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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, and compares the effect of series and shunt reactive power compensation via UPFC from distance relay point of view. The presence of UPFC on a transmission line greatly influences the measured impedance at...
This paper presents a modified distance protection scheme in the presence of Unified Power Flow Controller (UPFC), one of the Flexible Alternating Current Transmission System (FACTS) devices. The presence of UPFC on a transmission line has a great influence on the measured impedance at the relaying point. The measured impedance itself depends on the power system structural conditions, pre-fault loading,...
This paper presents an adaptive distance protection scheme in the presence of Unified Power Flow Controller (UPFC), one of the Flexible Alternating Current Transmission System (FACTS) devices. The presence of UPFC on a transmission line has a great influence on the measured impedance at the relaying point. The measured impedance itself depends on the power system structural conditions, pre-fault loading,...
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 discusses the distance relay ideal tripping characteristic in the presence of unified power flow controller (UPFC), one of flexible alternating current transmission system (FACTS) devices on the next line and pays especial attention to the distance relay over-reaching problem. This is done by presenting the measured impedance at the relaying point in the presence of UPFC at the near end...
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, which is equipped with a superconductor magnetic energy storage (SMES) system. The presence of SMES equipped UPFC on a transmission line greatly influences the measured impedance at the relaying point. The...
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, which is equipped with a Superconductor Magnetic Energy Storage (SMES) system, in the case of inter, phase to phase and three phase, faults. The presence of SMES equipped UPFC on a transmission line greatly...
This paper presents the effects of unified power flow controller (UPFC), one of 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, the line structural conditions,...
This paper discusses the distance relay over-reaching in the presence of Unified Power Flow Controller (UPFC), one of Flexible Alternating Current Transmission System (FACTS) devices, on the far end of the second circuit of a double circuit transmission line. This is done by presenting the measured impedance at the relaying point and the ideal tripping characteristic. The measured impedance at relaying...
Distance relays are widely used as main and back-up protection for transmission lines. Their operation is based on impedance measurement at the relaying point, which can be affected by several factors, including pre-fault line loading and short circuit levels at the line ends. The problem of growing loads and limited paths for new transmission lines, has been somehow overcome by introduction of flexible...
This paper presents the measured impedance at the relaying point in the presence of a flexible alternating current transmission system (FACTS) device, i.e. unified power flow controller (UPFC). The presence of UPFC on a transmission line has a great influence on the tripping characteristic of distance relays. Distance relay tripping characteristic itself depends on the power system structural conditions...
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