PBOM Estimation Generation
To perform budget estimation calculation, associate the turbine type arrangement scheme PBOM, turbine foundation scheme PBOM, route scheme PBOM, platform scheme PBOM, substation scheme PBOM, and power line scheme PBOM output by Greenwich, set up wind farm financing parameters and land property, and click Calculate to generate the overall PBOM and budget estimation of the wind farm project.
- Complete the calculation of the PBOM of each associated unit project scheme and the PBOM template of every unit project must be the same.
- Fill in the financing parameters according to the project condition and keep consistent with the successive economic evaluation parameters. Financing parameters are applied to calculate dynamic investment and total investment. (Refer to the economic evaluation design guide for more information of these parameters.)
- Fill in the wind farm land form type according to the actual situation found in site reconnaissance. This would impact the recommended material price in PBOM.
- After the wind farm PBOM is generated, the engineering quantity of each unit project is not editable in designed budget estimation mode. Only unit price is editable. The engineering quantity of wind farm PBOM other than those of unit projects is editable.
- Check the budget estimation overview page for the unit indices of each unit project, scheme details, and unit price, judge the cost level, and adjust the material price in the PBOM.
- Since the recommended prices in unit price library are updated by quarter and the prices are only in average level but not applicable in all projects, adjust the prices according to the project phase, customer requirements, price range, inquiry, and other conditions of the project. Refer to following table for method and range of adjustment. Adopt the default value if no special specifications are provided.
| Project | Cost and recommended value range |
|---|---|
| Turbine | Acquire from manufacturer and turbine type inquiry |
| Tower (anchor) | Tower is 8000-10000 RMB/t and anchor is 12000-13500 RMB/t. Refer to the recent bid price of the same region. |
| Hoist | It is related to hub height. It is about 300,000 RMB for 90 m and 550,000 RMB for 140 m. Depending on the actual situation, add a large-scale device in and out fee, 300,000 - 500,000 RMB for centralized project and 1,000,000 - 1,500,000 RMB for distributed project. |
| Turbine transformer and low-voltage cable | It is related to turbine transformer model and cable type. Generally, the price is 110 - 130 RMB/kW and the turbine transformer is 200,000 - 300,000 RMB. |
| Foundation (not including anchor) | It is related to turbine hub height and geological condition. The price of a natural extended foundation is 500,000 - 700,000 RMB and the price of a pile foundation is 1,000,000 -1,200,000 RMB. |
| Platform | It is related to terrain and geology. On flat ground, the price is 10,000 - 100,000 RMB for a platform and 100,000 - 300,000 for hilly area. |
| Route | The price of newly constructed route on flat ground is 150,000 - 300,000 RMB/km, for rebuilt and expanded route on flat ground is 100,000 - 150,000 RMB/km, for newly constructed route in hilly area is 300,000 - 600,000 RMB/km, and for rebuilt and expanded route in hilly area is 200,000 - 300,000 RMB/km. |
| Infield power line | The price of 35 kV cable is 300,000 - 400,000 RMB/km. The price of 35 kV aerial on flat ground is 350,000 - 450,000 RMB/km. The price of 35 kV aerial in hilly area is 400,000 - 600,000 RMB/km. |
| Booster station |
35 kV switching station: 6 million RMB 110 kV - 50,000 preassembled substation: 15 million RMB 110 kV - 100,000 preassembled substation: 20 million RMB 220 kV - 100,000 preassembled substation: 25 million RMB |
| Forest and land levy | Refer to the project price of the same category in the same region. It is recommended to collect levy price information during feasibility study material collection. |
| Budget reserve | The ratio range is 1-3%. Input 2% in feasibility study phase and 1.5% in initial design phase. |
| The early-stage expense, reconnaissance expense, design expense, project management expense, etc. | The expenses mentioned here are related to wind farm capacity and owner management level. |
| Environmental impact assessment and water conservation expense | The expenses mentioned here are related to the environmental impact assessment and water conservation policy and are closely related to wind farm capacity and route length. Refer to the price list in the environmental impact assessment and water conservation report. |
| Outgoing power line | According to the project phase and condition, estimate the price based on outgoing length and unit cost or calculate it based on design scheme. |