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Method for calculating back mismatch loss of double-sided photovoltaic module

A photovoltaic module, backside technology, applied in computing, computer-aided design, instrumentation, etc., can solve problems such as system mismatch and uneven irradiation distribution, and achieve the effect of improving system power generation and optimizing design

Pending Publication Date: 2019-10-15
TRINA SOLAR CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

However, in the installation and application of bifacial modules, there are still many problems to be solved, such as how to determine the installation height and spacing of bifacial modules to optimize the power generation of bifacial modules, and the radiation on the back of bifacial modules in actual application The uneven distribution of photos leads to mismatch in the system, how to calculate the backside mismatch

Method used

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  • Method for calculating back mismatch loss of double-sided photovoltaic module
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  • Method for calculating back mismatch loss of double-sided photovoltaic module

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Embodiment 1

[0038] A method for calculating the mismatch loss on the back of a double-sided photovoltaic module, comprising the following steps:

[0039] (a) Divide the back of the double-sided module into n equal parts to form n parts, where n is an integer greater than or equal to 2, and n is determined according to the type of the installed module and the number of rows. In this embodiment, it is divided into three parts For example, n equal parts are calculated in the same way, see figure 1 with figure 2 shown;

[0040] (b) Calculate the irradiance of n parts on the back of the double-sided module respectively, according to formulas (1), (2), (3) and (4), the upper, middle and lower parts of the double-sided module are respectively taken from the back of the double-sided module Irradiation from bottom to top 1 / 3, 1 / 2, 2 / 3,

[0041] I rear (t)=I ground (t)+I sky +I beam (t = up, middle, down) (1)

[0042] Among them, t is upper, middle and lower, and I rear (t) is the backsid...

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Abstract

The invention discloses a method for calculating mismatch loss of the back surface of a double-sided photovoltaic module, which comprises the following steps: equally dividing the back surface of thedouble-sided photovoltaic module into n parts to form n parts, wherein n is an integer greater than or equal to 2; respectively calculating irradiation of n parts on the back surface of the double-sided assembly; converting the maximum irradiation of the back surface into an electrical model to calculate the power of the back surface of the double-sided assembly; and respectively converting the irradiation of the n parts of the back surface into an electrical model for power calculation, comparing the maximum power with the mismatch power at the moment, and calculating and obtaining the mismatch loss of the back surface of the double-sided assembly. According to the invention, irradiation of each part of the back surface of the double-sided photovoltaic module can be obtained; and design optimization can be carried out according to the characteristics of the back surface of the double-sided assembly, for example, for the fixedly-installed double-sided assembly, the mismatch loss causedby the non-uniform irradiation of the back surface of the double-sided assembly at different installation heights is calculated and compared, the design of a double-sided system is optimized, and thepower generation capacity of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of photovoltaics, and in particular relates to a method for calculating back mismatch loss of a double-sided photovoltaic module. Background technique [0002] With the rapid development of photovoltaic power generation, technology continues to improve, costs continue to decline, and the competition situation is becoming more and more fierce. Reducing the cost of electricity has become the goal that photovoltaic companies are constantly pursuing. Compared with ordinary modules, double-sided photovoltaic modules are favored by the market because they can generate electricity on both sides, which greatly improves the power generation efficiency of the system. However, in the installation and application of bifacial modules, there are still many problems to be solved, such as how to determine the installation height and spacing of bifacial modules to optimize the power generation of bifacial modules, and the ra...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q50/06
CPCG06Q50/06G06F2111/06G06F30/17Y04S10/50Y02E40/70
Inventor 孙凯吴军全鹏赵明
Owner TRINA SOLAR CO LTD
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