This paper describes the development and evaluation of a method for identifying the coherency behavior of generators for various power system disturbances. This information is used as a basis for forming dynamic equivalents which can be applied in transient stability studies.

Identification of Coherent Generators for Dynamic Equivalents

This paper presents new aggregation algorithms for obtaining reduced order power networks when coherent generators are aggregated. The generation terminal bus aggregation algorithm in the EPRI DYNRED software tends to stiffen the reduced order network during the aggregation process, thus increasing the frequencies of inter-area modes. The inertial and slow coherency aggregations will decrease the stiffening effect and produce, for the same coherent machine groups, aggregate networks with improved inter-area mode approximations. This paper contains new procedures to construct these aggregate networks and demonstrates the benefits of these new aggregate networks on a 48-machine power system using eigenvalues and nonlinear simulations. >

Inertial and slow coherency aggregation algorithms for power system dynamic model reduction

https://www.matlabi.ir/wp-content/uploads/bank_papers/p%20paper/p46_Matlabi.blogfa.com.pdf

Sliding mode based load-frequency control in power systems

This paper documents experience with applications of dynamic reductions to large power system models for stability studies. The main factors that affect the quality of the reduced models are discussed. The quality of reduced models and the benefits of dynamic reductions are demonstrated for three large interconnected power systems.

Dynamic reduction of large power systems for stability studies

This paper presents a brief review of techniques available for reducing large systems to smaller equivalents This paper is divided into high frequency equivalents, low frequency equivalents, and wideband equivalents Numerical examples are presented to demonstrate selected methods of high frequency equivalencing

Dynamic System Equivalents: A Survey of Available Techniques

A new technique is described for the automatic formation of dynamic equivalents of generating units represented by detailed models.

A. J. Germond

Papers

Dynamic Aggregation of Generating Unit Models