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第36届中国控制会议

作者： Mingxing Yu Jiazheng Zhu Xing Wang Department of information engineering Chaoyang Teachers College Huludao Power Supply Company State Grid Liaoning Electrical Power Co.Ltd. School of Mechanical Engineering Key Laboratory for Micro/Nano Technology and System of Liaoning ProvinceDalian University of Technology

ISBN: (纸本)9781538629185

A line-to-line short circuit fault of a stator is one of come faults in the real working process of single cage induction ***,studying the electromagnetic field and electromagnetic force after faults is of great *** this paper,the transient mathematical theory model of the line-to-line faults of squirrel cage induction motors was presented,and the two dimensional field circuit coupling electromagnetic force calculation model was proposed based on finite element method and stress tensor *** element software was used to analyze the rotor electromagnetic field distribution after short circuit faults of *** three dimensional dynamic diagram of magnetic flux density in the normal and tangential directions of motor rotor was evaluated by field *** analysis was performed for key moments within one period after a fault,in order to obtain the harmonic amplitude contents of each key moment and to find the main harmonic frequency and key moments affecting the electromagnetic *** results indicated that the rotor changes after faults under electromagnetic force of air gap and the electromagnetic forces in normal and tangential directions were respectively 1.2 and 1.8 times those of rated operation.

关键词： short circuit fault induction motor electromagnetic force harmonic analysis finite element

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A hybrid circuit breaker with fault current limiter circuit in a VSC-HVDC application

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Protection and Control of Modern Power Systems 2022年第1期7卷 657-669页

作者： Muhammad Ahmad Chunyang Gong Muhammad Haroon Nadeem Hui Chen Zhixin Wang School of Electronics Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Shanghai University of Electric Power Shanghai 200090People’s Republic of China EnergyVille/Electa Research Group Electrical Engineering Department ESATKU Leuven3001 HeverleeBelgium.

A conventional hybrid circuit breaker(HCB)is used to protect a voltage source converter-based high voltage direct current transmission system(VSC-HVDC)from a short circuit *** the increased converter capacity,the DC protection equipment also requires a regular *** paper adopts a novel type of HCB with a fault current limiter circuit(FCLC),and focuses on the responses of voltage and current during DC faults,which are associated with parameter ***/EMTDC based simulation of a three-terminal VSC-HVDC system confirms the effectiveness and value of HCB with FCLC,by using an equivalent circuit modelling *** experimental tests validate the simulation *** peak fault current is reduced according to the current limiting inductor(CLI)increase,and can be isolated more *** adopting parallel metal oxide arrester(MOA)with the main branch of HCB,voltage stresses across the breaker components decrease during transient and continuous operation,and less energy needs to be dissipated by the *** remnant current for all cases is transmitted to power dissipating resis-tor(PDR)in the final stage,and the fault current is reduced to the lowest possible *** the current from the main branch is transferred to the FCLC branch,transient voltage spikes occur,while smaller PDR is required to absorb current in the final stage.

关键词： VSC-HVDC HCB FCLC short circuit fault MOA

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