Full-variable speed wind generator protection considering an energy storage system connection and island mode operation

• Grant number: 17/13752-1
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• Effective date (Start): September 01, 2017
• Effective date (End): November 30, 2017
• Field of knowledge: Engineering - Electrical Engineering - Power Systems
• Principal Investigator: Denis Vinicius Coury
• Grantee: Rodrigo Pavanello Bataglioli
• Supervisor: Olimpo Anaya-Lara
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Research place: University of Strathclyde, Scotland
• Associated to the scholarship: 15/24028-7 - Real time simulation and protection of wind generators in the Smart Grids context, BP.MS

Abstract

Considering abnormal operating conditions and electrical faults to which the Electric Power System (EPS) may be subjected, the protection of its elements is very important. Among the equipments to be protected, the generators are highlighted, because they represent a high investment cost and the fact that unscheduled stoppages result in financial losses and cause impact on the operation of an EPS. Thus, based on literature, it is observed that there are no comprehensive studies and standards for individual protection of Synchronous Generators (SGs) applied to wind power generation. Therefore, it is necessary to study and analyse the behavior of wind turbines subject to fault situations, knowing that the protection scheme is dependent on the generator type and the way it is connected to the EPS. In the smart grids context, the possibility of island operation and the presence of energy storage systems connected to the grid will change the dynamic of fault situations. In order to study this issue, this research proposes to include a energy storage system to operate with the wind generator in a complementary way, smoothing the power output and making the Wind Energy Conversion System (WECS) strong enough to operate in the island mode. The methodology establishes several fault types to investigate the wind turbine behavior in such conditions, considering the smart grid context aforementioned. To conduct such simulations, a Real Time Digital Simulator (RTDS) are used. This equipment allows the reproduction of a real electrical system, as well as closed loop simulations for testing and evaluating the adjusted protection system. Improvements concerning the protection functions are intended, as an adaptive characteristic might be necessary for the island mode operation. Results obtained up to this time focus on the development of a protection scheme considering only a SG connected to the EPS through a 3-level back-to-back converter based on Voltage Source Converters (VSCs). (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BATAGLIOLI, RODRIGO P.; MONARO, RENATO M.; COURY, DENIS V.; ANAYA-LARA, OLIMPO. Wind generator protection with ESSs considering grid connected and island mode operations. INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS, v. 126, n. B, MAR 2021. (17/09554-0, 17/13752-1, 15/24028-7)