@@georgschett801 Yes for sure I Will share/spread the videos with my own professionnal network. Also that would be great, if you can share power plants (controls systems,mechanical engineering...) videos. I know there is many ideos on the subject (free or payed ), but these ones are correct for good overview of Industrials and Power systems.
@@James-brayton Thanks for your suggestions. What I plan in the near future is protection of power grids. Be aware that I am not a specialist in mechanical topics and my simulator is for electric networks.
I would like to see a simulation of the same vsc HVDC link that is connected to multiple vsc links. I realize that you were showing only a single phase of the three phase interconnections. As displaying all three phase of simultaneously may be too confusing.
Georg. have you thought of putting your material on a Coursera course ? I think it would be really useful if you would get a couple of exercises for each lecture, followed by a solution in the next lecture. The combination of your material and the simulation software is very powerful. Thanks.
Dear Mike, thanks for your kind feedback. I thought about it as well. However for the time being I had to focus on getting the software debugged and complete. So far the software is used by students and teachers in class room lessons, as a supportto conventional lectures. But anyway it is a great suggestion. All the best, George
No. The point is the DC source. In VSC the DC Voltage source is constant whereas in the classic converter the current source is constant (and the voltage varies). In VSC however you need an devices which can switch on and off the current, which is a transistor (or IGBT).
@@georgschett801 Thank you for your reply! I am still very new in the domain of HVDC, so I am not quite familiar yet with all the new terms. My complete question would be this: after generating electricity, say through nuclear, we step up the AC voltage to the high transmission voltages, but in order to convert then this HVAC into HVDC, my logical thinking would be to use a rectifier which can withstand such high voltages. However, I usually see in electrical schematics the symbol of VSC instead of the rectifier, which made me question the nature of VSC. When we use the term "DC converter", I suppose we mean rectifier (AC to DC) or inverter (DC to AC), and are these used to convert HVAC to HVDC? If yes, what role does the VSC or CSC play?
@@svwtsvfcb You are close. AC to DC is in fact a rectifier and DC to AC is an inverter. Converter is the more generic term, a device which transforms electricity from one form to another, for example dc-dc or 50Hz-60Hz or so. CSC is a more traditional conversion technology (see my hvdc classic video) and is based on thyristors. It is less flexible but still produces lower losses. For example CSC needs a functioning grid at the load side in order for the thyristors to be able to commute. Thus black start is not feasible (at reasonable costs). It is used for bulk power transmission at very high voltages. VSC on the other hand is not yet mature for very high voltages and it is not yet used for very high power transmission. The losses are still a bit higher because you switch on AND OFF the DC current in order to get an AC voltage (normally Pulse Width Modulation). In order to interrupt the DC current in the transistor you have to very quickly increase it`s resistance and this is the main reason for the higher losses. But the big advantage is that it can be used for black starts (i.e. for a grid with a total blackout for example), you can damp oscillations and you can rapidly change the direction of the power flow.
@@georgschett801 Thank you for your response! So we could say, in this case, a CSC is a converter used to convert AC to DC and afterwards DC to AC, and it is made out of thrysistros. VSC on the other converts AC to DC and also DC to AC using a PMW for reactive and active power flow? Perhaps also frequency and power factor control
Perfect explanation of HVDC basics and power flow concept, very nice simulation as well, thank you very much.
thx you very much!! helps a lot! one of the best explanatoins on youtube!
Well that one of these good & useful videos that i like to check out! Thank you for sharing such valuables informations.
Thanks for your kind feedback. Pls. share it with your contacts so I get visibility. All the best!
@@georgschett801 Yes for sure I Will share/spread the videos with my own professionnal network.
Also that would be great, if you can share power plants (controls systems,mechanical engineering...) videos.
I know there is many ideos on the subject (free or payed ), but these ones are correct for good overview of Industrials and Power systems.
@@James-brayton Thanks for your suggestions. What I plan in the near future is protection of power grids. Be aware that I am not a specialist in mechanical topics and my simulator is for electric networks.
Very interesting simulator
Thanks 👍
It is fair to say that it is an interpretation of VSC power flow. The actual converter is not controlled or designed in this way.
Sure, it is a way to make the case principally as also stated in the video.
Nice one ❤️❤️❤️👍👍👍👍
Thanks for the feedback!
I would like to see a simulation of the same vsc HVDC link that is connected to multiple vsc links. I realize that you were showing only a single phase of the three phase interconnections. As displaying all three phase of simultaneously may be too confusing.
Sir can we build the prototype of this VSC HVDC system on hardware as a Final year project.
👏👏👏
Georg. have you thought of putting your material on a Coursera course ? I think it would be really useful if you would get a couple of exercises for each lecture, followed by a solution in the next lecture. The combination of your material and the simulation software is very powerful. Thanks.
Dear Mike, thanks for your kind feedback. I thought about it as well. However for the time being I had to focus on getting the software debugged and complete. So far the software is used by students and teachers in class room lessons, as a supportto conventional lectures. But anyway it is a great suggestion. All the best, George
Excellent explanation! May I share your simulation please, all for educational purposes, I´m student at Mexico. Regards!!!
Many thanks for your kind feedback!! Of course you can share this material, it is public. All the best!
So in the end, VSC is nothing else than a rectifier or inverter where we use IGBTs?
No. The point is the DC source. In VSC the DC Voltage source is constant whereas in the classic converter the current source is constant (and the voltage varies). In VSC however you need an devices which can switch on and off the current, which is a transistor (or IGBT).
@@georgschett801 Thank you for your reply! I am still very new in the domain of HVDC, so I am not quite familiar yet with all the new terms.
My complete question would be this: after generating electricity, say through nuclear, we step up the AC voltage to the high transmission voltages, but in order to convert then this HVAC into HVDC, my logical thinking would be to use a rectifier which can withstand such high voltages. However, I usually see in electrical schematics the symbol of VSC instead of the rectifier, which made me question the nature of VSC.
When we use the term "DC converter", I suppose we mean rectifier (AC to DC) or inverter (DC to AC), and are these used to convert HVAC to HVDC? If yes, what role does the VSC or CSC play?
@@georgschett801 Like basically we have converters (rectifiers and inverters) that incorporate VSC valves (IGBTs) and phase reactors?
@@svwtsvfcb You are close. AC to DC is in fact a rectifier and DC to AC is an inverter. Converter is the more generic term, a device which transforms electricity from one form to another, for example dc-dc or 50Hz-60Hz or so. CSC is a more traditional conversion technology (see my hvdc classic video) and is based on thyristors. It is less flexible but still produces lower losses. For example CSC needs a functioning grid at the load side in order for the thyristors to be able to commute. Thus black start is not feasible (at reasonable costs). It is used for bulk power transmission at very high voltages. VSC on the other hand is not yet mature for very high voltages and it is not yet used for very high power transmission. The losses are still a bit higher because you switch on AND OFF the DC current in order to get an AC voltage (normally Pulse Width Modulation). In order to interrupt the DC current in the transistor you have to very quickly increase it`s resistance and this is the main reason for the higher losses. But the big advantage is that it can be used for black starts (i.e. for a grid with a total blackout for example), you can damp oscillations and you can rapidly change the direction of the power flow.
@@georgschett801 Thank you for your response! So we could say, in this case, a CSC is a converter used to convert AC to DC and afterwards DC to AC, and it is made out of thrysistros.
VSC on the other converts AC to DC and also DC to AC using a PMW for reactive and active power flow? Perhaps also frequency and power factor control
Dear George. Do you have an account on linkedIn? What's the account name? Can I connect with you?
www.linkedin.com/in/georg-schett-online-circuit-simulator/
Sa cz