After two years of downturn, the domestic photovoltaic market ushered in the Spring of the photovoltaic market, setting off a new round of large-scale power plant construction climax. Photovoltaic construction continued to benefit favorable policies in 2014 and the domestic photovoltaic market was further promoted. Combined with the current development of photovoltaic power plants, the problems that may be encountered in the development process are summarized below for your reference.
I. Funding issues:
Looking at the photovoltaic power station projects developed in China, there have been many conflicts arising from funding problems. There are conflicts between construction workers and foremen, conflicts between suppliers and subcontractors, and even workers’ strikes. In the final analysis, the incident is still a financial issue. In addition, the general project is located in a remote area. In case of urgent need of money in case of emergencies, it is impractical to seek support again. Therefore, the construction site also needs some liquidity. It is recommended that the on-site staff be responsible for the management of project funds and project payments.
Second, information, procedures:
1. Summary of renewal procedures:
2. Data consolidation problems: In the process of project implementation, the general contractor has a lot of information that needs to be sorted out and summarized, including the information of the subcontracting unit, resulting in a slow progress. There are no requirements for the document exchanges in written form, which results in no records after the implementation of some requirements and recommendations of the construction unit and the owner, which may cause some negative impacts on the settlement of the subsequent projects.
Solution: Train the resource clerk, systematically study the data production, make the template and form a stylized thing, which can be used directly in the future.
Third, electrical:
1. The grounding of the components is unsightly: The general component grounding is welded from the bracket to the main grounding grid. Flat iron can not enter the ground along the cement, it is not very regular.
Solution: This problem has not been solved at the scene. It can only be done as far as possible. You can try the following operations: After the construction team enters the field, the grounding of the entire site is completed, leaving a good balance and placing the flat iron in the foundation.
2. On-site guidance issues: Some equipment manufacturers do not provide technical personnel for on-site guidance. There is a problem with the equipment that needs to be contacted by telephone. Some questions cannot be understood when the telephone is understood for a long time.
Solution: When signing a contract, pay attention to adding equipment manufacturers to provide on-site guidance.
3. To optimize the design, to technical agreement, can not enter the problem of demolition of the wall: 135kV switchgear room equipment can not go, there is no way can only dismantle the wall. 2 The base of change is inappropriate.
Solution: Timely and supply the technical agreement required by the head office, the relevant person in charge carefully read, found the inadequacies in the drawings, promptly proposed and adjusted in time.
4. Problems with factory training: Some factory personnel come to the scene and if there is no equipment problem, they just drill in the dormitory. Ask them to do a training. They always say that there is no contract clause.
Solution: Add the terms of the manufacturer's training to the contract.
5. The issue of the threading tube turning at right angles: The wall tube inside the distribution box is a 90-degree right-angled elbow, which is particularly difficult to wear when threading in the later stages.
Solution: Consider wire diameters, use bends with smaller bends at corners.
Fourth, materials:
1. Damage to the back panel of the module: In the installation process, the backplane is scratched. Sometimes, if you are not careful, you will draw a seal.
2. The problem of component glass breakage: During assembly handling and installation, several components of tempered glass broke.
Solution: Workers are required to carry a piece of equipment and to deal with violators seriously.
3. Component Color Differences: When installing components, there is a serious chromatic aberration within each group.
Solution: Open the multi-box assembly and put it into one piece, picking up the colors in a group.
4. The stainless steel Screw lock phenomenon is serious: stainless steel screws used to install components are often locked.
Solution: 1) Buy a better screw; 2) When turning the screw, screw it slowly to reduce heat, preferably before wiping, and butter.
5. The problem of large error in bracket machining: There is a large deviation in the installation space of the left-secondary beam and the right-second beam of the bracket, and there is no adjustment. As a result, the installation of the battery board is not neat.
V. Civil Engineering:
1. Cable trench problem: The cable trench in the convergence area on the drawing is passed through the component. If it is constructed as shown in the figure, mechanical excavation can easily damage the components, artificial excavation, time-consuming and laborious, and delay the construction period.
