Log InBecome a Member
Log InBecome a Member

Search results

Events

Research

Selected Filters

No filters selected.

Interest Group

Viewing 550 - 560 of 2181
Sort By
Relevance

Research

0311: CPF: Biodegradable Oils and Greases in Hydroelectric Plants

Hydraulic and lubricating systems are essential to the operation of hydroelectric plants. A common factor in most of these systems is the potential for leakage and spillage of fluids during use and storage. The proximity to waterways makes this particularly important. Although most equipment manufacturers still specify mineral (petroleum) based hydraulic fluids and lubricants, strict environmental regulations and the likelihood of stricter regulations, as found in Europe, in the future are raisi
Apr 30, 2001

Research

50125: Distributed Automation and Load Shedding Functions

Distribution automation (DA) is focused on protective actions where the control operation is used to limit the reach of some contingency. It may be, for example, adding capacitive support to maintain the voltage within ANSI limits. It may also be performing some switching actions to reconfigure the system and limit the number of customers without power. There are types of equipment that operate autonomously, with any control action validated with some future scan of the network state.Load sheddi
Apr 8, 2014 - Oct 1, 2014

DEP

Research

3724: Step and Touch Coordination during Substation Expansion

Properly designed substation grounding is intended to provide adequate safety and reliability to workers against unsafe potentials. Step and touch potential coordination depend on the permissible current by body weight, the fault clearing time, body resistance and earth resistance underfoot. Stressing potentials arise at many locations during normal operations, such as substation equipment cabinets that must be touched, disconnect switch operating handles and perimeter fence gates. During constr
Oct 13, 2017 - May 30, 2019

GL

Research

30130: Design Guide for Station EMI Protection

This document provides guidance for the development of substation designs for EMI immunity. It reviews the various categories of EMI sources, namely:Unintentional electromagnetic interference (EMI)Conducted noise from switching transients or lightning surgesGeomagnetic disturbance (GMD)Intentional electromagnetic interference (IEMI)High-altitude electromagnetic pulse (HEMP)Their manifestations and appropriate mitigation techniques are described. Appropriate design and application standards are d
Apr 6, 2018 - Jun 5, 2019

SE

Research

50135: The Best Poles for Distribution Systems

This report compares the characteristics and total ownership costs of various types of commercially available poles used in distribution systems in North America and Europe. The types of traditional wood poles that are considered include: southern yellow pine, Lodgepole pine, red pine, Douglas fir, and western red cedar. The types of non-wood poles that are considered include: steel, ductile iron, cast concrete, spun concrete, and composite. Laminated wood poles are also examined, which are engi
Mar 29, 2016 - Dec 13, 2017

DEP

Research

3258: Evaluation of Transmission Line Steel Structure Coatings

This study presents a state-of-the-art review on maintenance practices and coating systems for protecting the above-ground portion of steel transmission tower structures from corrosion. Information was obtained from a variety of sources: (1) a survey of major international electric utilities, (2) technical data and product recommendations provided by coating suppliers, (3) recent standards issued by NACE, IEEE, and ISO, and (4) published electric utility case studies. The best practices for stee
Jan 27, 2015 - Nov 9, 2017

OTE

Research

5176: Guide for Variable Frequency Drive Installations

This handbook provides the reader with information for the issues associated with the use of variable frequency drives (VFDs). The handbook also provides a description of the AC motor characteristics when operated at fixed speed from the utility line and when operated by a VFD. The many potential issues upstream and downstream of the VFD are discussed and mitigating solutions are provided. Since the electrical characteristics of the distribution system are different at every site, VFD issues wil
Aug 11, 2017 - Nov 7, 2018

PQ

Research

3294: Updated Guideline on Best Practices for Inspection and Data Collection

May 26, 2023 - Jun 30, 2023

OTE

Research

3393: Dynamic Response of Transmission Lines under Wind

T133700-3393-1This report reviews the literature on the dynamic response of a Transmission Line (TL) system under a conventional atmospheric boundary layer as well as non-synoptic wind loading (downbursts and tornadoes). Gust-induced response for the conductors and towers is covered and limitations in the current structural design codes for wind loading are identified. Four central sections are considered in this study covering synoptic wind loading, downburst, tornado loading, and conclusions a
Sep 1, 2013 - May 8, 2016

OTD

Research

3322: Design Guide to Control Galloping of Transmission Line Conductors

This guide provides a comprehensive review of conductor galloping. The aspects covered include the various weather conditions that lead to galloping, and the locations and types of overhead lines likely to experience galloping. The known information on the effects of galloping—including the magnitudes of the motions, the dynamic loadings applied to the conductors and structures, and the different forms of immediate and long term damage—are described. Recently developed theoretical ap
Apr 1, 2006

OTD

56 of 219
Viewing 550 - 560 of 2181
Back to Top

Selected Filters

No filters selected.

Interest Group