Converters (High power)
Use these examples to learn how to model converters for high power applications (higher than 48 V).
Load Side Converter Control
Control the RMS voltage in a load-side converter. The load is provided by a three-phase series RL element. The Control subsystem uses a PI-based cascade control structure with two control loops, an outer voltage control loop and an inner current control loop. The simulation uses step references. The Scopes subsystem contains scopes that allow you to see the simulation results.
Three-Phase Bridge Cycloconverter
A three-phase bridge cycloconverter. The cycloconverter consists of 36 thyristors and has the capacity to lower the frequency of the input voltage. The Control subsystem implements the cycloconverter RMS voltage control. It also provides pulse generation for the firing of the thyristors. The Visualization subsystem contains scopes that allow you to see the simulation results. The simulation time, t, is 1 second. The load increases when Load1 switches on at t = 0.75 seconds.
Three-Phase Matrix Converter
A three-phase matrix converter that drives a static load and draws unity power factor at the source. The Scopes subsystem contains scopes that allow you to see the simulation results.
Three-Phase Modular Multilevel Converter
Control in open-loop a three-phase modular multilevel converter (MMC). Each MMC arm consists of four half-bridge submodules. A wye-connected series RLC structure provides the load to the system.
Three-Phase Voltage-Sourced Converter (FLB)
Model a three-phase voltage-sourced converter that uses Fixed Low-side Bias (FLB) modulation. This modulation scheme minimizes the switching in the converter as at any given time one phase is not being pulse modulated. The trade-off is the need for narrower pulses for a given level of acceptable harmonics. The model can be used to support selection of suitable values for L, C and the pulse modulation scheme parameters.
Three-Phase Voltage-Sourced Converter (SPWM)
Model a three-phase voltage-sourced converter that uses Sinusoidal Pulse-Width Modulation (SPWM). This modulation scheme compares a reference sine wave with a higher-frequency repeating triangle wave in order to generate the pulses. The model can be used to support selection of suitable values for L, C and the pulse modulation scheme parameters.
Control the rectified voltage in a totem-pole power factor correction (PFC) circuit. MOSFETs Q1 and Q2 form the 50 kHz fast switching leg. MOSFETs Q3 and Q4 form the line frequency slow switching leg. The control subsystem uses a PI-based cascade control structure. The Scopes subsystem contains scopes that allow you to see the simulation results.
Twelve-Pulse Thyristor Rectifier
Control a twelve-pulse thyristor rectifier. Two thyristor converters are connected to a Wye-Delta-Wye transformer on the input. A Thyristor 12-Pulse Generator block generates the gate signals for the two converters.
Vienna Rectifier Control
Control a Vienna rectifier. The Vienna rectifier subsystem consists of three-phase legs. Each leg has one power switch and six power diodes. The Control subsystem implements a closed-loop control strategy for the Vienna rectifier using space-vector modulation. Total simulation time is 0.1 s. At time 0.1 s, the Vienna Rectifier is engaged. At times 0.4 s and 0.6 s, the load steps up on the DC side.
Three-Phase Grid-Connected Rectifier Control
Control the DC-link voltage using a grid-connected rectifier. The Rectifier control subsystem uses a PI-based cascade control structure. The Scopes subsystem contains scopes that allow you to see the simulation results. If you have a license for HDL Coder™, you can generate VHDL code for an FPGA using the Simscape™ HDL Workflow Advisor.
Three-Phase Grid-Tied Inverter
Control the voltage in a grid-tied inverter system. The Voltage regulator subsystem implements the PI-based control strategy. The three-phase inverter is connected to the grid via a Circuit Breaker. The Circuit Breaker is open at the beginning of the simulation to allow synchronization. At time 0.15 seconds, the Circuit breaker closes, and the inverter is connected to the grid. The Scopes subsystem contains scopes that allow you to see the simulation results. The inverter is implemented using IGBTs. To speed up simulation, or for real-time deployment, the IGBTs can be replaced with Averaged Switches. In this way the gate signals can be averaged over a specified period or replaced with modulation waveforms.
