(4)Failure to operate of circuit breaker (when the bus-bar separation relay and the system separation relay operate)
(5)Transmission transformer failure (when the protective relay operates)
(6)Distribution transformer failure (when the protective relay operates)
(7)Generator failure (when the protective relay operates)
(8)Phase modifier equipment failure (when the protective relay operates)
(9)Other main equipment failure (when the protective relay of starting transformer and the desulfurization equipment transformer, etc operate)
Chapter 2 OPERATION ON ENERGIZING AND DE-ENERGIZING
ELECTRICAL EQUIPMENT
Article 399. Connection diagram of equipment
The operator of the equipment for power station and substation equipment shall install the load dispatching panel that can confirm the switching condition etc. of operational target equipment in order to operate the equipment certainly.
For the switching condition of the equipment of the load dispatching panel shall be preferable that the switching condition of a local equipment is automatically reflected online, but in case of off-line information, it shall certainly reflect the switching condition in the panel after operating on site.
Chapter 3 OPERATOR
Article 400. Operator
It is indispensable to perform the unifiedoperation of power generating facility, transmission and distribution and substation facility in order to supply the electric power with stability.This unified operation is carried out by a load dispatch center, apower station, and a distribution company, etc. , and achieves stable electric power supplies.
Therefore, the operator of these organizations shall appropriately be selected among the candidates who not only have knowledge of system operation and varioustarget equipment but also can take proper responses against accidents.
Article 401. Maintenance of equipment for power sector
There are the following two kinds of maintenance of the power equipment.
-Repair: Restoration of a broken, damaged, or failed device to an acceptable operating or usable condition.
-Periodical inspection: Inspection that is carried out periodically and repeatedly.
As for the maintenance, It is desirable to decrease the frequency of equipment outage and to narrow the area of equipment outage in terms of service reliability.
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Therefore, it shall be necessary to plan the schedule of repair and inspection with equipment outage in consideration of the following items.
- Simultaneous implementation of work with the same equipment Foutagerxample,( simultaneous implementation of the periodic inspection and the repair)
-Simultaneous implementation of work ithw the same area equipment outageFor( example, simultaneous implementation of inspection of thecircuit breaker and cubicle which are stopped with inspection of a transformer)
Article 402. Responsibility for supervise and maintenance of equipment and machineries
The operator of the load dispatching center, the power station and substation shall alwaysgrasp the following items using the load dispatching system, etc in order to operate the power system appropriately and smoothly, prevent the fault of various equipment and keep the quality of electricity.
-Operation condition of the generator and the transmission and substation equipment
-Demand and supply balance
-Power system condition of frequency, voltage and the power flow, etc.
Article 403. Inspection of facilities for operation
For smooth supervisory control, the essential equipment for power system operation, such as the SCADA system and attendant communication equipment shallsatisfy the specification provided in
the related regulations, in addition, these equipment shall carryout the periodic inspection and repair in common with the power equipment. But the inspection contents and quality control,shalletc. observe the related regulations, etc.
Chapter 4 DISPATCHING AND CONTROLLING DEVICES
Article 404. Load dispatching and controlling devices
The provisions of this article shall refer to the Article 403.
Article 405. Telecommunication equipment and remote control system
The provisions of this article shall refer to the Article 403.
Article 406. Operation of telecommunication network, remote system and communication transmission system
The essential equipment for power system operation, suchvariousas |
control |
system |
and |
the |
|
protective relay |
shall be operated integrally with communication facilities. Therefore, the load |
||||
dispatching center and the operational section of the power station and substationshall always grasp |
|
||||
the condition of |
communication circuit. In case that the fault of communication |
circuit |
occurs, |
the |
|
above operational section shall ask the communication section to repair and maintain it.
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When the communicationsection offers the communication circuit’s stop for thepower system operation to the load dispatching center, the operator shall stops the operation of related equipment such as the protective relay, etc by the load dispatching instruction. After that, the communication section stops the communication circuit.
Article 407. Documents for load dispatching and controlling devices
It is preferable that the load dispatching center and the operational section of power station and substation equip the related documents thatare necessary for operations, in addition compile various equipment operational manual for the daily operation and the accident response, based on the above documents.
Article 408. Protection for landline telecommunication devices
A lot of communication wires that connect to the landline telecommunication devices are joint use of distribution line. Therefore, these devices might be broken by the surge voltage etc. Therefore, it shall be necessary to implement the protective measures which satisfy the related regulations cluding "Regulations on protecting landline telecommunication devices of power system from voltage impact and hazardous current"
Article 409. Standby supply sources for load dispatching and controlling devices
Both DC and AC power supply for various load dispatching equipment shall be dual system.
In addition, these power supplies shall change to the reserve system without interruption of power supply at the time of the trouble of the active system. For more information about power supply specifications, the related regulations including "Instructions on designing power supply source for dispatching and controlling devices in power system" shall be followed.
Article 410. Inspection of load dispatching and controlling devices
The load dispatching center and the operational sectionof power station and substationshall inspect the load dispatching and controlling devices according to the Article 403 of guidelines.
In addition, as for confirming of the regular position of various switches and the fault indicators, etc,
It is preferable that regular position of various switches, etcare described in the operational manual and the regular positioning seal (refer to the following figure) is attached to various switches and indicator etc, to confirm quickly and certainly without false recognition.
[The example of attachment of a regular position seal]
-Attachment example to various switches
The red seal is pasted in regular position of the switchinadvance. when the usual position is changed to other place, patroller can easily confirmthat the current position is different from the regular position.
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Figure 410-1 Attachment example to various switches
-Attachment example to equipment state and fault indicator
The red seal is pasted in regular lighting position |
of the indicator ainceadv.If the always |
switched-off indicator lights up, the patroller can |
understand that it is necessary to confirm |
immediately. |
|
Figure 410-2 Attachment example to equipment state and fault indicator
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