Flatness based control of three-phase boost rectifiers pdf

Most control techniques discussed in the literature 58 are based on dq transformation of the control signals and digital implementation and cannot be directly applied to analog controlled system, which is preferred in many applications. High quality rectifiers with reduced thd for enhanced. In this paper, a simple buck regulator at the output stage of three phase diode rectifier with bidirectional switches is proposed. Sensorless control strategies for three phase pwm rectifiers. Unity power factor control for three phase three level. Therein, the three legs of a threephase igbt bridge are connected to the power grid through an inductor with series resistance. Single phase bridge rectifiers for boost charge pms vl in average vout 100v ta 40c dc 100% vrrm 400 v ask for on demand product. This paper presents a designoriented analysis for analog controlled three phase boost rectifiers. Giri b a university mohammed v in rabat, enset, rcslnllmp2i, morocco b university of caen bassenormandie, greyc lab umr cnrs, 14032. Control of threephase voltage source converters with the.

Vienna rectifier power topology is used in high power three phase power factor acdc applications such as off board ev chargers and telecom rectifiers. Pdf flatnessbased control of a boost inverter for pv microinverter. In this study, the authors introduce an exponentially convergent estimator of load power to improve the performance of voltage source converter vsc applications. It does have the advantage of a sinewave output voltage and. Institute of control and industrial electronics, warsaw university of technology, 75 koszykowa st. The paper proposes a nonlinear control scheme for three phase voltage source converters vscs where estimation of disturbances and variations of the load current is performed with the use of a new nonlinear filtering approach, the socalled derivativefree nonlinear kalman filter.

As we shall see later, this goal is ach ieved by using three phase systems on the primary winding of the transformer. To recognize a halfwave rectified sinusoidal voltage. Abstractseveral flatnessbased current controllers for three phase threewire boost rectifiers are compared. Outputfeedback nonlinear adaptive control strategy of three. Mitigation of harmonics by threephase voltage source pwm. The pwm rectifier is a preferred choice for providing ac to d. Operating principle of three phase half wave uncontrolled rectifier the half wave uncontrolled converter is the simplest of all three phase rectifier topologies.

If the transformer secondary output voltage is 50 v, the load resistance is 5. Based on the model of three phase boost type pwm rectifier in synchronous dq coordinates, a simple control law, which transforms the rectifier control system into decoupling and linear one,is deduced based on storage function. V average dc output voltage single phase full wave diode. This thirdorder linear system, where its kalman controllability matrix is calculated by the following expression. University of almustansiriya university of almustansiriya.

In this paper, a new carrier based pulse width modulation pwm control algorithm is proposed for such. Flatness based control is applied to the threephase pwm rectifier in synchronous reference frame. Vienna rectifierbased, threephase power factor correction pfc reference design using c2000 mcu description the vienna rectifier power topology is used in highpower, threephase power factor correction applications such as offboard electric vehicle ev chargers and telecom rectifiers. In this paper, the problem of controlling threephase boost power converter is. Another approach based on transformers to form an arti. To understand the effect of a reservoir capacitor upon the rectified waveform and its mean value. The control circuits for this project used lowcost components, easily available yet giving excellent performance and satisfactory results. For this purpose, the flatness of a rectifier model is. In this paper, a new control scheme of an active boost recti. A three phase diode rectifier converts a three phase ac voltage at the input to a dc voltage at the output. Improve pfc on three phase single stage ac dc converter. In this thesis work,the theory behind a three phase pwm rectifier has been studied. Pdf flatnessbased voltageoriented control of three. A novel hysteresis current control for threephase threelevel.

Differential flatness controller for blil pfc boost rectifier ssrn. Abstractflatnessbased control is applied to the three phase pwmrectifier in. Request pdf flatness based control of threephase boost rectifiers the flatness of the mathematical models of the threephase threewire and fourwire boost rectifiers is shown. New rectifier control system based on the law has many advantages, such as simpler structure, and low total harmonic. This estimator, based on a nonlinear reducedorder observer, is used to estimate the load power and its time derivative. Chapter 12 threephase controlled rectifiers author. Meibodytabarflatnessbased control of threephase inverter with output filter. Pdf a new control law based on the differential flatness.

Concept of the flatnessbased control, where y is the output variable, y ref is the output setpoint, and u is. Lesson 2 chapter two three phase uncontrolled rectifier 1. Reference models are also used by other robust control techniques, like internal model. Although not much used in practice it does provide useful. This paper to propose yrectifier in a three phase star connection technique based power led driver topology. To control the load voltage, the half wave rectifier uses three, commoncathode thyristor arrangement. Lesson 2 chapter two three phase uncontrolled rectifier. To understand the term zmean value as applied to a rectified waveform. Decoupling control of three phase voltage source pwm rectifiers, power electronics and motion control conference, 2006 6 z. Control technique with fast response for power factor.

