First, the cost efficiency is king, market selection is the first standard
Early large-scale power plants commonly used self-built cement room in the form of built-in inverter. Although the strength of the cement room and meet the requirements of life, but a long construction period, the project takes up a lot of time; large-scale photovoltaic power plants are mostly located in the desert plateau, high labor costs, difficult construction, building materials, transportation difficulties, resulting in cement room the overall construction costs are generally higher. Long construction period, high construction costs, in order to ensure construction quality and progress of the project, the owners of units had to arrange to hire professionals for guidance or supervision of the company on behalf of supervision.
The reason why the container program a launch on the market quickly, the primary reason is that the program works in construction time and cost advantages. Mainstream containerized general internal configuration of the inverter room 2 500KW inverter, depending on the requirements of owners can be further integrated DC power distribution cabinets and other equipment to form an independent photovoltaic power generation system unit. In addition to the simple ground and foundations, container program no other construction needs, by lifting directly placed in designated locations, good to meet the owners and EPC unit construction period of the project and the project cost requirements, and greatly reduces the difficulty of construction site risks .
Second, the integration of functional design, from products to solutions platform upgrade
Photovoltaic power plants of different application environment, to meet the cooling ventilation premise, inverter room needs to have good dustproof, waterproof, anti-corrosion ability. Container inverter room, the heat, protection and other functions to achieve the combination of inverter products, and provide owners with a personalized interior space, form an integrated functional design of the PV system access solutions platform. Container with sun power inverter example for analysis.
Sunshine Power Inverter containerized housing will inverters, DC cabinet integrated in one, using simple segmented vertical-type duct, the duct-free fan, zero loss, maintenance-free. Duct length is only 1m, small pressure loss, fan efficiency at its best state. Inverter at work, most of the heat is discharged through the duct outside the container, but also a part of the heat transferred by radiation inside the box, the internal flow of air to absorb heat to the top, and then discharged from the top of the container exhaust fan, ensures the inverter the long-term reliable operation.
Outside exhaust treatment, the same treatment should be integrated into the design of the wind. In addition the container side of the blinds, external cold air directly into the box by the side of the window, continuous flow in the back of the inverter, inverter heat way back from the original natural convection transformed into forced convection, convection heat transfer factor improved by nearly 10 times, greatly improving the heat transfer capability back, reducing the surface temperature; Moreover, persistent low level cold air formed around the inverter to inverter provides a good working environment.
Surrounding the container body additional insulation, the use of low thermal conductivity as rock wool insulation materials, laminated thickness of 50mm, can be effectively cut off from solar radiation and low temperature environment better insulation. S-shaped inlet box blinds patented design, effectively prevent the intrusion of wind and rain, dust and cotton are using a special high-throughput and low resistance filter cotton, reusable, simply press the blinds when replacing a dark button, you can remove the anti-cotton dust, the whole operation time is less than a few seconds.
In addition to cooling, insulation, protection of the integration of professional design, maintenance facilities also need to include the container platform design. Sunshine Power Inverter Built Container 500KW inverter and DC cabinet, using midline symmetrical placement to facilitate people to view device information and positive maintenance; inverter front door can be opened 160 °, which greatly improves the maintenance space; both sides of the container design the overall style double doors, providing a fast and convenient service channels, For large devices within the inverter to be replaced, the back double doors can be opened directly.
Not only in the photovoltaic industry and the power industry, as the global standardization of the large container, the container industry applications for the same program in multiple platforms.
Communications industry in the data center container originated from Sun in 2006's "black box scheme", which uses a standard 20-foot container, placed inside the server and power supply equipment, the obvious advantages of this design, and soon became the industry hot, now, IBM, HP, Google, Cisco, Microsoft and other giants have set foot (Figure 4), the product is used around the world, including deserts, coastal areas, its application is similar to the photovoltaic products.
Power industry, such as: electrical equipment manufacturer ACTIVEPOWER company, the battery manufacturer SAFT Group, and also a few years ago to join the ranks of containerization, which PowerHouse is ACTIVEPOWER company's major box-power products.
PV industry, SMA, Siemens and other foreign brands in 2009 began the introduction of container products, and widely used around the world. With significant cost advantages, construction efficiency and program platforms, with further expansion of photovoltaic power plant market, the scope of containerized inverter will be broader.
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