scholarly journals Quantitative modal analysis of optical power flow and energy loss in photonic structures with a dipole emission source

2014 ◽  
Vol 22 (15) ◽  
pp. 18499
Author(s):  
Sujin Choi ◽  
Seungin Baek ◽  
Dajeong Im ◽  
Hyun Kook Kahng ◽  
Hwi Kim
Keyword(s):  
Energy Loss ◽  
Modal Analysis ◽  
Power Flow ◽  
Optical Power ◽  
Emission Source ◽  
Photonic Structures ◽  
Dipole Emission

Optical power flow in plastic-clad silica fibers

2002 ◽  
Vol 41 (36) ◽  
pp. 7588 ◽  
Author(s):  
Svetislav Savovicć ◽  
Alexandar Djordjevich
Keyword(s):  
Power Flow ◽  
Optical Power ◽  
Silica Fibers

scholarly journals Static analysis of voltage stability with DFIG

2016 ◽  
Vol 19 (3) ◽  
pp. 5-12
Author(s):  
Binh Thi Thanh Phan ◽  
Thao Thi Thu Huynh ◽  
Au Ngoc Nguyen
Keyword(s):  
Stability Analysis ◽  
Modal Analysis ◽  
Static Analysis ◽  
Power Flow ◽  
Voltage Stability ◽  
Jacobian Matrix ◽  
Wind Generation ◽  
Power Network ◽  
Power Flow Calculation ◽  
Static Voltage Stability

The static voltage stability analysis is carried out by V-Q sensitivity or Q-V modal analysis. These analyses are based on the Jacobian matrix of power flow calculation. This is regarded as load bus stability analysis. With DFIG of PQ mode, the wind generation bus is considered as the PQ bus. Due to the limits of converters, these PQ buses became very special and this influences on the voltage stability examining. This paper also examines the penetration level and the location of wind generation injection based on voltage stability. The reliability of the algorithm is illustrated in a study of 14 buses power network.

scholarly journals Power Transport Theorem Based Decoupling Mode Theory for Wave-Port-Fed Transmitting Antennas

2021 ◽  
Author(s):  
Renzun Lian ◽  
Mingyao Xia
Keyword(s):  
Modal Analysis ◽  
Power Flow ◽  
Magnetic Energy ◽  
Input Power ◽  
Energy Principle ◽  
Characteristic Mode ◽  
Mode Theory ◽  
Phase Mismatching ◽  
Analysis Theory ◽  
Transport Theorem

Employing the work-energy principle based physical interpretation for characteristic mode theories (CMTs), it is exposed that: strictly speaking, the existing CMTs are the modal analysis theories for incident-field-driven scattering objects and lumped-port-driven transmitting antennas, but not for wave-port-fed transmitting antennas, so they cannot provide an exact modal analysis to wave-port-fed antennas. This paper focuses on establishing an effective modal analysis theory for wave-port-fed antennas. Power transport theorem (PTT), which governs the transport process of the power-flow passing through wave-port-fed antenna, is derived. It is found out that the input power contained in PTT is the source to sustain a stationary power transport. Under PTT framework, a novel modal analysis theory — decoupling mode theory (DMT) — is established for the antenna. By orthogonalizing input power operator (IPO), the PTT-based DMT can construct a set of energy-decoupled modes (DMs) for the antenna. A novel concept of "electric-magnetic energy-decoupling factor" / "electric-magnetic phase-mismatching factor" is introduced for quantifying the coupling/matching degree between modal electric field and modal magnetic field. A field-based definition for modal input impedance and admittance is proposed as an alternative for the conventional circuit-based definition. Three somewhat different but not contradictory physical meanings of modal significance (MS) are summarized.

Fourier modal analysis on photonic structures with time-dependent perturbations

2012 ◽  
Author(s):  
Joonsoo Kim ◽  
Hyeonsoo Park ◽  
Hwi Kim ◽  
Byoungho Lee
Keyword(s):  
Modal Analysis ◽  
Time Dependent ◽  
Photonic Structures

scholarly journals Bidirectional Isolated DC-DC Converter with High Static Gain: Analysis and Experimentation

2020 ◽  
Author(s):  
Ygor Pereira Marca ◽  
Ivo Barbi
Keyword(s):  
Energy Loss ◽  
Power Flow ◽  
High Efficiency ◽  
Buck Converter ◽  
Dc Microgrids ◽  
Leakage Inductance ◽  
Battery Chargers ◽  
Electric Vehicle Battery ◽  
Bidirectional Power Flow ◽  
A Current

<div>A bidirectional isolated DC-DC converter with high efficiency and static gain, formed by the combination of a FBZVS-PWM and a current fed push-pull converter is presented in this paper. These features are accomplished through a partial regeneration of the energy stored in the transformer’s leakage inductance with an active clamping voltage circuit performed by a buck converter. Normally, current-fed push-pull converters have an energy loss in passive snubber circuits. The converter description, operation principles, waveforms, modeling, design and the experimental results of a 2000 Watts prototype are presented. The proposed converter can be implemented in high power applications that require bidirectional power flow and galvanic isolation, such as DC microgrids and electric vehicle battery chargers.</div>

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