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Measures for fire protection, flood protection, wind protection, cold protection, high temperature protection, moisture protection, virus protection, lightning protection, and small animal protection for substation equipment

According to the requirements of the State Grid Corporation of China’s power substation standardization management regulations, Special measures have been taken to prevent fire, flood, wind, cold, high temperature, moisture, poison, lightning and small animals for substation equipment.

1. Equipment fire prevention measures

1. The substation should be equipped with sufficient fire-fighting equipment and fire-fighting facilities in accordance with the requirements of fire protection regulations. The quantity and type of equipment shall be determined by the company's administrative security department.

2. Fire-fighting equipment should be stored near key fire protection equipment and in a location or fire cabinet that is not easily damaged.

3. The automatic alarm and fire extinguishing systems related to fire protection must be regularly inspected and tested, and the fire extinguishing system must be tested regularly once a year.

4. All fire-fighting equipment must not be modified or used for other purposes. A key inspection of dry powder, 1211, carbon dioxide and other inflatable fire extinguishers should be carried out every six months. Expired or failed fire extinguishers must be replaced and replenished in time. Fixed-location management of fire-fighting equipment must be implemented.

5. Operation and maintenance personnel and watchmen should receive regular fire protection knowledge training, establish voluntary fire protection teams, organize fire drills and fire protection knowledge learning, familiarize themselves with the performance and scope of application of fire protection facilities and equipment, and master To use it, you must be familiar with fire alarm telephone numbers and alarm methods, and master the knowledge and skills of self-rescue and escape.

6. When a fire occurs in a substation, the shift leader on duty must immediately organize the firefighting according to the fire accident plan of our station and report to the relevant superior department. For major fire accidents, the fire brigade should be notified immediately for firefighting and firefighting. Call 119 for fire alarm. When a fire occurs in electrical equipment, the on-duty leader and the corresponding dispatching agency should be reported first, and the power supply of the relevant equipment should be cut off immediately and emergency isolation measures should be taken.

2. Equipment Flood Prevention Measures

1. The substation should be equipped with an appropriate amount of flood prevention equipment and flood prevention materials as needed. Flood prevention equipment should be installed before the annual flood.

Comprehensive inspections and tests must be carried out to ensure that they are in good condition; flood control materials must be kept specially and have special accounts.

2. Before the rainy season, conduct a comprehensive inspection and dredging of basements, cable trenches, cable tunnels and site drainage facilities that may accumulate water, and take measures to prevent water intrusion and drainage.

3. Regularly check that the rainproof covers of switches, gas relays and other equipment should be fastened.

4. Check the house for leaks and sewer pipe drainage when it rains.

5. After rain, check the water accumulation in basements, cable trenches, cable tunnels, etc., and drain the water in time. If the moisture in the equipment room is too high, ventilate it well.

6. The doors of outdoor equipment boxes such as terminal boxes and mechanism boxes should be closed and well sealed.

3. Equipment wind protection measures

1. According to the regional climate characteristics, the substation only has winds in spring and winter every year. In other seasons, the wind is stronger, but it will not exceed level 6 or above. , so outdoor equipment will not be damaged by too much wind.

2. From the equipment voltage level of the substation, the outdoor equipment is 110kV equipment, the main transformer and a small number of 35kV equipment are soft connections. The main transformer incoming line of the 10kV equipment outdoor equipment is hard busbar connection, and the capacitor, All transformers used are connected by cables, and most of the 35kV and 10kV equipment are indoors, so they will not be greatly affected by strong winds.

3. According to the local climate characteristics of the substation, pay attention to the inspection of equipment connection lines during strong wind seasons. If the analysis finds that the equipment swings greatly under the influence of wind, which may cause insufficient safety distance, report to dispatch immediately and relevant management departments, and prepare accident predictions and strengthen inspection and surveillance.

