pdci tnob derate day ahead market ran branch group pdci tnob ttc n direction changed 2875 mw 1956 mw 0700 1200 operating day 7 26 01 reason change celilo converter 1 dc harmonic filters service first applicable hour ahead market run values 0000 iso update changes line rating status sent market operations inquiries please call hour ahead desk system conditions described communication dynamic subject change iso attempted reflect current accurate information available preparing notice system conditions may change suddenly little notice