What kind of accidents in the power system accidents as faults What kind of definition for the obstacle

Accidents and obstacles

5.1 Personal Accident

5.1.1 one of the following circumstances occurring in the event of personal injury or death, for the production of electric power accidents:

5.1.1.1 employees engaged in the production of electric power in the course of the work, the occurrence of personal injury or death (including production of acute poisoning caused by personal injury or death, the same hereinafter).

Interpretation of electric power production-related work in the process of personal injury and death include work in the process of violating labor discipline and personal injury and death.

Productive acute poisoning refers to productive poisoning. Food poisoning and occupational diseases are not included in the statistical scope of this regulation.

Employees in the work process due to disease caused by casualties, diagnosed by the hospital above the county and the supervision and management of production safety department investigation, confirmed that the employee's own disease caused by the electricity production accident statistics.

Employee casualties occurring in the "private work" is not as a power production casualties, but one of the following cases is not as "private work":

(1) specific staff work tasks are arranged by the superiors (including team leaders)

(2) The specific staff member's behavior is not aimed at personal gain.

5.1.1.2 In the course of the employee's work related to power production, a traffic accident for which the unit bears equal or greater responsibility occurs, resulting in personal injury or death.

Interpretation Employees (including drivers and employees in cars) engaged in work related to power production, the occurrence of road traffic accidents investigated and handled by public security organs, and in the "Road Traffic Accident Liability Determination" ruled that the party has "equal responsibility", "main responsibility" or "full responsibility".

Power production accidents occur in road traffic accidents investigated and handled by the public security organs, and in the "Road Traffic Accident Liability Determination" it is determined that this party bears "equal responsibility", "major responsibility" or "full responsibility", and causes injury or death to the employees of this unit.

When a motor vehicle in the power production area is crushed, falls, crashes or overturns while traveling; when people get on and off the vehicle while traveling; or when the vehicle runs, etc., and this party bears "equal responsibility", "main responsibility" or "full responsibility" for the injury or death of its own employees, this party bears "equal responsibility", "main responsibility" or "full responsibility" for the injury or death of its own employees. "or" full responsibility "should be reported as a power production accident statistics, and reported to the local production safety supervision and management department, the type of accident fill in the" vehicle injury ".

Traffic accidents that occur when employees commute to and from work on the unit's transportation vehicles, participate in unit-organized sports and cultural activities, or go out for meetings are not considered as power production accidents.

5.1.1.3 In the power production area, the personnel from outside the unit engaged in the process of work related to power production, the occurrence of personal injury or death for which the unit is responsible.

Interpretation of this unit is responsible for, refers to one of the following circumstances:

1, qualification review is lax, the project contractor does not meet the requirements;

2, before the start of work did not carry out a comprehensive safety and technical briefings to the contractor in charge, engineering and technical personnel and safety supervisory personnel, or no complete record;

3, the operation of the hazardous production area did not Prior to special safety technical briefing, not require the contractor to formulate safety measures, not cooperate with the relevant safety measures (including relevant facilities, equipment on the installation of clear safety warning signs, etc.);

4, did not sign the agreement on the management of production safety, or the agreement does not specify their respective responsibilities for production safety and safety measures should be taken.

Qualification review includes business license and qualification certificate issued by the relevant departments, qualification certificate of the legal representative, construction resume and safety construction record in the past three years; whether the technical quality of the construction manager, engineers and workers meets the requirements of the project; whether the special types of work are licensed; whether the construction machinery, work equipment and safety protection facilities, safety gear meets the needs of the construction; whether the two-tier organization with the Whether the contractor has a full-time safety management organization; whether the construction team of more than 30 people is equipped with a full-time safety officer, and whether there is a part-time safety officer for less than 30 people.

Hazardous production area refers to the place that is prone to electric shock, fall from height, explosion, blasting, lifting operation, poisoning, asphyxiation, mechanical injury, fire, burns and other causes of personal injury and equipment accidents.

5.1.2 Classification of personal accidents

5.1.2.1 Extraordinary personal injury and death accidents

Accidents in which there are 10 or more deaths.

5.1.2.2 Major Personal Injury Accidents

Accidents with 3 to 9 deaths.

5.1.2.3 General Personal Injury Accidents

Accidents in which 1 to 2 persons die at one time (including minor and serious injuries in the case of multiple accidents).

