This article describes a data analysis tool that allows electric utility personnel to automatically and accurately compute the location of faults on power transmission lines and analyze fault data without cumbersome manual data retrieval and calculation procedures. When a fault is detected anywhere on the power network, an operator needs only to identify the faulted line, and the data analysis too...

This paper describes the techniques employed for extraction of device parameters for a 20MVA hydro-turbine generator in the Tennessee Valley Authority (TVA) power system. Several approaches were implemented in the extraction of parameters. Measurements on the generator were made prior, and subsequent, to extensive rework as part of a generator upgrade project. In addition, static exciter and overall response tests on the complete system were performed after the upgrade. The identified generator parameters before and after the upgrade are compared.

This paper briefly describes the special publication, "Fault and Disturbance Data Requirements for Automated Computer Analysis", prepared by working group III of the Relaying Practices and Consumer Interface Protection Subcommittee of the IEEE Power System Relaying Committee. The publication describes the analysis objectives and the data necessary to facilitate automated analysis.

In 1995 a +/-100 MVA Static Synchronous Compensator (STATCON)* was commissioned for the Tennessee Valley Authority (TVA) at the Sullivan Substation in North-Eastern Tennessee. This was an historic milestone in the initiative for Flexible AC Transmission Systems (FACTS) promoted by the Electric Power Research Institute (EPRI). The TVA STATCON is the first of its kind, using GTO thyristor valves, to be commissioned in the United States, and is currently the largest installation of this type in the world. Commissioning tests have now been completed and the STATCON is operating continuously on line. The demonstrated performance of the equipment has either met or exceeded expectations in all areas and has proven beyond doubt the viability of this type of equipment in high power transmission systems. This paper briefly reviews the STATCON installation and reports on the static and commissioning.

An optical current transducer (OCT) with a bulk type Faraday sensor demonstrated 0.3 % class accuracy for metering. The Faraday sensor had Bi12SiO20 (BSO) single crystals with right and left optical rotatory power to cancel out temperature dependency. A prototype 161 kV OCT installed in a TVA substation verified 0.3 % class performance. The OCT had the Faraday sensor, a gapped magnetic iron core, a 1.6 m optical insulator, and an optical interface.

The availability of high power gate-turn-off (GTO) thyristors has led to the development of controllable reactive power sources, using electronic switching converters, for use in power transmission systems, This new technology has resulted In an equipment that is fundamentally different from the conventional thyristor-controlled static var compensator (SVC), The new equipment is called the Static Condenser (STATCON) because its steady state output characteristics are similar to those of the rotating synchronous condenser. The paper describes the fundamental operating principles, functional characteristics, and basic control approach of the STATCON, with particular reference to a (+/-)100 Mvar prototype planned to be installed at the Tennessee Valley Authority (TVA) Sullivan Substation. This installation will be the first demonstration of a STATCON under the EPRI Flexible AC Transmission Systems (FACTS) program, and will be the largest installation of its type in the world.

Working Group D10 Applications of Expert Systems to Power System Protection of the Line Protection Subcommittee, Power System Relaying Committee, was organized in 1989 with the following assignment as finally adopted: Survey expert system technology to identify suitable and significant applications to power system protection. Write a technical paper that introduces protection engineers to expert systems and describes several potential applications.This paper represents the work performed by the Working Group in fulfilling its assignment.The paper is divided into sections that describe a number of potential applications thought to be significant by the members of the Working Group.

The Tennessee Valley Authority (TVA) is experimenting with one of the many concepts for the uses of phasor measurements, that of utilizing phasor measurement units (PMUs) as a state estimation system. However, the term state estimation no longer applies; what is being performed is a state determination in near real-time.<>

A summary of 90 responses to a survey on the use of adaptive functions in protective relaying systems is given. The survey was developed by Working Group K8 of the Substation Protection Subcommittee of the IEEE Power System Relaying Committee. This paper presents some background on the concept of adaptive protection, summarizes the questionnaire and gives an analysis of the questionnaire responses. Section A of the questionnaire which concerns satisfaction with existing relaying schemes is summarized in two figures. Section B of the survey which outlines 16 possible adaptive features is repeated in its entirety. A number of adaptive features suggested by the respondents are also analyzed.

The paper describes a new IEEE standard developed by the Power System Relaying Committee. It is intended for use by digital computer based devices which generate or collect transient data from electric power systems. The standard should facilitate exchange of the transient data for the purpose of simulation, testing, validation or archival storage. This paper provides an overview of the IEEE Standard, (C37.111) which should be referred to for a full description of the types and structures of the data files. It is expected that the standard will be particularly useful for users of digital relays, digital fault recorders, or digital simulation programs of electrical transient phenomena.

The authors discuss the development of an optical voltage sensor as part of an all optical sensor based revenue metering system. The magnetooptic or Faraday effect was used to implement a magnetooptic voltage transducer (MOVT) to measure voltage by sensing the current flow through a capacitor connected from a 161 kV transmission line to ground. The current sensor was a magnetooptic current transducer (MOCT) developed previously. The design of the voltage sensors using the magnetooptic effect allows the implementation of a revenue metering system using all optical sensors. This method of measuring voltage was previously unproven. The components of the all optical sensor revenue metering system, the site installation, and the data acquisition system used to monitor the system are described. Decisions leading to the design of the MOVT are discussed.< >

A current measurement technique using the magneto-optic or Faraday effect, has been developed, tested, and demonstrated. The device developed is a magneto-optic current transducer (MOCT). It uses the rotation of the plane of polarization by a magnetic field exhibited in certain glasses (Faraday effect). Test data obtained in an extensive field evaluation of the MOCT were compared with the design q...

In 1995 a /spl plusmn/100 MVA static synchronous compensator (STATCON) was commissioned for the Tennessee Valley Authority (TVA) at the Sullivan substation in North-Eastern Tennessee, USA. This was an historic milestone in the initiative for flexible AC transmission systems (FACTS) promoted by the Electric Power Research Institute (EPRI). The TVA STATCON is the first of its kind, using GTO thyristor valves, to be commissioned in the United States, and is currently the largest installation of this type in the world. Commissioning tests have now been completed and the STATCON is operating continuously online. The demonstrated performance of the equipment has either met or exceeded expectations in all areas and has proven beyond doubt the viability of this type of equipment in high power transmission systems. This paper briefly reviews the STATCON installation and reports on the static and dynamic performance observed during commissioning.