Journal ArticleDOI
Dynamic equivalencing of distribution networks with dispersed generation using Hankel norm approximation
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TLDR
In this article, a brief review of existing techniques for aggregation and order-reduction of distribution networks with dispersed generators is provided, and the dynamic reduction using Hankel norm approximation is performed for a 10 kV distribution network, which includes DG of different types.Abstract:
Nowadays the number of dispersed generators (DGs) is growing rapidly. This change will greatly influence power system dynamics. A distribution network, where DGs are connected to the grid, cannot be considered as passive anymore. Therefore, in the future it will not be possible to use simple equivalents of distribution networks for power system dynamic modelling, as it was done before. At the same time, the whole power system cannot generally be represented in a detailed manner for dynamic studies because of huge system dimension. Therefore special techniques have to be applied for aggregation and order-reduction of distribution networks with DG. A brief review of existing techniques is provided here, and the dynamic reduction using Hankel norm approximation is performed for a 10 kV distribution network, which includes DG of different types.read more
Citations
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Proceedings ArticleDOI
A new order reduction approach based on elementary operation for Roesser state-space model
TL;DR: In this paper, a new order reduction approach for Roesser state-space model of multidimensional (n-D) systems based on the elementary operation order reduction (EOOR) approach was proposed.
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A data‐driven inertia adequacy‐based approach for sustainable expansion planning in distributed generations‐penetrated power grids
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General Modelling Method for the Active Distribution Network with Multiple Types of Renewable Distributed Generations
TL;DR: In this article , a general equivalent model is developed for the ADN with a significant amount of DGs, based on a two-step modelling method, motivated by the dynamic similarities between the doubly-fed induction generator (DFIG)-based wind turbines, direct drive permanent magnet synchronous generator (DDPMSG) based wind turbines and photovoltaic (PV) generation.
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A Voltage Sensitivity Based Equivalent for Active Distribution Networks Containing Grid Forming Converters
TL;DR: In this paper , a gray-box method for aggregating active distribution networks containing grid forming converters is proposed, which utilizes voltage sensitivities to represent the grid's strength at the grid forming converter's connection point.
Dissertation
Dynamic Aggregation of Grid-tied Inverters
TL;DR: In this paper, a reduced-order aggregated model for parallel-connected grid-tied three-phase inverters is formulated and a necessary and sufficient set of parametric relationships are derived to ensure that the reducedorder models for an arbitrary number of such paralleled inverters have the same model order and structure as any single inverter.
References
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All optimal Hankel-norm approximations of linear multivariable systems and their L, ∞ -error bounds†
TL;DR: In this paper, a complete characterization of all rational functions that minimize the Hankel-norm is derived, and the solution to the latter problem is via results on balanced realizations, all-pass functions and the inertia of matrices, all in terms of the solutions to Lyapunov equations.
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Model Reduction for Control System Design
TL;DR: In this article, model and controller reduction based on Coprime Factorization (CF) is proposed for low-order controller design, where the model is reduced by multiplicative approximation and the controller is reduced based on time factorization.
Journal ArticleDOI
Development of models for analyzing the load-following performance of microturbines and fuel cells
Y. Zhu,Kevin Tomsovic +1 more
TL;DR: In this article, the authors presented simplified slow dynamic models for microturbines and fuel cells and evaluated their stand-alone dynamic performances in a distribution system embedded with a micro-turbine plant and an integrated fuel cell power plant.
Journal ArticleDOI
Identification of Coherent Generators for Dynamic Equivalents
TL;DR: In this article, the authors describe the development and evaluation of a method for identifying the coherency behavior of generators for various power system disturbances and use this information as a basis for forming dynamic equivalents which can be applied in transient stability studies.