Interpretation according to the Ministry of Labor in September 1993, the Ministry of Labor (1993) No. 140, "enterprise workers casualty report statistical questions and answers," Article 48, such as workers injured, died within 30 days (except for deaths due to medical malpractice, but must be confirmed by the Department of Medical Accident Appraisal) are based on the death of the statistics; more than 30 days after the death of the death of the death of the death of the supplemental reporting and The death of more than 30 days after the death, no more death report and statistics; minor injuries into serious injuries are also in accordance with this principle of reporting and statistics.

5.1.2.4 Accidents with serious and minor injuries

Personal accidents in which no deaths occurred.

Interpretation of serious injury accidents are determined in accordance with the 1960 (60) Zhonglao Nursing Jiuzi No. 56, "Opinions on the Scope of Serious Injury Accidents". Slightly injured accident refers to the injured worker resting for more than one working day, but not enough to be seriously injured.

5.2 Grid Accidents and Obstacles

5.2.1 Extraordinary Grid Accidents

The occurrence of large-scale power outages in the power grid under one of the following circumstances is an extraordinary grid accident.

5.2.1.1 Provincial or autonomous region power grids or the Southern Power Grid supply load reduction reaches one of the following values:

Grid Load Supply Load Reduction

20,000MW and above 20%

10,000~20,000MW or less 30% or 4,000MW

5,000~10,000MW or less 40% or 3,000MW

1,000 to less than 5,000MW 50% or 2,000MW

Interpretation of the grid load, refers to the unified dispatch of the power dispatch organization of the grid before the accident.

When the load reduction of the grid supply affects several provincial power grids, the load of the grid is calculated in accordance with the load of the entire grid of the Southern Power Grid before the accident. The scope of calculation of supply load reduction is the same as that of grid load calculation.

5.2.1.2 Cities where the people's governments of provinces and autonomous regions are located and other large cities where the supply load reduction is 80% or more.

Interpretation of large cities refers to urban and suburban areas of non-agricultural population of more than 500,000 cities; medium-sized cities refers to urban and suburban areas of non-agricultural population of more than 200,000, less than 500,000 cities. Small cities are cities with a non-agricultural population of less than 200,000 in the urban and suburban areas.

The supply load reduction of a city means the supply load reduction within the urban area, excluding counties or county-level cities under the jurisdiction of the city.

5.2.2 Major Grid Accidents

A major grid accident is defined as one that does not constitute a major grid accident but meets one of the following conditions.

5.2.2.1 Provincial or autonomous regional power grids or Southern Power Grid load reduction reaches one of the following values:

Grid Load Load Reduction

20,000MW and above 8%

10,000~20,000MW or less 10% or 1,600MW

5,000~10,000MW or less 15%

5,000~10,000MW or less 15%

5,000~10,000MW or less than 1,000MW or 1000MW

Below 1000~5000MW 20% or 750MW

Below 1000MW 40% or 200MW

5.2.2.2 Cities where the people's governments of provinces and autonomous regions are located as well as other large cities with load reduction of supply of 40% or more.

5.2.2.3 Medium-sized cities with load reduction of 60% or more.

5.2.2.4 Small cities with load reduction of 80% or more.

5.2.3 Class A General Grid Accidents

No special or major grid accidents, one of the following conditions is met, and it is classified as a Class A General Grid Accident.

5.2.3.1 Provincial power grids of 110kV and above or the Southern Power Grid are abnormally unlisted, and cause the load reduction of the whole network to reach one of the following values:

Grid Load Load Reduction

20,000MW and above 4%

10,000~20,000MW below 5% or 800MW

5000~10000MW and below 8% or 500MW

1000~5000MW and below 10% or 400MW

1000MW and below 20% or 100MW

Interpretation of the grid abnormal unclosing includes automatic unclosing, relay protection and safety automation device action unclosing.

5.2.3.2 Forced total shutdown of any voltage level busbar at substation 220kV and above. (A general grid accident)

Interpretation forced to stop running is the state of equipment without scheduling approval and stop running, or can not be immediately put into operation according to the provisions of the state.

5.2.3.3 The power quality of the grid is reduced, resulting in one of the following situations:

(1) For grids with an installed capacity of 3,000 MW and above, the frequency deviation exceeds 50±0.2 Hz and continues for more than 30 minutes; or the frequency deviation exceeds 50±0.5 Hz and continues for more than 15 minutes.

