Resource Type

Journal Article 149

Conference Videos 4

Year

2023 3

2022 12

2021 11

2020 10

2019 6

2018 7

2017 8

2016 8

2015 27

2014 8

2013 8

2012 6

2011 6

2010 6

2009 8

2008 4

2007 4

2005 4

2004 5

2002 1

open ︾

Keywords

smart grid 7

Smart grid 6

vector control 3

Artificial intelligence 2

Direct power control 2

Distributed optimization 2

Power grid 2

active and reactive power 2

active power 2

aluminum alloy 2

distribution grid 2

doubly fed induction generator (DFIG) 2

phasor measurement unit (PMU) 2

power factor unity 2

power grid 2

reactive power 2

smart grid (SG) 2

transient stability 2

3D printing 1

open ︾

Search scope:

排序： Display mode:

Transient performance comparison of grid-forming converters with different FRT control strategies

Frontiers in Energy 2023, Volume 17, Issue 2,   Pages 239-250 doi: 10.1007/s11708-022-0856-2

Abstract: Grid-forming converters (GFMs) are faced with the threat of transient inrush current and synchronizationinstability issues when subjected to grid faults.Instead of disconnecting from the grid unintentionally, GFMs are required to have fault ride through(FRT) capability to maintain safe and stable operation in grid-connected mode during grid fault periodsdistinguishing features and that are feasible for different operation conditions have been proposed for GFMs

Keywords： grid-forming converters (GFMs)     fault ride through (FRT)     transient stability     transient inrush current    

HTML PDF Collect

A comprehensive review of wind power based power system frequency regulation

Frontiers in Energy 2023, Volume 17, Issue 5,   Pages 611-634 doi: 10.1007/s11708-023-0876-6

Abstract: Wind power (WP) is considered as one of the main renewable energy sources (RESs) for future low-carbon and high-cost-efficient power system. However, its low inertia characteristic may threaten the system frequency stability of the power system with a high penetration of WP generation. Thus, the capability of WP participating in the system frequency regulation has become a research hotspot. In this paper, the impact of WP on power system frequency stability is initially presented. In addition, various existing control strategies of WP participating in frequency regulation are reviewed from the wind turbine (WT) level to the wind farm (WF) level, and their performances are compared in terms of operating principles and practical applications. The pros and cons of each control strategy are also discussed. Moreover, the WP combing with energy storage system (ESS) for system frequency regulation is explored. Furthermore, the prospects, future challenges, and solutions of WP participating in power system frequency regulation are summarized.

Keywords： frequency regulation strategies     wind turbine generators     grid-forming control     model predictive control    

HTML PDF Collect

Modeling and control of photovoltaic energy conversion connected to the grid

Rebei NAJET, Ben Ghanem BELGACEM, Hasnaoui OTHMAN

Frontiers in Energy 2012, Volume 6, Issue 1,   Pages 35-46 doi: 10.1007/s11708-012-0169-y

Abstract: This paper presents modeling and control of a photovoltaic generator (PVG) connected to the grid.The electrical energy from a PVG is transferred to the grid via two static converters (DC/DC and DC/AC

Keywords： photovoltaic generator (PVG)     maximum power point tracker     grid-connected     static converters    

HTML PDF Collect

Hierarchical control for parallel bidirectional power converters of a grid-connected DC microgrid Article

Hui-yong HU, Yong-gang PENG, Yang-hong XIA, Xiao-ming WANG, Wei WEI, Miao YU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 12,   Pages 2046-2057 doi: 10.1631/FITEE.1601497

Abstract: The DC microgrid is connected to the AC utility by parallel bidirectional power converters (BPCs) toimport/export large power, whose control directly affects the performance of the grid-connected DC microgridIn this paper, we propose a hierarchical control for parallel BPCs of a grid-connected DC microgrid.The proposed hierarchical control is applied for parallel BPCs of a grid-connected DC microgrid and can

Keywords： Parallel bidirectional power converters     Hierarchical control     DC microgrid    

HTML PDF Collect

Analysis and control of wind-driven self-excited induction generators connected to the grid through powerconverters

S. Senthil KUMAR, N. KUMARESAN, N. Ammasai GOUNDEN, Namani RAKESH

Frontiers in Energy 2012, Volume 6, Issue 4,   Pages 403-412 doi: 10.1007/s11708-012-0208-8

Abstract: The analysis of the wind-driven self-excited induction generators (SEIGs) connected to the grid throughpower converters has been developed in this paper.For this analysis, a method of representing the grid power as equivalent load resistance in the steady-state(DBR) and a line commutated inverter (LCI) between the generator terminals and three-phase utility gridthrough power converters has been demonstrated by experiments and simulation.

