Advantages and disadvantages of string inverter

The advantages of string inverter

1.Modular design, its advantage is not affected by the difference between modules, effects of shade, while reducing the best working point of photovoltaic battery and solar system inverter components do not match the situation, increase the maximum generating capacity.
2.In the rainy day, foggy area, can generate power for a long time.
3.String inverter with small volume and light weight, convenient handling and installation, do not need specialized tools and equipment, also do not need a special distribution room, can simplify the construction, reduce the area, DC line connection does not need DC bus box and DC power distribution cabinet.
4.Low power consumption, low impact of failure, convenient replacement and maintenance.
5.Multi path MPPT tracking, reduce the impact of the block and the direction, and when a fault occurs, does not affect the power generation, high reliability.

Disadvantages of string inverter

1.More electronic components, power devices and signal circuits on the same board, difficult to design and manufacture.
2.The electric power device of small gap, not suitable for high altitude area.
3.Outdoor installation, is very easy to cause the shell and heat sink aging exposed to the weather.
4.When a plurality of solar energy inverters in parallel, total harmonic is high, THDI of single inverter can control to more than 2%, but if more than 40 sets of inverter in parallel, total harmonic superposition and difficult to suppress.

评论

发表评论

此博客中的热门博文

Correct selection of backup time for UPS

图片
UPS backup time is generally a problem concerned by customer in the purchase process. Usually most people prefer to choose the  UPS  which power backup the longer the better, in fact, this is not correct. We must firstly clear that the seller will usually have standard type UPS and long-acting UPS. Standard type UPS with built-in battery, after a power interruption can supply power to the load equipment in general for a few minutes to tens of minutes, of course, the length of time depends on the load. Long acting UPS can not only meet the power requirement of load, but also meet the requirements of customers and work types and so on, so the long-term UPS is usually equipped with an external battery pack. If the client is not particularly strict to the work condition of the load, and the power of the load is not particularly large, usually with standard type UPS would be enough. Because the choice of long backup time UPS is bound to increase the number of battery groups an...
阅读全文

126th Canton Fair

图片
On Oct 15th 2019, as one of the most important trade promotion platforms for Chinese enterprises to expand the global market, Canton Fair in Guangzhou focused on highlighting innovation driven, and “independent brand” became a high-frequency word of Canton Fair. Xu Bing, a spokesman for the Canton Fair and deputy director of the China Foreign Trade Center, said that the domestic and foreign environment faced by China’s foreign trade development this year is more complex and uncertain. The majority of exhibitors accelerated quality improvement and innovation, and continued to make efforts in technology research and development, product innovation, brand cultivation, etc., with high technology, high quality, high added value and independent brand products emerging. Many independent innovative R & D products are welcomed by the market. At the same time, purchasers are less sensitive to price and pay more attention to the technology, brand, quality and service of products. In ...
阅读全文

How to maximize the efficiency of your UPS

图片
1.Use of AC voltage regulator After using  UPS power supply , there is no need to add AC voltage regulator. If it must be added, it should be added to the front level of UPS, that is, the mains power first passes through the AC voltage regulator, then through the ups, and then to the load. 2.Battery balanced charging skills At present, valve regulated lead-acid battery (VRLA) used in many ups power supply is called maintenance free battery from the beginning, which gives users a misunderstanding that it seems that this battery is durable and does not need maintenance at all. Under this kind of misleading, many users have not carried out maintenance and management since they installed the battery. When the battery in UPS power supply meets the following conditions, the battery shall be charged evenly: when the terminal voltage is lower than the specified calibration voltage due to excessive discharge. For 12 V small sealed lead-acid batteries, the discharge calibration voltage is...
阅读全文