(2) For grids with an installed capacity of less than 3,000 MW, the frequency deviation exceeds 50±0.5 Hz, and the continuation time is more than 30 minutes; or the frequency deviation exceeds 50±1 Hz, and the continuation time is more than 15 minutes.

(3) Voltage monitoring and control point voltage deviation exceeds ±5% of the voltage curve value stipulated by the power dispatch, and the continuation time is more than 2 hours; or voltage deviation exceeds ±10% of the voltage curve value stipulated by the power dispatch, and the continuation time is more than 1 hour.

Interpretation of the installed capacity of the grid refers to the total capacity of all grid-connected generating plants that participate in the unified dispatch of the grid.

When the dispatch uses the voltage control range instead of the voltage curve, the duration of the voltage crossing (crossing the upper limit or crossing the lower limit) is more than 2 hours, and this article also applies.

5.2.4 Class B General Grid Accident

It does not constitute a special or major grid accident, and if it meets one of the following conditions, it is designated as Class B General Grid Accident.

5.2.4.1 Loss of stability of 110kV and above power grid. (Class B general grid accidents)

Interpretation of grid loss of stability refers to the same grid, due to large or small disturbances, so that parallel operation of two or several power sources between the loss of synchronization or loss of stability of the grid voltage. In the event of a loss of stability of the grid, this article applies whether or not automatic measures are used and whether or not stability is regained.

5.2.4.2 Unnatural desynchronization of inter-provincial grids of 500kV (including Hong Kong 400kV) and above. 5.2.4.3 Unnatural desynchronization of grids of 110kV and above into three or more pieces.

Interpretation of each piece of the grid regardless of whether or not it causes the grid to reduce the supply load, this article applies. Three slices in this article does not include the installed capacity of 50MW and the following local power plants operating in isolation of the slice.

5.2.4.4 In the event of one of the following:

(1) unplanned shutdown of the main protection of the lines and transformers operating on busbars and contact lines of 220kV and above, resulting in the operation of the main protection without the main protection;

(2) over-stable limit operation of the grid transmission section for more than one hour;

(3) cut-offs, loads, and oscillating detrainment, low-frequency and low-voltage unplanned shutdown of safety automatic devices, such as safety stabilizing devices, for more than 168 hours, resulting in a reduction of the safety level of the power grid;

(4) failure of the dispatch automation system of the dispatching institutions at the prefecture (municipal) level and above for more than one hour, and interruption of the communication of the dispatching communication system for more than two hours.

Interpretation of line, busbar, transformer main protection refers to the protection device that can instantaneously remove the entire line, busbar, transformer fault.

Unplanned outage means that the equipment is in a state of unavailability but not a planned outage.

Reduced level of grid security includes both situations where the grid falls below safe operating standards and situations where generation, transmission, and power supply schedules are forced to be modified in order to meet the safe operating standards of the grid.

The dispatch automation system malfunction of this article refers to the automation main station system being rendered unavailable for its main functions due to faults (including power supply failures), resulting in the dispatchers being unable to utilize the system for monitoring and controlling the power grid.

This article scheduling communication system communication interruption refers to the scheduling of a dedicated communication system due to failure (including power failure) unavailable, resulting in the scheduling organization and its jurisdiction over three and more plants and stations scheduling dedicated communication links are all interrupted.

5.2.4.5 Other general grid accidents that are recognized as Class B by the Company or its subsidiaries or sub-subsidiaries.

5.2.5 Grid Class I Obstacle

It does not constitute an accident, and if it meets one of the following conditions, it is a Grid Class I Obstacle.

5.2.5.1 Abnormal unlisting of 110kV and above power grid.

5.2.5.2 The occurrence of low-frequency oscillations in 220kV and above power grids lasting more than 3 minutes.

Interpretation of low-frequency oscillation refers to the phenomenon of sustained oscillation in the frequency range of 0.2 to 2.5Hz occurring in the power grid under small disturbances due to weak damping or negative damping.

5.2.5.3 A substation is forced to stop operation of any section of busbar of voltage level 220kV and above.

Interpretation of 220kV and above, "line transformer group", direct connection (no intermediate busbar) system, the main transformer outage applies to this article.

5.2.5.4 Reduction of power quality of the grid, resulting in one of the following consequences:

(1) frequency deviation exceeds the following values:

Installed capacity of 3000MW and above the frequency deviation of the grid exceeds 50 ± 0.2Hz, and the continuation of the time more than 20 minutes; or deviation exceeds 50 ± 0.5Hz, and the continuation of the time more than 10 minutes.

