Cooperative control device of distributed photovoltaic grid-connected generation system and control method thereof
A grid-connected power generation and collaborative control technology, applied in photovoltaic power generation, circuit devices, AC network circuits, etc., can solve problems such as difficulty in achieving response speed, difficulty in achieving response effect, and inability to ensure rapid data transmission, and reduce equipment costs. , the effect of high noise immunity
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[0053] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0054] The embodiment of the present invention is a 1MW distributed photovoltaic grid-connected power generation system with a total system capacity of 1MW, consisting of one centralized grid-connected inverter 102 with a rated power of 1MW and 20 MPPT combiner boxes 101 with a rated power of 50kW. The rated voltage of the DC bus 103 is 850V, and the open circuit voltage of the matching photovoltaic module is about 750V.
[0055] Such as image 3 As shown, the voltage encoding module 108 is connected between the centralized grid-connected inverter 102 and the MPPT combiner box 101, and is located on the common DC bus on the side of the centralized inverter. One end is connected to the DC bus, and the other end is respectively connected to multiple MPPTs. combiner box.
[0056] Such as Figure 5 As shown, the voltage encoding module outputs t...
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