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This paper introduces analysis for the performance of voltage source inverter fed from wind energy system. The inverter is used to control the voltage and frequency of an induction motor, so that its speed can be controlled. A self-excited induction generator is used to convert mechanical energy to electrical energy, as it has many advantages in terms of ease of maintenance, self-protection against...
this paper presents Model Predictive Control (MPC) to tie three-phase quasi Z-Source Inverter (qZSI) to the utility grid. Regularly, to control the capacitor voltage in qZSI based on MPC, the inductor current is the key factor. Here, the proposed algorithm has the features of decreasing the number of sensors where the inductor current sensor is removed to improve the cost and foot print of the control...
This work is interested by modeling and simulation of an association Inverter-asynchronous machine. the modeling of the asynchronous machine made by a study, by using the simplifying assumptions. the order of the converter (inverter) is based on the method — Pulse Width of Modulation (PWM)-. Which brought better a quality of control, dynamics and precision.
Due to the increasing energy demand there is a need of energy storage and advanced power conversion system. Energy which are available from the renewable energy sources can be efficiently store and can be convert to feed load as per the requirement. There are some power quality issues or poor voltage regulation where the load is supplied by renewable energy source. Therefore it is required to design...
This review paper represents the modeling design and controlling function of solar Photovoltaic (PV) gridconnected systems from various sources available through literature. The converter system is composed of an isolated DC-DC converter and a three phase DC to AC Voltage Source Inverter (VSI). This type of converters is designed to obtain small signal transfer function which is used to design of...
This paper proposes Z (Impedance)-source inverter for single phase grid connected photovoltaic system. Unlike traditional voltage source inverter, Z-source inverter uses shoot-through (ST) duty cycle and modulation index to control output voltage. By modifying the traditional pulse width modulation (PWM) techniques, shoot through duty is accommodated to buck or boost the input voltage. Z-source network...
Cascaded multilevel inverters are widely used in various fields, from oil and gas, power supply installations, to power quality devices. While there are many advantages of the cascaded multilevel inverter such as low voltage stress for each switching device and higher power quality, the main downside for this type of inverter is relatively large number of switching device it needs in an installation...
This paper presents a power scheme known as back-to-back used as a power conditioner for a wind turbine system which uses a permanent magnet synchronous generator (PMSG). The back-to-back power structure consists of a three-phase pulse width modulated (PWM) active rectifier, a dc-link bus voltage and a three-phase PWM inverter. Both power conditioning structures can be operated under traditional and...
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....
This paper presents some considerations on designing and simulating permanent magnet motors with AlNiCo magnets. The design parameters of the motor considered during the simulations, along with the equation describing the motion and equations describing the involved electric model are presented. Finite Element Method Magnetics (FEMM) was used to make a bidimensional magnetostatic simulation of the...
The aim of this paper is to present the design of a linear quadratic regulator (LQR) based on optimal control of single phase grid connected inverter with an LCL output filter used in solar applications. The converter model is set in the D-Q rotating reference frame where integral action is added to the grid current in order to cancel steady state error. The controller is tested in steady state, dynamic...
As a basic logic unit of integrated circuit, the stability of parameters of inverter have a direct effect on the performance of system. This paper starts from parametric drift of traditional inverter caused by the variation of threshold voltage of MOSFET. Then a new parametric drift-resistant inverter is proposed. This structure utilizes compensation circuit to solve parametric drift such as the decrease...
In this paper, a trending concept of module-integrated converter called as photovoltaic (PV) balancers is presented and verified on a practical data of solar PV system. This concept enables the maximum power point tracking for each module, which historically reduces the requirements for traditional power converters and significant economical impact on overall configuration of solar PV systems. In...
The main objective of this paper is to investigate the maximum penetration level of distributed renewable energy sources (DRESs) in a real radial low-voltage network. For this purpose, the business as usual (BAU) scenario, where no control scheme is applied to the installed DRESs, is compared with two conventional droop control techniques, namely the active power curtailment and the uniform power...
This paper presents a locking-accelerated DPLL based on multi-output bang-bang phase detector (MOBBPD) with reused most significant bits (MSBs). The bang-bang structure has simple implementation by eliminating the sensitive time-to-digital converter (TDC), while MOBBPD allows for reduced loop locking-time due to the multi-output. To further accelerate the loop locking, a scheme of reusing the MSBs...
In this paper a structure for direct 4-BIT XOR/XNOR logic cell is proposed. This structure is proposed using pass transistor logic with FinFETs. This structure has less delay for the reason that its critical path consists of a minimum number of transistors. The basic advantage of this circuit is their symmetry in the logic. This design has a full voltage swing at the outputs and hence it has the good...
Development and research for power converters is focused on high power density, high modularity, low costs as well as high reliability and efficiency. The use of multilevel converters, like Neutral Point Clamped (NPC) Converters, in high power applications in the range of 1.5 MW up to 6MW can be favorable because of the filter size reduction and therefore reduction of weight and total volume of the...
The dynamic result of static synchronous series compensator is presented in this paper. A voltage source inverter equipped with a dc source is used as an SSSC (static synchronous series compensator) to examine the effect of this device in controlling the power flow through transmission line. This device works not only as a reactive power compensator but has the ability of supplying and absorbing active...
In order to increase the conversion efficiency in photovoltaic (PV) systems, different configurations and topologies were developed. Depending on the application, the converters used for grid connection are built using one or two conversion stages. The advantages of the converters with a DC-stage are mainly the distributed maximum power point tracking algorithm per PV string, a wider range of operation,...
The integration of photovoltaic sources to conventional grid and increased utilization of nonlinear loads yield major power quality issues in the distribution system. Such power quality issues are commonly reduced by photovoltaic fed distributed static compensator (PV-DSTATCOM). In this paper, a comparative analysis of the PV-DSTATCOM performance for different controllers is shown. The controllers...
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