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The conventional control schemes for Unified Power Quality Conditioner (UPQC) such as SRF-based control and pqtheory based control involves three-phase to two-phase transformations and complex calculations. This paper proposes an ANN controller for a Multilevel Converter based UPQC (MLC-UPQC) which eliminates the need for transformations and requirement of DSPs or FPGAs and thereby reduces the cost...
The distribution static compensator (DSTATCOM) is the FACTS device used for regulate voltage in power distribution network. In this paper, the particular application of a DST-ATCOM in voltage control mode is investigated in a power distribution system. Simulated performance of DSTATCOM is presented at varying conditions. At the end, the result of simulation with Matlab Simulink software has been presented.
In this paper, a DC-DC converter designed specifically for the case of an input voltage with flicker to generate a DC output without oscillations. The PI controller of the DC-DC converter is designed to be variable gain and adaptive to the input voltage signal. The designed system has been first tested in the Matlab/Simulink environment with the rectified form of the synthetic input voltage signals...
Cascaded H-bridge multilevel inverter is a matured topology used in several industries and also being used in renewable energy applications due to its several advantages over traditional two-level inverter. This paper is focused on the study of five-level and fifteen-level cascaded H-bridge inverter and total harmonic distortion in output voltage waveforms is compared. Phase disposition technique...
This paper presents the design and simulation of generalized digital controller based multi-pulse battery charging systems. The new generalized digital controller algorithm is presented in this paper. This control is named as generalized control since the same control block with increasing number of block can be used to develop any multi-pulse battery charging systems of any pulse number such as six-pulse...
Energy efficiency of the process equipment is achieved by the use of modern energy-saving electric drives. One of the ways of development such systems is the use of induction motor electric drive with power factor correction (PFC). The article provides analysis of PFC, built on the boost voltage converter, develop of its control system and also functional model, made in Matlab Simulink.
In this paper, a digital adaptive notch filter (DANF) based control algorithm is presented for a solar photovoltaic integrated unified power quality conditioner (PV-UPQC). Two DANFs are used for extraction of fundamental active current amplitude and also fundamental grid voltage template. The PV array is integrated directly to the DC-link of PV-UPQC. The shunt compensator compensates for the load...
this paper is devoted to validate a novel D-FACTS connected based on modified distribution static compensator (DSTATCOM) in an interconnected wind-grid system. The modified DSTATCOM is controlled by PID controller driven by a multi loop dynamic error controller scheme. A complete simulation model of the proposed system is developed in Matlab/Simulink Environment. The results show that the modified...
This paper investigates the performance of the DVR for enhancing voltage dips in medium voltage (MV) distribution networks with secondary distribution configuration. The DVR compensator is analyzed as a rectifier & inverter based voltage controller. Matlab/Simulink modeling of DVR and his control strategy are presented. The DVR performances are compared for different grid connection of the DVR...
This paper presents the single-phase sinusoidal pulse width modulated ac chopper topology with power MOSFET embedded four-quadrant switch (4QSW) realizations and examines from the power quality viewpoint the potential for its use in ac power control. The examination is conducted for resistive and inductive loads by theoretical estimate of the current harmonic content at the ac utility and load. Sinusoidal...
The performance of the DSTATCOM depends on the control algorithm i.e. the extraction of the current components. So, for this, there are various control algorithms for the control of DSTATCOM block depending on various theories and strategies like phase shift control, instantaneous PQ theory, synchronous frame theory, Adaline based theory. Each of the algorithms specified have their own merits and...
This paper attempts to design a fuzzy controller, with a view to enhance the overall power quality of an ac-ac converter and regulate the load voltage. Besides it envisages investigating the performance of three firing strategies for the power switches in an AC-AC Converter. The algorithm is articulated in order that the input current vector is allowed to closely follow the source voltage wave such...
The protection to the sensitive loads from voltage sags, swells and harmonics can be achieved using the dynamic voltage restorer (DVR) in a cost effective manner. In this paper, a new control algorithm based on unit templates and instantaneous symmetrical component theory along with complex Fourier series is used for the generation of reference voltages for a dynamic voltage restorer (DVR). These...
In this paper, a novel control algorithm has been proposed to regulate the DC bus voltage of a single phase shunt active power filter using a fuzzy logic controller. The DC bus voltage of a shunt active power filter should be controlled to compensate the filter losses on the grid. In many industrial applications, a PI controller is generally used to regulate the DC bus voltage of shunt active power...
This paper presents a comparative study through simulations of two different controllers for generation of PWM pulses for an Active Power filter namely Hysteresis Current Control and State Vector Pulse Width Modulation. A synchronous reference frame based controller for three phase three wire voltage source active power filter has been selected for the study. Constant capacitor voltage technique is...
This paper deals with an integrated solid state controller (ISSC) for an isolated asynchronous generator (IAG) used in small hydro power generation for feeding three-phase four-wire loads. The proposed ISSC is used to control the voltage and frequency of IAG. This ISSC is realized using a three-leg insulated gate bipolar transistors (IGBTs) based current controlled voltage source converter (CC-VSC),...
Active and reactive power flow control and power quality improvement of a two level Voltage Source Converter (VSC) based High Voltage Direct Current (HVDC) system operating at fundamental frequency switching is proposed in this paper. Two converter stations used in this HVDC system consists of two level VSC configuration to achieve active and reactive power control with fundamental frequency switching...
The problem of voltage sags and Swells and its severe impact on sensitive loads is well known. To solve this problem, custom power devices are used. One of those devices is the Dynamic Voltage Restorer (DVR), which is one of the most efficient and effective modern custom power devices used in power distribution networks. This paper described DVR principles and voltage correction methods for balanced...
Injection of the wind power into an electric grid affects the power quality. The performance of the wind turbine and thereby power quality are determined on the basis of measurements and the norms followed according to the guideline specified in International Electro-technical Commission standard, IEC-61400. The influence of the wind turbine in the grid system concerning the power quality measurements...
Injection of the wind power into an electric grid affects the power quality. The performance of the wind turbine and their power quality are determined on the basis of measurements, and according to the guideline specified in International Electro-technical Commission, IEC 61400-21.The influence of the wind turbine in the grid system concerning the power quality measurements are-the active power,...
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