ij - POWERLAB - Univerza v Mariboru
ij - POWERLAB - Univerza v Mariboru
ij - POWERLAB - Univerza v Mariboru
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Obratovanje elektroenergetskih omrež<strong>ij</strong> - stabilnost stran 287. VajaS pomočjo kriter<strong>ij</strong>a enakih površin ugotovite ali bo sistem na sliki po nenadnispremembi moči turbine s 50% na 110% ostal stabilen.j0.5Ge = 1.25e jδj0.23x T1x DV1x DV2j0.6j0.07x T2u ∝ = 1.0e j0Povezovalna reaktanca znašax ⋅ x0.5⋅0.6= + + = 0.23+ + 0.07 = 0.5727+ 0.5 + 0.6DV1 DV2xpxT1xT2xDV1xDV2Prenosna električna moč:peleu ⋅ 1.25⋅1.0= ⋅ sinδ = sinδ = 2.1825sinδx 0.5727Kot pred spremembo1pp = 0.5 = p = 2.1825sinδmehelδ = = o' ''13.2438 13 1437Kot po spremembip = 1.1 = p = 2.1825sinδmeh2elδ = =o ' ''30.2656 30 1556Največji dopustni kotδ°o ' ''3= 180 − δ2= 149.7344 = 149 44 412Površina A 1 je sorazmerna kinetični energ<strong>ij</strong>i, ki je rotor pospeševala.1δ∫2 2( P P ) ( )A = − dδ = 1.1− 2.1825sinδ dδ=δmehel1 1δδ( δ2 δ1) ( δ2 δ1)⎛( 30.2656 −13.2438)⋅π⎞= 1.1 − + 2.1825 cos − cos =∫° °( )= 1.1⋅ ⎜⎟+ 2.1825 cos30.2656 −cos13.2438⎝ 180 ⎠= 0.0874=