Results 31 to 40 of about 67,464 (300)
Active diffusers : some prototypes and 2D measurements [PDF]
, 2005 Diffusing devices are used to improve room acoustics in a wide variety of applications. The dispersion generated by current diffuser technologies is often limited to mid-to-high frequencies because low-frequency diffusers are usually too large to be ...
Avis, MR, Cox, TJ, Xiao, L
core +2 more sources
Multi-terminal HVDC grids with inertia mimicry capability [PDF]
, 2016 The high-voltage multi-terminal dc (MTDC) systems are foreseen to experience an important development in the next years. Currently, they have appeared to be a prevailing technical and economical solution for harvesting offshore wind energy. In this study,
Gharehpetian, Gevorg B. +4 more
core +2 more sources
Adaptive Virtual Impedance Droop Control Based on Consensus Control of Reactive Current
Energies, 2018 It is difficult to achieve accurate distribution of reactive power based on conventional droop control due to the line impedance mismatch in an islanded microgrid.
Zhilin Lyu +4 more
doaj +1 more source
VSG Control Strategy Incorporating Voltage Inertia and Virtual Impedance for Microgrids
Energies, 2020 Virtual synchronous generator (VSG) control lacks voltage inertia and powerful decoupling capabilities. The voltage of the distributed generator (DG) unit controlled by the VSG will be easily affected by power fluctuations and high-frequency noise, and ...
Zipeng Ke +6 more
doaj +1 more source
IEEE Transactions on Smart Grid, 2022 An islanded microgrid (MG) including low-inertia converter-based distributed generations (DGs) is subjected to instability. The virtual inertia concept was proposed to alleviate the stability issues by imitating the synchronous generators behavior. This paper spotlights on the optimization of virtual synchronous generator (VSG) parameters and virtual ...
Bahram Pournazarian +4 more
openaire +2 more sources
Geometric Scattering in Robotic Telemanipulation [PDF]
, 2002 In this paper, we study the interconnection of two robots, which are modeled as port-controlled Hamiltonian systems through a transmission line with time delay. There will be no analysis of the time delay, but its presence justifies the use of scattering
Mashke, Bernhard +3 more
core +5 more sources
Presynchronous Grid-Connection Strategy of Virtual Synchronous Generator Based on Virtual Impedance [PDF]
Mathematical Problems in Engineering, 2020 The virtual synchronous generator (VSG) technology of inverter is widely used to provide the inertia and damping support for power system. However, an additional measurement device PLL (phase-locked loop) is required in the virtual synchronous generator grid connection to track the voltage phase, amplitude, and frequency, which restricts the flexible ...
Guanfeng Zhang +3 more
openaire +1 more source
Frontiers in Energy Research, 2022 The microgrid (MG) ensures a reliable power supply as it can work in a grid-independent mode. This mode requires a coordinated control strategy among distributed generators (DGs). One major challenge in a grid-independent MG is the reactive power-sharing
Suchitra D +6 more
doaj +1 more source
Active distribution power system with multi-terminal DC links [PDF]
, 2015 A fast power restoration operational scheme and relevant stabilizing control is proposed for active distribution power systems with multi-terminal DC network in replacement of the conventional normal open switches. A 9-feeder benchmark distribution power
Chen, Dong, Xu, Lie, Zhang, Wendian
core +2 more sources
Study of a virtual-impedance of the capacitor-series inverter for wider accurate power control range
Energy Reports, 2022 A droop control method with virtual-impedance for capacitor-series inverter (CSI) is studied in this paper. Compared with the traditional inverters, CSI has more merits in low-cost reactive power compensation.
Wenyang Deng +4 more
doaj +1 more source