In the circuit theory, Norton and Thevenin equivalent generators are tools that simplify solutions of networks involving passive or active components. They have been extensively used in frequency domain to describe time-harmonic sources. A time-stepped evolution is instead typically include transient As a particular case latter, extended here investigate pulsed photoconducting sources, where dc...

This paper presents a fault location technique for transmission lines with minimum current measurement. This algorithm investigates proper current ratios for fault location problem based on thevenin theory in faulty power networks and calculation of short circuit currents in each branch. These current ratios are extracted regarding lowest sensitivity on thevenin impedance variations of the netw...

The paper presents a method for topology optimization of power systems as countermeasures against excessive fault current level. By the method, the magnitudes of Thevenin impedances at the critical locations would be increased for the reduction of fault current levels. In this paper, a Tabu search on the solution space with binary variables was adopted as the solution technique.

iii iv PREFACE I would like to thank my parents for supporting me all the time. At last, I would like to appreciate my fellow Nan Qin study together with me over the years. And, those technical and philosophical discussions in power system filed impel me to accomplish the project. ABSTRACT The future integration of large offshore wind farm requires a more advanced external grid for testing the ...

Lithium-ion (Li-ion) batteries play a substantial role in portable consumer electronics, electric vehicles and large power energy storage systems. For Li-ion batteries, developing an optimal charging algorithm that simultaneously takes rises time temperature into account is essential. In this paper, model predictive control-based proposed. This study uses the Thevenin equivalent circuit battery...

This paper aims to improve the stability and robustness of state-of-charge estimation algorithm for lithium-ion batteries. A new internal resistance-polarization circuit model is constructed on basis Thevenin equivalent characterize difference in resistance between charge discharge. The extended Kalman filter improved through adding an adaptive noise tracking gain unscented by introducing a dyn...

Thevenin’s theorem, one of the most celebrated results of electric circuit theory, provides a two-parameter characterization of the behavior of an arbitrarily large circuit, as seen from two of its terminals. We interpret the theorem as a sensitivity result in an associated minimum energy/network flow problem, and we abstract its main idea to develop a decomposition method for convex quadratic ...

Abstract The control strategy of electric vehicles mainly depends on the power battery state-of-charge estimation. One most important issues is lithium-ion (SOC) Compare with extended Kalman filter algorithm, this paper proposed a novel adaptive square root together Thevenin equivalent circuit model which can solve problem filtering divergence caused by computer rounding errors. It uses Sage-Hu...