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Fast online dynamic voltage instability prediction and voltage stability classification
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Fast online dynamic voltage instability prediction and voltage stability classification
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Journal Article
Fast online dynamic voltage instability prediction and voltage stability classification
2014
Overview
In this study, a novel approach is proposed for fast prediction of dynamic voltage instability occurrence (as a short term phenomenon and/or a long term one) and voltage stability stiffness of the system, against load disturbances. The main contribution of this paper is in introducing a procedure for generating novel features to be applied to a pattern classifier, by which dynamic voltage stability status of a power system can be predicted. The proposed feature generation procedure only needs measured pre-disturbance variables and disturbance severity provided by phasor measurement units as inputs whereas a set of output variables are derived from an unconstrained power flow program. Since the proposed method does not need any measured post disturbance data, the prediction task can be performed just after the disturbance. Thus, corrective actions can be executed in a short time after the disturbance to inhibit voltage instability. Moreover as no measured post-disturbance data are needed, the proposed method can also be employed in preventive procedures for voltage stability enhancement and/or decreasing possibility of voltage instability occurrence. Training a decision tree based classifier with the proposed features and testing the method on a modified version of Nordic32 test system, the simulation results have demonstrated that the proposed method effectively predicts the status of dynamic voltage stability in the test system.
Publisher
The Institution of Engineering and Technology,Institution of Engineering and Technology,The Institution of Engineering & Technology
Subject
/ Disturbances. Regulation. Protection
/ Dynamics
/ Electrical engineering. Electrical power engineering
/ Electrical power engineering
/ Exact sciences and technology
/ fast online dynamic voltage instability prediction
/ Operation. Load control. Reliability
/ power system dynamic stability
/ Testing. Reliability. Quality control
/ Voltage