Keywords： self-excited induction generator (SEIG)     renewable power generation     power converters     maximum power point    

HTML PDF Collect

Finite element simulations of sheet metal forming under complex strain paths

CHEN Wei, YANG Jichang, WU Xiaofeng, LU Dun, GUO Weigang

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 399-403 doi: 10.1007/s11465-007-0069-8

Abstract: Fracture is a common defect in sheet metal forming and it is essentially caused by tensile instabilityThis paper analyzes some experiments and theories for building forming limit diagrams of sheet metalthis, a method that integrates the finite element simulation and experiment was used to research the formingFinally, the forming method of the rear hanger is confirmed.complex strain paths and different strain paths will have great impacts on the result of the sheet metal forming

Keywords： dangerous     forming method     different     hanger     forming    

HTML PDF Collect

Digital high-efficiency print forming method and device for multi-material casting molds

Zhongde SHAN, Zhi GUO, Dong DU, Feng LIU, Wenjiang LI

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 328-337 doi: 10.1007/s11465-019-0574-6

Abstract: This study proposes a novel high-efficiency print forming method and device for multi-material castingThe proposed method is specifically related to the integrated forming of two-way coating and printingThese processes can realize the high-efficiency print forming of high-performance sand molds.The integrated forming method for layered heating and roller compaction presented in this study effectively

Keywords： multi-material casting mold     3D printing     efficient print forming method    

HTML PDF Collect

Near-field radiative thermoelectric energy converters: a review

Eric TERVO, Elham BAGHERISERESHKI, Zhuomin ZHANG

Frontiers in Energy 2018, Volume 12, Issue 1,   Pages 5-21 doi: 10.1007/s11708-017-0517-z

Abstract: Radiative thermoelectric energy converters, which include thermophotovoltaic cells, thermoradiative cellsThe development and state of the art of these near-field converters are discussed in detail, and remaining

Keywords： energy conversion systems     luminescent refrigeration     near-field radiation     thermophotovoltaic     thermoradiative cell    

HTML PDF Collect

Formation mechanism and modeling of surface waviness in incremental sheet forming

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0679-1

Abstract: Improving and controlling surface quality has always been a challenge for incremental sheet forming (

Keywords： surface waviness     incremental sheet forming     numerical simulation     formation mechanism     deformation history    

HTML PDF Collect

FEM-based strain analysis study for multilayer sheet forming process

Rongjing ZHANG,Lihui LANG,Rizwan ZAFAR

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4,   Pages 373-379 doi: 10.1007/s11465-015-0371-9

Abstract: Different forming modes such as wrinkling and fracture are discussed by using experimental and numericalHydroforming is used for multilayer forming.

Keywords： finite element method (FEM)     strain analysis     multilayer sheet forming    

HTML PDF Collect

Hybrid forming mechanism of patternless casting and laser cladding

Zhongde SHAN, Fuzhen SUN, Yang LIU

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 4,   Pages 393-401 doi: 10.1007/s11465-019-0550-1

Abstract: In accordance with the requirement of manufacturing dies quickly and economically, a hybrid forming methodAn experimental study is conducted on the hybrid forming process and its trial production and application

Keywords： patternless casting     laser cladding     hybrid forming     rapid tooling    

HTML PDF Collect

Highlight yield forming and innovative technologies in tropical crops

Wenquan WANG

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 4,   Pages 283-284 doi: 10.15302/J-FASE-2016128

HTML PDF Collect

Properties and effect of forming sewage sludge into lightweight ceramics

Min YUE, Qinyan YUE, Yuanfeng QI, Baoyu GAO, Hui YU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 1,   Pages 117-124 doi: 10.1007/s11783-010-0220-3

Abstract: In this work we investigated the chemical, thermal and toxic properties of dried sewage sludge (DSS), the preparation and properties of lightweight sludge ceramic (LSC) and the mechanisms of action of the organic and inorganic foaming agents (OFAs and IFAs). The chemical components and thermal properties of the raw materials were studied by Energy Dispersive X-ray Detection (EDX) and Thermogravimetric Analysis and Differential Scanning Calorimetry (DSC/TGA). The mineral phases of the raw materials and the formed ceramics were determined by X-ray Diffraction (XRD). The leaching characteristics of heavy metals were investigated with Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). Different ratios of DSS and clay were mixed and pressed into raw pellets. After drying and preheating treatment, the raw pellets were sintered at 1150°C for 10 min. The physical properties of LSC (50 wt% DSS added) were tested. The results showed that when the addition of DSS was above 50 wt%, LSC began to shrink, and a maximum density occurred. The environmental safety of LSC was satisfactory. XRD showed that some new mineral phases formed in the LSC. Observation of the microstructure by Scanning Electron Microscope (SEM) indicated that the body of LSC was porous.

