Zhenjiang Power Supply Company "carpet type" inspection to ensure the safety of equipment

At 8:30 in the morning on April 28th, Jiangsu Zhenjiang Power Supply Company transformed the west of the power transmission and operation room. Qian Chaochun, the head of the shift supervisor, immediately turned over the shift and immediately called his apprentice Zhao Wei to start an all-weather special tour.

“The May Day holiday is approaching. To ensure a steady supply of electricity, a special week of substations will start from today.” Qian Chaochun introduced. It is understood that there are altogether three teams in the substation, each team dispatches two staff members each day and adopts the “student-subsidiary” model to conduct inspections to ensure the quality of inspections and enhance the practicality of young employees.

"The money class, work kits, safety helmets, flashlights, infrared thermometers and other equipment are ready."

“Departure!” At 8:40, after listening to Zhao Wei’s report, Qian Chao looked down at the watch and gave an order.

“Today, the task of Xiao Zhao and I is to conduct a deep inspection of the four substations of the 110-kilovolt big city mouth, Shuangjing, southern suburbs, and the eastern suburbs, and to advance the equipment in advance.” Once on the train, Qian Chaochun can't wait to Today's work task blurted out.

Starting from the western part of Tanshan Road, it will be transported to and from Wiban. After a 20-minute drive, it will arrive at the 110-kilovolt Daoshikou Substation in downtown Zhenjiang. “Dajiekou is the core commercial area of ​​Zhenjiang, where Dagukou is responsible for two-thirds of the power supply pressure in the commercial district. In March, two outbreaks caused the failure of Daoshikou's frequency conversion. The change of the mouth is extraordinary." Qian Chaochun told the author.

After getting off the car, Qian Zhaochun and Zhao Wei quickly stepped into the substation and came to the 10-kilovolt switch room. "Inspectors must have a strong sense of responsibility and fully understand the importance of equipment inspections. Patience should be patient and ensure that equipment inspections are exhausted. At the same time, there must be strong thinking and judgment, and when equipment defects are discovered, The correct classification, identify priorities." Before the inspection, Qian Zhaochun preached "Golden Ideas" to Zhao Wei, who had just joined the company last year.

At 9:10, Zhao Wei started a "carpet-type" inspection of the switch cabinet inside the 10 kV switch room. He carefully bent down, his eyes intently inspected whether the cable head in the switch cabinet was hot, whether the protection device issued an alarm signal, etc., and then used the ear to hear whether the device issued a discharge sound, and finally switched to the nose smelling if it drifted out of the burnt smell. Standing behind him, Qian Zhaochun observed the sequence of the apprentice's inspection and whether there were any errors in his actions. He told the author: “The switch room is the first link in the inspection of the substation. If you hear the sound of the discharge, it shows that the insulation of a certain part of the switch cabinet is reduced. , It is possible to produce a short-circuit fault, which will easily lead to a line tripping. If you smell the burnt smell, it means that the insulating layer discharges, the surrounding material is exposed to high temperature radiation, and the taste emitted after 'barbecue'."

“In the money class, there is no heating phenomenon in the cable head and the protection device has no alarm signal. The switchgear equipment is all normal.” During the conversation, Zhao Wei reported to Qian Chaochun truthfully. Afterwards, Qian Chaochun personally checked the device and confirmed that there was no abnormality in the equipment. He also specified the inspection time on the task sheet he carried with him, and he came to the main transformer room.

“Checking the main transformer room with two 110-kilovolt transformers is the most important part of the tour. It was always followed by the masters. Today we must concentrate on the 'battlefield' alone.” At 9:30, Zhao Wei took a fresh look. At the main oil temperature and oil level, carefully observe the trends of temperature and oil level curves in the oil temperature gauge and oil level gauge. Approximately one minute was observed on the spot and the curve was found to match the temperature and oil level operating ratio. After that, check whether there is any leakage oil in the main body. I saw Zhao Wei walk around the two masters and wandered around, looking directly at the goose underneath the main change, and scanning the traces on each stone.

“This is the most convenient way to check the oil leakage of the main transformer. If there is oil on the surface of the goose, it means that there is oil leakage in the main transformer. You can look along the top of the oil goose soft stone to find the oil leakage point.” Spring explained to the author.

At 9:40, after checking the main transformer body, Zhao Wei took an infrared thermometer from the hands of Qian Chaochun and began infrared temperature measurement of the main transformer. I saw Zhao Wei holding the thermometer at a distance of 1.5 meters from the main transformer and measuring the temperature of the casing lead wire and the casing body.

“The temperature of the equipment is normal.” Five minutes later, Zhao Wei reported to Qian Chaochun.

"In general, the temperature of the equipment is slightly higher than the surrounding environment. Once it exceeds 70 degrees, it can be determined that the main transformer is abnormal." Zhao Wei further said.

After completing the main transformer tour, Zhao Wei's forehead has been covered with a layer of dense sweat. After simple wiping, the GIS equipment is subjected to air chamber pressure and whether there is abnormal signal in the exchange control cabinet. Then came to the second floor to inspect the protective side hole device, AC/DC system, and communication system.

According to Qian Zhaochun, in accordance with the requirements of standardized inspections, operating personnel can “see” the primary transformers, GIS equipment, switchgears, primary equipment, and AC/DC power supplies, secondary batteries, and other secondary equipment in substations by looking, listening and touching. , sniffing, measuring, and other means, conduct thorough inspections of the equipment. The contents include field data copying, equipment appearance inspection, temperature measurement of primary and secondary equipment, partial discharge switchgear and hole blocking, heater check, etc., to ensure the health status of various equipment, and to advance the health of equipment in summer. "Pulse". At 10:00, the main equipment of Dashikou Substation has all been inspected.

According to the recent increase in rainwater, Zhao Wei made a comprehensive use of security, holding a flashlight down to the cable layer, leaking and draining cable trenches, blocking the site's holes, seeping water in the roof and walls, and draining water. Checking to ensure the ability of substations to resist floods during flood control.

At 10:15, Qian Chao led Zhao Wei and conducted investigations on ancillary facilities such as fire-fighting equipment, indoor and outdoor lighting systems, and monitoring backstage. Until the inspection of complete spare parts and safety equipment is in place, marking the first station of the masters and apprentices, the city's mouth inspection officially ended.

“The main transformer was discolored and the corridor lighting facilities were damaged.” At 10:30, Qian Chaochun recorded the problems found during the inspection on the worksheet, and immediately reported to the substation to seek treatment. At 10:35, the two embarked on an engineering vehicle and drove to the next 110 kV Shuangjing substation, which was in urgent need of "pulse."

It is reported that Zhenjiang Power Supply Company, in conjunction with the equipment operating characteristics of the May Day Holiday, conducted a comprehensive "physical examination" on the 45 substations under 110 kV that were under jurisdiction. Inspectors conduct timely temperature measurement and follow-up inspections on substations with large loads, paying close attention to abnormal conditions such as overload and heat generation of the equipment, strengthening personnel management for important load substations, ensuring that inspections are in place, and strengthening security management in overcrowded places. To ensure that the substation security work does not leave dead angles, strengthen the safety inspection of air-conditioning, electronic fences, infrared radiation and other equipment in substations, and eliminate loopholes in security caused by the negligence of personnel; strengthen program management, according to the blackout plan during inspections, The risk analysis and fence management of the gate operation site shall be accompanied by a series of inspections to make on-site inspections, and plans shall be made in advance to implement the safety and prevent the risks caused by the rush, so as to help the safe and stable operation of the power grid during the May Day holiday.

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