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21 Jan 2015 Grid-Connected PV Array Two demonstrations of a grid-connected PV array using SimPowerSystems. Author: Pierre Giroux

Pierre Giroux

Patrice Brunelle

Patrice Brunelle

Hi Bala,

This model should run in R2011b and later releases of MATLAB, but probably not in could in older ones. If you get a chance to install and run the Pre Release R2015a version of MATLAB you wil lsee that the PV Array block is now part of the SPS libraries. The new block will give you access to more than 10,000 manuafacturer preset of PV modules from the NREL System Advisory Model database.

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15 Jan 2015 Buck converter - Increased accuracy and simulation speed using interpolation in SimPowerSystems. Interpolation method of SPS R2014b to allow larger time step while preserving model accuracy. Author: Patrice Brunelle

Patrice Brunelle

Patrice Brunelle

Patrice Brunelle

Hi Andras

I have a colleague here at IREQ which has managed to compile and run the buck SPS example provided in my post in real time. He did it on our Hypersim real-time digital simulator (in-house Hydro-Quebec RT simulator). I know that he has to do some modifications to the current SPS implantation in order to make it run in real-time.

By the way we are currently working to improve the interpolation method, to make SPS more accurate and to run faster SPS models with power electronic devices. The good thing is that I think these improvements should also benefit those who want to implement such SPS applications in real time.

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10 May 2012 Grid-Connected PV Array Two demonstrations of a grid-connected PV array using SimPowerSystems. Author: Pierre Giroux

Pierre Giroux

Patrice Brunelle

Patrice Brunelle

Hi Yuvaraj

Regarding the problem with C-compiler I recommend that you report the issue to the customer support service of The Mathworks.

Thanks you for your interest in the demo and to SimPowerSystem.

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03 May 2012 Three-Phase AC-DC-AC PWM Converter SimPowerSystems model of a three-phase PWM VSC-based power supply. Author: Patrice Brunelle

Patrice Brunelle

Patrice Brunelle

Patrice Brunelle

Hi Manu,

Please note that the DC link capacitance is C= 1500e-6 F (not 75 000e-6 F as stated in my previous response).
Calculation of the Wc/Pnom ratio is correct.

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26 Apr 2012 Three-Phase AC-DC-AC PWM Converter SimPowerSystems model of a three-phase PWM VSC-based power supply. Author: Patrice Brunelle

Patrice Brunelle

Patrice Brunelle

Patrice Brunelle

Hi Manu,
The size of the DC link capacitor of a VSC converter is determined by the Wc/Pnom ratio where Wc = energy stored in the capacitor bank at nominal DC link voltage (Joules) and Pnom = nominal power of the converter. This ratio is usually a fraction of a cycle, typically between 0.25 cycle and 0.75 cycle.

In our demo, C=75 000e-6 F, Vc=750 V, Pnom=50 kW

Wc/Pnom= 0.5*1500e-6*750^2 / 50e3= 0.0084 sec = ½ cycle for 60 Hz frequency

Please note that this ratio is given in the model (see comments in blue) .

In other words, it means that, with the energy stored in the capacitor, the inverter could theoretically deliver nominal power to the load during 8. 4 ms when the inverter is disconnected from the rectifier.

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26 Apr 2012 Visualizing Wave Propagation Visualize wave propagation through media with different impedances and propagation velocities. Author: Dick Benson

Dick Benson

Patrice Brunelle

Patrice Brunelle

Excellent job Dick.
When you disconnect the load and let the line open-circuit you can even observe the well known phenomea of bouncing back wave: http://www.allaboutcircuits.com/vol_2/chpt_14/4.html

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14 Feb 2012 Grid-Connected PV Array Two demonstrations of a grid-connected PV array using SimPowerSystems. Author: Pierre Giroux

Pierre Giroux

Patrice Brunelle

Patrice Brunelle

The PVarray model was built using R2011b. It is possible that some features available in SPS 11b cannot be run in previous releases.

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