Current injection methods power electronics and power systems pejovic, predrag on. Flatness based control is applied to the three phase pwmrectifier in synchronous reference frame. Multiple reference framebased control of threephase pwm. For each boost converter the output current imi is related to the respective. Fuchs institute of power electronics and electrical drives, christianalbrechtsuniversity of kiel, d24143 kiel, germany, phone. The three phase balance phase current acdc rectifier with the control can make it the input line current of power converter with the unity power factor, and the current waveform distortion results increase of. In most control schemes, the output dc voltage and the input source voltages and currents. Three phase pwm rectifiersdesign, simulation study. Controlled three phase full wave rectifiers three phase full converter is a fully controlled bridge controlled rectifier using six thyristors connected in the form of a full wave bridge configuration.

Vscs, are threephase filtered rectifiers, that are widely used in the. Vienna rectifierbased three phase power factor correction. This paper presents a technique based on differential flatness. For harmonic mitigation, multi pulse uncontrolled converters are very popular due to the absence of any control system for the power diodes. Observerbased high order sliding mode control of unity power. Unity power factor control for three phase three level rectifiers without current sensors. Two trajectory planning algorithms are developed that enable fast voltage restoration after load steps by considering a load estimate. Flatnessbased control is applied to the threephase pwmrectifier in synchronous reference frame. To design the control law, dynamic equations of threephase boost rectifier are derived. All the six thyristors are controlled switches which are turned on at a appropriate times by applying suitable gate trigger signals. Three phase pfc rectifier with phase modular yrectifier.

The main objective of threephase boost rectifier is to generate threephase sinusoidal input currents in phase with the input phase voltages. In the proposed flatnessbased adaptive control fbac, which is a combined model of sections 3. Renaudineau and others published flatnessbased control of a boost inverter for pv microinverter. For inductive load there is no discontinuous conduction mode for threephase. Flatnessbased control of a boost inverter for pv microinverter application. Department of electrical engineering department of electrical engineering. The buck regulator regulates the voltage at the output stage for speed control applications. The fuzzy logic based control method and anfis are developed to improving the conduction period of the bidirectional switches. Improve pfc on three phase single stage acdc converter international journal of advanced technology and innovative research volume.

Control block diagram of the three phase boost rectifier. In this paper, a proposed control strategy is presented to improve the performance of the pulse width modulation pwm boost type rectifier when operating under different supply voltage conditions balanced, unbalanced, and distorted threephase supply voltages. Lachkarvoltage regulation of acdc pwm rectifier using nonlinear control techniques. Vienna rectifierbased, threephase power factor correction. This thesis is devoted to investigation of different control strategies for boost type of three phase bridge pwm rectifiers. Control strategy for threephase pwm boost rectifier operating under different supplyvoltage conditions. Appropriate control can provide both the rectifier performance improvements and reduction of passive components. Its operation is discussed with reference to figures 2 and 3. Predictive direct power control of threephase boost recti.

The first step in the analysis of the boost rectifier is the derivation of state space equations. Ultracompact and ultraefficient threephase pwm rectifier. Abstractflatnessbased control is applied to the threephase pwmrecti. Flatnessbased voltageoriented control of threephase pwm recti.

This design illustrates a method to control the power stage using c2000 microcontrollers mcus. Flatnessbased voltageoriented control of threephase pwm. Design of a singlephase rectifier with improved power factor. There, the transformers must be built for approximately 5% of the rated system power and this. Controlled three phase half wave rectifiers for resistive load 0 150, output voltage is zero. Single and three phase rectifiers with active power factor. The three thyristors t 1,t 3 andt 5 will not work together. A synchronous logic control based threephase boost unity power factor rectifier unit that works as an interface to ensure high energy efficiency by reducing reactive power consumption, as well as to maintain a constant dcbus voltage. On some nonlinear current controllers for threephase boost. Modeling and control of three phase boost rectifiers via. Several control techniques for pwm rectifiers are known 1623, 3069.

In case of a pfc rectifier, the amplification of the output voltage ripple would be especially disturbing, because the second line harmonic present at the control signals would be amplified 4. The flatness of the mathematical models of the threephase threewire and fourwire boost rectifiers is shown. To show the working principle of the circuit the source and load inductances l s and l d are neglected for simplicity. Schematic of the threephase threelevel rectifier using ideal sptt. Control strategy for threephase pwm boost rectifier.

Decoupling control of three phase boost type pwm rectifiers. Outputfeedback nonlinear adaptive control strategy of three phase acdc boost power converter for online ups systems m. Flatness based control of threephase boost rectifiers. Pdf flatnessbased voltageoriented control of threephase.