Computation of critical clearing time for detailed machine models:impact of stressed system loading

Computation of critical clearing time (CCT) is carried out for detailed machine models using the generator, exciter and governor-turbine dynamics, The simulations are carried out at both the base-case system loading and the stressed system loading. For the stressed-case loading, all load buses are uniformly loaded with uniform power factor and CCT is computed. Also a comparison is made with the classical machine model results for both base and stressed system loading conditions. The results are compiled for faults at all buses for two test systems and provide a benchmark for comparison of CCT computed by other method

Adaptive STATCOM Control for a Multi-machine Power System

Synchronous static compensator (STATCOM) can be used to improve the dynamic performance of a power system. This article presents an online adaptive pole-shift method for stabilization of a multi-machine power system. Considering the speed deviation of the generator to which the STATCOM is connected as the output and the magnitude of the converter voltage as the input, an adaptive linear plant model is estimated. The stabilizing control is derived from a variable pole-shift strategy which moves the poles of the identified model to the center of unit circle in z-domain. The controller performance has been tested for various disturbances from a number of simulation studies on a multi-machine power system. It was observed that the adaptive algorithm converges very quickly and also provides robust damping profiles to the under damped power system. Index Terms — Adaptive control, Variable pole-shift control, Power system damping control

Computation of critical clearing time for detailed machine models:impact of stressed system loading

Computation of critical clearing time (CCT) is carried out for detailed machine models using the generator, exciter and governor-turbine dynamics, The simulations are carried out at both the base-case system loading and the stressed system loading. For the stressed-case loading, all load buses are uniformly loaded with uniform power factor and CCT is computed. Also a comparison is made with the classical machine model results for both base and stressed system loading conditions. The results are compiled for faults at all buses for two test systems and provide a benchmark for comparison of CCT computed by other method

A Tabu Search Algorithm For Maintenance Scheduling Of Generating Units

A new heuristic algorithm based on the Tabu search has been proposed for the maintenance schedule (MS) of electric generation units. The algorithm was developed, implemented and tested on an integrated model for the MS problem. The model. used two criteria: minimizing the total generator operating cost and levering the reserve. Each of the above criteria is used with the following constraints: maintenance completion, crew size, precedence, reserve and reserve constants. The performance of the Tabu search algorithm is promising. The Tabu search algorithm solved two power system problems, 4 units and 22 units. The implicit enumeration algorithm was used to check the validity and the quality of the Tabu search solution. (C) 2000 Published by Elsevier Science S.A. All rights reserved

A Tabu Search Algorithm For Maintenance Scheduling Of Generating Units

A new heuristic algorithm based on the Tabu search has been proposed for the maintenance schedule (MS) of electric generation units. The algorithm was developed, implemented and tested on an integrated model for the MS problem. The model. used two criteria: minimizing the total generator operating cost and levering the reserve. Each of the above criteria is used with the following constraints: maintenance completion, crew size, precedence, reserve and reserve constants. The performance of the Tabu search algorithm is promising. The Tabu search algorithm solved two power system problems, 4 units and 22 units. The implicit enumeration algorithm was used to check the validity and the quality of the Tabu search solution. (C) 2000 Published by Elsevier Science S.A. All rights reserved

Adaptive STATCOM Control for a Multi-machine Power System

Synchronous static compensator (STATCOM) can be used to improve the dynamic performance of a power system. This article presents an online adaptive pole-shift method for stabilization of a multi-machine power system. Considering the speed deviation of the generator to which the STATCOM is connected as the output and the magnitude of the converter voltage as the input, an adaptive linear plant model is estimated. The stabilizing control is derived from a variable pole-shift strategy which moves the poles of the identified model to the center of unit circle in z-domain. The controller performance has been tested for various disturbances from a number of simulation studies on a multi-machine power system. It was observed that the adaptive algorithm converges very quickly and also provides robust damping profiles to the under damped power system. Index Terms — Adaptive control, Variable pole-shift control, Power system damping control