Application issues of micro inverters in BIPV scenarios

Publisher:茶叶侠Latest update time:2020-08-04 Source: 来源:禾迈光伏逆变器Author: Lemontree Reading articles on mobile phones Scan QR code
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Building integrated photovoltaics (BIPV) is a new concept in the application of solar power generation. Simply put, it is to install solar photovoltaic arrays on the outer surface of the building's envelope to provide electricity.

It is a form of architecture, a cross-border integration of the photovoltaic and architectural fields, and adds power generation elements to the external protective structure of the existing building. The photovoltaic building materials that bear the power generation function need suitable light to produce electricity, so the external protective structure area of ​​the building is a suitable place for its installation.

According to the different ways of combining photovoltaic arrays with buildings, photovoltaic building integration can be divided into two categories: one is the combination of photovoltaic arrays and buildings; the other is the integration of photovoltaic arrays and buildings.

In the past, photovoltaic materials were widely used in ground power stations. With the development of the diversified construction market, photovoltaic buildings in the form of photovoltaic curtain walls were proposed as early as the beginning of 2000. With the advancement of photovoltaic power generation materials, the integration of architecture and photovoltaics has become possible. The demand for photovoltaic materials in energy-saving buildings has made photovoltaic buildings increasingly valued by the construction industry.

In the selection of building photovoltaic materials, the role of the inverter is crucial. The inverter can convert solar energy into direct current electricity, and then convert it into single-phase alternating current electricity suitable for various equipment. However, traditional inverters have shortcomings, installation, safety hazards and other problems.

Shadow is one of the influences. Shadow is mainly caused by bird droppings, dust, tree shade, etc. Therefore, when choosing the best location to install photovoltaic modules, try not to install modules in places with shadows. If it is unavoidable, choose a suitable module placement method to reduce the impact of shadows. In daily operation and maintenance, pay attention to the cleaning of photovoltaic modules and clean up foreign objects such as dust in time.

From the perspective of the system itself, the implementation of multi-channel MPPT will reduce the impact of shadow shading. For example, the micro-inverter photovoltaic system is a fully parallel design circuit, and each component has an independent MPPT, which can achieve maximum power output, so that shadows, dust, and leaves partially block the solar panels, and there is no short board effect, eliminating the mismatch problem caused by component shading, orientation and angle, and greatly improving power generation.

In building-integrated photovoltaic (BIPV) systems, the installation of solar cell modules first involves the installation angle and direction of solar modules. Photovoltaic systems installed above or inside buildings must have a rapid shutdown function to reduce the risk of electric shock to fire rescue personnel. The integration of inverters and photovoltaic modules can achieve modular design, plug-and-play, and simple and convenient system expansion. It does not occupy installation space independently, and distributed installation is easy to configure, which can make full use of space and adapt to applications with different installation directions and angles.

Therefore, photovoltaic materials that can cope with different scenarios, provide shadow shielding, perform exterior decoration, waterproofing and other functions, while also taking into account power generation and serving as photovoltaic building materials, play an important role in the integration of photovoltaic buildings.

In addition, in traditional photovoltaic systems, there is a high tolerance for missing component-level data, but in BIPV systems, the inability to understand the operating status of each component in real time will pose a huge safety hazard.

Fault points that are difficult to locate in conventional photovoltaic power plants are even more difficult to troubleshoot in BIPV projects, so component-level data is crucial for operation and maintenance.

Through the Holmium monitoring platform, the working status of each component at all times can be accurately grasped, and the physical location of the component can be accurately located;

If a component has a problem, it can be discovered from the power generation/generation of the component, and further analysis can be performed to find out the cause and solve the problem. The operation and maintenance method can be selected according to the situation.

As the world's fastest-growing module-level inverter brand, Holmium has provided safer, more efficient and intelligent MLPE solutions for thousands of photovoltaic power stations in more than 80 countries and regions including Europe, America, Asia, Africa and Latin America.

Module-level MPPT tracking technology eliminates the wooden barrel effect, is not afraid of shading, and effectively extends the system's power generation time in weak light conditions. The power generation is 5%-30% higher than that of traditional photovoltaic systems.

With IP67 protection level and passing North America's most stringent 6000V surge test, the product is more reliable, with a designed service life of 35 years and a 10-year standard warranty, which can be extended to 25 years.

Eliminate PID effect. The PID effect of components seriously affects the power generation of the system and increases the burden of operation and maintenance. The DC side of the micro-inverter system has a voltage of only about 40V, which eliminates the PID effect from the source and ensures the efficient operation of the system.

Monitor the working status of each component of the photovoltaic power station system in real time worldwide, quickly locate the fault point and cause online, and achieve accurate and efficient operation and maintenance.

It can easily cope with different scenarios, different orientations, shadows, and compatibility between different components/inverters, reducing power station transformation and special inverter protection treatment; the system can be infinitely expanded without involving transformation.



Reference address:Application issues of micro inverters in BIPV scenarios

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