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An ultra high voltage (UHV) ac and dc interconnection will become the foundation of China’s future smart grid. Due to the wide spread of interconnected regions, the distance between control stations will increase dramatically. Therefore, the communication system’s reliability and real-time performance will become increasingly crucial. However, failures of the communication system, such as interruptions,...
This paper presents a method to describe nonlinear oscillation of power system. Specifically, this paper uses the con trolling mode which is identified by the extended equal-area criterion (EEAC). The energy of center equal point (CEP) or far end point (FEP) in each swing is used to express the oscillation energy of the controlling mode, so the trend of swing energy variations can be used to show...
An efficient and robust case sorting algorithm based on Extended Equal Area Criterion (EEAC) is proposed in this paper for power system transient stability assessment (TSA). The time-varying degree of an equivalent image system can be deduced by comparing the analysis results of Static EEAC (SEEAC) and Dynamic EEAC (DEEAC), the former of which neglects all time-varying factors while the latter partially...
Reducing the computational burden of transient stability assessment (TSA) by filtering out most risk-free faults effectively and rapidly without any false-filtering will be significant especially for on-line and uncertainty TSA. This paper presents such a rapid and robust case screening algorithm based on Extended Equal Area Criterion (EEAC). The time-varying degree of an equivalent image system can...
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