Chinanews.com, December 30. According to the National Energy Administration website, in the third quarter of 2020, there were no major electrical personal injuries or deaths across the country, no power system hydropower dam collapses, flooding, or incidents that have a major impact on society. .
In the third quarter, there were 9 electric power accidents, 12 fatalities, and 1 serious injury. The number of accidents decreased by 3 and the death toll decreased by 2 compared with the same period last year. Among them, there were 5 accidents involving electric power production, 4 fatalities, and serious injuries. 1 person, the number of accidents decreased by 5 year-on-year, and the number of deaths decreased by 6 year-on-year; there were 4 personal injuries and deaths in power construction, with 8 people killed, the number of accidents increased by 2 year-on-year, and the number of deaths increased by 4 people year-on-year.
There were no electrical equipment accidents with a direct economic loss of more than 1 million yuan, which was the same as the previous year.
There was one power safety incident, a decrease of one year-on-year.
Accident sequence
1. Enterprise
(1) Member units of the National Electric Power Safety Committee:
State Grid Co., Ltd. had a major electric power personal injury and death accident, resulting in 5 deaths;
China Huaneng Group Co., Ltd. occurred in 3 electric power casualties and 3 people died;
China Datang Group Co., Ltd. had an electric power casualty accident with one death;
One electric power casualty accident occurred in the State Energy Investment Group Co., Ltd., with one death;
China Southern Power Grid Co., Ltd. occurred in 1 electric power accident, 1 serious injury, and 1 electric safety incident;
(2) Other units
One personal injury and death accident occurred in SDIC Bio-Jilin Co., Ltd. Meihekou Fukang Thermal Power Co., Ltd., with one death;
One electric power casualty accident occurred in Alxa New Energy Branch of Chinalco Ningxia Energy Group Co., Ltd., with one death;
2. Area
There was one major electric power personal injury and death accident in Hunan Province, with 5 deaths;
In the Inner Mongolia Autonomous Region, there were 4 electrical personal injuries and deaths, 4 deaths, and 1 electrical safety incident;
There was one electric power casualty accident and one death in Jilin Province;
One electric power accident occurred in Shanghai, with one death;
There was one electric power casualty and one death in Shandong Province;
There was one electrical personal injury and death accident in Guangxi Zhuang Autonomous Region, and one person was seriously injured;
One power safety incident occurred in Guizhou Province.
Analysis of the cause of the accident
The number of accidents in the third quarter decreased by 2 compared with the same period last year, and the death toll decreased by 2 compared with the same period last year. Among them, poisoning and suffocation caused 2 accidents and 6 deaths, electric shock caused 3 accidents, 2 deaths, 1 serious injury, and object strikes caused 2 There were 2 deaths in the accident, 1 accident and 1 death caused by falling from height, 1 accident and 1 death caused by lifting injury; 5 accidents and 8 deaths caused by human unsafe behavior, and 3 accidents caused by unsafe conditions People died, and environmental reasons caused 1 accident and 1 death.
The above incidents have exposed the lack of safety awareness and skills of some power enterprise employees. The risk identification before operation is a mere formality. Misoperation, wrong interval, blind rescue, and heavy construction period regardless of safety have been repeatedly prohibited. The plan for high-risk operations is reviewed. , Demonstration, and on-site guardianship go through the scenes, and there is "relaxed and soft" safety control of outsourcing units.
Brief accident incident
(1) Personal injury and death accidents in power production
On January 25, a personal injury accident occurred in Fukang Thermal Power Co., Ltd., Meihekou City, Jilin Province, which belongs to SDIC Bio-Jilin Co., Ltd., and one person died.
The staff of Fukang Thermal Power Co., Ltd. went to the water source to close the valve of No. 3 well in accordance with the instructions. After wearing a long-tube respirator, a downhole operator suddenly fell to the bottom of the well while operating the valve, and died after being rescued by the hospital.
On February 9, a personal injury accident occurred in the New Energy Branch of China Datang Group Co., Ltd. Datang Shandong Power Generation Co., Ltd. One person died.
An operator of Datang Yantai Jinling Wind Farm was patrolling the 35kV collection line on the site. When using a garden telescopic saw, he was electrocuted due to insufficient safety distance and died after rescue.
On March 9, a personal injury accident occurred in the Alxa New Energy Branch of China Aluminum Ningxia Energy Group Co., Ltd., and one person died.
An operator from Dongfang Electric New Energy Technology (Chengdu) Co., Ltd., the operation and maintenance unit of Baxingtu Wind Farm, was dealing with the deformation of the conductor rail of the wind turbine. During the climbing process, the seat belt was not properly hung from the third tower. It fell about 10 meters from the overhaul platform at the bottom of the tower, and died after rescue.