Installed capacity of 3000MW below the grid frequency deviation exceeds 50 ± 0.5Hz, and the continuation of more than 20 minutes; or deviation exceeds 50 ± 1Hz, and the continuation of more than 10 minutes.

(2) Voltage monitoring and control point voltage deviation exceeds ±5% of the voltage curve value stipulated by the grid dispatch, and the continuation time is more than 1 hour; or the deviation exceeds ±10%, and the continuation time is more than 30 minutes.

InterpretationWhen the scheduling uses the voltage control range instead of the voltage curve, the duration of the voltage overrun (over the upper limit or under the lower limit) is more than 1 hour, and this article also applies.

5.2.5.5 If one of the following situations occurs:

(1) the grid transmission section exceeds the stability limit for more than 15 minutes;

(2) the standby active power in the real-time operation of the Southern Grid and the provincial network is less than the following values for more than one hour:

Grid generation load Standby active power

(% of) (% is the proportion of the standby to the grid generation load)

40,000 MW and above 2% or the maximum stand-alone power within the grid

20,000 to 40,000 MW 3% or the maximum stand-alone power within the grid

10,000 to 20,000 MW 4% or the maximum stand-alone power within the grid

10,000 MW or below 5% or the maximum stand-alone power within the grid

10,000 MW 5% or the maximum stand-alone power within the grid

10,000 MW or less than 10,000 MW. Maximum single-unit output in the grid

Interpretation Standby active power refers to the rotating standby power on the generation side (including hydroelectric units and gas units that can be started immediately) that is connected to the busbar and is immediately available to carry the load, which is used to balance the instantaneous load fluctuation with the expected error.

(3) unplanned shutdown of safety automatic devices such as machine cutting, load cutting, oscillating detrainment, low-frequency low-voltage detrainment and other safety automatic devices for more than 72 hours, resulting in a reduction of the level of grid security;

(4) unplanned shutdown of the main protection of lines, busbars, and transformers at or above 220 kV, resulting in the unplanned operation of a single set of the main protection for more than 36 hours;

(5) unplanned shutdown of dispatching agencies at or above the prefecture (municipal) level and above the municipal level. ) level and above dispatching organizations dispatching automation system failure for more than 30 minutes, dispatching communication system communication interruption for more than 1 hour;

(6) unplanned shutdown of communication circuits, resulting in remote trip protection, remote cutter (cut load) device from dual-channel to single-channel for more than 30 hours.

5.2.6 Grid Type II Obstacles

The regulations for Grid Type II Obstacles are formulated by the Company's direct organizations or sub-subsidiaries themselves.

5.3 Equipment Accidents and Obstacles

5.3.1 Extremely Large Equipment Accidents

A person who meets one of the following circumstances is an extremely large equipment accident.

5.3.1.1 A single accident in a production unit causes damage to equipment, facilities, construction machinery, and means of transportation, and the direct economic loss of RMB 20 million yuan.

Interpretation of construction machinery, refers to large-scale lifting equipment, transportation equipment, excavation equipment, drilling equipment, tension traction equipment and so on.

The direct economic loss includes the costs incurred for replacement of spare parts, materials, labor and transportation. If the damage to the equipment can no longer be repaired, the cost of loss is calculated based on the replacement amount of the same type of equipment. The insurance company's compensation fee and the salvage value of the equipment cannot be offset against the cost of direct economic loss.

5.3.1.2 The direct economic loss reaches one million yuan in case of a fire in electric power production equipment or plant buildings.

Interpretation of the direct economic loss calculation method see the Ministry of Public Security November 16, 1998 release of the "fire direct property loss statistics method" (GA185-1998).

Electrical equipment arcing fire ignited insulation (including insulating oil), oil system (excluding oil tanks), powder system damage fire, etc., the above situation within the enterprise as equipment accidents. If the fire is affected by other equipment, materials, buildings (structures), it is recognized as a fire accident in electric power production.

5.3.2 Major equipment accidents

It is a major equipment accident if it does not constitute a major equipment accident but meets one of the following conditions.

5.3.2.1 In power plants with an installed capacity of 400MW and above, a single accident causes the unplanned shutdown of two or more units and the external blackout of the whole plant.

Interpretation "power plant" means a geographically independent power plant.

