Relaxed Linear Programming Based Optimal Power Flow
| Autor: | Nan-Hsun Chiu, 邱南勳 |
|---|---|
| Rok vydání: | 2007 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 95 In recent years there has been a tendency toward liberalization of power industry, because advanced countries have lifted their ban on the power market. This, following the market’s fluctuation, has led to uncertain factors (such as load forecast, output of generating units) that were taken into account in the previous power system safety analysis. For this reason, independent system operators in various countries have an urgent need for real-time simulation analysis software featuring system safety and economic operation. OPF, one of the major analysis simulation tools, can be used to address relevant issues such as system’s real power/reactive power dispatch, voltage control, congestion management of transmission lines, fuel cost assessment, exhaust emissions. As a large power system includes many integer variables like transformer taps, reactive power equipment, etc., the OPF solving speed is relatively low. In this article, we try to set up an OPF algorithm based on linear programming relaxation and sensitivity analysis, aiming to cut OPF operation time. Principally, the article contributes to: 1. Developing an OPF algorithm to cut operation time. 2. Finding the same global optimum from any initial point. 3. Deriving the optimal parallel mode for the capacitor by using the sensitivity analysis theory. 4. The objective function in the mode can be modified according to the requirements of system operation or system planning. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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