The 4th Leading Plan for Photovoltaic Inverters - Transmission Losses
The first three mini-compilers compare the three types of solutions: long-term reliability, long-term maintenance cost, and zero-voltage ride-through. This paper analyzes the transmission loss of the string-type and the hub-and-spoke type from a technical point of view. .
Transmission loss analysis:
Transmission loss, transmission cable cost comparison:
In summary, because the string is transmitted over long distances using AC, its transmission loss is 1.44 times that of the distributed transmission loss (the current in the cable unit mm2 is selected to be equal).
Attached:
The following table shows the comparison of the power generation capacity of a photovoltaic power station in the northern part of China for the distribution and cluster type
August 2015 - March 2016 (statistics of electricity meters)
From the above table, it can be seen that the distributed type has the same MPPT and principle as the string type, but due to the distributed 800V DC transmission, the string uses AC 480V transmission, and the line loss is smaller than the string, and its power generation Slightly higher than the string type.
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