| 摘要 |
SUPER DECOUPLED LOADFLOW METODS The complete patent specification involves the invention of six super decoupled loadflow methods. The Fast Super Decoupled Loadflow (FSDL) method and two variants Transformed Fast Decoupled Loadflow (TFDLXB and TFDLBX) methods are known ones and included are their novel versions (NFSDL, NTFDLXB, NTFDLBX). These are the best versions of many simple variants with almost similar performance. These methods specifically involved the use of the following invented technics in the prior art method. 1. Gain matrices of all the six methods are different and they can be determined as described in the specification. Obviously the gain matrices of P.THETA.-subproblem can be defined unsymmetrical. 2. In all the six methods, rotation angles are restricted to the maximum value of -36 degrees from nonlinearity considerations. 3. Slack-start for any decoupled loadflow method for efficiency 4. Modification of real power mismatches at PV-nodes according to relations (12) and (15) of the specifications for the methods FSDL, TFDLXB, TFDLBX. 5. Computation of angle correction and updating for PV-nodes along with the voltage magnitude corrections at PQ-nodes for NFSDL, NTFDLXB and NTFDLBX methods. In the back-substitution part of the solution of this subproblem involving angle corrections at PV-nodes and voltage magnitude corrections at PQ-nodes, skip factor elements corresponding to rows and columns of PV-nodes in the calculation of voltage magnitude corrections. The specification deals only with unadjusted super decoupled loadflow solution methods and does not describe any applications. However the computer algorithms can be appropriately modified for adjustments and/or applications such as state estimation, contingency analysis etc. Also described and claimed is the invention of two compact storage schemes for gain matrices ofthe FSDL method and two efficient procedures for node type switching implementations in the FSDL method.
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