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1、Feasibility Research ReportOf 5 MW On-Grid PV Power System Project in SamoaCEEG2009-8-4Table of Contents1. General introduction1.1 Overview1.2 Solar energy resources and geographical/meteorological conditions1.3 Engineering geology1.4 Task and scale of project1.5 Project design 1.6 Technical design1
2、.7 Fire protection1.8 Organization structure design1.9 Engineering management design1.10 Environmental protection and soil/water conservation1.11 Labor safety and industrial hygiene1.12 Engineering budgetary estimate1.13 Energy saving and emission reduction benefits2. The construction conditions of
3、Samoa2.1 Solar radiation condition2.2 Location Term2.2.1 Site Location2.2.2 Construction site conditions2.2.3 Geographical landforms2.2.4 Geology situation2.2.5 Site conclusion2.3 Climate characteristic (provided by customer, need ten-year meteorological data)3. The basic conditions of electric powe
4、r system in Samoa3.1 Basic conditions of power construction3.2 Supply condition of power system3.3 Demand condition of power system (need balance table of electric power)3.4 The problem of power system3.5 The development plan of power system4. Design of solar photovoltaic power station4.1 Design of
5、solar arrays4.1.1Selection of PV modules4.1.2 The efficiency evaluation of on-grid PV power system 4.1.3 Radiation calculation of the inclined surface of solar array 4.1.4 Series-parallel plan of PV system4.1.5 Layout of PV array4.1.6 Civil engineering design4.2 DC combiner box design with lighting
6、protection for PV array4.3 DC power distribution cabinet design4.4 Selection of PV grid-tie inverter 4.5 AC power distribution cabinet design with lightning protection4.6 AC step-up transformer design4.7 Block diagram of system program4.8 Design of interface to power grid4.9 Program improvements4.10
7、 Construction design4.10.1 Construction condition4.10.2 Transportation of construction4.10.3 Permanent land for construction4.10.4 Main part of construction4.10.5 Installation of PV array4.10.6 Arrangement of construction5. Environmental impact assessment in construction phase and measurement of emi
8、ssion reduce 6. Public benefits6.1 Promote tourist industry6.2 Create job opportunities 7. Prediction of electricity generation 7.1 Electricity generation in first year7.2 Electricity generation in 25 years8. Investment cost and recovery8.1 Static investment evaluation8.1.1 Project construction cost
9、 budget8.1.2 Maintenance fee8.1.3 Total static investment8.2 Revenue of electricity generated8.3 Comparison of static investment and revenue8.4 Recovery of static investment 9. Introduction of CEEG1. General introduction 1.1 OverviewSamoas 5MW on-grid PV demonstration project is located in Polynesia
10、, the southern equatorial region. Its geographical coordinates: 13.82S, 172.01W, the average altitude of 63m. The site is open, flat, easily accessible and convenient. (Specific location can be found in the attached map in Fig.1.1).Fig.1 The location of PV power stationThe PV power station covers ar
11、ound 100,000 with a length of 563m and a width of 180.5m. According to the analysis of solar energy resources pre-installed requirements and optimized layout, 17,920 280W modules, 998mm (width) 1956mm (length) for each module, will be installed in the 100,000 area. The total capacity of PV power sta
12、tion is 5.0176MW and will generate around 7,752,900 kWh each year.1.2 Solar energy resources and geographical/meteorological conditionsAccording to regional solar radiation data and analysis, solar resource in the project site has several features in the following conclusions:1.2.1 The project is lo
13、cated in rich solar resource area of SamoaAccording to NASA solar radiation data measured in the past 30 years, the average amount of solar radiation is 6,908.1MJ/m2, the average hours of sunshine are 3,313 hours.1.2.2 Choose the best angle of PV array can effectively increase the amount of radiatio
14、nBased on the NASA database on Samoas radiation with different inclined angle, the optimum for PV panel installation is 18.9. Then the PV panel will receive maximum radiation of 7053.9MJ/m2 throughout the year.1.3 Engineering geologyThe project Site is covered by plant but no river, lake in the arou
15、nd. The distance to the airport is about 400m and the airport highway in the north. No residents live in the surrounding area, nor does any mining factory. (More information is required to be provided by customers, focused on the geology conditions, which should meet the construction requirement and
16、 the effect on construction.)1.4 Task and scale of projectThe location is ideal for PV power plant because of the rich solar resource, convenient transport and grid connection condition. Samoas 5MW on-grid PV demonstration project will adhere to the principle of world sustainable development of ener
