Frequently Asked Question
Press "Ctrl + F" to find the keyword of your interest.
If you wish to have a direct link access to the video timestamps, please follow these instructions.
Found this video helpful? Why not take the whole HIL Specialist course? A Certificate is waiting for you for free at HIL Academy.
Would you or your organization benefit from having these videos narrated in your native language? Contact us and let us know if you wish to contribute.
TRANSCRIPT
Hello and welcome.
In this lesson you will learn more about thedifferent types of Diesel Genset components
supported in our library and their advantagesand disadvantages .
Let’s start by finding the components inthe Schematic Editor library.
Within the Distributed Energy resources groupthere is a Diesel Genset group of components.
By expanding that group, you will find twogroups of components: Legacy and Generic.
Legacy components contain a model of a dieselgenerator implemented as a synchronous machine
with speed and voltage control done througha governor and an exciter respectively.
Active and reactive power are controlled throughsecondary control loops that add an offset
bias to speed and voltage references.
The diesel genset can disconnect from thegrid through its controlled circuit breaker
if needed, and later sync and reconnect tothe grid.
For this reason, this component is capableof operating in grid forming and grid following
mode.
By clicking on component properties , youcan see different tabs which allow you to
change different types of parameters.
You can specify basic parameters of the dieselgenset, or you can specify electrical and
mechanical parameters of the synchronous machineas well as the governor and engine used in
the diesel genset.
The governor and engine are implemented usingWoodward's DEGOV model.
In our examples library, you can find an examplewhich demonstrates the functionalities of
the Diesel Genset legacy component.
In order to find this example, you have toclick to examples, microgrid, diesel genset,
and diesel generator.
You can find a demonstration of this examplein the links in the Materials tab.
The advantage of the legacy diesel gensetover the generic component is that, in addition
to microgrid modeling, it can be very usefulas a unit model for R&D work related to synchronous
generator control.
This means you can unlink the library andgo under the Mask to change the model according
to your needs.
The disadvantage of using it for microgridmodeling is that this component contains a
Synchronous machine which utilizes the machinesolver.
As we’ve covered before, machine solverresources are limited and dependent on the
device configuration, so you should alwaystake care when using these types of devices.
As microgrids in real life can easily havemore than one diesel genset, you may exceed
the machine solver limitation quickly.
That said, there is still a trick you canuse in order to keep both the flexibility
of legacy model and save on hardware resources.
Instead of the synchronous machine with woundrotor used inside the original legacy diesel
genset component, you can use a Three PhaseSynchronous Machine (Generic).
This is a synchronous machine model availablein the Machines library.
It is built as an easy to parametrize machine,and its solver is signal-processing based,
which doesn’t utilize a dedicated machinesolver.
By going under the mask after you have unlinkedthe component, we can make modifications to
the legacy diesel genset of this component.
Here we can replace the synchronous machinewith its generic version, and set the parameters
of the new machine to match those of the originalmachine.
This enables optimal resource usage in multi-gensetmicrogrid models based on unlocked legacy
components.
You can find a detailed explanation of thisby clicking on the help button in the bottom
corner.
Now that we’ve covered the Legacy component,let’s drag and drop the generic component.
The Diesel Genest generic system has two parts,one is the Diesel Genset (Generic) UI which
is used to interface between the Diesel Genestand inputs and outputs.
The main motivation for the UI component isthat it makes it easier to implement a remote
terminal unit with any of our supported protocols.
By entering the component properties of theDiesel Genset (Generic) component, you can
see that the component dialogue box consistsof three tabs for specifying parameters.
The General tab is associated to nominal values,which are inserted as parameters or derived
from them.
The DG tab shows parameters that are relatedto the Generator system part of the Diesel
Genset.
Currently this is just the machine speed inRPMs.
At the end there is the Extras tab, whereadditional parameters can be specified.
There is also a help button where you canfind more details about this component.
This component is capable of operating inisochronous, droop, and grid following mode.
The Machine solver is implemented using SignalProcessing, which means that those components
don’t utilize the dedicated machine FPGAsolver . With generic components you can easily
build models with multiple gensets, normallyencountered in system-level applications,
without worrying about spending machine solverresources.
The power stage includes the VBR model ofthe synchronous generator, transformer, and
the MCB that connects the plant to the grid.
The transformer can be excluded from the powerstage if it is not necessary.
Power stage elements are parametrized fromthe component dialog box.
A deeper comparison between legacy and genericcomponents was explained in lesson, Distributed
Energy Resources.
If you want to explore functionalities ofthis component further, you can check out
the Diesel Genset Generic example in the Microgridexamples library.
Also, you can check the tutorial link in theMaterials tab.
With this lesson, we’ve now covered theentire Distributed energy resources group
of components.
In the next lessons, we will look how we canuse these components to quickly make our own
Microgrid Models.
Thank you for watching.