An accident resulting in the unplanned shutdown of two or more units, including the unplanned shutdown of one unit, and the unplanned shutdown of other units due to improper handling.

The external blackout of the whole plant means that the external active load of the power plant drops to zero. Although the load transferred by the grid through the busbar of the power plant has not stopped, it is still regarded as a plant-wide external blackout.

5.3.2.2 An accident in a production unit causes damage to equipment, facilities, construction machinery and transportation means, and the direct economic loss is RMB 5 million yuan or more but less than 20 million yuan.

5.3.2.3 electric power production equipment, plant building fire, direct economic loss of 300,000 yuan.

5.3.3 Class A General Equipment Accidents

Not constitute special or major equipment accidents, meet one of the following conditions, Class A general equipment accidents.

5.3.3.1 Grid 35kV and above transmission and substation equipment is forced to stop operation, and cause interruption of power supply to the user. class A general equipment accidents

Interpretation of interruption of power supply to the user, regardless of whether the user at the time of the power supply, are applicable to the article.

The interruption of power supply to consumers does not include the planned arrangement of power cuts, power restrictions and load adjustments for consumers.

It is not considered interruption of power supply to consumers if power supply to consumers is restored by successful reclosing of automatic line reclosing or operation of line or busbar self-provisioning.

5.3.3.2 Unscheduled shutdown of two or more units of a power plant, and causing external power outage of the whole plant.

5.3.3.3 Forced total shutdown of any voltage level busbar of 110kV and above at the power plant's booster station.

5.3.3.4 Forced shutdown of 200MW and above units of the power plant for more than 24 hours.

5.3.3.5 The hydroelectric power plant is unable to store water or release flood water normally in the reservoir or is otherwise damaged due to damage to hydroelectric equipment or hydroelectric buildings or other reasons.

5.3.3.6 production unit of an accident caused by equipment, facilities, construction machinery, means of transportation damage, the direct economic loss of RMB 500,000 yuan and above less than 5 million yuan.

5.3.4 Class B general equipment accidents

Not constitute a special, major equipment accidents, meet one of the following conditions, Class B general equipment accidents.

5.3.4.1 3kV and above power generation equipment, 6kV and above transmission and substation equipment, the following malignant electrical misoperation:

(1) mistakenly pull (close) the isolation switch with load;

(2) hanging (close) the grounding wire with electricity (grounding knife gate);

(3) closing the switch (isolation knife gate) with grounding wire (grounding knife gate).

5.3.4.2 Generating sets of 50MW and above, and transmission and substation main equipment of 35kV and above are forced to stop operation due to the following man-made reasons.

(1) General electrical misoperation:

Mistakenly (omission) pulling the switch closed, mistakenly (omission) casting or stopping the relay protection and safety automatic device (including the pressure plate), mistakenly setting the fixed value of the relay protection and safety automatic device;

Giving the wrong dispatching order, wrongly arranging the operation mode, wrongly giving the fixed value of the relay protection and safety automatic device, or wrongly giving the order of casting or stopping it;

(2) personnel mistakenly moving, mistakenly touching the equipment;

(3) heat engine misoperation: mistakenly stopping the unit, mistakenly (omission) opening (closing) the valve (flap), mistakenly (omission) throwing (stopping) auxiliary engines, etc.

(4) small animals touching the indoor equipment;

(5) personnel mistakenly (omission) connecting of relay protection and safety automation devices;

(6) Relay protection and safety automatic devices (including thermal protection, automatic protection) fixed value calculation, debugging errors;

(7) monitoring fault: personnel did not carefully monitor, control, adjustment, etc..

Interpretation of power generation, transmission and substation main equipment refers to:

(1) boilers, steam turbines, gas turbines, water turbines, pumped storage pump turbines, generators (including excitation systems), pumped storage power generation motors, regulating cameras (static compensation devices), frequency converters; the main hydraulic facilities and buildings (including dams, locks, pressurized water pipelines, tunnels, pressure regulating wells, cisterns , water canals, etc.).

(2) 35kV and above main transformers, busbars, reactors, switches, transmission lines (cables), combined appliances (GIS) and 220kV and above high-voltage plant transformers.

(3) Converters, converter transformers, AC filters, DC filters, leveling reactors, switches, grounding electrodes, series compensation equipment and so on.

5.3.4.3 500kV and above transmission and substation main equipment is forced to stop operation for more than 1 hour.

