Real-time reliability index of a steam power plant: A systems approach

Mohan, M; Gandhi, O.P.; Agrawal, Vikesh

doi:10.1243/09576509jpe549

Cited by 18 publications

(11 citation statements)

References 11 publications

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“…The analysis of performance of an SPP in section 2 proves that the SSG developed by the author [15] for an SPP from the view point of structural reliability analysis can be extended for development of a PPD. This is because the edges of the SSG represent the processes taking place in the SPP and the nodes of SSG, the interconnections among the processes.…”

Section: Identification Of Processes For Ppdmentioning

confidence: 84%

“…The value of operational parameters depends upon performance efficiency of subsystems. The 12 systems of an SPP consist of 60 of subsystems which have been identified by the authors [15].…”

Section: Performance Analysis Of An Sppmentioning

confidence: 99%

“…The SSG of an SPP had been developed by combining the SSGs of macro-systems boiler and TG of SPP [15]. Thus, for determining the efficiency of an SPP, the efficiency of its corresponding macro-processes, that is, boiler and TG, is required to be considered.…”

Section: Ppd Of the Sppmentioning

confidence: 99%

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Real-time efficiency index of a steam power plant: A systems approach

Mohan¹,

Gandhi

Agrawal

2006

Proceedings of the Institution of Mechanical Engineers, Part A:

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The present system of recording efficiency parameters under process performance of a steam power plant (SPP) includes specific fuel consumption, auxiliary power consumption, and demineralized water for make-up used during past-specific period, without their integration into a single process performance or efficiency index. For developing integrated efficiency index in real time frame, the use of a process performance digraph (PPD) comprising of P i 's as nodes and p ij 's as interconnection among the nodes as obtained from the system structure graph (SSG) of SPP has been demonstrated. Each c ij of SSG corresponds to a process, such as air fuel mixing, combustion of mixtuer, generation and expansion of steam and its condensation back into water for recirculation in boiler, etc., taking place in the SPP and corresponds to a P i of PPD. The PPD is then analysed for determining the efficiency of the SPP using matrix method following systems approach.Variable permanent process performance matrix and its variable permanent function (VPF-p) have been derived from the PPD for the analysis. The real-time efficiency index (RTEI) has been introduced which is the ratio of the values of (VPF-p) in realtime (RT) situation (VPF-p) RT to its achievable design value (VPF-p). It reflects the RT rate of consumption of various inputs like demineralized water make-up, auxiliary power and fuel consumption, etc. It provides a more scientific method for ranking the performance of an SPP. The proposed model is capable of analysing in RT the performance of various systems of the SPP, taking into account simultaneously the failure of various equipments in these systems. A step-by-step procedure for calculation of RTEI has also been suggested and illustrated by giving an example.

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Section: Identification Of Processes For Ppdmentioning

confidence: 84%

“…The value of operational parameters depends upon performance efficiency of subsystems. The 12 systems of an SPP consist of 60 of subsystems which have been identified by the authors [15].…”

Section: Performance Analysis Of An Sppmentioning

confidence: 99%

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Real-time efficiency index of a steam power plant: A systems approach

Mohan¹,

Gandhi

Agrawal

2006

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…Therefore, there is need to choose a methodology which reduces the state space, and a subsequent selection and evaluation of contingencies. The graph theoretical analysis (GTA) method [5,6] is chosen for this study.…”

Section: Introductionmentioning

confidence: 99%

Model Development for Analysis of Steam Power Plant Reliability

Mangara¹

2017

Recent Improvements of Power Plants Management and Technology

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The graph theoretical analysis and a graph's characteristic polynomial are deployed as the basis for a system approach employed to develop a model for estimating the reliability index and evaluating the availability index for a coal-fired generating power station. In this research, the coal-fired generating station system is divided into six subsystems. Elementary to evaluating the reliability (estimate) of the said system is the consideration of all the subsystems and their interrelations. Approximate reliability attributes of the graph are used to model the approximate reliability of the coal-fired generating station. Subsystem reliability is represented by the nodes in the graph, and the links represent the reliability of interrelations of these subsystems. Computing a graph's characteristic polynomial using three different methods, namely, the linearly independent cycles, the figure equation and the adjacent matrix, the approximate reliability of the system is determined. Three methods are used, for comparison purposes, as estimating reliability is always an imperfect endeavour. The methodology proposed in this study is illustrated step-by-step with the help of examples.

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“…Mohan et al [16] obtained Real Time Reliability Index (RTRI) for a SPP using GTA. Salient features of GTA that incorporation or deletion of any number of systems and subsystems, consideration of interaction among subsystems were also discussed.…”

Section: Introductionmentioning

confidence: 99%

GTA modeling of combined cycle power plant efficiency analysis

Dev

Samsher

Kachhwaha

et al. 2015

Ain Shams Engineering Journal

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A methodology based upon graph theory and matrix method is developed for the efficiency analysis of a Combined Cycle Power Plant (CCPP) with a view that a person at managerial level may decide regarding efficiency improvement without in-depth knowledge of conventional methods of thermal efficiency evaluation. For the analysis, CCPP is divided into six sub-systems and interdependency is identified to develop system structure digraph. Sub-system efficiencies are further dependent on numerous parameters which are interdependent. Therefore, methodology developed at system level is extended to sub-system level. Performance parameter digraph is developed at sub-system level by intriguing inheritance and interdependencies of parameters. Digraph is converted into matrix form and permanent function is developed. The value of permanent function in real time situation is compared with design condition to obtain Relative Efficiency Index (REI) at sub-system level. REI at sub-system level is guidance for deviation of efficiency index from its design value.Ó 2014 Production and hosting by Elsevier B.V. on behalf of Ain Shams University.

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Real-time reliability index of a steam power plant: A systems approach

Cited by 18 publications

References 11 publications

Real-time efficiency index of a steam power plant: A systems approach

Real-time efficiency index of a steam power plant: A systems approach

Model Development for Analysis of Steam Power Plant Reliability

GTA modeling of combined cycle power plant efficiency analysis

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