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Contingency Reserve Evaluation for Fast Frequency Response of Multiple Battery Energy Storage Systems in a Large-scale Power Grid

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CSEE Journal of Power and Energy Systems 2023年第3期9卷 873-883页

作者： Indira Alcaide-Godinez Feifei Bai tapan Kumar saha Rizah Memisevic School of Information Technology and Electrical Engineering the University of QueenslandBrisbaneQLD 4072Australia School of Information Technology and Electrical Engineering the University of Queensland(UQ)BrisbaneQLD 4072 School of Engineering and Built Environment Griffith UniversityGold CoastQLD 4222Australia EPEC Group BrisbaneQLD 4014Australia

Recently,the fast frequency response(FFR)service by large-scale battery energy storage systems(BESSs)has been successfully proved to arrest the frequency excursion during an unexpected power ***,adequate frequency response relies on proper evaluation of the contingency reserve of *** BESS FFR reserve is commonly managed under fixed contracts,ignoring various response characteristics of different BESSs and their coexisting *** paper proposes a new methodology based on dynamic grid response and various BESS response characteristics to optimise the FFR reserves and prevent the frequency from breaching the under-frequency load shedding(UFLS)*** superiority of the proposed method is demonstrated to manage three large-scale BESSs operating simultaneously in an Australian power grid under high renewable penetration ***,the proposed method can identify remaining battery power and energy reserve to be safely utilised for other grid services(e.g.,energy arbitrage).The results can provide valuable insights for integrating FFR into conventional ancillary services and techno-effective management of multiple BESSs.

关键词： Fast frequency response(FFR) fast frequency contingency reserve multiple large-scale battery energy storage system(BESS) synthetic inertia requirement under-frequency load shedding(UFLS)

Frequency Response of PV Inverters Toward High Renewable Penetrated Distribution Networks

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CSEE Journal of Power and Energy Systems 2022年第2期8卷 465-475页

作者： Feifei Bai Yi Cui Ruifeng Yan tapan Kumar saha Huajie Gu Daniel Eghbal the School of Information Technology and Electrical Engineering the University of QueenslandBrisbaneQLD 4072Australia the School of Engineering and Built Environment at Griffith University Gold CoastQLD 4222Australia the Australian Energy Market Operator(AEMO) BrisbaneQLD 4000Australia Energy Queensland(Energex) BrisbaneQLD 4006Australia

Substantial usage of electronic-based renewable energy resources has completely changed the dynamic behaviours and response time of power networks,which are now fundamentally different from traditional power networks dominated by Synchronous Generators(SGs).This paper evaluates the dynamic response of small-scale Photovoltaic(PV)inverters,which dominate the distribution networks and influence the dynamics of the entire power ***,some critical events which occurred in Australia have shown that the dynamic responses of small-scale inverters do not always follow the inverter ***,these uncertainties make PV inverters’response unpredictable and have the potential to threaten the security of power *** detailed investigation of the dynamic response characteristics of small-scale PV inverters to grid disturbances is lacking in the current *** paper presents new findings from experimental testing under extensive network disturbance ***,a datadriven method is proposed to accurately describe the dynamics of solar PV subjected to various frequency *** results provide beneficial insight to the network operators in predicting power system response to extreme disturbances and avoiding potential grid instability issues,which will assist in achieving 100%penetration of power electronics-based renewable energy resources in the future.

关键词： Deep learning distribution networks dynamic response distributed PV load modelling PV inverter

Adsorption of Methyl Orange onto Chitosan from Aqueous Solution

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Journal of Water Resource and Protection 2010年第10期2卷 898-906页

作者： tapan Kumar saha Department of Chemistry Jahangirnagar University Savar Bangladesh

Chitosan was utilized as adsorbent to remove methyl orange (MO) from aqueous solution by adsorption. Batch experiments were conducted to study the effects of pH, initial concentration of adsorbate and temperature on dye adsorption. The kinetic data obtained from different batch experiments were analyzed using both pseudo first-order and pseudo second-order equations. The equilibrium adsorption data were analyzed by using the Freundlich and Langmuir models. The best results were achieved with the pseudo second-order kinetic model and with the Langmuir isotherm equilibrium model. The equilibrium adsorption capacity (qe) increases with increasing the initial concentration of dye and with decreasing pH. The values of qe were found to be slightly increased with increasing solution temperatures. The activation energy (Ea) of sorption kinetics was found to be 10.41 kJ/mol. Thermodynamic parameters such as change in free energy (△G), enthalpy (△H) and entropy (△S) were also discussed.

