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Power system restructuring includes several new aspects in power system, especially in the area of transmission line protection. Therefore, in this paper transmission line protection (TLP) using distance relay and modelling of distance relay with analog antialiasing filter for TLP is presented, on the basis of several points of operational aspects, throughout the last decade. Protection system of...
Distance relay offers protection of transmission line over a range of distance. Settings of a distance relay can be improved by obtaining information about fault resistance of the transmission line. Accurate estimation of fault resistance helps in efficient operation of the relay in the transmission line. Fault resistance can be estimated by analyzing the fault files at the substations. COMTRADE fault...
Distance relay scheme is widely used for the protection of transmission lines. It has many characteristics such as Impedance, Reactance, MHO and Quadrilateral characteristics. Quadrilateral characteristics provide better protection for Transmission line as compared to other characteristics. This paper presents the development of quadrilateral and elliptical relay characteristics in Numerical Relay...
This paper presents a real study of working with modern distance protection of a transmission line, by analyzing and simulating it in a specialized software. We will present all possible defects, and will also highlight the need for protection of remotely controlled transmission and distribution lines for electricity.
This paper discusses the distance relay over-reaching due the presence of Thyristor Controlled Series Compensator (TCSC), one of the series connected Flexible Alternating Current Transmission System (FACTS) devices, considering its MOV operation. This is done by presenting the measured impedance at the relaying point in the presence of TCSC at the near end of the next line. The measured impedance...
This paper presents an adaptive distance relaying algorithm (ADRA) for transmission line protection. In ADRA, a fault detector designed based on mathematical morphology (MM) is used to determine the occurrence of a fault. The Euclidean norm of the detector output is then calculated for fault phase selection and fault type classification. With respect to a specific type of fault scenario, an instantaneous...
An experimental evaluation of a power differential relay is conducted and the results are described. The experimental setup consists of a generator connected to the network via a transmission line protected by the power deferential relay. The relay input signals, fundamental active and reactive powers, are locally computed from the complex product of the current and voltage phasors at each end on...
A transmission line differential relaying scheme based on Discrete Wavelet Transform (DWT) is presented in this paper. Comparison of the transient energy in the current signals at both ends of the transmission line is introduced. The transient energy in the current signals is extracted using DWT. A sliding data window with a length equivalent to half cycle of the fundamental power frequency is used...
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