Load-Independent Harmonic Mitigation in SCR-Fed Three-Phase Multiple Adjustable Speed Drive Systems with Deliberately Dispatched Firing Angles

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

213 Downloads (Pure)

Resumé

Adjustable speed drives (ASD) are widely used in industry for energy savings, where low-cost diode rectifiers are still employed as the front-ends, also for simplicity in control and reliability in operation. However, significant harmonics appear at the grid, which should be tackled according to standards and/or grid-connection rules. If not, a poor power quality will cause the efficiency of the entire system drop. Currently, communication technologies are still not very cost-effective for industrial harmonic control in multiple parallel motor-drive systems. Therefore, this study proposes a harmonic mitigation strategy for multiple ASD systems, where silicon-controlled rectifiers (SCR) with boost converters in the dc-link have been adopted to increase the harmonic-current controllability. More specific, the SCR firing angles are deliberately dispatched among the drive units, which results in certain phase shifts of the SCR currents on purpose. Consequently, the harmonics appearing in the grid current can be mitigated to some extent without communication. The effectiveness is independent of an individual SCR system loading when a number of drives are connected. Simulations are carried out to verify the discussion. Furthermore, to maximize the harmonic cancellation, a customised modulation scheme has been experimentally demonstrated. Both simulation and experimental results have confirmed the analysis.
OriginalsprogEngelsk
TidsskriftIET Power Electronics
Vol/bind11
Udgave nummer4
Sider (fra-til)727-734
Antal sider8
ISSN1755-4535
DOI
StatusUdgivet - apr. 2018

Fingerprint

Thyristors
Communication
Power quality
Controllability
Phase shift
Costs
Energy conservation
Diodes
Modulation
Industry

Citer dette

@article{4449b25eae594d6c968c93eed437b4a9,
title = "Load-Independent Harmonic Mitigation in SCR-Fed Three-Phase Multiple Adjustable Speed Drive Systems with Deliberately Dispatched Firing Angles",
abstract = "Adjustable speed drives (ASD) are widely used in industry for energy savings, where low-cost diode rectifiers are still employed as the front-ends, also for simplicity in control and reliability in operation. However, significant harmonics appear at the grid, which should be tackled according to standards and/or grid-connection rules. If not, a poor power quality will cause the efficiency of the entire system drop. Currently, communication technologies are still not very cost-effective for industrial harmonic control in multiple parallel motor-drive systems. Therefore, this study proposes a harmonic mitigation strategy for multiple ASD systems, where silicon-controlled rectifiers (SCR) with boost converters in the dc-link have been adopted to increase the harmonic-current controllability. More specific, the SCR firing angles are deliberately dispatched among the drive units, which results in certain phase shifts of the SCR currents on purpose. Consequently, the harmonics appearing in the grid current can be mitigated to some extent without communication. The effectiveness is independent of an individual SCR system loading when a number of drives are connected. Simulations are carried out to verify the discussion. Furthermore, to maximize the harmonic cancellation, a customised modulation scheme has been experimentally demonstrated. Both simulation and experimental results have confirmed the analysis.",
keywords = "Adjustable speed drives (ASDs), Multiple three-phase motor drives, Harmonic migitation, DC-link current modulation, Silicon-Controlled Rectifiers (SCR), Electronic inductors",
author = "Yongheng Yang and Pooya Davari and Frede Blaabjerg and Firuz Zare",
year = "2018",
month = "4",
doi = "10.1049/iet-pel.2016.0815",
language = "English",
volume = "11",
pages = "727--734",
journal = "IET Power Electronics",
issn = "1755-4535",
publisher = "Institution of Engineering and Technology",
number = "4",

}

Load-Independent Harmonic Mitigation in SCR-Fed Three-Phase Multiple Adjustable Speed Drive Systems with Deliberately Dispatched Firing Angles. / Yang, Yongheng; Davari, Pooya; Blaabjerg, Frede; Zare, Firuz.

I: IET Power Electronics, Bind 11, Nr. 4, 04.2018, s. 727-734.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Load-Independent Harmonic Mitigation in SCR-Fed Three-Phase Multiple Adjustable Speed Drive Systems with Deliberately Dispatched Firing Angles

AU - Yang, Yongheng

AU - Davari, Pooya

AU - Blaabjerg, Frede

AU - Zare, Firuz

PY - 2018/4

Y1 - 2018/4

N2 - Adjustable speed drives (ASD) are widely used in industry for energy savings, where low-cost diode rectifiers are still employed as the front-ends, also for simplicity in control and reliability in operation. However, significant harmonics appear at the grid, which should be tackled according to standards and/or grid-connection rules. If not, a poor power quality will cause the efficiency of the entire system drop. Currently, communication technologies are still not very cost-effective for industrial harmonic control in multiple parallel motor-drive systems. Therefore, this study proposes a harmonic mitigation strategy for multiple ASD systems, where silicon-controlled rectifiers (SCR) with boost converters in the dc-link have been adopted to increase the harmonic-current controllability. More specific, the SCR firing angles are deliberately dispatched among the drive units, which results in certain phase shifts of the SCR currents on purpose. Consequently, the harmonics appearing in the grid current can be mitigated to some extent without communication. The effectiveness is independent of an individual SCR system loading when a number of drives are connected. Simulations are carried out to verify the discussion. Furthermore, to maximize the harmonic cancellation, a customised modulation scheme has been experimentally demonstrated. Both simulation and experimental results have confirmed the analysis.

AB - Adjustable speed drives (ASD) are widely used in industry for energy savings, where low-cost diode rectifiers are still employed as the front-ends, also for simplicity in control and reliability in operation. However, significant harmonics appear at the grid, which should be tackled according to standards and/or grid-connection rules. If not, a poor power quality will cause the efficiency of the entire system drop. Currently, communication technologies are still not very cost-effective for industrial harmonic control in multiple parallel motor-drive systems. Therefore, this study proposes a harmonic mitigation strategy for multiple ASD systems, where silicon-controlled rectifiers (SCR) with boost converters in the dc-link have been adopted to increase the harmonic-current controllability. More specific, the SCR firing angles are deliberately dispatched among the drive units, which results in certain phase shifts of the SCR currents on purpose. Consequently, the harmonics appearing in the grid current can be mitigated to some extent without communication. The effectiveness is independent of an individual SCR system loading when a number of drives are connected. Simulations are carried out to verify the discussion. Furthermore, to maximize the harmonic cancellation, a customised modulation scheme has been experimentally demonstrated. Both simulation and experimental results have confirmed the analysis.

KW - Adjustable speed drives (ASDs)

KW - Multiple three-phase motor drives

KW - Harmonic migitation

KW - DC-link current modulation

KW - Silicon-Controlled Rectifiers (SCR)

KW - Electronic inductors

U2 - 10.1049/iet-pel.2016.0815

DO - 10.1049/iet-pel.2016.0815

M3 - Journal article

VL - 11

SP - 727

EP - 734

JO - IET Power Electronics

JF - IET Power Electronics

SN - 1755-4535

IS - 4

ER -