Application of sulfur hexafluoride gas leakage monitoring and alarm system in 35KV switch room of Mazong Wind Farm

韦弗斯解决方案

应用案例

SF6安全保障专家

专注于SF6气体检测的专业化

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Application of sulfur hexafluoride gas leakage mon

Huaneng Huili Mazong and Sandi Wind Farm is located in Huili County, Liangshan Prefecture, with an altitude of about 2750-3640m. SF6 circuit breakers used by 4 switchgear in the 35kV switch room of Huili Sandi Wind Farm are not installed with sulfur hexafluoride gas leakage monitoring and alarm system. SF6 circuit breakers used by 2 switch cabinets in 35kV switch room of Huili Mazong Wind Farm are not installed with SF6 gas online monitoring devices at present, which has the risk of SF6 gas leakage. In order to ensure the safety of wind farm operation and maintenance personnel and ensure the safe and reliable operation of equipment, Currently, the project of adding sulfur hexafluoride gas leakage monitoring and alarm system to the 35kV switch room of Huaneng Huili Wind Farm in three places and Huaneng Huili Mazong Wind Farm is carried out.

Main technical requirements

1) According to the nature of wind farms in Sandi and Mazong, and combined with the relevant requirements of wind farms, the sulfur hexafluoride gas leakage monitoring and alarm system is installed in the 35kV switch room, which is mainly used to detect the gas easily leaked in the air (important components: SF6 and O2). When the concentration of the gas to be measured in the environment is monitored to reach or exceed the early warning alarm value, the alarm will issue a sound and light alarm to remind the wind farm operation and maintenance personnel to take safety measures in time, and drive the peripheral fan to prevent the occurrence of accidents such as explosion, fire, and poisoning, so as to protect the safety of life and property and promote the safe production in the work area.

2) The technical transformation plan is as follows: Remove the original exhaust pipe, fan and circuit in the 35kV switch room; Under the window next to the cable well, avoid the load-bearing structure of the house, open the fan hole according to the code, repair and smooth the civil construction, paint according to the requirements, and install the fan; According to the gas properties of sulfur hexafluoride, combined with the actual situation of the site, the sulfur hexafluoride leak monitoring and alarm system is configured, including SF6 quantitative leak alarm system host, SF6 and O2 double gas analysis system host, SF6 and O2 double gas sampling system host, SF6 and O2 double gas sampling probe, sound and light alarm, temperature and humidity sensor. Fan operating cabinet, fan controller, etc., alarm probe and pipeline use PVC cable trough to walk along the foot line, the host is arranged at a height of 1.2-1.5 meters above the ground, mainly in line with the standard, beautiful, safe and easy to operate, wire and other materials choose flame retardant wire; Power on trial operation according to the standard, completion acceptance.

The sulfur hexafluoride gas leakage monitoring and alarm system installed in the two 35KV SVG switch rooms of Mazon and Huili mainly detects the SF6 gas concentration and oxygen content in the switch room. When the SF6 gas content exceeds the standard or there is no oxygen in the environment, the system can give a real-time alarm and automatically open the fan for ventilation. And has temperature and humidity detection, working state voice prompt, remote alarm, historical data query and many other rich functions. Its unique trace SF6 gas detection technology can detect 1000ppm concentration of SF6 gas, which can not only achieve the purpose of ensuring personal safety, but also ensure the normal operation of the equipment; Imported highly stable oxygen sensors can provide more reliable protection for field workers.