Single stationary domain equivalent inverter admittance for three‐phase grid‐inverter system considering the interaction between grid and inverter

Zou, Xiaoming; Du, Xiong; Wang, Guoning; Tai, Heng–Ming

doi:10.1049/iet-pel.2018.5856

Cited by 7 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Y eq is the output admittance of the inverter, which is to be measured. It can be expressed as [32] Y eq ( p…”

Section: Proposed Impedance Measurement Methodsmentioning

confidence: 99%

“…

Y_{e q}

is the output admittance of the inverter, which is to be measured. It can be expressed as [32]

\begin{matrix} true \\ right Y_{e q} ((), ω_{p}) = Y_{p} ((), ω_{p}) - \frac{J_{n} ((), 2 ω_{0} - ω_{p}) J_{p} ((), ω_{p})}{Z_{g}^{*} {(2 ω_{0} - ω_{p})}^{- 1} + Y_{n} ((), 2 ω_{0} - ω_{p})} . \end{matrix}

…”

Section: Proposed Impedance Measurement Methodsmentioning

confidence: 99%

“…In fact,

Y_{e q 0}

can be expressed as [32]

\begin{matrix} true \\ right Y_{e q 0} ((), ω_{p}) = Y_{p} ((), ω_{p}) - \frac{J_{n} ((), 2 ω_{0} - ω_{p}) J_{p} ((), ω_{p})}{Z_{g}^{*} {(2 ω_{0} - ω_{p})}^{- 1} + Y_{n} ((), 2 ω_{0} - ω_{p})} . \end{matrix}

…”

Section: Proposed Impedance Measurement Methodsmentioning

confidence: 99%

“…It can be seen from ( 6) with ( 5) that the single impedance measurement represents only one entry in the impedance matrix. Ignorance of other entries leads to inaccurate stability analysis of the inverter-grid system in some cases [20,32].…”

Section: Impedance Measurement In the Stationary Framementioning

confidence: 99%

See 3 more Smart Citations

A new impedance measurement method and its application to stability analysis of the inverter‐grid system

Liu

Song

et al. 2021

IET Renewable Power Gen

Self Cite

View full text Add to dashboard Cite

Grid-connected inverter have been extensively used in the renewable energy grid-connect systems, such as solar and wind. Interaction between the grid and the inverter may generate harmonic resonances that lead to reduced power quality and even instability. To analyse the stability of the inverter-grid system using impedance-based stability criterion, inverter impedance has to be known. Impedance measurement in the dq-domain requires the precise synchronous phase angle to obtain accurate measurement. For impedance measurement in the stationary frame, inaccuracy usually results from not considering the effects of grid impedance and the frequency coupling. A new impedance measurement method in the stationary frame is proposed to obtain accurate measurement. The proposed method takes into account the grid impedance and its interaction with the inverter. Thus, it overcomes the limitations of current impedance measurement methods. More important, the proposed method enables accurate stability analysis results, whereas current methods may fail. Simulation and experimental results are presented to demonstrate the effectiveness of the proposed measurement method.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

“…Y eq is the output admittance of the inverter, which is to be measured. It can be expressed as [32] Y eq ( p…”

Section: Proposed Impedance Measurement Methodsmentioning

confidence: 99%

“…

Y_{e q}

is the output admittance of the inverter, which is to be measured. It can be expressed as [32]

\begin{matrix} true \\ right Y_{e q} ((), ω_{p}) = Y_{p} ((), ω_{p}) - \frac{J_{n} ((), 2 ω_{0} - ω_{p}) J_{p} ((), ω_{p})}{Z_{g}^{*} {(2 ω_{0} - ω_{p})}^{- 1} + Y_{n} ((), 2 ω_{0} - ω_{p})} . \end{matrix}

…”

Section: Proposed Impedance Measurement Methodsmentioning

confidence: 99%

“…In fact,

Y_{e q 0}

can be expressed as [32]

\begin{matrix} true \\ right Y_{e q 0} ((), ω_{p}) = Y_{p} ((), ω_{p}) - \frac{J_{n} ((), 2 ω_{0} - ω_{p}) J_{p} ((), ω_{p})}{Z_{g}^{*} {(2 ω_{0} - ω_{p})}^{- 1} + Y_{n} ((), 2 ω_{0} - ω_{p})} . \end{matrix}

…”

Section: Proposed Impedance Measurement Methodsmentioning

confidence: 99%

Section: Impedance Measurement In the Stationary Framementioning

confidence: 99%

See 2 more Smart Citations

A new impedance measurement method and its application to stability analysis of the inverter‐grid system

Liu

Song

et al. 2021

IET Renewable Power Gen

Self Cite

View full text Add to dashboard Cite

show abstract

“…Stability analysis can be performed using the Nyquist criterion for the impedance ratio between source and load [10,11]. Most of the impedance models for the renewable energy generators are derived for a specific steady-state operating point [7][8][9][10][11][12]. In the renewable energy grid-connected system, the operating point varies regularly according to the environmental conditions such as wind speed and solar irradiance [13,14].…”

Section: Introductionmentioning

confidence: 99%

New analysis on two‐variable converter impedance model in grid‐connected systems

Song

Sun

Liu

et al. 2021

IET Renewable Power Gen

Self Cite

View full text Add to dashboard Cite

This paper presents an in-depth analysis for the two-variable impedance model of a gridconnected system. The two-variable model describes the impedance using the frequency as well as the operating point variable. The impedance-based stability analysis method cannot be directly applied because the conventional models are derived for a specific steady-state operating point and the operating point varies during operation. Thus, this paper develops a new analysis method to shed light on the role the two-variable model plays instability analysis. The proposed method not only analyzes the system stability at different operating points, but also enables the controller design to ensure system stability. Experimental results are presented to demonstrate the effectiveness of the proposed method.

show abstract

A Discussion of Eigenvalue-based and Impedance- based Methods in VSC System

Lü

Wang³

2021

2021 IEEE 4th International Electrical and Energy Conference (CIEEC)

View full text Add to dashboard Cite

Single stationary domain equivalent inverter admittance for three‐phase grid‐inverter system considering the interaction between grid and inverter

Cited by 7 publications

References 21 publications

A new impedance measurement method and its application to stability analysis of the inverter‐grid system

A new impedance measurement method and its application to stability analysis of the inverter‐grid system

New analysis on two‐variable converter impedance model in grid‐connected systems

A Discussion of Eigenvalue-based and Impedance- based Methods in VSC System

Contact Info

Product

Resources

About