Solution: Coordinate with the Design Institute and open the cable trench beside the road. This saves manpower and speeds up the progress of the project.
2. The problem of cooperation between the door and the door hole: The fire door of the inverter room is shaved off in varying degrees when installed.
Solution: First, when we measure ourselves, we tell the fire door manufacturer that we are measuring the size of the door opening. The other party should set aside the installation allowance. Second, fire door manufacturers are required to directly measure the door openings themselves.
3. The problem of the outdoor ladder of the inverter: The ladder outside the inverter room wall is reserved when the wall is masonry, but the thickness of the thermal insulation board was not taken into consideration at that time, which caused the ladder to be too tight from the thermal insulation board. people.
Solution: Remember to consider the insulation board thickness next time.
4. Problems in the wall of the inverter room's daughter: The inverter's outdoor insulation board is plastered and then plastered. It feels like a wall. It is actually an insulation board. This can lead to danger when people climb the ladder from the outside wall to the top of the inverter, climb to the end, and help the wall.
Solution: Add a ladder like a swimming pool.
5. The use of small red bricks below 5.±0.00, the problem of the cable groove brackets off: When the construction team builds a 35kV foundation, the perforated bricks are used below ±0.00, and the drawings are small red bricks. After communicating with the design, agreed to use porous bricks. However, when the cable bracket was later found, the bracket showed signs of shedding because the expansion bolts of the bracket entered the wall and entered the free space.
Solution: The repair scheme is to expand the bolts in the brackets to relieve the force of each expansion bolt. However, it is suggested that the construction must be done according to the plan next time.
6. The problem of insufficient concrete: At the beginning of construction, there may be a phenomenon that the concrete is not used enough. It is often a good template and the concrete cannot be poured.
Solution: Let the construction team on the mixing station.
Sixth, 35kV to send:
1. The problem of large winds affecting welding: The general power station project is located in the frontier winds, affecting welding.
Solution: Use a civil construction pouring template, nail a cover, welding in this cover, can windshield. But pay attention to fire prevention.
2. On-site construction There is no problem with roads: Line towers are generally located on the roadside, and are located more than a dozen meters from the road. In some places, vehicles cannot enter.
Solution: There is no good solution, because it will not fix a road for this project, but only pay attention to the choice of vehicle when doing the project again.
7. On-site management:
1. Waste recycling problems: The remaining cartons of the on-site assembly components and the remaining cable ends of the connected cables can be recycled and sold.
Solution: You can find a person who is responsible for this work, and let the construction party cooperate with it, arrange it well, and pay attention to wind protection. During the construction process, according to the actual situation, it can be sold in stages and save costs.
2. The problem of technicians arriving at the venue: There are some factory technicians who are slow to arrive at the venue. Delayed installation and commissioning.
Solution: Make up the surplus and let the factory technicians arrive in advance. First, there is time for us to explain the equipment and do the training. On the other hand, it will not delay the installation and debugging.
3. The question of who buys the material: Sometimes the material on the spot will find that it is not enough. At this time, it will require secondary purchases, and the secondary purchase will be unclear, leading to mutual wrangling.
Solution: Clear purchaser, issue written notice, purchase within a time limit.
4. The spool is blown by the wind: When the cable is put, the spool is generally set up for the convenience of the cable. However, the wind on the Bohu side is large and it is easy to blow off the spool.
Solution: When the line is set up, when the work is finished, remember to remind the construction party to put the spool down.
5. Benefits of equipment manufacturers and logistics companies: Equipment manufacturers depend on trusted logistics companies for their shipments, but equipment manufacturers often have economic ties with logistics companies. This caused the equipment manufacturers to send the goods detained at the cargo station.
Solution: I did not expect a good solution for the time being. I can only urge the manufacturer.
6. Management issues for the construction team: Formulating a management system for the construction unit can clearly inform the construction unit of its responsibilities and obligations in the project when it enters the site, so that it can comply with the rules set by the project department. No re-emergence of a subcontracting unit skipping the total package and asking for management fees from another subcontracting unit is re-emerged. It is recommended that a written version of the written agreement be signed and signed after each construction unit enters the market. It complies with the rules established by the project department.
