How to select the inverter for thin film components

Guangdong bao wei new energy co., LTD not only provide customers with professional design, turnkey photovoltaic power station construction service for the total package side, with the professional knowledge and rich experience, bao wei for a component with inverter selection can give constructive Suggestions.

Due to the high fill factor crystalline silicon components, inverter is easy to find peaks, but the amorphous silicon thin-film batteries components fill factor is lower, the IV curve is flat, modified sine wave inverter need to reset the MPPT tracking step voltage peak point can be found.

Amorphous silicon thin film cells need negative ground at the same time, in order to discharge static electricity, prevent of common-mode voltage than the system voltage and inhibition of photovoltaic phalanx panels of distributed capacitance on the inverter control circuit of the common mode interference. So you have to use internal or external transformer isolation (including the step-up transformer) inverter grid, the grounding line and dc leakage protector in order to protect the personal safety.

Based on negative ground can use the above reasons, the following measures: component anode grounding, grounding is not but in case of static electricity is given priority to, so you can use indirect grounding method, indirect grounding high resistance values, to avoid the direct grounding caused with transformer isolation type inverter incompatible problem.

By practical current of the grounding resistance is very small, not so no transformer isolation type dc to ac power inverter dc leakage alarm, at the same time, the dc leakage protector on the grounding line set up small values can have personnel safety protection. Indirect grounding is the only deficiency in curbing panels distributed capacitance common-mode interference of inverter is reduced, and the problem can be diminished by distributed capacitance (e.g., using no border components) and improve the anti-interference ability inside the inverter circuit to solve, and at present most of the inverter can be suitable.