A LQG Based Load Frequency Controller in a Competitive Electricity Environment
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Barjeev Tyagi
This paper presents the design of a Linear Quadratic Gaussian (LQG) regulator for the frequency control of a multi-area power system in a restructured competitive electricity market environment. A general model of the LQG regulator has been developed for multi-area system (with hydro and thermal generators) having Poolco and bilateral transactions. To account for the modeling uncertainties and non-measurable states, a Kalman filter has been designed to estimate the state variables. The controller uses these estimates, optimizes a given performance index, and reschedules the generators’ outputs according to their bids for the frequency regulation. The functioning of the proposed LQG regulator has been demonstrated on a four area test system and the results have been compared with those obtained by using an optimal PID controller.
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Articles in the same Issue
- Article
- An Optimum UPQC with Minimum VA Requirement and Mitigation of Unbalanced Voltage Sag
- Travelling Wave-Based Fault Location Scheme for Aged Underground Cable Combined with Overhead Line
- Time-Overcurrent Relay Coordination: A Review
- A LQG Based Load Frequency Controller in a Competitive Electricity Environment
- Duration Curve Approach for Managing Uncertainty of Renewable Generation While Dispatching a Mixed Generation Portfolio
- Optimal Placement of SVC for Static and Dynamic Voltage Security Enhancement
- Detecting High Impedance Faults Utilizing Combined Phase Voltages with Neutral Line Current
