Valuation about remaining service life of GBM hydraulic power plant units technical and economical aspects

Hara, Tsutomu; Vianna, L.F.L.; Nachvalger, E.E.; Goncalves, E.

doi:10.1109/icpadm.1994.414133

Cited by 2 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another study is Lake Sihwa Tidal Power Plant Project by Bae et al (2010), which looks into the structure and construction methods. Valuation of power plant projects is another topic that has been widely studied, such as Monte Carlo Methods for Appraisal and Valuation: A case study of a nuclear power plant by Rode et al (2001) and Valuation about Remaining Service Life of GBM Hydraulic Power Plant Units Technical and Economic Aspects by Hara et al (1994). One more topic that gains more interest is valuation of renewable power plant, such as Valuation for Renewable Energy: A Comparative Review by Menegaki (2008), which gathers methods for analysis of profit and cost of renewable energy projects.…”

Section: Literature Reviewmentioning

confidence: 99%

Untitled

2018

IJEEP

View full text Add to dashboard Cite

This study examines valuation of power plant projects with two categories of renewable energy: Solar power plants and wind power plants in Thailand. The valuation model shows the amount of electricity generated by solar energy and that generated by wind energy in each day and factors affecting electricity generation, such as cloud cover, temperature and wind speed. The amount of electricity generated is then used to calculate the net present value (NPV), interest rate of return, payback period, and %change of stock price when the project is announced, which can be used to support investors' decision making process.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Untitled

2018

IJEEP

View full text Add to dashboard Cite

show abstract

“…These states are referred to as "excessive deterioration," "prefailure level 1," "prefailure level 2," and "imminent failure," respectively. The values for the operating times 1 and 2 depend on the state determined by max , where the relationship is defined by (6). In the present simulation, the upper and lower limits of the triangular function sufficient to calculate the emission probabilities were set at 9 m relative to max .…”

Section: Hmm Parameters Inferencementioning

confidence: 99%

“…Off-design conditions, such as unit start-stop, switching between operation regimes, load rejection, and out-of-phase synchronization, can influence rotors' transient operations [4,5]. The aging generated by electrical, thermal, and environmental stress due to excessive starts and stops can be compared with the years of operation and the estimated annual equivalent cost of reduced remaining lifetime [6]. There are four main failure modes related to volatile HPP 2 Shock and Vibration conditions: cavitation, erosion, material defects, and fatigue [7].…”

Section: Introductionmentioning

confidence: 99%

Bearing Diagnostics of Hydro Power Plants Using Wavelet Packet Transform and a Hidden Markov Model with Orbit Curves

Pino

Ribas

Guimarães

2018

Shock and Vibration

View full text Add to dashboard Cite

The contribution of a medium-sized hydro power plant to the power grid can be either at base load or at peak load. When the latter is the most common operation mode, it increases the start and stop frequency, intensifying the hydro turbine components' degradation, such as the guide bearings. This happens due to more frequent operation in transient states, which means being outside the service point of the machines' nominal condition, consisting of speed, flow, and gross head. Such transient state operation increases the runner bearings' mechanical vibration. The readings are acquired during the runner start-ups and filtered by a DC component mean value and a wavelet packet transform. The filtered series are used to estimate the relationship between the maximum orbit curve displacement and the accumulated operating hours. The estimated equation associated with the ISO 7919-5 vibration standards establishes the sojourn times of the degradation states, sufficient to obtain the transition probability distribution. Thereafter, a triangular probability function is used to determine the observation probability distribution in each state. Both matrices are inputs required by a hidden Markov model aiming to simulate the equipment deterioration process, given a sequence of maximum orbit curve displacements.

show abstract

Valuation about remaining service life of GBM hydraulic power plant units technical and economical aspects

Cited by 2 publications

References 2 publications

Untitled

Untitled

Bearing Diagnostics of Hydro Power Plants Using Wavelet Packet Transform and a Hidden Markov Model with Orbit Curves

Contact Info

Product

Resources

About