Distribution room management system

In order to implement the policy of safety first and ensure the safe and normal operation and service quality of the power supply system in the community, the power distribution room management system is formulated.

1 The personnel responsible for the operation, inspection and maintenance of the power supply system must hold relevant certificates and be familiar with electrical equipment and related safety measures.

2, the transformer room to establish a 24-hour duty system, the power distribution equipment and high pressure room patrol once every 4 hours, and make patrol records; Handle problems in time when found, and indicate them in the duty record and patrol record; Report the unsolvable problems to the foreman and department manager in time.

3. Full-time personnel are responsible for the management and duty of power distribution equipment, and the stop of power distribution equipment is operated by electricians on duty, and it is forbidden for non-duty electricians to operate. For complex switching operation, the operation ticket system and monitoring system must be implemented, and it is forbidden to operate the high-voltage ring in and out of the cabinet. Electrical insulating tools, shoes, gloves, etc. It must be used in accordance with regulations during operation and maintenance. Warning and marking shall be made for the switch status of high and low voltage cabinets. The personnel on duty must make a good record of duty and do a good job of succession.

4. The foreman shall make statistics, drawing and analysis on the inspection records and meter reading records, monitor the running state of the system, diagnose the system faults and formulate energy-saving measures.

5, power failure, should inform the user in advance; When power transmission is resumed, it is necessary to confirm that the power supply line is normal and the electrical equipment is in good condition before power transmission can begin.

6. The change of equipment and wiring in the distribution room shall be approved by the engineering department of the company; Major changes should be reported to the company leaders for approval.

7. The room temperature of the distribution room shall not exceed 40 degrees Celsius. Fire fighting facilities should be inspected regularly, kept in good condition and effective, and equipped with hand-held gas fire extinguishers. Pay attention to prevent small animals from entering; Irrelevant personnel must get permission from the company leader to enter.

8. Strengthen daily cleaning, maintenance and overhaul to ensure that the power supply and distribution system is normal and the supporting facilities, equipment and devices are in good condition.

Emergency plan for distribution room

The emergency plan of the distribution room can only be based on the working mode of the power supply system of the distribution room and the operation mode of the upper and lower distribution rooms. According to the load classification, the emergency plan of each distribution room is different. Therefore, I will provide you with a guide to the preparation of emergency plans, and write it according to the specific situation.

Guide for compiling emergency plan for substation accident treatment

First, the principle of accident treatment

1. Quickly limit the development of accidents, eliminate the root causes of accidents, remove the threat to people and equipment, and ensure the normal operation of other equipment;

2. Restore the power supply to the power outage users as soon as possible;

3. If it poses a threat to people and equipment, it should be removed immediately, and the equipment should be stopped immediately if necessary. If it does not pose a threat to people and equipment, we should try our best to maintain or restore the normal operation of the equipment, and pay special attention to isolate the equipment that is not directly damaged to ensure its normal operation.

Second, the general steps of accident treatment

1. Record the accident time, lights, card drop and related loads in detail;

2. Report to the competent leaders and departments;

3. Determine the nature of the accident and handle the accident according to the plan;

4. According to the inspection and test, according to the scheduling instructions to restore power;

5. Record the accident handling in detail.

Three, the preparation of all kinds of accident treatment plan outline

1. Personal injury accident treatment plan

1. 1 personal electric shock accident

According to the operation mode, in the case of minimum power failure, operators should be isolated from live equipment (including primary and secondary equipment) as much as possible, and at the same time, emergency measures such as on-site cardiopulmonary resuscitation and mouth-to-mouth resuscitation should be taken.

1.2 Personal poisoning accident

Under the premise of ventilation and exhaust, ensuring smooth air flow, and rescuers correctly carrying out their own safety protection, the poisoned personnel shall be isolated from the poison source. In case of food poisoning, pay attention to take suspicious food for testing.

1.3 personal accident hit by an object

Carry out correct on-site treatment in strict accordance with the emergency principle and call for help immediately.

1.4 falling accident

Note: All the above accident plans must first ensure the safety of rescuers. During the rescue process, call for help to 120 in time and report to the superior.

