Recently, the National Energy Administration officially issued the red headed document of the notice of the comprehensive Department of the National Energy Administration on submitting the pilot scheme of roof distributed photovoltaic in the whole county (city, district). The notice points out that the proportion of photovoltaic power generation that can be installed in the total roof area of Party and government organs shall not be less than 50%; The proportion of photovoltaic power generation that can be installed in the total roof area of public buildings such as schools, hospitals and village committees shall not be less than 40%; The proportion of photovoltaic power generation that can be installed in the total roof area of industrial and commercial plants shall not be less than 30%; The proportion of photovoltaic power generation that can be installed in the total roof area of rural residents shall not be less than 20%.
Today, Beijing Multifit Electrical Technology Co., Ltd. will take you through the whole process of industrial and commercial photovoltaic development!
1.Pre-development
1-1 finding project resources
1-2 preliminary communication with the owner
1-3 preliminary data collection
1-4 site survey
1-5 technical scheme calculation
1-6 determination of development intention
1-7 signing relevant agreements
1-1 finding project resources
Photovoltaic project resources that can be developed
Industrial Park / Development Zone | sowntown |
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Large industrial and mining enterprisesNational high-tech industrial park Local high-tech industrial parks logistics park Bonded Zone Economic development Zone Sewage treatment plant and other industrial plants | hotels Office Building stadium airdrome railway station Large business center Supermarket and other commercial facilities |
Distributed pv development should be followed
The principle of "adjusting measures to local conditions, clean and efficient, scattered layout, nearby use"
1-2Preliminary communication
Establish contact with the plant owners, interview with the plant situation, roof structure, electricity level and other basic issues, and determine the cooperation willingness and energy use demand.
Through the data and satellite map, the following aspects are investigated to determine the feasibility of the project.
Investigate the enterprise attributes (state-owned enterprises, listed enterprises, well-known foreign enterprises), whether the credit is good, operating conditions and income is stable, no bad record.
Check whether the building property right is independent and clear (the original property ownership certificate, land certificate, construction planning permit), and whether the building property right is pledged.
Investigate the roof structure (concrete, color steel tile), the service life and area of the roof (at least 20,000 square meters).
Investigate the electricity characteristics, time-sharing electricity quantity, electricity price, voltage grade and transformer capacity.
Check whether there is shelter or building planning around the building, whether there are gas or solid pollutants around the building.
Investigate the owner's cooperation willingness, the preliminary communication cooperation mode (self-use, surplus power Internet).
1-3Preliminary data collection list
data name | ask | remark | |
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Credit review | Business license of the building owners | scanning copy Or photos As-built drawings CAD or scanned pieces photograph | ✔ If the property ownership certificate is being handled, the housing management department needs to issue the receipt of the received materials, and the property ownership certificate must be obtained before the photovoltaic grid connection. ✔ If the building user and the property owner are the same, if the building user is only the lessee, does not have the property right, and is the future photovoltaic consumer, it needs to negotiate with the property owner to agree on the right to use the house. ✔ checks whether the building is mortgaged, and if mortgaged, you need to communicate with the mortgage unit. |
| Proposed photovoltaic plant property ownership certificate |
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| Proposed photovoltaic plant land certificate |
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| Proposed photovoltaic plant construction planning permit |
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Plant conditions | General flat map of the factory | photograph scanning copy Or photos As-built drawings CAD or scanned pieces | ✔ plant layout, plant structure, electrical system, etc The ✔ provides the drawings for each plant building The ✔ calculates the roof load of each plant building ✔ predicts photovoltaic capacity, 0.6MW for 10,000 square meters of concrete roof and 10,000 square meters, and 1MW for 10,000 square meters of color steel tiles |
| Plant structure diagram |
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| Building diagram of plant |
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| Plant area electrical system diagram |
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Roof condition | roof type | photograph | ✔ concrete roof / color steel tile |
| Decoration situation in the workshop | photograph | ✔ specifies whether there is a suspended ceiling |
| Roof life |
_ | The service life of ✔ concrete roof is long, which can generally guarantee the photovoltaic operation period of 25 years. |
| Color steel tile laying time |
_ | The use of ✔ color steel tiles has waterproofing and maintenance issues, considering additional costs during the operating period. |
| Color steel tile thickness |
_ | _ |
| Color steel tile type | photograph | ✔ determines type (T, angular, upright lock) |
| Color steel tile color | photograph | _ |
Power consumption | Electricity bill of settlement | scanning copy | ✔'s recent electricity bill list for at least 12 consecutive months |
| load curve |
| ✔ reflects the power load and power time, so as to judge the proportion of photovoltaic self-use, the higher the proportion, the better the benefit. |
Production situation | Construction time of plant |
_ | ✔ specific to year month |
| Working hours for workers |
_ | The ✔ distinguishes between day and night work hours |
| Holiday production situation |
_ | ✔ on weekends and holidays, to determine the annual production days |
| Workshop production |
_ | ✔ defines the products and processes produced |
1-4Field survey on site
After completing the preliminary evaluation of the project, the EPC team made a visit to the target enterprise.UAV aerial modeling was used to compare whether the architectural drawings were consistent with the actual situation, and the internal structure and roof of the plant were reviewed and photographed.
