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1. Real-time simulation experiment

Besides scientific research and industrial testing, ModelingTech also applies the small step FPGA real-time simulation technology to power electronics teaching lab. The StarSim simulator can download system models to FPGA without any FPGA programming. It is very easy to use. The experiment platform is equipped with the controller and simulator to form a closed-loop system. Students can verify and test their control algorithms. 


 

Power Electronics HIL Teaching System 


Compared with offline simulation

The offline simulation can help students study and verify the control theory and algorithm, but it is difficult to cultivate hand-on experiences and build up intuitive understanding of the controller. However, the use of real-time simulation to test the real controller can better train the students' abilities.


  • Students can touch the real controller, then transform theories and algorithms into code and run on the physical control devices.
  • Students can learn real hardware knowledge such as signal acquisition and PWM pulse generation. They can configurate, wire and debug by themselves. They can also observe real signals through the oscilloscope.


Compared with physical experiment platform

Compared with the physical experiment platform, the real-time simulation has the following advantages:


  • Real-time simulation is more suitable for grid-connected system experiment. Most of the renewable energy systems are grid-connected systems. It is generally dangerous to experiment and debug on the grid-connected system because the grid is a big source of energy, and it's easy to overflow and burn out the equipment. The real-time simulation experiment has the advantage in such situation.
  • Real-time simulation is more suitable for expensive prime mover with big size. such as wind turbine system, photovoltaic system and energy storage system. The wind turbines, photovoltaic cells and storage batteries usually are expensive and big size. And in addition, their operation needs suitable meteorological conditions.
  • Control side algorithms are open and modifiable. Many physical devices can only perform demonstrating experiments, their controllers are not open. The control algorithms of real-time simulation platform are open and modifiable.


The HIL lab solution can help more students to understand the real-time simulation and power electronics system theories, and to improve their analysis, design and debugging abilities. 


 The FPGA based HIL lab provides experiments for the following courses:

       Power electronics: Boost/Buck circuits, thyristor rectifier, H-bridge PWM control, two-level bridge SPWM experiment, etc.

       Motor control: constant V/F control of AC motor, vector control of PMSM, etc.

       Power electronics in power system: grid-connected inverter control, grid-connected three-level converter control, SVG, etc.

       Renewable energy technologies: photovoltaic system with MPPT, PMSG system, etc. 

        Note: Users can design customized teaching experiments using this platform

2. Virtual Simulation Lab Construction

        The virtual simulation experiment is a virtual experiment teaching system based on network technologies. Due to the inherence safety of real-time simulation experiment, it is quite suitable to combine the real-time simulation with the network technology to provide the virtual simulation environment and to share the experimental resource through the network. Therefore, it provides a completely new teaching and research environment for all kinds of virtual experimental courses. 

                                


         Besides operating the real-time simulation system in the laboratory, students can also complete experiments through the internet. This way greatly improves the scalability and adaptability of experimental teaching.

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