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Initializing CMLDBLU1

asked 2019-09-22 15:15:13 -0500

bikiran1991 gravatar image

I am trying to run a simulation with the CMLDBLU1. Just tried a no disturbance test with the CMLDBLU1 at only load bus. The values (voltage, angles, states) are not flat lines. Looking at the log file, the E'q and E''q params of all the 4 motor loads are appearing in the 'INITIAL CONDITIONS SUSPECT". Plotting these states, it is clear that something is going wrong during initialization. The CMLDBLU1 load MVA base was set at -1.

I suspect that somehow the load consumption of the CMLDBLU1 model is not consistent with the PL and QL values of the load in the raw file. I tried to figure this problem out myself and the parameters of CMLDBLU1 relevant to the load consumption could be: Load mva base, the motor loading factors. However, so far, i have not been able to fix this issue.

Anyone has any suggestion regarding this? What CMLDBLU1 parameters should i look at to make sure that the load data in the raw file is consistent with the CMLDBLU1 entry in the dyr file?

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Have you reduced the time step?

perolofl gravatar imageperolofl ( 2019-09-23 02:07:30 -0500 )edit

yes, it doesnt help

bikiran1991 gravatar imagebikiran1991 ( 2019-09-23 10:03:10 -0500 )edit

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answered 2019-09-22 20:11:25 -0500

jconto gravatar image

Use latest CMLD model v.2, CMLDBLU2, which is a cleaner version than v.1, recommended by PTI and NERC.

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working with psse v33, which doesnt have this model

bikiran1991 gravatar imagebikiran1991 ( 2019-09-23 10:06:07 -0500 )edit

I use v.33.12.1 (latest) and CMLDBLU2 is included (I think it is available after v. 33.10).

jconto gravatar imagejconto ( 2019-09-24 13:19:53 -0500 )edit

I have v33.3. Tried using CMLDBLU2, for some reason doesnt work.

bikiran1991 gravatar imagebikiran1991 ( 2019-09-24 17:05:10 -0500 )edit

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Asked: 2019-09-22 15:15:13 -0500

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Last updated: Sep 22 '19