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| Author(s): |
Daniel Souto Siqueira
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) |
| Defense date: | 2017-03-06 |
| Examining board members: |
Luís Fernando Costa Alberto;
Aguinaldo Silveira e Silva;
Luiz Carlos Pereira da Silva;
Marco Henrique Terra;
José Carlos de Melo Vieira Júnior
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| Advisor: | Newton Geraldo Bretas |
| Abstract | |
The TCSC device has been used with great efficiency in electric power systems to improve transient stability and to provide damping to electromechanical oscillations. Several studies have been developed in order to synthesize control laws for these devices. Most of the techniques used to design controller in electric power systems use linearized models. Controllers designed with linear techniques can lose efficiency when the operating point varies significantly. Nonlinear controllers can provide robustness to these variations. Among various techniques for non linear control design, the ones based on Lyapunov functions and/or energy function shave been widely used in electric power systems. These techniques require the existence of a Lyapunov function and/or energy function for the design, however, it was shown the non existence of Lyapunov function and/or general energy function for comprehensive electrical power system models, such as,system with losses. Generalized energy functions emerged as an alternative to deal with these classes of models that exhibit complex behavior. Herewer develop a generalized energy function to electrical power system models preserving the structure of the network, with a third-order model for synchronous generators and considering losses in the transmission system. With the proposed generalized energy function, nonlinear control laws are synthesized for TCSC devices, which are independent of the network topology, employ local and/or remote feedback signals. The designed control laws significantly improve the system dynamics and greatly increase stability regions of electrical power system. (AU) | |
| FAPESP's process: | 11/23345-8 - General Energy Function of Control Applied to TCSC Regulators in Power Systems. |
| Grantee: | Daniel Souto Siqueira |
| Support Opportunities: | Scholarships in Brazil - Doctorate |