Unlock instant, AI-driven research and patent intelligence for your innovation.

Lightning protection method for solar cell panel

A technology for solar panels and lightning protection, which is applied to emergency protection circuit devices, circuits, photovoltaic power generation, etc. for limiting overcurrent/overvoltage, and can solve the problem of ground grid potential rise, solar panel shielding, and easy induction. Lightning surge and other problems, to achieve the effect of filling lightning protection

Inactive Publication Date: 2010-11-10
GUANGXI DIKAI SCI & TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there is a lightning strike nearby, the PN junction on the solar panel will generate a lightning surge under the action of the lightning electromagnetic pulse electromagnetic field. Since the voltage of the PN junction is very low, it is very easy to be broken down and damaged by the induced lightning surge.
[0007] At present, the solar panels in the solar power supply system are installed on the roof of the building or in the open field, so the solar panels are vulnerable to direct lightning strikes
The shielding strike of a direct lightning strike generally hits the metal frame of the solar panel, generating lightning electromagnetic pulses and damaging the solar panel
[0008] 3. Ground potential counterattack
[0009] When the lightning hits the lightning rod of the solar power supply system, it will cause the potential of the ground grid to rise. At the same time, because the potential on the collection line powered by the solar power is relatively low, the ground will counter-discharge the collection line, resulting in damage to the solar panel.
[0010] 4. There is an induced lightning surge in the solar panel collection line
[0011] Since the collection line of the solar power supply system is generally long, it is prone to induced lightning surges
When there is a lightning surge on the collection line, the solar panel is not protected by a lightning arrester, so it is prone to damage

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lightning protection method for solar cell panel
  • Lightning protection method for solar cell panel
  • Lightning protection method for solar cell panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The principle of the test is as Figure 4 Shown, the solar panel 16 used for the test. Under the full load of the test board, the 1.2 million volt voltage impact equipment is used to simulate the induced lightning surge test of the PN junction in the solar panel. The discharge needle 17 and the lightning rod 18 (lightning rod) are separated by 1m, the height of the lightning rod 18 is 1.2m, the solar cell panel 16 is parallel to the ground, the distance between the solar cell panel 16 and the ground is 1m, and the metal outer frame of the solar cell panel 16 and The distance between the lightning receptors 18 is 100mm, and the solar panel 16, the metal casing of the load 19 and the lightning receptors 18 are all grounded. Number of tests: 1 time, test phenomenon: the test impulse voltage is 490,000 volts, simulating a direct lightning strike from the discharge needle, hitting the lightning receptor and then leaking into the ground. Test result: The solar panel 16 was ...

Embodiment 2

[0037] The principle of the test is as Figure 5As shown, a solar panel 20 was used for the test. Under the condition of the full load of the test board, the 1.2 million volt voltage impact equipment is used to simulate the direct lightning strike test. The distance between the discharge needle 21 and the corner of the metal frame of the solar battery panel 20 is 1 m, and the metal outer frame of the solar battery panel 20 and the metal shell of the load 22 are both grounded. Number of tests: 1 time. Test phenomenon: The average impulse voltage of the test is 500,000 volts. When the solar panel is surrounded by a simulated direct lightning strike, the simulated direct lightning strike directly hits the metal frame and then leaks into the ground. Test result: The solar panel 20 was damaged.

Embodiment 3

[0039] The principle of the test is as Figure 6 Shown, the solar panel 23 used for the test. Under the full load condition of the test board, the 8 / 20uS current impact device 24 is used to simulate the ground potential counterattack and the lightning surge test on the collection line. The positive wire 25 of the solar battery panel 23 is connected to the impact wire 26 of the 8 / 20uS current impact device, and the metal outer frames of the solar battery panel 23 are all grounded. Number of tests: 1 impact on the positive wire 25 , including 11 impacts at 2kA (8 / 20uS). Test phenomenon: The surface of the solar panel 23 sparks. Test result: The solar panel 23 was damaged.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a lightning protection method for a solar cell panel, which aims to solve the problems that the conventional solar cell panel is easy to damage by lightning. The two ports of the solar cell panel have the lightning protection function and consist of a lightning surge bleeding module, high-frequency suppressing modules, a transient state suppressing voltage-stabilizing module, a clamping voltage-stabilizing module and a backflow protecting module, which can be classified into two kinds of structures. The lightning surge bleeding module with large throughput carries out bleeding and equipotential on lightning surge, and the high-frequency suppressing modules, the transient state suppressing voltage-stabilizing module and the clamping voltage-stabilizing module effectively protect the solar cell panel to stabilize and clamp circuits under the impact of the lightning surge so as to ensure normal work of the solar cell panel.

Description

technical field [0001] The invention relates to a lightning protection method, in particular to a lightning protection method for a solar cell panel. Background technique [0002] Energy is the most important material basis for the development of the national economy and the improvement of people's living standards. At present, the world's energy supply mainly relies on petrochemical energy such as oil, natural gas, and coal. However, the resources of petrochemical energy are limited, and the development and use of petrochemical energy will also cause environmental pollution, which seriously restricts the sustainable development of society and economy. The development and utilization of renewable energy is an important way and measure to solve the world's energy and environmental problems. Solar energy is the most abundant renewable energy resource. In the current situation of increasing shortage of petrochemical energy and soaring prices in the world, many countries have a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02H9/04H01L31/042H02S40/30
CPCY02E10/50
Inventor 王东生余骞黄雄波
Owner GUANGXI DIKAI SCI & TECH