Power oscillation damping method suitable for network reconfigurations based on converter interfaced generation and combined use of active and reactive powers. (July 2023)

• Record Type: Journal Article
• Authors: Jankovic, Njegos; Roldan-Perez, Javier; Prodanovic, Milan; Suul, Jon Are; D'Arco, Salvatore; Rodriguez, Luis Rouco
• Is Part Of: International journal of electrical power & energy systems. Volume 149(2023)
• Publication Date: 2023-07
• Subjects: Power oscillation damping -- Low-frequency oscillations -- Power modulation -- Network reconfiguration -- Power oscillation damping controller; Electrical engineering -- Periodicals; Electric power systems -- Periodicals; Électrotechnique -- Périodiques; Réseaux électriques (Énergie) -- Périodiques; Electric power systems; Electrical engineering; Periodicals; 621.3
• DOI: 10.1016/j.ijepes.2023.109010
• Languages: English
• ISSNs: 0142-0615

Abstract

Abstract: Power system stabilisers (PSSs) are commonly used in synchronous generators for damping low-frequency oscillations. However, many of these machines have been replaced by converter-interfaced generators (CIGs), such as those used in solar power plants. This means that CIG-based power plants should also contribute to oscillation damping. Moreover, CIGs may use both active and reactive power for power oscillation damping (POD). However, their combined use has been seldom studied in the literature. Moreover, only a few articles have addressed the adaption of POD controllers when the power system changes (e.g., after a fault). In this paper, a POD controller for CIG-based power plants is proposed that is suitable for operation in power systems exposed to reconfiguration. This controller takes advantage of both active and reactive power injection to maximise the damping of the power system. This controller is based only on local measurements so communication systems are not required. Theoretical developments were validated in a laboratory using real power converters including a 75 kVA grid emulator where the two-area benchmark model is emulated and four 15 kVA CIGs operating in parallel connection. The applicability of the proposed controller was also explored for the IEEE 39-bus system. Highlights: Power oscillation damping controller that utilises both active and reactive powers. The control parameters are adjusted once the change in the system is detected. Adjustment mechanism based on simple expressions defined in off-line analysis. Theoretical developments verified in a laboratory with real hardware converters. The applicability of the proposed solution was examined using the IEEE 39-Bus system.