In this paper we investigate the behavior of the HVDC inverter following three phases AC fault to ground. The model is implemented in the Digital Real Time Simulator (DRTS) Hypersim developed by RT
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Hence, when the converter valve of the inverter is short-circuited or firing pulse is lost and various short-circuit faults occur in the AC system on the inverter side, commutation failure would result.
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This paper analyzes the influence of voltage amplitude reduction, zero-crossing displacement, and volt-age waveform distortion on the commutation process based on the phenomenon of commutation
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Commutation failures are very frequent dynamic events in high voltage dc (HVDC) transmission systems. Commutation failure is mostly observed at the inverter side of HVDC links, where large
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The negative-sequence voltage is often caused by the asymmetrical fault in the AC system, as well as the harmonics after the symmetrical fault at the AC side of
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Since the DC voltage is zero during a period following the commutation failure, no active power will be transmitted during this time. The system recovers in approximately 0.45s after...
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An in-depth analysis is made on the frequent commutation failure of ±800kV UHVDC power transmission project in the initial operation stage. The investigation shows that the
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The results of many existing research have shown that the main causes of commutation failure are the commutation bus voltage amplitude drop or phase deviation caused by external AC
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Through fault validation simulations conducted across three HVDC transmission systems, our strategy demonstrates effective suppression of commutation failure incidents within
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A novel method is developed to assess the commutation failure risk. In the multi-infeed HVDC system, the interaction between inverter stations is an important factor that triggers the
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