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5143B-04: Customer Sensitivity to Voltage Sags

ABSTRACT: Power quality complaints related to voltage variations occur either when the customer has equipment which is very sensitive to these events and is critical to the overall process or when the frequency of occurrence of the variations is interpreted as being unacceptable. It may be possible to make the equipment used in customer facilities less sensitive to voltage sags and momentary interruptions. For example, clocks and controls with low power requirements can be protected with a smal

Mar 1, 2010

Research

3312A: Guidelines for the Installation of Surge Arresters on Sub-Transmission and Transmission Lines Using Different Structure Designs at Voltages from 69 kV to 345 kV

Overhead Groundwires (OHGW) can provide good lightning protection, but tend to decrease transmission line reliability during other adverse weather conditions such as heavy wind and ice loading. Transmission Line Surge Arresters (TLSA) offer an effective alternative to the use of overhead groundwires for lightning protection, delivering approximately the same lightning reliability with fewer problems during icing conditions. However, target reliability will only be achieved if every TLSA has a

Mar 1, 2005

OTD

Research

50168: Strategies for Improving Reliability on Aging Overhead Distribution Systems

Distribution utilities are continually striving to deliver reliable power supply to their customers at affordable prices. Overhead distribution lines employ many components, the operating performance of which degrades with service age. Distribution lines with advanced service age experience frequent component failures, which lead to power outages and worsening reliability.Distribution utilities have adopted and implemented asset management programs aimed at prioritizing investments into the rene

Aug 11, 2021 - Sep 27, 2023

DEP

Research

3318: High Frequency De-Icing of Power Transmission Lines: Electromagnetic Radiation and Current Distribution

Icing of power transmission lines during winter storms is a persistent problem, causing outages and costing millions of dollars in repair expenses. CEATI Report No. T023700-3307 [1] proposed a method for de-icing the transmission lines through a combination of dielectric losses in the ice and skin-effect losses in the conductors.This report uses a simulation to analyze the distribution of current and voltage on a section of transmission line as well as the electromagnetic radiation of the electr

Jun 1, 2005

OTD

Research

0308C: CPF: Cost of Producing Ancillary Services Phase I

The reliability of electric power systems depends on the provision of ancillary services. Hydroelectric utilities historically provided these services as required with their costs bundled in the total electricity price. As the electric power industry undergoes significant market changes, there is increasing demand to unbundle the price of ancillary services. Competition, it is believed, will reward those generators that provide ancillary services at the lowest price. As hydroelectric utilitie

Jun 4, 2004

HPE

Research

33133: Application of New Innovative Materials in Line Design – Its Effectiveness in Improving Reliability and Performance

This report presents a comprehensive overview of the innovative materials used in the design of transmission line components and structures by utilities to upgrade the capacities of their systems. The document outlines the latest trends and advancements in the availability and adoption of innovative materials for line conductors, line insulators, support structures, and foundations. The report focuses on utilities’ practices in different parts of the world that includes North America, Euro

Oct 15, 2020 - Oct 7, 2022

OTD

Research

0335: CPF: Life of Digital Equipment Used for Monitoring and Control of Hydropower Stations

This study examines the service life of digital equipment used in hydro plant applications of protection, excitation and governor systems. It captures the experience of HPLIG participants based on a survey applied to a representative sample of their installations. The surveyed equipment is catalogued based on application, manufacturers and models. The study examines end-of-life factorsthat can influence the service life such as technical support (documentation, sources, response times, projectio

Apr 30, 2005

HPE

Research

50147: Evaluation Of Online Monitoring Technologies For Distribution Assets - Technology Watch

The volume of scientific literature exploring potential applications of online monitoring sensor technologies in the utilities industry continues to expand, along with the number of commercially marketed solutions. However, there appears to be a limited body of research literature that classifies the sensor technologies by functional types, discusses their main value propositions and cost considerations, and explores the extent of their practical application in the context of distribution system

Apr 16, 2018 - Oct 15, 2018

DEP

Research

3096: Station Battery System Maintenance and Condition Monitoring

By means of an extensive literature search and survey of utilities this report studies the available battery technologies proven for stationary substation applications, as well as good practices for battery system design, procurement, installation, commissioning, monitoring and maintenance. The alignment of maintenance practices with NERC requirements is reviewed. The functionality and experiences of utilities with available battery monitoring systems is reviewed as well as the economic justific

Nov 12, 2014 - Jan 15, 2016

Research

0344: CPF: Maintenance and Inspection of Cranes and Other Hydro Plant Lifting Equipment

A Technology Review (TR) was undertaken to increase the awareness of hydroelectric plant personnel with respect to laws, standards and best practices pertaining to the maintenance, testing and inspection or powerhouse cranes, wire rope hoists and lifting accessories. Standards, guidelines and regulations from selected jurisdictions taht apply to lifting equipment are presented.The main focuse of this report is to provide information which assists in the assessment of the condition of lifting equ

Apr 30, 2007

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