The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The paper deals with a high efficiency boost rectifier for high rotational speed Gen-Set applications. It is tailored around a permanent magnet synchronous generator (PMSG) featuring an open end winding configuration. According to such a configuration the generator stator windings are connected on one side to a three level T-type unidirectional rectifier, and on the other side, to an auxiliary two-level...
The photovoltaic (PV) source simulators are widely used to test solar inverters, evaluate their control algorithms and study their grid integration issues in the laboratory settings. Many commercial programmable dc power supplies can be re-programed to be PV simulators. Due to the bulky output dc capacitors, the dynamic response and the bandwidth of these PV simulators are significantly limited, which,...
This paper concerns the application of three-level neutral point clamped (NPC) voltage source inverter (VSI) to electrical energy conversion of the photovoltaic (PV) power plant. The grid-connected 3-phase NPC inverter is powered via the split DC-link composed of the capacitive divider (Fig. 1). It enables the usage of two DC-buses independently which can be supplied by the separated boost-type DC-DC...
A microgrid is a clear energy system consisting of demand management, storage, generation system and loads which are capable of operating in parallel or independently with the main power grid. There are some issues in the inverter circuit design which are, high frequency switching loss and noise. In addition, an electrostatic generator generates high voltage DC and low current. Any types of wave distortion...
In this paper, control and energy management of a grid-connected PV-Battery hybrid power system are investigated. In this configuration power transfer from the photovoltaic system as a primary energy source and battery storage to the distribution grid is accomplished using double-stage conversion made up of a pair of DC-DC converters and a three-phase three-level diode clamped inverter (DCI). An appropriate...
A single phase seven level inverter topology with fewer components using proportional integration controller is presented in this paper. The pulse width modulation is employed to generate gating signals for power switches. The proposed topology can be implemented for three phase application. The Separate dc sources can be replaced by solar PV arrays. The complete system is simulated using MATLAB/SIMULINK...
Many new cascaded multilevel inverter (MLI) topologies have recently been proposed and published in the literature. All proposed topologies demand significant amount of semiconductor components and input dc supplies, which is considered the main drawback for the implementation of three phase cascaded MLIs. This paper proposes a new generalized concept that could be employed within any existing cascaded...
In this paper, a new multilevel inverter topology which can be operated in both symmetrical and asymmetrical configurations has been proposed. In order to produce all steps of voltage at output, four different algorithms are proposed to find the value of DC sources. The proposed topology reduce switch count, gate driver circuits, total voltage blocking capability and isolated DC voltage sources which...
A novel, efficient multilevel inverter topology has been proposed which generates the seven level output voltage using seven power switches only along with simple and modern pulse width modulation technique. This inverter has offered the advantages of, less component count, reduced switching loss, high efficiency and low cost. Due to the less number of switch components the complexity in generation...
In this paper, a new three input ports generation system with open-winding generator for wind/solar hybrid generation system is proposed. By using an open-winding topology can save a set of full-controlled power electronic device, which simplifies the structure and increases the system reliability. In order to maintain the generating efficiency of PM generator, d axis current is set to zero, battery...
In this paper, a high frequency linked cascaded multilevel inverter (CMLI) is presented, which brings simplicity for CMLI to connect in renewable systems and electronic vehicular applications. The requirement of multiple isolated dc-supplies and their balancing is a critical drawback in CMLI and for this reason; it is very difficult to connect a CMLI directly with any system. The utilization of multi-winding...
A new Cascaded Multilevel inverter (CMLI) concept is presented in this paper, which is applicable to any existing CMLI topologies. The proposed new three phase MLI topology consists of level generator stage (LGS) and phase generator stage (PGS). While the PGS contains a specific structure of 12-semiconductor switches and 12-diodes, the LGS structure depends on the existing CMLI topologies. The main...
This paper concentrates on the control of power flow in single stage photovoltaic energy conversion system. The conversion structure has a twofold requirement that consists in ensuring that the current injected to both load and grid obeys to the grid connection standards and sets the DC bus voltage similar to the reference voltage given by the MPPT algorithm. The advanced functions that can be added...
In this study, the power extraction from oscillating water column device is done by using three level active rectifier and three level inverter which is controlled by using NTV-SV-PWM method. The mid-point balancing of the DC-link is achieved by using a look-up table, aiming to improve the efficiency, the response time of the system and the quality of the power transferred to the grid.
In this paper, a new single-phase multilevel inverter topology suited for distributed DC sources is proposed. The proposed inverter is comprised of a voltage-level generator connected in series to the input of the classical H-bridge. The voltage-level generator is only able to generate positive DC voltage levels at its output. The H-bridge is used to generate the negative and zero voltage levels....
On the background of an AC/DC hybrid microgrid on a small island, operation mode of the microgrid was divided into diesel generator power supply independently, inverter power supply independently and compositive power supply according to the cooperation of the diesel generator and the interface inverter. Switch control strategy of the microgrid operation mode was proposed in this paper based on hierarchical...
This paper shows how to use modular Marx multilevel converter diode ($\text{M}^{3}$ CD) modules to apply unipolar or bipolar high-voltage pulses for pulsed power applications. The $\text{M}^{3}$ CD cells allow the assembly of a multilevel converter without needing complex algorithms and parameter measurement to balance the capacitor voltages. This paper also explains how to supply all the modular...
Wind power conversion systems are a widespread renewable energy source and, as such, have been studied intensely over the past two decades. Wind energy conversion system is connected to the electrical grid through a power converter, an LC filter and a step-up transformer. It is necessary to know the efficiency of the whole energy transfer system and to know the efficiencies of each individual part...
In this time, Multilevel Inverter (MLI) innovations turn into an unimaginably primary decision in high power medium voltage energy control range. Despite the fact that multilevel inverter has various advantages but since of utilizing more number of semiconductor switches, it has disadvantages in the vein of high level, extensive size and high cost. To defeat this issue another multilevel inverter...
In this paper a Marx generator principle has been used to generate a 1.6 kV pulse at the output. Two groups of capacitors with anti-parallel charging is employed [6]. In order to reduce the switching and conduction losses resonance phenomenon has been used to trigger the switches. Insulated Gate Bipolar Transistor (IGBT) switches are employed to connect the charged capacitors in series to supply the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.