17、gy, in line with the national energy strategy which calls for reducing consumption of fossil resources and harmful emissions such as coal-fired pollution. So this project will play an important role in promoting the local tourism and local economic development. Therefore, the development of this pro
18、ject is vital necessary.1.5 Project designThis project uses distributed generation and centralized grid connection strategy. The whole system will be divided into five 1MW units and connects to local grid at 22kV voltage point through five 0.4/22kV transformer. The whole system has 17920 280W mono-c
19、rystalline PV panels, the actual output 5.0176MW. For each 1MW subsystem, there are four 250kW grid-tie inverters. Each 250kW inverter consists of one DC power distribution unit, in which there is 10 DC combiner box with lightning protection, 6 inputs for each combiner box and total 56 inputs for 1M
20、W unit. For each input, there is one PV string with 16 panels in series. So 1 250kW inverter has 896 PV panels input, and 3584 PV panels input for 4 inverters. At the output of each inverter, there is an AC power distribution cabinet with lighting protection, and connecting to a 1250kVA 0.4/22kV ste
21、p-up transformer. 1.6 Technical design1.6.1 Main power system designSilicon PV module is CEEG SST280-72P, mono-crystalline, the standard power of 280W, the peak voltage of 35.5V. Grid-tie inverter is SG250KTL, maximum power tracking voltage range DC450V 880V, output power 250kW, the output voltage 2
22、70V, Europe efficiency 98.3%, total 20 grid-tie inverters for PV power system.Five 0.4/22kV distribution transformers connects to one 22kV distribution connecting point, 5 input and 1 output, then to local 22kV class grid.1.6.2 Central control system designThe department of electric power in Samoa w
23、ill take charge of the project and take few-people attended method. Tele-control workstation will be used in the control room for information transmission to and monitoring from dispatching department. The automation system achieves 22kV line, the main transformers, the centralized monitoring and di
24、spatching department tele-control monitoring of AC switch cabinet.20 grid-tie inverters will be applied in the project. The monitoring and protection of each inverter is achieved by its inner detecting system and protection device. 1 set of environmental monitoring system is equipped to monitor the
25、environment conditions. Power measurement of the PV power station will be at the interface point to the grid.1.6.3 CommunicationThe communication of Samoas 5MW on-grid PV power project includes system communication, administration communication and inner station dispatch communication.1.6.4 Construc
26、tionThe total capacity of the project is 5.0176MW with 17920 280W solar modules, 1120 supports of fixed installation style, five 1250KVA transformers and interface to grid through 22KV class power line. Civil engineering of the PV power station includes base of PV modules, five AC and DC power distr
27、ibution rooms, comprehensive building, comprehensive pumping station, sand-proof wall, inside road, etc. According to (GB 50011-2001）, the Comprehensive Building, AC-DC power distribution room, and comprehensive pumping rooms belong to C categories, seismic intensity of 7 degrees, the basic design o
28、f the ground acceleration value of 0.10g.According to site conditions, solar module follows the basis of 50m / s design. Single array takes concrete reinforcement and grade of C25. The base is 0.4mm higher than site average, the depth 0.6m, and the concrete pouring of one point is 0.256m3.The PV pow
29、er station in the windy area, the combination of engineering and biological means will be adopted for wind proof at this stage. That is, building 2.5m height wall around the PV power station and planting poplar outside of the wall. Whats more, PV modules, supports and bases are sand-proof designed.1
30、.7 Fire protectionA. PV power station is not equipped with firefighting organization, but a part-time firefighter should be employed. At initial stage, fire will be handled by personnel from the internal station, and meanwhile with notification of the local fire brigade to fight against fires;B. The
31、 fire engineering design of the project adopts the integrated fire technical measures include the fire prevention, monitoring, alarm, control, fire fighting, smoke exhaustion, and escape. The aim is to reduce the possibility of fire. Once happens, it can be extinguished in a short time and the loss
32、can be reduced to a minimum, while ensuring the safety of fire evacuation;C. PV power station fire control room is integrated designed with the main building control room;D. Fire facilities and equipments are set according to the importance of production and the degree of fire risk;E. Fire service p
