Project Risk Management in Hydropower Plant Projects

2011 ◽  
Vol 3 (2) ◽  
pp. 171-186 ◽  
Author(s):  
Weddy Bernadi Sudirman ◽  
Sarwono Hardjomuljadi
Keyword(s):  
Risk Management ◽  
Time Delays ◽  
Power Plants ◽  
Hydroelectric Power Plant ◽  
Hydropower Plant ◽  
Hydroelectric Power ◽  
Project Risk ◽  
Cost Overruns ◽  
Installed Capacity ◽  
Hydropower Construction

The development of hydroelectric power plant is one of the efforts in utilising water resources for people’s welfare by generating the energy for electricity purpose. Nowadays, the installed capacity of hydro electric power plants is 3,529 MW from the total installed capacity 24,846 MW from various power plants owned by PT PLN (Persero) and the hydropower potential 75,000 MW all over Indonesia. Hydroelectric power plant has complex structures and involves large amounts of capital with a long-running construction period. This situation imposes uncertainty factors with considerably high risks. The construction phase is identified as a critical phase in hydropower projects where many unforeseen factors occur. Failure to manage project risks leads to significant problems for the client such as completion time delays and cost overruns. In order to prevent time delays and cost overruns in hydropower construction in PT PLN (Persero), the study on project risk management in the construction stage of hydropower plant projects had been conducted. The purpose of this study was to identify and measure the importance of construction risks and to determine the level of agreement or disagreement between the client, consultants and contractors on the ranking of construction risk in hydropower projects. The author selected the respondents from the clients, consultants and contractors’ personnel who had work experience in hydropower construction projects in PT PLN (Persero). JEL Classification: L74—Construction

Using SEM and EDS for material’s analysis of the small hydroelectric power plant: case study/ Utilizando MEV e EDS para análise do material de uma pequena central hidrelétrica: estudo de caso

2021 ◽  
Vol 7 (7) ◽  
pp. 70032-70050
Author(s):  
Gláucia Nolasco de Almeida Mello ◽  
Cynara Fiedler Bremer ◽  
Fernanda Gallotti Costa ◽  
Raissa Pinheiro Dutra
Keyword(s):  
Power Plants ◽  
Socioeconomic Development ◽  
Chemical Elements ◽  
Energy Dispersive Spectrometer ◽  
Microstructural Analysis ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power ◽  
Alkali Aggregate Reaction ◽  
Isolated Points ◽  
Installed Capacity

Small Hydroelectric Power Plants (SHPPs) are hydroelectric of reduced size and power, i.e., less than thirteen square kilometres of reservoir area and power less than 30 MW (megawatts). SHPPs account for about 3.7% of all installed capacity of the Brazilian power generation system, which demonstrates their relevance in the national scenario. In addition to this function, SHPPs also influence the socioeconomic development of the region by helping to create direct and indirect jobs. In this context, the goal of this work was the microstructural analysis of the concrete of the dam of SHPP Ponte Queimada, installed in Rio Casca, Minas Gerais, Brazil. Ponte Queimada was built in 1936; over the years it underwent some interventions and, currently, it undergoes a new intervention for maintenance and repairs. By means of visual inspection, the sites for collecting the samples were identified. The samples were analysed regarding the morphology and chemical composition of the concrete using Scanning Electron Microscope (SEM) and energy dispersive spectrometer (EDS). Based on the collected samples, isolated points of occurrence of alkali-aggregate reaction (AAR) were identified. The observed samples, besides possessing chemical elements compatible with manifestations of AAR, also presented shapes that visually resemble to them. It was concluded that the use of SEM is an effective and relatively simple alternative for the identification of pathological manifestations that could compromise the durability of the structures, often allowing the determination of repair measures in anticipation of the prevention of future problems.

Risk Management in Small Hydroelectric Power Plants (SHPPs) in Colombia

2020 ◽  
pp. 223-246
Author(s):  
Gustavo Alberto Villamarin ◽  
Flor Nancy Díaz-Piraquive
Keyword(s):  
Risk Management ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power ◽  
Technical Standards ◽  
Global Trend ◽  
Hydroelectric Power Plants ◽  
Risk Management Methodology ◽  
Generation Power

Although Colombia has more than 50 years of experience developing hydropower projects, the recent Hidroituango project crisis has opened the debate regarding risk management (RM) in generation power projects, especially for non-conventional renewable energy sources (NCRES) where there are no academic studies for Colombian case. This chapter develops a methodological proposal based on PMBOK, ISO standard, and Colombian technical standards, that will allow identification, assessment, and management of the risks inherent in small hydroelectric power plant (SHPP) projects. All this in the context of the opportunities generated by Law 1715 of 2014 and the mega global trend of transition from fossil sources of energy to NCRES. The methodology was built based on: a state of the art review, an expert's knowledge consultation, and a Delphi expert's assessment analysis. The result is a project risk management methodology that includes: holistic identification of risk variables in SHPP projects, assessment of experts and response to inherent and residual risks.

