Analysis and assessment of STATCOM-based damping stabilizers for power system stability enhancement |
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| Affiliation: | 1. Department of Statistics, North Carolina State University, 2311 Stinson Dr, Raleigh, NC 27695-8203, USA;2. Department of Statistical Science, Duke University, Box 90251, Durham, NC 27708-0251, USA;1. Wind Energy Institute, Technische Universität München, Boltzmannstraße 15, D-85748 Garching bei München, Germany;2. Dipartimento di Scienze e Tecnologie Aerospaziali, Politecnico di Milano, Via La Masa 34, I-20156 Milano, Italy;1. National Operator of the Electrical System (ONS), Rua Julio do Carmo 251, Cidade Nova, Rio de Janeiro, RJ, Brazil;2. Federal University of Rio de Janeiro (COPPE/UFRJ), Dept of Electrical Engineering, Caixa Postal 68504, Ilha do Fundão, Rio de Janeiro, RJ, Brazil;3. Fluminense Federal University (UFF), TCE/TEE/IC, Caixa Postal 33024 Leblon, CEP: 22440-970, Rio de Janeiro, RJ, Brazil;1. Power System Department, Politehnica University of Bucharest, 313 Spl. Independentei, 060042 Bucharest, Romania;2. Department of Electrical Engineering and Computer Science, University of Liège, Sart Tilman B37, B-4000 Liège, Belgium;3. Fund for Scientific Research & Department of Electrical Engineering and Computer Science, University of Liège, Sart Tilman B37, B-4000 Liège, Belgium |
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| Abstract: | Power system stability enhancement via STATCOM-based stabilizers is thoroughly investigated in this paper. This study presents a singular value decomposition (SVD)-based approach to assess and measure the controllability of the poorly damped electromechanical modes by STATCOM different control channels. The coordination among the proposed damping stabilizers and the STATCOM internal ac and dc voltage controllers has been taken into consideration. The design problem of STATCOM-based stabilizers is formulated as an optimization problem. For coordination purposes, a time domain-based multiobjective junction to improve the system stability as well as ac and dc voltage regulation is proposed. Then, a real-coded genetic algorithm (RCGA) is employed to search for optimal stabilizer parameters. This aims to enhance both rotor angle stability and voltage regulation of the power system. The proposed stabilizers are tested on a weakly connected power system with different disturbances and loading conditions. The nonlinear simulation results show the effectiveness and robustness of the proposed control schemes over a wide range of loading conditions. It is also observed that the proposed STATCOM-based damping stabilizers extend the critical clearing time (CCT) and enhance greatly the power system transient stability. |
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