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The DC circuit breaker technology is one of the key technologies to build multi-terminal DC transmission network. Active DC vacuum circuit breaker (DCVCB) has become the research object. Based on the continuous transition model(CTM) and variable-step 4th-order Runge-Kutta method, sheath development stage during the post-arc dielectric recovery has been simulated and analyzed. Then the influence of...
There are many software can be carried out simulation of photovoltaic (PV) system such as PSIM and Matlab. Those software have their own advantages in the simulation of PV system. This paper proposed a joint-simulation of a stand-alone PV system based on PSIM and Matlab to achieve the maximum power point tracking (MPPT) of PV cells and the stability of PV system. In this paper, the main circuit is...
Single-phase capacitor induction motors are the most common low cost solutions for household appliance. An alternative high efficiency motor is the novel three-winding series-connected single-phase motor. This paper proposes the simulation and analysis of the fractional order model of the novel motor with full load and no load. A transfer function with a fractional derivative order has been selected...
Core losses of nanocrystalline alloy high frequency transformer (HFT) are calculated by adopting the finite element method with magnetic hysteresis effects considered. A normal Preisach model is used to represent the magnetic hysteresis during the numerical simulation. The normal Preisach model features with simple formulations and easy parameters identification. A dynamic circuit model of laminated...
In order to improve the efficiency of high voltage power supply for electron beam welder, the characteristics of LCC series parallel resonant converter with capacitive filtering are studied in this paper, and the circuit model of LCC resonance in discontinuous current mode(DCM) is established. The working mode of the converter is analyzed by mathematical time domain analysis method, and the mathematical...
Energy Router(ER), as the key technology of Energy Internet (EI), is raising more attention in recent years, especially in distribution network. However, little work has been done for simplified models of ER, which will greatly improve the combined simulation speed of ER and distribution network. This paper proposed a simplified model based on a 10kV/40MVA multi-port Energy Router utilized in 10kV...
The photovoltaic (PV) array is one of the main components of the PV system, and the accuracy of the PV array model is directly related to the validity of the simulation results. The parameters of the PV array may change with the operation conditions. Therefore, it is important to identify the parameters of the PV array model according to the measured data. In this paper, the conventional four-parameter...
In this paper the Parameters of a Double Layer Super Capacitor (DLC) Bank are experimentally identified online using Recursive Least Squares (RLS). In order to extract the signals suitable for the RLS a proper signal processing system has been implemented. Results have been verified with those obtained with an off-line common technique applied to the 2-branch model of the DLC.
A compact behavioral model for SiC power MOSFET is proposed. By applying more degrees of freedom in the channel current expression, removing the drift resistance and rectifying junction capacitance mathematical model, the proposed model can accurately reproduces those static and dynamic characteristics in datasheet. The convergence problem of original model is solved and less simulation time is needed...
Electric model based in the duality between the electric and magnetic circuit taking into account the misalignment characteristic of transformer of a Wireless Power Transfer, WPT, is proposed. Being a model based in the constructive characteristic of the transformer the model, it represents better the misalignment effect and the simulation values are more accurate in comparison with the T model that...
Linear induction motor (LIM) drive suffers heavily from low efficiency due to its large air-gap length, the end-effects, and the partial load working conditions. Therefore, an optimization method is proposed in this paper to improve the LIM drive operating efficiency from both design and control levels. First, the genetic algorithm (GA) is applied to design optimization of LIM to attain higher efficiency...
Stator inter-turn short circuit fault is one of the common faults in Double Fed Induction Generator (DFIG), the mathematical model of the DFIG is established based on the multi — loop theory, and the model of DFIG is built on the MATLAB / Simulink platform under normal condition and different degrees of inter — turn short circuit. The mathematical model of the grid side converter is analyzed to determine...
This paper presents a field-circuit coupled design and analysis method for the permanent magnet synchronous motor (PMSM) system used in electric vehicles. The time-stepping finite-element method is used to simulate the motor system, which integrates the electromagnetic field analysis of the motor prototype and the control algorithm of the drive system. A two-dimensional transient electromagnetic field...
The accuracy of PV array model directly affects the output characteristics of the PV system. In this paper, a simplified engineering model for PV array is established and the influence on the output characteristics of PV array is analyzed when Rs, Rsh and α, β, γ change. According to the actual data of a PV power station, the shuffled frog leaping algorithm (SFLA) is adopted to identify the parameters...
The shortcoming of permanent magnet (PM) machine is the de-excitation problem under fault condition, which is a main issue for aircraft application. Thus, modeling different kinds of faults accurately is of great importance. This paper presents the comparison of three different modeling methods dealing with stator winding open circuit (OC) fault and turn-to-turn short circuit (SC) fault. The modeling...
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