On April 21, a personal injury accident occurred in the Guilin Lingui Power Supply Bureau of China Southern Power Grid Co., Ltd. Guangxi Power Grid Co., Ltd., and one person was seriously injured.
Guangxi Power Grid Co., Ltd. Guilin Lingui Power Supply Bureau was in the process of carrying out the operation and maintenance of the 10 kV tea cold water line distribution network line. An operator mistakenly boarded the 10 kV Chacidong line near the live line. .
On May 25, a personal injury accident occurred at the Shanghai Shidongkou No. 1 Power Plant of the East China Branch of China Huaneng Group Co., Ltd. One person died.
In the closed project of Shanghai Shidongkou No. 1 Power Plant Coal Yard, the general contractor of the construction, Shanghai Construction Engineering Group Co., Ltd., an operator from the professional subcontractor Guoji Construction Group Co., Ltd. was disassembling the truss lifting equipment. When the special lifting frame was smashed by the steel structure component of the lifting frame that was overturned, the rescue failed and died.
(2) Personal injury and death accidents in power construction
On January 2, a personal injury accident occurred in the Hengnan (Duiziling) 220kV transmission and transformation line construction project of the State Grid Co., Ltd. Hunan Hengyang Power Supply Company, and 5 people were killed.
The professional subcontractor of Hunan Power Transmission and Transformation Engineering Co., Ltd., the general contractor, Hunan Silian Electric Power Construction Company. During the construction of the G30 tower foundation, an operator entered the 13.2m deep foundation pit with an entrance diameter of 2m to bind and fix it. Asphyxiation occurred during the management, and then 4 more workers also suffocated when they entered the foundation pit one after the other for rescue. 5 people died after the hospital rescue failed.
2.7 On 8th, a personal injury accident occurred in the construction project of Shengli Power Plant of Xilin Gol Thermal Power Co., Ltd. of China Huaneng Group Co., Ltd. One person died.
The construction unit Heilongjiang Huaneng Electric Power Technology Co., Ltd., a professional subcontractor of Heilongjiang Construction Installation Group Co., Ltd., was hoisting the fixed pulley when hoisting the spring hanger near the left side of the No. 8 flue gas pipeline on the 15.5 meter layer of the No. 2 boiler The wire rope broke, the fixed pulley and the spring hanging bracket fell at the same time, collided with a worker on a 20-meter scaffolding work platform, and fell. The safety belt hung the worker in the outer gap of the 15.5-meter guardrail. The rescue was invalid. death.
On March 24, a personal injury accident occurred in the Shengli Power Plant construction project of the Shengli Energy Branch of the State Energy Investment Group Co., Ltd., China Shenhua Energy Co., Ltd., and one person died.
The labor subcontractor of the professional subcontractor Anhui Electric Power Construction Second Engineering Co., Ltd. A construction worker from Anhui Hanjin Construction Engineering Co., Ltd. was dropped by a foot at 12.95 meters when cleaning the outer wall of the scaffolding of the desulfurization complex building The hand tube was hit and died after rescue.
On April 20, Inner Mongolia Tongliao Wind Power Co., Ltd., a subsidiary of China Huaneng Group Co., Ltd., suffered a personal injury and death in the subsequent 200MW wind power construction project of Kailu Jianhua, and 1 person died.
In the process of hoisting the engine room of No. 106 wind turbine, the operator of the construction unit of China Power Large Equipment Engineering Installation Co., Ltd., when the operator was pulling the cable wind rope, due to the sudden wind impact, the cable wind rope swayed close to the high-voltage wire, causing the cable wind The rope was instantly electrified, and an operator who was pulling the wind rope at the front was electrocuted.
(3) Power safety incident
1.9 On 2nd, China Southern Power Grid Co., Ltd. Guizhou Power Grid Company suffered a grid line failure which caused the entire Pannan Power Plant of Guangdong Energy Group Guizhou Yueqian Electric Power Co., Ltd. to outage.
At 13:36 on September 2, a single-phase permanent ground fault occurred at 34.68 km of Phase B of the 500 kV Panhuan Line A of the Pannan Power Plant, and it coincided with the overhaul of another line Panhuan Line B of the power plant. The channel was interrupted, the whole plant was out of power, and the loss of load was 1.441 million kilowatts.
At 1:15 on September 3, the line resumed operation; at 2:7, Unit 3 was connected to the grid and the whole plant resumed external power supply.