2. Power grid accident treatment scheme

3. 1 misoperation accident

Misoperation accidents may cause casualties, equipment accidents and power grid accidents, and should be handled according to the situation. If the misoperation does not cause casualties, it should immediately notify the main control room and tell the clear man-made fault point, so that the personnel on duty can quickly resume operation. If there are casualties, the main control room should send people to check the scene as soon as possible according to the protection action number and the work arrangement at that time, and start the electric shock accident treatment plan for rescue. When a power grid accident occurs, it should report the situation and dispatch quickly, and handle the accident according to the instructions.

2.2 Power failure of the main power supply of the whole station (considering the accident treatment scheme after the communication is also interrupted at this time)

In accordance with the relevant provisions of the scheduling program for processing.

2.3 Bus full stop accident of voltage levels at all levels

2.4 Two power supply lines running in parallel trip once.

2.5 resonance causes an accident that the bus voltage of substation suddenly rises or falls.

3.6 bus failure

Bus fault should be judged according to the protection action, whether it is bus differential action or transformer backup protection action tripping, and then carefully check bus equipment (including supporting insulators, bus PT, etc. ) there are traces of flashover or foreign bodies. According to whether the bus can be put into operation in a short time, the recovery process after isolation from the operating system is considered.

2.7 line grounding fault

For example, medium and low voltage transmission lines (systems) are grounded in single phase or in different phases, and the neutral point is not directly grounded, mainly to control the grounding time and find the grounding location.

3.8 Failure protection action

Correctly judge the loop that failed to start and notify the corresponding dispatcher of the primary and secondary anomalies, and wait for the dispatching command to resume.

2.9 busbar voltage loss caused by line fault tripping.

2. 10 low frequency and low voltage load shedding device action

Report load rejection and action rounds correctly.

Focus on checking whether the air cooling circuit and DC circuit of strong oil circulation are normal. When the load is not large and the temperature is not high, exit the main transformer linking piece first and use the low-voltage standby circuit at the checkpoint. The rest of the scheduling instructions.

3. Equipment accident treatment plan

3. 1 Treatment scheme for abnormal transformer accidents

3. 1. 1 Emergency shutdown of main transformer

According to nine requirements of transformer management regulations of provincial companies.

3. 1.2 Transformer overload

3. 1.3 transformer protection actions (light and heavy gas actions, differential protection actions, overcurrent and zero sequence protection actions, etc.). )

3. 1.4 The cooling system of the main transformer stops completely and the temperature is abnormal.

3. 1.5 Fault of on-load voltage regulating mechanism of main transformer

3. 1.6 The oil leakage of the main transformer is serious and the oil level is abnormal.

3. 1.7 The connection part of the main transformer has serious fever.

3. 1.8 Abnormal sound of main transformer

3. 1.9 External abnormality of main transformer

3. 1. 10 false oil level in main transformer, oil leakage in oil storage tank.

3. 1. 1 1 Two main transformers run in parallel, and one of them trips.

3.2 Accident Treatment Scheme for Abnormal Switching Equipment

3.2. 1 circuit breaker mechanism (handling in case of abnormality)

According to the type of mechanism, such as air leakage, pressure relief of pneumatic mechanism, pressure relief of hydraulic mechanism, abnormal nitrogen pre-pressure, no energy storage of spring mechanism, jamming of electromagnetic mechanism, etc.

3.2.2 Outgoing line, tie line circuit breaker and main transformer circuit breaker refused to trip.

3.2.3 Breakage accident of pillar insulator occurred in circuit breaker and disconnector.

3.2.4 The oil circuit breaker is seriously short of oil in operation.

3.2.5 During operation, the operating circuit breaker refuses to open or close (such as mechanism closing or control circuit failure).

3.2.6 Various abnormal signals in the operation of SF6 circuit breaker.

3.2.7 There is continuous discharge sound or abnormal discoloration in the arc extinguishing chamber of vacuum circuit breaker during operation.

3.2.8 During operation, the isolating switch cannot be opened and closed normally.

3.2.9 The connection parts of circuit breakers, disconnectors and other equipment are seriously heated.

3.2. 10 SF6 equipment has serious air leakage fault.

