An improved power flow for an ill-conditioned power system with FACTS devices
| Autor: | Tohru Takeuchi, Naoto Yorino, Hiroaki Sugihara, Hiroshi Sasaki |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Engineering
Series (mathematics) business.industry Energy Engineering and Power Technology Transmission system Power (physics) symbols.namesake Electric power system Control theory Jacobian matrix and determinant Convergence (routing) symbols Penalty method Electrical and Electronic Engineering business Condition number |
| Zdroj: | Electrical Engineering in Japan. 140:30-37 |
| ISSN: | 1520-6416 0424-7760 |
| DOI: | 10.1002/eej.10027 |
| Popis: | This paper addresses the issue of the computation techniques for assessing the steady-state power flows controlled by Flexible AC Transmission Systems (FACTS), which contain variable series compensators (VSC), phase shifters (PS), interphase power controllers (IPC), and unified power flow controllers (UPFC). An improved Newton–Raphson load flow program has been developed based on an analysis of the convergence characteristic of the conventional method. It is shown that the conventional method tends to suffer from ill-conditioning problem, resulting in shrinkage of the convergence region. Based on examinations of the condition number of the Jacobian, a penalty function method is adopted in order to avoid the ill-conditioning problem and to guarantee a successful convergence. Although the computational burden is increased about 2 to 3 times, the proposed method considerably extends the region of convergence. The effectiveness of the proposed method is demonstrated through numerical examinations using IEEE 57 and 118 bus systems. © 2002 Wiley Periodicals, Inc. Electr Eng Jpn, 140(1): 30–37, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10027 |
| Databáze: | OpenAIRE |
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