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Fast and accurate fault location is critical to restoration of the power system. Deployment of production grade Phasor Measurement Unit (PMU) based on the latest IEEE C37.118.1 measurement standards using high-speed “P Class” data makes accurate fault location possible. Multi-terminal PMU data and decentralized PDC storage can easily be leveraged to not only obtain affordable and accurate fault location...
A new fault location method for untransposed transmission lines with multiple derivations is presented in this article. It is based on pre-fault and post-fault voltage and current phasors, measured on steady-state at local and remote terminals, to determine the fault information, such as: the section of occurrence, the distance, i.e. the point of occurrence, and the resistance.
This paper presents the effects of Static Var Compensator (SVC), one of the shunt connected Flexible Alternating Current Transmission System (FACTS) devices, on the measured impedance at the relaying point in the case of inter phase, phase to phase and three phase, faults. The measured impedance at the relaying point is affected by several factors, including the line pre-fault loading, line structural...
This paper presents a general approach to locate any type of fault on either a single-circuit or a double-circuit transmission line when only current magnitude measurements are available. Emphasis is given to double-circuit line. The distinctive feature of the proposed fault location method is the current measurements employed can be from one or more branches, which are not restricted to those of...
This paper presents algorithms to locate faults on a double-circuit transmission line by utilizing sparse current measurements from one or two branches. The branch current is derived as an analytical function of the unknown fault location and fault resistance, and then the fault location can be obtained based on the measured branch currents. The zero-sequence mutual coupling between the two branches...
This paper is focused on the development of the new principles and operational algorithms of the transmission lines distance protection. The proposed distance protection algorithms utilize statistical information about the undefined and random parameters and quantities such as equivalent impedances of the systems at the unmonitored end of the power transmission line and current and voltage phasor...
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