Method for operating inverter and inverter

1. A method for operating an inverter, the method comprising:

converting with the inverter DC power supplied to a DC input of the inverter into AC power supplied from an AC output of the inverter to an AC output transformer by applying set operational parameter limits which define limits for allowed operating points of the inverter, wherein the operational parameters comprise at least an AC output voltage of the inverter;

collecting, during the converting, data of operational conditions related to the inverter;

determining on the basis of the collected data whether the set operational parameter limits can be optimized with regard to one or more optimization criteria by changing a voltage tapping setting of the AC output transformer, wherein the one or more optimization criteria comprises an estimated lifetime of the inverter or a part thereof; and

in response to determining that the set operational parameter limits can be optimized, changing the voltage tapping setting of the AC output transformer and adapting one or more of the set operational parameter limits including at least limits for the AC output voltage of the inverter applied in the converting on the basis of the collected data.

2. The method of claim 1 , wherein the operational parameters further comprise at least one voltage parameter and/or at least one current parameter and/or at least one power parameter and/or at least one temperature parameter.

3. The method of claim 1 , wherein the operational conditions related to the inverter comprise at least one internal condition of the inverter and/or at least one external condition of the inverter.

4. The method of claim 1 , wherein the determining is performed at predetermined time intervals and/or in response to one or more of the operational conditions related to the inverter changing beyond predetermined limits and/or in response to receiving a command.

5. The method of claim 1 , wherein the one or more optimization criteria further comprises at least one of an efficiency of the inverter, a power of the inverter, and/or an energy output of the inverter.

6. The method of claim 1 , wherein the collecting of the data of the operational conditions related to the inverter comprises measuring the data and/or receiving the data.

7. The method of claim 1 , wherein the DC power is supplied by a DC power source comprising one or more photovoltaic panels.

8. A computer program product comprising:

a computer program code embodied on a non-transitory computer readable medium, wherein execution of the program code in a computer causes the computer to:

convert with an inverter DC power supplied to a DC input of the inverter into AC power supplied from an AC output of the inverter to an AC output transformer by applying set operational parameter limits which define limits for allowed operating points of the inverter, wherein the operational parameters comprise at least an AC output voltage of the inverter;

collect, during the converting, data of operational conditions related to the inverter;

determine on the basis of the collected data whether the set operational parameter limits can be optimized with regard to one or more optimization criteria by changing a voltage tapping setting of the AC output transformer, wherein the one or more optimization criteria comprises an estimated lifetime of the inverter or a part thereof; and

in response to determining that the set operational parameter limits can be optimized, change the voltage tapping setting of the AC output transformer and adapt one or more of the set operational parameter limits including at least limits for the AC output voltage of the inverter applied in the converting on the basis of the collected data.

9. An inverter arrangement comprising:

an inverter with a DC input and an AC output; and

control means configured to:

control the inverter to convert DC power supplied to the DC input of the inverter into AC power supplied from the AC output of the inverter to an AC output transformer by applying operational parameter limits which define limits for allowed operating points of the inverter, wherein the operational parameters comprise at least an AC output voltage of the inverter;

collect, during the converting, data of operational conditions related to the inverter;

determine on the basis of the collected data whether the set operational parameter limits can be optimized with regard to one or more optimization criteria by changing a voltage tapping setting of the AC output transformer, wherein the one or more optimization criteria comprises an estimated lifetime of the inverter or a part thereof; and

in response to determining that the set operational parameter limits can be optimized, change the voltage tapping setting of the AC output transformer and adapt one or more of the set operational parameter limits including at least limits for the AC output voltage of the inverter applied in the converting on the basis of the collected data.

10. The inverter arrangement of claim 9 , wherein the operational parameters further comprise at least one voltage parameter and/or at least one current parameter and/or at least one power parameter and/or at least one temperature parameter.

11. The inverter arrangement of claim 9 , wherein the operational conditions related to the inverter comprise at least one internal condition of the inverter and/or at least one external condition of the inverter.

12. The inverter arrangement of claim 9 , wherein the control means are configured to perform the determining at predetermined time intervals and/or in response to one or more of the operational conditions related to the inverter changing beyond predetermined limits and/or in response to receiving a command.

13. The inverter arrangement of claim 9 , wherein the one or more optimization criteria further comprises at least one of an efficiency of the inverter, a power of the inverter, and/or an energy output of the inverter.

14. The inverter arrangement of claim 9 , wherein the control means are configured to collect the data of the operational conditions related to the inverter by measuring the data and/or by receiving the data.

15. An electric system comprising:

an inverter with a DC input and an AC output;

an AC output transformer; and

control means configured to:

control the inverter to convert DC power supplied to the DC input of the inverter into AC power supplied from the AC output of the inverter to the AC output transformer by applying operational parameter limits which define limits for allowed operating points of the inverter, wherein the operational parameters comprise at least an AC output voltage of the inverter;

collect, during the converting, data of operational conditions related to the inverter;

determine on the basis of the collected data whether the set operational parameter limits can be optimized with regard to one or more optimization criteria by changing a voltage tapping setting of the AC output transformer, wherein the one or more optimization criteria comprises an estimated lifetime of the inverter or a part thereof;

in response to determining that the set operational parameter limits can be optimized, change the voltage tapping setting of the AC output transformer and adapt one or more of the set operational parameter limits including at least limits for the AC output voltage of the inverter applied in the converting on the basis of the collected data; and

a DC power source connected to the DC input of the inverter, wherein the DC power source comprises one or more photovoltaic panels.

16. An apparatus comprising:

an inverter with a DC input and an AC output;

a processor; and

a memory storing instructions that, when executed by the processor, cause the apparatus to:

convert DC power supplied to the DC input of the inverter into AC power supplied from the AC output of the inverter to an AC output transformer by applying operational parameter limits which define limits for allowed operating points of the inverter, wherein the operational parameters comprise at least an AC output voltage of the inverter;

collect, during the converting, data of operational conditions related to the inverter;

determine on the basis of the collected data whether the set operational parameter limits can be optimized with regard to one or more optimization criteria by changing a voltage tapping setting of the AC output transformer, wherein the one or more optimization criteria comprises an estimated lifetime of the inverter or a part thereof; and

in response to determining that the set operational parameter limits can be optimized, change the voltage tapping setting of the AC output transformer and adapt one or more of the set operational parameter limits including at least limits for the AC output voltage of the inverter applied in the converting on the basis of the collected data.