Estimation of Active Power Loss due to Supraharmonics in a 22 kV Transmission Line
DOI:
https://doi.org/10.25729/esr.2024.03.0002Keywords:
Power quality, supraharmonics, measurements, active power lossesAbstract
Power systems in Vietnam's coal mining industrial areas supply power of inferior quality. Supraharmonic voltages and currents in power grids serving electric energy to open-cut coal mines were detected by measuring power quality indicators and operating parameters in the power grid serving electric energy to the open-pit coal mine and coal screening plant operated by "Cua Ong-Vinacomin" company. The active powers of harmonics and supraharmonics do not produce any useful work. They induce extra loss of active power. Coal mining and coal processing companies pay for the loss, which results in diminished rate of return for them.
This paper offers a review of published research on the topic. It presents the results of measuring the operating parameters and power quality indicators for non-sinusoidal conditions at the point connecting a 22 kV power line to the power system that serves electric energy to an open-pit coal mine and coal screening plant. The active power loss caused by supraharmonics is calculated and analyzed.
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