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Photovoltaic array state determination method

A photovoltaic array, state judgment technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inaccurate evaluation

Inactive Publication Date: 2015-12-16
XUJI GRP +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for judging the state of a photovoltaic array, which is used to solve the problem that in the prior art, when evaluating a photovoltaic array, only focus on quantitative indicators such as the output power, current, and voltage of the entire photovoltaic power plant, and do not focus on external factors problems caused by inaccurate assessment

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Embodiment Construction

[0079] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0080] Such as figure 1 As shown, the method for judging the state of the photovoltaic array of the present invention first needs to deeply analyze the working state of the photovoltaic array, the load state, and the characteristic parameters that affect its state, and then establish a parameter model based on the vertical and horizontal dimensions, and then use the analogy method to equivalent the photovoltaic array to Photovoltaic modules, build a photovoltaic array group analogy assessment model, and realize the status assessment of photovoltaic arrays under real-time monitoring. The specific analysis is as follows:

[0081] First of all, when evaluating an object in an all-round way, we must focus on all the influencing factors, so we analyze the characteristic parameters that affect the state of the photovoltaic array in combination with the actual oper...

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Abstract

The present invention relates to a photovoltaic array state determination method. The method comprises: collecting feature parameters that affect each photovoltaic array state; introducing a time sequence node and a photovoltaic array monitoring point, and establishing a parametric value model from latitudinal and longitudinal dimensions; constructing a photovoltaic array running state assessment model based on a positive and negative ideal point assessment scheme; and establishing a time function relationship between a state assessment result set and each longitudinal and latitudinal parametric value by using a Gaussian curve fitting method, and in combination with an array I-V curve and an irradiance-temperature curve, accurately assessing a current photovoltaic array state from longitudinal and latitudinal angles, analyzing an abnormality cause, and proposing an operation and maintenance measure. By performing state assessment according to a plurality aspects of feature parameters, accuracy of state assessment can be improved, real-time operation and maintenance of a photovoltaic array is facilitated, and the method lays a good foundation for improving power generation efficiency of a photovoltaic array group and searching for a better MPPT algorithm and has high application value.

Description

technical field [0001] The invention relates to a method for judging the state of a photovoltaic array, and belongs to the technical field of photovoltaic array safe operation. Background technique [0002] With the increasingly widespread application of photovoltaic power generation technology, a large number of photovoltaic systems have been put into operation. There are more researches on photovoltaic system monitoring systems at home and abroad, but less research on the operation and maintenance of photovoltaic power plants. Photovoltaic array is an overall module composed of multiple photovoltaic modules connected in series or in parallel in order to achieve a certain DC power output. As an important part of the photovoltaic power generation system, the quality of the components and the status of the photovoltaic array directly affect the performance of the entire photovoltaic power generation system. Power generation efficiency and service life. Therefore, it is very ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCY02E60/00
Inventor 龚晓伟王景丹唐云龙霍富强焦照旭刘桂莲王留送万要军雷婷
Owner XUJI GRP
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