Application of Intelligent Technological Systems in Order to Increase Efficiency of the Lock Chamber System in Hydro Power Plants

2015 ◽  
Vol 806 ◽  
pp. 64-73
Author(s):  
Aleksandar Vujović ◽  
Zdravko Krivokapić ◽  
Jelena Jovanović
Keyword(s):  
Power Plants ◽  
Hydroelectric Power Plant ◽  
Global Market ◽  
Real System ◽  
Hydroelectric Power ◽  
Initial State ◽  
Hydro Power ◽  
Lock Chamber ◽  
Levels Of Automation ◽  
Hydro Power Plants

The paper is a result of research at the Mechanical Engineering Faculty in Podgorica and represents the aspiration of authors to combine scientific and technical experience in order to achieve improvement in a real system. It is a complex system of lock chambers in a hydroelectric power plant. Based on a detailed analysis of the initial state, through the process modeling of complex real system, the authors identify possible areas where the intervening and applying modern systems with greater flexibility is necessary to achieve higher levels of automation. Also, proposed in the paper are measures for ensuring the security of information that rise system performance to a higher level compared to the competition and create an advantage in the global market.

Functional Analysis and Exergoeconomic Evaluation for the Combined Production of Electromechanical Power and Useful Heat of a Cogeneration Power Plant

2011 ◽  
Author(s):  
Washington Orlando Irrazabal Bohorquez ◽  
Joa˜o Roberto Barbosa
Keyword(s):  
Power Plant ◽  
Electricity Market ◽  
Sugar Cane ◽  
Power Plants ◽  
Hydroelectric Power Plant ◽  
Sugar Cane Bagasse ◽  
Fuel Oil ◽  
Hydroelectric Power ◽  
The Us ◽  
Electrical Generation

In the Ecuadorian electrical market, several sugar plants, which significantly participate in the local electricity market, are producing their own energy and commercializing the surplus to the electrical market. This study evaluates the integral use of the sugar cane bagasse for productive process on a Cogeneration Power Plant in an Ecuadorian Sugar Company [8]. The electrical generation based on biomass requires a great initial investment. The cost is around US$ 800/kW installed, twice the US$ 400/kW initial investment of conventional thermoelectric power plant and almost equal to the US$ 1,000/kW initial cost of hydroelectric power plant [5]. A thermoeconomic study was carried out on the production of electricity and the sales of the surplus of 27 MWe average produced by the power plant. An operational analysis was made using instantaneous values from the estimated curves of demand and generation of electricity. From the results, it was concluded that the generated electricity costs are 0.0443 US$/kWh, while the costs of the electricity from Fossil Power Plants (burning fuel oil, diesel fuel and natural gas) are in the range 0.03–0.15 US$/kWh and from Hydroelectric Plants are about 0.02 US$/kWh. Cogeneration power plants burning sugar cane bagasse could contribute to the mitigation of climatic change. This specific case study shows the reduction of the prospective emissions of greenhouse gases, around 55,188 ton of CO2 equivalent yearly for this cogeneration power plant.

Regulation and Energy Policy, Hydropower Plant Upgrading, and Environment

1994 ◽  
Vol 5 (2) ◽  
pp. 149-158
Author(s):  
Javier Escudero
Keyword(s):  
Energy Policy ◽  
Power Plants ◽  
Hydropower Plant ◽  
Hydroelectric Power ◽  
Size Discrimination ◽  
Hydroelectric Power Plants ◽  
Generation Capacity ◽  
Reduction Of Emissions

Improvements in existing hydroelectric power plants can increase quantity of production, but very often they are also designed to improve its quality, that is, peak generation capacity and availability of reserve energy, which in turn leads to a reduction of emissions in the producer part. An adequate valuation and economic recognition of the energy quality in remuneration seems essential to encourage these improvements. Frequent size discrimination acts against this recognition, because quality of energy is more often present in conventional-sized installations.

