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Pragmatic multi-stage simulated annealing for optimal placement of synchrophasor measurement units in

Pathirikkat GOPAKUMAR,M. JAYA BHARATA REDDY,Dusmata Kumar MOHANTA

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 148-161 doi: 10.1007/s11708-015-0344-z

Abstract: Advanced real time monitoring is facilitated by incorporating synchrophasor measurement units such asphasor measurement units (PMUs) to the power grid monitoring system.Several physical and economic constraints limit the deployment of PMUs in smart power grids.in conjunction with existing conventional measurement units (CMUs) to achieve a complete observabilityMoreover, the method of integrating practical phasor measurement unit (PMU) placement conditions like

Keywords： phasor measurement units (PMUs)     pragmatic PMU placement     simulated annealing (SA)     western region Indian    

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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: Synchro-phasor-measurement devices like phasor measurement units (PMUs) can measure the phasor valuesSince the voltage phasor values at the neighboring buses of a bus containing the PMU can be estimatedusing Ohm’s law, it is redundant to install PMUs at all the buses in a power grid for its complete observabilityThis 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    

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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: 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.and any bus containing a PMU makes the neighboring connected buses observable, optimal placement of PMUsThe PMUs installed in these geographical locations will make the grid completely observable and maintainthe observability under the conditions of failure of some PMUs or branch outages.

Keywords： phasor measurement unit (PMU)     smart grid (SG)     Indian power grid     northern region Indian power grid (NRIPG    

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Distribution and potential ecological risk of heavy metals in the typical eco-units of Haihe River Basin

Jingling LIU,Tao YANG,Qiuying CHEN,Feng LIU,Binbin WANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 103-113 doi: 10.1007/s11783-014-0686-5

Abstract: distribution and characteristics of seven heavy metals in sediments located in the typical ecological units(eco-units) (e.g., rivers, lakes, and estuaries) of Haihe River Basin were analyzed.The results indicated that the concentration scales of As, Hg, Cr, Cd, Pb, Cu, and Zn in the eco-unitsThe risk order of the typical eco-units are as follows: Zhangweinan River (2278345.68)>Estuary (161914.74

Keywords： Haihe River Basin     ecological risk     eco-units     heavy metals    

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Reliability prediction and its validation for nuclear power units in service

Jinyuan SHI,Yong WANG

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 479-488 doi: 10.1007/s11708-016-0425-7

Abstract: In this paper a novel method for reliability prediction and validation of nuclear power units in serviceavailability factor deducting planed outage hours from period hours and maintenance factor are used for the measurementUsing these factors, the equivalent availability factor of nuclear power units in the following 3 yearsFurthermore, the reliability prediction method is validated using the nuclear power units in North Americanis found that the relative errors of the predicted equivalent availability factors for nuclear power units

Keywords： nuclear power units in service     reliability     reliability prediction     equivalent availability factors    

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Implementation and performance evaluation of advance metering infrastructure for Borneo-Wide Power Grid

Mujahid TABASSUM,Manas K. HALDAR,Duaa Fatima S. KHAN

Frontiers in Energy 2020, Volume 14, Issue 1,   Pages 192-211 doi: 10.1007/s11708-016-0438-2

Abstract: data acquisition systems (SCADA) are replaced by a wide area monitoring system(WAMS) comprising of a phasormeasurement unit (PMU).

Keywords： renewable energy     multiprotocol label switching (MPLS)     power grid     phasor measurement unit (PMU)     supervisory    

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density measurement for plastic injection molding via ultrasonic technology

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0714-2

Abstract: Therefore, in-situ density measurement is of great interest and has significant application valueThis study is the first to propose an in-situ density measurement method using ultrasonic technologyThe proposed method has the advantages of in-situ measurement, non-destructive, high accuracy,

Keywords： ultrasonic measurement     melt density     in-situ measurement     injection molding    

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Capacity limitation of nuclear units in grid based on analysis of frequency regulation

Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 148-154 doi: 10.1007/s11708-012-0174-1

Abstract: The increasing capacity of nuclear units in power grid poses threat to system stability and security.Load disturbance may cause overspeed of the units and trigger the overspeed protection controller (OPCBased on the analysis of frequency regulation, mathematic models for nuclear units in the grid are establishedThe critical action of the OPC is proposed as the constraint of safe operation for the units.This research can help to estimate the capacity limitation of nuclear units in the grid.

Keywords： nuclear units capacity     overspeed     primary frequency control (PFC)     second frequency control (SFC)    

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Optimal operation of energy at hydrothermal power plants by simultaneous minimization of pollution and costs using improved ABC algorithm

Homayoun EBRAHIMIAN,Bahman TAHERI,Nasser YOUSEFI

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 426-432 doi: 10.1007/s11708-015-0376-4

Abstract: The aim of this paper is simultaneous minimization of hydrothermal units to reach the best solution byIn this type of optimization problem, all practical constraints of units were taken into account as muchThese constraints include the maximum and minimum output power of units, the constraints caused by the

Keywords： practical constraints of units     pollution function     inlet steam valve     up-ramp rate of units     improved ABC    

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Energy conservation in China’s coal-fired power industry by installing advanced units and organized phasing

