【 Weak current College 】 on unmanned substation fire protection---Power By 【 China power house network 】

Substation as a whole part of the transmission system, assumed an important role in connecting the transformer substation of fire protection, but also directly affect its ability to run safely. For emergency, fire-fighting system correctly put into operation, implementation of repression and put out the fire at the beginning is very important. With the development of technology and the improvement of the degree of automation, as an important hub for transmission, substation is unattended. This substation safety issues put forward higher requirements.

General substation is a master communication building, 3.5KV distribution Chamber, relays, and other buildings. While these buildings within the engine room, the important distribution indoor devices is the various functions of the Cabinet, as everyone knows, the electric fire is Cabinet safety work of most large fire hazard, so how can you guarantee the safety of the substation?

First, the existing substation fire protection measures

Working principle: the installation of the substation to the fire, smoke detection alarm signal and alarm signal through the network to the dispatch centre, dispatch centre under the status notify personnel arrived at the scene of the use of the site for fire extinguishers.

Problems:

Smoke detector or temperature sensing probe needs to reach a certain level can be achieved. Because smoke or temperature sensor is installed in the top of the room, when smoke or temperature are detected and issued fire means fire has spread from the inside of the Cabinet to Cabinet external, for unit caused a great loss.

Fire fighting slow fire signal transmission to the control center, then from Control Centre issued a directive because the unmanned substation General settings in one place, and wait until the rescuers arrived at the scene for fighting, the fire had spread. Fire paled. Even if you call the fire brigade to the fire, the water on electrical equipment damage may also seriously affected than fire. On devices running the loss is irreversible.

Now in the unmanned substation with emergency power switch function. But once a Cabinet produce fire risk cannot exterminate and immediately spread to other cabinets. The whole substation stops running, incalculable losses.

Due to the high degree of automation equipment, or the presence of some congenital monitoring devices often cause problems, such as instantaneous mass upload some interference signal, serious interference with the monitoring officer's judgement, sometimes inevitably missed out a large amount of information, if you encounter network communications are not clear, the fire cannot and times to the command center for unmanned substation safety run cause interference, and the interference will evolve into expansion caused the accident or incident.

Second, the fire danger

1. substation within the building are brick, fire resistance ratings are secondary, decoration materials are fire safety requirements. Fire hazards mainly electrical fire.

2, electric fire refers to the electrical equipment, electrical circuits, conductors, lightning, static electricity, thermal effect of electric arc, triggered by the fire. If electrical equipment for surface temperature rise may ignite the fires around substance; electrical equipment up and running when the arc or spark of fire caused by substances (or explosion); electrostatic discharge arc, arc lightning discharge, conductor short-circuit the insulated grounding conductors of spontaneous combustion, electric arc, conductor connectors not good heating temperature is too high, the conductor insulation damage or decay caused short circuit so that the temperature is too high fire ignition adjacent material, etc.

Third, the traditional solution

To address the fire caused by electrical equipment, in General, we use a traditional fire-extinguishing system for fire fighting, but the following problems.

Traditional fire extinguishing system can only be protected against the whole room, not for device-to-peer type of fire protection, while traditional fixed gas fire extinguishing system is when the protected object, a fire broke out, the fire had spread out from the device, the room has a lot of smoke and high temperature, followed by the installation in room fire detector receive two separate fire signal automatically starts only after the fire extinguishing system, on the protected object is located in room for extinguishing a fire, but has a large, protected devices has been a lot of damage, so to speak, on the device itself, this type of fire-fighting methods do not resolve the issue of fire fighting equipment.

Whether in full or partially submerged in the system, regardless of the application system is automatic control, manual control or mechanical emergency operation, traditional fixed gas fire extinguishing system is the extinguishing agent is spraying out to protection area (large enclosed spaces), without direct spraying fire-extinguishing agent to the fire of the electronics, electrical equipment. And gas fire extinguishing agent is also very difficult to penetrate these vulnerable to fire in a closed envelope equipment, fire fighting targeted is not strong, to timely and effective fire fighting purposes.

