Control System for Multi-Inverter Parallel Operation in Uninterruptible Power Systems

Authors

  • Cesar A. Albugeri Federal University of Santa Catarina (UFSC), Electrical and Electronic Engineering Department, Florianópolis - SC, Brazil
  • Neilor C. Da Pont Federal University of Santa Catarina (UFSC), Electrical and Electronic Engineering Department, Florianópolis - SC, Brazil
  • Tiago K. Jappe Federal University of Santa Catarina (UFSC), Electrical and Electronic Engineering Department, Florianópolis - SC, Brazil
  • Samir A. Mussa Federal University of Santa Catarina (UFSC), Electrical and Electronic Engineering Department, Florianópolis - SC, Brazil
  • Telles B. Lazzarin Federal University of Santa Catarina (UFSC), Electrical and Electronic Engineering Department, Florianópolis - SC, Brazil

DOI:

https://doi.org/10.18618/REP.2019.1.0016

Keywords:

CAN, Parallel, PLL, VSI

Abstract

This paper proposes a network communication system applied in a control strategy for parallel-connected multi-inverters, which is based on a distributed control system and a redundant communication system. The control system is produced by a Phased-Locked Loop (PLL) synchronism algorithm, a voltage controller and a parallelism controller. All control systems are based on instantaneous values and in the parallelism control the inverters share a single voltage reference signal. The communication system, which is the main focus of the paper, is based on two buses: one analog, which is a measurement taken from the electrical grid; and one digital, comprised of a Controller Area Network (CAN). The former allows the reference voltage of all inverters to be in synchronism and the latter keeps the reference voltage in synchronism even during a grid power outage. There is a PLL algorithm in each Voltage Source Inverter (VSI), which ensures the synchronism between the internal reference and external signal received from the grid or from the CAN. The proposed networked control system was verified in three 5 kVA three-phase VSIs operating in parallel. Experimental results with static and dynamic tests and with electrical grid interruption and return, were obtained. The networked control system is redundant and it provides increased reliability, thus it can be applied in the parallel operation of an on-line Uninterruptible Power Supply (UPS).

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Author Biographies

Cesar A. Albugeri, Federal University of Santa Catarina (UFSC), Electrical and Electronic Engineering Department, Florianópolis - SC, Brazil

nascido em Joaçaba, Santa Catarina, Brasil, em 1990. Recebeu o grau de Engenheiro eletricista e mestre pela Universidade Federal de Santa Catarina (UFSC), Florianópolis, Brasil, em 2014 e 2016, respectivamente. Atualmente doutorando no programa de pós-graduação em Engenharia Elétrica da Universidade Federal de Santa Catarina (UFSC) e pesquisador no Instituto de Eletrônica de Potência (INEP).

Neilor C. Da Pont, Federal University of Santa Catarina (UFSC), Electrical and Electronic Engineering Department, Florianópolis - SC, Brazil

nasceu em 25/12/1989 em Criciúma-SC. Recebeu o grau de bacharel em engenharia elétrica (2015) e mestre em engenharia elétrica (2017) pela Universidade Federal de Santa Catarina (UFSC). Atualmente cursando doutorado pelo Programa de Pós-graduação em Engenharia Elétrica (PPGEEL) da UFSC, no Instituto de Eletrônica de Potência (INEP).

Tiago K. Jappe, Federal University of Santa Catarina (UFSC), Electrical and Electronic Engineering Department, Florianópolis - SC, Brazil

obteve o grau de Engenheiro eletricista pela Universidade Regional do Noroeste do Estado do Rio Grande do Sul (UNIJUÍ), Ijuí, Brasil, em 2006. Recebeu o grau de Mestre e Doutor em Engenharia Elétrica pela Universidade Federal de Santa Catarina (UFSC) em 2009 e 2015 respectivamente, na área de concentração em Eletrônica de Potência e Acionamento Elétrico. Atualmente, Dr. Jappe atua no centro de pesquisa e desenvolvimento da ON Semiconductor em Munique, Alemanha, com pesquisa direcionada ao uso de conversores estáticos em aplicaçesõ automotivas e fontes alternativas de energia.

Samir A. Mussa, Federal University of Santa Catarina (UFSC), Electrical and Electronic Engineering Department, Florianópolis - SC, Brazil

Recebeu o grau de Engenheiro eletricista pela Universidade Federal de Santa Maria em 1988, recebeu grau de Mestre e de Doutor pela Universidade Federal de Santa Catarina em 1994 e 2003 respectivamente e Pós Doutorado no Imperial College London, Inglaterra entre 2015 e 2016. Atualmente ocupa o cargo de professor no Departamento de Engenharia Elétrica e Eletrônica (EEL) da Universidade Federal de Santa Catarina (UFSC). Seus interesses de pesquisa incluem retificadores PFC, processamento de sinais digitais e controle aplicado em eletrônica de potência, sistemas baseados em DSP, FPGA e microprocessadores. Prof. Samir é membro da SOBRAEP e do IEEE.

Telles B. Lazzarin, Federal University of Santa Catarina (UFSC), Electrical and Electronic Engineering Department, Florianópolis - SC, Brazil

nasceu em Criciúma, Santa Catarina, Brasil, em 1979. Recebeu o grau de Engenheiro Eletricista, Mestre e Doutor em Engenharia Elétrica pela Universidade Federal de Santa Catarina (UFSC), Florianópolis, Brasil, em 2004, 2006 e 2010, respectivamente. Atualmente é professor no Departamento de Engenharia Elétrica e Eletrônica da UFSC. A área de concentração do Prof. Telles é em eletrônica de potência, com ênfase em energias renováveis (principalmente eólica de pequeno porte), inversores de tensão e conversores estáticos a capacitor chaveado. Prof. Telles é membro da SOBRAEP e do IEEE.

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Published

2019-03-31

How to Cite

[1]
C. A. Albugeri, N. C. D. Pont, T. K. Jappe, S. A. Mussa, and T. B. Lazzarin, “Control System for Multi-Inverter Parallel Operation in Uninterruptible Power Systems”, Eletrônica de Potência, vol. 24, no. 1, pp. 37–46, Mar. 2019.

Issue

Vol. 24 No. 1 (2019)

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Original Papers

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