Emulation of Multi-Inverter Integrated Weak Grid via Interaction-Preserved Aggregation

Liao, Shuhan; Huang, Meng; Zha, Xiaoming; Guerrero, Josep M.

doi:10.1109/jestpe.2020.2988364

Cited by 9 publications

(2 citation statements)

References 27 publications

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“…First, this method divides each renewable energy power plant into one or several renewable energy source groups, each of which adopts the same control scheme. Next, each renewable energy source group can be equivalent to an equivalent source converter by capacity weighted average method [27]. For convenience, the equivalent source converter is denoted as ESC.…”

Section: B Modeling Of Hybrid Ac/dc Systems Based On Unified Three-po...mentioning

confidence: 99%

Modular Impedance Modeling and Stability Analysis of Hybrid AC/DC Power Systems With Grid-Forming and Grid-Following Converters

Liu,

Wang,

Sun

et al. 2024

IEEE Access

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The renewable energy resources integrating HVDC transmission systems, consisting of grid-following and grid-forming converters, have complex physical and control dynamic interactions. Although the impedance analysis method is advisable to study these interactions, impedance modeling is still challenging when taking various converter control schemes into account. This article proposes a modular three-port admittance modeling framework for the hybrid AC/DC power systems. This approach separates the modeling process into three levels: controller, converter, and system levels. The current and voltage feedback loops are subdivided into multiple submodules at the controller level, and the submodule connection method is proposed to obtain the small-signal model of the unified master controller, which thus can eliminate the repetitive work caused by the diversity of control schemes. Due to the modular modeling advantage, the method is also versatile and scalable, as well as using unlimited and expandable interconnecting. In addition, the modeling separates the entire system into three components, and the stability criterion of the hybrid AC/DC power systems is derived by regrouping their transfer function matrix models. Then, the proposed modeling method is applied to assess the stability of hybrid power plants integrating HVDC systems with grid-following and grid-forming sources. The conclusions can be used to plan GFM converter capacity in power System plants, the installation location of HVDC transmission systems, and other scenarios. Simulations are carried out to validate the correctness of the impedance modeling method and stability criterion. Finally, the effect of the different capacity ratios of grid-forming sources to renewable energy power plants on system stability is discussed.

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Section: B Modeling Of Hybrid Ac/dc Systems Based On Unified Three-po...mentioning

confidence: 99%

Modular Impedance Modeling and Stability Analysis of Hybrid AC/DC Power Systems With Grid-Forming and Grid-Following Converters

Liu,

Wang,

Sun

et al. 2024

IEEE Access

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“…A grid-connected converter typically interacts with the power grid in various time scales, as a result of the grid being coupled with a variety of devices such as synchronous generators, impedances of varying magnitudes and frequencies, and possibly other grid-connected converters [39]. In the representation shown in Fig.…”

Section: ) Converters Interactionmentioning

confidence: 99%

Circuits and Systems Issues in Power Electronics Penetrated Power Grid

Tse

Huang

Zhang

et al. 2020

IEEE Open J. Circuits Syst.

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The penetration of power electronics into power generation and distribution systems has deepened in recent years, as prompted by the increasing use of renewable sources, the quest for higher performance in the control of power conversion, as well as the increasing influence of economic plans that necessitate power trading among different regions or clusters of power distribution. As a result of the increased use of power electronics for controlling power flows in power systems, interactions of power electronics systems and conventional synchronous machines' dynamics would inevitably cause stability and robustness concerns, which can be readily understood by the coupling effects among interacting dynamical systems of varying stability margins (or transient performances). In this article, we present the various problems of power electronics penetration into power grids and the implications on the stability and robustness of power networks. We specifically attempt to bring together two distinct perspectives, namely, bottom-up (local) and top-down (global) perspectives, and examine the current progress and future direction of research in power systems amidst the extensive deployment of power electronics.INDEX TERMS Power grid, power electronics, grid-connected power electronics, robustness, stability.

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Optimization of the photovoltaic systems on the North Cameroon interconnected electrical grid

Kitmo

Tchaya

Djongyang

2021

Int J Energy Environ Eng

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Emulation of Multi-Inverter Integrated Weak Grid via Interaction-Preserved Aggregation

Cited by 9 publications

References 27 publications

Modular Impedance Modeling and Stability Analysis of Hybrid AC/DC Power Systems With Grid-Forming and Grid-Following Converters

Modular Impedance Modeling and Stability Analysis of Hybrid AC/DC Power Systems With Grid-Forming and Grid-Following Converters

Circuits and Systems Issues in Power Electronics Penetrated Power Grid

Optimization of the photovoltaic systems on the North Cameroon interconnected electrical grid

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