Solar power generation apparatus and control method therefor
First Claim
1. A solar power generation apparatus comprising:
- solar battery arrays, each of which has solar battery modules;
non-isolated inverters, each of which converts direct-current power generated by one of said solar battery arrays to alternating-current power and provides the alternating-current power to a commercial power system;
an earth leakage circuit breaker arranged between said non-isolated inverters and the commercial power system and connected to outputs of said non-isolated inverters in parallel; and
a controller which controls operation of said non-isolated inverters, wherein said controller controls start-timing of the operation of at least one inverter to be different from that of another inverter.
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Abstract
A solar power generation apparatus includes solar battery arrays, each of which has solar battery modules, non-isolated inverters, each of which converts direct-current power generated by one of the solar battery arrays to alternating-current power and provides the alternating-current power to a commercial power system, an earth leakage circuit breaker arranged between the non-isolated inverters and the commercial power system and connected to outputs of the non-isolated inverters in parallel, and a controller for controlling operation of the non-isolated inverters. The controller controls start-timing of the operation of at least one inverter to be different from that of another inverter. This arrangement can prevent any undesirable operation of the earth leakage circuit breaker.
73 Citations
20 Claims
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1. A solar power generation apparatus comprising:
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solar battery arrays, each of which has solar battery modules;
non-isolated inverters, each of which converts direct-current power generated by one of said solar battery arrays to alternating-current power and provides the alternating-current power to a commercial power system;
an earth leakage circuit breaker arranged between said non-isolated inverters and the commercial power system and connected to outputs of said non-isolated inverters in parallel; and
a controller which controls operation of said non-isolated inverters, wherein said controller controls start-timing of the operation of at least one inverter to be different from that of another inverter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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- 13. A control method for a solar power generation apparatus having solar battery arrays each of which has solar battery modules, non-isolated inverters, each of which converts direct-current power generated by one of the solar battery arrays to alternating-current power and provides the alternating-current power to a commercial power system, and an earth leakage circuit breaker arranged between said non-isolated inverters and the commercial power system and connected to outputs of the non-isolated inverters in parallel, said method comprising the step of controlling start-timing of operation of at least one inverter to be different from that of another inverter.
Specification