Electric integrated startup

Electric integrated startup test is a complete inspection and test before putting into service of primary and secondary system of electric system. The purpose of thid procedure is that guarantee the startup test are well organized, well planed, orderly and smooth with safety measures and that make preparations in advance to make sure the electric integrated startup work will go smoothly.

Check List for Commissioning Preparation
Mechanical team:

1. Subsystem commissioning of turbine & boiler has been finished and integrated startup can be done
2. Relevant protection for turbine and boiler has been put into service
3. All interlock protection of boiler and turbine has been put into service
4. Turbine bypass system can be put into service reliably
5. Generator tightness test is qualified. Hydrogen injection of generator proper has been finished. Hydrogen cooler and dryer have been put into service
6. Generator stator cooling water is qualified and system operation is normal
7. DCS indication of generator and turbine temperature measuring point is correct.

Electrical team:

1. Installation of primary and secondary equipment related to generator & transformer and 150kV power distribution device has been finished, which complies with the requirements of regulations and specifications and passes the acceptance inspection.
2.  Test of primary and secondary equipments related to generator, transformer, HV auxiliary transformer and excitation transformer has been finished and passed the acceptance inspection.
   Static commissioning of generator, transformer, protection system, excitation system, synchronization system and station service power transfer device has been finished. Setting work has been finished according to the setting list.
3.  Test of primary and secondary equipments related to generator, transformer, HV auxiliary transformer and excitation transformer has been finished and passed the acceptance inspection.
   Static commissioning of generator, transformer, protection system, excitation system, synchronization system and station service power transfer device has been finished. Setting work has been finished according to the setting list.
4.  Commissioning of all electric cabinet secondary circuit has been finished. Interlock protection and static transmission test have been finished, which meets the design requirements.
   Static energization test of CB 5A4 & 5AB4 and generator CT secondary AC circuit have been finished.
5.  Confirm that PT circuit is without short-circuit, CT circuit is without open circuit, wiring is correct and polarity is correct.
6.  150kV power distribution has been put into service normally, and NCS, DCS, remote control and remote measuring system work normally. 
7.  Item, Name, number and identification sign for all electric equipment are clear. Windows and doors of the power distribution room are in good condition. Lighting is sufficient. Trench cover is complete. Safety access is smooth. Communication and fire protection facilities are good and available. Safety warning sign in clear and doors can be locked.
8. Tap of main transformer and HV auxiliary transformer has been put into corresponding position according to the requirements of PLN and DC resistance of the setting position has been measured.
9. Grounding of main transformer and HV auxiliary transformer proper is good.
10.  Drying agent and oil level of oil conservator of main transformer and HIV auxiliary transformer is normal. Porcelain busing is without oil leakage.

Air of bucholz relay of main transformer and HV auxiliary transformer proper has been discharged.
Air cooling system and emergency oil discharge system of main transformer and HV auxiliary transformer can be used.
Commissioning of emergency section diesel generator set has been finished, interlock protection test is correct, auto startup function is reliable. Diesel generator set is in hot standby status during integrated startup.
Measure the insulation resistance of generator & transformer primary system, which should meet the requirements.
Measure the insulation resistance of excitation system, which should meet the requirements.
Interlock test of boiler, turbine and generator has been finished, which is correct and reliable.
All DC system and UPS system work reliably.
Generator enclosed bus micro positive pressure system has been put into service and works normally
No people work in the energized equipment area during integrated startup test and no work permit issued.
Main enclosed bus of excitation transformer and generator has been disconnected and isolating measures has been prepared.
6kV temporary excitation power supply connected from CB 6219B cabinet can be used, protection has been set based on the 140A current
Relevant manufacturer’s documents, technical data, protection setting list, test record and drawings from design institute are prepared.
Confirm CB 5A4 and 5AB4 are opened, control power is switched off and warning signs for forbidding closing operation while someone is working of relevant equipment has been hung up
Confirm CB 5A41, 5A42, 5AB41 and 5AB42 are opened, control power is switched off and warning signs for forbidding closing operation while someone is working of relevant equipment has been hung up
Item
Confirm ES 5A41E, 5A42E, 5AB41E and 5AB42E are opened, control power is switched off and warning signs for forbidding closing operation while someone is working of relevant equipment has been hung up
Bus of 150Kv bus I is dead
Confirm ES A1E and A2E of bus I are opened, warning signs for forbidding closing operation while someone is working of relevant equipment has been hung up
Confirm CB 602A and 602B are opened and in test position, control power is switched off and warning signs forbidding closing operation while someone is working of relevant equipment has been hung up.
Confirm #2 generator outgoing line PT in isolating position.
Confirm 602A PT and 602B PT are in isolating position.
6Kv short circuit trolley switch can be used.
Confirm knife switch of excitation rectifier cabinet AC side and DC side in opened position and field extinguishing breaker is in opened position.
Confirm rectification/inversion switch of field regulator cabinet is in inversion position, remote/local control switch in local control position, retreat field flashing power supply switch QF65.
Short circuit wire required in the attached drawing ( generator and transformer system drawing) has been prepared.
Short circuit current of each short circuit point as following:
K1: 13000A
K2: 1000A (Use ES 5A41E to replace it)
K3: 1000A (Use ES 5AB42E to replace it)
K4 & K5: 2000A
Wiring of rotor AC impedance test has been finished
Wiring of closing main stop valve for generator and transformer set protection, turbine over speed for ETS cabinet, synchronization auto load increasing for DEH cabinet and excitation cabinet synchronization signal has been temporarily removed.
Confirm generator neutral point ES G is in closing position.
Put into service of main transformer, HV auxiliary transformer, cooling system and excitation transformer temperature control device before integrated startup test and check  that they work normally.
Current circuit from CB 5A4 CT to bus protection in 150Kv bus I bus protection cabinet has been temporarily adjusted and voltage setting value is 115V.
Check that G & T protection device works normally
Item
Confirm generator water failure has been put into service and stator over voltage protection has been temporarily adjusted and voltage setting value is 115V.
Confirm non-electric protection of main transformer and HV auxiliary transformer has been put into service, outlet of which acts on generator excitation trip. Other protection all retreated.
6Kv primary phase check and protection equipment are available.
Unit integrated startup commissioning procedure has been approved and issued by startup commissioning chief commander and operation team has made the operation permit according to the procedure.