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RENEWABLE ENERGY
May 15, 2013
Reliability, Safety and Management Engineering and Software Development Services
Main Activities
May 15, 2013
The Main Activities of REL renewable energy:
Project development, Design, Construction, Supervision, Project management :
Hydro energy
Wind energy
Solar energy and energy efficiency
″Kozloduy″ Hydro Power Plant
→ Bypass Canal
North-Western Bulgaria – on the NPP Kozloduy Site, on the End of the 7 km long warm-water discharge canal
Designed by Risk Engineering Ltd. Hydraulic Equipment from MAVEL: Turbines and Generators
Power House
″Kozloduy″ Hydro Power Plant (2)
Vertical Section Through the Power House
Design
″Kozloduy″ Hydro Power Plant (3)
Design (2)
Horizontal Section Through the Power House
″Kozloduy″ Hydro Power Plant (4)
Basic Data of HPP
Technology
Number of Units 2
Turbine Type Kaplan
Runner Diameter 2500 mm
Number of Runner Blades 4
Nominal Net Head 7,50 m
Nominal Discharge 1 Turbine 46,2 m3/s
Rated Power per Unit 2867 kW
Turbine Rotations 183 min-1
Generator Rotations 750 min-1
Installed Output per Generator 3600 kVA
Generator Voltage 20 kV
″Kozloduy″ Hydro Power Plant (5)
Building Site of HPP
″Kozloduy″ Hydro Power Plant (6)
″Kozloduy″ Hydro Power Plant (7)
“Studen Kladenets” HPP is the second power stage of Arda Cascade. The plant has been in operation since 1958. During the period of 2006 – 2009 Risk Engineering carried out extension of the HPP by two new turbine installation.
″Studen Kladenets” Hydro Power Plant
Турбина 16 MW
Екологична турбина 1,3 МW
HPP “Studen Kladenets” – new turbine layout
″Studen Kladenets” HPP (2)
A new penstock with length of 210,35m and diameter of 2800 mm placed in a tunnel is feeding the additional two units.
″Studen Kladenets” HPP (3)
Main dimensions of the extension Length 20,96 m Width 25,25 m Foundation elevation - 18,30 Crest elevation +21,85 Monolithic reinforced concrete structure. Used materials : 480 t steel, 8200 m3 concrete 10000 m2 formwork
Unit 5 - cross section
″Studen Kladenets” HPP (4)
Foundation rock is eroded andesite
Excavation was carried out by blast
Underground section of the building – 7900 m3
″Studen Kladenets” HPP (5)
External walls up to elevation +6,00 are reinforced concrete walls with thickness of 50 cm and were poured at once.
Reinforced concrete columns were poured at once up to elevation +11,63 as well.
Overground section of the building – 7500 m3
″Studen Kladenets” HPP (6)
Roof formwork
″Studen Kladenets” HPP (7)
Steel penstock was concreted by using of self compacting concrete mixture. Drill injection works were performed - contact and consolidation injection. Within the rehabilitation of HPP
“Studen Kladenets” REL performed delivery, replacement and adjustment of 5 inlet valves.
″Studen Kladenets” HPP (8)
Turbine Francis on vertical axis with rated capacity of 16 MW delivered
by VA TECH HYDRO
Ecological hydraulic unit type Francis with rated power of 1,3 MW, installed by Risk Engineering
″Studen Kladenets” HPP (9)
HPP “Studen Kladenets” after extension
″Studen Kladenets” HPP (10)
North-Eastern Bulgaria – the Dobrudzha Plane, on Arable Land, between the village of Ovcharovo and the village of Svoboda
Total covered area – 7800 ha
Geological Site Assessment
performed
Existing 110 kV Power Line Stretching through the Area
Location
″Ovcharovo-Svoboda″ Wind Farm
Wind Data
Two 60m High Wind Measuring Masts:
• Wind Speed • Wind Direction • Air Temperature • Relative Humidity • Barometric Pressure
Data available for about two years already.
″Ovcharovo-Svoboda″ Wind Farm (2)
Wind Park Model
Variant with 44 Vestas V112-3MW Wind Turbines, Hub Height 119m
Installed Capacity of the Park: 44x3 MW = 132 MW
Using two different software by Modeling the Wind Park: Windographer, WAsP
Terrain Map of the Wind Farm and Wind Frequency Rose
″Ovcharovo-Svoboda″ Wind Farm (3)
Results: - Wake Losses in the Wind Park and of Each Wind Turbine - Mean Net Annual Energy Production (net AEP) for the Wind Park - Other Characteristics
Wind Park Model (2)
″Ovcharovo-Svoboda″ Wind Farm (4)
Resource Grid, gross AEP, over the Site from Ovcharovo-Svoboda Wind Farm for VESTAS V112-3MW Wind Turbine with Hub Height 119 m
Wind Park Model (3)
″Ovcharovo-Svoboda″ Wind Farm (5)
Erection of the Wind Park: for Two Years – Two Building Seasons Grid Connection:
• Building a New Substation 20/110 kV in Proximity to the Existing 110kV Power Line
• General Written Agreement with the National Electric Company for the Connection of the Wind Farm to the National Grid Available
Feasibility Study Performed
Realization of the Project
″Ovcharovo-Svoboda″ Wind Farm (6)
Accumulated net Cash flow
-50
0
50
100
150
200
250
300
350
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Years
Mio
. E
uro
Accumulated Discounted net Cash flow
-20
0
20
40
60
80
100
120
140
160
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Years
Mio
. E
uro
Feasibility Study
″Ovcharovo-Svoboda″ Wind Farm (7)
Capital City of Bulgaria – Sofia, on the Roof of REL office
Office Building of Risk Engineering in Sofia
Photovoltaic Installation on the Roof
Photovoltaic Installation
Designed by Risk Engineering Ltd. Equipment from “ER Soll”, Germany:
- 198 Modules with Total Area 489 m2 and Total Weight 63 kg/m2
- Polycrystalline Silicon Cells, Each with Rated Power 3,65 Wp
Biggest Installations of Such Type in the
South-eastern Part of Europe
Total Installed Capacity – 54,8 kWp
PV Modules Assembly
Photovoltaic Installation (2)
Automatically Saved of the Data on Sunny Portal:
http://www.sunnyportal.com
Daily Reports
Energy Production
Photovoltaic Installation (3)
Monthly Reports
Energy Production (2)
Photovoltaic Installation (4)
PV Installation
Photovoltaic Installation (5)
11 Photovoltaic Inverters
PV Installation (2)
Photovoltaic Installation (6)
Capacity: 2.5 MW
Location: Parvomay, Plovdiv
Technical Details: • 290W monocrystalline panels: 8 680 pcs • 3-phase string inverters (max 13.8kW):
155 pcs • Grid connection at 20kV
Commissioned in 2011
Debar PV Plant
Capacity: 5 MW
Location: Elhovo, Yambol
Technical Details: • 280W monocrystalline panels: 18 144pcs • 3-phase string inverters (max 30kW):
168 pcs • Grid connection at 20kV
Commissioned in 2011
Elhovo 5 PV Plant
Capacity: 4 MW
Location: Elhovo, Yambol
Technical Details: • 260W polycrystalline panels: 15 228pcs • 3-phase string inverters (max 30kW):
141 pcs • Grid connection at 20kV
Commissioned in 2011
Elhovo 4 PV Plant
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