Efficient optimization algorithms for constrained power economic dispatch /
Efficient optimization algorithms are developed to solve
| Main Author: | |
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| Format: | Thesis Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=742145571&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | Efficient optimization algorithms are developed to solve constrained power economic dispatch problems. A simple two- stage optimization algorithm is proposed and investigated for fast computation of constrained power economic dispatch con trol problems. The method is a simple demonstration of the hierarchical aggregation/disaggregation(HAD) concept. The HAD concept utilizes the network hierarchy to speed up the computation. The algorithm first solves an aggregated problem to obtain an initial solution. This aggregated problem turns out to be the classical economic dispatch formulation, and it can be solved in 1% of overall computation time. In the second stage, linear programming is used to find the optimal solution which satisfies power balance constraints, generation and transmission inequality constraints and security constraints. Implementation of the algorithm for the IEEE systems and the EPRI Scenario systems shows that the two stage method achieves an average speedup ratio of 10.64 over the classical LP-based method. For real time OPF of larger power system, a partially decoupled hierarchical aggregation/disaggregation (HAD) OPF algorithm has been evolved from our simple two-stage OPF algorithm. The effects of the new partially decoupled real power OPF are investigated, and the intuition that the approach is accurate is explained by using a simple example. The partially decoupled OPF approach developed here can be very efficient for real time OPF of larger power systems under normal operating conditions. In the first stage, we solve the aggregated problem as the economic dispatch problem. The second stage solves a classical economic dispatch problem involving the transmission losses, in which the decoupled transposed Jacobian method calculates the penalty factors and incremental transmission losses. At the third stage, the transmission capacity and the other violations are checked and corrected. A partially decoupled real power LP method, in which a coupled load flow is used, refines the third stage solution iteratively involving all detailed constraints. Test results show that the partially decoupled HAD OPF method has acceptable accuracy, and efficiently speeds up the computation process. A distributed textured algorithm has been extended from the parallel textured algorithm for the constrained economic dispatch control problem of large power systems. In this document, we developed the distributed communication models, discussed their impacts on algorithm analysis, and then provided some examples to illustrate the convergence properties of distributed textured algorithms. |
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| Item Description: | Vita. "Major Subject: Electrical Engineering". |
| Physical Description: | xi, 136 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references. |