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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...
Energy Router has received lots of attention in a great amount of applications due to its powerful functionality and great flexibility. Capacitor charging strategy plays a key role in the operation of energy router. The focus is on the submodule applied in the hybrid multilevel energy router in this paper. The submodule is constituted of a three-level rectifier and an isolated DC-DC converter in which...
Even though some methods have been put forward to solve the drift problem and the low frequency fluctuation problem of the neutral point potential (NPP) for three level neutral point clamped converters (TL-NPC), they are all just suitable for SPWM or SVPWM technologies. In some medium/high voltage high power applications, where SHEPWM is utilized to modulate the reference voltages, the drift problem...
Recent computing systems consume more than several hundred watts of power and a robust PDN design is critical to minimize power/ground (P/G) voltage fluctuation and get stable performance. In most cases, the IC package (PKG) PDN determines mid-frequency P/G noise characteristics. The PDN of our target IC package consists of more than ten thousands staggered microvias and tens of layers, representing...
This work provides the guidelines to calculate the size of the DC-link capacitor to contribute with additional energy - for a short period of time - than the photovoltaic panel can supply under normal operating conditions. First, a model of a three-phase electric generation system is used that combines photovoltaic panels and an inverter with an LCL filter at network side. In addition, a control algorithm...
Modular Multilevel Converters (MMC) are being widely considered for shipboard applications. Designing such converters through multi-objective optimization is of interest, because such an approach allows the trade-off between competing objectives (for example, mass and loss) to be explicitly and quantitatively identified. However, doing so can require 104–106 time domain simulations in order to rigorously...
To improve the dynamic performance and the anti-disturbance capability of the photovoltaic energy storage system, a control strategy of the bidirectional DC-DC converter based on Linear Active Disturbance Rejection Control (LADRC) is proposed in this paper. Firstly, the mathematical model of the bidirectional DC-DC converter is established. And then, the double closed-loop control strategy based on...
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.
When the fault occurs in the ring DC system, the fault process can be divided into the current discharge stage, the diode freewheeling stage and the steady-state phase under the AC power supply. This paper mainly studies the capacitor discharge stage. Firstly, the multi-terminal DC system is decomposed into n single-ended systems. Secondly, write the state equation of the single-ended system and solve...
In the grid-connected modular multilevel converter (MMC), grid faults not only cause the current to be higher than the rated current, but also bring the unbalanced issues to the inner unbalanced currents and arm voltages. In this paper, a multi-variable coordinated control method which is employed in the d-q coordinate is presented. First, a parameter is introduced in the calculation of the grid currents...
This paper presents the reliability-oriented design of a two-terminal active capacitor proposed recently. The two-terminal active capacitor has the same level of convenience as a passive capacitor with reduced requirement of overall energy storage. In order to fully explore the potential of the proposed concept, a comprehensive design procedure is necessary to optimally sizing the key components of...
Dual active bridge (DAB) with input-series output-parallel (ISOP) structure is capable to interconnect low voltage DC micro grid with medium/high voltage DC distribution grid, named as DC solid state transformer (DCSST). This paper presents a combined decoupling control strategy for the DCSST, which aims to achieve input voltage sharing among sub-modules and enhance voltage control of the parallel...
Split-transistor compensation (STC) is introduced as a new compensation technique applicable to power management of Internet-of-Things (IoT) devices. An extension of the split-length compensation (SLC) technique [1]-[3], STC significantly reduces the area of the required on-chip compensation capacitor, while maintaining the two major benefits of SLC: reduced minimum supply voltage and no additional...
In this study, a novel mode l of a Hybrid Electric Vehicle (HEV) based off the 2016 Chevy Volt is implemented and examined. The study will also examine the operation of the modified Series Parallel Hybrid Electric Vehicle (SPHEV) and modeled powertrain components contained within. The 2016 Chevy Volt has six unique modes of operation; however, the dual Permanent Magnet Synchronous Motor (PMSM) EV...
We are considering the problem of controlling a single-phase Multicellular inverter with LC output filter. The control objectives are: (i) generating a sinusoidal voltage with amplitude and industrial frequency fixed by the reference signal, (ii) ensuring a good convergence of the voltages across the flying capacitors. The controller is designed using the backstepping approach in its adaptive versions...
The purpose of an Optimal Power Flow (OPF) problem is to determine the state of an electric power transmission system that optimizes a given system performance and satisfies its physical and operational constraints. The OPF problem can be mathematically modeled as a nonlinear programming problem with discrete and continuous variables. In this paper, we investigate the efficiency of the Branch-and-Bound...
A significant advancement in computational science and the development of various simulation based software have replaced the necessity of testing circuit construction practically. This simulation software can model, design, analyze and synthesize various complex circuitries. Usage of software in basic designs has made the circuit building and testing process more convenient and less expensive. Software...
In this paper, an output current differential control method is presented for an input series output parallel (ISOP) system. The method includes a specialized output current sharing loop to achieve power equilibrium in modules, and avoids steady- state sharing errors due to parameters mismatch. However, in the transient process, inconsistent parameters can produce individual input voltage and output...
This paper presents a magnetic coupling resonant wireless power transfer (MCR-WPT) system. Two separated coils form a loosely coupled transformer. The primary side adopts a Class-E amplifier, which produces high frequency sinusoidal current to excite the primary winding, inducting a high frequency AC voltage in secondary winding. The secondary side adopts a Class-E rectifier to rectify the high frequency...
Super-capacitor with the features of high power density and long life is used as a new kind of energy storage methods for electric bus. State of charge (SOC) indicates the remaining power, which is very important for super-capacitor bus. In this paper, a SOC estimate method based on sliding mode observer is studied. The design of sliding mode observer is based on the “two-branch” equivalent circuit...
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