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Inertia

About: Inertia is a research topic. Over the lifetime, 12006 publications have been published within this topic receiving 164291 citations.


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Journal ArticleDOI
TL;DR: In this article, a full visco-elastic non-linear beam with cubic nonlinearities is considered, and the governing equations of motion of the system for large amplitude vibrations are derived.

44 citations

Journal ArticleDOI
TL;DR: A novel technique for tapping the virtual inertia potential of RES (Photo Voltaic system), by cultivating the the derivative control mechanism and further improves the dynamic performance of the system.
Abstract: The microgrid system with a high share of Renewable Energy Sources (RES), is the need of hour. The RES provides clean, economical and never-ending active power support to the system. However, the inertia deficiency is the negative side of RES based systems, as it adversely affects the dynamic performance of the microgrid and may lead to severe consequences like loss of synchronization and instability. For addressing the issue of inertia deficiency, several techniques were already proposed for emulating the virtual inertia. Among these, the Derivative Control Technique (DCT) is quite popular, because of its simplicity and effectiveness. The previous research work utilizes the Energy Storage System (ESS) for providing virtual inertia support through DCT during load imbalance. However, such a system neglects the possibility of extracting virtual inertia support obtained from RES. This paper proposes a novel technique for tapping the virtual inertia potential of RES (Photo Voltaic system), by cultivating the the derivative control mechanism and further improves the dynamic performance of the system. Further, the efficiency of the proposed system is evaluated through time-domain simulations under different scenarios and compare it with conventional and ESS based systems.

44 citations

Proceedings ArticleDOI
TL;DR: In this paper, the moments of inertia, in yaw, pitch, and roll, as well as the center of gravity height are used to model the 3D dynamic behavior of vehicles before, during and after a collision.
Abstract: The moments of inertia, in yaw, pitch, and roll, as well as the center of gravity height are necessary to successfully model the three-dimensional (3D) dynamic behaviour of vehicles before, during and after collision A number of vehicle parameter estimation techniques have been developed and are currently in use in North America and Europe Many parameters have been measured by the National Highway Traffic Safety Administration (NHTSA) and others The estimation techniques are compared to the available measured values, and recommendations are made for best estimating the parameters when measured values are not available The sensitivity of 3D vehicle collision dynamics and trajectory simulation to variance in the moment of inertia is demonstrated (A) For the covering abstract of the conference see IRRD 899758

44 citations

Journal ArticleDOI
TL;DR: In this paper, a model reference control based inertia emulation strategy is proposed for diesel-wind systems, where a typical frequency response model with parametric inertia is set to be the reference model.
Abstract: Frequency performance has been a crucial issue for islanded microgrids. On the one hand, most distributed energy resources are converter-interfaced and do not inherently respond to frequency variations. On the other hand, current inertia emulation approach cannot provide guaranteed response. In this paper, a model reference control based inertia emulation strategy is proposed for diesel-wind systems. Desired inertia can be precisely emulated through the proposed strategy. A typical frequency response model with parametric inertia is set to be the reference model. A measurement at a specific location delivers the information about the disturbance acting on the diesel-wind system to the reference model. The objective is for the speed of the diesel generator to track the reference so that the desired inertial response is realized. In addition, polytopic parameter uncertainty will be considered. The control strategy is configured in different ways according to different operating points. The parameters of the reference model are scheduled to ensure adequate frequency response under a predefined worst case. The controller is implemented in a nonlinear three-phase diesel-wind system fed microgrid using the Simulink software platform. The results show that exact synthetic inertia can be emulated and adequate frequency response is achieved.

44 citations

Journal ArticleDOI
TL;DR: In this paper a closed-form solution to the differential equation describing frequency dynamics is proposed, which allows to obtain frequency-security algebraic constraints to be implemented in optimization routines.
Abstract: A reduced level of system inertia due to renewable integration increases the need for cost-effective provision of ancillary services, such as Frequency Response (FR). In this paper a closed-form solution to the differential equation describing frequency dynamics is proposed, which allows to obtain frequency-security algebraic constraints to be implemented in optimization routines. This is done while considering any finite number of FR services with distinguished characteristics, such as different delivery times and activation delays. The problem defined by these frequency-security constraints can be formulated as a Mixed-Integer Second-Order Cone Program (MISOCP), which can be efficiently handled by off-the-shelf conic optimization solvers. This paper also takes into account the uncertainty in inertia contribution from the demand side by formulating the frequency-security conditions as chance constraints, for which an exact convex reformulation is provided. Finally, case studies highlighting the effectiveness of this frequency-secured formulation are presented.

44 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023886
20221,975
2021443
2020562
2019609
2018566