Line Inductance Stability Operation Domain Assessment for Weak Grids with Multiple Constant Power Loads

Wang Rui; Sun Qiuye; Ma Dazhong; Qin Dehao; Gui Yonghao; Wang Peng

doi:10.1109/TEC.2020.3021070

Line Inductance Stability Operation Domain Assessment for Weak Grids with Multiple Constant Power Loads

Wang Rui, Sun Qiuye, Ma Dazhong, Qin Dehao, Gui Yonghao, Wang Peng

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Weak grids are gaining considerable attention since power generation resources are remote from constant power loads (CPLs), which results in low-frequency/harmonic oscillation. Meanwhile, due to the play, and plug demand of modern power system, the line inductance of weak grids often changes, which is also regarded as the variation regarding short circuit ratio (SCR). Based on this, the conventional impedance-based stability operation point assessment approaches should be expanded into stability domain assessment approach considering the line inductance variation. Therefore, the stability-oriented line inductance stability domain assessment approach for weak grids with CPLs is proposed in this paper. Firstly, the source impedance matrix of weak grid, and load admittance matrix of CPLs are separately built. Secondly, an improved stability forbidden domain criterion is proposed through related mapping transformation process, which has lower conservatism than two previous improved stability criteria. Thirdly, the improved stability forbidden domain criterion is switched into the condition that the intermediate matrices are Hurwitz. Meanwhile, the line inductance stability domain is directly obtained through these intermediate matrices, and guardian map theory. Finally, the simulation, and experiment results illustrate that the proposed approach has less conservatism, and high efficiency.

Original language	English
Article number	9185076
Pages (from-to)	1045-1055
Number of pages	11
Journal	IEEE Transactions on Energy Conversion
Volume	36
Issue number	2
DOIs	https://doi.org/10.1109/TEC.2020.3021070
State	Published - Jun 2021
Externally published	Yes

Funding

Manuscript received March 21, 2020; revised May 22, 2020 and June 30, 2020; accepted August 30, 2020. Date of publication September 2, 2020; date of current version May 21, 2021. This work was supported by National Key Research, and Development Program of China under Grant 2018YFA0702200. Paper no. TEC-00295-2020. (Corresponding authors: Sun Qiuye; Ma Dazhong.) Wang Rui is with the Northeastern University, Liaoning 110819, China, and also with the Nanyang Technological University, Singapore 637141, Singapore (e-mail: [email protected]).

Funders	Funder number
National Key Research and Development Program of China	TEC-00295-2020, 2018YFA0702200

Keywords

Weak grid
guardian map theory
intermediate matrix
stability domain

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10.1109/TEC.2020.3021070

Cite this

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title = "Line Inductance Stability Operation Domain Assessment for Weak Grids with Multiple Constant Power Loads",

abstract = "Weak grids are gaining considerable attention since power generation resources are remote from constant power loads (CPLs), which results in low-frequency/harmonic oscillation. Meanwhile, due to the play, and plug demand of modern power system, the line inductance of weak grids often changes, which is also regarded as the variation regarding short circuit ratio (SCR). Based on this, the conventional impedance-based stability operation point assessment approaches should be expanded into stability domain assessment approach considering the line inductance variation. Therefore, the stability-oriented line inductance stability domain assessment approach for weak grids with CPLs is proposed in this paper. Firstly, the source impedance matrix of weak grid, and load admittance matrix of CPLs are separately built. Secondly, an improved stability forbidden domain criterion is proposed through related mapping transformation process, which has lower conservatism than two previous improved stability criteria. Thirdly, the improved stability forbidden domain criterion is switched into the condition that the intermediate matrices are Hurwitz. Meanwhile, the line inductance stability domain is directly obtained through these intermediate matrices, and guardian map theory. Finally, the simulation, and experiment results illustrate that the proposed approach has less conservatism, and high efficiency.",

keywords = "Weak grid, guardian map theory, intermediate matrix, stability domain",

author = "Wang Rui and Sun Qiuye and Ma Dazhong and Qin Dehao and Gui Yonghao and Wang Peng",

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AU - Qiuye, Sun

AU - Dazhong, Ma

AU - Dehao, Qin

AU - Yonghao, Gui

AU - Peng, Wang

PY - 2021/6

Y1 - 2021/6

N2 - Weak grids are gaining considerable attention since power generation resources are remote from constant power loads (CPLs), which results in low-frequency/harmonic oscillation. Meanwhile, due to the play, and plug demand of modern power system, the line inductance of weak grids often changes, which is also regarded as the variation regarding short circuit ratio (SCR). Based on this, the conventional impedance-based stability operation point assessment approaches should be expanded into stability domain assessment approach considering the line inductance variation. Therefore, the stability-oriented line inductance stability domain assessment approach for weak grids with CPLs is proposed in this paper. Firstly, the source impedance matrix of weak grid, and load admittance matrix of CPLs are separately built. Secondly, an improved stability forbidden domain criterion is proposed through related mapping transformation process, which has lower conservatism than two previous improved stability criteria. Thirdly, the improved stability forbidden domain criterion is switched into the condition that the intermediate matrices are Hurwitz. Meanwhile, the line inductance stability domain is directly obtained through these intermediate matrices, and guardian map theory. Finally, the simulation, and experiment results illustrate that the proposed approach has less conservatism, and high efficiency.

AB - Weak grids are gaining considerable attention since power generation resources are remote from constant power loads (CPLs), which results in low-frequency/harmonic oscillation. Meanwhile, due to the play, and plug demand of modern power system, the line inductance of weak grids often changes, which is also regarded as the variation regarding short circuit ratio (SCR). Based on this, the conventional impedance-based stability operation point assessment approaches should be expanded into stability domain assessment approach considering the line inductance variation. Therefore, the stability-oriented line inductance stability domain assessment approach for weak grids with CPLs is proposed in this paper. Firstly, the source impedance matrix of weak grid, and load admittance matrix of CPLs are separately built. Secondly, an improved stability forbidden domain criterion is proposed through related mapping transformation process, which has lower conservatism than two previous improved stability criteria. Thirdly, the improved stability forbidden domain criterion is switched into the condition that the intermediate matrices are Hurwitz. Meanwhile, the line inductance stability domain is directly obtained through these intermediate matrices, and guardian map theory. Finally, the simulation, and experiment results illustrate that the proposed approach has less conservatism, and high efficiency.

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Line Inductance Stability Operation Domain Assessment for Weak Grids with Multiple Constant Power Loads

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