Typhoon HIL Forum - Recent questions in Modeling

Instability due to coupling challenges.

Tue, 21 Apr 2026 09:55:26 +0000

My microgrid model is not is not working properly because I am having challenges configuring the couplings between elements. The frequency measurement of my PV system is dropping fast and the grid forming diesel generator is severely distorted. Could someone advice me the best way to set the couplings.

Instability with Constant Power Load in 2-bus system

Mon, 20 Apr 2026 12:20:03 +0000

Hello everyone,

I’m comparing load models in a simple 2-bus system using Typhoon HIL. With impedance loads, the system behaves correctly, but when using a constant power load the system becomes unbalanced.

At the load node, the power values are not as expected and oscillate between negative and positive values.

I’ve checked time step, execution rates, and parameters, but the issue persists.

Could this be due to the inherent behavior of constant power loads, or a modeling issue?

Thanks in advance.

Error with Dynamic Table and Three-phase Variable Load

Wed, 15 Apr 2026 06:08:34 +0000

Hello everyone,

I'm trying to use a Dynamic Table component to feed a power profile (P and Q) from a CSV file into a Three-phase Variable Load. My goal is to make the load follow a time-varying active and reactive power pattern.

What I did:

CSV file has three columns: time, P, Q (p.u.).
I placed a Dynamic Table and imported the CSV directly (graphical method).
I connected the scaled P to Pref and scaled Q to Qref of the load.
I connected a constant 1 to the Enable input of the load.
I also tried connecting Balance_en = 0 and ROC = 0 as suggested in some posts.

The problem:
When I try to compile the model, I get a huge list of errors

I want to know if it is another method to make an variable load using data from a csv. PLEASE HELP

How to create own carrier waveform generator block for sawtooth or triangular waveforms

Thu, 26 Mar 2026 07:36:08 +0000

Frequency Limitation on Triangular Waveform Generator

Thu, 26 Feb 2026 12:24:29 +0000

Is there any limitation on the Frequency for Triangular Wave generator. Currently I am Using it generate a triangular waveform of 1kHz frequency. However, when I set the frequency to 2 kHz or above, the output becomes clipped instead of triangular.

Issues Using Three-Phase Core Coupling in Parallel Inverter Simulation

Tue, 02 Dec 2025 06:57:11 +0000

Hello, I am currently running a parallel operation simulation of two inverters, with a linear resistive load at the output. A three-phase core coupling is added to each inverter (current source on the left side and voltage source on the right side). According to the simulation results, the second inverter’s voltage and current are controlled normally, but the output current of the first inverter cannot be delivered to the load, and its current waveform becomes distorted, although the voltage control is normal. As a result, parallel control cannot be achieved.

If I change the three-phase core coupling configuration to “voltage source on the left side and current source on the right side”, the control performance becomes even worse.

I would like to ask: what is the correct way to use the three-phase core coupling in parallel inverter simulations? Do I need to modify any parameters inside the coupling block? Thank you.

What is wrong that I get this warning?

Mon, 25 Aug 2025 07:17:16 +0000

Bad voltage loop consisting of Idc, Three Phase Inverter1, Vs1 detected. The Basic Electrical.Short Circuit: Three Phase Inverter1.Im_short_dc inside Three Phase Inverter1 is degenerated, for the switch permutation (1 1 1 1 1 1).

Three Phase Inverter modell settings: Internal modulator and fixed carrier frequency, according to the basics tutorial

How can I customize any battery cell in the Typhoon HIL simulator?

Wed, 30 Jul 2025 08:23:23 +0000

I want to model a non-lithium battery storage system in the Typhoon HIL simulator. For that I need to build the battery cell first, then use it in the battery system. How can I customize the battery cell?

Challenges in Simulating Shaded Photovoltaic IV Curves with Boost Converter in Typhoon HIL

Tue, 29 Jul 2025 07:19:02 +0000

Good afternoon, I’m Igor from UFSC.

