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Energy storage technology is an important measure for power output of new energy generation system. T-type three-level structure is adopt as the topology of energy storage inverter. Mathematical model of grid-connected operation in ABC coordinate system and dq coordinate system is built. A double closed loop control strategy of which inner loop current and outer loop power control is proposed. The...
This paper addresses the problem of cloud and networking resources mapping in distributed and hybrid cloud environments. In this context private and public resources are acquired and combined to set up tenant dedicated virtual infrastructures to fulfil distributed applications requirements. An exact algorithm is proposed to map jointly nodes and links of the requested virtual infrastructure graph...
The modular multilevel converter (MMC) has become the most promising converter technology for high power applications. However, to get more number of levels in the output voltage, a conventional MMC requires large number of submodules. The main technical challenges of an MMC, with a large number of submodules, are the requirement of large number of semiconductor switches, submodule capacitors and...
This paper proposes possibilities of Y-connected three-leg topologies, that are built from combinations of two-level and three-level legs (hybrid structures). Therefore, four topologies are studied and compared in aspects such as harmonic distortion of output voltages and rating of power switches. Additionally, semiconductor losses comparisons in different scenarios of load (either high current or...
An analytical approach for accurate calculation of the conduction and switching power losses associated with the switching devices in the 5-Level 3-Phase Back to Back E-Type Converter (5L3ϕ BTB E-Type Converter) has been proposed in this paper. The 5L3ϕ BTB E-Type Converter is composed by two different multilevel topologies: the 5-Level E-Type Inverter and the 5-Level E-Type Rectifier. The power losses...
This paper presents a new topology of multilevel converter that allows to increase the number of output voltage levels reducing the numbers of semiconductors necessary in comparison with the standard multilevel converters like Active Neutral Point Clamped (ANPC) and Stacked Multicell Converter (SMC). This new topology called Reduced Multilevel Converter (RMC) consists of a tandem connection of basic...
Paralleled inverters have the merits of high power rating, improved reliability and convenient maintenance, but zero-sequence circulating current (ZSCC) will occur and lead to current distortion and system loss. The ZSCC control is more complicated when adopting three-level topology and increasing paralleled number. This paper addresses the suppression of ZSCC in multi-paralleled three-level T-type...
In this paper, three configurations of three-phase ac-dc cascaded converters are presented. They are referred as basic configurations, and are composed by two three-phase bridges, where the second bridge is cascaded to the first by means of a three-phase injection transformer. Basic configurations have one bidirectional option (composed only by IGBT switches), and two unidirectional ones (composed...
The photovoltaic system works in stand-alone or grid applications, where the operation at the maximum power point (mPP) of generation is required. Maximum Power Point Tracking (MPPT) algorithm allows increasing the output power and it works commonly with a DC-DC converter. This work shows a novel analysis and the basic features of response about different topologies of DC-DC converters with MPPT algorithms...
This paper present the analysis and design of a converter Boost with low current stress, the proposed topology is based in the integration of multi-phase and multi-stage scheme. The design methodology enable obtain a high CD voltage with low ripple in voltage and, for validate this converter is presented the design for output power of 100W, the simulation results obtain validated the propose for design...
In this paper, the authors describe the design of an 80kW power converter for an electrostatic precipitator using SiC MOSFETs. The structure of the converter is based on the series parallel resonant topology, PRC-LCC, with a capacitor as output filter. This topology can cope adequately with the parasitic elements of the step-up transformer involved in the application. The SiC switches present lower...
Magnetic Core Characterization is returning as a critical area of research. This is due in part to the rise of wide bandgap semiconductors that have enabled new applications, new converter topologies and system designs that are pushing the limits of passive components. Similarly, new core materials are opening design spaces previously unfilled by legacy cores. With all of these new opportunities,...
In this work it is presented a two-phase open-end winding induction motor (IM) driven by an improved current source inverter (CSI). The proposed inverter has independent full quadrant operation, lower DC-link current value, high magnetics power density, 25% more efficient and high AC output voltage waveform quality compared to conventional CSI solutions. A back-to-back AC-DC-AC current source converter...
Undeniably, the focus of several works revolved around finding a process of unification to follow along the modeling of mechatronic systems. This paper is a part of a general research designed to apply topology for the modeling of complex mechatronic systems. Notably, a topological approach to model a Wind Turbine is adopted in this study. The Wind Turbine model under study is modeled using a topological...
A soft-switching solution implemented to the traditional bidirectional DC/DC converter is developed. The soft-switching cell, which composed of three auxiliary switches, one resonant capacitor and one resonant inductor, is equipped in the traditional bidirectional DC/DC converter to realize circuit ZCT or ZVT operations in both energy transmission directions. Two driving methods are presented to charging...
Cooperative containment problem is presented in this paper for discrete-time multi-agent systems with different dynamics subject to structural uncertainties. The topologies of the agents could be assumed that one leader contains a directed path to all the follower agents. The paper obtains some novel and challenging results on cooperative containment control problem of discrete-time multi-agent systems:...
This paper investigates distributed fault detection of wireless sensor networks with a class of faulty sensor node, fault source isolation and networked communication topology accommodation design issue considering filtering performance. The wireless sensor network in this paper is composed of spatially placed sensors which has a changeable networked communication topology, different state-space representations...
This paper proposes the improved topology and control strategy of three-phase cascaded bridgeless rectifier (CBR) suitable to serve as the rectifier stage for a medium/high voltage multilevel converter. Compared with traditional H-bridge based multilevel rectifiers, the proposed topology adopts much fewer fully-controlled devices, which greatly reduces the control complexity, thus increasing the system...
The parameters of the resistance model are obtained through various experiments under different lamp power in this study. Polynomial fitting curves are obtained for these parameters to get the values under some certain lamp power. Then simulations in PSIM are conducted by using the calculated values to verify the reliability and accuracy of the method adopted. Good agreement is obtained between the...
In this paper, a new quasi Z-source inverter based on new capacitor basic units (CAQZSI) is proposed. It is possible to develop the proposed topology by using n numbers of the basic units that is one of the main advantages of the proposed CAQZSI. The boost factor equation, voltage and current equations of the capacitors, diodes and inductors are obtained for the proposed topology and developed CAQZSI...
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