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This paper proposed a new algorithm to perform the online determination of the low frequency oscillation modes in large interconnected power system. First, the generator's active power and its speed deviation were represented in the form of generalized phasor and the relationship between their phase angles was deduced. Then a simple system was constructed to illustrate the correspondence between the...
Series compensated power system may lead to a very unusual problem known as Subsynchronous Resonance (SSR). Flexible AC Transmission Systems (FACTS) controllers are widely applied to mitigate subsynchronous oscillations. The Static Synchronous Compensator (STATCOM) is a shunt device of the FACTS family using power electronics to control power flow and improve transient stability on power grids. With...
Controlled islanding of a large electric power system is proposed under rare circumstances as a measure of last resort to avoid a catastrophic blackout. Controlled islanding appears to be more desirable than uncontrolled islanding. A separate power system operating objective is the retention of synchronous operation of the entire system to ensure the viability of power markets. The problem of when...
Centralized control using system-wide data has been suggested to enhance the dynamic performance of large interconnected power system. However, the impact of time delays in acquisition and transmission of key signals cannot be ignored. A novel direct method (DM) based on cluster treatment of characteristic roots (CTCR) is introduced in this paper to analyze the stability of a power system considering...
Modern power systems are prone to widespread failures. With the increase in power demand, operation and planning of large interconnected power system are becoming more and more complex, so power system will become less secure. Operating environment, conventional planning and operating methods can leave power system exposed to instabilities. Voltage instability is one of the phenomena which have result...
Summary form only given. Electric utility industry has undergone extensive restructuring during the last 10-15 years not only in the United States but throughout the World. This restructuring is mainly focused on promoting competition in the generation market. The transmission systems that were originally built for serving the native loads and interconnecting generation are now open to all users....
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