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In this letter, an improved real-time, short-term voltage stability monitoring method is introduced. The impact of voltage magnitude oscillation on the calculation of the Lyapunov exponent is analyzed, and a phase rectification method to eliminate the negative influence of oscillation is proposed. The simulation work was conducted on the provincial power grid at Guangdong in China. Based on our simulation...
This paper firstly reviews the recent development in power system protection, with special attention paid to the wide-area and integrated protection, in order to look into future development of protection and control system for smart grids. The paper then mainly reports on the design of a novel architecture for the integration of protection and control for wide area power network. The concept of integrated...
Failure rate is a basic parameter in the outage model of the component in power systems. A novel aging failure rate evaluation method based on evidence theory is proposed. Transformer is taken as an example to illustrate the proposed method, because the transformers have been widely used online condition monitors. The operational states of a transformer can be classified into four degrees according...
This paper implements recursive least square method with variable forgetting factors (VFFRLS) in local real-time voltage stability monitoring scheme based on the application of Thevenin equivalent model and PMU to reform the existing methods which present weak performance in tracking the time-varying parameters of equivalent model for power system. The selections of variable forgetting factor and...
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