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- 2019
- photovoltaic power generation system
- sensitivity analysis
- Monte Carlo
- fuzzy layering evaluation method
- Electrical Engineering and Automation
- Xi’an Jiaotong University
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Multi-diagnostic setup to investigate the two-close-frequency phenomena
摘要： While the mechanism is still not fully clear, the beneficial effect (higher intensity of highly charged ions, stable plasma conditions) of the second microwave injected to the ECR plasma was observed in many laboratories, both with close and far frequencies. Due to the complexity of the phenomena (e.g. interaction of resonant zones, damped instabilities) complex diagnostic methods are demanded to understand its mechanism better and to fully exploit the potential hidden in it. It is a challenging task since complex diagnostics methods require the arsenal of diagnostic tools to be installed to a relatively small size plasma chamber. Effect of the injected second 13.6–14.6 GHz microwave to the 14.25 GHz basic plasma has been investigated by means of soft and (time-resolved) hard X-ray spectroscopy, by X-ray imaging and space-resolved spectroscopy and by probing the rf signals emitted by the plasma. Concerning the characterization of the X radiation, in order to separate the source and position of different X-ray photons special metallic materials for the main parts of the plasma chamber were chosen. A detailed description and explanation of the full experimental setup and the applied non-invasive diagnostics tools and its roles are presented in this paper.
关键词： Ion sources (positive ions, negative ions, electron cyclotron resonance (ECR), electron beam (EBIS)),X-ray detectors,Plasma diagnostics - interferometry, spectroscopy and imaging,Plasma generation (laser-produced, RF, x ray-produced)
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE Canadian Conference on Electrical & Computer Engineering (CCECE) - Quebec, QC, Canada (2018.5.13-2018.5.16)] 2018 IEEE Canadian Conference on Electrical & Computer Engineering (CCECE) - Accommodating High Penetration of PV in Distribution Networks Considering Smart Curtailment
摘要： This paper presents an approach for photo-voltaic based DG allocation in distribution networks. The objective of the proposed approach is to minimize the developer’s investment cost associated with energy supply requirements over predefined planning period. Uncertainties associated with supply and demand are considered in this work, as well as, the uncertainty associated with energy prices. In addition, this work introduces smart curtailment of renewable resources, which can maximize the penetration and minimize the overall investment. Simulation results on a typical distribution network are provided, which prove the effectiveness and robustness of the proposed resource allocation approach.
关键词： distributed generation,renewable resources,probability density function,genetic algorithms,smart grids
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Chengdu, China (2018.3.26-2018.3.28)] 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Investigation of Corner Singularity in Conformal FDTD Structured Mesh Generation Based on Ray Tracing
摘要： Corner singularity in finite-difference time-domain (FDTD) method indicates the incorrect conformal area computed from the intersection information by tangential situation. Tangential situation ray originates from a mesh line aligning on an aligned plane, which leads to the fuzzification of intersection length along Yee grid edge. The intersection position of two perpendicular aligned planes or an aligned plane with arbitrary plane is the position of possible corner singularity, from which the incorrect computed conformal area may result. A universal scheme to solve the corner singularity problem is proposed. By utilizing the in or out information normal to the tangential plane, as well as cell position relation relative to the tangential plane, we can determine whether or not to modify the length of the tangential side of Yee cell for computing the conformal area. A simple numerical example of a hollow rectangular waveguide shows the necessity for handling corner singularity.
关键词： tangential situation,conformal,structured mesh generation,corner singularity,ray tracing,FDTD
更新于2025-09-09 09:28:46
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Precision Measurement of Magnetic Field Based on Second-Order Sideband Generation in a Hybrid Electromagnetic-Optomechanical System
摘要： Realizing the precise measurement of the magnetic field is of great significance in many fields, including optics, metrology, bioscience, and engineering technology. With the development of nanophotonics, optomechanical systems have provided an on-chip platform to explore new availability for high-sensitivity measurement due to its extreme sensitivity on weak force [Ref. Nat. Nanotechnol. 7, 509 (2012)]. In this paper, a theoretical scheme for precision measurement of magnetic field based on a nonlinear optomechanical effect: second-order sideband generation in a hybrid electromagnetic-optomechanical system is proposed. We find that the system exhibits a kenspeckle magnetic-field-dependent generation of the frequency component at the second-order sideband, which is more sensitive than the previous paper based on optomechanically induced transparency. Numerical calculations show that the measurement accuracy of the magnetic field in our scheme may reach the order of nT or even smaller, so our findings will provide a more accurate solution for the precise measurement of magnetic fields.
关键词： second-order sideband generation,Precise measurement,cavity optomechanics,magnetic field
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE International Conference on Smart Energy Grid Engineering (SEGE) - Oshawa, ON (2018.8.12-2018.8.15)] 2018 IEEE International Conference on Smart Energy Grid Engineering (SEGE) - Effects of Centralized Battery Storage Placement in Low-Voltage Residential Distribution Networks with High Photovoltaic Penetration
摘要： In this paper, power flow simulation is used to investigate how centralized battery storage can aide in mitigating under-voltage conditions in highly PV penetrated residential network. It also investigates how the placement of the battery storage relates to the rating of the storage used. It is found the reduction in storage rating is quadratically proportional to the distance along the low-voltage distribution feeder.
