Results 11 to 20 of about 3,066,783 (329)
Commutation Failure Mitigation Method Based on Imaginary Commutation Process
Journal of Modern Power Systems and Clean Energy, 2022 The commutation failure (CF) mitigation effectiveness is normally restricted by the delay of extinction angle (EA) measurement or the errors of existing prediction methods for EA or firing angle (FA). For this purpose, this paper proposes a CF mitigation
Renlong Zhu +6 more
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Commutation Failure Prediction Method Considering Commutation Voltage Distortion and DC Current Variation [PDF]
IEEE Access, 2019 Commutation failure (CF) at the inverter side is one of the most common failures in the line-commutated converter-based high voltage direct current (LCC-HVDC) system. Effective prediction of CF helps to formulate and implement protection measures timely.
Qi Wang +3 more
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Procedure analysis of UHVDC commutation failure
The Journal of Engineering, 2019 There may be a commutation failure during a fault or start-up of the UHVDC inverter side. The law of commutation failure process in UHVDC converter is studied here. First, the cause of inverter commutation failures is briefly introduced.
Chenqing Wang +4 more
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Modeling of Efficient Control Strategies for LCC-HVDC Systems: A Case Study of Matiari–Lahore HVDC Power Transmission Line [PDF]
Sensors, 2022 With the recent development in power electronic devices, HVDC (High Voltage Direct Current) systems have been recognized as the most prominent solution to transmit electric power economically. Today, several HVDC projects have been implemented physically.
Adeel Ahmed +8 more
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Studies of commutation failures in hybrid LCC/MMC HVDC systems [PDF]
Global Energy Interconnection, 2020 A hybrid of line commutated converters (LCCs) and modular multi-level converters (MMCs) can provide the advantages of both the technologies. However, the commutation failure still exists if the LCC operates as an inverter in a hybrid LCC/MMC system.
Gen Li +6 more
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An Improved Commutation Prediction Algorithm to Mitigate Commutation Failure in High Voltage Direct Current [PDF]
Energies, 2017 Commutation failure is a common fault for line-commutated converters in the inverter. To reduce the possibility of commutation failure, many prediction algorithms based on alternating current (AC) voltage detection have already been implemented in high ...
Xinnian Li +6 more
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IEEE AccessThe HVDC transmission system with a line-commutated converter is prone to commutation failure when connected to a weak AC grid and has disadvantages such as a large footprint of AC filters and high noise from the converter transformer.
Hao Zhang +5 more
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Shanghai Jiaotong Daxue xuebao, 2022 In order to suppress subsequent commutation failures of high voltage direct current (HVDC), the dynamic process of electrical and control quantities during system recovery is studied, and the main reason for subsequent commutation failures is proposed in
CONG Xinpeng, ZHENG Xiaodong, CAO Yaqian, TAI Nengling, MIAO Yuancheng, LI Ke
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Characteristics of commutation failure based on fault recording
The Journal of Engineering, 2018 Commutation failure of the high-voltage direct current (HVDC) transmission system is common fault in a converter station. The fault recording in one converter station when commutation failure caused by the disturbance of the AC system was collected, and ...
Han Zheng +6 more
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High VoltageCommutation failure (CF) is an inherent problem faced by line commutated converter high voltage direct current (LCC‐HVDC) technology. To completely solve the problem of CF, we have proposed a novel hybrid commutated converter (HCC) technology based on ...
Zongze Wang +7 more
semanticscholar +3 more sources