5.3.4.4 Unipolar blocking of DC transmission system for more than 1 hour.

5.3.4.5 Double-pole blocking of the DC transmission system.

5.3.4.6 Less than 200MW generating units, 110kV~220kV transmission and substation main equipment is forced to stop operation for more than 24 hours.

5.3.4.7 220kV and above switch, voltage transformer, current transformer, lightning arrester and other capacitive equipment explosion.

5.3.4.8 220kV and above transmission line tower collapse.

5.3.4.9 120MVA and above transformer winding insulation damage.

5.3.4.10 Defective main equipment of transmission and substation of 110kV and above, which stops operation with the consent of dispatch and takes more than 30 days to repair.

Interpretation of equipment "repair time" means the time from the start of the equipment out of service until the equipment is put back into operation or turned into standby.

Restoration of normal operation within 30 days using spare parts can also be considered as putting the equipment back into operation within 30 days.

5.3.4.11 Defective main equipment of 50MW and above power generation, which stops operation with the consent of dispatch, and the time for repair is more than 40 days.

5.3.4.12 One of the following occurs in the power generation equipment:

(1) Explosion of the furnace;

(2) Corrosion or burnout of the heating surface of the boiler, which requires replacement of the tubes or corrugated plates of the component (water-cooled wall, economizer, superheater, reheater, and preheater) for more than 5% of the total weight of the tubes or corrugated plates of the component;

(3) Boiler The pressure in operation exceeds 3% of the operating pressure of the working safety gate; the overspeed in operation of the steam turbine reaches more than 1.12 times of the rated rotational speed; the overspeed in operation of the hydraulic turbine reaches the rotational speed of the emergency closing of the guide vane or lowering of the gates;

(4) the explosion of the pressure vessel and the pressurized heat pipeline;

(5) the large shaft of the steam turbine of 100MW or above is bent, and it is necessary to carry out the treatment of the straight shaft;

< p>(6) 100MW and above turbine blade broken or through-flow part damaged;

(7) 100MW and above turbine water strike;

(8) 100MW and above turbine-generator unit, 50MW and above hydraulic turbine unit, pumped storage pump turbine unit, gas turbine and heat generator unit burned shaft tile;

(9) 100MW and above generator insulation damage.

5.3.4.13 electric power production equipment, plant buildings fire, the direct economic loss of 50,000 yuan.

5.3.4.14 Other general equipment accidents recognized as Class B by the company or sub-subsidiaries.

5.3.5 Equipment Class I Obstacle

The person who does not constitute an accident and meets one of the following conditions is an equipment class I obstacle.

5.3.5.1 The substation 10kV busbar abnormal operation or forced to stop the operation of the substation caused by less power delivery to the user.

5.3.5.2 35kV and above switch, voltage transformer, current transformer, lightning arrester and other capacitive equipment explosion.

5.3.5.3 Forced stoppage of generating units, 110kV and above transmission and substation main equipment.

5.3.5.4 Unipolar blocking of DC transmission system.

5.3.5.5 Abnormalities in the control system of the converter (inverter) station and the station power system cause the DC transmission system to send less power.

5.3.5.6 35kV and above transmission line tower collapse.

5.3.5.7 Damage to the insulation of the windings of transformers of 15 MVA and above.

5.3.5.8 Line faults of 220kV and above where the switch trips and is successfully reclosed by an automatic recloser.

5.3.5.9 Defective main equipment of power generation, transmission and substation, stopping operation with the consent of dispatch, but the equipment is out of operation for more than 168 hours.

5.3.5.10 The pumped storage unit is unable to pump water as specified by dispatch.

5.3.5.11 One obstacle of the production unit causes damage to equipment, facilities, construction machinery and transportation means, and the direct economic loss is RMB 100,000 yuan and above but less than 500,000 yuan.

5.3.6 Equipment Type II Obstacles

The regulations on equipment type II obstacles shall be formulated by the Company's direct subordinate organizations or branches and subsidiaries themselves.

6. Accident Attribution and Determination

6.1 Accident Attribution under Different Management Systems

6.1.1 Personal, grid and equipment accidents occurring in the production units directly, wholly-owned or controlled (including relatively controlled) by the company's directly-affiliated organizations or sub-subsidiaries of the company system are summarized as accidents of the corresponding companies and units.

6.1.2 Where property rights are separated from operation and management, the attribution of accidents shall be determined in accordance with the escrow agreement; where the escrow agreement is not clear, it shall be determined in accordance with the following principles:

(1) Personal accidents of employees of operation and management units shall be accidents of operation and management units.

