A predictive direct power control technique for transformerless grid connected PV systems application

Nima Safari; Osama Aslam Ansari; C. Y. Chung

doi:10.1109/EPEC.2016.7771688

A predictive direct power control technique for transformerless grid connected PV systems application

Nima Safari, Osama Aslam Ansari, C. Y. Chung

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

2 Citations (Scopus)

Abstract

Transformerless grid-connected PVs are more economical and efficient compared to transformer connected PVs; however, in this type of connection high leakage current flows between the PV arrays and the grid due to the parasitic capacitances of the system. This leakage current is one of the main culprits in causing electromagnetic interference in power system, saturation of distribution transformers and poses safety issues. Common mode voltage (CMV) is primarily responsible for the existence of this leakage current. To cope with issues which arise from omitting galvanic isolation (transformer), in this paper a predictive direct power control (PDPC) with reduced common voltage (CMV) called active zero predictive direct power control (AZ-PDPC) is proposed. Both theory and simulation show that the proposed method reduces the level of CMV along with general good performance. The proposed method's characteristics are compared with the PDPC technique.

Original language	English
Title of host publication	2016 IEEE Electrical Power and Energy Conference, EPEC 2016
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781509019199
DOIs	https://doi.org/10.1109/EPEC.2016.7771688
Publication status	Published - 5 Dec 2016
Externally published	Yes
Event	2016 IEEE Electrical Power and Energy Conference, EPEC 2016 - Ottawa, Canada Duration: 12 Oct 2016 → 14 Oct 2016

Publication series

Name	2016 IEEE Electrical Power and Energy Conference, EPEC 2016

Conference

Conference	2016 IEEE Electrical Power and Energy Conference, EPEC 2016
Country/Territory	Canada
City	Ottawa
Period	12/10/16 → 14/10/16

Keywords

Common mode voltage
leakage current
predictive direct power control model
reduced common mode voltage PWM
transformerless grid-connected PV

ASJC Scopus subject areas

Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment
Control and Optimization

More information

10.1109/EPEC.2016.7771688

Cite this

Safari, N., Ansari, O. A., & Chung, C. Y. (2016). A predictive direct power control technique for transformerless grid connected PV systems application. In 2016 IEEE Electrical Power and Energy Conference, EPEC 2016 Article 7771688 (2016 IEEE Electrical Power and Energy Conference, EPEC 2016). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EPEC.2016.7771688

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abstract = "Transformerless grid-connected PVs are more economical and efficient compared to transformer connected PVs; however, in this type of connection high leakage current flows between the PV arrays and the grid due to the parasitic capacitances of the system. This leakage current is one of the main culprits in causing electromagnetic interference in power system, saturation of distribution transformers and poses safety issues. Common mode voltage (CMV) is primarily responsible for the existence of this leakage current. To cope with issues which arise from omitting galvanic isolation (transformer), in this paper a predictive direct power control (PDPC) with reduced common voltage (CMV) called active zero predictive direct power control (AZ-PDPC) is proposed. Both theory and simulation show that the proposed method reduces the level of CMV along with general good performance. The proposed method's characteristics are compared with the PDPC technique.",

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author = "Nima Safari and Ansari, {Osama Aslam} and Chung, {C. Y.}",

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year = "2016",

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Safari, N, Ansari, OA & Chung, CY 2016, A predictive direct power control technique for transformerless grid connected PV systems application. in 2016 IEEE Electrical Power and Energy Conference, EPEC 2016., 7771688, 2016 IEEE Electrical Power and Energy Conference, EPEC 2016, Institute of Electrical and Electronics Engineers Inc., 2016 IEEE Electrical Power and Energy Conference, EPEC 2016, Ottawa, Canada, 12/10/16. https://doi.org/10.1109/EPEC.2016.7771688

A predictive direct power control technique for transformerless grid connected PV systems application. / Safari, Nima; Ansari, Osama Aslam; Chung, C. Y.
2016 IEEE Electrical Power and Energy Conference, EPEC 2016. Institute of Electrical and Electronics Engineers Inc., 2016. 7771688 (2016 IEEE Electrical Power and Energy Conference, EPEC 2016).

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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AU - Ansari, Osama Aslam

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PY - 2016/12/5

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N2 - Transformerless grid-connected PVs are more economical and efficient compared to transformer connected PVs; however, in this type of connection high leakage current flows between the PV arrays and the grid due to the parasitic capacitances of the system. This leakage current is one of the main culprits in causing electromagnetic interference in power system, saturation of distribution transformers and poses safety issues. Common mode voltage (CMV) is primarily responsible for the existence of this leakage current. To cope with issues which arise from omitting galvanic isolation (transformer), in this paper a predictive direct power control (PDPC) with reduced common voltage (CMV) called active zero predictive direct power control (AZ-PDPC) is proposed. Both theory and simulation show that the proposed method reduces the level of CMV along with general good performance. The proposed method's characteristics are compared with the PDPC technique.

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A predictive direct power control technique for transformerless grid connected PV systems application

Abstract

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Keywords

ASJC Scopus subject areas

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