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Stability

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الدر المكنون الدر المكنون
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33 views3 pages

Stability

Uploaded by

الدر المكنون الدر المكنون
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Stability Pon aeons Saree “Pek ore Fon example 3 AMPLE 512 AOE I a noe cd oF 3 a cing ange ing te wie ie ge genera ele instant preceding the ® ca, 5, cB 2125 02s ‘solution iret ay shown inthe Hire elow wher a oneal ‘2 line near circuit breaker CBy aad CO Tp qumitis ar on te common MVA- Y taste actheto Xr = 0.25 +05 + 0.06 = 0.81 = ISD gg = 1588s Dat 05405 5 996 = my aaas+ S205 «006 = 036 nd, -tnt-tasewh (EI sing = '25*M ing = 2255s > (Sax ~ 50) =~ Prue? £0859 + Prue 3 ©O8S y= Nang = MG Pand = 225050 cond, = 180 3 Pree = max 2 f x 2128 eas Ler ps0 2 _ LOI39.6= 2662); 95~ 0+ 1583 cosh39.6° 1.54320 =0.51640 wold 5 = 589° r © ‘atin exaneru $19. A220 MVA, 4 and 60 Hz syaehronan machine caranred i tnt bs through aneformer and double circuit transmission fine as shown inte allowing figure. The infinite bus voltage F = 1.) ‘The rcet aie tonienteatance of the machine i 0.30 pa the transformer ‘eaetanceis 020 pu andthe eactanc ofeach ansision ine is 0.3 pall to "Tas of he rating ofthe syetronae machine. al the machine is delivering ‘08 pa eal power and reactive power i 0074 pu. with a terminal voltage of 1.0 pu The inertia constant = 3 MUDMVA, Al resistances ae neglected. en: lst to voli Y= 19 pu ‘eminlvlage gil aes poet L092 PnP 08 (caret Gowig int he iii bi “he transfer reactance be =e he intra voltage ad ihe fete bs ere hase ofthe ing ofthe syetonous mace ay ae ‘08 pa eal power nd eave power i 0074 pu with a terminal voltage of 1.0 pa Theneria constant = 5 MJIMVA. Al esistances are neglected, ‘he transfer reactance betwen he neal voliage aad the infil bt hfe (@ A temporary three-phase fault occurs at the sending end of one a SEAN NT eee critical clearing angle and the fault clearing re 03s024 a (ii) A three-phase fault occurs at the Ser a mide of one ofthe lines, fault ig ei eee nd eatin ae + aid ade fasion ayes See Demented cng ee gun tn acre atone 0 nt ne tg eo nf eg nce ORE +6 yn 03 402022223 00s - Daring hel condon: Py = 0 ‘Pott condition Siace bos he ines ae intact when the Gal's cleared therefore the power angle equation of pref and postal ae the samme. ‘enw = LITEM ing = 1.8sind 1, 8 Os The inital power angle & is ealulted 2 yg = Pg = 08 = Pag Sind esie'( 2S) oseam oust ‘The critical clearing time .- and 2x5(LA8 — 0.46055) axooxog 7768 lb 5088) + Pay mtd cond * Frnt Pai sassei2- 26389 5, or seas aie 3-3 alte s.2uns @ ® i) Thrcesphase fault cccurs at the mid of on ofthe lines Pref onion Frome race pen a axes ax 030024(92203) e048 ty ty

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