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answered Mar 16 '1

perolofl gravatar image

It seems strange to disconnect generators in order to fix the mismatch problem. Have you tested to lock the reactive power generation instead, i.e. set Qmax=Qmin for the concerned generators instead?

Make sure that the Qmax - Qmin difference is larger than 0.002 pu for all generators with unequal Q-limits. This is 0.2 Mvar for a saved case with 100 MVA system base. Generators with a smaller difference should be locked by setting both Q limits to (Qmax + Qmin)/2. These updates shall be done in the base case, before performing N-1 analysis.