7. The problem of on-site material management: The material management of the project is a civil construction unit, and its own materials can be properly placed. However, the personnel and materials of the external unit are ignored and disposed at will. The project also had many incidents that could not be piled up after the goods purchased by other construction units came in.
Solution: It is recommended that: 1) The construction unit manages the materials, establishes warehouses, and divides the regions. Each construction team has its own area. Each construction team has to leave a person to supervise the warehouse, and strictly implement the material entry and exit records. 2) The designated place of the construction unit shall be set up by the construction teams themselves and kept on their own.
8. The problem of cargo arrival: The arrival of goods at the project site is often unable to arrive on schedule, delaying the construction progress.
Solution: The supply company strictly controls the contract, and the contract should indicate the penalty method that does not arrive on time and strictly follows the contract.
9. The problem of material supervision: There is no wall around the site, and the gap between the fences is large. The material can be handed out from the fence and it is prone to theft.
Solution: Strengthen night patrols and arrange night shifts.
10. Equipment manufacturers should sign safety agreements when they enter the market and talk about good charging items: Before equipment manufacturers enter the site, they should also sign a security agreement and talk about what conditions they provide. For example, they only provide beds, do not provide bedding, and charge for meals.
11. The goods could not be delivered on time, resulting in the phenomenon of labor shortage: goods could not be delivered on time, resulting in worklessness.
12. Coordination between construction team and construction team: The construction team and the construction team do not agree with each other. When the cable is laid, the cable trench is often dug to dig a part of the earth, causing the cable to be installed in the electrical appliance to be placed only for a period, and then it is necessary to stop. Under the.
Solution: The construction unit should come forward to open several theme conferences and coordinate all construction teams. The construction unit should have macro-control, and if necessary, it can give orders to each construction team.
13. Problems with toilets: The scene is large, there are few toilets, and there are often urination events everywhere.
Solution: Several temporary toilets are built around the factory site. After the final use, they can be buried directly.
14. The problem that the site's civil waste is not cleaned up in a timely manner: The site's civil waste is not cleared in time, leading to poor cleaning of construction waste after the components are installed.
Solution: Urge the civil construction team to clean up the garbage in time.
15. The problem of bolts, nuts, gaskets, etc. dropping onto the ground is not easy to pick up: As there is a thick layer of loose soil on the ground, bolts, nuts, and gaskets are not easy to pick up on the ground.
Solution: Let the construction party prepare some magnets.
16. Into the scene, vehicle management is chaotic: the on-site vehicles are relatively easy to get in and out. There is no exit permit, and the inspection before going out can lead to the loss of on-site materials.
Solution: Vehicles must have relevant documents when they enter the scene. Ex-factory inspections should be added before leaving the factory.
17. Question about Linjianfang: The Linjianfang that was taken at the project site was a rock wool board and could only be used once.
Solution: You can buy a container and transform it into a temporary building so that we can complete a project that can be transported to another site. This saves money.
Eight, drawings:
1. Drawing Question: The general project is to carry out construction on the side of the blueprint, and the blueprint is always behind the construction.
Solution: According to the electronic version of the drawings, if the blueprint is inconsistent with the electronic version, let the design institute make a change.
2. The problem of urging diagram: The design task connected with the design institute is particularly large. Basically what the project is urging is the design of which project to do first. The general project will send someone to design at the design institute, and the drawing will be faster. However, when the special person is not in the design institute and returned to the department, the speed of drawing out will be slowed down immediately.
Solution: Specially arrange a colleague to urge the design institute to wait until the drawings are all finished before leaving.
3. There is no home representative of the design institute on the site: The design institute does not have a resident representative on the site. The problems in the drawings cannot be solved in time. You need to write feedback, then send an e-mail to the design institute, the design institute to write another reply, and then sign and stamp. , and then scan it again, it is time-consuming. And no one stared at the Design Institute, and the Design Institute responded slowly.
Solution: When signing a contract with the Design Institute, add a request to set up a factory representative.
4. Drawings were too late, and a large number of design changes occurred in the later period. There were too many problems in acceptance.
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