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3117: Power System Stabilizers - Application, Practical Considerations and Guideline for Tuning

Power system stabilizers (PSSs) have been utilized in the electric power industry since the 1970's. The concept was first introduced by De Mello and Concordia in 1969, based on the fundamental concepts of damping and synchronizing torques. Although much research has been done in developing more refined methods for tuning and designing PSSs in the four decades that have followed, the fundamental theoretical basis is still the same - namely, for a PSS to be effective, it must induce significant ad

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Research

3124: New York State Power Grid Geomagnetic Storm and E3-HEMP Threat - Vulnerability Assessments

This study provides a detailed review of the NY State power grid to assess the vulnerability of the grid to probable and extreme geomagnetic storm events and similar electromagnetic disturbances triggered by a high-altitude nuclear burst generating a geographically widespread disturbance in the geomagnetic field (i.e. Late-time EMP or E3 environment). This study undertook the development of detailed system models of the backbone of the US transmission grid and more detailed representation

Apr 20, 2011 - Nov 1, 2012

Research

3131: PMUs: New Applications and Disturbance Monitoring

With over 1,700 PMUs (Phasor Measurements Units) deployed in the North American grid, numerous PMU-based applications are being developed by vendors, utilities, and academia. These applications have various functionalities and different technology readiness levels, and fall into different categories based on their functionalities and time horizon of use.During this project, the author worked closely with NASPI, DOE, NERC SMS (Synchronized Measurement Subcommittee), IEEE PES CFWG (Cascading Failu

Aug 8, 2016 - Dec 22, 2017

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3116: CPF: Dynamic Loading of Power Lines to Increase Transmission Network Capacity

Transmission network capacity is limited by line voltage and by the ability of the conductors to carry current, known as ampacity. While system voltage tends to be fixed, the line currents are inherently dynamic with fluctuations in response to customer loads and internal system configuration. Additional transmission network capacity can be obtained in some cases by increasing the ampacity of lines through the use of improved survey and monitoring methods. Some utilities have more than twenty ye

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3103: Commitment Techniques for Combined-Cycle Generating Units

The purpose of this document is to present the optimization methodologies that are currently suggested to solve the Security Constrained Unit Commitment (SCUC) problem, and the ways of considering combined-cycle units when using those methodologies.The report summarizes the major techniques used for the SCUC, including Lagrangian Relaxation, Bender Decomposition and Mixed Integer-Linear programming. A summary of operating characteristics of the combined-cycle generating units (CCGU) is presente

Research

3133: Fault Current Management at the Medium Voltage Level (15-50 kV)

This report provides a list of fault mitigation measures for the medium voltage level (15 kV to 50 kV) that results from previous project experience, as well as a review of the information available in technical papers, literature, manufacturer’s information, etc. The list includes both traditional approaches and new methods for fault mitigation (including mitigation measures under development).In addition to the literature review, a survey has been prepared and sent to utilities in North

Jul 4, 2016 - May 25, 2018

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3135: Investigation, Control and Mitigation of SSTI and SSCI Between HVDC Installations and Wind Turbines or Turbine Generators

This report provides an introduction to sub-synchronous interaction (SSI) phenomena, including sub-synchronous resonance (SSR), sub-synchronous torsional interactions (SSTI), and sub-synchronous control instability (SSCI). It includes a discussion of:SSTI phenomena between high voltage direct current (HVDC) installations and other power system equipment, including conventional turbine generators;SSCI phenomena between series-compensated line and windfarms, especially with type 3 doubly-fed wound

Sep 22, 2017 - Oct 21, 2017

Research

3120: Calculation of Short Circuit Currents, Their Attenuation and Corresponding X/R Ratios

The objective of the project is to develop methodologies for (a) accurate computation of the total fault current and (b) selection of safety margins for the purpose of determining breaker adequacy or selection of breakers. The goal is to identify methods that will be applicable to all nominal voltages from distribution to ultra-high voltage equipment. Any new methods should be efficient and applicable to large scale systems.The report provides an analysis of the standard methods. The report also

Sep 15, 2010 - May 15, 2013

Research

3145: Best Practices to Obtain and Verify EMT Models

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3148: IEEE 2800-2022 Standard: Adoption Strategies and Implementation Considerations

PROJECT OVERVIEW & OBJECTIVES:A. Provide guidance to planners on the changes required to existing planning and interconnection standards to adopt IEEE 2800,B. Comment on the impact to the reliability of the overall power system of adopting this standard, andC. Review similar work being undertaken by organizations such as EPRI and build on this work.

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