33、hone is installed for each important site in PV power station.1.8 Organization structure designThe site is nearby Samoa airport, geographic location is 13.82S, 172.01W. The transport is very convenient, and all construction material of the project can be provided by local supply.According to constru
34、ction schedule requirements, main construction establishment are located nearby the comprehensive building, mainly including: producing area, living area, construction warehouse, reinforcing steel bar yard, machining filed, temporary construction establishment, etc.Project land usage inside the wall
35、 is 100000m2. The total construction period is 10 months, in which the project preparation period is 3 months.1.9 Construction management designTemporarily, the organization structure and personnel set of this PV power plant should refer to those of similar project and be according to the practical
36、conditions of this project. The number of the personnel for this project should be 9. 3 out of 9 are responsible for management and production, 6 out of 9 are responsible for operation, including 2 shift foremen and 4 duty officers. The facilities of the PV plant include general control building, ma
37、in and back up electricity, and water supply facility for production and life.1.10 Environmental protection and soil/water conservationAfter investigating and analyzing the location and surrounding area of 5MW PV power station in Samoa, we found that building the PV power station will bring both goo
38、d and bad effects to natural and social environment. On the one hand, solar energy is clean and renewable energy. It will improve the quality of environment by significantly reducing solid and gas waste of coal-fired power plant which cause air pollution. Meanwhile, it will be a new tourist attracti
39、on to promote local tourism and economy development. On the other hand, during the construction of the PV power station, it will produce dust, noise, waste water and daily rubbish. But these bad effects can be controlled and eliminated by taking protection measures and strict construction management
40、.In conclusion, as long as taking proper protection measures, the construction of the 5MW PV power station in Samoa will not lead to any significant environment problems, more over, PV power is a clean energy, and it brings sustainable use of natural resources and the sound cycle of eco-environment.
41、 The construction of this project is feasible. 1.11 Labor safety and industrial hygieneAccording to the features of this solar plant, we have designed a complete project monitoring system to ensure the safety of main buildings during the construction and operation periods. We suggest that a sound mo
42、nitoring system should be made to control the actual operation, comprehensively evaluate the safety of main parts, and come up with prevention and improvement measures to prevent accidents in advance.During the construction period, the main safety problems are the possible accidents caused by electr
43、icity and fire which may lead to explosion. After the project finished and put in operation, the most important work for daily labor safety should be to prevent these accidents.The early warning system, emergency rescue measures and plans should be made in advance to improve the ability to deal with
44、 heavy accidents. The occupation safety and health management system (OSHMS) should be made and completed in the practice, eventually achieving the goal of preventing and eliminating accidents, occupational hazards and other loss.1.12 Engineering budgetary estimateThe project investment budget is ma
45、de according to the national, departmental and currently domestic related regulations, cost and rate standards, etc. The price of raw material and equipment is based on the price level of the third season in 2009. Total investment is 30,647,354 US Dollars. The details are included in Form 9. 1.13 En
46、ergy saving and emission reduction benefitsThe average amount of output produced by the 5MW PV power station in Samoa will be 7.7529 million kWh. Based on net coal consumption rate 340g/(kWh), every year the PV power station could save 2,600t standard coal which is equal to 3,600t raw coal compared
47、to coal-fired power plant. Correspondingly, it will reduce the amount of atmospheric pollutant, including 50.1t SO2, 0.67t CO, 0.28t CnHm, 28.3t nitrous oxide with respect to NO2, 6200t CO2, and 800t gray carbon residue.2. The construction conditions of Samoa2.1 Solar radiation conditionTable 1 Sola
48、r radiation data table in SamoaTable 2 Monthly solar radiation curveTable 3 Other metrological data in SamoaAccording to the data tables above, Samoa is rich for solar with the day average radiation 5.25KWh/m2. Other data like the temperature (near 25), medium wind and rainfall, shows the area is suitable for PV power statio