Weiliang WANG, Junfu LYU, Zheng LI, Hai ZHANG, Guangxi YUE, Weidou NI

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 798-807 doi: 10.1007/s11708-019-0633-z

Abstract: Coal-fired power is the main power source and the biggest contributor to energy conservation in the past several decades in China. It is generally believed that advanced technology should be counted on for energy conservation. However, a review of the decline in the national average net coal consumption rate (NCCR) of China’s coal-fired power industry along with its development over the past few decades indicates that the up-gradation of the national unit capacity structure (including installing advanced production and phasing out backward production) plays a more important role. A quantitative study on the effect of the unit capacity structure up-gradation on the decline in the national average NCCR suggests that phasing out backward production is the leading factor for the decline in the NCCR in the past decade, followed by the new installation, whose sum contributes to approximately 80% of the decline in the national average NCCR. The new installation has an effective affecting period of about 8 years, during which it would gradually decline from a relatively high value. Since the effect of phasing out backward production may remain at a certain degree given a continual action of phasing out backward capacity, it is suggested that the organized action of phasing out backward production should be insisted on.

Keywords： coal-fired power     energy conservation     net coal consumption rate     new installation     phasing out backward production     unit capacity structure    

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Occurrence and migration of microplastics and plasticizers in different wastewater and sludge treatment units

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1577-9

Abstract:

● Reduce the quantifying MPs time by using Nile red staining.

Keywords： Microplastics     Municipal wastewater treatment plant     Phthalate esters     Thermal hydrolysis    

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High risk factors for pulmonary fungous infection in intensive care units of neurosurgery

ZHU Wenyu, TAN Liping, CHEN Xiangfeng, HUANG Qiang, LAN Qing

Frontiers of Medicine 2007, Volume 1, Issue 3,   Pages 299-303 doi: 10.1007/s11684-007-0057-8

Abstract: By analyzing the high risk factors for pulmonary fungous infection in intensive care units of neurosurgery

Keywords： seventeen     incidence     glucocorticoid     broad-spectrum antibiotic     Candidiasis    

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Inhibition character of crotonaldehyde manufacture wastewater on biological acidification

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1403-9

Abstract:

• The inhibition of the main organic pollutions in CMW was demonstrated.

Keywords： Crotonaldehyde manufacture wastewater     Biological acidification     Volatile fatty acids     Inhibition     Toxic units    

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A measurement system for thin elastohydrodynamic lubrication films

WANG Xuefeng, GUO Feng, YANG Peiran

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 193-196 doi: 10.1007/s11465-007-0032-8

Abstract: An elastohydrodynamic lubrication (EHL) film measurement system using multi-beam interferometry is introducedThe measurement principle and the instrumentation are discussed.It is demonstrated that the presented measurement system can provide continuous measurement of lubricating

Keywords： instrumentation     continuous measurement     elastohydrodynamic lubrication     ultra-thin     measurement    

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Cerebration and Practice of Expanded feedstock sources for Ethylene units

Cao Xianghong

Strategic Study of CAE 2001, Volume 3, Issue 5,   Pages 35-43

Abstract: by-product of the de-waxing of the vacuum second and third cuts, can be used as feedstock for ethylene unitstests of the feedstock, the evaluation in a simulated cracker and the application results on industrial units

Keywords： ethylene     feedstock     sources    

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Title Author Date Type Operation

Pragmatic multi-stage simulated annealing for optimal placement of synchrophasor measurement units in

Pathirikkat GOPAKUMAR,M. JAYA BHARATA REDDY,Dusmata Kumar MOHANTA

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

Distribution and potential ecological risk of heavy metals in the typical eco-units of Haihe River Basin

Jingling LIU,Tao YANG,Qiuying CHEN,Feng LIU,Binbin WANG

Journal Article

Reliability prediction and its validation for nuclear power units in service

Jinyuan SHI,Yong WANG

Journal Article

Implementation and performance evaluation of advance metering infrastructure for Borneo-Wide Power Grid

Mujahid TABASSUM,Manas K. HALDAR,Duaa Fatima S. KHAN

Journal Article

density measurement for plastic injection molding via ultrasonic technology

Journal Article

Capacity limitation of nuclear units in grid based on analysis of frequency regulation

Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN

Journal Article

Optimal operation of energy at hydrothermal power plants by simultaneous minimization of pollution and costs using improved ABC algorithm

Homayoun EBRAHIMIAN,Bahman TAHERI,Nasser YOUSEFI

Journal Article

Energy conservation in China’s coal-fired power industry by installing advanced units and organized phasing

Weiliang WANG, Junfu LYU, Zheng LI, Hai ZHANG, Guangxi YUE, Weidou NI

Journal Article

Occurrence and migration of microplastics and plasticizers in different wastewater and sludge treatment units

Journal Article

High risk factors for pulmonary fungous infection in intensive care units of neurosurgery

ZHU Wenyu, TAN Liping, CHEN Xiangfeng, HUANG Qiang, LAN Qing

Journal Article

Inhibition character of crotonaldehyde manufacture wastewater on biological acidification

Journal Article

A measurement system for thin elastohydrodynamic lubrication films

WANG Xuefeng, GUO Feng, YANG Peiran

Journal Article

Cerebration and Practice of Expanded feedstock sources for Ethylene units

Cao Xianghong

Journal Article