Results 171 to 180 of about 263,888 (208)

Protection technique based on -zero sequence voltages for generator stator ground fault

IEE Proceedings - Generation, Transmission and Distribution, 2004
A mathematical model on a coil basis is used to study the characteristics of the zero sequence voltage of a generator. The proposed technique for the stator ground fault detection simultaneously takes into account the fault contributed zero sequence fundamental voltage and the fault contributed third-harmonic voltage (Δ-zero sequence voltage).
N.L. Tai, Q. Ai
openaire   +1 more source

A space vector modulation for a low zero-sequence voltage output

IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02, 2003
A space vector PWM (SVM) algorithm is designed to prevent zero-sequence currents between tandem inverters in three phase applications. The development is motivated and illustrated by a GTO/IGBT inverter system, feeding a large three phase motor. In applications where harmonic emissions are highly undesirable, the low power/fast switching IGBT is used ...
openaire   +1 more source

Static series compensator for voltage dip mitigation with zero-sequence injection capability

2003 IEEE Bologna Power Tech Conference Proceedings,, 2004
In this paper, a static series compensator (SSC) for performing compensation of voltage dips including a zero-sequence component is presented. The control strategy is based on a feedback action, thus achieving series compensation independent on the system parameters and their variations.
C. DI PERNA, VERDE, Paola, A. SANNINO, M. H. J. BOLLEN   +3 more
openaire   +2 more sources

Differential Protection Based on Zero-Sequence Voltages for Generator Stator Ground Fault

IEEE Transactions on Power Delivery, 2007
This paper introduces a new differential protection scheme based on zero-sequence voltages with 100% coverage for generator stator ground faults. Analysis shows that the Delta-fundamental zero-sequence voltages and the Delta-third-harmonic voltages at the generator neutral and the terminals will change simultaneously, and they present some similar ...
Tai Nengling, Juergen Stenzel
openaire   +1 more source

Study on the adaptive impedance relay based on zero sequence voltage polarization

7th IET International Conference on Advances in Power System Control, Operation and Management (APSCOM 2006), 2006
An adaptive impedance relay based on zero sequence voltage polarization is proposed in this paper. The dynamic operating border of this relay is completely the same with operating border of the fault phase voltage UKφ of fault point, and its earth resistances possess sound adaptivity.
null Lan Yang, null Duo Chen, null Xiangjun Zeng, null Ting Fang Yang, null Zhong Chen   +4 more
openaire   +1 more source

Dependence of Zero-Sequence Voltage Measurements on Static Eccentricity of PMSMs

IEEE Transactions on Industrial Electronics
The impact of the static eccentricity fault on electrical machines has been extensively explored in the literature. Various contributions have provided valuable models, such as the modified winding function approach (MWFA), which effectively characterizes the inductance behavior of an eccentric permanent magnet synchronous machine (PMSM).
Carsten Klein, Marco Palmieri, Matthias Nienhaus, Emanuele Grasso   +3 more
openaire   +2 more sources

Instantaneous Zero Sequence Voltage for Grid Energy Balancing Under Unbalanced Power Generation

2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019
An instantaneous zero sequence voltage injection method is presented in this paper. The key novelty of this method lies in the ability to provide instantaneous zero sequence voltage references using stationary abc-framework variables with no numerical iterations and no phase-locked loops.
Ricardo P. Aguilera, Pablo Acuna, Christian A. Rojas, Georgios Konstantinou, Josep Pou   +4 more
openaire   +1 more source

Capacitor Voltage Balancing for Alternate Arm Converter Based on Conduction Angle and Zero-Sequence Voltage

IEEE Transactions on Power Electronics, 2023
Rui Zhang, Shunliang Wang, Junpeng Ma, Peng Wang, Kejun Qin, Tianqi Liu   +5 more
openaire   +1 more source

Minimizing the battery losses in MMC via Zero-Sequence Voltage injection: an open challenge

2024 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)
This work focuses on battery-powered Modular Multilevel Converters (MMC) and explores several methods aimed at improving overall efficiency by reducing the energy losses of electrochemical sources. MMCs represent a valid alternative to more traditional structures such as Voltage Source Inverters (VSI) because they possess several advantages.
Spina I., Brando G., Dannier A.
openaire   +2 more sources

Cancer epigenetics in clinical practice

Ca-A Cancer Journal for Clinicians, 2023
Veronica Davalos, Manel Esteller
exaly