Combining the characteristics of recent accidents and the key work of safety supervision in the next stage, the National Energy Administration puts forward the following requirements:
Strengthen safety measures for high-risk operations in deep foundation pits.
All units participating in the project must strengthen the safety management of deep foundation pit operations, and the special construction plan must be verified by experts and provided on-site safety technical clarification before construction, and emergency plans to prevent accidents must be formulated.
The construction unit shall carry out construction strictly in accordance with the approved special construction plan, and shall not change at will.
The supervision unit shall supervise the whole process of the deep foundation pit project to prevent illegal operation and blind construction.
During the construction, the inspection and observation of the settlement, deformation, ventilation, groundwater level change, and poisonous gas of the deep foundation pit and surrounding environment should be strengthened. Abnormal situations should be reported in time, and effective measures should be taken to eliminate hidden accidents in time.
Resolutely put an end to the occurrence of low-level violations such as wrong intervals.
It is necessary to scientifically and reasonably control the pace of work, grasp the pre-operation site survey, plan review, risk identification, risk control and on-site work organization, rigidly implement the "Safety Regulations", "Two Invoices" and other regulations and requirements to ensure that operational risks can be controlled control.
Combining on-site operations to flexibly carry out basic safety skills and safety awareness education and training, and strictly accountability for violations that do not strictly implement "power outages, electrical inspections, grounding wires" and not checking the number of poles and towers before climbing.
Effectively prevent the safety risks caused by the "rush for construction period".
The construction unit shall fully evaluate and demonstrate the project in accordance with the relevant national regulations on the construction period of the project and the relevant period requirements in the project feasibility study report, scientifically determine the reasonable period of the project and strictly organize the implementation.
If the project cannot be completed according to the original schedule due to the influence of objective conditions, the construction unit shall reorganize the demonstration and evaluation of the construction period, reasonably adjust the construction period, and ensure the input of safe production costs, and resolutely prevent the phenomenon of reducing the construction period without evaluation and approval. .
Especially in wind power engineering projects, the phenomenon of "running deadlines" is more common, focusing on investigating and resolving hidden dangers such as irregular operator behaviors and inadequate safety measures, strengthening risk identification analysis and management and control, strengthening safety management on the job site, and achieving full supervision.
Strengthen accident prediction and rationally arrange operation methods.
Dispatching agencies and power generation companies should strengthen contact with meteorological departments, keep abreast of meteorological data such as water conditions, thunder and lightning, and wind levels, and arrange timely operation methods that are compatible with the weather.
It is necessary to conscientiously implement the roving inspection system, and report and deal with equipment defects and abnormalities in a timely manner.
In the event of abnormal weather, natural disasters, and weak system operation, the number of rounds of inspections of equipment should be strengthened, and accident predictions should be made.
The National Energy Administration requires that the lessons learned from the "11·22" deflagration accident at Shandong Quancheng Station should be deeply rooted, and equipment quality and safety management should be strengthened.
At 16:36 on November 22, 2019, the 1000kV AC UHV Quancheng Substation managed by the Shandong Provincial Electric Power Company under the State Grid Corporation of China failed to explode and burned during the normal operation of the B phase of the main transformer 3, and the B phase transformer was burned, causing the accident One person died and two were seriously injured.
The investigation determined that the "11·22" deflagration accident at Quancheng Station was a general electrical equipment accident that caused deflagration due to quality defects in the capacitor core of the transformer's high-voltage bushing, resulting in equipment damage and personal injury.
The direct cause of the accident was the quality defect of the capacitor core of the high-voltage bushing, which caused partial discharge, which caused the lower porcelain sleeve to be damaged and exploded, arc discharge to the ground, oil and gasification of the transformer, the pressure in the fuel tank increased sharply, the fuel tank burst, and a large amount of fuel gas was ejected, causing an explosion combustion.
The accident exposed the internal quality defects of the 1000 kV grid-side bushing capacitor core.
The pressure release device of the transformer box does not play a role in preventing serious deformation and bursting.
Equipment supervision records and on-site concealed engineering supervision are not standardized.
The monitoring methods of UHV transformers are not perfect, it is impossible to quickly isolate the faulty equipment in the early stage of the fault, quickly control the expansion of the fault, and it is difficult to effectively carry out the remote inspection and confirmation of the abnormal state of the equipment.
The National Energy Administration stated that all relevant units must learn from the accident and strengthen equipment safety management from the following aspects:
Strengthen the source management of equipment quality.
Electric power companies should further strengthen equipment design and selection and procurement management for power construction projects, clarify equipment quality requirements and performance indicators, and leave sufficient safety margins for important equipment.
