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Autor:
Wei Liu, Xiangjun Zeng, Zhining Lv, Guoxuan Zhao, Zihang Hu, Zijun Zhao, Deng Wei, Luo Weifeng, Baifeng Ning, Kun Yu
Publikováno v:
2019 IEEE 8th International Conference on Advanced Power System Automation and Protection (APAP).
This paper presents a protection scheme based on cluster analysis for wind farm collector line. Since the short circuit current is related to the voltage sags, after the rotor Crowbar protection is put into operation during the short circuit fault of
Publikováno v:
2018 71st Annual Conference for Protective Relay Engineers (CPRE).
Electrical power systems control arcing current and electrical shock hazard by proper neutral grounding such as high resistance grounding. The high resistance neutral grounding resistors fail due to vibration, intermittent arcs, corrosion, etc. and c
Publikováno v:
2017 IEEE Energy Conversion Congress and Exposition (ECCE).
This paper proposes an enhanced approach to estimate the stator winding temperature based on active DC flux injection for induction machines with two representative direct torque control (DTC) schemes, the conventional hysteresis-based DTC and the de
Publikováno v:
2017 IEEE Energy Conversion Congress and Exposition (ECCE).
In this paper, a method is proposed for detection and estimation of high-resistance connection (HRC) for permanent magnet synchronous machine (PMSM) derives. The method is based on the relationship between the zero sequence voltage components (ZSVC),
Publikováno v:
2017 IEEE Energy Conversion Congress and Exposition (ECCE).
Reliability of a recently developed adaptive stator windings to ground fault protection scheme based on third-harmonic voltages is compared to an existing non-adaptive scheme. Sensitivity and security analyses are performed to conclude that the propo
Autor:
Italo A. Cavalcanti de Oliveira, Edison Roberto Cabral da Silva, Ely Cavalcanti de Menezes, Cursino B. Jacobina, Nady Rocha, Luanna M. Silva de Siqueira
Publikováno v:
2017 IEEE Energy Conversion Congress and Exposition (ECCE).
In this paper a Wind Energy Conversion System based on Doubly Fed Induction Generator (DFIG) with an additional Series Grid Side Converter (SGSC) without transformer is proposed. Unbalanced stator voltages may be compensated by SGSC, thus eliminating
Publikováno v:
2017 IEEE Energy Conversion Congress and Exposition (ECCE).
In the frame of the green economy, anisotropic synchronous motors are gaining considerable shares of market. There are already several interesting proposals about the accurate magnetic modelling of their complex magnetic structure, that generally req
Autor:
Bahareh Anvari, Hamid A. Toliyat
Publikováno v:
2017 IEEE Energy Conversion Congress and Exposition (ECCE).
Interests in using rare-earth free motors such as switched reluctance motors (SRMs) for electric and hybrid electric vehicles (EV/HEVs) continue to gain popularity, owing to their low cost and robustness. Optimal design of a SRM, to meet specific cha
Publikováno v:
2017 IEEE Energy Conversion Congress and Exposition (ECCE).
This paper aims to investigate through simulations and experimental results the effects of frequency on the iron losses in laminations adopted for electrical machines. To this aim, a comparison between an iron loss separation model and an advanced mo
Publikováno v:
2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe).
The use of converters to feed motors instead of the direct-on-line supply has increased the need to understand the behaviour of the induction machine in different operating points. The additional losses in frequency converter fed machines are caused