The AC-DC Energy Nodes (ADENs) concept offers a transformative approach to modernizing power grids, particularly in the context of supergrids. By centralizing power flows from diverse renewable energy sources, such as...
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Moving target defense (MTD) is a promising approach to defend against load redistribution attacks on the internet-of-things (IoT)-based smart grid networks by probing the distorted state estimates with the distributed...
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The AC-DC Energy Nodes (ADENs) concept offers a transformative approach to modernizing power grids, particularly in the context of supergrids. By centralizing power flows from diverse renewable energy sources, such as...
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ISBN:
(数字)9798350377170
ISBN:
(纸本)9798350377187
The AC-DC Energy Nodes (ADENs) concept offers a transformative approach to modernizing power grids, particularly in the context of supergrids. By centralizing power flows from diverse renewable energy sources, such as offshore wind farms, ADENs enable efficient long-distance power transmission through HVDC technology. This design enhances the balance of supply and demand across regions and countries, significantly improving grid stability and resilience. However, the implementation of ADENs presents substantial technical, regulatory, and cybersecurity challenges. This study delves into these challenges while also addressing the geopolitical complexities of transnational connections, underscoring the critical importance of policy alignment for successful deployment.
In this paper we consider large-scale composite nonconvex optimization problems having the objective function formed as a sum of three terms, first has block coordinate-wise Lipschitz continuous gradient, second is tw...
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In the present study, the Volterra series theory is adopted to theoretically investigate the force transmissibility of multiple degrees of freedom （MDOF） structures, in which an isolator with nonlinear anti-symmetri...
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In the present study, the Volterra series theory is adopted to theoretically investigate the force transmissibility of multiple degrees of freedom （MDOF） structures, in which an isolator with nonlinear anti-symmetric viscous damping is assembled. The results reveal that the anti-symmetric nonlinear viscous damping can significantly reduce the force trans- missibility over all resonance regions for MDOF structures with little effect on the transmissibility over non-resonant and isolation regions. The results indicate that the vibration isolators with an anti-symmetric damping characteristic have great potential to solve the dilemma occurring in the design of linear viscously damped vibration isolators where an increase of the damping level reduces the force transmissibility over resonant frequencies but increases the transmissibility over non-resonant frequency regions. This work is an extension of a previous study in which MDOF structures installed on the mount through an isolator with cubic nonlinear damping are considered. The theoretical analysis results are also verified by simulation studies.
Driver drowsiness electroencephalogram (EEG) signal monitoring can promptly alert drivers of their drowsiness in edge-end Consumer Electronics (CE), thereby reducing the probability of traffic accidents. Graph convolu...
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Short circuit fault occurrence in high-voltage DC (HVDC) systems causes extremely high currents in a fast raising time that does not experience current zero-crossing. To protect HVDC systems/grids against fault curren...
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Short circuit fault occurrence in high-voltage DC (HVDC) systems causes extremely high currents in a fast raising time that does not experience current zero-crossing. To protect HVDC systems/grids against fault current, fast HVDC breaker is an essential equipment. This study presents the design procedure of a novel HVDC breaker based on solid-state controllable reactor which is able to reduce the fault current's rate of rise and fault current amplitude to less than grid nominal current in the breaking process. The main achievement of the proposed HVDC breaker is that not only breaker does not encounter fault current, but also none of the series HVDC equipment is influenced by the fault. The designed breaker performance is studied by PSCAD/EMTPS, and then the simulation results are validated by the developed laboratory experimental setup.
The goal of this study is to investigate torque profiles of each active joint in sit-to-stand (SiSt) mode arm free and with seesaw exercise machine. This paper considers the development of a dynamic humanoid model for...
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Unwanted vibration affects light weight flexible structures leading to problems such as fatigue, instability and performance reduction. Structural vibration further leads to noise nuisance problems when coupled with a...
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ISBN:
(纸本)9781615677368
Unwanted vibration affects light weight flexible structures leading to problems such as fatigue, instability and performance reduction. Structural vibration further leads to noise nuisance problems when coupled with acoustic fields. Thus, controlling vibration is of practical importance so as to reduce its influence on the environment. In this paper, a flexible plate structure is utilised as a platform to assess the performance of an active vibration control (AVC) mechanism developed in this work based on a recursive least squares (RLS) algorithm with directional forgetting factor (DFF). The system employs a single input and single output (SISO) control configuration, and this is realised within the Matlab/Simulink environment. A model-based control design approach, incorporating identification of the system model based on DFF-RLS algorithm is carried out. Three different excitation signals, namely finite duration step, random and pseudo random binary signal (PRBS), are used as test signals. The investigations concentrate on the first five resonance modes of the structure, and assess the ability of the developed controllers in attenuating the deflection of the plate structure. The performance of the AVC system is presented in both time and frequency domains. Simulation results reveal that the RLS algorithm with directional forgetting factor can achieve better results in controlling the vibration in flexible plate structures in comparison to RLS with constant forgetting factor.
This paper presents the development of physiological and mathematical model of muscle extension and flexion induced by functional electrical stimulation (FES) for indoor rowing exercise. Three segmental models with ni...
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