Robust control in power systems by Bikash Pal
By Bikash Pal
Robust keep watch over in strength platforms offers with the functions of recent ideas in linear process concept to regulate low frequency oscillations in energy platforms. The booklet in particular specializes in the research and damping of inter-area oscillations within the structures that are within the diversity of 0.2-1 Hz. The damping keep an eye on motion is injected via excessive strength digital units often called versatile AC transmission procedure (FACTS) controllers. 3 regular evidence controllers: controllable sequence capacitors (CSCs) controllable section shifters (CPSs) and static var compensators (SVCs) were utilized in this publication to regulate the inter-area oscillations.
The evaluation of linear method idea from the viewpoint of energy approach regulate is defined via examples. The damping keep an eye on layout is formulated as norm optimization challenge. The H_infinity, H2 norm of effectively outlined move capabilities are minimized in linear matrix inequalities (LMI) framework to procure wanted functionality and balance robustness. either centralized and decentralized keep watch over buildings are used.
Usually the transmission of suggestions sign from a distant position encounters delays making it tricky to regulate the procedure. Smith predictor established technique has been effectively explored during this publication as an answer to this kind of problem.
Robust keep an eye on in strength platforms can be helpful to academicians within the components of strength, keep an eye on and procedure thought, in addition to execs within the energy industry.
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Additional resources for Robust control in power systems
Skogestad and Postlethwaite, 20011 Skogestad, S. and Postlethwaite, I. (2001). Multivariable Feedback Control. John Wiley and Sons, UK. [Smed, 19931 Smed, T. (1993). Feasible eigenvalue sensitivity for large power systems. IEEE Transactions on Power Systems, 8(2):555-563. C. (1982). Selective modal analysis with applications to electric power systems, part i and part ii. IEEE Transactions on Power Apparatus and Systems, PAS-101 :3 117-3 134. F. (1999). Selection of robust installing locations and feedback signals of FACTS-based stabilizers in multi -machine power systems.
1 Sensitivity to swing mode The feedback signal must have a high degree of sensitivity at and around the swing mode frequency to be damped which will appear as a high peak in the Bode diagram. In other words, this means that the swing mode must be observable in the feedback signal. 2 Little or no sensitivity to other swing modes This is an obvious aim from the perspective of minimizing the interaction between modes through the controller. A FACTS device in a transmission line will only influence those modes responsible for power swings observed on that line.
Concepts for design of facts controllers to damp power swings. Power Systems, IEEE Transactions on, 10(2):948-956. C. (1987). Computation of balancing transformations and other applications of simultaneous diagoninalization algorithms. IEEE Transactions on Automatic Control, 32(2): 115-122. [Martins, 20001 Martins, N. (2000). Impact of interactions among power system controls. 16,Technical Brochure 166. [Martins and Lima, 19901 Martins, N. G. (1990). Determination of suitable locations for power system stabilizersand static var compensatorsfor damping electromechanical oscillations in large power systems.