On-line power system inertia calculation using wide area measurements. (July 2019)

• Record Type: Journal Article
• Authors: Sun, M.; Feng, Y.; Wall, P.; Azizi, S.; Yu, J.; Terzija, V.
• Is Part Of: International journal of electrical power & energy systems. Volume 109(2019)
• Page Start: 325
• Page End: 331
• Publication Date: 2019-07
• Subjects: Electro-mechanical transient processes -- Frequency -- Inertia -- Swing equation -- WAMPAC -- Nonlinear estimation -- Power system measurement -- Power system transients -- Testing; 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.2019.02.013
• Languages: English
• ISSNs: 0142-0615

Abstract

Highlights: A new effective approach of online power system inertia calculation is presented. An improved method of Estimation of the Rate of Frequency Change is proposed. It increases the awareness of the varied and reduced system inertia in future power system. The performance is validated by simulations, under laboratory conditions and real-life data. The method uses wide area monitoring data and can be part of application of WAMPC scheme. Abstract: Future developments in power systems, e.g. relatively larger generator sets, the virtual power plant and synthetic inertia concept and connection of generation assets over inverters, will cause the system inertia to vary significantly. During system operation, if the inertia of the system is significantly lower than anticipated at the planning stage, then the existing, deterministic protection and control may fail to ensure system stability. Therefore, the ability to accurately determine the inertia of individual system areas, and the system as a whole, online would be very useful. In this paper, an Inertia Calculation Application (ICA), which could be implemented as part of a Wide Area Monitoring Protection and Control scheme, is presented. The necessary wide area measurements must be processed during large disturbances to the active power balance of the system. The ICA has been validated by using computer simulations, under laboratory conditions and by using real-life data recorded by a transmission system operator.