Results 1 to 10 of about 210 (74)
IET Energy Systems IntegrationThe inverter side of hybrid cascaded HVDC adopts the structure of Modular Multilevel Converter (MMC) in series with Line Commutated Converter (LCC). The complete system amalgamates the advantages of LCC with MMC, but it also makes the interaction process
He Wang +4 more
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Energies, 2023 Subsequent commutation failure in high-voltage DC transmission systems seriously emphasizes the safe and stable operation of power systems. Via analyzing the mechanism of commutation failure and the principle of voltage-dependent current order limiter ...
Kunlun Han, Chen Hailin, Shuhao Liu
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Rapid Recovery Control Method Based on Improved VDCOLs for Hybrid Multi-Infeed DC Transmission System After AC Failure [PDF]
Frontiers in Energy Research, 2021 Continuous commutation failure is very likely to occur in the hybrid Multi-infeed high-voltage direct current (HMIDC) after AC failure. In order to improve the recovery quality after HMIDC failure, an AC-DC voltage-dependent current order limiter (VDCOL)
Chizu Mao +5 more
doaj +11 more sources
Journal of Physics: Conference Series, 2023 Abstract This research based on different startup and operation modes of Heilongjiang receiving power grid, The influence of anti disturbance capability of converter bus on DC recovery characteristics. A VDCOL parameter optimization configuration scheme based on multi feed short circuit ratio (MSCR) is proposed. Through the DC near fault
Nan Cai +5 more
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Transient overvoltage control strategy based on improved VDCOL curve for AC-DC system
Journal of Physics: Conference SeriesAbstract In order to suppress the transient overvoltage at the bus bar of the transmission terminal of the AC-DC system, a transient overvoltage suppression strategy based on an improved VDCOL curve is proposed. Firstly, the expression of transient overvoltage is derived based on the DC short-circuit ratio, and then an evaluation index ...
Jiaqi Wang, Yinghui Li, Yupeng Wang
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SustainabilityIn recent years, with the continuous growth in China’s economy, the continuous advancement of urbanization and industrialization, the contradiction between rapid economic development and the continuous reduction in traditional fossil energy reserves such as coal, oil, and natural gas, the continuous aggravation of environmental pollution has become ...
Liu, Hewei, Jin, Guobin
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New VDCOL Control Strategy for Voltage Stability in Receiving-End Power Grid of DC System
Advanced Materials Research, 2012 Voltage stability of AC/DC hybrid power grid is closely related to Voltage Dependent Current Order Limiter (VDCOL). The effects of VDCOL to voltage stability along with serious voltage reduction during or after faults are analyzed in detail. Considering that VDCOL with fixed parameters is difficult to adapt the complexity of operation conditions and ac
Liu Xiao Ming, Xiao Ming Liu
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Suppression strategy for subsequent commutation failure of DC system based on improved VDCOL
电力工程技术, 2022 Aiming at the problem of subsequent commutation failure during the fault recovery period after the first commutation failure of high voltage direct current system,the recovery process is divided into the first commutation failure (stage 1),the beginning ...
CHEN Ruikang +3 more
doaj +2 more sources
Adaptive VDCOL control strategy for the recovery of the UHVDC SPC system
The Journal of Engineering, 2019 The separating pole connection (SPC) mode of ultra-high-voltage direct current (UHVDC) can significantly improve the power stability, but when the AC bus of one pole is failed and two receiving systems are near, it may cause subsequent commutation ...
Shujun Yao +3 more
doaj +2 more sources
DEStech Transactions on Engineering and Technology Research, 2020 Based on the incremental power flow equation, the influence of VDCOL controller parameters on voltage stability factor VSF was studied by sensitivity analysis method, and the mathematical relationship between the two was obtained for the first time. Based on the analytical relationship, the quantitative relationship between VDCOL control parameters and
JUN XIAO +5 more
openaire +3 more sources