How to patrol high voltage
2.2.2 In thunderstorm weather, when it is necessary to patrol outdoor high-voltage equipment, insulating boots should be worn, and lightning arresters and lightning rods are not allowed.
2.2.3 In case of fire, earthquake, typhoon, ice and snow, flood, debris flow, sandstorm and other disasters, necessary safety measures should be formulated and approved by the leaders in charge of the equipment operation unit, with at least two people as a group. Patrol personnel should keep in touch with the dispatched departments.
2.2.4 When the high-voltage equipment is grounded, it is forbidden to approach the fault point within 4m indoors and 8m outdoors. Personnel entering the above range should wear insulating boots and gloves when contacting the equipment shell and frame.
2.5.5 Patrol the indoor equipment and close the door behind you.
2.5.6 There shall be no less than 3 keys in the high-pressure chamber, which shall be kept by the operators and handed over according to the value. 1 for emergency use only, 1 for operators only. Others can be lent to the approved patrol personnel of high-voltage equipment and the work leaders of the approved maintenance and construction teams, but they must be registered and signed, and returned after the patrol or the end of the day.
2.3 pour brake operation.
2.3. 1 switching operation shall be carried out according to the instructions of the on-duty dispatcher or the person in charge of operation, after repeated verification. Release instructions should be accurate and clear, using standardized scheduling terms and dual names of equipment, namely equipment name and number. The sender and the receiver shall report the unit and name to each other first, and both parties shall record the whole process of issuing instructions (including the repeated instructions of the other party), and make records when listening to the instruction report. Operators (including guardians) should know the purpose and sequence of operations. When in doubt about the instruction, you should ask the sender and carry it out after being clear.
2.3.2 Switching operation can be completed by local operation, remote control operation and program operation. The equipment for remote control operation and program operation shall meet the relevant technical conditions.
2.3.3 Classification of switching operation.
2.3.3. 1 monitoring operation: two people perform the same operation.
In the monitoring operation, one of them will monitor people who are familiar with the equipment. Particularly important and complicated switching operation should be operated by skilled operators and supervised by the person in charge of operation duty.
2.3.3.2 solo surgery: surgery performed by one person.
1) When the substation or power plant booster station is operated by one person on duty, the operator shall fill in the operation ticket according to the operation instruction conveyed by the sender's phone and repeat it correctly.
2) The equipment, projects and operators operated by one person shall be approved by the equipment operation management unit, and the personnel shall pass the special examination.
2.3.3.3 Maintenance Personnel Operation: Operation completed by maintenance personnel.
1) The maintenance personnel of this unit who have passed the examination by the equipment operation unit can monitor the electrical equipment of 220kV and below from hot standby to maintenance or maintenance to hot standby. The guardian shall be the maintenance personnel or equipment operators of the same unit.
2) The sending and receiving procedures and safety requirements of maintenance personnel shall be examined and approved by the chief engineer of the equipment operation unit, and reported to relevant departments and dispatching institutions for the record.
2.3.4 Operation ticket
2.3.4. 1 switching operation shall be completed by the operator (see appendix a).
2.3.4.2 operation ticket should be filled in item by item with black or blue steel (water) pen or ballpoint pen. The operation ticket issued by the computer should be unified with the handwritten ticket face; The face of the operation ticket shall be clear and tidy, and shall not be altered at will. The operation ticket should fill in the dual name of the equipment, that is, the equipment name and number. The operator and guardian should check the filled-in operation items according to the simulation diagram or wiring diagram, and sign them manually or electronically respectively, and then the person in charge of the operation duty (the person in charge of the maintenance personnel's operation) will sign them.
Each operation ticket can only fill in one operation task.
2.3.4.3 operation ticket should fill in the following items:
1) Equipment to be combined 【 circuit breaker (switch), disconnector (circuit breaker), grounding breaker (device), etc. 】, check the electricity, install and disassemble the grounding wire, close (install) or disconnect (remove) the air switch and fuse of the control circuit or voltage transformer circuit, switch protection circuit and automation device, and check whether there is voltage, etc.
2) Close the equipment [circuit breaker (switch), isolating switch (circuit breaker) and grounding breaker (device)] and then check the equipment position.