4. Sand and dust pollution has increased in recent years, which has caused certain harm to the porcelain insulation of substation equipment. Therefore, strict tests and creepage tests are required during the annual spring inspection to track the porcelain insulation.

5. When inspecting, pay attention to the door covers of equipment mechanism boxes, terminal boxes and other equipment. They must be closed and tightly sealed.

6. The doors and windows of the main control room and power distribution room should also be closed to prevent dust from flying into the room.

7. In accordance with operation management requirements, increase equipment inspections after strong winds and other weather conditions. Report any problems to the relevant departments in a timely manner.

IV. Measures to protect equipment against cold temperatures

1. The temperature in the substation can reach as low as -18° every winter, so outdoor equipment will not be harmed by too low temperatures.

2. Indoor equipment can turn on the air conditioner to heat up according to the indoor temperature.

3. For outdoor equipment terminal boxes and switch mechanism box heaters, the heaters should be put in and out in time according to the temperature every year to prevent the terminal boxes and mechanism boxes from getting damp.

4. Indoor switch cabinet heaters should be switched on and off in time according to the temperature every year.

5. After the heater is put into use, it must be inspected regularly. If it is found that there is no heat or short circuit, the defect should be reported and eliminated in time.

6. Every year when the temperature is the lowest, heaters should be put into the 35kV and 10kV power distribution rooms to raise the temperature to ensure the normal operation of the relay protection device.

5. Measures to prevent high temperature of equipment

1. The temperature in the substation can reach up to about 35° in summer every year, so outdoor equipment will not be affected by high temperatures.

2. Indoor equipment can turn on the air conditioner to cool down according to the indoor temperature.

3. The indoor protective device itself also generates heat, the ambient temperature is high, the heat dissipation is not good, and the screen door is tightly closed. In this case, the protective device door should be opened, and the screen door should be opened for ventilation and heat dissipation. But the number of inspections should be increased.

4. The main transformer of the substation is an oil-intruded air-cooled transformer. When the temperature reaches the point where ventilation starts automatically, the fan automatically rotates.

5. When inspecting the main transformer in summer, it is necessary to check that each fan is rotating well. If a fan fails, report it and report the defect in time and handle it.

6. Equipment moisture-proof measures

1. The DC system of the substation adopts the two-pole ungrounded method, and the cable trench cover is an independent block. Every spring and autumn, when it rains and snows, Finally, there is a lot of moisture in the terminal box of the substation, which can easily cause the DC system to be grounded at one point.

2. Severe moisture can cause terminal corrosion and poor contact. What's more, two DC points are grounded or short-circuited, causing the circuit breaker to trip, seriously threatening the safe operation of the power grid. In order to ensure reliable moisture removal from the terminal box and prevent DC system grounding and terminal corrosion, the terminal box moisture-proof management system should be strictly implemented.

3. Moisture-proof measures for terminal boxes

1) Terminal boxes made of stainless steel.

2). Place a dehumidification silica gel bag in the terminal box.

3) Install a dehumidification heater in the terminal box.

4). Install blinds on the raised base of the terminal box.

5) Install stainless steel vents every 20 meters on the cable trench cover.

6). When designing, the cable trench should be designed as a sloped cable trench that is easy for water to flow to prevent water accumulation in the cable trench.

7) When making a firewall, leave a hole in the middle of the lower part of the wall to ensure that rainwater can drain away in time.

4. Maintenance work to prevent the terminal box from getting wet

1) Inspect the terminal box during normal inspections.

2) During normal inspection, check the ventilation holes on the cable trench cover to prevent the ventilation holes from being blocked.

3). Every time the weather is fine after a rain, the operator should open the cable cover for inspection. If there is water in the cable trench, organize the water to be pumped out in time.

4) When modifying equipment, maintenance personnel should be required to use chrome-plated rust-proof terminals in the terminal box.

7. Anti-virus measures for equipment

1. When entering limited underground spaces such as cable wells (tunnels, trenches), ventilation should be carried out in advance to prevent oxidation