Improve the equipment bidding system, strictly control equipment access, and bidding and bidding must clearly require equipment manufacturers to learn from relevant accidents and implement anti-accident prevention measures.
It is necessary to establish a credit evaluation mechanism for equipment suppliers, implement an efficient traceability mechanism for equipment quality problems, and resolutely reject equipment manufacturers with poor quality and credit.
Strictly control equipment manufacturing supervision, infrastructure construction, installation and acceptance.
Electric power companies must strictly implement the system of in-plant supervision of important equipment, supervise the process flow, manufacturing quality and quality system of the equipment manufacturing unit in the manufacturing and production process of the equipment, and participate in the review of the modification of the manufacturing unit’s equipment manufacturing process and technical parameters. Find and deal with quality problems in the manufacturing process in time.
Comprehensively strengthen equipment unpacking acceptance, installation and commissioning, engineering division and overall inspection and acceptance, and urge equipment suppliers to strengthen professional technical guidance for on-site installation, and improve construction quality and technological level.
It is necessary to strengthen the side station supervision of concealed projects, and strengthen the quality acceptance and elimination of defects at all levels.
Strengthen the management of equipment operation, overhaul and transformation.
In response to new situations and new problems arising in the operation of UHV power transmission and transformation equipment such as AC and DC transmission and transformation equipment, timely formulate and revise relevant equipment technical standards and handover test and maintenance operation procedures to effectively improve the safety management level of new power equipment.
For new technologies and new equipment, electric power companies, including dispatching agencies, must understand and master their safety technical characteristics, take effective safety risk control measures, and conduct special safety production education and training for employees to ensure the personal safety of operators.
Strengthen the operation and maintenance of equipment, strengthen condition monitoring, analysis and equipment and facility defect management, promote the use of big data technology and equipment intelligent diagnosis technology, carry out centralized maintenance and special rectification, and improve the reliability of equipment operation.
Improve emergency response capabilities.
Establish and complete an emergency coordination and linkage mechanism with relevant local government departments, related units and surrounding enterprises, carry out fire anti-accident drills, and improve personnel emergency response capabilities.
According to the characteristics of UHV equipment, the fire-fighting facilities and equipment shall be modified to improve the construction standards of fire-fighting facilities.
In the process of rectification of major equipment safety hazards, monitoring should be strengthened, effective preventive measures should be taken, emergency plans should be formulated, emergency drills should be carried out, and major safety hazards should be controlled and controlled.
Strict accident reporting procedures, perfect the safety information reporting system in accordance with national laws and regulations, straighten out the information reporting process, and do a good job in reporting power safety information to ensure that power emergencies are reported in a timely, accurate and truthful manner.
Establish and improve a long-term mechanism for equipment safety management.
Technical supervision should be used as an important means to discover and eliminate hidden equipment hazards, carry out in-depth analysis and application of equipment reliability information, strengthen main equipment operation trend analysis and comprehensive status assessment, and guide equipment selection and purchase, daily maintenance, hidden hazard management, and technology upgrades Wait for work.
To implement the territorial management responsibilities of local power management departments, local governments at all levels of power management and other relevant departments must follow the "Implementation Opinions of the National Development and Reform Commission and the National Energy Administration on Promoting the Reform and Development of Electric Power Production Safety" (Fagai Energy Regulation [2018] No. 1986 ) Requires that local power safety management responsibilities be performed in accordance with laws and regulations, and safety supervision work is done well.
Give full play to the advantages of the territory, carry out safety supervision and inspection, and promote enterprises to improve the level of equipment safety management.
Strengthen the safety management of new UHV technologies and equipment.
Electric power companies should strengthen research on the operating principles of UHV equipment, strengthen technical analysis of the direct causes of power safety accidents, disclose faulty equipment models, manufacturing units, and equipment hidden dangers, and strengthen the typical hidden dangers of equipment and "family Assessment and identification and statistical analysis of the hidden dangers of sex.
It is necessary to conduct a comprehensive investigation of hidden dangers and defect management of UHV power transmission and transformation equipment in operation, establish a safety risk management account, formulate practical rectification plans, implement rectification responsibilities, rectification funds, rectification measures, rectification plans and rectification deadlines, The potential safety hazards of equipment will be rectified within a time limit.
Strengthen equipment monitoring, take timely maintenance, replacement and other measures to resolutely avoid the occurrence of equipment running with diseases.
Promote the use of big data technology and equipment intelligent diagnosis technology, and give full play to the early warning role of online monitoring instruments.