3.3 Accident treatment scheme in case of system failure

3.3. 1 battery failure (such as battery explosion, internal open circuit, etc.). )

3.3.2 Treatment after direct power loss of the whole station

For example, the main fuse (switch) of the closing and control circuit is blown (tripped), and various signal indicators are extinguished.

3.3.3 Serious DC grounding fault

3.4 Accident treatment scheme in case of secondary equipment failure

3.4. 1 Protection put into operation and automatic device fault and exception handling.

3.4.2 Failure of indicating instrument in operation (such as red light and green light not on)

3.4.3 Central signal circuit failure (such as power fuse)

3.4.4 The centralized control center cannot remotely switch the unattended station, and the monitoring data will not be refreshed.

3.4.5 Communication interruption of the whole station.

3.5 Fault Treatment Scheme for Combined Electrical Apparatus

3.5. 1 Treatment scheme for large gas leakage or abnormal pressure increase

3.5.2 Emergency stop of combined electrical appliances

3.6 Anti-misoperation locking device failure

3.7 Explosion accidents caused by resonance, overload, flashover, insulation breakdown and short circuit of electrical equipment.

3.8 Fire accident (such as main transformer, switch cabinet, cable trench and room fire)

4. Accident treatment scheme for other factors affecting the safe and stable operation of substation.

4. 1 Accidents in special operation mode and special operation of substation.

4.2 Accidents caused by various small-scale operations (such as insufficient safety distance from live equipment during construction, tools with metal objects, metal objects touching live bodies by mistake, improper excavation, damage to grounding grid or cable, etc.). ).

4.3 Accidents caused by natural disasters (such as earthquakes)

4.4 Accidents that seasonal factors affect the safety of equipment in the station (such as strong wind in spring, thunderstorm in summer, bird damage in autumn, heavy load in winter, serious pollution, etc.). )

4.5 Substation is damaged by external force

Operating procedures of power distribution room

1, the electrician on duty must abide by the general provisions of electrician operation, be familiar with the performance and operation methods of various equipment in power supply system and distribution room, and have the ability to take measures under abnormal circumstances.

2. The electrician on duty is strictly forbidden to leave without leave, and must strictly implement the patrol system on duty, the brake switching operation system, the work operation system, the succession system, the use management system of safety appliances and fire fighting equipment and the access system.

3, high voltage distribution room on duty must abide by the high voltage distribution equipment operation procedures.

4. No matter whether the high-voltage equipment is charged or not, the personnel on duty shall not move alone or work across the barrier. If it is necessary to remove obstacles, a guardian must be present, and keep them at a safe distance from the equipment without power failure.

5, thunderstorm weather need to patrol outdoor high-voltage equipment, should wear insulating boots, shall not be near the lightning arrester and lightning rod.

6, patrol power distribution device, in and out of the high pressure chamber, must take the door.

7, contact with the power supply unit or user (dispatcher), to stop, send the brake operation, the person in charge on duty must contact content and contact name repeatedly check and make records.

8, power switch operation must be carried out in accordance with the oil switch (or load switch, etc.). ), the breaker on the load side and the breaker on the bus side are operated in turn, and the order of power closing is the opposite. Guard against on-load switching.

9. Switching operation on high-voltage equipment and large-capacity low-voltage main panel must be carried out by two people, and a person familiar with the equipment shall be the guardian. Remote control or partition operation of oil switch and breaker (and oil switch interlock device) can be operated by one person. Persons who are allowed to patrol high-voltage equipment alone and act as guardians must be approved by the person in charge of the equipment power department.

10. Wear protective glasses and insulating gloves when closing the high voltage circuit breaker with insulating rod or closing the high voltage brake through transmission mechanism. When operating outdoor high-voltage equipment in rainy days, the insulating rod should have a rain cover and wear insulating boots to stand on the insulating platform. Switching operation is prohibited during lightning.

1 1. When loading and unloading high-voltage fuses, you should wear protective glasses and insulating gloves, use insulating pliers if necessary, and stand on insulating pads or platforms.