3) When stopping or sending power, check that the circuit breaker (switch) is in the break-off position, and then close the isolating switch (circuit breaker) and handcart switch.
4) Before and after load rejection, column disconnection and parallel operation, check the related power supply operation and load distribution.
5) After equipment maintenance, before connecting the power supply, check that the grounding breaker (device) within the power supply range has been opened and the grounding wire has been removed.
6) Start and stop of HVDC transmission system, power change and state transition, control mode change, master station switch, control and protection system switch, converter transformer cooler switch and tap manual adjustment.
7) Valve cooling, valve hall fire fighting and air conditioning system switching, mode change and other operations.
8)DC transmission control system locks the circuit breaker.
2.3.5 Basic conditions for switching operation.
2.3.5. 1 There is a primary system simulation diagram (including various electronic wiring diagrams) consistent with the field primary equipment and actual operation mode.
2.3.5.2 operating equipment should be clearly marked, including naming, numbering, opening and closing instructions, rotation direction and switch position instructions, equipment color, etc.
2.3.5.3 high-voltage electrical equipment should be equipped with a perfect locking device to prevent misoperation. The anti-misoperation locking device shall not be withdrawn from operation at will, and the deactivation of the anti-misoperation locking device shall be approved by the administrative deputy or chief engineer in charge of production of the unit; When the anti-misoperation locking device is withdrawn in a short time, it should be approved by the substation stationmaster or the shift supervisor of the power plant, and put into operation as soon as possible according to the procedure.
2.3.5.4 has the official instructions from the dispatcher on duty and the person in charge of operation duty.
And use the pre-approved operation ticket.
2.3.5.5 should add mechanical locks in the following three cases:
1) circuit breaker handle, valve hall door and net door are not installed to prevent misoperation or failure of locking device.
2) When the electrical equipment is in cold standby, when the lock of the screen door fails, there is an electric partition screen door.
3) When the equipment is overhauled, the operating handle of each incoming circuit breaker in the loop and the door of the mechanism box of the electric circuit breaker.
The mechanical lock needs 1 key to open 1 lock, and the key should be numbered and kept properly.
2.3.6 Basic requirements for switching operation:
2.3.6. 1 Power outage operation shall be conducted in the order of circuit breaker (switch), load side isolating switch (circuit breaker) and power side isolating switch (circuit breaker), and power transmission and closing operations shall be conducted in the reverse order. It is forbidden to close the disconnector (circuit breaker) with load.
Before 2.3.6.2 starts running, check the simulation preview (or microcomputer error prevention device and microcomputer monitoring device) on the simulation diagram before running. Before operation, check the system mode, equipment name, number and location. When operating, carefully implement the system of listening and repeating (single person should also sing loudly), and it is appropriate to record the whole process. During the operation, the operation should be carried out item by item in the order of filling in the operation ticket. After each step of operation is completed, mark it with "√" after checking that it is correct, and check it again after all operations are completed.
2.3.6.3 guardianship operation, the operator is not allowed to have any operation behavior without the consent of the guardian during the operation.
When there is any doubt about 2.3.6.4's operation, immediately stop the operation and report to the sender. This operation can only be carried out after the sender obtains permission again. Don't change the operation ticket without authorization, and don't dismantle the locking device at will. Unlocking tool (key >；; It shall be sealed and kept, and all operators and maintenance personnel are prohibited from using the unlocking tools (keys) without authorization. When it is necessary to unlock under special circumstances, the operator can use the unlocking tool (key) to report to the dispatcher on duty only after the special person from the operation management department arrives at the scene to verify the signature. In the process of switching operation, it is forbidden for a single operator and maintenance personnel to unlock. If unlocking is needed, additional operators should be sent to the site to perform the above procedures. Unlocking tool (key >；; It should be sealed in time after use.
The position inspection of electrical equipment in 2.3.6.5 after operation shall be based on the actual position of the equipment. If you can't see the actual position, you can judge it by mechanical position indication, electrical indication, on-site display device, instrument and changes of various telemetry and telecommunication signals. When judging, there should be two or more instructions, and all the instructions have changed correspondingly at the same time, so as to confirm that the equipment has been operated in place. The above inspection items should be filled in on the operation ticket as inspection items.
