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This paper presents an improved secondary voltage control (SVC) methodology incorporating compressive sensing (CS) for a multiarea power system. SVC minimizes the voltage deviation of the load buses while CS deals with the problem of the limited bandwidth capacity of the communication channel by reducing the size of massive data output from the phasor measurement unit (PMU) based monitoring system. The proposed strategy further incorporates the application of a morphological median filter (MMF) to reduce noise from the output of the PMUs. To keep the control area secure and protected locally, mathematical singular entropy (MSE) based fault identification approach is utilized for fast discovery of faults in the control area. Simulation results with 27-bus and 486-bus power systems show that CS can reduce the data size up to 1/10th while the MSE-based fault identification technique can accurately distinguish between fault and steady-state conditions.

Compressive Sensing and Morphology Singular Entropy-Based Real-Time Secondary Voltage Control of Multiarea Power Systems