Proposed mechanism for performance of power system stabilizers in the condition of strong resonance |
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| Affiliation: | 1. State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China;2. Department of Ultrasound, Sun Yat-sen University Cancer Center, Guangzhou, China;3. Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University Cancer Center, Guangzhou, China;4. Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou, China;5. Department of Molecular and Cellular Oncology, M. D. Anderson Cancer Center, Houston, Texas, USA;1. Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, United States;2. Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, United States;1. College of Science, Civil Aviation University of China, Tianjin 300300, PR China;2. College of Science, Tianjin University of Technology, Tianjin 300191, PR China;1. Department of Animal Production, University of Lleida, Spain;2. Agrotecnio Centre, University of Lleida, Spain;3. Physiology of Reproduction, Faculty of Veterinary Medicine, University of Liège, Belgium;4. Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca i Tecnologia Agroalimentàries (IRTA) and Departament de Sanitat i Anatomia Animals, Universitat Autònoma de Barcelona (UAB), 08193, Bellaterra, Barcelona, Spain |
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| Abstract: | This paper suggests a mechanism for the dynamic performance of damping controllers in the condition of strong resonance. The mechanism explains theoretically how the variation of a control parameter can move the resonance point in such a way to stabilize or destabilize the coupled modes. As an application, this mechanism is applied to justify the performance of power system stabilizers (PSSs) in a 2-area 4-machine test system, in which an exciter mode and an inter-area mode interact near a strong resonance. It makes the performance of the PSSs on the stability of the inter-area mode become severely dependent on the place of the PSS and the position of operating point with respect to the resonance point. In this circumstance, the PSSs of one of the system areas destabilize the inter-area mode. Considering the proposed mechanism, the appropriate location of the PSS and its proper gain value are identified to obtain the maximum damping of inter-area mode at each of the operating points. In addition, it is shown that due to the strong resonance, conventional methods make incorrect placement of the PSS; however, by using the real part of speed participation factors, suitable machines are chosen to place the PSS. This index provides important information regarding the impacts of strong resonance on the performance of PSSs. |
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