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This paper presents an effective practical approach for identifying optimal locations of Phasor Measurement Units (PMUs) to achieve complete system observability. The approach, implemented in Physical and Operational Margins/Region Of Stability Existence (POM/ROSE) software, is based on automated iterative process of forming variables and constraints of a binary integer programming problem. The problem...
This paper describes the implementation of Critical Clearing Time (CCT) software at Entergy for transient stability analysis. The software utilizes a fast time-domain simulation method to compute critical clearing time under different fault conditions. The framework presented in this paper allows for automated critical clearing time computations that eliminates manual time-consuming cut-and-try critical...
This paper describes enhancements to ATC's cascading study criteria and the implementation of a fast automated process using POM/OPM software for conducting comprehensive steady state multiple element contingency screening and cascading analysis, finding mitigations to restore the system to be within emergency and/or normal performance limits, and automatically tabulating significant results and summaries...
This paper describes a methodology and an automated process to implement node-breaker capabilities for representing major stations within Con Edison's footprint. This process creates a “hybrid” power flow model of Con Edison's system such that the user-defined stations are represented using the node-breaker model and the rest of the system is modeled using bus-branch representation. The process is...
This paper describes the implementation of Region Of Stability Existence (ROSE) software at ISO-NE for on-line estimation of the power system transfer capability based on voltage and thermal limitations and for security monitoring. The software utilizes State Estimator (SE) and synchrophasor PMU data sets for determining the power system operational margin under normal and contingency conditions....
This paper is a result of ongoing activity carried out by Understanding, Prediction, Mitigation and Restoration of Cascading Failures Task Force under IEEE Computer Analytical Methods Subcommittee (CAMS). The task force's previous papers are focused on general aspects of cascading outages such as understanding, prediction, prevention and restoration from cascading failures. This is the first of two...
This paper is a result of ongoing activity carried out by Understanding, Prediction, Mitigation and Restoration of Cascading Failures Task Force under IEEE Computer Analytical Methods Subcommittee (CAMS). The task force's previous papers [1, 2] are focused on general aspects of cascading outages such as understanding, prediction, prevention and restoration from cascading failures. This is the second...
With the increasing comprehensiveness of the North American Electric Reliability Corporation standards, it is essential that software developments parallel the requirements of bulk power system owners, operators, and users that are applicable to approved reliability standards. In this paper, the authors present and discuss the results of a Transmission Planning compliance assessment conducted by Southwest...
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