PROJECT TITLE :
A Novel Method for Fault Location of Transmission Lines by Wide-Area Voltage Measurements Considering Measurement Errors
Sensible transmission grids are supposed to utilize varied measurements for enhanced operation. In specific, synchronized phasor measurements have found several applications during this context. This paper presents a linear weighted least-squares (WLS) methodology for fault location estimation of transmission lines by synchronized voltage measurements. The measurements could be taken from the faulted line terminals or buses far from the faulted line. The circuit equations of the network are used to search out the transfer function between the fault location and every voltage measurement. Next, 2 auxiliary variables are defined to remodel the nonlinear fault location estimation drawback into a linear WLS problem. A closed-type resolution is then obtained for fault location. The utilization of multiple measurements provides the chance of identifying erroneous measurements by a statistical test. The linearity of the matter expedites both estimation and identification procedures. Moreover, the tactic requires neither to classify the fault sort nor to estimate the fault resistance. Furthermore, transmission lines are modeled by distributed parameters thus that the strategy can be applicable to long lines. Electromagnetic transient simulations for 9-bus and 22-bus test systems reveal accurate fault location estimation, irrespective of fault kind and resistance, in addition to successful identification of measurement errors.
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