Identification of Coherent Generators Using Fuzzy C-Means ...

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Fig. (8) The speed of generator No. 1 in the low order model and in the high order modelTable (7) The effect of Changing the inertia constant on 14-Bus systemCoherentGeneratorsParameters of the equivalent machineM eq(pu)K deq (pu)P meq(pu)X d’(pu)Decreasing by80%G 2 , G 4 and G 5 0.5712 0.4495 -10.0741 0.5629Decreasing by66.7%G 2 , G 4 and G 5 0.9520 0.4495 -10.0741 0.5629Base Case G 2 , G 4 and G 5 2.8559 0.4495 -10.0741 0.5629Increasing by200%G 2 , G 4 and G 5 8.5678 0.4495 -10.0741 0.5629Increasing by400%G 2 , G 4 and G 5 14.2797 0.4495 -10.0741 0.562914Fig. (9) The effect of changing the machines inertia constants on the speed ofgenerator No. 4
Table (8) The effect of Changing the damping coefficient on 14-Bus systemDecreasing by80%Decreasing by66.7%CoherentGeneratorsM eq(pu)Parameters of equivalent machineK deq(pu)P meq(pu)X d’(pu)G 2 , G 4 and G 5 2.8559 0.0899 -10.0741 0.5629G 2 , G 4 and G 5 2.8559 0.1498 -10.0741 0.5629Base Case G 2 , G 4 and G 5 2.8559 0.4495 -10.0741 0.5629Increasing by200%Increasing by400%G 1 , G 2 , G 4 andG 53.30769 1.92708 6.0267 0.4138G 1 , G 2 , G 4 andG 53.30769 3.21180 6.0267 0.4138The third term is the transient reactance’s of generators; Table (9) and Fig. (11) show theeffect of changing the machines transient reactance’s on the coherent generators. FromTable (9); one can derive that the change of the machines transient reactance's has a largeeffect on the coherent generators. Finally; the effect of loading conditions are studied. Thefirst technique is changing the load active power and assuming constant reactive power.Table (10) and Fig. (12) show the coherent generators at varying load active power. FromTable (10) one can derive that; by decreasing the load active power the coherent generatorsare changed from those obtained in the base case.Table (9) The effect of Changing the transient reactance on 14-Bus systemDecreasing by80%Decreasing by66.7%CoherentGeneratorsM eq(pu)Parameters of equivalent machineK deq (pu)P meq(pu)X d’(pu)G 1 , G 2 , G 4 andG 53.307693 0.64236 6.9267 0.0828G 1 , G 2 , G 4 andG 53.307693 0.64236 6.0267 0.1379Base Case G 2 , G 4 and G 5 2.8559 0.4495 -10.0741 0.5629Increasing by200%G 4 and G 5 0.6325 0.1250 -3.8066 1.4917Increasing by400%G 4 and G 5 0.6325 0.1250 -5.0983 2.486215
Page 1 and 2: Mahdi M. M. El-ariniAhmed FathyJ. E
Page 3 and 4: Fig. (1) Partition of the studied P
Page 5 and 6: ⎡ 1⎤⎢⎥⎡Δδ ⎤1⎡ 1⎤
Page 7 and 8: 4. Proposed TechniqueIn this sectio
Page 9 and 10: Input the coherencymeasure C ij tol
Page 11 and 12: Rankingof S 1Table (1) the ascendin
Page 13: parameters of the equivalent machin
Page 17 and 18: The second technique is changing th

Identification of Coherent Generators Using Fuzzy C-Means ...

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