The third harmonic generated voltage by salient-pole synchronous generator during 3-phase-to-ground fault

2017 ◽  
Vol 27 (11) ◽  
pp. e2401
Author(s):  
Nur Iylia Shah Riman ◽  
Mohd Faris Abdullah ◽  
Mohd Fakhizan Romlie ◽  
Zuhairi Baharudin
Keyword(s):  
Synchronous Generator ◽  
Third Harmonic ◽  
The Third ◽  
Ground Fault ◽  
Salient Pole

Third harmonic current contribution from synchronous generator with filtering during ground fault

2016 ◽  
Author(s):  
N.I. Shah Riman ◽  
M.F. Abdullah ◽  
M.F. Romlie ◽  
Z. Baharudin
Keyword(s):  
Synchronous Generator ◽  
Harmonic Current ◽  
Third Harmonic ◽  
Ground Fault ◽  
Current Contribution

scholarly journals Neutral Earthing Reactance Design in Mitigating Third Harmonic Current at the Generator Neutral

2018 ◽  
Vol 225 ◽  
pp. 04021
Author(s):  
H.A. Rahman ◽  
N.I. Shah Riman ◽  
M.F. Abdullah ◽  
H. Sakidin ◽  
M.F. Romlie ◽  
...  
Keyword(s):  
High Temperature ◽  
Normal Condition ◽  
Distribution System ◽  
Neutral Current ◽  
Synchronous Generator ◽  
Normal Operation ◽  
Fault Current ◽  
Third Harmonic ◽  
Salient Pole ◽  
Parallel Mode

Third harmonic (TH) current from salient-pole synchronous generator that return to its neutral via cable capacitance or other neutral grounding points in the network can cause the neutral earthing resistor (NER) to experience high temperature. Generator neutral earthing reactance (NERX) can be used to mitigate the TH current flowing in the neutral under normal condition. This paper aims to study the suitable design of NERX to be implemented in Universiti Teknologi PETRONAS (UTP) distribution system to reduce the TH current at the generator neutral. The model of UTP distribution system is developed using MATLAB Simulink in order to simulate the flow of TH current. NERX is then designed and implemented to the system to mitigate the magnitude of TH current. Various values of NERX are applied to the system as the neutral current and fault current are recorded and graphed. The application of 0.175 H NERX increased the TH neutral current in island mode and normal operation to 33.18 %. However, the NERX causes the TH fault current to reduce to 44.33 % under fault. For parallel mode, 78.27 % of TH neutral current and also 42.91 % of TH fault current are reduced under normal operation and fault respectively.

Calculation of the third harmonic excitation of synchronous generator using tooth flux method

2007 ◽  
Author(s):  
Huang Shaogang ◽  
Xia Yonghong ◽  
Que Shancai
Keyword(s):  
Synchronous Generator ◽  
Harmonic Excitation ◽  
Flux Method ◽  
Third Harmonic ◽  
The Third

The third harmonic current contribution during three-phase to ground fault

2016 ◽  
Author(s):  
N.I. Shah Riman ◽  
M.F. Abdullah ◽  
M.F. Romlie ◽  
Z. Baharudin
Keyword(s):  
Harmonic Current ◽  
Third Harmonic ◽  
The Third ◽  
Ground Fault ◽  
Current Contribution ◽  
Three Phase

scholarly journals Ultrafast Third-Order Nonlinear Optical Response Excited by fs Laser Pulses at 1550 nm in GaN Crystals

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3194
Author(s):  
Adrian Petris ◽  
Petronela Gheorghe ◽  
Tudor Braniste ◽  
Ion Tiginyanu
Keyword(s):  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Laser Pulses ◽  
Third Harmonic Generation ◽  
High Repetition Rate ◽  
Third Order ◽  
Third Harmonic ◽  
The Third ◽  
High Repetition ◽  
Gan Crystal

The ultrafast third-order optical nonlinearity of c-plane GaN crystal, excited by ultrashort (fs) high-repetition-rate laser pulses at 1550 nm, wavelength important for optical communications, is investigated for the first time by optical third-harmonic generation in non-phase-matching conditions. As the thermo-optic effect that can arise in the sample by cumulative thermal effects induced by high-repetition-rate laser pulses cannot be responsible for the third-harmonic generation, the ultrafast nonlinear optical effect of solely electronic origin is the only one involved in this process. The third-order nonlinear optical susceptibility of GaN crystal responsible for the third-harmonic generation process, an important indicative parameter for the potential use of this material in ultrafast photonic functionalities, is determined.

scholarly journals Phenomenological model of the third-harmonic magnetic response due to superconducting fluctuations: Application to Sr2RuO4

2021 ◽  
Vol 104 (6) ◽  
Author(s):  
Fei Chen ◽  
Damjan Pelc ◽  
Martin Greven ◽  
Rafael M. Fernandes
Keyword(s):  
Phenomenological Model ◽  
Magnetic Response ◽  
Third Harmonic ◽  
The Third ◽  
Superconducting Fluctuations

A simple way of determining induced voltages in the damping bars of salient pole synchronous generator

2016 ◽  
Author(s):  
Krzysztof Ludwinek ◽  
Jan Staszak ◽  
Tomasz Bekier ◽  
Jaroslaw Kurkiewicz ◽  
Zbigniew Gawecki
Keyword(s):  
Synchronous Generator ◽  
Salient Pole
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