire extinguishing system is arranged in the converter area, insufficient consideration is given to system redundancy, and the system reliability is low; ③ the terminal release device of the current converter station fire extinguishing system is The pressure sprinklers are arranged in the area around the converter transformer, and do not have any anti-explosion impact capability. When an explosion occurs, it may directly lead to system failure; ④ The accident shows that the converter transformer riser and bushing are high fire risk parts. The system does not add any additional protective measures to the area; ⑤The current fire extinguishing system does not have a clear system response time, and responds to the requirements of the principle, creating conditions for the initial development of fires

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