Results 11 to 20 of about 210 (74)
IET Generation, Transmission & DistributionABSTRACT The appealing capability of long‐distance and large‐capacity power transmission makes High‐Voltage Direct Current (HVDC) transmission technology become an energy corridor of power systems. The controllable line‐commutated converter (CLCC) is an advanced direct current (DC) conversion device designed to address the commutation
Menghao Wen +5 more
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A novel low-voltage current-limiting control strategy with improved voltage compensation
Energy Reports, 2023 By optimizing the design of the conventional low-voltage current limiting controller (VDCOL), the continuous commutation failure on the receiving end of the traditional LCC-HVDC transmission system is effectively suppressed.
Haitao Wu, Yunbin Li, Zhihe Wang
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IET Generation, Transmission &Distribution, Volume 17, Issue 23, Page 5124-5134, December 2023., 2023 Decision tree (DT) model is adopted to extract the mapping relationship between transient overvoltage and massive electrical quantities of power grids. The common DT algorithm is transformed by modifying the error weight assignment, which reflects the error tolerances for different actual overvoltage regions. To compensate for potential inaccuracies in
Zhe Zhang +4 more
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IET Generation, Transmission &Distribution, Volume 17, Issue 16, Page 3638-3647, August 2023., 2023 This paper proposes an autonomous master‐slave control strategy suitable for the cascaded multi‐terminal UHVDC (CMT‐UHVDC) system to maintain voltage balance without real‐time communication between high‐end and low‐end valves. Several working conditions and the practical influence of sampling deviation on the control performance based on the ...
Sihang He +4 more
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IET Generation, Transmission &Distribution, Volume 17, Issue 8, Page 1902-1917, April 2023., 2023 An analytical expression among the dc current, ac voltage, and extinction angle of both layers is newly derived to find the dominant factors to the CCF. To improve the calculation accuracy, a three‐point sampling function using Newton interpolation is newly proposed to predict the dc current.
Shenghu Li, Yikai Li
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Analysis and prevention of commutation failure caused by HVDC rectifier AC faults
IET Generation, Transmission &Distribution, Volume 16, Issue 7, Page 1416-1424, April 2022., 2022 Abstract Earlier works have reported that rectifier AC faults also can cause commutation failure during fault‐off recovery process. Whereas the occurrence of CF is merely ascribed to inverter AC faults in conventional wisdom. Note that the existing CF mitigation approaches are designed mostly by the evolution of inverter electrical quantities, which ...
Sheng Lin, Yuqing Lei, Jian Liu, Lei Liu
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IET Renewable Power Generation, Volume 16, Issue 6, Page 1148-1158, 27 April 2022., 2022 Abstract The hybrid HVDC with cascaded multi‐infeed MMC inverters will be put into reality soon in China, but its MMC inverter in constant DC voltage control would become a rectifier when disturbance happens. Thus, to solve such problem and enhance the stabilities, the adaptive droop control is proposed for MMC inverters and a hierarchical coordinated ...
Jingbo Zhao, Yan Tao
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IET Generation, Transmission &Distribution, Volume 16, Issue 3, Page 591-602, February 2022., 2022 Abstract Concerning the transient power angle stability problem in AC/DC inter‐connected system caused by DC line grounding fault, a transient stability analysis method based on the stability margin of dynamic energy is proposed. First, the analytical expressions of the dynamic energy function before alpha retard, during alpha retard and after alpha ...
Jing Ma +3 more
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International Transactions on Electrical Energy Systems, Volume 2022, Issue 1, 2022., 2022 Commutation failure (CF) is an inherent drawback of line‐commutated converter high‐voltage DC (LCC‐HVDC) system. And CF prevention (CFPREV) control is widely applied in UHVDC lines to mitigate the subsequent CF. However, the formation of a multi‐infeed UHVDC system induces power exchange and voltage interaction between AC buses during the transient ...
Wei Yao +7 more
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Electronics Letters, Volume 57, Issue 5, Page 229-231, March 2021., 2021 Abstract The hybrid high‐voltage direct current (HVDC) with cascaded multi‐infeed MMC inverters is proposed in recent years, and it will be put into reality in near future. But the commutation failure of the line‐commutated converter (LCC) inverter will make the whole HVDC system to be blocked because the DC fault current could reach beyond the safety ...
Qin Jiang +3 more
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