tailieunhanh - Wind Power Impact on Power System Dynamic Part 12

Tham khảo tài liệu 'wind power impact on power system dynamic part 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 368 Wind Power Similarly row-matrix A 1 is constructed from Ag by leaving unchanged the first even by counting non-zero element of aS 1 and by letting the other elements be zero-valued. Thus the state scale of the tree becomes the following Aj1 A 1 A 1 . For example let us assume the edges 1 4 and 5 to be conducting. In this case Ag1 1 0 0 1 1 A 1 0 0 0 o A o 0 0 1 o aJ1 1 0 0 1 o . In order to construct block C 1 in block-matrix C corresponding to B-element B1 it is necessary to perform the following operations. State scale A 1 is subtracted from the odd rows except the last one of the unity matrix of the appropriate size whereas state scale A is subtracted from the even rows of the unity matrix. State scale AT1 should then be added to the last row of the obtained matrix. As result r0 0 0 0 0 0 1 0 -1 0 cB2 -1 0 1 0 0 0 0 0 0 0 _1 0 0 1 1 By rearranging the rows matrix C can be presented by two blocks . both by matrix CL for independent directed cycles containing only conducting edges of the graph and by matrix C 0 for independent directed cycles containing at least one non-conducting edge . Matrices C L and C 0 contain the rows of matrix C with the numbers corresponding to the numbers of the elements valued to 1 in state scales AL and AO respectively. State scales A 1 and At2 corresponding to the closed circuits in the graphs of B 1 and B2 are formed according to the following algorithms A 1 A 1 - A 1 and aL Ag2 - A f . State scale AL corresponding to the closed circuits in the graph of the AC DC AC converter is formed as Al AL1 A a where aL1 and A 2 are state scales of B-elements B1 and B2 respectively and aL is the state scale of the graph edge 1 X here A X 1 since this edge is always conducting. State scale A O corresponding to the open circuits in the graph of the AC DC AC converter is formed according to logic expression AOi 1 if Au 0 0 if Alì 1 where i is the number of a state scale element i 1 2 . 13 . According to the second Kirchoff s law Cl Co V 0 13

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