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Supercapacitor, as a new type of energy storage device, has broad application prospect in the power system and others. It is very significant to establish an accurate model to reflect the actual job characteristics for supercapacitor reasonable use, performance optimization and system simulation. This article summarizes all kinds of supercapacitor model, points out the characteristics of the existing...
Supercapacitor is a new type of energy storage element, and its performance is easily influenced by temperature. In order to have more precise energy storage characteristic research of supercapacitor, a modified porous circuit equivalent model is proposed on the basis of porous circuit equivalent model in electric double layer supercapacitor. The simulation results show that modified porous circuit...
VIENNA rectifier with simple structure, which is widely used in charging systems for electric vehicle, realizes the operation of unit power factor and low harmonic. However, grid voltage unbalance will aggravate the dc-link voltage ripple and input current THD. A novel control scheme is presented to solve the impacts of three unbalanced grid voltage for VIENNA rectifier in this paper. The enhanced...
With the development of economy, the accelerating urbanization and the increase of car ownership and road traffic, the traffic congestion and safety problem has been becoming more and more serious. Especially, a car would encounter a great number of signalized and unsigned intersections in the regionalized road network. In this paper, we illustrate the control theory of the unsigned intersection and...
Switched reluctance motors (SRM) have many differences between traditional motors in performance analysis because of the special structure. First, the characteristics and structure parameters with large influence on the performance of SRM is discussed. Then a method for modeling and simulation of SRM system based on Maxwell and Simplorer is proposed. Finite element model of SRM with different structure...
The exact battery model has always been a thorny problem in battery management system (BMS). In order to meet the actual working conditions, battery model parameters should be identified from a variety of experimental data (charging, discharging and rest periods). In this paper, we propose a parameter identification method based on iterative learning for the equivalent circuit battery models. This...
Sediment microbial fuel cells(SMFCs) are considered an alternative renewable power source for remote environmental monitoring. Maximum power point tracking is very important in MFC energy harvesting system. A novel maximum power point tracking method with a zoned approach is proposed to achieve the goal of fast tracking maximum power point. Simulation results by Matlab/Simulink software show that...
The model identification of power battery has always been the key and difficult point in the battery management systems(BMS). In this paper, the theory and method of fractional calculus are introduced in the strategy of modeling the equivalent circuit of power battery, which can break through the limitation of integer order model. Based on the fractional algorithm, the time constant of the circuit...
This paper discusses a dynamic model designed for Helicobacter pylori and antibiotic response. Respectively, with the integer order and fractional order of the equivalent circuit model to describe time-kill curve for different concentrations of antibiotic and Helicobacter pylori, where the parameters and variables in the model are introduced from external data. The fitting effect of the two is compared,...
With the increasing application of photovoltaic, the micro-inverter with interleaved flyback module operating in continuous conduction mode (DCM) and discontinuous conduction mode (DCM)is more popular. However, its difficult to control output current of interleaved flyback micro-inverter because the transfer function has right-half-plane (RHP) zero in CCM and low gain in DCM. To solve this problem,...
This paper presents three implementation algorithms of compound elements pseudo-transient analysis to find DC solutions for nonlinear LSI circuits. In former researches, CEPTA was implemented in SPICE-like simulator with the merits that the size of Jacobian matrix is not expanded during the calculation. While the inserted pseudo parts are converted to some certain equivalent circuits, the conventional...
A simulation system of distribution network design and development based on similarity principle is introduced. This simulation system includes primary simulation system and secondary control system, the primary system simulates a 10kV neutral indirectly earth distribution system, which includes a bus, four feeders with different types and different length. System structure and parameter calculation...
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