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33125: Vibration of Transmission Structures

High-voltage overhead power lines are designed and used to transmit electrical power from a source (i.e., power generation plants) to distribution nodes. Towers and poles are key components of each power transmission system, as they support overhead power lines. Transmission structures (e.g., towers and poles) are tall and have relatively lightweight components, resulting in low structural resonance frequencies and low inherent damping. As a result, these structures are susceptible to wind-induc

Sep 16, 2019 - May 30, 2022

OTD

Research

3404: On-Line Partial Discharge Measurements and Off-Line Dielectric Spectroscopy Measurements of Six 115 kV Oil-Filled Cable Systems

To investigate the effectiveness of Partial Discharge (PD) measurements on fluid fill cables, PDmeasurements were performed on six underground transmission cable circuits that ranged in agebetween 37 and 56 years old. Partial discharge activity was detected from the terminations of H11Land H3L Ca2, whereas for H3L Basin TS to Mill St partial discharge activity originating from withinthe main cable insulation was detected.

TUC

Research

0226: Investigating the Structural Safety of Cracked Concrete Dams

An international team of engineers experienced in the design of concrete dams was assembled to prepare a report presenting a practical, step by step process for the evaluation of cracking in concrete dams, as well as the determination of the appropriate steps to be taken to address any issues identified by this process and establish/carry out a crack management program for the dam. The report draws upon both the team’s considerable years of experience and publications issued by the ICOLD (

Sep 20, 2012 - Jan 7, 2015

DSIG

Research

3374: Methodology to Determine Transmission Line Life Cycle Costs

Life cycle cost analysis (LCCA) is the accepted method of determining the total cost of a capital project over the expected service life of the installed assets. In the case of singular assets, this analysis is straightforward and relatively simple. Projects that involve multiple assets, or components as part of an integrated system, present a more complex situation for life cycle cost analysis. Electric power transmission lines are comprised of many individual components, including

Sep 1, 2010 - Sep 30, 2012

OTD

Research

7035: Micro-CHP in a Residential Application

ADO

DSM

Research

0323: Surface Deterioration and its Effect on Performance

0323A: Phase 1 - This report details the results of a literature search that was undertaken. It further provides a characteristic table of the most common coatings, as well as a summary of telephone interviews conducted with two utility experts on the subject of the effects of surface deterioration on the turbine performance.Included in this final report are the CFD results of different turbine components on two different turbines (one Kaplan and one Francis). These CFD results were used to

HPE

Research

5057A: Electric Distribution Utility Roadmap: Planning for Now and 2010

In Phase I, an Electric Distribution Utility Roadmap report was released in January 2004, to provide a view of the evolution of the electric distribution utility environment over the next 20 years. The objective of Phase II is to develop an actionable plan from the Phase I Technology Roadmap that can be followed by the distribution utilities to justify and implement the technology initiatives required to meet current and future business needs. The approach for this phase involved initiating the

DEP

Research

33104: Guidelines to Establish Reliability of Existing Transmission Lines

The report presents a systematic methodology for determining the reliability of site-specific overhead line transmission structures considering the time dependent deterioration of decay for wood pole structures and metal loss (thickness loss) due to atmospheric corrosion for steel structures. In an earlier study entitled “Reliability Based Calibration Model for Latticed Transmission Towers: A Guide for Utility Engineers,” a step by step methodology was provided to determine the proba

Oct 1, 2015 - May 14, 2020

OTD

Research

5097: Solar Power Variability Impacts on the Distribution System

Variable power sources on a distribution system can produce light flicker, voltage fluctuations, and adverse interactions with voltage control systems like tap changers and switched capacitor banks. With the increasing appearance of photovoltaic (PV) sources on distribution systems (even those not considered to be in sunny areas), the need to realistically analyze these impacts has arisen. A single PV can have quite sharp output variations, but aggregating many small PV units over an area would

May 11, 2011 - May 15, 2013

DEP

Research

5075: Worker Protection on De-Energized Distribution Lines

Linemen working on isolated and de-energized distribution lines can be exposed to a number of shock hazards, such as induced currents, currents due to accidental energization, and currents from lightning strikes. Equal potential bonding and grounding may provide protection to linemen, but will not be necessary if all potential shock hazards can be unmistakably ruled out. This report presents the results of computer simulations of the shock hazard due to the current induced on the de-energized li

DEP

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