Substation Test and Maintenance

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  3. Substation Test and Maintenance
Substation Test and Maintenance

Substation Test and Maintenance

Commissioning of Maintenance, Renovation, Test, and Substation

Guven Elektrik's experience in substation maintenance, pre-commissioning, and commissioning activities together with the necessary test equipment and completion of on-site testing.

We carry out the following works in a very professional way;

• Energy automation works

• Grounding and Lightning Rod Measurements

• Harmonic measurements

• Remote Measurement System

• Energy SCADA system

• All operation and maintenance

• Periodic maintenance of energy facilities

• Operation of energy facilities

• Emergency response troubleshooting

• Remote monitoring and control

• Photovoltaic module cleaning and maintenance checks

• High voltage power plant business responsibility

• Maintenance and repair of transformers


We offer the following jobs and services in a very professional manner. Continuous and trouble-free operation of electrical equipment, systems, and development;

Our main expertise;

POWER TRANSFORMERS

a) Power Transformer Maintenance and Tests

Tests we do during transformer maintenance;

• Power Factor Test %PF (DF, tan delta)

 

This test gives information about insulation defects in transformer winding and oil. AC is applied by applying high voltage.

• Transformer excitation current test (Magnetizing current measurement)

 This test provides information on core windings and winding deformation.

• Turn Rate Test

 This test provides information about the short circuit in the winding of the transformer, whether there is a jump or not.

• Winding Resistance MeasurementThis test provides information about transformer winding, tap changer switch contacts under load, looseness at connection points, etc. DC Insulation Resistance Test Provides information about insulation defects in transformer winding and oil. DC: applied by applying high voltage.

• Bushing Tests HV,

This test is performed by applying high voltage AV to the transformer bushing and detecting it. Insulation defects on boards.

• Load Tap Changer mechanical and electrical maintenance and tests

This test Transformer OLTC, contact conditions, insulating oil changes, and after that engine mechanical maintenance is done.

• Frequency Response Analysis (FRA) test Deformation of transformer windings and deterioration of windings are determined.

• Determine the vector group of the transformer by applying the primary voltage and controlling the balancing currents in the differential relay.

• Transformer oil and dissolved gas analysis

This test, the condition of the insulation and overheating and roasting in the coil Samples to be taken according to IEC-567 and ASTM D-923 standards, and waste oil should never be left in the power plant.

a) Electrical and Chemical Tests

• To determine the puncture voltage

• To determine humidity

• Specify the loss factor

• To determine the voltage of the inner surface

• Determine acidity


b) Dissolved gas analysis tests

• Methane (CH4)

• Hydrogen (H2)

• Carbon dioxide (CO2)

• Ethylene (C2H4)

• Ethan (C2H2)

• Acetylene (C2H2)

• Oxygen (O2)

• Nitrogen (N2)

• Carbon Monoxide (CO)

• Total Soluble Gas (ppm)

• Total Soluble Gas (%)

• Total Combustible Gas (ppm)

• Total Combustible Gas (%)

• Oil Change and Refinement Process

• Transformer mechanical protection equipment opening and signal control (Bucholz relay, winding thermometer, oil thermometer, pressure device, oil level relay, OLTC relay, etc.)


Our main expertise;

AIR INSULATION AND GIS SWITCH

a) Circuit breaker maintenance and testing

• Capacitance and wattage loss (%PF, DF)

 This test provides information on the insulators of the breakers and the isolation of SF6 gas. AC is applied by applying high voltage.

• DC Insulation Resistance Test

 This test provides information on the insulators of the breaker and the isolation of SF6 gas. DC is applied by applying high voltage.

• CB On-Off Time Measurement

This test enables the determination of the opening-closing coils of the breaker, the mechanical movements, and the open and closed movements of the contacts. The three stages are evaluated between each other and the manufacturer's limit values ​​are given. Informs about insulators and insulation of SF6 gas. DC is applied by applying high voltage.

• Contact Resistance Measurement Determination of contacts and corrosion formations is determined.

• SF6 Dew Point Measurement The dew point and moisture content of SF6 gas is determined.

• Gas leak test SF6 gas leak is detected.

a) Current and capacitive voltage transformer maintenance and testing (Instrument Transformer)

• Power Factor Test %PF (DF, tan delta)

This test gives information about insulation defects of Instrument Transformer coil and oil. AC is applied by applying high voltage.

• Turn Rate Test

 This test detects spool errors in Windings using label information

• Polarity check Determines whether the internal waveform is correctly polarized with respect to the waveform.

• Winding Resistance Measurement

This test provides information about the transformer's winding, slack in power. ports etc.

• DC Insulation Resistance Test

This test provides information on insulation defects in the winding and oil of the transformer. DC is applied by applying high voltage. It gives information about the subjects.

a) Surge Arrester