双三相永磁同步风力发电机共模等效电路

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DOI：10.15938/j.emc.2025.05.008

中图分类号：TM315 文献标志码：A 文章编号：1007-449X（2025）05-0076-09

Double three-phase permanent magnet synchronous wind generator common-mode equivalent circuit

LI Jie 1，2 ，TING Heisi1，²， ZHENG Xiaochun³，LIANG Shuo3

（1.SchoolofElectrical Engineering，Hebei UniversityofTechnology，Tianjin300l30，China；2.StateKeyLaboratoryof

Smart PowerDistributionand Utilization Equipment Systems，Hebei Universityof Technology，Tianjin 30013O，China; 3.School of Artificial Intelligence，Hebei University of Technology，Tianjin 3004O1，China）

Abstract：The common-mode equivalent circuit of internal parasitic capacitance in double three-phase permanent magnet synchronous wind generator（DT-PMSWG） is crucial for evaluating bearing voltage and bearing current. A common-mode equivalent circuit model was proposed for DT-PMSWGs with isolated neutral points in the dual three-phase winding topology. Firstly，a1O MW DT-PMSWG was analyzed to investigate distribution of parasitic capacitances within the generator. Geometric analytical expressions were derived，and the capacitance values were calculated and verified by using the finite element method.Secondly，considering the isolation effects of separated neutral point on the parasitic capacitance paths in DT-PMSWG windings，the common-mode equivalent circuit for DT-PMSWG was built. Based on the proposed model，analytical expressions of the bearing voltage ratio （BVR），which represents the voltage division ratio of the stator-side common-mode voltage （CMV） across the bearings，and the bearing voltage were derived. Finally，a simulation model of the DT-PMSWG system incorporating the proposed common-mode equivalent circuit was constructed，and its efectiveness and accuracy were validated through comparative analysis. The results provide a theoretical basis for further research on bearing voltage and bearing current in DT-PMSWGs.

Keywords： double three-phase permanent magnet synchronous wind generator； parasitic capacitance;common-mode equivalent circuit；common-mode voltage； shaft voltage

0引言

近年来，海上风机呈现大型化发展趋势，双三相永磁同步风力发电机（doublethree-phasepermanentmagnetsynchronouswind generator，DT-PMSWG）因高功率等级、高转矩密度、良好的容错性能，成为极具发展潜力的海上风力发电技术[1-3]。（剩余12607字）