Showing papers on "Blackout published in 1997"

Interactive long-term simulation for power system restoration planning

Abstract: The problem of restoring a power system following a complete blackout is complex and multi-faceted, Many control actions have to be performed on time, while constraints such as power balance and system stability have to be carefully respected, In this paper, the application of long-term dynamic analysis in studying frequency and voltage responses due to load and generation mismatches in isolated systems or during extension of the existing system in the restoration phase is presented. Simulation results covering the main steps of the Hellenic power system restoration process following a recent total blackout are presented and discussed.

Analysis of the power blackout of June 8, 1995 in the Israel Electric Corporation

Abstract: This paper is a technical survey of the power failure which affected the Israeli electrical network on June 8, 1995. As a result of this failure, about 70% of consumers were disconnected from the energy supply. In the first part of the paper, the general power system characteristics and the condition of the power network before the incident are summarized. In the second part, the events during and after the failure are described. The third part summarizes the lessons learned from the power blackout and outlines future strategies to be adopted by the Israel Electric Corporation.

Application of expert system to power system restoration in sub-control center

Abstract: An expert system is developed for emergency operation of power system restoration in a sub-control center. The proposed method restores the blackout area in a power system by using sensitivity analysis and heuristic rules. The rules are categorized into flow-control rules, energization rules, line switching rules, load shedding rules, and voltage correction rules. The switching (opening, closing) of transmission lines, transformers and shunt capacitors, and the load shedding are used for the emergency operations in this paper. For the real time recognition of the network topology, the power system components are represented in hierarchical data structure.

Blackout backup for traffic light

Abstract: A system and method for automatically supplying a flashing line voltage from power stored in an auxiliary battery to power red traffic signal lamps using clusters of light emitting diodes during a blackout condition. A plurality of flash block connectors are pin-to-pin compatible with the flash block jumper blocks of an already installed traffic light control system so that the existing system is retrofitted without any cabinet or field rewiring or any cutting or crimping of the wires.

Vehicle light control system

Abstract: An improved blackout control system located within the passenger compartment allows the driver to alter the normal and emergency lighting features of the vehicle. The blackout control system comprises an illuminated control panel unit modified by harness and control units which are attached to the lighting system of a conventional emergency vehicle. A four-position three-level emergency "Red" switch is provided as an improvement on the control panel. A second blackout reset switch is provided to restore power to the blackout switches. A third blackout switch is provided on the panel which disables the brake and backup lights of the vehicle. A fourth switch for blacking out the tail lights, parking and/or corner lights is provided. A fifth blackout switch is provided to disable headlight daytime running lights. A sixth high beam sneak light switch is provided to activate a high beam sneak light mounted on the front of the vehicle with less lighting than the driving lights. A seventh low beam sneak light is provided with a hooded sneak light located in front of the vehicle which may be used to provide less lighting in front of the vehicle than the normal horizontally disposed headlights.