PQ-U control method of grid-connected PV inverter under weak grid

Liu Guihua; Guo Lei; Tao Hailiang; Zhu Xiaohui; Wang Wei

doi:10.1109/ITEC-AP.2017.8080888

PQ-U control method of grid-connected PV inverter under weak grid

Liu Guihua
, Guo Lei
, Tao Hailiang
, Zhu Xiaohui
, Wang Wei

School of Electrical Engineering and Automation, Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Scopus citations

Abstract

Under the condition of low short circuit capacity and high grid impedance of weak grid, the grid voltage is easily fluctuated due to the load change, affecting the power quality of the grid. In view of this problem, firstly, this paper analyzes the principle of the grid-connected voltage change caused by the load change. Secondly, an improved voltage-power control method (PQ-U) for three-phase grid-connected PV inverter is proposed. This method changes the output reactive power of PV inverter to maintain the stability of the bus voltage when the inductive or capacitive load changes significantly. Besides, the advantages of PQ-U control method relative to traditional PQ control method are compared and analyzed by Matlab software. The simulation results show that PQ-U control method can maintain the stability of bus voltage in inductive or capacitive load significant change and play a supporting role for weak grid voltage. Finally, experiments are done to verify the validity of the PQ-U control method.

Original language	English
Title of host publication	2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781538628942
DOIs	https://doi.org/10.1109/ITEC-AP.2017.8080888
State	Published - 23 Oct 2017
Externally published	Yes
Event	2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017 - Harbin, China Duration: 7 Aug 2017 → 10 Aug 2017

Publication series

Name	2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017

Conference

Conference	2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017
Country/Territory	China
City	Harbin
Period	7/08/17 → 10/08/17

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

PQ-U control
Three-phase grid-connected inverter
Weak grid

Access to Document

10.1109/ITEC-AP.2017.8080888

Cite this

Guihua, L., Lei, G., Hailiang, T., Xiaohui, Z., & Wei, W. (2017). PQ-U control method of grid-connected PV inverter under weak grid. In 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017 Article 8080888 (2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ITEC-AP.2017.8080888

Guihua, Liu ; Lei, Guo ; Hailiang, Tao et al. / PQ-U control method of grid-connected PV inverter under weak grid. 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017. Institute of Electrical and Electronics Engineers Inc., 2017. (2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017).

@inproceedings{948d2f23657e46ac8eccc987001493e8,

title = "PQ-U control method of grid-connected PV inverter under weak grid",

abstract = "Under the condition of low short circuit capacity and high grid impedance of weak grid, the grid voltage is easily fluctuated due to the load change, affecting the power quality of the grid. In view of this problem, firstly, this paper analyzes the principle of the grid-connected voltage change caused by the load change. Secondly, an improved voltage-power control method (PQ-U) for three-phase grid-connected PV inverter is proposed. This method changes the output reactive power of PV inverter to maintain the stability of the bus voltage when the inductive or capacitive load changes significantly. Besides, the advantages of PQ-U control method relative to traditional PQ control method are compared and analyzed by Matlab software. The simulation results show that PQ-U control method can maintain the stability of bus voltage in inductive or capacitive load significant change and play a supporting role for weak grid voltage. Finally, experiments are done to verify the validity of the PQ-U control method.",

keywords = "PQ-U control, Three-phase grid-connected inverter, Weak grid",

author = "Liu Guihua and Guo Lei and Tao Hailiang and Zhu Xiaohui and Wang Wei",

note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017 ; Conference date: 07-08-2017 Through 10-08-2017",

year = "2017",

month = oct,

day = "23",

doi = "10.1109/ITEC-AP.2017.8080888",

language = "英语",

series = "2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

booktitle = "2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017",

address = "美国",

}

Guihua, L, Lei, G, Hailiang, T, Xiaohui, Z & Wei, W 2017, PQ-U control method of grid-connected PV inverter under weak grid. in 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017., 8080888, 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017, Institute of Electrical and Electronics Engineers Inc., 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017, Harbin, China, 7/08/17. https://doi.org/10.1109/ITEC-AP.2017.8080888

PQ-U control method of grid-connected PV inverter under weak grid. / Guihua, Liu; Lei, Guo; Hailiang, Tao et al.
2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017. Institute of Electrical and Electronics Engineers Inc., 2017. 8080888 (2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - PQ-U control method of grid-connected PV inverter under weak grid

AU - Guihua, Liu

AU - Lei, Guo

AU - Hailiang, Tao

AU - Xiaohui, Zhu

AU - Wei, Wang

PY - 2017/10/23

Y1 - 2017/10/23

N2 - Under the condition of low short circuit capacity and high grid impedance of weak grid, the grid voltage is easily fluctuated due to the load change, affecting the power quality of the grid. In view of this problem, firstly, this paper analyzes the principle of the grid-connected voltage change caused by the load change. Secondly, an improved voltage-power control method (PQ-U) for three-phase grid-connected PV inverter is proposed. This method changes the output reactive power of PV inverter to maintain the stability of the bus voltage when the inductive or capacitive load changes significantly. Besides, the advantages of PQ-U control method relative to traditional PQ control method are compared and analyzed by Matlab software. The simulation results show that PQ-U control method can maintain the stability of bus voltage in inductive or capacitive load significant change and play a supporting role for weak grid voltage. Finally, experiments are done to verify the validity of the PQ-U control method.

AB - Under the condition of low short circuit capacity and high grid impedance of weak grid, the grid voltage is easily fluctuated due to the load change, affecting the power quality of the grid. In view of this problem, firstly, this paper analyzes the principle of the grid-connected voltage change caused by the load change. Secondly, an improved voltage-power control method (PQ-U) for three-phase grid-connected PV inverter is proposed. This method changes the output reactive power of PV inverter to maintain the stability of the bus voltage when the inductive or capacitive load changes significantly. Besides, the advantages of PQ-U control method relative to traditional PQ control method are compared and analyzed by Matlab software. The simulation results show that PQ-U control method can maintain the stability of bus voltage in inductive or capacitive load significant change and play a supporting role for weak grid voltage. Finally, experiments are done to verify the validity of the PQ-U control method.

KW - PQ-U control

KW - Three-phase grid-connected inverter

KW - Weak grid

UR - https://www.scopus.com/pages/publications/85040120347

U2 - 10.1109/ITEC-AP.2017.8080888

DO - 10.1109/ITEC-AP.2017.8080888

M3 - 会议稿件

AN - SCOPUS:85040120347

T3 - 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017

BT - 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017

Y2 - 7 August 2017 through 10 August 2017

ER -

Guihua L, Lei G, Hailiang T, Xiaohui Z, Wei W. PQ-U control method of grid-connected PV inverter under weak grid. In 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017. Institute of Electrical and Electronics Engineers Inc. 2017. 8080888. (2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017). doi: 10.1109/ITEC-AP.2017.8080888

PQ-U control method of grid-connected PV inverter under weak grid

Abstract

Publication series

Conference

UN SDGs

Keywords

Access to Document

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