Failure on Bearing Cooler Coils Connector of Hydroelectric Power Plant

2019 ◽  
Vol 805 ◽  
pp. 185-190
Author(s):  
Meilinda Nurbanasari ◽  
Tri Sigit Purwanto ◽  
Tarsisius Kristyadi ◽  
Deden Syamsurizal
Keyword(s):  
Hydroelectric Power Plant ◽  
Hardness Test ◽  
Hydropower Plant ◽  
Composition Analysis ◽  
Pipe Material ◽  
Hydroelectric Power ◽  
Nondestructive Tests ◽  
Stainless Steel 304 ◽  
One Year

Bearing cooler coils connector of 175 MW hydropower plant experienced premature leaks after one year operation and caused an unscheduled shutdown. To avoid the same failure in the future, the leaking bearing cooler coils connector was investigated. Nondestructive tests, such as chemical composition analysis, hardness test, metallographic test, characterization of the filler brazing by scanning electron microscopy – energy dispersive X-ray spectroscopy were conducted. The results confirmed that the bearing cooler coils connector consisted of two types of material namely the flange material which was made of stainless steel 304 and the pipe material which was a Cu/Ni 90/10 and were joined together using brazing process. It was a clearly evidence that leaks occurred in the brazing area and the leakage was due to improper brazing process. It was shown by the excessive gap and a lot of porosity.

Application of the contingent valuation method in a developing country: a case study of the Yusufeli Dam in northeast Turkey

2010 ◽  
Vol 62 (1) ◽  
pp. 99-105 ◽  
Author(s):  
Emre Alp ◽  
Ülkü Yetiş
Keyword(s):  
Contingent Valuation ◽  
Urban Areas ◽  
Power Plants ◽  
Cost Benefit Analysis ◽  
Contingent Valuation Method ◽  
Cost Benefit ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power ◽  
Turkish Republic ◽  
Valuation Method

Hydroelectric power plants and dams often play an important role in developing countries in terms of their contribution to economy. In accordance with the energy policies of Turkish Republic, Yusufeli Dam and Hydroelectric Power Plant in Northeastern Turkey have been initiated. In this study, the Contingent Valuation Method (CVM) was conducted in Yusufeli Village to determine the environmental costs of the Yusufeli Project. The purpose is to assess the willingness to pay (WTP) of Yusufeli Village residents for restoration of the environmental impacts of the dam project and also to investigate the underlying economic, psychological, and social motivations for WTP. WTP was calculated as US$761 per person which can further be used in the cost–benefit analysis. The results from the study suggest that application of the CVM in rural and urban areas located in the same region can show differences.

scholarly journals Applying an Exponentially Weighted Moving Average control chart using flow history and assured energy levels to small hydroelectric power plants

RBRH ◽  
2020 ◽  
Vol 25 ◽  
Author(s):  
Bruna Tayla Cabral de Vasconcellos ◽  
Geraldo Lúcio Tiago Filho ◽  
Benedito Donizeti Bonatto ◽  
Oswaldo Honorato de Souza Junior
Keyword(s):  
Control Charts ◽  
Power Plants ◽  
Moving Average ◽  
Energy Levels ◽  
Hydroelectric Power ◽  
Hydroelectric Power Plants ◽  
Need To Evaluate ◽  
History Of ◽  
Average Control ◽  
Installed Capacity

ABSTRACT Small hydroelectric power plants make up 6 GW of installed capacity in Brazil. However, electricity generation at the plants has been below their expected Assured Energy Levels (AELs) recently. This paper analyzes the flow history of 24 plants using exponential moving average control charts in an attempt to verify whether climate change or land use and occupation could have changed the average annual flow available in the basin over time. The graphs showed neither a decreasing or increasing trend in average flows, but rather showed a recurring number of out-of-control points, which proves the sensitivity of assured energy to hydrological variations and the need to evaluate the use of daily average flow rates for calculating and analyzing the energy generated by small power plants.

scholarly journals Russian hydropower under the global climate change

2019 ◽  
Vol 484 (2) ◽  
pp. 156-160
Author(s):  
V. V. Klimenko ◽  
E. V. Fedotova
Keyword(s):  
Climate Change ◽  
River Runoff ◽  
Power Plants ◽  
Global Climate ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power ◽  
Ensemble Averaging ◽  
Climatic Scenarios ◽  
Qualitative Pattern ◽  
Integral Assessment

The influence of the climate change in Russia on the operation of hydroelectric power plants during the 21st century is considered. For obtaining quantitative assessments, the results yielded by global climatic models for river runoff were subjected to ensemble averaging. In addition to the standard RCP climatic scenarios, the MPEI scenario is considered, the fundamental distinctive feature of which is that the most likely development trajectories are selected. It is found that the choice of a scenario has an essential effect on both the qualitative pattern of river runoff changes over the territory and on the quantitative characteristics of this process.An integral assessment for the change in the hydroelectric power plant outputs due to climate change is made.

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