Mitigating voltage variations caused by the anti-islanding protection of distributed generator via voltage regulator TAP control

• Grant number: 15/04147-1
• Support Opportunities: Scholarships in Brazil - Master
• Effective date (Start): June 01, 2015
• Effective date (End): May 31, 2017
• Field of knowledge: Engineering - Electrical Engineering - Power Systems
• Acordo de Cooperação: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: José Carlos de Melo Vieira Júnior
• Grantee: Daniel Ferreira Lima
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

The connection of distributed generators in an electric power system should be evaluated carefully to ensure that they effectively assist in improving the performance of electrical networks, reducing or eliminating any situations that cause degradation of the power quality of the consumers, and other issues. In this context, there are several studies that analyze the influence of synchronous generators connected to distribution systems and how they affect the frequency, cause variations in voltage magnitude, voltage unbalance and harmonic distortion. However, there are a few studies analyzing the effects that the disconnection of distributed generators induces to the power quality of consumers. Once operating in parallel with the distribution network, these generators have an effect on voltage variations and voltage regulator devices. As a result, disconnection can cause severe voltage variations causing damage or malfunction to the loads, especially to the most voltage-sensitive ones. The disconnection may be sudden or due to the action of anti-islanding protection, followed by the procedure to reconnect the substation, if it is possible. In order to study this problem, which tends to become a new power quality concern for electric utilities, and in order to minimize and/ or eliminate the possible side effects of the voltage variations, this research project proposes the development of a control method of voltage regulators' TAPS. In this method, the control of TAPS will be modeled as an optimization problem which will aim to combat any negative effect that these voltage variations can cause to distribution systems. (AU)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

LIMA, Daniel Ferreira. Mitigating voltage variations caused by the anti-islanding protection of distributed generator via voltage regulator tap control. 2017. Master's Dissertation - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) São Carlos.