Showing papers by "Rajiv K. Varma published in 2005"
TL;DR: In this paper, the performance of distance protection relays when applied to protect shunt Flexible AC Transmission System (FACTS) compensated transmission lines is evaluated using transient simulation software, EMTDC.
Abstract: This paper presents a study of the performance of distance protection relays when applied to protect shunt Flexible AC Transmission System (FACTS) compensated transmission lines. The objective of this study is to evaluate the performance of distance relays on transmission lines with FACTS devices applied for mid point voltage control. Effect of two types of shunt FACTS devices, Static Var Compensators (SVC) and Static Synchronous Compensators (STATCOM) are studied. The study is conducted in three stages. First the situation is studied analytically, where the errors introduced in the impedance measurement due to the presence of shunt FACTS devices on the line are analyzed. In the second stage, the situation is simulated using transient simulation software, EMTDC. In this method, the response of FACTS devices for different fault conditions and system conditions is also modeled. This method brings out some unique problems that would be experienced by the distance relays due to some specific characteristics of the FACTS devices. Finally, the findings are confirmed by testing a commercial distance relay using a Real Time Digital Simulator (RTDS). The results obtained by testing the commercial relay validate the analytical and simulation studies.
139 citations
12 Jun 2005
TL;DR: In this paper, the authors describe the indigenous development of a remotely operable load break switch (LBS), which is suitable for switching operations in low voltage distribution networks, and the developed switch has been installed and commissioned in a 10 MVA distribution system of the campus of Indian Institute of Technology Kanpur, India.
Abstract: This paper describes the indigenous development of a remotely operable load break switch (LBS), which is suitable for switching operations in low voltage distribution networks. The switch has been tested as per industry standards. The developed switch has been installed and commissioned in a 10 MVA distribution system of the campus of Indian Institute of Technology Kanpur, India. An improvement in the average power factor has been recorded after implementation of remote monitoring and control using the load break switch. Also, many indirect benefits have resulted, such as, simplification of maintenance work, customer satisfaction, and improvement in utility reputation to provide better services in the IIT Kanpur distribution system.