基于压电执行机构的快速直流开断技术研究 米

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1， ²， 1，2（1.，；2. ， ）

刘宇（1997—），男，硕士研究生，研究方向为智能电器理论与工程。

关键词：压电执行机构；快速机械开关；混合式直流断路器；直流开断中图分类号：TM561.1 文献标志码：A 文章编号：2095-8188（2025）06-0001-06DOI： 10.16628/j .cnki.2095-8188.2025.06.001

Research on Fast DC Interruption Technology Based on Piezoelectric Actuator

LIU Yu1 ， Mohmmad AL-DWEIKAT²， ZHANG Guogang 1，2 （1.School of Future Technology，Xi’an Jiaotong University，Xi'an 71OO49，China; 2. State Key Laboratory of Electrical Insulation and Power Equipment， Xi’an JiaotongUniversity，Xi’an 71OO49，China）

Abstract：With the increasingly widespread application of DC power systems，the problems caused by shortcircuit faults have become more prominent.The DC short-circuit fault currentrises rapidlyand lacks anatural zerocrossing point.The transientlarge current generatedbyshort-circuit fault poses great harm to power equipment and putsforward higher requirements for the breaking speed ofDCswitches.Aimingatthis problem，a structure of fast mechanical switchbased onpiezoelectric actuator（PA-FMS）is proposed.Byadopting a hybrid switch scheme，the fastDC interruption isachieved.In viewof theworking characteristicsofthe piezoelectricactuator，theconstantcurent drivecircuit is designed.Through theoptimization of circuit parameters，the overshot and rebounce of the moving contact are reduced.A hybrid DC circuit breaker experimental system is constructed.The test results show thatthe fault current transfer time of hybridDCcircuitbreaker isabout 200μs ，andthe full breaking time is less than 800μs

Key words：piezoelectric actuator; fast mechanical switch；hybrid DC circuit breaker;DC interruption

0 引言

应用日益广泛，尤其是在船舶中压直流综合电力系统、直流数据中心及直流轨道交通等配电领域，直流短路故障电流的快速上升特性及其缺乏自然近年来，直流电力系统在中压和高压领域的过零点的特点，使得其对电力设备的危害更为严重[14]。（剩余6587字）