Works test of ultralong AC and DC cables Peter Mohaupt Mohaupt - - PowerPoint PPT Presentation

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Oct 27, 2022 376 likes •480 views

Grand Projects21 Works test of ultralong AC and DC cables Peter Mohaupt Mohaupt High Voltage GmbH Austria General Considerations Grand Projects21 Routine Testing of AC cables Upto 70km per phase AC test Routine Testing

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Works test of ultralong AC and DC cables

Peter Mohaupt Mohaupt High Voltage GmbH Austria

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General Considerations

Routine Testing of AC cables
Upto 70km per phase
AC test
Routine Testing of DC cables
DC test or AC test at reduced AC voltage
On-Site Testing of AC cables
Upto 70km per phase
AC test
On-Site Testing of DC cables
DC test or AC test at reduced AC voltage

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General Testing Solutions

Frequency Tuned Resonant Test Systems
Very Low Frequency Test Systems

Frequency of test voltage: (5) 10…300Hz Frequency of test voltage: 0,1Hz

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General Testing Solutions

Frequency Tuned Resonant Test Systems
Established and proven technology
Gets “bulky” at lower frequencies
Very Low Frequency Test Systems
Established in MV – no experience in HV and EHV
Complex technology
Better weight/performance ratio at frequencies <5Hz

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General Testing Solutions

100 1000 10000 10 20 CAPACITANCE (nF) FREQUENCY (Hz) 2180 545

4 times higher load can be tested at 10Hz compared to 20Hz

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VFRTS – Possible Solutions

Available at down to 10Hz
Test voltages upto 1000kV or above (if required)
Output power upto 100s of MVA @10Hz
Input power range of MW
Test capacitance in the range of 100µF

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VFRTS – Limitations

In this size/power not suitable for on site use
Power/cooling demands

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Outlook

Decrease of frequency – 5Hz?
VLF – 0,1?

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Thank you for your attention!