We were testing some curves for the Typhoon HIL with a boost converter and, when testing the same thing as in other simulators, we noticed that the curves with shading, generated via CSV, have a certain "problem" when fixing the value of D, where the voltage becomes fixed.

First, we tested with .ipv files, and the voltage never went above 37V, even after changing the maximum voltage and other parameters of the curve. So, although the curve was drawn as we intended (Image 1), it didn’t work as expected and the voltages were limited.

Then we tested other possibilities to circumvent the issue, trying to run with .ipvx curves, with curves without shading (Image 2), and it worked perfectly. With the Duty cycle at 0.5 — meaning with an output of 400V it should remain at 200V — it was perfectly stable and surpassed the "limit" of the .ipv.

However, as this wasn’t our goal, we wanted to obtain a curve with shading from 2 modules. We tested with a manually created curve using data from the CSV (Image 3). Even though it wasn’t very accurate, it reached much higher voltages. However, when setting the desired voltage (400V) and applying the curve with D=0.5, the voltage varied significantly — it didn’t remain at 200V, but fluctuated between 150-250V.

I thought it could be due to the curve being a Normalized IV, but another test with a curve without shading worked perfectly.

So we found a temporary solution: we added more than one module to obtain shading in the Boost (Image 4). It worked, but it wasn’t possible to properly visualize it to generate .pdf, .png, or any other type of graph that characterizes the curve and its behavior, like we had with "Photovoltaic" in Scada. We need this for research article purposes.

So our questions are, is there any way to:

Generate a .ipvx curve with shading using the Waveform Generator? (in a way that works accurately.
Make the "Normalized IV" curve I generate via CSV more accurate?
Plot a graph for the solution of n modules in series?
Generate a .ipv with CSV that works for a wider voltage range?

The answer to any of these questions could help us improve our work.
Thank you in advance!

why is my C function in Typhoon HIL reading corrupted values despite correct input signals?

Mon, 21 Jul 2025 06:18:47 +0000

Hi everyone,

I'm working on a model that uses a C function to generate switching pulses. The function receives the necessary inputs, including measured current values that have been Clarke-transformed.

The issue I'm facing is that the switching pulses behave incorrectly — they seem erratic and don't follow the expected pattern. After some debugging, I found that the current values entering the C function appear to be in the millions, even though the probe reading right before the C block shows a maximum of about 2 A.

This drastic difference in scale is clearly affecting the control algorithm, resulting in invalid switching decisions.

I'm happy to share my model or files if needed. Any help or guidance would be greatly appreciated!

Thanks in advance.

Request to Restore Original IEEE 13-Node Feeder Example

Fri, 11 Jul 2025 19:01:52 +0000

Hi,

I accidentally overwrote the IEEE 13-node test feeder example and would like to restore the original version.

Could you please send me the original .tse file or let me know how to reset the default examples without reinstalling?

Why am I getting a different response between real time simulation and VHIL? Also between 2024 and 2025 Typhoon versions

Mon, 05 May 2025 08:08:13 +0000

Hi,

I am working on a Typhoon HIL simulation: it consists on a DAB converter in Open Loop: file attached to this message.

It was working properly in real time simulation as shown in the next pictures with Typhoon version 2024. Since there is a newer version 2025, real time simulation in version 2024 is not running anymore: only in virtual HIL and it continues working correctly.

When running the same simulation in real time but in version 2025, the pictures do not match with the proper DAB behavior as before, on version 2024. Only in virtual HIL it seems a more similar behavior and I do not understand why. I have compared Typhoon configuration parameters between versions in order to find any difference but it seems similar.

So I have two questions: is possible that simulation works different between versions? Is possible that simulation works different with real time or virtual HIL?

HIL SCADA Debugging c functions

Wed, 26 Feb 2025 09:02:45 +0000

My model consists of a dozen c functions. How do I efficiently debug errors like:

'F_chain' undeclared (line: 4066)

Please, make the needed corrections and restart the compilation.

Compilation process interrupted.

I have found the error of course by going through all the functions. My question is where can I find the file with this line 4066 to know exactly where the error is?

