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Analysis of the Classification Principle of Photovoltaic Intelligent Tracking System

Date:2021-04-06

In recent years, with the rapid rise of the domestic photovoltaic market, the cost of electricity continues to decrease, and the realization of grid parity has become the industry's consensus. And improve power generation efficiency and reliability has become the industry's main basis for the return on investment in photovoltaic power plants. Photovoltaic intelligent follow integrated system not only comprehensively improve the use of solar power generation efficiency of photovoltaic power generation, but also because it can be well suited to complex terrain, according to local conditions and other advantages, is being widely used in the photovoltaic industry.

Classification of photovoltaic tracking system

PV tracking systems are classified into fixed adjustable, flat single-axis, inclined single-axis and dual-axis trackers according to the adjustment angle of the bracket. According to the calculation, flat single-axis can increase power generation by 10%-20%, inclined single-axis can increase power generation by 20%-25%, and dual-axis can increase power generation by up to 40%. The reliability risk of flat single-axis is relatively low, while the risk of inclined single-axis and dual-axis is high

Flat single-axis tracking system

Benefit-cost comparison

The threshold of traditional mode fixed bracket is very low compared to tracking system, and the tracking system can better improve its power generation efficiency after achieving intelligence. CITIC Bo's flat single-axis tracking system adopts the world's first 2.0 high reliability redundancy design, dual motors for drive system, dual CPUs for control system and dual sensing system (electronic gyro) to realize closed-loop control, which can truly realize a tracking system that never stops for owners. Meanwhile, this flat single-axis tracking system can adapt to more complex terrain conditions and effectively meet the needs of adopting the tracking system on different sizes of plots and narrow terrains. tracking system.

In terms of cost performance, flat single-axis is more advantageous. Although the power generation efficiency of dual-axis is increased by 40%, its bracket cost reaches 3-4 yuan/watt, and the land resource occupation is two or three times of fixed bracket, so although the efficiency is improved, the first investment cost is great; the inclined single-axis is between flat single-axis and dual-axis, and the bracket investment cost and land resource occupation are about two times of flat single-axis. And flat single-axis system is divided into standard flat single-axis and flat single-axis with inclined angle. Under the same platform, flat single-axis with inclined angle can increase the power generation efficiency by 5-10% than standard flat single-axis, while standard flat single-axis can achieve 10-15% growth than traditional bracket and 18-23% with inclined angle. Therefore, the flat mono-axis is the best product in terms of overall PV power generation cost and comprehensive efficiency.

PV tracking systems bring a lot of benefits to PV systems. Thanks to the tracking technology, the PV panels can be adjusted at any time, and the power station will no longer be vulnerable to disaster weather. In addition, the installation of tracking system PV power plant, can be more closely integrated with agricultural production, in ponds, mountains, wasteland and other environments, flexible operation, than traditional power plants have advantages. Agricultural and fishery complementary systems can also be installed with PV tracking system. The system can realize the complementarity of agriculture, fish pond and PV, and truly maximize the owner's income under the limited land resources.

Oblique single-axis tracking system

PV tracking system principle: let the PV panel chase the sun.

The design principle of PV tracking system is not complicated. As the angle of the sun is always changing, the traditional fixed PV panels are no longer "dead" when using tracking technology, but can chase the sun like a sunflower to increase the amount of solar radiation received, thus increasing the overall power generation of the power plant.

Dual-axis tracking system

The all-terrain tracking system is designed according to different terrains and according to local conditions. The system can realize three to six rows of linkage, the middle for driving, the two sides follow the linkage, allowing a large range of slope, can realize 0-25 ° east-west, north-south 0-25 degrees, and allow the foundation settlement of 120 mm without manual intervention. With strong applicability to complex terrain, it can be constructed with the slope to give full play to its maximum light tracking effect and enhance its maximum power generation efficiency.

PV intelligent tracking system is also gradually widely recognized and used by domestic and foreign power plant developers. To improve the power generation efficiency of PV power plants, not only the efficiency and innovative integration of modules, inverters, cables, etc., but also the comprehensive efficiency of PV power plants can not be achieved without PV intelligent tracking system.

Reliability is the key to tracking system

From the viewpoint of the current photovoltaic bracket, the value of homogenization is more serious, many companies are obsessed with the pursuit of reducing costs to depress product prices, there are also enterprises low price competition pattern. Do product quality first, how to ensure the maximum efficiency of power generation in 25 years and the reliability of the product is the key. Its main is product quality and service; secondly, how developers look at the 25-year life cycle of the integrated efficiency, integrated value cost, can not just recently seeking low price competition, of course, we can design links, production links, to achieve lean management to reduce cost capacity and improve the cost-performance advantage.

First of all, from the product system design, theoretically solve the tracking system is reliable, whether the stability. On the one hand, we adopt the design concept of one main and one driven system with dual motors, and on the other hand, we automatically detect the switch according to the cloud technology platform to realize the promise of "never stop". At the same time, according to the different terrain, according to the local conditions, different process links to achieve all-terrain tracking.


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