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Matrix evolution-based photovoltaic array fault location method

A photovoltaic array and fault location technology, applied in the monitoring of photovoltaic modules, photovoltaic power generation, photovoltaic systems, etc., can solve the problems of inaccurate positioning of faulty components and long positioning time.

Active Publication Date: 2015-11-04
SHIJIAZHUANG KE ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the current technical problems of inaccurate and time-consuming positioning of faulty components in photovoltaic arrays, the present invention provides a photovoltaic array fault location method based on matrix evolution, the core of which is the matrix evolution algorithm. By comparing photovoltaic panels in pairs, And use its relative value to carry out weight processing and transform it into a linear solution, and further iterate through the evaluation function and evolution function, and optimize the technical solution step by step to finally obtain the solution, realizing the rapid and accurate positioning of the failed photovoltaic panel

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Embodiment 1

[0035] In order to verify the feasibility and efficiency of the matrix evolution algorithm as the core of this method in practical applications, the particle swarm optimization algorithm is used as a comparison, and Matlab is used to simulate and compare the two algorithms. The simulation process is as follows:

[0036] (1) The data of photovoltaic panels in 5 photovoltaic arrays in practical applications were collected, and after preprocessing respectively, 5 sets of judgment matrices P were obtained as shown in the following table:

[0037]

[0038] (2) Substitute the above-mentioned judgment matrix P into the matrix evolution algorithm and the particle swarm algorithm in the present invention as input data, and the results after matlab simulation are as follows:

[0039] It can also be seen from the simulation result data that the matrix evolution algorithm of the present invention takes shorter calculation time and converges faster than the particle swarm algorithm.

...

Embodiment 2

[0042] In this embodiment, the data group 1 in Embodiment 1 is taken as an example to illustrate the specific process of the matrix evolution algorithm of the present invention. In this embodiment, the expected error k is set to 0.5.

[0043] Step (1), the data acquisition system collects the output power E, sunshine intensity F, open circuit voltage G, short circuit current H, panel temperature I, open circuit current J, commissioning time K and current time L of each photovoltaic panel in the photovoltaic array , according to the panel area A, rated conversion efficiency B, annual loss rate C and rated voltage D of each photovoltaic panel stored in the main processor,

[0044] Calculate the judgment value of each photovoltaic panel according to the following formula, rated output power X=(B*(1-C) (L-K) *A*F)*(1-(I-60)*0.0004), judgment value Y = (1+ (X-E) / X)*40% + (1+(D-G*J / H) / D)*( 1-40%), if X D then take G*J / H = D;

[0045] At this time, if Y≤50%, it is directly judged t...

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Abstract

The invention discloses a matrix evolution-based photovoltaic array fault location method and belongs to the photovoltaic array fault diagnosis technical field. According to the technical scheme of the invention, a matrix evolution algorithm is adopted a core, and photovoltaic panels are compared in pairs, and weight processing is performed on the relative values of the photovoltaic panels, so that calculation can be converted into linear solving; an evaluation function and an evolution function are utilized to perform continuous iteration, so that optimization can be realized step by step, and finally solutions can be obtained. The matrix evolution-based photovoltaic array fault location method of the invention has the advantages of fast, efficient accurate and small-error location as well as high feasibility. According to a further improved technical scheme of the invention, a calculation method of set properties and judgment values for evaluating the performance of the photovoltaic panels is provided, so that evaluation on the comprehensive performance of the photovoltaic panels is reasonable and comprehensive. An acquisition device in a photovoltaic panel data acquisition system is connected with the inverters of the plurality of groups of photovoltaic panels by means of a wireless local area network, and therefore, the structure of a system for realizing the method can be simplified, and the method can have a wide application range.

Description

technical field [0001] The invention relates to the technical field of photovoltaic array fault diagnosis, in particular to a photovoltaic array fault location method based on matrix evolution. Background technique [0002] In recent years, with the rapid development of photovoltaic power generation projects, the scale of photovoltaic power plants is also increasing. Usually, a large number of photovoltaic power generation panel components are used to form a photovoltaic array with a large number and a large distribution area. If one of the photovoltaic panel components fails, it will cost a lot It takes manpower and time to locate the fault to the component, so as to eliminate the fault in time. With the rapid development of computer technology, people began to try to use intelligent control algorithms to complete the intelligent judgment and positioning of photovoltaic system faults. However, there are hundreds of thousands of photovoltaic panels in a photovoltaic power s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S50/10G06F19/00
CPCY02E10/50
Inventor 常生强陈洪雨屈国旺陈贺袁玉宝雷恒亮赵宏杰侯志卫李春海翟志国武拴娥杜晓刚郝磊范嘉煜赵鹏安志国
Owner SHIJIAZHUANG KE ELECTRIC