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Protection model like pscad delay and mono-stable writing

asked 2020-01-30 00:08:01 -0500

Gloria.Z gravatar image

Hi everyone, now I want to develop a hvdc protection system, however I don't know how to write the model Delay and Mono-stable in PSCAD, can anyone help me? how to get the time ,when the input of delay is 1(high),and then output 1 for during time? Timed ON/OFF Logic Transition "Delay" and "Monostable Multivibrator"

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answered 2020-01-30 02:11:48 -0500

jfconroy gravatar image

I see no reason why this can't be implemented in a user-defined model in PSS/E with Fortran code. It can also be done in PSCAD, but please remember that this is a PSS/E forum!

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@jfcontoy Thank you for your reply. I tried to implement it in pss/e, but I don't know how to get the time, when the input of Delay become 1. Can you give me your emai, I will email you the figure and code, for you to help me ?OK?

Gloria.Z gravatar imageGloria.Z ( 2020-01-30 02:15:58 -0500 )edit

If you know that the time step will be fixed, and that the delay time will be fixed, then you can define a number of "buckets" to store the previous values of the variable in the simulation. As the simulation progresses, you update the buckets and retrieve the delayed value. PSCAD does this.

jfconroy gravatar imagejfconroy ( 2020-01-30 03:58:57 -0500 )edit

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Asked: 2020-01-30 00:08:01 -0500

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Last updated: Jan 30 '20