A: inverter manufacturer MPPT photovoltaic controller cycle

At present, the series type inverter has 1 - Five MPPT circuit, and centralized power frequency inverter also has 1 - Three MPPT circuit. Distributed junction box and MPPT is integrated in the inverter. Has multiple MPPT, there is a high frequency modular centralized inverter. Each module has a MPPT. Manufacturer of inverter in detail introduce today: from the point of view to solve the problem of mismatch, the greater the MPPT, the better. From the point of view of stability and efficiency, it is better to reduce the number of MPPT, because the increase in the number of MPPT often leads to higher cost of the system, the worse the stability and more wear and tear. Therefore, it is necessary to combine the actual terrain demand to choose the appropriate solution. Theoretically, the component of inconsistency should be more than 0. There are some operation value 5%, then. Loss function: many MPPT controller algorithm and interfere with the method of observation, for example, conductivity incremental method, conductivity incremental method, etc. No matter use which kinds of algorithms, through changing dc voltage to judge, sunshine intensity and so cannot avoid the error. For example, when in fact in the best working point voltage, solar inverter will continue to try to change the voltage to determine whether it is the best working point. If the MPPT loop decrease, there will be more losses. Measuring loss: MPPT controller, inverter must measure the current and voltage. In general, the greater the current, the greater the anti-interference ability, and the smaller error. 2 MPPT circuit current is 4 MPPT circuit twice, and the error is greatly reduced.
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