Solar Inverter and Photovoltaic Installation Comprising Several Solar Inverters
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Abstract
In one aspect, a solar inverter which can be connected to at least one photovoltaic generator at the input end and to a power system at the output end is provided. The solar inverter includes an inverter module, an electronic control unit at least for diagnosing an inverter module, and a bus interface for technically connecting the electronic control unit to a communication bus. The electronic control unit cyclically outputs a piece of status information of the solar inverter on the communication bus, and outputs an error message on the communication bus, cyclically reads status information of other solar inverters that are connected to the communication bus, and outputs an error message on the communication bus in case at least one expected additional piece of status information fails to be output. Whereby, the need for a separate monitoring unit is eliminated.
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Citations
32 Claims
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1-13. -13. (canceled)
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14. A solar inverter effective that connects to a photovoltaic generator at the input end and connects to a power system at the output end, the solar inverter comprising:
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an inverter module;
an electronic control unit effective to perform diagnostics on the inverter module; and
a bus interface effective to establish a data processing connection between the electronic control unit and a communication bus, wherein the electronic control unit is effective to;
cyclically output a first status of the solar inverter on the communication bus, cyclically read a second status of a second solar inverter connected to the communication bus, and output an error message on the communication bus in the case of the absence of the second status. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A photovoltaic installation for effecting a feed into a power system, comprising:
a solar inverter effective to connect to a photovoltaic generator, the solar inverter comprising;
an inverter module, an electronic control unit effective for carrying out diagnostics on the inverter module, and a bus interface effective for establishing a data processing connection between the electronic control unit and a communication bus, wherein the electronic control unit is effective to;
cyclically output a first status of the solar inverter on the communication bus, cyclically read a second status of a second solar inverter connected to the communication bus, and output an error message on the communication bus in the case of the absence of the second status. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A photovoltaic installation for effecting a feed into a power system, comprising:
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a first solar inverter effective to connect to a photovoltaic generator, the solar inverter comprising;
an inverter module, an electronic control unit effective for carrying out diagnostics on the inverter module, and a bus interface effective for establishing a data processing connection between the electronic control unit and a communication bus, wherein the electronic control unit is effective to cyclically output a status of the first solar inverter on the communication bus; and
a second solar inverter effective to connect to a photovoltaic generator, the solar inverter comprising;
an inverter module, an electronic control unit effective for carrying out diagnostics on the inverter module, and a bus interface effective for establishing a data processing connection between the electronic control unit and a communication bus, wherein the electronic control unit is effective to cyclically output a status of the second solar inverter on the communication bus, wherein the electronic control unit of the first solar inverter is effective to;
cyclically read the status of the second solar inverter, and output an error message on the communication bus in the case of the absence of the status of the second solar inverter, and wherein the electronic control unit of the second solar invert is effective to;
cyclically read the status of the first solar inverter, and output an error message on the communication bus in the case of the absence of the status of the first solar inverter. - View Dependent Claims (32)
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Specification