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.
This paper presents new trends in the dc-ac converters (inverters) used in renewable energy sources, particularly for photovoltaic (PV) energy systems. A review of the existing technologies is performed for both single-phase and three-phase systems, and the pros and cons of the best candidates are investigated. Then, a new control algorithm for a three-phase single-stage boost-inverter system is developed...
The ever mounting demand of electrical energy and the keen scarcity of conventional energy sources leads to the burgeon of distributed generation (DG) system. The main abstruse is the harmonization of the DG to the utility grid. Generally current regulated PWM voltage-source inverters (VSI) are used for synchronizing the utility grid with DG source in order to meet the following objectives: 1) To...
This paper presents the performances of an innovative electrical propulsion system based on High Torque Density Induction motors driven by transformerless 6,6kV and 3,3kV Medium Voltage PWM (Pulse Width Modulation) drives offering a 100% power redundancy. The Variable Speed Drive benefits from the MV7000 HDI (Hard Drive Induction) latest developments, in particular the NPP (Neutral Point Piloted)...
In this paper, a novel zero current soft switching (ZCS) PWM single-ended push pull (SEPP) multi-resonant inverter is proposed. Its topology structure and power control scheme is introduced. The theoretical operating waveform of this inverter which works in steady state is proposed. Its operating principle is described by analyzing the equivalent circuit of the switching mode of the ZCS asymmetrical...
Grid-connected photovoltaic power system consists of simulation of solar modules, inverter main circuit, driver circuit, maximum power point tracking circuit, the MCU control display system and the FPGA, protecting circuit. Inverter main circuit is the analog output of solar modules through the inverter main circuit DC into AC power reverse, and then through the filter, the output stable AC; one FPGA...
This paper presents a simulation model of electrical components of a grid connected 50 kW single shaft micro-turbine in MATLAB-simulink GUI environment. Micro-turbine consists of a PWM inverter to control the injected power to the load. Deploying micro-turbines with Combined Heat Power (CHP) capability make it so interesting to use in distributed generation. Employing DG creates an un-sinusoidal voltage...
The increase use of renewable dc or battery as a source has further emphasized the importance in efficient design of inverter. This paper discusses a study to determine optimum operating parameters of a commonly used pwm unipolar inverter. Variations on the input voltage level and switching frequency will be investigated to see their impacts on the operation of the inverter as well as harmonics produced...
This paper presents the design of current mode PI controller for single-phase PWM inverter. The controller is comprised of inductor current as the inner loop and output voltage as the outer feedback loop. The control design is carried out using Sisotool, which is provided in Matlab. By using this tool, users can examine the effects of changing the gain control values to system's transient response...
Dual motor drives fed by single inverter are purposely designed to reduced sizes and cost with respect to single motor drives fed by single inverter. This paper presents the speed responses behavior of Dual Permanent Magnet Synchronous Motor (PMSM) driven base on two different PWM control schemes, which are Space Vector Pulse Width Modulation (SVPWM) and Hysteresis Current Controller. These two techniques...
A photovoltaic panel fitted with a large collection of low-power inverters integrated at the level of individual solar cells is used to design an ac module. To facilitate dc-ac power conversion, the inverter aggregate is controlled using interleaved carrier pulse width modulation. Every solar cell operates at its maximum power point even when the photovoltaic panel is partially shaded. Additionally,...
The main objective of this paper is to control the speed of an induction motor by using seven level diode clamped multilevel inverter. To obtain high quality sinusoidal output voltage with reduced harmonics. The proposed Scheme for diode clamped multilevel inverter is multicarrier SPWM control. An open loop speed control can be achieved by using V/f method. This method can be implemented by changing...
This paper presents a high performance, Z-source inverter topology for grid connected PV systems and also Synchronized Pulse-Width Modulation technique in single and three phase PWM inverter for Photovoltaic power generation system. Z-source inverter has buck-boost feature, which is possible because of additional shoot through state introduced in zero state of the conventional pulse width modulated...
In this paper, the application of space vector pulse width modulation (SVPWM) technique is proposed for a two-phase full bridge voltage source inverter (VSI) having reduced number of switches. For the switching sequence, only symmetric SVPWM is considered in order to minimize the harmonic contents of the output current. By using software, three level switching patterns are determined for the six power...
The computer simulation is a powerful tool for assessment of the SVM (Space-Vector-Modulation) strategy and inverter. The methods to building the simulation model for them are analyzed, and a new modeling method is proposed and discussed. The new method models the SVM and inverter as a whole based on the start point of the SVM. The method to computing the DC link current is given based on the three-phase...
This paper presents the nine level cascaded H-bridge multilevel inverter based on a multilevel DC link (MLDCL) and a bridge inverter to reduce the number of switches. An MLDCL can be a diode-clamped phase leg, a flying-capacitor phase leg, or cascaded half-bridge cells with each cell having its own DC source. Compared to diode clamped & flying capacitor type MLDCL inverters cascaded H-bridge multilevel...
Controlled-Capacitor-Charging (CCC) is a technique to synthesize a desired voltage profile at the output from the unregulated DC at the input. Earlier models of the Controlled-Capacitor-Charging type Inverters deals with the Single-Phase Inverter and the dynamic performance are not available. This paper deals with the performance of Capacitor-Charging-type Inverter. A simple technique to design the...
Photovoltaic inverter's well all-weather featured and inherent characteristic it requires unique high reliability and high efficiency. In this paper, Dual-BUCK grid-connected inverter as the research objective, for the present study SPWM control and hysteresis current control algorithm shortcomings, a least squares fixed switching frequency hysteresis current control algorithm for Dual-BUCK grid connected...
In this paper, a new circuit implementation of Carrier Phase Shifting Sinusoidal Pulse Width Modulation(CPS SPWM) for grid connected cascaded multilevel inverter is presented. The SPWM control scheme is realized with only a single Field programmable gate array (FPGA) chip EP1K from ALRERA, Inc. and the programming language is Very High Speed Integrated Circuit Hardware Description Language (VHDL)...
This paper presents a hybrid PWM strategy for Z-source NPC converter. The technique combines the space-vector PWM with the ease of implementation of a triangular-comparision PWM. Such strategy reduces the effort of the algorithm calculation. The introduction of the distribution ratio in this technique, allows the development of a systematic approach for implementation of either conventional or any...
Minimization of the dc capacitor is an essential step towards developing and manufacturing compact low-cost hybrid electric vehicle (HEV) converter/inverter systems for high temperature operation, long life and high reliability. Previously, most papers have been focused on the AC-DC-AC pulse-width modulation (PWM) converters with relatively complicated close-loop control methods, while few papers...
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.