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Signal surge protector manufacturers talk about ways of lightning intrusion into photovoltaic power generation system and photovoltaic lightning protection measures

Release time:

2022-04-14

Since the main components of the solar photovoltaic power generation system are outdoors, it is easy to induce lightning or be induced by high-voltage surges, causing equipment damage. The small series of signal surge protector manufacturers will take everyone to discuss photovoltaic lightning protection from the ways and solutions of lightning surge intrusion.

Signal surge protector manufacturers talk about ways of lightning intrusion into photovoltaic power generation system and photovoltaic lightning protection measures

Signal Surge Protector Manufacturers: Ways of Lightning Intrusion into Photovoltaic Power Generation System and Photovoltaic Lightning Protection Measures

Signal Surge Protector Manufacturers: Ways to 1. Lightning Impulse Intrusion into Photovoltaic Power Generation System

(1) The ground potential counterattack voltage invades through the grounding body. When the lightning strikes the lightning rod, the radial potential distribution will be generated near the grounding body of the lightning rod. The ground potential of the grounding body of the electronic equipment close to it will be counterattacked, and the invasion voltage can reach tens of thousands of volts.

(2) Solar cell array DC input line intrusion, this intrusion can be divided into the following two situations.

(1) When the solar cell array is struck by direct lightning, the strong lightning voltage will penetrate the cable sheath of the adjacent soil or DC input line, causing the lightning pulse to invade the photovoltaic system.

When the charged cloud discharges to the ground, the entire photovoltaic array induces an overvoltage of several thousand volts like a huge countless loop antenna, which is introduced through the DC input line and causes damage to the photovoltaic system equipment connected to the line.

(3) Photovoltaic system output power supply line invasion, when the power supply equipment and power supply lines are struck by lightning, the lightning overvoltage on the power line can reach tens of thousands of volts on average, and the output line is also the main factor to introduce far-sensing lightning. Lightning pulses invade photovoltaic microelectronic equipment and systems along the power line, which can cause a devastating blow to the system equipment.

Signal Surge Protector Manufacturer: Lightning Protection Measures and Design Requirements for 2. Solar Photovoltaic Power Generation System

(1) In places and occasions prone to lightning strikes, try to avoid choosing the construction address of solar photovoltaic power generation systems or power stations.

(2) Try to avoid the projection of the lightning rod falling on the solar cell array module.

(3) According to the on-site conditions, different protection measures such as lightning rod, lightning protection belt and lightning protection network can be adopted to protect direct lightning and reduce the probability of lightning strike. As far as possible, several evenly arranged down leads can be adopted to introduce lightning strike current into the ground. The shunt effect of multiple down leads can reduce the lead voltage drop of down leads, reduce the risk of side strikes and reduce the magnetic field intensity generated by down lead discharge.

(4) In order to prevent lightning induction, all metal objects of the entire photovoltaic power generation system, including the battery module frame, equipment, chassis/cabinet shell, metal conduit, etc., should be equipotential connected with the combined grounding body, and independently grounded, the equipotential connection of the photovoltaic system.

(5) Install lightning protection devices step by step on the system circuit, implement multi-level protection, and discharge lightning or switching surge current through multi-level lightning protection devices. The DC line part of the photovoltaic power generation system generally uses DC power arresters. The AC line part of the inverter uses AC power arresters, and the application of lightning arresters in solar photovoltaic power generation systems.

The above is a small series of signal surge protector manufacturers to explain the ways of lightning intrusion into photovoltaic power generation system and photovoltaic lightning protection measures, hoping to be helpful to everyone.

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