Power generation unit and photovoltaic power station
A technology of power generation units and photovoltaic cells, which is applied in photovoltaic power stations, photovoltaic power generation, photovoltaic modules, etc., can solve the problem that the power generation efficiency needs to be improved, and achieve the effect of reducing the influence range and improving the power generation efficiency.
Inactive Publication Date: 2015-01-28
SUZHOU TALESUN SOLAR TECH CO LTD
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But, the power generation efficiency of above-mentioned power generation unit remains to be improved
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[0032] As mentioned in the background art section, the power generation efficiency of the power generation unit in the prior art needs to be improved.
[0033] The inventor found that according to the design specifications of photovoltaic power plants, the distance between the front and rear photovoltaic arrays in each power generation unit can only ensure that the light is not blocked from 9:00 am to 3:00 pm on the winter solstice day (that is, the upper row of photovoltaic modules and the lower row of photovoltaic modules are not blocked. light), except for this time period, the photovoltaic modules in the lower row will block light. And each centralized inverter has only 3 MPPTs (Maximum Power Point Tracking, maximum power point tracking), that is, each power generation unit in the prior art includes 6 MPPTs to track the power of 102 photovoltaic sub-arrays, Moreover, in the prior art, when the six MPPTs are connected between the photovoltaic sub-arrays and the centralized ...
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The embodiment of the invention discloses a power generation unit which comprises a photovoltaic power generation array and an inverter device. A plurality of photovoltaic subarrays at least comprise two rows of photovoltaic subarrays, and each row of photovoltaic subarrays comprises a first row of photovoltaic modules and a second row of photovoltaic modules. The inverter device comprises serial string type inverters which are in one-to-one correspondence with all the rows of photovoltaic modules and are electrically connected with all the rows of photovoltaic modules. Accordingly, in the power generation unit, the photovoltaic modules in different rows are provided with the corresponding serial string type inverters. Therefore, the power generation unit can conduct different MPPT tracking on the photovoltaic modules in different rows, and the light blocking phenomenon happening to the photovoltaic modules in one certain row in all the rows of photovoltaic subarrays can be avoided. The problem that the electric quantity of the entire power generation unit is affected by shadows is solved, and the power generation efficiency of the power generation unit is improved.
Description
technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a power generation unit and a photovoltaic power station. Background technique [0002] Due to the clean and pollution-free advantages of solar power generation, the installed capacity of domestic photovoltaic power plants has grown rapidly year by year in recent years. At present, photovoltaic power stations can be divided into large-scale photovoltaic power stations on the ground and distributed photovoltaic power stations on the roof. Among them, the ground photovoltaic power station covers a large area and has a large installed capacity. It generally adopts a technical solution of decentralized power generation, centralized control, and single-point grid connection. Usually, a large-scale photovoltaic power station on the ground is composed of several power generation units, and the installed capacity of each power generation unit is about 1MW. [0003...
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IPC IPC(8): H02S40/32H02S10/00
CPCH01L31/042H02S10/00H02S40/00Y02E10/50
Inventor 周建朋李定孙利国焦同彬代大海高启峰冯立强樊俊伟霍耀明
Owner SUZHOU TALESUN SOLAR TECH CO LTD