Three-Phase Grid-Tied Inverter Optimal Current Control
Control the currents in a grid-tied inverter system. The Optimal controller subsystem implements an observer-based linear quadratic regulator strategy. To ensure zero steady state error, this example uses the observer as an alternative to the integral action. SPST switches connect the three-phase inverter to the grid. The switches are open at the beginning of the simulation to allow synchronization. At 0.15 seconds, the inverter is connected to the grid. Then, at 0.2 seconds the inverter increases the active power supplied to the grid. The Scopes subsystem contains scopes that allow you to see the simulation results. The inverter is implemented using Ideal Semiconductor Switch blocks. If you have a license for HDL Coder™, you can generate VHDL code for an FPGA using the Simscape™ HDL Workflow Advisor.
Three-Phase Inverter Voltage Control
Control the voltage in a three-phase inverter system. The inverter is implemented using IGBTs. To speed up simulation, or for real-time deployment, the IGBTs can be replaced with Averaged Switches. In this way the gate signals can be averaged over a specified period or replaced with modulation waveforms.
Three-Phase Matrix Converter with Venturini Modulation
Use Venturini modulation techniques to compute the duty cycles and logic statements of a three-phase matrix converter that drives a static load. The control subsystem implements three different modulation algorithms: Venturini modulation, third harmonic enhanced Venturini modulation, and third harmonic injection Venturini modulation with unity input displacement factor. The maximum voltage transfer ratio between input and output depends on the modulation technique and it is equal to either q=0.5 or q=0.866. The Scope blocks show the voltages and currents V_ABC, V_abc, I_ABC, and I_abc, where _UPPERCASE is used for inputs and _LOWERCASE for outputs.
Dual Active Bridge Control
Control the output voltage of a dual active bridge DC-DC converter. Each switch is on for 50% of its switching period. A phase shift controller introduces a variable phase shift in the output bridge and controls the output voltage. The input voltage and the system load are held constant throughout the simulation. The total simulation time (t) is 0.25 s. At t = 0.15 s, the voltage reference changes.
Microgrid with Electric Vehicles V2G (Vehicle-to-Grid) Support
Model a microgrid and how to regulate its frequency by using vehicle-to-grid (V2G) support from electric vehicles (EVs).
Manage Model Fidelity Using Variants
Compare and contrast modeling different fidelity levels by using variants. The controller model uses a Variant Source block configured in Expression mode. The plant model uses a Variant Subsystem.
Test Harness to Generate High-Power IGBT Device Characteristics
Provides test harness for estimating switching loss for different parameters of a N-Channel IGBT block.
Test Harness to Generate IV Characteristics of N-Channel IGBT
Provides test harness for estimating current-voltage characteristics of a N-Channel IGBT.
Three-Phase High-Power Converter Design and Analysis Workflow
The main steps involved in designing a high-power converter. High power converters are important building blocks for future electric mobility and microgrid solutions. To design a cost effective, lightweight, efficient converter, you must perform detailed analysis of different converter design options and deployment scenarios. This example helps you to simulate the steady state, transient electrical, and thermal characteristics of a three-phase two-level converter that uses Insulated-Gate Bipolar Transistor (IGBT) devices.
Fault Detection of Electric Vehicle Charger
Analyses the fault of an electric vehicle (EV) charger using Simscape Electrical™ to model the grid, the converter, and its control unit. The reliability of these chargers is an important factor in their adoption. In this example, you use measurements from the grid and the DC side of the converter to detect a gate driver fault in the converter. To analyze and detect a fault, first you generate synthetic data for different conditions with and without faults. Then you use this data to train a classification algorithm using the Classification Learner App. Finally, you use the trained model to identify or detect faults in any phase and to generate the code for deployment on hardware. You can extend this model for other system level variations or noises by having a much larger and comprehensive training dataset.
Optimize an Inverter Liquid Cooling System
In this example you analyze the performance of a liquid cooling system for a three-phase inverter. You run detailed and reduced models (ROM) to find the steady-state temperatures and losses. You compute the optimal size of the heatsink that maximizes the inverter efficiency and minimizes lifetime cost.
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