Modeling and Control of Single-Phase and Three-Phase Voltage Source Inverters

Place: Madrid, Spain

Date: 23th and 24th of May, 2017

Course fees:

  • 990 Euros* per person (Exc VAT) for industrial participants.
  • 750 Euros* per person (Exc VAT) for academic participants.
    * (A 3% fee is applied for credit card payments). Payment will be due before the training.
    Fees includes 2-day training, training materials, coffee breaks and lunches.

> Register Now

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Instructors:

– Dr. Antonio Lázaro (Carlos III University of Madrid, Spain)   > Biography
– Dr. Emilio Bueno (Alcala University, Spain)   > Biography

 

Language: English
Coffee breaks and buffet lunch will be offered by POWERSYS.
The course starts at 9:00 a.m. and ends at 6:00 p.m. every day.

 

Public and technical background required

The training course is recommended to everybody interested in the theoretical aspects and practical design issues of digital control of voltage source converters. Having previous experience in power electronics and circuit simulation is useful, but beginners with no background in those topics will also benefit from the course.

 

Objectives

The objective of the course is to acquire the basic abilities about controller design for voltage source converters. Starting with a basic study of the control problem, the more important control structures will be covered together the main aspects to be into account in the digital implementation. Design procedures based on software tools like PSIM and SmartCtrl will be applied and illustrated through practical design cases.

 

Program

Day 1:

Section I: Modulation techniques in DC/AC converters

  1. Inverter concepts and inverter topologies
  2. Basic Output Voltage Control
    • Square wave operation
    • Phase Shift Modulation
  3. Fundamentals of PWM modulation
    • Unipolar Sinusoidal PWM Modulation
    • Bipolar Unipolar Sinusoidal PWM Modulation
    • 3-ph PWM modulation
    • Practical considerations
  4. Advanced Modulation Techniques
    • Third-Harmonic Injection PWM
    • Space Vector Modulation
    • Selective Harmonic Elimination

 

Section II: Single-Phase Voltage-Source Inverter

  1. Problem Specifications
  2. Current Control
    • Average Model and Small Signal Model
    • Feed-Forward
    • PI Design
  3. Digital Current Control
    • Signal conditioning and sampling
    • Synchronization between sampling and PWM
    • Discretization strategies of PI controllers
    • Origin and effect of digital delay
  4. Voltage Control
    • Average Model and Small Signal Model
    • Feed-Forward
    • PI Design
  5. PSIM Simulation results
  6. ANNEX A, B: SmartCtrl Equation Editor Code

 

Section III: Three-Phase Grid-Tied Voltage-Source Inverter

  1. Space Phasors and Two-Dimensional Frames
    • Fundamentals through PSIM simulations
  2. dq Current Control of Grid-Tied Inverter
    • Average and Small-Signal Models of L filter
    • Average and Small-Signal Models of LCL filter
    • Feed-Forward Compensations
    • Design with SmartCtrl
    • PSIM simulation
  3. Alfa-Beta Current Control of Grid-Tied Inverter
    • Comparison with dq Control
    • Resonant Controllers
    • Design with SmartCtrl
    • PSIM simulation
  4. Digital Implementation of the Current Control
    • Signal conditioning and sampling
    • Synchronization between sampling and PWM
    • Discretization strategies of PI and resonant controllers
    • Effect of digital delay
    • Design with SmartCtrl
    • PSIM simulations
  5. DC BUS Voltage Control
    • Average Model
    • Small-Signal Model
    • Feed-Forward Compensations
    • Design with SmartCtrl
    • PSIM simulations

 

Section IV: Grid-Synchronization in Three-Phase Power Converters

  1. Introduction
  2. Grid Codes
  3. Grid-Synchronization Fundamentals.
  4. PLL Tecniques
  5. Instant Alfa – Beta PLL
  6. Synchronous Reference Frame PLL (SRF PLL)
  7. Sequence detector based on Second-Order Generalized Integrator (SOGI)
  8. SOGI-SRF PLL
  9. Design with SmartCtrl
  10. PSIM simulations

 

 

Day 2:

Section V: Three-Phase Voltage-Source Inverter (AC Voltage Generation)

  1. Average Model
  2. Small-Signal Model
  3. Control Loops Design with SmartCtrl
  4. Inner Loop Frequency response validation with PSIM´s AC sweep
  5. Outer Loop Frequency response validation with PSIM´s AC sweep
  6. Influence of the Current Sensing Strategies

 

Section VI: Complete digital design of Three-Phase Grid-Tied Voltage-Source Inverter: SmartCtrl design PSIM simulation and HW experiments

  1. Description of the hardware set up: Three-Phase Grid-Tied Voltage-Source Inverter and SoC based digital control
  2. SoC control parametrization with SmartCtrl Console
  3. Experiments: voltage steps, reference steps, load steps, etc.

 

Methodology

The overall methodology is based on theoretical explanation on main concepts and details followed by practical implementation of the complete design procedure: controller design by means of SmartCtrl, PSIM simulations and hardware validation by means of a scale – down prototype.

  • 60% theoretical contents
  • 20% practical exercises by means of guided PSIM simulations and SmartCtrl designs
  • 10% exercises using a hardware demonstrator

A complete set of SmartCtrl and PSIM exercises already developed will be provided to the audience together with the rest of course materials.

During practical exercises, attendees will be asked to change some component values and/or modify the schematics of the provided examples and carry out simulations.

For hardware experiments SmartCtrl Console will be used to modify control parameters of a digitally controlled three-phase PFC. Attendees will experiment different effects of the digital control design by means of reference and output current step changes.


Computer and temporary PSIM and SmartCtrl licenses:

Each participant will have to bring a personal computer.

PSIM and SmartCtrl temporary licenses will be provided for the duration of the course.

> Register Now

 


General conditions for training:

Please register as early as possible if you plan to attend the training. As soon as the minimum of participants is reached, POWERSYS will confirm the course. The registration to the course includes the lunches and coffee breaks. Participants will have to pay 100% in advance before the course.

 

Cancellation can be made according to POWERSYS’ General Conditions for courses:

Withdrawal from the Course:
In case you cannot attend the course after having registred, please contact us as soon as possible at marketing@powersys.fr

  • In case of cancellation three weeks OR MORE before the beginning of the course, the participants will not be charged.
  • In case of cancellation less than three weeks before the beginning of the course, POWERSYS will charge the participant 50% of the course fees.

Please note that POWERSYS will not reimburse any travel and/or accommodation expenditure in case of cancellation of the course. We recommend you to make your travel arrangements once the course is confirmed.

 

For French participants:

POWERSYS est enregistré en tant que prestataire de formation (auprès du Préfet de la Région Provence-Alpes-Côte d’Azur sous le numéro 93 13 13256 13). Une convention de formation peut être établie sur demande avant la date de formation.

 

Contact for any additional information:

Please feel free to contact us for any further information marketing@powersys.fr

 


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