12, after the power failure of electrical equipment, before the switch is turned on and safety measures are taken, it should be considered that there is electricity. It is forbidden to touch the equipment and enter obstacles to prevent sudden calls.

13. In case of power failure or partial power failure during construction and maintenance, the personnel on duty should take safety measures according to the requirements of the working ticket, including power failure, electricity inspection, installation of temporary grounding wire, switch locking, installation of barrier and hanging warning signs, and check with the person in charge of field work to confirm that there is no electricity, and both parties can apply for permission to start work after explaining the location and precautions of nearby live equipment.

14. When the work is over and the staff are evacuated, the person in charge of the work should explain clearly to the personnel on duty and check with them. The personnel on duty can remove the security measures and resume power transmission only after the two sides apply for visas at the end of work. It is forbidden to power off or send electricity at an appointment.

Before the end of the work, the personnel on duty shall not connect the power supply of the construction equipment.

15. When power is cut off, cut off the power supply of each circuit that may call. You can't just turn on the circuit breaker to work. You must turn on the isolation circuit breaker so that each circuit has at least one obvious disconnection point. Transformers and voltage transformers must be disconnected from the high and low voltage sides. The primary and secondary fuses of voltage transformer should be removed. The operating power supply of the circuit breaker should be disconnected. The operating handle of the knife switch should be locked.

16, electroscope must be qualified products, and must adapt to the voltage level, in the maintenance equipment in and out of the line on both sides of the electricity respectively. Before checking electricity, it should be tested on live equipment to prove that the electroscope is good. Insulating gloves must be worn when checking the electricity of high-voltage equipment.

17. When it is confirmed that the equipment has no voltage, the maintenance equipment should be grounded and short-circuited with each other immediately with conductors. All circuits that may supply power to power-off equipment or components that may generate induced voltage shall be equipped with grounding wires. The grounding wire shall be multi-stranded bare soft copper wire with a cross-sectional area of not less than 25mm2. The grounding wire must be fixed on the conductor with a special wire clamp, and it is forbidden to ground and short circuit by winding. When installing the grounding wire, the grounding terminal must be connected first, then the conductor terminal, and the disassembly sequence is reversed. Insulating rods and gloves should be used when installing and removing grounding wires. The assembly and disassembly work must be carried out by two people. Maintenance personnel are not allowed to remove and replace the grounding wire by themselves. The grounding wire should be numbered and placed in a fixed place. The installation and disassembly of grounding wire should be recorded, and it should be made clear when it is handed over.

18. When working on the circuit of the capacitor bank, the capacitors must be discharged one by one.

19. Warning signs "No closing, someone is working" should be hung on the operating handles of circuit breakers and knife switches. Once these circuit breakers and knife switches are closed, they can send electricity to the workplace. Warning signs of "Stop, high voltage danger" should be hung on the fences of live equipment on both sides of the workplace and on the aisles that are not allowed to pass. Warning signs "Work here" should be hung in the workplace.

20, near the low voltage live equipment patrol, inspection, must meet the safe distance, guardianship by designated personnel. Live equipment can only be in front of or on one side of the staff, otherwise the power should be cut off.

2 1. When working on the secondary circuit of the live current transformer, it is necessary to prevent the secondary side of the current transformer from being open to generate high voltage. When disconnecting the current loop, it is necessary to short-circuit the special terminal on the secondary side of the current transformer with a short tab or short circuit. It is forbidden to wind wires. Never disconnect the permanent grounding point of the loop during operation. There must be a special person to supervise the work, insulating tools should be used, and standing on the insulating mat.

22. In case of personal electric shock accident and fire accident, the personnel on duty should immediately disconnect the power supply of relevant equipment according to the operation procedures, so as to facilitate the rescue, but they must immediately report to the superior afterwards and make records.

23, electrical equipment on fire, should use carbon dioxide fire extinguisher or 12 1 1 fire extinguisher. When the transformer is on fire, it is necessary to cut off all the surrounding power before using foam extinguisher to put out the fire. Grid bars should be added at the entrance of doors and windows of power distribution room and cable trench to prevent small animals from entering.