Research on fast solid state DC breaker based on a natural current zero-crossing point
作者机构：State Key Laboratory of Advanced Electromagnetic Engineering and TechnologyHuazhong University of Science and TechnologyWuhan 430074China Alstom Grid China Technology Center(CTC)Minhang DistrictShanghai 201114China
出 版 物：《Journal of Modern Power Systems and Clean Energy》 (现代电力系统与清洁能源学报（英文）)
年 卷 期：2014年第2卷第1期
页 面：30-38页
核心收录：
学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学]
基 金：This work is supported by National Natural Science Foundation of China under the contract 51261130484 by State Grid Corporation of China under the contract State Grid Research 304(2013)
主 题：VSC-HVDC Multi-terminal HVDC DC short circuit fault DC breaker
摘 要：The DC fault characteristics of voltage source converter based high voltage direct current(VSC-HVDC)systems are analyzed in this *** phenomenon whereby the capacitor on DC side discharges quickly during a DC fault contributes to a large short-circuit fault *** traditional DC breakers nor DC switches can cut off the fault current under this condition.A fast solid state DC breaker design method is proposed in this *** method is based on the fault current characteristics of the inverter in multi-terminal HVDC systems(MTDC),where a fault current appears at the natural zerocrossing point near the *** this point,by coordinating the AC breakers near the rectifier,the DC breaker could reliably cut off the DC fault current and protect the system.A detailed model for this fast solid state DC breaker and its operation sequence are studied,based on this design *** modeling a five-terminal meshed DC grid and a fast DC breaker were carried out with PSCAD/EMTDC using this design *** results from the simulations confirmed the validity of the design method.
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