关键词： photovoltaic generation,voltage regulation,battery storage,low-voltage networks
更新于2025-09-09 09:28:46
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[IEEE 2018 2nd International Conference on Engineering Innovation (ICEI) - Bangkok, Thailand (2018.7.5-2018.7.6)] 2018 2nd International Conference on Engineering Innovation (ICEI) - Forecasting Self-Consumption Solar Power Capacity of Industry and Business Sector in Thailand: a System Dynamic Model
摘要： The future of solar Photovoltaic (PV) technology is bright. Not only solar PV is a clean energy but also has its price dropped and has its efficiency improved significantly since 1975. Thus, investing in solar PV is feasible and attractive nowadays. In Thailand, industrial and business sector are the largest power consumers which have an opportunity to reduce electricity cost and promote Corporate Social Responsibility (CSR) by using solar PV. So, installing solar PV as Isolated Power Supply system (IPS) of companies in the industrial sector reduces electricity consumption from the grid. This would cause a problem in demand forecasting for electricity in the grid. Through a questionnaire survey, this research aims to develop a system dynamic model to understand the dynamic behavior of factors that affect the solar PV capacity, and forecast the monthly solar PV capacity growth from 2018 to 2022 of the industry and business sector in Thailand.
关键词： Electricity generation capacity,System dynamics,Solar PV,Forecasting
更新于2025-09-09 09:28:46
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Carbonized daikon for high efficient solar steam generation
摘要： Steam generation by e?cient utilization of solar energy is a promising strategy in seawater desalination and industrial wastewater treatment. Daikon, a cheap and scaled available crop, was chosen as raw material which was subjected to a carbonization process. The carbonized daikon possesses highly developed honeycomb cellular structure providing numerous interconnected channels. The close-packed pores act as photon traps leading to enhanced solar absorption of more than 95.5% in the visible region and more than 93.5% in the near infrared region. The excellent hydrophilic nature and the interconnected channels of the carbonized daikon provide strong capillary force for the quick transport of water. As a result, under one-sun irradiation, the carbonized daikon delivers a water evaporation rate of 1.57 kg m?2 h?1 and a solar steam e?ciency of 85.9%. The carbonized daikon also shows great performance toward water evaporation from seawater and contaminated water, realizing the separation of water from pollutants and indicating its application versatility.
关键词： Steam generation,Vapor-liquid interface,Fresh water,Solar thermal conversion,Carbonized daikon
更新于2025-09-09 09:28:46
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High-harmonic generation from solids
摘要： High-harmonic generation in atomic gases has been studied for decades, and has formed the basis of attosecond science. Observation of high-order harmonics from bulk crystals was, however, reported much more recently, in 2010. This Review surveys the subsequent efforts aimed at understanding the microscopic mechanism of solid-state harmonics in terms of what it can tell us about the electronic structure of the source materials, how it can be used to probe driven ultrafast dynamics and its prospects for novel, compact short-wavelength light sources. Although most of this work has focused on bulk materials as the source, recent experiments have investigated high-harmonic generation from engineered structures, which could form flexible platforms for attosecond photonics.
关键词： ultrafast dynamics,electronic structure,high-harmonic generation,solids,short-wavelength light sources,attosecond science
更新于2025-09-09 09:28:46
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Anapole Resonances Facilitated by High Index Contrast between Substrate and Dielectric Nanodisk Enhance Vacuum Ultraviolet Generation
摘要： Anapole modes are known to be excited only in high-index nanoparticles. Here we show that the nanodisks made of dielectric materials with much lower refractive indices, such as LiNbO3, can generate anapole modes, provided that they are supported by metallic or near-zero-index substrate. The important parameter for exciting anapole mode is the index contrast between nanodisk and substrate, rather than the refractive index of the nanodisk. We numerically demonstrate highly efficient coherent generation of vacuum ultraviolet with the efficiency higher than 10-2 % based on the second-harmonic generation via the excitation of anapole modes in LiNbO3 nanodisks supported by aluminum substrate. Highly efficient vacuum ultraviolet nanosource proposed in this work can find important applications for spectroscopic and sensing purposes at the nanoscale.
关键词： Second-harmonic generation (SHG),Anapole mode,Refractive index,Nanodisks,Vacuum ultraviolet (VUV)
更新于2025-09-09 09:28:46
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Vortex Dynamics and Optical Vortices || Ultrashort Extreme Ultraviolet Vortices
摘要： Optical vortices are very attractive because they transport a well-defined orbital angular momentum (OAM) associated with the singularity of the beam. These singular beams, commonly generated in the optical regime, are used in a wide range of applications: communication, micromanipulation, microscopy, among others. The production of OAM beams in the extreme ultraviolet (XUV) and X-ray regimes is of great interest as it allows to extend the applications of optical vortices down to the nanometric scale. Several proposals have been explored in order to generate XUV vortices in synchrotrons and FEL facilities. Here, we study the generation of XUV vortices through high-order harmonic generation (HHG). HHG is a unique source of coherent radiation extending from the XUV to the soft X-ray regime, emitted in the form of attosecond pulses. When driving HHG by OAM beams, highly charged XUV vortices with unprecedented spatiotemporal properties are emitted in the form of helical attosecond beams. In this chapter, we revise our theoretical work in the generation of XUV vortices by HHG. In particular, we illustrate in detail the role of macroscopic phase matching of high-order harmonics when driven by OAM beams, which allows to control the production of attosecond beams carrying OAM.
关键词： attosecond helical beams,ultrafast phenomena,orbital angular momentum,attosecond pulses,extreme ultraviolet vortices,high harmonic generation,nonlinear optics,phase matching
更新于2025-09-09 09:28:46