Showing papers by "Georgia Power published in 1988"

Power system remedial action methodology

Abstract: The authors address the problem of remedial-action computations for the purpose of alleviating overloads, abnormal voltages, etc. The method is based on a linear programming (LP) approach. Applications for voltage/reactive-power control, discrete capacitor/reactor switching, load transfer, and interchange control are considered. The method is optionally based on a DC or AC network model. It utilizes a number of innovations to yield an efficient computational procedure. The major innovations are: a procedure for determining coherent constraints which results in a fast identification of active constraints, fast linearization procedures for active constraints, procedures to define the region of validity of the linearized model, and a fast sparsity-coded LP algorithm. The performance of the method for large power systems is evaluated. >

Critical span analysis of overhead conductors

Abstract: Those factors that influence the location and number of critical spans are identified. Sensitivity parameters are introduced and used to show how the critical span is influenced by weather conditions, conductor properties and conductor current. The weather conditions along the route of the line are shown to be the dominant factors which affect the conductor temperature and ultimately the number and location of critical spans. The weather data were used in a computer program to predict real-time conductor temperature, and the span temperatures at the five locations. In addition, a statistical analysis of the temperature data was used to determine the location of a critical span under various weather conditions. Temperature data collected at the test span, weather data from the five sites, and the results of the sensitivity analysis all confirm the difficulties in locating critical spans, particularly when they are governed to a large degree by local weather conditions that are highly variable and practically impossible to predict. >

Transformer alarm annunciator

Abstract: The present invention is a transformer alarm annunciator which discloses a system that transmits a general alarm signal to a central location in response to one of a plurality of alarm conditions without blocking the signal path, so that in the event of system failure the alarm signal will still be transmitted as a transformer alarm. The device provides a means to disable a particular alarm condition while allowing the remaining alarms to be monitored.

Effects of Unstable and Microbially Contaminated Fuel on Vehicle Operations: A Diesel Fuel Preventive Maintenance Program

Abstract: During 1983, the Georgia Power Company experienced a problem that appeared to be fuel related. Specifically some of the new light duty trucks equipped with diesel engines began experiencing fuel pump failures and severelyfouled filters. Analysis of fuel specimens from in-ground fuel storage tanks and the fuel filters indicated a high level of microbial activity in both areas and a destabilized fuel, which exhibited a tendency to form insolubles when heated. In addition, water found in some of the in-ground diesel storage tanks was of sufficient quantity to be of great concern. As a result of these findings the following steps were taken: (1) The in-ground diesel fuel storage tank fill pipe area was raised and a new fill pipe cap fitted with a proper seal. (2) Water and microbial sludge were pumped from the system and sampling was done to insure their removal. (3) A biocide and multifunctional fuel stability compound were added to the fuel, and subsequent tests for continuing activity were conducted. (4) A program for continuing preventive maintenance and testing was established for the entire fleet. This paper will deal with the details of the problem, identification of the source, and the corrective action taken.