transformer differential operation

er.satish
er.satish
@ersatish-qMIyMx • Oct 26, 2024

hello,

please give me possible reasons for 'transformer differential operation' in power plant as it trips the plant.

i'm working in 12 mw power plant.

thanks

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  • aj_onduty
    aj_onduty

    @aj-onduty-BvuwMK • Nov 10, 2010

    Dear er.satish,

    Thank you for posting.

    Please be a bit more specific about the situation.. I personally think the question is incomplete.

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  • aj_onduty
    aj_onduty

    @aj-onduty-BvuwMK • Nov 10, 2010

    If the transformer is showing differential problems at start up or before reaching full capacity, the reason may be some problem with the harmonic restrain settings of the differential relay. Kindly contact the vendor. The problem is in the settings. Few may suggest to increase the delay time. Don''t do it. That may be correct for a short term, but that may affect a lot of other things in the long run.

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  • aj_onduty
    aj_onduty

    @aj-onduty-BvuwMK • Nov 10, 2010

    The other point to be considered is that the input may have a lot of harmonics. So, please check the graphs you can find and look for generator side harmonics. Check if all the other relays are working perfectly.

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  • vijay pandit
    vijay pandit

    @vijay-pandit-08e86s • Jan 15, 2011

    do you know how to make a simulink model on difeerentail protection of transformer on matlab?
    please if know then tell me i need it.
    thanks in advance....

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