Increasing the Reliability of Seaport Equipment by Estimating Transmission Line Parameters by Phasor Measurement Equipment and Data Acquisition and Control System
Given the importance of the equipment used in seaports and the development of the Global Positioning System, there is a potential for better performance in estimating line parameters. The presence of phasor measuring equipment is essential for line parameter estimation algorithms, which will increase system reliability. Today, a small number of phasors measuring equipment’s are installed in the power system and the information at both ends of a line, one through the same equipment and the other through the control and data acquisition system.In this paper, the proposed solution is first applied to a simple two-terminal transmission line and then extended to a three-terminal system. The simulation results in PSCAD software confirm the validity and correctness of the proposed method for today's power systems. The results showed that the proposed method is able to calculate the real-time parameters of the system with the appropriate accuracy for the purposes of network studies. In this research, for calculating the positive (negative) sequence parameters of the line based on the phase measurements of voltage and current at both ends of the line, it is presented. For this purpose, phase and current information of voltage and current at the beginning and end of the transmission line, resulting from multiple measurements of these parameters are used and then based on the Newton-Raphson method to select the best estimate, the transmission line parameters are determined.The obtained results show a very good correlation between the parameters obtained from the measured data and the parameters calculated by the computational software.
PMU , SCADA , terminal , Transmission line
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