A model development and experimental verification for a vapour microturbine with a permanent magnet synchronous generator

Włodarski, Wojciech

doi:10.1016/j.apenergy.2019.113430

Cited by 10 publications

(12 citation statements)

References 49 publications

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“…In this study, we propose a novel microgrid optimal scheduling strategy, which considers generator degradation. Permanent-magnet synchronous generators (PMSGs) with degraded insulation were analyzed in the study because they are widely utilized in DGs such as WTs [17] and microturbines (MTs) [18]. Insulation degradation is one of the most common forms of degradation in PMSGs [19].…”

Section: Introductionmentioning

confidence: 99%

Microgrid Optimal Scheduling Incorporating Remaining Useful Life and Performance Degradation of Distributed Generators

2022

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This study presents a novel microgrid optimal scheduling strategy, which considers the degradation of distributed generators (DGs). DGs affected by degradation exhibit reduced generation efficiency and capacity. Operating the microgrid without consideration of these impacts increases operating and management costs and reduces reliability and stability. To overcome this problem, we developed a new optimal scheduling strategy that considers the degradation of DGs. This study focuses on a permanent magnet synchronous generator, which is widely used as DGs recently, and on the degradation of stator insulation, which is one of the most frequently occurring forms of degradation. The reduction in performance caused by insulation degradation is analyzed using finite element analysis and is integrated into the optimal scheduling strategy. We demonstrate that the proposed strategy operates a microgrid more economically through a reduction of total operating costs, achieved by adaptively accounting for the increase in operating costs and the reduction of capacity arising from degradation. In addition, the sudden shutdown of a DG can be prevented by predicting its remaining useful life and incorporating it into the optimal scheduling strategy. The effectiveness and feasibility of the proposed strategy are confirmed using various case studies.INDEX TERMS Distributed generator, generator degradation, microgrid, optimal scheduling, remaining useful life estimation. NOMENCLATURE b ESS charging/discharging efficiencies. N g ,N r ,N b ,N l number of dispatchable DGs, renewable DGs, ESSs and loads.

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Section: Introductionmentioning

confidence: 99%

Microgrid Optimal Scheduling Incorporating Remaining Useful Life and Performance Degradation of Distributed Generators

2022

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“…It seems that the use of the microturbines technology in distributed energy will also be developed [16,17]. This technology has seen considerable improvements in terms of efficiency and applicability due to the use of generators based on rare-earth magnets [18,19]. Research on improvements to efficiency and durability and lower building costs of energy systems based on fuel cells [20,21] or PV cells [22,23] is underway.…”

Section: Introductionmentioning

confidence: 99%

Technical and Economic Analysis of the Supercritical Combined Gas-Steam Cycle

et al. 2021

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Combined cycle power plants are characterized by high efficiency, now exceeding 60%. The record-breaking power plant listed in the Guinness Book of World Records is the Nishi-Nagoya power plant commissioned in March 2018, located in Japan, and reaching the gross efficiency of 63.08%. Research and development centers, energy companies, and scientific institutions are taking various actions to increase this efficiency. Both the gas turbine and the steam turbine of the combined cycle are modified. The main objective of this paper is to improve the gas-steam cycle efficiency and to reach the efficiency that is higher than in the record-breaking Nishi-Nagoya power plant. To do so, a number of numerical calculations were performed for the cycle design similar to the one used in the NishiNagoya power plant. The paper assumes the use of the same gas turbines as in the reference power plant. The process of recovering heat from exhaust gases had to be organized so that the highest capacity and efficiency were achieved. The analyses focused on the selection of parameters and the modification of the cycle design in the steam part area in order to increase overall efficiency. As part of the calculations, the appropriate selection of the most favorable thermodynamic parameters of the steam at the inlet to the high-pressure (HP) part of the turbine (supercritical pressure) allowed the authors to obtain the efficiency and the capacity of 64.45% and about 1.214 GW respectively compared to the reference values of 63.08% and 1.19 GW. The authors believe that efficiency can be improved further. One of the methods to do so is to continue increasing the high-pressure steam temperature because it is the first part of the generator into which exhaust gases enter. The economic analysis revealed that the difference between the annual revenue from the sale of electricity and the annual fuel cost is considerably higher for power plants set to supercritical parameters, reaching approx. USD 14 million per annum. It is proposed that investments in adapting components of the steam part to supercritical parameters may be balanced out by a higher profit.

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“…The first option consists in reducing the coal percentage in the domestic power mix, which can be achieved by decreasing electricity production in conventional power plants and/or by increasing its production in other, more environmentally friendly power units. This may refer to the utilisation of other working media [1,8,15,21,23] and power plants with microturbines [33,34,35]. The other option is the use of expensive systems for carbon dioxide capture and storage (CCS).…”

Section: Introduction Current Condition Of Polish Power Industrymentioning

confidence: 99%

Design Analysis of Hybrid Gas Turbine‒Fuel Cell Power Plant in Stationary and Marine Applications

Kwaśniewski

Piwowarski

2020

Polish Maritime Research

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The paper concerns the design analysis of a hybrid gas turbine power plant with a fuel cell (stack). The aim of this work was to find the most favourable variant of the medium capacity (approximately 10 MW) hybrid system. In the article, computational analysis of two variants of such a system was carried out. The analysis made it possible to calculate the capacity, efficiency of both variants and other parameters like the flue gas temperature. The paper shows that such hybrid cycles can theoretically achieve extremely high efficiency over 60%. The most favourable one was selected for further detailed thermodynamic and flow calculations. As part of this calculation, a multi-stage axial compressor, axial turbine, fuel cell (stack) and regenerative heat exchanger were designed. Then an analysis of the profitability of the installation was carried out, which showed that the current state of development of this technology and its cost make the project unprofitable. For several years, however, tendencies of decreasing prices of fuel cells have been observed, which allows the conclusion that hybrid systems will start to be created. This may apply to both stationary and marine applications. Hybrid solutions related to electrical power transmission, including fuel cells, are real and very promising for smaller car ferries and shorter ferry routes.

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A model development and experimental verification for a vapour microturbine with a permanent magnet synchronous generator

Cited by 10 publications

References 49 publications

Microgrid Optimal Scheduling Incorporating Remaining Useful Life and Performance Degradation of Distributed Generators

Microgrid Optimal Scheduling Incorporating Remaining Useful Life and Performance Degradation of Distributed Generators

Technical and Economic Analysis of the Supercritical Combined Gas-Steam Cycle

Design Analysis of Hybrid Gas Turbine‒Fuel Cell Power Plant in Stationary and Marine Applications

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