Huawei photovoltaic inverters rank among the top ten in the list of photovoltaic inverters, so do you know what technologies and strengths Huawei photovoltaic inverters have? What are the categories? This article first introduces the classification of Huawei photovoltaic inverters, and then takes stock of 16 black technologies about Huawei photovoltaic inverters. Follow the author to learn more about them.
Photo of Huawei photovoltaic inverter
Classification of Huawei PV(photovoltaic) Inverters
1. Centralized inverter
The centralized inverter technology is that if thousands of parallel photovoltaic strings are connected to the DC input terminal of the same centralized inverter, generally a three-phase IGBT power module is used for a large power module, and a field effect transistor is used for a small power module. DSP conversion controller to improve the quality of the generated power, making it very close to the sinusoidal current, generally used in large-scale photovoltaic power station (> 10kW) system. The biggest feature is the high power and low cost of the system, but because the output voltage and current of different photovoltaic strings are often not completely matched (especially when the photovoltaic strings are partially blocked due to cloudy, tree shade, stains, etc.), centralized inverter The way of changing will lead to the reduction of the efficiency of the inverter process and the decline of the power consumption. At the same time, the power generation reliability of the entire photovoltaic system is affected by the poor working status of a certain photovoltaic unit group. A recent research direction is the use of space vector modulation control and the development of new topological connections of inverters to obtain high efficiency at part loads.
2. String inverter
The string inverter is based on the concept of modularization. Each photovoltaic string (1-5kw) passes through an inverter, which has the maximum power peak tracking at the DC end and parallel connection with the grid at the AC end. It has become an international The most popular inverter on the market.
Many large PV plants use string inverters. The advantage is that it is not affected by module differences and shading between strings, and at the same time reduces the mismatch between the best operating point of the photovoltaic module and the inverter, thereby increasing the power generation. These technical advantages not only reduce the system cost, but also increase the reliability of the system. At the same time, the concept of "master-slave" is introduced between the strings, so that the system can connect several groups of photovoltaic strings together and let one or several of them work when the power of a single string cannot make a single inverter work. , so as to produce more electricity. The latest concept is that several inverters form a "team" to replace the concept of "master-slave", which makes the reliability of the system a step further. At present, transformerless string inverters have taken the dominant position.
3. Micro inverter
In a traditional PV system, about 10 photovoltaic panels are connected in series to the DC input end of each string inverter. When one of the 10 battery panels connected in series fails to work well, the string will be affected. If the same MPPT is used for multiple inputs of the inverter, each input will also be affected, greatly reducing power generation efficiency. In practical applications, various blocking factors such as clouds, trees, chimneys, animals, dust, ice and snow will cause the above factors, and the situation is very common. In the micro-inverter PV system, each panel is connected to a micro-inverter, and when one of the panels fails to work well, only this panel will be affected. The other photovoltaic panels will all be running at their best, making the overall system more efficient and producing more electricity. In practical applications, if the string inverter fails, it will cause several kilowatts of battery panels to fail to function, while the impact caused by the failure of the micro-inverter is quite small.
4. Power optimizer
The installation of a power optimizer (OptimizEr) in a solar power generation system can greatly improve the conversion efficiency, and simplify the functions of the inverter (Inverter) to reduce costs. In order to realize a smart solar power generation system, the device power optimizer can indeed make each solar cell play the best performance, and monitor the battery consumption status at any time. The power optimizer is a device between the power generation system and the inverter, and its main task is to replace the original optimal power point tracking function of the inverter. By simplifying the circuit and a single solar cell corresponds to a power optimizer, the power optimizer performs an extremely fast best power point tracking scan in an analog way, so that each solar cell can indeed achieve the best power point tracking , In addition, the battery status can be monitored anytime and anywhere by using a communication chip, and the problem can be reported immediately so that relevant personnel can repair it as soon as possible.
Huawei photovoltaic inverter technology and strengths
1. The largest unattended logistics center in Asia, except for a few links, most of them have realized the concept of industrial Internet of Things abroad. Possesses three leading technologies in industrial production: automation technology, bar code technology, wireless radio frequency RF equipment to realize paperless management.
2. The overall data collection accuracy of China's photovoltaic power plants is about 3%, and this figure is 0.5% for Huawei.
3. Remove the vulnerable parts, remove the container or the inverter house, and integrate them all into the inverter, as well as the smart photovoltaic terminal with a protection level of up to IP67, not limited to the highest industry standard, and can be half-immersed in 1 meter deep water It was safe and sound for an hour, and it was transferred to the harsh application environment where the photovoltaic power station is located.
4. The most stringent quality certification test in the industry. Its own 10-meter microwave anechoic chamber electromagnetic compatibility test, accelerated life aging test, harsh comprehensive pressure test integrating dust, temperature, humidity, and altitude, shocking rocket-induced lightning test, and the only anti-15 typhoon test, The inverter is considered qualified only if it does not get water in the typhoon, so it is also naturally dust-proof.
5. Lean production, 6Sigma quality level, every screw is inspected by machine and checked by two people, and there has never been an error in a barcode link for eight years.
6. Directly send orders to be issued to company leaders, paperless office, and evaluate the response time and work completion of the operation and maintenance team. The operation and maintenance team will no longer fall into the dilemma of "no problem, the boss feels that there is no work".
7. The FusionSolar system can directly output the power generation of all power plants under a company. By comparing the estimated power generation, you can see the impact of components, weather, and operation and maintenance on the power plant. The concept of "operation" has been added to the management system, so that Investors should better analyze whether this company that is an independent power provider (IPP) is "reliable".
8. PLC technology and 4GLTE wireless technology replace the traditional RS485 and optical fiber. A small box can cover a range of ten kilometers without digging buried trenches. It can be called the mobile Internet in the power station. This alone saves 2 cents per watt.
9. "0-Touch" operation and maintenance to achieve real "manpower liberation".
10. Industry-leading cloud service hardware and operating platform, and high-performance blade servers make cloud center management, big data storage, mining and analysis more reliable, stable and fast.
11. Huawei's KPI analysis system with power station PR as the core realizes the quantitative evaluation of people, events (alarm handling, ticket processing, etc.), and equipment; through 5 points and 4 sections, the loss analysis is carried out layer by layer to find the power station Components and abnormal links of wear and tear, actively analyze and improve power generation.
12. Adopting a unique heat dissipation concept, coupled with uniform heat design technology, thermal isolation, thermal shielding technology, etc., to achieve no external fan. From the long-term stable application of the heavy sand and dust in the northwest plateau and the strong corrosion environment of Hainan seaside, the service life of the device is guaranteed, and the overall reliability and protection effect are better.
13. In the recent appraisal of China's efficiency by Jianheng, the SUN2000-40KTL model stands out from the crowd, winning the crown of inverters with a "Chinese efficiency" of 98.41%.
14. The factory is inspected by retired experts from Toyota every month. At present, the entire factory is highly automated and standardized. The most impressive thing is the automatic delivery robot that looks like the cleaning robot M-O in "Robot Story", which automatically distributes raw materials in the workshop according to the magnetic induction line, which makes people feel cute. However, the loud and clear "Dream of Water Town" used to remind employees to pay attention exposed the real age of the engineers.
15. The most powerful global procurement channel, Huawei's component procurement costs are the lowest in the world.
16. While other companies are still studying how to sell their products, Huawei is already using big data to study how to increase customer loyalty. After Huawei proposes a fully connected world, photovoltaic inverters, after-sales services, and even maintenance centers and big data will become the most valuable intangible assets of power stations in the future.