Analytical tools to assess the voltage stability of induction-based distributed generators

• Published in: International journal of electrical power & energy systems Vol. 36; no. 1; pp. 31 - 39
• Main Authors: Grilo, A.P., Meira, P.C.M., Vieira, J.C.M., Freitas, W., Bansal, R.C.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-03-2012; Elsevier
• Subjects: Applied sciences; Direct energy conversion and energy accumulation; Disturbances. Regulation. Protection; Electric power plants; Electrical engineering. Electrical power engineering; Electrical power engineering; Embedded generation; Exact sciences and technology; High voltage or high current generators; Induction generator; Maximum output power; Miscellaneous; Power networks and lines; Various equipment and components; Voltage stability; Wind power; Voltage stability; Induction generator; Maximum output power; Embedded generation; Wind power; Autonomous system; Output power; Asynchronous generators; Cage induction machine; Power system stability; Wind energy; Output voltage; Equivalent circuit; Stability limit; System simulation; Electric power production
• ISSN: 0142-0615; 1879-3517
• DOI: 10.1016/j.ijepes.2011.10.020

► A method is presented to analyse the steady-state behaviour of induction generators. ► The method can be used to identify voltage stability issues of induction generators. ► The method can be used to assess the maximum output power of induction generators.
The installation of induction distributed generators should be preceded by a careful study in order to determine if the point of common coupling is suitable for transmission of the generated power, keeping acceptable power quality and system stability. In this sense, this paper presents a simple analytical formulation that allows a fast and comprehensive evaluation of the maximum power delivered by the induction generator, without losing voltage stability. Moreover, this formulation can be used to identify voltage stability issues that limit the generator output power. All the formulation is developed by using the equivalent circuit of squirrel-cage induction machine. Simulation results are used to validate the method, which enables the approach to be used as a guide to reduce the simulation efforts necessary to assess the maximum output power and voltage stability of induction generators.