The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents the measured impedance at the relaying point in the presence of unified power flow controller (UPFC), one of flexible alternating current transmission system (FACTS) devices, on a double circuit transmission line. The presence of UPFC on a line has a great influence on the measured impedance at the relaying point. The measured impedance itself depends on the power system structural...
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...
This paper presents the measured impedance by a distance relay in the presence of thyristor controlled series compensator (TCSC), one of the series connected FACTS devices, on a transmission line, considering its metal oxide varistor (MOV) operation, in the case of inter, phase to phase and three phase, faults. The measured impedance at the relaying point is affected by the power system structural...
Distance relays are widely in use as main and back-up protective devices for transmission lines. Their operation is based on impedance measurement at the relaying point, which can be affected by several factors. Continued demand for electricity energy leads to increase in the short circuit levels along the network, which itself causes new problems. One of the proposed solutions for this problem is...
This paper investigates the measured impedance by a distance relay considering the transmission line capacitance by utilizing a pi model for the line. The distance relay ideal tripping characteristic is presented. The measured impedance and the tripping characteristic are compared with those of in the case of neglecting the line capacitance. In the case of zero fault resistance, especial attention...
This paper discusses the distance relay mal-operation in the case of installation of thyristor controlled series compensator (TCSC), one of the series connected flexible alternating current transmission system (FACTS) device, on the second circuit of a double circuit transmission line, considering its metal oxide varistor (MOV) operation. This is done by means of presenting the measured impedance...
This paper discusses the distance relay mal-operation in the presence of static synchronous series compensator (SSSC), one of the series connected Flexible Alternating Current Transmission System (FACTS) device. This is done by presenting the measured impedance at the relaying point in the case of SSSC presence at the near end of the line behind. Measured impedance by distance relay is greatly influenced...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.