Preparation for commissiong is the first stage of the process. Technological nods and commission organisation, which includes commission range, principles of cooperation, required documentation and detailed work schedule are being defined during this step.
Formal takeover of technological nods by mechanical, electrical and AKPiA industries is executed after verification of correct installation by commissioning crew. Since after the crew takes full responsibility of the object and becomes temporary user with the possibillity of working 24 hours a day, 7 days a week.
Devices are being prepared for individual tests and first launch in no-load condition during “cold” functional tests. Every step of the process is documented according to the template. Fundamental commissioning activities are:
a) pre-commissioning acid cleaning,
b) verifying installation under completeness and correctness of assembly,
c) designation and virtual visualisation of test points,
d) checking turbines direction of rotation and test launch,
e) electric installation and devices overview,
f) functional tests of controlling, signalling, locks and switchgear protection,
g) idle launch with dynamic and thermal control,
h) first launch with voltage indication,
i) switchgear SZR test,
j) launch and commission of measuring circuits, armature (valves, latches) and drive control,
k) functional test of measuring circuits, limit value check,
l) individual tests of each device,
m) completeness of control signas check,
n) visualisation of technological process correctness check.
“Hot” commissionig means first launch and complex tests under load condition, that is with use of process media in order to check if devices are working correct with each other. Fundamental “hot” commissioning activities are:
a) complex safety tests,
b) launch of units and sets of devices,
c) sequence control, security and regulation check,
d) complex unit tests,
e) leading all day work of switchgear and common devices,
f) power backup tests under load condition,
g) commissioning of installation in full range of load,
h) establishing assumptions for possible changes in control, safety and tuning process,
i) executing full range of commission tests for individual and sequence control system under normal load condition,
j) executing group control system and safety tests,
k) automatic tuning systems launch,
l) executing assembly and supervision,
m) disposing detected defects,
n) measuring circuit, control and tuning supervision.
”Hot” commissiong, depending of installation or device, begins with:
During this stage we are checking every standard and auxiliary devices in full range of load, then tune them so constant work with guaranteed parameters can be granted. Tuning activities consists of:
a) device tuning and optimalization,
b) optimalization of automatic tuning systems under variable load,
c) variable load tests,
d) instructioning of the exploatation service.
Trial run is the last stage of commissioning, which confirms abillity of installation to work constantly, maintainig guaranteed parameters. Evaluation of the parameters is conducted both with indications from measuring systems and calculations from guarantee measurements. Fundamental trial run activities are:
a) maintaining constant work of installation,
b) supervision over devices and maintenance,
c) instructioning of the exploatation service.
Handing over for exploatation is unequivocal with commission termination. At this step final documentation is being made and object is handed over for target exploatation service.