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Superconducting fault current limiter for multi-terminal HVDC grid protection 认领 引用 被引量：1
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作者 Wenxin Li Ying Xin 《Superconductivity》 EI CSCD 2025年第3期83-85,共3页
With the global energy transition,the proportion of renewable energy power generation in total electricity production has exceeded 30%and continues to rise,even the ratio is higher in China.Multi-terminal high-voltage... With the global energy transition,the proportion of renewable energy power generation in total electricity production has exceeded 30%and continues to rise,even the ratio is higher in China.Multi-terminal high-voltage direct-current(MT-HVDC)transmission systems have advantages of integration of distributed renewable energy sources,dynamic grid interconnections,and reliable islanding operation capabilities,being critical for next-generation power grid.Current limiting technologies are pivotal in maintaining grid safety and stability,especially for HVDC systems without natural zero-crossing point in fault currents.In this perspective,a superconducting fault current limiter(SFCL)with combination of resistance and inductance is necessary and more effective solution in protecting MT-HVDC transmission systems. 展开更多
关键词 renewable energy power generation limiting technologies global energy transitionthe maintaining gr superconducting fault current limiter reliable islanding operation capabilitiesbeing multi terminal high voltage direct current renewable energy
Reactive Power Multi-objective Optimization for Multi-terminal AC/DC Interconnected Power Systems Under Wind Power Fluctuation 认领 引用 被引量：8
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作者 Qian Hui Yun Teng +1 位作者 Hao Zuo Zhe Chen 《CSEE Journal of Power and Energy Systems》 SCIE EI CSCD 2020年第3期630-637,共8页
In view of the reactive power coordination difficulties caused by reactive power strong coupling,the provincial power grids in the interconnected system are formed by the multi-AC/DC transmission.Wind power channels a... In view of the reactive power coordination difficulties caused by reactive power strong coupling,the provincial power grids in the interconnected system are formed by the multi-AC/DC transmission.Wind power channels are under the conditions of large-scale long-distance transmission of wind power and other forms of renewable power generation.The AC-DC hybrid power flow equation of the interconnected system,including the AC-DC tie lines,is presented in this paper,along with the robust dynamic evolutionary optimization of the reactive power system in interconnected systems under fluctuating and uncertain wind power conditions.Therefore,the rapid collaborative optimization of reactive power flow and the exchange of reactive power between tie lines between provincial power grids are realized.The analysis was made by taking four interconnected large-scale provincial power grids of Eastern Mongolia,Jilin,Liaoning and Shandong as an example.The simulation results demonstrate the effectiveness and superiority of the proposed reactive power dynamic multi-objective optimization method for interconnected power grids. 展开更多
关键词 Multi-objective robust evolution multi terminal AC/DC interconnection reactive power optimization wind power transmission
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MMC-MTDC Transmission System with Partially Hybrid Branches 认领 引用 被引量：10
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作者 Yongyang Chen Shangzhi Pan +3 位作者 Meng Huang Zili Zhu Yushuang Liu Xiaoming Zha 《CES Transactions on Electrical Machines and Systems》 CSCD 2021年第2期124-132,共9页
This paper proposes a hybrid submodule modular multilevel converter(MMC)topology which is suitable for multi terminal direct current(MTDC)transmission systems.Each arm of the proposed MMC topology consists of a half-b... This paper proposes a hybrid submodule modular multilevel converter(MMC)topology which is suitable for multi terminal direct current(MTDC)transmission systems.Each arm of the proposed MMC topology consists of a half-bridge submodule(HBSM)branch and two parallel full-bridge submodule(FBSM)branches.Comparing with the conventional MTDC transmission system,the proposed topology can selectively block the DC fault current and isolate the corresponding fault line without expensive DC circuit breakers(DCCBs).Thus,the influence range of the DC fault can be reduced and the reliability of the power supply can be improved as well.The corresponding modulation and voltage balancing strategies are developed for the proposed hybrid MMC topology.The feasibility of the proposed topology and control strategy is verified in the MATLAB/Simulink simulation. 展开更多
关键词 Hybrid modular multilevel converter multi terminal networks high voltage dc(HVDC)transmission
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