A wiring detection method, device and photovoltaic power generation system
A photovoltaic power generation system and detection method technology, applied in the direction of electrical connection testing, etc., can solve the problems of low efficiency of manual inspection method, affecting the power generation of the system, and changing the system circuit.
Active Publication Date: 2020-08-28
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology
[0004] The crossing of the negative (or positive) wiring of two Boost circuits will lead to changes in the system circuit, which will affect the power generation of the system. The efficiency of manual investigation is too low
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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0033] The embodiment of the present invention discloses a wiring detection method, which is applied to such as figure 1 A photovoltaic power generation system with multiple inputs is shown.
[0034] The photovoltaic power generation system includes an inverter and N three-level Boost circuits, N≥2, wherein: the input sides of the N three-level Boost circuits are respectively connected to independent photovoltaic modules, and the output sides are connected in ...
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The invention discloses a wiring detection method and device and a photovoltaic power generation system. The method comprises the step: sequentially carrying out the following steps for a first three-level Boost circuit, a second three-level Boost circuit, ..., and an (N-1)-th three-level Boost circuit in the photovoltaic power generation system with multi-input: controlling the k-th three-level Boost circuit to operate (1<=k<=N-1), and enabling the remaining (N-1) three-level Boost circuits to remain off; obtaining the currents of the remaining (N-1) three-level Boost circuits; judging whether the current of one of the remaining (N-1) three-level Boost circuits exceeds a preset range or not: giving an alarm if the current of one of the remaining (N-1) three-level Boost circuits exceeds the preset range. The method achieves the automatic inspection of whether the negative electrodes (or positive electrodes) of two three-level Boost circuits in the system are in cross connection or not.
Description
technical field [0001] The invention relates to the technical field of photovoltaic power generation, and more specifically, to a connection detection method, device and photovoltaic power generation system. Background technique [0002] figure 1 A photovoltaic power generation system with multiple inputs is shown, including an inverter and N (N≥2) three-level Boost circuits, wherein: the input sides of the N three-level Boost circuits are respectively connected to independent The photovoltaic module and the output side are connected in parallel to the input side of the inverter, and the output side of the inverter is connected to the grid or load. [0003] During on-site installation, it is unavoidable that the negative (or positive) connections of two three-level Boost circuits cross. Specifically, define the i-th (i=1,2,3,...,N) three-level Boost circuit as Boosti, the photovoltaic module corresponding to Boosti as PVi, and the positive and negative poles of PVi as PVi+...
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IPC IPC(8): G01R31/67
CPCG01R31/67
Inventor 耿后来周银银文鹏申智王鹏
Owner SUNGROW POWER SUPPLY CO LTD