关键词： Adsorption Kinetics Chitosan Anionic dyes Wastewater

Kinetics, Isotherm and Thermodynamic Studies of the Adsorption of Reactive Red 239 Dye from Aqueous Solution by Chitosan 8B

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Advances in Biological Chemistry 2019年第1期9卷 1-22页

作者： Subarna Karmaker Farin Sintaha tapan Kumar saha Department of Chemistry Jahangirnagar University Savar Bangladesh

The adsorption of reactive red 239 (RR239) dye onto chitosan 8B was studied in aqueous solution at various pHs, initial dye concentrations, ionic strengths and temperatures, respectively. The adsorption of dye onto chitosan 8B was confirmed by diffuse reflectance electronic absorption spectra. The adsorption of RR239 onto chitosan 8B was greatly influenced by solution pHs, initial dye concentrations, ionic strengths and temperatures. The kinetics and mechanism of dye adsorption process were analyzed by pseudo first-, second-order, Elovich and intraparticle diffusion kinetic models. The adsorption kinetics of RR239 dye followed a pseudo second-order model very well. The surface sorption and intraparticle diffusion mechanisms were involved in the actual sorption process. The equilibrium isotherm data were fitted well with the Langmuir model rather than the Freundlich, Temkin and Dubinin-Radushkevich models. The maximum dye adsorption onto chitosan 8B was estimated to be 163.93 μmol/g at 45°C. The activation energy (Ea) was obtained to be 23.30 kJ/mol. The computed thermodynamic parameters such as ΔG, ΔH, ΔS, ΔG, ΔH and ΔS confirmed that the adsorption of RR239 dye onto chitosan 8B was a spontaneous endothermic physisorption process. Desorption test was carried out in NaOH solution (pH 12.5) and the chitosan flakes could be reused.

关键词： Chitosan Reactive Red 239 Adsorption Kinetics Mechanism Thermodynamics

Mitigation of Distributed Generation Impact on Protective Devices in a Distribution Network by Superconducting Fault Current Limiter

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Energy and Power Engineering 2013年第4期5卷 258-263页

作者： Yu Zhao Yong Li tapan Kumar saha Olav Krause College of Electrical and Information Engineering Hunan University Changsha China School of Information Technology and Electrical Engineering University of Queensland Australia

Protection of radial distribution networks is widely based on coordinated inverse time overcurrent relays (OCRs) ensuring both effectiveness and selectivity. However, the integration of distributed generation (DG) into an existing distribution network not only inevitably increases fault current levels to levels that may exceed the OCR ratings, but it may also disturb the original overcurrent relay coordination adversely effecting protection selectivity. To analyze the potentially adverse impact of DG on distribution system protective devices with respect to circuit breaker ratings and OCR coordination fault current studies are carried out for common reference test system under the influence of additional DG. The possible advantages of Superconducting Fault Current Limiter (SFCL) as a means to limit the adverse effect of DG on distribution system protection and their effectiveness will be demonstrated. Furthermore, minimum SFCL impedances required to avoid miss-operation of the primary and back-up OCRs are determined. The theoretical analysis will be validated using the IEEE 13-bus distribution test system is used. Both theoretical and simulation results indicate that the proposed application of SFCL is a viable option to effectively mitigate the DG impact on protective devices, thus enhancing the reliability of distribution network interfaced with DG.