Fire extinguishing system prices relatively high. Because the smaller device when you are in the fire extinguishing agent evenly filled with larger space or room. Need big extinguishant, fire extinguishing system consists of relatively complex, equipment investment and a large fire suppression costs. Particularly in the development of electric power, telecommunications, more quickly, in order to leave enough room for development, the project is a device that works as an extension of the scope for and put into use at the initial stage of a large space of the room only with fewer devices, in order to protect these few sets of smaller devices, set the traditional fixed gas fire extinguishing system has to press the large space of the room as a protection area.

There is a tropical climate with toxic extinguishing agent usage, to place the extinguishing agent is spraying room, room staff will bring harm to the environment pollution.

IV. fire-fighting equipment solutions — trace tube automatically detecting and fire extinguishing device

Electrical fire, as has long been plagued by fire sector and users of a major challenge, especially with the development of technology, more and more electrical equipment protection issues, has become an urgent problem to be solved. Fire probe tube automatic fire extinguishing fire detection equipment came into being is the genuine solution setPreparation of a medicine for fire, is currently the only solution to the best way to fire fighting equipment. Following our features and advantages for analysis.

1. working principle

Fire on the fire-fighting equipment is the probe layout in fire-prone directly by electronic and electrical equipment, and place it directly as a fire detection and extinguishing spray-and-drop components, use the Fire probe sensitivity to temperature, in the event of fire, in 1-160 ° c ± 2 ° c (distance protection device 1 m wide) temperatures for a few seconds to more than ten seconds, the pressure inside the tube, Fire probe automatically blast holes, the formation of spray extinguishing agent direct injection into the ignition parts of fire.

2. fire-extinguishing efficiency

Because direct arrangements within the protected equipment, guaranteed response quickly, accurately, fire extinguishing agent release timely on the symptoms, the more targeted and effective, prompt and effective detection and fight the earliest fire, is an early fire extinguishing system. This is the traditional fixed gas fire extinguishing system until the fire was already very large, for the entire room or large space for extinguishing the principle is a major step forward.

3. system setting and cost comparison

Fire of fire extinguishing device do not need to set up a dedicated storage bottle, a small footprint. No need to power and complex electronic control equipment and pipelines without dedicated smoking, temperature detector. Systems rely on a fire probe and a set of extinguishing agent bottles, valve, the use of their own reservoir pressure can fire fight in the early stages. System greatly simplified, construction is simple, saving floor space, a significant reduction in the cost of project.

4. fire-fighting costs comparison

Traditional fixed gas fire-extinguishing systems to large closed space of the room as a protection zone, and the fire of fire-extinguishing system only large enclosed space of room volume smaller distribution Cabinet, distribution cabinets, cabling, Groove box, etc. to be protection of electronic and electrical equipment as protection zones. Extinguishing media usage greatly reduced, lower the cost of a fire.

5. safety and environmental protection

Because of this fire extinguishing system is the extinguishing agent release in a closed envelope of Cabinet, regardless of the chosen specification allows a fire extinguishing agent, even if slightly toxic effect on the field will not greatly, harm to a minimum, no personnel emergency evacuation; at the same time, since extinguishant significantly reduce, reduce environmental pollution.

6. advantages

Fast reaction time, rapid fire with the fight in the bud, effectively reduce economic losses caused by fire;

Passive operation. The device does not need a power supply, does the problem causing the device to the power to run, and eliminates should e-mail systems may have the effect of interference and operational capabilities;

Fire probe is soft, not subject to any position, in a variety of small and complex flammable space or equipment;

Distance is protected from fire near, high efficiency, good reliability;

Design a simple, easy installation, low-cost.

5. fire exploration equipment codes and standards

As a new approach to fire extinguishing device, the fire on the device solves the puzzle fire industry has long been on electrical equipment, control box, distribution Board, prone to fire with fire problems of space. In the country has been widely used in power plants, distribution, broadcasting, petrochemical industry, railway system. In the latest revision of the architectural design fire protection standard and thermal power in the fire code for fire protection equipment application on are also described. But in my province, also for the device enacted the fire trace tube automatically detecting and fire extinguishing device design, construction and acceptance of orders, on the probing device application of fire and promotion offers standard and basis. "People-oriented, safety first. To guarantee people's safety and health, to prevent and reduce safety accident disasters casualties as a priority. "Our common purpose