(2) If the operation and management unit is responsible for the power grid and equipment accidents, it is an accident of the operation and management unit.

(3) Grid and equipment accidents in which the operation and management unit has no responsibility are property ownership unit accidents.

6.1.3 Personal accidents occurring in the work related to power production of the employees of a multi-operating enterprise managed by a power generation and supply unit of the company system and a company wholly owned, controlled or managed by such multi-operating enterprise shall be accidents of the power generation and supply unit.

Interpretation of this article refers to a variety of business units, including units with legal personality or independent accounting.

This article refers to the power supply unit management of a variety of business enterprises means that the main management personnel appointed by the power supply unit or in the power supply unit to take up positions.

6.1.4 Any enterprise contracted to work in a power supply unit of the Company's system that causes accidents in the power grid and equipment of the power supply unit is an accident of the power supply unit.

6.2 Determination of Accidents Involving Several Units

6.2.1 When an accident occurs in one generating and supplying unit, and another generating and supplying unit or units within the grid cause the accident to expand due to the fault of the unit, the latter unit or units shall each be designated as one accident. The company directly under the management of these generation and power supply units or branches and subsidiaries shall summarize the statistics as one accident.

6.2.2 In the event of a transient failure of a transmission line, which is caused by the failure of relay protection or substation equipment such as switches, it shall be classified as an accident of the unit which has jurisdiction over the substation equipment; in the event of a permanent failure of a transmission line, it shall be classified as an accident of the unit which has jurisdiction over the line, irrespective of whether or not the substation equipment is out of order.

6.2.3 Where a line is maintained by two or more units and the failure of the line to trip constitutes an accident, it shall be classified as an accident in each case if no point of failure is found by any of the units after inspection.

Interpretation of a line by two or more units responsible for maintenance, the line tripped, if one side provides a fault recording map (or fault rangefinder records, the same below), calculated fault point in the other side, and the other side failed to provide a fault recording map, the two sides by the scene inspection, although the fault point has not been found, then set as an accident of the side that did not record the wave.

If a party provides a fault recording map, the calculated point of failure in the side, the other side of the recording equipment and failed to provide a fault recording map, the two sides of the accident as an accident.

When the results calculated by analyzing the recording diagrams of both sides are contradictory, then each side is designated as an incident.

6.2.4 If the abnormal operation of generation and power supply equipment causes an accident due to the negligence of the employees of the grid dispatching organization, such as giving wrong dispatching orders, arranging improper operation modes, fixing wrong values of protection and other fixed values, mistakenly activating or mistakenly touching the equipment, or monitoring negligence, the dispatching organization shall be regarded as an accident. If the generation and power supply unit is also at fault, it should also be recognized as an accident.

6.3 The identification of accidents that meet the conditions of multiple accidents at the same time.

6.3.1 If an accident meets the conditions of both grid accidents and equipment accidents, it shall be recognized in accordance with the principle that accidents of different grades are selected as high grade accidents, and accidents of the same grade are selected as grid accidents.

Interpretation of an accident that meets the conditions of both Class A general grid accidents and Class A general equipment accidents, the selection of Class A general grid accidents.

An accident that meets both category A general equipment accidents and category B general grid accidents or category B general equipment accidents, selected category A general equipment accidents.

6.3.2 Grid or equipment accidents accompanied by personal accidents shall be recognized as a personal accident, grid or equipment accident respectively.

6.4 Determination of multiple accidents due to the same cause:

6.4.1 When multiple accidents occur on a line due to the same cause within 24 hours, it can be recognized as one accident.

6.4.2 The same power supply unit may be recognized as one accident when multiple lines and substations trip and stop due to natural disasters, such as ice-covering, windstorm, flood, earthquake, mudslide, fire and lightning damage.

When the same natural disaster triggers the tripping of multiple lines, substations and shutdown of power generation equipment of several power generation and supply units belonging to the same company's directly-affiliated organization or sub-subsidiary to constitute an accident, each of these power generation and supply units shall be deemed to have an accident; and the directly-affiliated organization or sub-subsidiary that manages these power generation and supply units shall be summarized as an accident.

6.4.3 If, due to poor quality of coal (oil), wet coal, etc., several fire-fighting stoppages and reduction of output occur in a power plant during the duty time of one operation shift, it can be recognized as one accident