How to model a High Impedance Fault model with Matlab simulink?
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From: Nicholas A on 8 Dec 2009 04:25 Hi, I am trying to create a fault in a 25kv distribution system. I am putting the model in Part B to the distribution system just like what is shown in Part A. The HIF model in Part B consists of a nonlinear resistor, two diodes, and two dc sources that change amplitudes randomly every half cycle. Thus, some dynamics and randomness are represented. The problem I am facing now is clearly shown here. http://i45.tinypic.com/28vubf4.jpg Hope you can give some advise and guide me out. Thank you "Frank W." <yohansan(a)web.de> wrote in message <hfl43h$d18$1(a)fred.mathworks.com>... > > hi.. > >> Is there any other way to model similar HIF model in Matlab? i created the exact >> diagram but matlab do not recognize it. Can anyone show me any example for it? > >> thanks > > Hello, > but so far you haven't been telling anything about what elements in what toolbox you have been using. Another question is: if you only want to model part b) from the jpeg-picture what other components do you use? > How exactly does Matlab express its lack in recognition, i..e. what error messages do you get? > But generally this is true: >Beyond that, there's nothing that's not included in SimPowerSystem<. And almost nothing left that can't be modeled. > Regards > Frank
From: Frank W. on 8 Dec 2009 13:32 Hi, according to the small red crosses in >http://i45.tinypic.com/28vubf4.jpg< I guess that you want to connect elements from Simscape (all the elements that represent the fault) to elements from SimPowerSystem (all other elements). This is not possible that easily. I recommend only taking elements from SimPowerSystem. It might be possible to connect the elements from both toolboxes by using the blocks 'PS-Simulink Converter' or 'Simulink-PS Converter' from the 'Utilities' section of Simscape. Because I do not know Simscape this is only a guess after having a look at the online documentation. Regards Frank
From: Arnaud Miege on 8 Dec 2009 17:07 "Frank W." <yohansan(a)web.de> wrote in message news:hfm63i$ioc$1(a)fred.mathworks.com... > Hi, > according to the small red crosses in >http://i45.tinypic.com/28vubf4.jpg< > I guess that you want to connect elements from Simscape (all the elements > that represent the fault) to elements from SimPowerSystem (all other > elements). This is not possible that easily. I recommend only taking > elements from SimPowerSystem. > It might be possible to connect the elements from both toolboxes by using > the blocks 'PS-Simulink Converter' or 'Simulink-PS Converter' from the > 'Utilities' section of Simscape. Because I do not know Simscape this is > only a guess after having a look at the online documentation. > Regards > Frank > Yes, you can't connect Simscape elements to SimPowerSystems elements. However, in your case, all the components you have modelled using Simscape are readily available in SimPowerSystems, so I would just use the SimPowerSystems version. HTH, Arnaud
From: Nicholas A on 8 Dec 2009 17:25
Thank you Arnaud and Frank I now understand clearly where is my mistake already. I shouldn't mix the Simscape component with the SimPowerSystem. Both of your help is highly appreciated. Thanks a million. Regards, Nicholas "Arnaud Miege" <arnaud.miege(a)nospam.mathworks.co.uk> wrote in message <hfminu$hk3$1(a)fred.mathworks.com>... > > "Frank W." <yohansan(a)web.de> wrote in message > news:hfm63i$ioc$1(a)fred.mathworks.com... > > Hi, > > according to the small red crosses in >http://i45.tinypic.com/28vubf4.jpg< > > I guess that you want to connect elements from Simscape (all the elements > > that represent the fault) to elements from SimPowerSystem (all other > > elements). This is not possible that easily. I recommend only taking > > elements from SimPowerSystem. > > It might be possible to connect the elements from both toolboxes by using > > the blocks 'PS-Simulink Converter' or 'Simulink-PS Converter' from the > > 'Utilities' section of Simscape. Because I do not know Simscape this is > > only a guess after having a look at the online documentation. > > Regards > > Frank > > > > Yes, you can't connect Simscape elements to SimPowerSystems elements. > However, in your case, all the components you have modelled using Simscape > are readily available in SimPowerSystems, so I would just use the > SimPowerSystems version. > > HTH, > > Arnaud > |