关键词： Overcurrent Relay (OCR) Distribution Protection Coordination Distributed Generation (DG) Fault Current Superconducting Fault Current Limiter (SFCL)

A Framework to Assess Possible Sources of Stakeholder Exploitation:A Developing Country Case

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International Journal of Disaster Risk Science 2024年第1期15卷 32-44页

作者： Kamran Shafique Syed Shams tapan Sarker School of Business University of Southern QueenslandSpringfeldQLD 4300Australia Business School University of QueenslandSt LuciaQLD 4072Australia

Solving complex post-disaster reconstruction challenges requires the altruistic involvement of heterogeneous stakeholder ***,small,more organized groups,such as government parastatals,private developers,and contractors often exploit large,unorganized groups,such as affected communities,leaving them more vulnerable to future *** on data collected from a case study in Pakistan,this study proposed a framework to assess,anticipate,and mitigate the exploitation of vulnerable stakeholders in post-disaster reconstruction *** framework draws on influential management theories and utilizes reciprocal relationships between stakeholder attributes(power,legitimacy,and urgency),participation,and *** study also argued for non-binary treatment of stakeholder *** framework will allow practitioners to address issues around the exploitation of stakeholder interests in future post-disaster reconstruction projects.

关键词： Collective action Pakistan Post-disaster reconstruction-Stakeholder participation Stakeholder exploitation

Adsorption of Methyl Orange onto Chitosan from Aqueous Solution

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Development of a new coated electrode with low nickel content for welding ductile iron and its response to austempering

Journal of Water Resource and Protection（水资源与保护） 2010年第10期 898-906页

作者： tapan Kumar saha Nikhil Chandra Bhoumik Subarna Karmaker Mahmooda Ghani Ahmed Hideki Ichikawa Yoshinobu Fukumori

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International Journal of Minerals,Metallurgy and Materials 2018年第9期25卷 1090-1103页

作者： tapan Sarkar Ajit Kumar Pramanick tapan Kumar Pal Akshay Kumar Pramanick Welding Technology Centre Jadavpur University Department of Forge Technology NIFFT

Coated Electrodes with small amounts of nickel were developed for welding ductile iron(DI) and conversion of the same into austempered ductile iron(ADI) after austempering. Among six electrodes, Trials 3 and 4 were selected for establishing crack-free weld deposits via preheating and post-weld heat treatment. Austenitization was performed at 900°C for 2 h and austempering at 300 or 350°C for three different holding times to observe the results of austempering with respect to the microstructure, hardness, and austempering kinetics of the samples. The microstructures of the weld deposits showed needle-like bainitic ferrite with small amounts of retained austenite when treated at 300°C and feathery bainitic ferrite with large amounts of retainedaustenite when treated at 350°C. The electrode labeled with Trial 3 revealed greater austenite contents than that labeled with Trial 4 when treated with a 2 h holding time regardless of the austempering temperature applied. The transformation rate of the bainitic ferrite of Trial 3 was relatively higher than that of Trial 4 and showed a lower rate constant, leading to a higher diffusion rate of carbon in austenite.

关键词： electrode development microstructure XRD analysis transformation kinetic microhardness

Role of Microstructural Constituents on Surface Crack Formation During Hot Rolling of Standard and Low Nickel Austenitic Stainless Steels

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Acta Metallurgica Sinica(English Letters) 2013年第2期26卷 206-216页

作者： Manidipto Mukherjee tapan Kumar Pal Welding Technology Centre Metallurgical and Material Engineering Department Jadavpur University

The effect of alloy segregation and delta （δ） ferrite contents on surface cracking of three standard （i.e. AISI 304L, AISI 310S and AISI 321） and two low nickel （i.e. LNi-1 and LNi-0.3） austenitic stainless steels （ASS） during hot roiling was investigated using optical microscopy （OM）, automatic image analyzer, scanning electron microscopy （SEM）, energy dispersive X-ray spectroscopy （EDX） and electron probe micro analyzer （EPMA）. It was observed that the amount of 6-ferrite varied among different grades and also distributed heterogeneously across the width of the steel plates. In general, low nickel ASS showed higher amount of 6-ferrite compared to the standard ASS grades. The tendency to surface cracking during hot rolling gradually increased with increasing 6-ferrite content. Interestingly, carbon and nitrogen exerted maximum effect on 6-ferrite formation. The higher carbon and nitrogen content in the steel decreased 6-ferMte content. In addition, the segregation of Cu and Mn plays significant role in low nickel ASS and Ni-Cr in case of standard ASS has profound effect on surface cracking of the steel plates. A possible cause of surface crack formation/origination in steel plates during hot rolling was discussed.

关键词： Austenitic stainless steel Hot rolling Surface cracking Alloy segregation δ ferrite