暴雨天气，光伏电站防护和人身安全怎么做？

发现有人触电倒地，千万不要赤手救人，必须先切断电源，用干燥的绝缘器具挑开电线，才能对触电者进行抢救或拨打120进行现场救援。

In summer, rainstorms are frequent. The main impact on the photovoltaic power station is that a large amount of rainwater soaks the cables and components, and the insulation performance is degraded or even damaged. As a result, the inverter fails to generate power due to fault detection.



The inclined roof has strong drainage capacity, and generally there will be no excessive ponding; If the lower edge of flat roof components is low, it may be soaked by rainwater; For photovoltaic power plants installed on the ground, rainwater washing the ground may cause component imbalance.





Flooded photovoltaic power station



What should photovoltaic power plants do in the face of inevitable natural disasters?



Careful site selection



In comprehensive consideration of the site selection requirements for photovoltaic power generation, the short-term maximum precipitation, ponding depth, flood water level, drainage conditions, etc. should be considered in many ways in terms of hydrological conditions. The above factors will directly affect the design of photovoltaic system support system, support foundation and installation height of electrical equipment. If the ponding depth is high, the installation height of components and other electrical equipment will be high, and the flood level will affect the safety of support foundation and electrical. Poor drainage conditions will lead to long-term flooding of the foundation and metal support and endanger the safety of the power station.



Adequate design



In the scheme design stage, in addition to the consideration of cost control, according to the hydrological data, for the ground power station and the fish light complementary power station, the designed support height should have relative allowance. For the lake photovoltaic power station, it is recommended to adopt the floating design scheme. The drainage system shall be designed according to the terrain. The surface power station, the fishery light complementary power station and the surface power station shall be designed and equipped with corresponding drainage facilities according to the local meteorological and hydrological conditions.



Flood and waterlogging response



Put prevention first, pay attention to the weather conditions in time, and add temporary drainage facilities before heavy precipitation. Management and patrol inspection: during the process of heavy rainfall, special means of flood control dams shall be taken for special terrain areas. When the photovoltaic power generation system is flooded, there may be electric shock when it is close to or in contact with the photovoltaic inverter (PCS) and the connection between the solar panel and the power supply cable. The solar panel damaged by flood may have poor insulation and other faults, and there is a danger of electric shock when it is in contact. In the process of resuming operation, avoid manual operation and take anti electric shock measures (use rubber gloves and rubber boots, etc.) to reduce the risk of electric shock.



Equipment Selection



Priority shall be given to equipment with high protection level, such as micro inverter with excellent waterproof performance and protection level of IP67; It is a support that can be immersed in water for a long time, can not rust for more than ten years or even decades, does not reduce its rigidity, and maintains structural stability. The equipment manufacturer and technical team shall upgrade the equipment and technology to avoid or reduce the loss of PV power station after flood.



Select appropriate PV insurance



Cover the direct property loss of photovoltaic power station caused by natural disasters, accidents, etc. It mainly protects: photovoltaic power generation equipment, power transmission and transformation system, buildings and other ancillary facilities; Insurance liabilities mainly include natural disasters, non mechanical or electrical accidents and mechanical or electrical accidents.



Specific measures for preventing rainstorm of photovoltaic power station



1. Comprehensively inspect the installed PV modules and projects under construction, including the adjustment of screw fasteners and fasteners, and replace the damaged fasteners immediately. Bind and fix the tandem components on the windward side with double strands of 2 mm2 iron wire.



2. Install a fastening wind proof pull rod on the PV support to prevent the support from twisting with the wind; Tamp the ground anchors drilled through the rock on both sides of the string; Fasten all bolts in the field;



3. Strengthen the patrol inspection of components and supports. Once any loose components and supports are found, they shall be fixed in time.



4. If the load of the color steel tile roof does not meet the load-bearing requirements, it must be reinforced according to the correct scheme.



Note: during patrol inspection and operation and maintenance in rainy days, it is necessary to avoid electrical operation with bare hands. Do not directly touch the inverter, components, cables and terminals with your hands. It is necessary to wear rubber gloves and rubber boots to reduce the risk of electric shock.



What should we do for our own safety?



Take shelter from the rain



Do not shelter from the rain under the transformer or overhead line



Thunderstorms are easy to cause short circuit and discharge of bare wires or transformers, and strong winds may break wires, resulting in electric shock.



Do not take shelter from rain under trees or billboards



Do not stay under tall trees or large billboards close to power supply lines or take shelter from rain.



Travel two away



Keep away from ponding



When traveling in thunderstorm days, you should stay away from the sections with accumulated water. If you have to wade, you must observe whether there are electric equipment nearby to ensure safety and avoid electric shock.



Keep away from electric poles, street lamp poles and cable-stayed iron wires



The cable-stayed iron wire is close to the electric wire, which may cause accidental electrification in bad weather. The street lamp pole is prone to leakage through water. It is far away from the electric pole, street lamp pole and cable-stayed iron wire to prevent electric shock accidents.



Don't panic in case of accident



Please don't panic when the wire breaks and falls nearby



If the wire happens to fall nearby, don't panic. Jump with one leg or two legs together and leave the site 8~10 meters away, otherwise you may get an electric shock under the action of step voltage.



If you find the wire is broken, please dial 95598



If any wire is found to be broken in the water, do not handle it by yourself. Immediately mark the surrounding area to remind other pedestrians not to approach, and timely call 95598 to notify the power supply company for emergency treatment.



Don't rush to help someone when they are electrocuted and fall to the ground



If someone is found to have been electrocuted to the ground, do not save the person with bare hands. You must first cut off the power supply and use a dry insulating appliance to remove the wire before rescuing the person who has been electrocuted or dial 120 for on-site rescue.