System connection power generator and control method thereof

Abstract

In a solar energy generator 10 including a solar battery 11, a boosting circuit 14 for boosting DC power generated by the solar battery 11, an inverter circuit 15 for converting the DC power boosted in the boosting circuit to AC power, and a microcomputer 17 for controlling at least the boosting circuit and the inverter circuit so that AC power suitably usable as the AC power of a commercial power supply system 13 can be. supplied to the commercial power supply system 13, the power to be supplied to the various kinds of equipment of the solar energy generator 10 is selectively supplied from one of the solar battery 11 and the commercial power supply system 13. The microcomputer 17 stores the operational status data of the solar energy generator 10 into an external storage device 41, and these data can be used for maintenance or trouble shooting of the solar energy generator 10. Further, an inexpensive ZCT can be used for a detecting core 44 of a current sensor of a DC earth fault detecting device 40, and thus the cost can be reduced.

Description

technical field [0001] The present invention relates to a system-connected power generation device for regenerating generated power to a commercial power supply system and a control method thereof. Background technique [0002] In recent years, not only households use electricity generated using sunlight as an energy source, but also solar power generators are popularized as system-connected power generators that regenerate surplus power not used by households to commercial power supply systems. [0003] In such a photovoltaic power generation device, after boosting the voltage of the DC power generated by the solar cell with a booster circuit, the boosted DC power is converted into AC power corresponding to the AC power of the commercial power supply system by the inverter circuit. electricity. [0004] In the above-mentioned photovoltaic power generation device, it is supplied as a booster circuit, an inverter circuit, a control device for controlling these booster circui...

AI Technical Summary

Problems solved by technology

At this time, technicians have to deal with the insufficient power generation of the photovoltaic power generation device based only on the accumulated value of the power generation amount of the remaining photovoltaic power generation device as data, and cannot take appropriate countermeasures for the insufficient power generation.

That is, there is a problem that the correct reason for the insufficient power generation of the photovoltaic power generation device is found, but it cannot be dealt with accordingly.

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