Installation and Construction Scheme of Support for Photovoltaic Power Station

- Jul 15, 2019-

v2-8

When the engineers of the Wanhos Solar Engineering Department provided customers with integrated solutions for photovoltaic power plant systems, many customers were not very concerned about the installation of the brackets, only to understand the conversion efficiency of the PV modules and inverters. For system integration brands like Wanhos, what we should do is: customer concerns, we must be honest and frank to answer the solution, the customer does not care and is extremely important in the actual operation, we It should be more clearly told to the customer that the system is reflected in the solution. Below, we will introduce the installation of photovoltaic supports for the experience and system solutions of the company.


From the installation form, the existing photovoltaic supports can be roughly divided into two categories: ground photovoltaic supports; roof photovoltaic supports. Common ground mounting form


Basic form:


1, hammer into the pile


It is convenient and quick to measure the distance at the installation site and directly use the pile driver to drive the column into the ground. Geological soil testing is required prior to installation to determine the appropriate penetration depth.


The following profiles are suitable for hammering into piles, depending on the actual situation:


advantage:


Fast and adaptable;


High cost performance;


Not subject to seasonal temperatures, etc.;


The piles are easy to remove and do not affect the reuse of the installation site.


2, spiral pile

When the installation site is too hard, or there are too many gravel, it is not convenient to directly hammer the column into the ground, you can use the spiral pile. Screw the screw-in steel into the ground and secure the column to it.

1

advantage:


Adaptable, flexible and diverse;


Not subject to seasonal temperatures, etc.;


The piles are easy to remove and do not affect the reuse of the installation site.


3. Precast cement foundation


If the installation site is not suitable for plug-in piles, you can choose to make the cement foundation. The brackets are placed on the cement foundation and bolted.

1562836236(1)

advantage:


Good strength and high precision;


Adaptable to the ground.


4. Direct cement pouring


Another form of cement foundation is to directly pour the bracket and cement together. This way. Compared with the above, the time for fixing the bolt connection is omitted, but the positioning accuracy of the support column is required when pouring.


advantage:


Good strength and high precision;


Adaptable to the ground.


Common ground support form


1, plug-in ground fixed form


Plug-in ground mounting bracket


Features:


1 The main body of the bracket is made of structural steel, the surface is hot dip galvanized, and the service life is more than 20 years;


2 The components have good compatibility and easy installation;


3 easy to maintain and maintain;


4 adaptability to the ground.


2. Ground truss type fixed form


Ground truss type fixing bracket


Features:


1The use of spiral piles is easy to operate (other ground fixing methods can also be used);


2 adapt to a variety of different types of geology;


3 beams with reinforced design of aluminum rails;


4 aluminum rails are designed with slots for mounting components, and the assembly is easy to install and fix.


3, the ground single column fixed form


Ground single column fixed bracket


Features:


1 Supporting aluminum guide rail specially designed for installing crystalline silicon components makes it easy to install and fix solar modules, reducing installation time;


2 The load-bearing parts such as columns and beams have been strengthened to meet the requirements of large working loads;


The wiring trough is integrated on the 3 beams to make the construction more convenient.


4, tracking bracket form


Single axis tracking


A tracking system that rotates around a one-dimensional axis such that the plane of the photovoltaic component is as perpendicular to the sun as possible.


Flat single axis tracking system


Oblique single axis tracking system


Structural features:


1. Self-balancing structure, reducing mechanical wear and prolonging the life of the motor;


2. Driven by slewing bearing reducer without gap;


3, the structure is simple, easy to install and maintain;


4. Make the consumable and consumable parts into standard products, and the motor maintenance and replacement are simple.


Control features:


1. Tracking the entire system without shadow occlusion;


2. The tracking system has a nighttime self-back function;


3. Adopt time control mode according to the sun's running track;


4. It has the functions of strong wind and heavy snow protection to improve the safety performance of the power station;


5, with network monitoring functions, to achieve centralized control, suitable for large power stations.


Dual axis tracking


According to the control method, the two-axis tracking system can be divided into time-controlled type and light-controlled type.


According to the geographical location and local time, the incident angle of sunlight is calculated in real time, and the photovoltaic module is adjusted to a specified angle through a control system, which is also called an astronomical control mode or a clock control mode.


The incident angle of the sunlight is measured by the sensing device, thereby controlling the rotation of the photovoltaic component and tracking the incident angle of the sunlight, which is also called the light sensing control mode.


Mechanical part:


1. Unbiased structure: the center of gravity of the grid overlaps with the axis of the mechanical structure, maintaining the balance of positive and negative moments, reducing the power consumption of the motor and prolonging the service life of the machine and motor;


2, weightlifting structure: reduce the vibration of the grid under running conditions, improve wind resistance;


3. Two sets of slewing bearings: good torque resistance and stable system.


Control section:


1. Automatic time-controlled tracking according to the astronomical algorithm of the sun's running track, with high tracking accuracy and no influence from the external environment such as weather;


2, standard industrial plug, with error-proof insertion, reverse insertion function, easy to install;


3. All external interfaces adopt photoelectric isolation measures, which have strong anti-interference ability and stable operation;


4, industrial communication interface, can easily constitute a monitoring network to achieve centralized control functions.


Common roof bracket form


1, flat roof fixed form


The flat roof mounting system is suitable for outdoor or flat roof loads.


Basic type


Basic flat roof fixing bracket


Features:


1. Applicable to any specification of crystalline silicon components and some thin film components;


2. The mounting surface is pre-buried with anchor bolts or similar cement foundation;


3. Design the installation angle according to actual needs.


Negative heavy


Negative heavy flat roof fixing bracket


Features:


1. It does not damage the original waterproof layer and does not require waterproof treatment;


2. Applicable to any specification of crystalline silicon components and some thin film components;


3. Install an adjustable weight frame on the bottom frame, and place cement blocks and stones on it;


4. Design the installation angle according to actual needs.


Baffle type


Deflector flat roof fixing bracket


Features:


1. Suitable for flat roofs with small load;


2. The installation angle of the component is 10-15°;


3. The deflector material is made of stainless steel or aluminum-plated magnesium-zinc plate;


4, do not destroy the original roof, do not worry about water leakage.


Color steel tile roof installation system


The roof of the color steel plate is mostly installed in a non-penetrating manner such as a buckle, a dark buckle or a seam, and a penetrative installation can be adopted under special circumstances.


First understand what is a color steel roof: steel that has been cold-rolled or cold-rolled. The steel plate is made of organic coated steel sheet (or colored steel sheet), galvanized steel sheet, anticorrosive sheet steel (including asbestos asphalt layer) or other thin steel sheets.


Color steel tile


Angle type


Common color steel tile fixing seat assembly


Installation Precautions


1. Firstly, the roof or the bamboo plank construction plank is repaired on the roof to avoid the second handling of the material and directly step on the roof panel, causing the roof panel to deform and the sealant to be disengaged and leaking;


2. Defining the position of the original structural roof rafter, and marking the specific position of the ink line; the connection between the bracket and the color steel plate must be at the position of the roof raft;


3, construction workers walking on the roof, must wear insulated soft-soled shoes, go trough, every day must remove debris on the roof panel to prevent corrosion and scratching the roof panel;


4. All positions where sealing paste needs to be applied must not be missed. After the roofing panel is installed, all the sundries and iron filings on the roof are removed. If the roof panel coating is scratched, it must be repaired with special repainting paint. If the rivet and self-tapping screws are empty, they should be affixed with rivets and sealing paste at any time. The rubber gaskets should not be damaged.


我的名片