A micro inverter eeprom data storage method and system
A micro-inverter and data storage technology, applied in information storage, static memory, read-only memory, etc., can solve problems such as data failure, read data error, power generation storage data failure, etc., to improve service life and ensure effect of effectiveness
Active Publication Date: 2021-11-02
HOYMILES POWER ELECTRONICS INC
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Problems solved by technology
Due to the power failure of the micro-inverter at night, the power-off time generally ranges from 8 to 12 hours. When the data retention time of the repeatedly erased area in the EEPROM drops to the power-off time, such as less than 8 hours, data failure occurs The probability will increase greatly, and the probability of failure will continue to increase with the increase in the number of erases and writes. Therefore, there will be a problem that the power generation data is verified correctly after being written, and the read data is wrong after power off and restarting, resulting in the failure of the power generation storage data.
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[0052] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings, but these embodiments do not limit the present invention, those of ordinary skill in the art make structural, method, or functional changes based on these embodiments All are included in the scope of protection of the present invention.
[0053] Such as figure 1 In the illustrated embodiment of the present invention, the present invention provides a method for storing EEPROM data of a micro-inverter, the method comprising the steps of:
[0054] S1. Allocate a storage area in the EEPROM for storing the power generation data of a photovoltaic module port, and divide the storage area into N storage units;
[0055] S2. Circularly store the power generation data of the photovoltaic module port acquired each time in the corresponding storage unit in turn, and store the storage serial number corresponding to each storage in the storage unit,...
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The invention discloses an EEPROM data storage method of a micro-inverter, which includes: dividing the storage area in the EEPROM into N storage units, sequentially storing the power generation data acquired each time in the storage units, and storing each The storage serial number corresponding to one storage is stored in the storage unit; when the micro-inverter is powered off and restarted, all the storage serial numbers are read, and if there are M consecutive valid storage serial numbers, the maximum valid storage serial number is obtained as the latest valid storage serial number Store the serial number, and the power generation data corresponding to the serial number is the last stored data; the next storage unit of the last stored storage unit is the current secondary storage unit, and the current power generation data is stored in the current secondary storage unit, and the Adding one to the valid storage sequence number stored last time to obtain the current secondary storage sequence number corresponding to the current secondary storage unit, and storing it in the current secondary storage unit. The invention ensures the validity and correctness of EEPROM data reading.
Description
technical field [0001] The invention relates to the technical field of data storage, in particular to an EEPROM data storage method and system of a micro-inverter. Background technique [0002] In the field of photovoltaic technology, micro-inverters need to obtain the power generation data of each photovoltaic module port. The processor of the micro-inverter is powered by photovoltaic panels. When the processor is powered off at night or under extremely weak light conditions, it will lose connection. Therefore, the micro-inverter needs to regularly monitor each photovoltaic module The power generation of the port is stored. In embedded control systems, EEPROM is generally used as a data storage chip, which has the characteristic that data will not be lost after power failure. Generally, the erasing and writing life of EEPROM is 1 million times, and the data will become easily lost after exceeding the erasing and writing life. In micro-inverters, some system and grid-conn...
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IPC IPC(8): G11C16/10
CPCG11C16/10
Inventor 荣强袁绍君杨波赵一
Owner HOYMILES POWER ELECTRONICS INC