The DC system of 2.3.6.6 Converter Station should be operated by program, but the program operation was unsuccessful. After finding out the reason and obtaining the permission of the dispatcher on duty, the remote step-by-step operation can be carried out.
2.3.6.7 should wear insulating gloves when closing the isolating switch (circuit breaker) and high-voltage fuse with insulating rods or closing the circuit breaker (switch) and isolating switch (circuit breaker) through the transmission mechanism. When operating outdoor high-voltage equipment in rainy days, the insulating rod should have a rain cover and insulating boots. If the grounding grid resistance does not meet the requirements, wear insulating boots on sunny days. When lightning strikes, switching operation is generally not carried out, and local switching operation is prohibited. 2.3.6.8 should wear goggles and insulating gloves when loading and unloading high-voltage fuses, use insulating tongs when necessary, and stand on insulating pads or platforms.
The breaking capacity of 2.3.6.9 circuit breaker (switch) should meet the requirements of power grid. If the breaking capacity is not enough, the operating mechanism (operating mechanism) should be separated from the circuit breaker (switch) by a wall or a metal plate for remote operation, and the reclosing device should be stopped.
2.3.6. 10 after the power failure of electrical equipment (including accidental power failure), it is forbidden to touch the equipment or enter obstacles before opening the relevant isolating switch (circuit breaker) and taking safety measures to prevent sudden calls.
2.3.6. 1 1 climbing or pole climbing is not allowed when working alone.
2.3.6. 12 In case of personal electric shock accident, you can disconnect the power supply of relevant equipment without permission, but you should immediately report to the dispatcher (or equipment operation management unit) and the superior department afterwards.
2.3.6. 13 when the system communication between converter stations at both ends of the same DC system fails, the operation between the two stations shall be carried out according to the instructions of the on-duty dispatcher.
2.3.6. 14 When the bipolar DC transmission system is stopped for maintenance, it is forbidden to operate the equipment in the bipolar public * * * area, and it is forbidden to close the grounding/metal circuit isolating switch (circuit breaker) that closes the extremely neutral line.
2.3.6. 15 before increasing the power of the DC system, it should be confirmed that the power setting value is not less than the minimum power allowed by the current system and cannot exceed the maximum power limit allowed by the current system.
2.3.6. 16 before manually cutting off the AC filter (shunt capacitor), check whether the system has enough spare capacity to ensure that it can meet the current reactive power demand.
2.3.6. 17 AC filter (shunt capacitor) shall meet the capacitor discharge time requirements after it is put into operation again.
2.3.7 The following work can be carried out without operation ticket:
1) Emergency handling of accidents.
2) Single operation of closing the circuit breaker (switch).
Records should be made after the above operations are completed, and the original records should be kept for emergency treatment of accidents.
2.3.8 The operation tickets of the same substation shall be numbered consecutively in advance, and the computer-generated operation tickets shall be numbered consecutively before the official ticket issuance, and the operation tickets shall be used in numerical order. Invalid operation tickets should be marked with the word "invalid", those that have not been executed should be marked with the word "unexecuted", and those that have been executed should be marked with the word "executed". The operation ticket shall be kept for one year.
2.4 Work on high-voltage equipment.
2.4. 1 working on high-voltage equipment in use can be divided into three categories:
2.4. 1. 1 All power outages refer to all indoor high-voltage equipment power outages (including overhead lines and cable incoming lines), all doors leading to adjacent high-voltage rooms are locked, and all outdoor high-voltage equipment power outages (including overhead lines and cable incoming lines).
2.4. 1.2 local power failure refers to local power failure of high-voltage equipment or indoor power failure, but all doors leading to adjacent high-voltage rooms are not locked.
2.4. 1.3 Work without power failure refers to:
1) The work itself does not need a power outage, and it is impossible to touch the conductive part.
2) Work that can be carried out on the shell or conductive part of live equipment.
2.4.2 When working on high-voltage equipment, it should be carried out by at least two people, and there are organizational and technical measures to ensure safety.