HIL SCADA / Code Editor / Control Commands

Mon, 24 Feb 2025 08:41:06 +0000

Why am I able to use the Control Commands section in the Code Editor with particular SCADA elements and not with others?

e.g., When using a 'Slider macro widget' I can use the Control Commands section, while with the 'Digital display widget' the Control Commands are greyed out?

Thanks

Microgrid library / Generic Elements / Unconnected ports

Fri, 21 Feb 2025 16:22:56 +0000

Hello,

A number of Generic modeling elements, e.g., 'Variable Load (Generic)', along with associated UI, etc., are present under the Microgrid library in the Schematic Editor. Obviously, this is the state-of-the-art modeling approach currently followed at Typhoon HIL.

None of these Generic elements is available in 'single-phase' mode. Given that 'warnings' and/or 'errors' may arise due to the presence of unconnected ports, is it advisable to use these modeling elements to emulate 'single-phase' mode, i.e., connect one of the phases and the neutral to the rest of the model/circuit, according to modeling needs?

Any ideas?

Thanks

How to create a variable frequency rectangular signal, frequency value given by signal in model?

Tue, 11 Feb 2025 08:50:01 +0000

- frequency given by signal in Schematic Editor, not in SCADA

- constant amplitude and offset

- only signal processing blocs, use of electrical circuit should be avoided

Thank you for your help.

How can I use standard headers like time.h? How do I know which libraries are pre-installed?

Thu, 23 Jan 2025 13:20:30 +0000

Hello,

I want to generate a random number at startup of the VHIL. For that I want a random seed. However I was not able to use srand(time(NULL)).

What is the alternative to #include <time.h> in the schematic editor?

How can I know thich libraries are already installed?

Then I also have a more genral questions to the c-functions. How to debug? "Exception occured: ... please make the needed correction..." is not helping.

Thanks in advance! The help is appriciated a lot.

Best,

Fabian

Equivalent of Simulink "Weighted Sample Time" block element in Typhoon HIL Control Centre

Wed, 22 Jan 2025 11:59:00 +0000

Hello community,

I am building from scratch a control logic in Typhoon HIL control center (THCC) having as a basis a Simulink model.

I am encountering an issue with a block element that is not present in THCC. The block element is called "Weighted Sample Time" and it's used in the following cases: "Add, subtract, multiply or divide the input signal by weighted sample time or just output weighted sample time or weighted sample rate."

Any suggestion on how to deal with this issue would be highly appreciated.

Extracting Positive and Negative Sequence Control for Grid Fault Conditions

Thu, 09 Jan 2025 07:22:27 +0000

correct procedure for adding mosfet data for loss analysis?

Fri, 13 Dec 2024 11:29:05 +0000

wanted to perform MOSFET (C3M0075120D Wolfspeed )loss analysis on a converter model. the xml file is available from manufacturers' side and the similar model was also used in the tutorial video of MOSFET loss calculation.still not able to populate the parameter columns on addition of xml file. where can be the issue.

Regards
Jeeva

MMC design using carrier phase shifting control

Tue, 10 Dec 2024 14:29:24 +0000

I'm trying to implement MMC as per the carrier phase shifting control. The triangular waveform generation has a phase_delay variable which is a vector and the output of the block should be a vector. But it is creating an error of dimension mismatch in each of the blocks named PWMa1. Other blocks named a2, b1, b2, c1 and c2 are the same copy of a1. I'm attaching the typhoon file. Can you help me with this error?

File

Ready-made models

Mon, 25 Nov 2024 12:17:35 +0000

Hello All,

My main goal is to develop and test an Energy Management System for an energy community.

I would like to know if there are ready-made simple models e.g., for a residential consumer/prosumer, an EV, etc., that I can use for creating an energy community, according to the specifications that I was given. I want to avoid developing these models from scratch since my main goal is to develop an EMS and not the models for each of the energy community participants (residential consumer, PV, small wind generator, EV, etc.).

Would be grateful to receive some relevant feedback.