Solutions for power grid fluctuations and inverter failures
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This post was last edited by hesonchang214 on 2019-11-2 08:07. The inverter reports a fault during voltage fluctuations, and it will not start again; are there any good solutions? In some cases, the inverter operates without any faults.
Check whether the parameters include a self-reset function; restart is only possible after self-reset is enabled. But this is quite dangerous; restart can only be done after confirming everything is correct.
Low voltage alarm: if the fault frequency conversion self-check fails, it cannot be started. It can only be started after the fault is cleared.
During voltage fluctuations, it’s quite difficult to resolve the issue of low-voltage tripping in inverters! Generally speaking, if the power fluctuation duration is short (within 200 milliseconds), an inverter with a lower DC voltage and a dynamic buffering function can be selected. Models from the older ABB800 series, for example, have slightly better interference resistance. Generally, the automatic restart function of the inverter depends on the process conditions; otherwise, it may cause other problems. Furthermore, for particularly critical loads, solutions to counter voltage fluctuations can include using an external DC power source for the DC bus or increasing the capacitance of the DC bus.
It is possible to set the voltage drop percentage for the inverter
Such faults can only be resolved manually on-site; attempting to restart the device through automatic forced reset may cause other problems. It is not recommended to adjust the percentage values mentioned by others, as this could lead to damage to the inverter. There is also the suggestion from other netizens to incorporate DC support technology into inverters; such technology enables the inverter to continue operating even when there are voltage fluctuations, without altering the control logic. I hope this helps!