발간년도 : [2022]
| 논문정보 |
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| 논문명(한글) |
[Vol.17, No.5] Development of Large-Scale Power System Restoration Guidance System Based on Expert System |
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| 논문투고자 |
Won-Keun Yu |
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| 논문내용 |
In recent years, unexpected blackouts frequently occur in many countries, causing enormous socio-economic losses. When a blackout occurs in a large-scale power system, it is very important to provide fast and stable restoration operation while preventing chain blackouts in the power system. If a circuit breaker re-trips due to overvoltage or overload during the restoration process, restoration time can be significantly delayed, so analytical verification is often required. Therefore, there is a need for a restoration guidance system that can support the judgment of the system operator in the long-term restoration process. Some countries have already developed restoration guidance systems and applied them to transmission systems or substation-distribution systems. In Korea, basic research on the distribution system and 154kV substation has been done so far, but basic research on the transmission system has not been done yet. Recently, several blackout accidents have occurred in the power system in Korea, raising the need for a power system restoration guidance system. In this paper, an expert system-based restoration guidance system is proposed. The proposed system is composed of a topology processing system that can check the blackout section, and an expert system that suggests a restoration path according to the developed rules. In order to apply to a large-scale power system with a complex structure, a test bed system with an loop structure was used in the case study. As a result of the case study, the proposed system suggested a restoration path that does not cause overvoltage or overload during the restoration process. |
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