The Online Stator Winding Insulation Monitoring for PMSG-PWM rectifier System under Various Working Conditions

The permanent magnet synchronous generator (PMSG) connected to pulse width modulation (PWM) rectifier is widely used in the renewable energy applications, such as direct–drive wind turbines and marine current turbines. The reliability of the PMSG is crucial due to the high maintenance cost of the turbines. The stator winding insulation is one of the main reasons for the PMSG failures. However, the current technologies can only detect the insulation failure when the short-circuit failure has already happened, which cannot avoid the corresponding downtime losses. Therefore, the online monitoring method for stator winding insulation is performed on the PMSG-PWM rectifier system in this paper for the first time. The factors affecting the voltage harmonics on the stator winding insulation are studied and their effects on the monitoring results are analyzed. Based on the flow path of the insulation leakage current and the phase-to-ground voltage, the insulation impedance can be measured online. The effects of the rotor position and the working condition are also analyzed. The effectiveness of the online condition monitoring method for PMSG-PWM rectifier system under various working conditions is verified using offline and online tests.

[1]  Pinjia Zhang,et al.  Common-Mode (CM) Current Sensor Node Design for Distribution Grid Insulation Monitoring Framework Based on Multi-Objective Optimization , 2021, IEEE Transactions on Industrial Informatics.

[2]  Pinjia Zhang,et al.  An Online Groundwall and Phase-to-Phase Stator Insulation Monitoring Method for Inverter-Fed Machine , 2021, IEEE Transactions on Industrial Electronics.

[3]  Pinjia Zhang,et al.  A Novel Method of Monitoring and Locating Stator Winding Insulation Ageing for Inverter-fed Machine based on Switching Harmonics , 2020, 2020 IEEE Energy Conversion Congress and Exposition (ECCE).

[4]  Pinjia Zhang,et al.  Analytical Analysis and Design of an Advanced Differential-Mode Current Sensor for Insulation Monitoring for Industrial Electrical Assets , 2020, IEEE Access.

[5]  Antonio Griffo,et al.  Online Condition Monitoring for Diagnosis and Prognosis of Insulation Degradation of Inverter-Fed Machines , 2019, IEEE Transactions on Industrial Electronics.

[6]  J. C. Le Claire,et al.  An improved torque control strategy of “five-phase PMSG-PWM rectifier” set for marine current turbine applications , 2019, 2019 IEEE 13th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG).

[7]  Liyue Zhang,et al.  Rectifer System Design Research of Wind Turbines Grid , 2017, 2017 Second International Conference on Mechanical, Control and Computer Engineering (ICMCCE).

[8]  Sam Salem,et al.  Electrical signature analysis based condition monitoring and diagnostics techniques for wind turbines , 2017, 2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED).

[9]  Hans Ertl,et al.  Impact of SiC semiconductors switching transition speed on insulation health state monitoring of traction machines , 2016 .

[10]  Wu Guangning,et al.  Feasibility research of aging status assessment of steam turbine generator insulation by frequency-domain dielectric spectroscopy , 2016, 2016 IEEE Electrical Insulation Conference (EIC).

[11]  Pinjia Zhang,et al.  Non-invasive condition monitoring and diagnostics techniques for wind turbines , 2016, 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia).

[12]  Tianhao Tang,et al.  Power Control of a Nonpitchable PMSG-Based Marine Current Turbine at Overrated Current Speed With Flux-Weakening Strategy , 2015, IEEE Journal of Oceanic Engineering.

[13]  Wei Qiao,et al.  A Survey on Wind Turbine Condition Monitoring and Fault Diagnosis—Part I: Components and Subsystems , 2015, IEEE Transactions on Industrial Electronics.

[14]  M. Sasikumar,et al.  Comparison of SVPWM and SVM controlled smart VSI fed PMSG for wind power generation system , 2014, 2014 IEEE National Conference on Emerging Trends In New & Renewable Energy Sources And Energy Management (NCET NRES EM).

[15]  G. C. Stone,et al.  Condition monitoring and diagnostics of motor and stator windings – A review , 2013, IEEE Transactions on Dielectrics and Electrical Insulation.

[16]  Pinjia Zhang,et al.  A novel online stator ground-wall insulation monitoring scheme for inverter-fed AC motors , 2013, 2013 IEEE Energy Conversion Congress and Exposition.

[17]  Thomas G. Habetler,et al.  A survey of condition monitoring and protection methods for medium voltage induction motors , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[18]  D. Magnon,et al.  Graphical analysis of the spectra of EMI sources in power electronics , 2005, IEEE Transactions on Power Electronics.

[19]  Thomas A. Lipo,et al.  Pulse Width Modulation for Power Converters: Principles and Practice , 2003 .