Smart voltage-source inverter with a novel approach to enhance neutral current compensation

Fida Hasan Md Rafi, M. Jahangir Hossain, Graham Town, Juwei Lu

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The presence of neutral current is quite common in three-phase four-wire distribution systems due to unequal distribution of linear and nonlinear single-phase loads. However, high neutral current can overload the neutral conductor, which can cause electrical safety concerns at the installation terminals. Among neutral current compensators, the three-phase four-leg voltage source inverter (VSI) provides better control flexibility and efficient performance than the passive compensators, but requires a higher VSI capacity. To provide a solution to the aforementioned problem, this paper presents a novel control method to utilize the available capacity of a three-phase four-leg (3P-4L) VSI after active and reactive power regulation to enhance the neutral current compensation. A smart (S) VSI is designed to operate with renewable energy sources and minimize the neutral current. Case studies are conducted using commercial building actual load data in PSCAD/EMTDC software environment. The system with the proposed control method can provide improvement in the neutral current compensation, phase balancing and unbalance factor compared to a fixed capacity 3P-4L SVSI. Experimental results using a TMS320F28335 DSP microcontroller and modified Semiteach 3P-4L inverter are presented to verify the robustness of the controllers and enhancement in the neutral current compensation using the proposed capacity control method.

LanguageEnglish
Pages3518-3529
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Volume66
Issue number5
Early online date20 Jul 2018
DOIs
Publication statusPublished - May 2019

Fingerprint

Electric potential
Microcontrollers
Reactive power
Robustness (control systems)
Wire
Controllers
Compensation and Redress

Keywords

  • commercial load
  • low voltage (LV) network
  • neutral current
  • three-phase four-leg smart voltage-source inverter (3P-4L SVSI)
  • three-phase four-wire (3P-4W) network

Cite this

@article{6c2867edef20428c9d78cd69709ac8a5,
title = "Smart voltage-source inverter with a novel approach to enhance neutral current compensation",
abstract = "The presence of neutral current is quite common in three-phase four-wire distribution systems due to unequal distribution of linear and nonlinear single-phase loads. However, high neutral current can overload the neutral conductor, which can cause electrical safety concerns at the installation terminals. Among neutral current compensators, the three-phase four-leg voltage source inverter (VSI) provides better control flexibility and efficient performance than the passive compensators, but requires a higher VSI capacity. To provide a solution to the aforementioned problem, this paper presents a novel control method to utilize the available capacity of a three-phase four-leg (3P-4L) VSI after active and reactive power regulation to enhance the neutral current compensation. A smart (S) VSI is designed to operate with renewable energy sources and minimize the neutral current. Case studies are conducted using commercial building actual load data in PSCAD/EMTDC software environment. The system with the proposed control method can provide improvement in the neutral current compensation, phase balancing and unbalance factor compared to a fixed capacity 3P-4L SVSI. Experimental results using a TMS320F28335 DSP microcontroller and modified Semiteach 3P-4L inverter are presented to verify the robustness of the controllers and enhancement in the neutral current compensation using the proposed capacity control method.",
keywords = "commercial load, low voltage (LV) network, neutral current, three-phase four-leg smart voltage-source inverter (3P-4L SVSI), three-phase four-wire (3P-4W) network",
author = "Rafi, {Fida Hasan Md} and Hossain, {M. Jahangir} and Graham Town and Juwei Lu",
year = "2019",
month = "5",
doi = "10.1109/TIE.2018.2856188",
language = "English",
volume = "66",
pages = "3518--3529",
journal = "IEEE Transactions on Industrial Electronics",
issn = "0278-0046",
publisher = "Institute of Electrical and Electronics Engineers",
number = "5",

}

Smart voltage-source inverter with a novel approach to enhance neutral current compensation. / Rafi, Fida Hasan Md; Hossain, M. Jahangir; Town, Graham; Lu, Juwei.

In: IEEE Transactions on Industrial Electronics, Vol. 66, No. 5, 05.2019, p. 3518-3529.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Smart voltage-source inverter with a novel approach to enhance neutral current compensation

AU - Rafi, Fida Hasan Md

AU - Hossain, M. Jahangir

AU - Town, Graham

AU - Lu, Juwei

PY - 2019/5

Y1 - 2019/5

N2 - The presence of neutral current is quite common in three-phase four-wire distribution systems due to unequal distribution of linear and nonlinear single-phase loads. However, high neutral current can overload the neutral conductor, which can cause electrical safety concerns at the installation terminals. Among neutral current compensators, the three-phase four-leg voltage source inverter (VSI) provides better control flexibility and efficient performance than the passive compensators, but requires a higher VSI capacity. To provide a solution to the aforementioned problem, this paper presents a novel control method to utilize the available capacity of a three-phase four-leg (3P-4L) VSI after active and reactive power regulation to enhance the neutral current compensation. A smart (S) VSI is designed to operate with renewable energy sources and minimize the neutral current. Case studies are conducted using commercial building actual load data in PSCAD/EMTDC software environment. The system with the proposed control method can provide improvement in the neutral current compensation, phase balancing and unbalance factor compared to a fixed capacity 3P-4L SVSI. Experimental results using a TMS320F28335 DSP microcontroller and modified Semiteach 3P-4L inverter are presented to verify the robustness of the controllers and enhancement in the neutral current compensation using the proposed capacity control method.

AB - The presence of neutral current is quite common in three-phase four-wire distribution systems due to unequal distribution of linear and nonlinear single-phase loads. However, high neutral current can overload the neutral conductor, which can cause electrical safety concerns at the installation terminals. Among neutral current compensators, the three-phase four-leg voltage source inverter (VSI) provides better control flexibility and efficient performance than the passive compensators, but requires a higher VSI capacity. To provide a solution to the aforementioned problem, this paper presents a novel control method to utilize the available capacity of a three-phase four-leg (3P-4L) VSI after active and reactive power regulation to enhance the neutral current compensation. A smart (S) VSI is designed to operate with renewable energy sources and minimize the neutral current. Case studies are conducted using commercial building actual load data in PSCAD/EMTDC software environment. The system with the proposed control method can provide improvement in the neutral current compensation, phase balancing and unbalance factor compared to a fixed capacity 3P-4L SVSI. Experimental results using a TMS320F28335 DSP microcontroller and modified Semiteach 3P-4L inverter are presented to verify the robustness of the controllers and enhancement in the neutral current compensation using the proposed capacity control method.

KW - commercial load

KW - low voltage (LV) network

KW - neutral current

KW - three-phase four-leg smart voltage-source inverter (3P-4L SVSI)

KW - three-phase four-wire (3P-4W) network

UR - http://www.scopus.com/inward/record.url?scp=85050396312&partnerID=8YFLogxK

U2 - 10.1109/TIE.2018.2856188

DO - 10.1109/TIE.2018.2856188

M3 - Article

VL - 66

SP - 3518

EP - 3529

JO - IEEE Transactions on Industrial Electronics

T2 - IEEE Transactions on Industrial Electronics

JF - IEEE Transactions on Industrial Electronics

SN - 0278-0046

IS - 5

ER -