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...

As known, nonlinear loads in power systems originate harmonic distortion and quality issues. Converter-interfaced exhibit a behaviour as well may largely contribute to increase the pollution. The nonlinearities introduced by PLL-synchronization control originate, indeed, coupling mechanism between fundamental frequencies. These effects are not captured traditional Norton/Thevenin equivalent con...

This paper describes methodology for the computation of the electromagnetic transients in the high voltage substations, taking into account transients on the substation grounding system. Simulation technology is based on the system decomposition. Interconnections between different subsystems are done in each time step using Thevenin equivalents. Frequency dependent impedance of grounding conduc...

Owing to the degradation of performance a retired battery and unclear initial value state charge (SOC), estimation power (SOP) an echelon-use is not accurate. An SOP method based on adaptive dual extended Kalman filter (ADEKF) proposed. First, second-order Thevenin equivalent model established. Second, parameters are estimated by ADEKF: (a) SOC filtering algorithm, that uses process noise covar...

Lung function responses to inhaled cotton dust were evaluated in a group of 58 healthy subjects by spirometry (MEFV curves) and forced random noise impedance parameters. Twenty-one of these subjects were also examined by body plethysmography to assess changes in airway resistance (Raw). For the study group as a whole, alterations in lung mechanical function after exposure to cotton dust were de...

Batteries, which are used as energy storage tools, widely today and of great importance. Batteries developed in many different technologies. Today, batteries appear areas such computers, electrical vehicles, electronic devices aircraft. Since they various fields, battery preferences can be determined according to the purpose use. In this study, properties usage purposes nickel-cadmium (Nickel-C...

• Multivector Model Predictive Control (MMPC). control of machine side converters. grid WEC emulator. OWC-based model. Oscillating Water Column (OWC) is one the most well-known wave energy converter (WEC). Typically, OWCs are installed in rocky shores or custom-built breakwaters. However, since profile more favorable an open sea, it can also be a point absorber order to increase extraction. Thi...

The power quality analysis is an essential issue in the integration of distributed energy resources to grid. Recent standards regulate harmonics disturbances due increasing penetration intermittent sources interconnected with grid employing converters. This paper aims analyze wind turbine system based on a Squirrel Cage Induction Generator (SCIG) driven by Electromagnetic Frequency Regulator (E...

In this paper, a new model based on the thevenin equivalent circuit for investigating the ultra-saturation phenomenon during the energization of a loaded power transformer is presented and its effect on the differential protection of the transformer is considered. The ultra-saturation phenomenon causes the mal-operation of the power transformer differential protection. So, the description a...

The article describes the results of research aimed at identifying parameters equivalent circuit a lithium-ion battery cell, based on HPPC (hybrid pulse power characterization) tests. OCV (open voltage) characteristic was determined, which approximated using functions various types, while making their comparison. internal impedance cell also identified in form Thevenin RC with one or two time c...