Photovoltaic access system aspects
other aspects
Brand and size of circuit breaker, brand and model of access line switch cabinet, reactive power compensation capacity and condition.
How valuable is the type of items in the factory building.Is there a water source point to clean the photovoltaic system.
1-5Technical scheme calculation
Assess the overall operation situation of the enterprise, and determine the cooperation mode adopted.
Focus of the project evaluation | |
Building property rights And the right to use | Building roof property right is clear Whether the ownership party and the use right party unanimously approve the project construction Can the Owner provide the corresponding convenient conditions for the project The ownership life and life of the building roof is more than 25 years |
building structural style | Entrust the original roof design unit or a third party to calculate the roof load, and issue the certificate of meeting the photovoltaic installation conditions Whether the building structure can be strengthened can evaluate the difficulty and cost of reinforcement |
roofing | Roof waterproof form and aging degree Assess the difficulty and cost of waterproof repair |
sthenosage | Project cooperation mode Is the project economy feasible |
project investment | Access distance of distributed PV Site construction is difficult and easily difficult |
1-6 Establish development intention
Actively communicate with the enterprise owners, sign agreements, and enter the project filing stage.
2On-grid acceptance
2-1NDRC project filing
County and district development and reform commission project record
data name | remark |
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Distributed power supply project application form or project application Report | Including the project implementation site, the source of investment funds, the simple explanation of the income, the owner situation, etc. |
Enterprise investment projects | Company information, enterprise legal person business license, etc. |
Record form | _ |
investment in the fixed assets | Roof (building) property certificate, owner authorized materials (such as roof lease contract), electricity sales agreement, etc. |
Project energy-saving registration form | Roof plan, roof safety bearing capacity proof materials (issued by the qualified design unit), etc. |
2-2Power grid company access approval
Get the county and district power grid company access approval
data name | remark |
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The Distributed Power Supply Project Application Form | Including the project implementation site, the source of investment funds, the simple explanation of the income, the owner situation, etc. |
Enterprise data | ID card and photocopy of the operator, original power of attorney of legal person, business license of enterprise legal person, etc. |
Preliminary data of the power generation project | Property ownership certificate or land certificate, roof lease agreement, electricity sales agreement, roof compression and roof area feasibility proof, fund certificate, etc. |
National Development and Reform Commission | _ |
User power grid related information and system access report | _ |
The power supply bureau accepts the application for grid connection | Free access plan, out of the network opinion letter. |
List of main electrical equipment | Including: photovoltaic modules, inverters, transformers and other equipment (grid-connected equipment selection should meet the national safety, energy saving, environmental protection requirements). |
3Design and construction
After receiving the record and access approval, the EPC and the enterprise determined the design scheme, and the project entered and started smoothly.
scheme design | Procurement bidding |
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✔Preparation of the feasibility study report ✔Preparation of project approval report or project application report Preliminary design of the ✔ Project | ✔EPC Procurement Bidding for Project ✔ project supervision and procurement bidding ✔ main equipment and materials procurement bidding |
detail design | Construction implementation |
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✔ field mapping, geological prospecting, demarcation, put forward design requirements ✔The access system report is prepared and the construction drawing and blueprint are reviewed ✔ professional drawings (structural, civil, electrical, etc.) ✔ Field Technical Exchange ✔The delivery line will be reviewed in the initial feasibility study, and will issue the power grid access opinions | ✔ equipment procurement ✔ photovoltaic system construction work ✔ Electrical connection, protection and debugging, monitoring and installation of all equipment, etc ✔ unit project commissioning report / record power generation system before grid connection cannot trial operation ✔ Acceptance report / record of unit works before grid connection |
4On-grid acceptance
Industrial and commercial photovoltaic projects are generally divided into three stages. The first stage is for project evaluation and contract signing, the second stage is for filing and access procedures, and the third stage is for construction and grid connection.
02.The power grid company accepts applications for grid connection acceptance and commissioning
03.Sign the power purchase and sale contract and the grid connection dispatching agreement with the power grid
04.Install the gateway electric energy metering device
05.Complete the grid-connection acceptance and commissioning
06.The project is connected to the grid