Keywords： sludge     foaming agents     ceramics     preheating process    

HTML PDF Collect

Optimal placement of PMUs for the smart grid implementation in Indian power grid—A case study

Pathirikkat GOPAKUMAR, G. Surya CHANDRA, M. Jaya Bharata REDDY, Dusmata Kumar MOHANTA

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 358-372 doi: 10.1007/s11708-013-0257-7

Abstract: The concept of smart grid (SG) can provide a highly reliable power system with optimized utilizationThe present Indian power grid requires revolutionary changes to meet the growing demands and to makethe grid smarter and reliable.for SG is the instantaneous monitoring of the voltage, current and power flows at all buses in the gridThis paper proposes the optimal geographical locations for the PMUs in southern region Indian power grid

Keywords： phasor measurement units (PMUs)     smart grid (SG)     southern region Indian power grid (SRIPG)     integer linear    

HTML PDF Collect

Optimal redundant placement of PMUs in Indian power grid — northern, eastern and north-eastern regions

Pathirikkat GOPAKUMAR, G. Surya CHANDRA, M. Jaya Bharata REDDY, Dusmata Kumar MOHANTA

Frontiers in Energy 2013, Volume 7, Issue 4,   Pages 413-428 doi: 10.1007/s11708-013-0274-6

Abstract: This can be envisioned through the implementation of concepts of smart grid (SG).One of the key requisites for SG implementation is that the grid should be completely observable.Renovation of conventional Indian power grid to a SG necessitates incorporation of the phasor measurementunits (PMUs) in the present power grid measurement and monitoring system.The results proposed in this paper can be a stepping stone for revamping the Indian power grid to a SG

Keywords： phasor measurement unit (PMU)     smart grid (SG)     Indian power grid     northern region Indian power grid (NRIPG)     eastern region Indian power grid (ERIPG)     north-eastern region Indian power grid (NERIPG)     redundancy    

HTML PDF Collect

Title Author Date Type Operation

Transient performance comparison of grid-forming converters with different FRT control strategies

Journal Article

A comprehensive review of wind power based power system frequency regulation

Journal Article

Modeling and control of photovoltaic energy conversion connected to the grid

Rebei NAJET, Ben Ghanem BELGACEM, Hasnaoui OTHMAN

Journal Article

Hierarchical control for parallel bidirectional power converters of a grid-connected DC microgrid

Hui-yong HU, Yong-gang PENG, Yang-hong XIA, Xiao-ming WANG, Wei WEI, Miao YU

Journal Article

Analysis and control of wind-driven self-excited induction generators connected to the grid through powerconverters

S. Senthil KUMAR, N. KUMARESAN, N. Ammasai GOUNDEN, Namani RAKESH

Journal Article

Finite element simulations of sheet metal forming under complex strain paths

CHEN Wei, YANG Jichang, WU Xiaofeng, LU Dun, GUO Weigang

Journal Article

Digital high-efficiency print forming method and device for multi-material casting molds

Zhongde SHAN, Zhi GUO, Dong DU, Feng LIU, Wenjiang LI

Journal Article

Near-field radiative thermoelectric energy converters: a review

Eric TERVO, Elham BAGHERISERESHKI, Zhuomin ZHANG

Journal Article

Formation mechanism and modeling of surface waviness in incremental sheet forming

Journal Article

FEM-based strain analysis study for multilayer sheet forming process

Rongjing ZHANG,Lihui LANG,Rizwan ZAFAR

Journal Article

Hybrid forming mechanism of patternless casting and laser cladding

Zhongde SHAN, Fuzhen SUN, Yang LIU

Journal Article

Highlight yield forming and innovative technologies in tropical crops

Wenquan WANG

Journal Article

Properties and effect of forming sewage sludge into lightweight ceramics

Min YUE, Qinyan YUE, Yuanfeng QI, Baoyu GAO, Hui YU

Journal Article

Optimal placement of PMUs for the smart grid implementation in Indian power grid—A case study

Pathirikkat GOPAKUMAR, G. Surya CHANDRA, M. Jaya Bharata REDDY, Dusmata Kumar MOHANTA

Journal Article

Optimal redundant placement of PMUs in Indian power grid — northern, eastern and north-eastern regions

Pathirikkat GOPAKUMAR, G. Surya CHANDRA, M. Jaya Bharata REDDY, Dusmata Kumar MOHANTA

Journal Article