Ventilating, noise-reducing and cooling method and device for unpowered electric transmission and transformation device

Abstract

The invention relates to a ventilating, noise-reducing and cooling method and device for an unpowered electric transmission and transformation device and belongs to the field of electric power protection. According to the ventilating, noise-reducing and cooling method for the unpowered electric transmission and transformation device, air inside a cable tunnel is led into a substation chamber through an air inflow pipe, the used device comprises a cable conduit and the substation chamber, a rotating air exhaust fan is installed at the position of an overhaul well of the cable tunnel, joints of the cable tunnel and the substation chamber are communicated through the air inflow pipe, and an exhaust fan is arranged at the position inside the substation chamber corresponding to the position of an outlet of the air inflow pipe. According to the ventilating, noise-reducing and cooling method and device, the problem that room temperature of a transformer room is too high when a substation in a city is faced with a summer peak load period can be solved, disputes of disturbance to residents caused by noises generated by fans are also avoided, smooth stable running of indoor devices is guaranteed, energy is saved, consumption is reduced, and reliability of power supply of a power grid is improved.

Description

technical field [0001] The invention relates to a method and device for ventilation, noise reduction and temperature reduction of power transmission and transformation equipment without power, and belongs to the field of electric power protection. Background technique [0002] With the continuous expansion of urban construction, the number of power transmission and transformation equipment in urban areas is increasing. The power, lighting and control cables of power transmission and transformation equipment of various voltage levels are arranged in stations and cable tunnels. When the cables are running indoors and in tunnels Dissipates a lot of heat. The transformers and other equipment operating in the substation are operating at full load, and the room temperature is high in summer (nearly 80°C). Although the transformer room has been ventilated (installed with a fan), and the dust and blockage of the transformer room door ventilation net has been dismantled and washed, t...

AI Technical Summary

Problems solved by technology

[0004] Usually, indoor substations mainly rely on the fan system of the equipment to carry out air convection with the outside world to achieve the effect of cooling, but there are problems such as slow cooling speed, long cooling duration, and large power consumption.

Since the high-voltage and high-current power supply equipment operating in the substation can be seen everywhere, these equipment will increase the power consumption of the transformer when the bus carrying current is too large or the switch contact resistance is too large, resulting in excessive temperature rise and protective tripping. In the long run, the performance of insulating components will be reduced, and even lead to breakdown, which will easily cause major accidents such as substation outage

[0005] The cable tunnel is connected to the substation, and the underground air inside is very humid at room temperature (15-20°C) throughout the year, which can easily cause corrosion of grounding electrodes and cable brackets. Therefore, it is necessary to send personnel to inspect under the cable tunnel all year round. The air in the tunnel often contains biogas and other harmful components to the human body, so before each inspection, the manhole cover must be opened for more than half an hour to ventilate, which prolongs the inspection cycle

Therefore, the maintenance work of the cable tunnel needs to invest a lot of manpower, material resources and financial resources.

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