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The accurate representation of the transmission line parameters is essential for several monitoring and control applications accommodated in the control center of the power system. In this sense, it is always important to update the database of the transmission line parameters which might be obsolete and/or contain erroneous parameters. The validation and the correction of any inconsistencies related...
The accurate knowledge of the transmission line parameters can be beneficial for several monitoring and control applications accommodated in the power system control center. Actually transmission line parameters are stored in the control center databases (assuming that they are time invariant); however, the databases might be obsolete and contain erroneous parameters. This paper proposes a methodology...
Over the past decades, many synchrophasor applications have been developed but the performance under various PMU errors has not been explored and is unknown for most applications. This paper discusses the impact of PMU measurement errors and limitations originated from hardware implementation of various phasor estimation algorithms on the accuracy of the synchrophasor-based fault location application,...
Transmission line parameters are affected by several factors, such as ambient temperature, mutual coupling of parallel lines, and erroneous transmission line length. Further, the several joints, especially at the line ends, cause additional changes in the calculated line parameters. These factors are rarely taken into consideration resulting to obsolete line parameter databases. The error that is...
In the paper the proposed algorithm for estimation of transmission line parameters is tested and evaluated. The proposed algorithm uses the weighted least square method with multiple scans of measurements derived from Phasor Measurement Units (PMUs). The network topology and loading conditions in the transmission network change continuously, which can influence the estimation of transmission line...
State estimation is one of the most important network management functions, responsible for determining the actual state of the power network based on the network model, available telemetry (analog measurements and digital device statuses) and pseudo measurements. Phasor measurement units (PMUs) provide valuable instantaneous information regarding power system stability and security, and thus have...
This paper presents a fault location algorithm for single phase to ground faults on three terminal transmission lines. The conventional fault location methods, using one-terminal ac voltage and current are not applicable to the multi-terminal systems. So, the indication of the faulted section and fault distance estimation is performed by using three-phase current and voltage of the terminal at which...
The paper is devoted to the identification of transmission lines from synchronized measurements of current and voltage phasors provided by the phasor measurement units (PMUs). The series and shunt line parameters are recursively estimated using the extended Kalman filter (EKF). Actual line temperature and reference resistance are estimated instead of actual series resistance, which is then computed...
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