Full-scale starting-up and adjusting procedures for a new generator commissioning

Adjusting procedures on an idle generator with a rotor rolled out from a stator:

• use a TV endoscope to evaluate the stator winding condition in the generator;

• use a TV endoscope to evaluate the rotor winding condition in the generator;

• carry out an ultrasonic inspection of the active steel in the stator;

• check a condition of the structural component;

• measure the parameters (R60/R15) of the stator winding insulation in the generator, and determine the required test voltage magnitudes (50 Hz test voltage and rectified test voltage);

• use a rectified test voltage to test the stator winding insulation and to determine the nonlinearity factor of an insulation leakage current;

• use an increased test voltage (50 Hz) to test the stator winding insulation;

• measure the parameters of the rotor winding insulation;

• measure the rotor AC resistance;

• measure the stator winding DC resistance;

• carry out a chromatographic analysis of hydrogen from the generator case;

• to provide fair automated inspection of the condition of cores in high-power electric machines, before and after repair, several times scan a stator bore after outage for repair (with a rotor rolled out) and after completion of a repair, to check its quality.

Adjusting procedures on an idle generator with a rotor placed into a stator and with closed end shields on a generator:

• apply an increased AC voltage to measure the insulation resistance and to carry out a check test of the stator winding insulation;

• measure the parameters of the rotor winding insulation;

• measure the rotor AC resistance.

Adjusting procedures the rotating electric machine:

• determine the short-circuit characteristics;

• determine the no-load characteristics;

• test the generator turn insulation;

• measure the residual voltage on the generator lead-outs.

In accordance with the tests results, the generator condition report is issued.

Starting-up and adjusting procedures for the generator exciting systems commissioning:

Starting-up and adjusting procedures on a high-voltage side:

• primary equipment (switch etc.);

• control circuits, relay protection circuits and automatic equipment for the generator alarm systems;

• generator synchronization systems.

Starting-up and adjusting procedures on a low-voltage side:

• control, protection and automatic operation circuits for motors (operating the circulation pumps, oil pumps etc.);

• power assemblies equipment (PR-85, RTZO-88);

• balance-of-plant switchgear (RUSN) 0.4 kV.

Starting-up and adjusting procedures for the power transformers commissioning: full range of works stipulated by the “Electric Equipment Tests Procedures and Schedules” Regulation.

Preparation of instructions: operation instructions for newly commissioned equipment, including the generator, exciting system, transformers, brush contact equipment (if applicable), motors, relay protection circuits and automatic equipment for standby lead-ins, generator protection microprocessor-controlled terminals, generator rotor ground fault protection kits, manual and automatic synchronization devices, power equipment switchgear (KRU) 6-10 kV, balance-of-plant switchgear (RUSN) 0.4 kV, distribution devices (RU) 110 kV, electromagnetic polarized relays; instructions for elimination of faults of electric equipment; fire safety instructions.