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In recent years new FACTS devices based on voltage-source converters (VSCs) have been investigated. Unified interphase power controller (UIPC) is one of these novel FACTS controllers and the other one is VSC-based interphase power controller (VSC-based IPC).The purpose of this study is to investigate and compare the performance of distance relays on transmission lines in the presence of VSC-based...
The following topics are dealt with: microgrid system; power distribution system; smart power grid; power transmission planning; power cables; lightning arrester; FACTS devices; wind power plant; load flow; photovoltaic solar system; electric traction system; double feed induction generator; power generation control; hydroelectric power plants; relay protection; VSC HVDC station; genetic algorithm;...
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 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...
Modern energy transmission systems suffer from great voltage dropping due to enormous loads. Therefore, appropriate schemes should be devised to regulate the voltage. FACTS devices such as SVC are often used for this purpose. However, FACTS devised may leads to deteriorate of distance relays operation resulting in inaccurate estimation of faults locations. In this paper the effects of SVC on the distance...
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 a modified distance protection due to the presence of STATic synchronous COMpensator (STATCOM), one of the shunt connected Flexible Alternating Current Transmission System (FACTS) devices. The presence of STATCOM 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,...
This paper presents the effects of Static Synchronous Series Compensator (SSSC), one of the series 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,...
This paper presents the measured impedance at the relaying point in the presence of thyristor controlled series compensator (TCSC), one of the series connected flexible alternating current transmission system (FACTS) devices, in the case of inter phase, phase to phase and three phase, faults. The measured impedance at the relaying point itself depends on the power system structural and operational...
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...
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 presents the effects of STATic synchronous COMpensator (STATCOM), one of the shunt connected Flexible Alternating Current Transmission System (FACTS) devices, on the measured impedance at the relaying point in the case of the 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,...
This paper presents the measured impedance at the relaying point in the presence of Static Synchronous Series Compensator (SSSC), one of the series connected Flexible Alternating Current Transmission System (FACTS) devices. The presence of SSSC on a transmission line has a great influence on the measured impedance by distance relays. The measured impedance by distance relay itself depends on the power...
This paper presents the effects of thyristor controlled phase shifter transformer (TCPST), one of flexible alternating current transmission system (FACTS) devices, on the measured impedance at the relaying point in the case of the 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...
This paper discusses distance relays over-reaching in the presence of thyristor controlled series compensator (TCSC), one of the series connected flexible alternating current transmission system (FACTS) devices, on the far end of the second circuit of a double circuit transmission line, considering MOV operation. This is done by means of presenting the measured impedance at the relaying point and...
Distance relays are widely used as the main and back-up protection for transmission lines. They operate based on measured impedance at the relaying point, which is affected by several factors including pre-fault line loading and short circuit levels at the line ends. Introduction of Flexible Alternating Current Transmission System (FACTS) devices imposes further changes on the measured impedance at...
This paper presents the measured impedance at the relaying point in the presence of one of the series connected flexible alternating current transmission system (FACTS) devices, i.e. static synchronous series compensator (SSSC) which is equipped with a superconductor magnetic energy storage (SMES). The presence of SMES equipped SSSC on a transmission line greatly influences the tripping characteristic...
This paper presents the effects of thyristor controlled series compensator (TCSC), one of the series connected flexible alternating current transmission system (FACTS) devices, on the measured impedance at the relaying point for faults on a double circuit transmission line in the case of inter phase, phase to phase and three phase, faults. The measured impedance at the relaying point is affected by...
This paper presents the measured impedance at the relaying point in the presence of static synchronous series compensator (SSSC), one of the series connected flexible alternating current transmission system (FACTS) devices, in the case of inter phase, phase to phase and three phase, faults. The presence of SSSC on a transmission line has a great influence on the measured impedance at the relaying...
Protective relays have a remarkable impact on the security of the transmission systems after various disturbances. Undesirable relay operation will trip the lines and lead to cascading events. The difference between the apparent impedance seen by the distance relay and the relay characteristic, i.e., operation margin is a measure to identify the vulnerable relays. In this paper, the sensitivities...
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