Stability of Small-Gain Closed-Loop System and Its Applications in VSC-Based DC/AC Power Systems

Wei, Du; Fu, Qiang; Wang, Haifeng

doi:10.1080/15325008.2019.1689455

Cited by 2 publications

(5 citation statements)

References 20 publications

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“…Therefore, the analysis above indicates that the state transformation and the aggregated inverter derived from Du et al (2020b) are just a special example of those in the current study about similar inverters in daisy-chain connection. Analysis and conclusions obtained from the special example in Du et al (2020c) cannot be simply extended to the case of inverters in daisy-chain connection.…”

Section: Aggregated Representationmentioning

confidence: 74%

“…State matrix of inverters in daisy-chain connected as given in Eq. 5 is much more complicated than and different to that derived from Du et al (2020b) because the configuration of a daisy-chain connection is completely different to that of a parallel connection.…”

Section: State Transformationmentioning

confidence: 97%

“…For the case of M similar inverters in parallel connection studied in Du et al (2020b), M dynamically independent subsystems are obtained after state transformation. Each of the first (M − 1) subsystems is a standalone inverter.…”

Section: Aggregated Representationmentioning

confidence: 99%

“…However, the study about the impact of an increasing number of grid-connected inverters relied on the results of numerical computation/simulation of study cases. Du et al (2020b) analytically examined the impact of the increasing number of parallel-connected PV generating units on system stability and came to the conclusion that the increase in the number can reduce system stability. The mechanism of growing oscillations caused by the increased number of the PV generating units in parallel connection was analytically revealed by Du et al (2020c).…”

Section: Introductionmentioning

confidence: 99%

“…The main contributions of the article, particularly as compared with previous work by Du et al (2020b), are as follows:…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Small-signal oscillatory stability of a grid-connected PV power generation farm affected by the increasing number of inverters in daisy-chain connection

Zhou¹,

Cao²,

Zhao³

2023

Front. Energy Res.

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The daisy-chain connection of inverters is one of the basic configurations of the power collecting network in a grid-connected photovoltaic (PV) power generation farm. In this study, the total impact of a cluster of M similar inverters in daisy-chain connection in the PV farm is examined in the following two aspects: 1) aggregated representation of the cluster of inverters is derived for stability study based on the dynamic equivalence. The derivation confirms the rationality of representing the cluster of inverters by an aggregated inverter connected to the external system via an equivalent reactance, which is the maximum eigenvalue of the matrix of daisy-chain connection defined in the article. 2) Analysis is conducted to indicate that the risk of oscillatory instability may be collectively induced by all the inverters in the daisy-chain connection in the cluster. This explains why the increasing number of inverters may imply the possible instability risk of a PV farm. An example of a power system with a grid-connected PV power generation farm is presented in the article to demonstrate and evaluate the analytical conclusion obtained.

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Section: Aggregated Representationmentioning

confidence: 74%

Section: State Transformationmentioning

confidence: 97%

Section: Aggregated Representationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The main contributions of the article, particularly as compared with previous work by Du et al (2020b), are as follows:…”

Section: Introductionmentioning

confidence: 99%