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RISS 인기검색어
- 검색키워드
- 저자 : Mingyao Lin (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Luo, Hao,Lin, Mingyao,Cao, Yang,Guo, Wei,Hao, Li,Wang, Peng The Korean Institute of Power Electronics 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.5
The ride-through control of a doubly-fed induction generator (DFIG) for the voltage sags on wind farms utilizing crowbar circuits by which the rotor side converter (RSC) is disabled has being reported in many literatures. An analysis and calculation of the transient current when the RSC is switched off are of significance for carrying out the low voltage ride through (LVRT) of a DFIG. The mathematical derivation is highlighted in this paper. The zero-state and zero-input responses of the transient current in the frequency domain through a Laplace transformation are investigated, and the transient components in the time domain are achieved. With the characteristics worked out from the linear resolving without modeling simplification, the selection of the resistance in the linear crowbar circuit and the value conversion from a linear circuit to a nonlinear one is proposed to setup the attenuation rate. In terms of grid code requirements, the theoretical analysis for the time constant of the transient components attenuation insures the controllability when the excitation of the RSC is resumed and it guarantees the reserved time for the response of the reactive power compensation. Simulations are executed in MATLAB/SIMPOWER and experiments are carried out to validate the theoretical analysis. They indicate that the calculation method is effective for selection of the resistance in a crowbar circuit for LVRT operations.
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Hao Luo,Mingyao Lin,Yang Cao,Wei Guo,Li Hao,Peng Wang 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.5
The ride-through control of a doubly-fed induction generator (DFIG) for the voltage sags on wind farms utilizing crowbar circuits by which the rotor side converter (RSC) is disabled has being reported in many literatures. An analysis and calculation of the transient current when the RSC is switched off are of significance for carrying out the low voltage ride through (LVRT) of a DFIG. The mathematical derivation is highlighted in this paper. The zero-state and zero-input responses of the transient current in the frequency domain through a Laplace transformation are investigated, and the transient components in the time domain are achieved. With the characteristics worked out from the linear resolving without modeling simplification, the selection of the resistance in the linear crowbar circuit and the value conversion from a linear circuit to a nonlinear one is proposed to setup the attenuation rate. In terms of grid code requirements, the theoretical analysis for the time constant of the transient components attenuation insures the controllability when the excitation of the RSC is resumed and it guarantees the reserved time for the response of the reactive power compensation. Simulations are executed in MATLAB/SIMPOWER and experiments are carried out to validate the theoretical analysis. They indicate that the calculation method is effective for selection of the resistance in a crowbar circuit for LVRT operations.
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Yang, Gongde,Fu, Xinghe,Lin, Mingyao,Li, Nian,Li, Hao The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.1
This research comparatively studies three kinds of flux regulation methods, namely, stored capacitor discharge pulse (SCDP), constant current source pulse (CCSP), and quantitative flux regulation pulse (QFRP), which are used for hybrid permanent magnet (PM) axial field flux-switching memory machines (HPM-AFFSMMs). Through an analysis of the operation principle and the series hybrid PM flux regulation mechanism of the objective machine, the circuit topologies and flux regulation process of these flux regulation methods are addressed in detail. On the basis of a simulation, the flux regulation characteristics of the researched machine during the magnetization and demagnetization processes are comparatively evaluated. Then, machine performance, including back EMF, direct and quadrature axis inductances, and magnetization and demagnetization characteristics, is quantitatively investigated. Results show that the QFRP enables the HPM-AFFSMM to achieve a less harmonic component of back EMF by approximately 7.28% and 7.97% at the magnetization and demagnetization states, respectively, and a more complete magnetization process than the SCDP and CCSP.
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Gong-De Yang,Xinghe Fu,Mingyao Lin,Nian Li,Hao Liu 전력전자학회 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.1
This research comparatively studies three kinds of flux regulation methods, namely, stored capacitor discharge pulse (SCDP),constant current source pulse (CCSP), and quantitative flux regulation pulse (QFRP), which are used for hybrid permanentmagnet (PM) axial field flux-switching memory machines (HPM-AFFSMMs). Through an analysis of the operation principleand the series hybrid PM flux regulation mechanism of the objective machine, the circuit topologies and flux regulation processof these flux regulation methods are addressed in detail. On the basis of a simulation, the flux regulation characteristics of theresearched machine during the magnetization and demagnetization processes are comparatively evaluated. Then, machineperformance, including back EMF, direct and quadrature axis inductances, and magnetization and demagnetizationcharacteristics, is quantitatively investigated. Results show that the QFRP enables the HPM-AFFSMM to achieve a lessharmonic component of back EMF by approximately 7.28% and 7.97% at the magnetization and demagnetization states,respectively, and a more complete magnetization process than the SCDP and CCSP.
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