Physical address determining method, apparatus, and device, and storage medium

An apparatus for a photovoltaic power generation system having a master node and a plurality of photovoltaic strings, the apparatus comprising:

• a non-transitory computer readable storage medium having instructions stored therein, which when executed by a processor, cause the apparatus to:
• control at least two slave nodes in the photovoltaic power generation system to sequentially start up, wherein an output end of each photovoltaic string is connected to an input end of the master node;
• each photovoltaic string comprises at least one photovoltaic power generation group;
• each photovoltaic power generation group comprises one photovoltaic module and one slave node;
• when any photovoltaic string comprises at least two photovoltaic power generation groups, the at least two photovoltaic power generation groups are connected in series;
• detect a change status of an input voltage of the master node when the at least two slave nodes are controlled to sequentially start up;
• based on the detected change status, group two slave nodes for which a superposition phenomenon occurs on the input voltage during sequential startup and corresponding photovoltaic modules into a same photovoltaic string, and group two slave nodes for which no superposition phenomenon occurs on the input voltage during sequential startup and corresponding photovoltaic modules into different photovoltaic strings, to obtain the plurality of photovoltaic strings, wherein the superposition phenomenon is a phenomenon that an amplitude increment in the input voltage is within a preset neighborhood range of unit amplitude, the unit amplitude is amplitude of the input voltage of the master node when only one slave node starts up, and the preset neighborhood range is a numerical range centered on the unit amplitude;
• and
• when a first slave node quantity of a first photovoltaic string is different from other slave node quantities of other photovoltaic strings, determine, from the plurality of photovoltaic strings obtained through grouping, a physical address of a photovoltaic string whose slave node quantity is equal to the first slave node quantity, as a physical address corresponding to the first slave node quantity.

A physical address determining device, coupled to a photovoltaic power generation system having a master node and a plurality of photovoltaic strings, the physical address determining device comprising:

• a processor and a memory for storing at least one instruction, which when loaded and executed by the processor, causes the processor to perform operations, the operations comprising:
• controlling at least two slave nodes in the photovoltaic power generation system to sequentially start up, and detecting a change status of an input voltage of the master node, wherein an output end of each photovoltaic string is connected to an input end of the master node, each photovoltaic string comprises at least one photovoltaic power generation group, each photovoltaic power generation group comprises one photovoltaic module and one slave node, when any photovoltaic string comprises at least two photovoltaic power generation groups, the at least two photovoltaic power generation groups are connected in series;
• based on the detected change status, grouping two slave nodes for which a superposition phenomenon occurs on the input voltage during sequential startup and corresponding photovoltaic modules into a same photovoltaic string, and grouping two slave nodes for which no superposition phenomenon occurs on the input voltage during sequential startup and corresponding photovoltaic modules into different photovoltaic strings, to obtain the plurality of photovoltaic strings, wherein the superposition phenomenon comprises a phenomenon that an amplitude increment in the input voltage is within a preset neighborhood range of unit amplitude, the unit amplitude is amplitude of the input voltage of the master node when only one slave node starts up, and the preset neighborhood range is a numerical range centered on the unit amplitude;
• and
• when a first slave node quantity of a first photovoltaic string is different from other slave node quantities of other photovoltaic strings, determining, from the plurality of photovoltaic strings obtained through grouping, a physical address of a photovoltaic string whose slave node quantity is equal to the first slave node quantity, as a physical address corresponding to the first slave node quantity.

A non-transitory computer readable storage medium, wherein the non-transitory computer readable storage medium stores at least one instruction, which when loaded and executed by a processor, causes the processor to perform operations, the operations comprising:

• controlling at least two slave nodes in a photovoltaic power generation system to sequentially start up, and detecting a change status of an input voltage of a master node of the photovoltaic power generation system, wherein the photovoltaic power generation system comprises a plurality of photovoltaic strings, an output end of each photovoltaic string is connected to an input end of the master node, each photovoltaic string comprises at least one photovoltaic power generation group, each photovoltaic power generation group comprises one photovoltaic module and one slave node, when any photovoltaic string comprises at least two photovoltaic power generation groups, the at least two photovoltaic power generation groups are connected in series;
• based on the detected change status, grouping two slave nodes for which a superposition phenomenon occurs on the input voltage during sequential startup and corresponding photovoltaic modules into a same photovoltaic string, and grouping two slave nodes for which no superposition phenomenon occurs on the input voltage during sequential startup and corresponding photovoltaic modules into different photovoltaic strings, to obtain the plurality of photovoltaic strings, wherein the superposition phenomenon comprises a phenomenon that an amplitude increment in the input voltage is within a preset neighborhood range of unit amplitude, the unit amplitude is amplitude of the input voltage of the master node when only one slave node starts up, and the preset neighborhood range is a numerical range centered on the unit amplitude;
• and
• when a first slave node quantity of a first photovoltaic string is different from other slave node quantities of other photovoltaic strings, determining, from the plurality of photovoltaic strings obtained through grouping, a physical address of a photovoltaic string whose slave node quantity is equal to the first slave node quantity, as a physical address corresponding to the first slave node quantity.