MBSE Colloquium: Nelson Martins, "Power System Damping Control"
Tuesday, October 6, 2015
1146 A V Williams Bldg
Model-Based Systems Engineering Colloquium
Recent Results in Power System Damping Control and RLC Network Model Order Reduction
CEPEL (Brazilian Electrical Energy Research Center)
Rio de Janeiro, Brazil
Host: Alireza Khaligh
The presentation will address two topics related to modal analysis and control of power systems, the first being the development of a modal stabilizer for the independent damping control of aggregate generator and intraplant modes in multigenerator power plants. A modal 2-channel power system stabilizer structure is proposed. One channel is designed to damp only the aggregate generator electromechanical mode while the other is designed to damp only the intraplant modes. It is analytically demonstrated that the dynamics of the two channels are decoupled by the feedback design. The second topic covered in the talk concerns modal equivalents for transmission networks containing distributed parameter lines. The modeling of large RLC networks is initially described in the Differential- Algebraic Equations (DAE) formulation, also known as the Descriptor System formulation, followed by the Y(s) formulation, which enables the rigorous modeling of generic RLC networks incorporating distributed parameter transmission lines. The Sequential Multivariable Dominant Pole Algorithm (SMDPA) is introduced for computing the dominant poles and residue matrices associated with multivariable transfer functions of infinite systems. This algorithm is effectively used to obtain true modal equivalents for infinite systems, over a specified frequency window, as verified using detailed results for two test power systems: the IEEE 34-bus and the 118-bus systems. Comparative results show that the new algorithm is much more cost-effective for accurate model order reduction than using well-established algorithms.
Dr. Martins has been with CEPEL, the Brazilian Electrical Energy Research Center, Rio de Janeiro, since 1978, developing methods and computer tools for power system analysis, dynamics and control, and specialized eigensolution methods. He is the originator and long-time developer of the widely used small-signal stability software PacDyn, was Technical Director (2001-2003), and currently Research Consultant, Electrical Power Systems, as well as Assistant to the Director General of CEPEL. He served on many working groups on power systems analysis, operations and blackouts for Brazil and for the IEEE. His recognitions include Distinguished Member of CIGRE (2002), the CIGRE Technical Committee Award (2007), IEEE Fellow (1998), the IEEE-PES PSDP Technical Committee Prize Paper Award (2013), the IEEE PES Prabha Kundur Power System Dynamics and Control Award (2015), and being elected a Foreign Member of the US National Academy of Engineering (2015). Dr. Martins has published widely, and has regularly supervised PhD and MSc students in collaboration with faculty colleagues. He has delivered brief power system dynamics and control courses in 19 countries. He completed his BSc (1972) at University of Brasilia, and the MSc (1974) and PhD (1978) degrees from UMIST. A list of his publications and additional information may be found at: http://www.nelsonmartins.com/