{"id":829,"date":"2023-12-18T14:49:26","date_gmt":"2023-12-18T06:49:26","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&#038;p=829"},"modified":"2024-09-05T16:31:47","modified_gmt":"2024-09-05T08:31:47","slug":"lightning-protection-solutions-for-large-scale-grid-connected-photovoltaic-power-stations","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/pt\/blog\/lightning-protection-solutions-for-large-scale-grid-connected-photovoltaic-power-stations\/","title":{"rendered":"Solu\u00e7\u00f5es de prote\u00e7\u00e3o contra raios para centrais fotovoltaicas de grande escala ligadas \u00e0 rede"},"content":{"rendered":"<strong>A influ\u00eancia dos raios no sistema de gera\u00e7\u00e3o de energia fotovoltaica conectado \u00e0 rede em grande escala:<\/strong>\r\n\r\nThe harm of lightning to large-scale grid-connected photovoltaic power generation system is mainly divided into two types: direct lightning and inductive lightning.\r\n\r\nDirect lightning is a strong discharge between thunderclouds and ground equipment or lines, lightning flow through the object, will have a destructive effect of thermal and force effects, accompanied by electromagnetic effects and discharge on nearby objects. Most of the panels are installed on outdoor roofs or open places, so lightning is likely to directly hit the solar photovoltaic panels or brackets and transmission lines, causing damage to the equipment and even melting and burning.\r\n\r\nInductive lightning: lightning discharge will produce electrostatic effects and electromagnetic induction on nearby conductors, which can cause sparks between metal parts and cause fires when serious, which will damage electrical equipment such as solar panels and controllers or inverters, power distribution units, and AC loads.\r\n\r\nGround potential counterattack: In a solar power supply system with external lightning protection, lightning is introduced to the ground by the external lightning protection device. As a result, a high voltage is generated on the ground network and enters the device through the ground cable of the device. As a result, the controller, inverter, AC or DC load devices are damaged.\r\n\r\n<strong>Base de projeto de prote\u00e7\u00e3o contra raios para sistema de gera\u00e7\u00e3o de energia fotovoltaica centralizado em grande escala conectado \u00e0 rede:<\/strong>\r\n\r\nThe lightning protection of large-scale centralized grid-connected photovoltaic power generation system is different from that of general building electrical lightning protection, so it is necessary to design a reasonable and reliable lightning protection scheme according to the characteristics of large-scale centralized grid-connected photovoltaic power stations.\r\n\r\nLightning risk assessment for large-scale centralized grid-connected photovoltaic power stations: the assessment of lightning risk mainly follows the IEC 62305-2.\r\n\r\n<strong>Medidas de prote\u00e7\u00e3o contra raios para sistemas de gera\u00e7\u00e3o de energia fotovoltaica centralizados em grande escala conectados \u00e0 rede:<\/strong>\r\n\r\n<strong>1, prote\u00e7\u00e3o direta contra raios:<\/strong>\r\n\r\nFor large-scale centralized grid-connected photovoltaic power generation systems, due to the large number of photovoltaic equipment concentrated in the outdoor exposure and occupy a large amount of outdoor space, it is extremely vulnerable to the threat of lightning when thunderstorms occur. In order to ensure that the solar panels exposed outdoors are not damaged by direct lightning strikes, it should be set up direct lightning protection devices, the specific measures are as follows:\r\n\r\nA, Lightning arrester system\r\n\r\nB, Down-conductor system\r\n\r\nC, Grounded counterpoise\r\n\r\nWhen installing and setting the lightning rod, should fully consider whether the protection range of the lightning rod can cover all photovoltaic equipment.\r\n\r\n<strong>2, prote\u00e7\u00e3o contra raios indutivos:<\/strong>\r\n\r\nDevido \u00e0 tens\u00e3o indutiva causada pela descarga atmosf\u00e9rica e o surto causado por raios pode danificar os m\u00f3dulos fotovoltaicos e inversores, e os componentes eletr\u00f4nicos em equipamentos fotovoltaicos conectados \u00e0 rede centralizados de grande escala s\u00e3o geralmente mais sens\u00edveis, e os custos de manuten\u00e7\u00e3o e reparo do equipamento s\u00e3o altos, portanto, uma prote\u00e7\u00e3o eficaz contra surtos \u00e9 essencial. Reduza os danos aos equipamentos causados \u200b\u200bpor surtos e sobretens\u00f5es atmosf\u00e9ricas instalando protetores contra surtos em cabos energizados. Omedidas espec\u00edficas s\u00e3o as seguintes:\r\n\r\n<strong>A, prote\u00e7\u00e3o contra surtos:<\/strong>\r\n\r\nDc side (combiner box\/DC panel): Surge protection devices are installed at each DC input end of the inverter.\r\n\r\nLarge distributed photovoltaic power generation system optional: BRITEC BRPV3-1000T1\/BRPV3-1000 photovoltaic power supply lightning arrester.\r\n\r\nSmall distributed photovoltaic power generation system optional: BRITEC BR-40 24\/BR-40 48 DC 24V\/48V power surge arrester.\r\n\r\nAc side (AC panel): Install a surge protector in the control cabinet to prevent lightning waves from being invaded by the protective cable.\r\n\r\nSingle-phase Optional: BRITEC BR-40 2P 40KA single-phase power surge arrester.\r\n\r\nThree-phase Optional: BRITEC BR-40 4P 40 kA three-phase power surge arrester.\r\n\r\n<strong>B, Blindagem eletromagn\u00e9tica:<\/strong>\r\n\r\nA blindagem eletromagn\u00e9tica de edif\u00edcios, linhas e equipamentos para o mundo exterior evita pulsos eletromagn\u00e9ticos e indu\u00e7\u00e3o de altas tens\u00f5es. A blindagem pode ser um inv\u00f3lucro condutor selado, uma capa coaxial ou um tubo de cabo que passa atrav\u00e9s do cabo ou um fio de prote\u00e7\u00e3o altamente exposto \u00e9 colocado no cabo na vala do cabo. A carca\u00e7a do dispositivo de blindagem deve ser conectada ao fio terra do equipamento.","protected":false},"featured_media":830,"parent":0,"menu_order":162,"template":"","meta":{"_acf_changed":false},"blog_category":[8],"class_list":["post-829","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-company-news"],"acf":{"des":"The harm of lightning to large-scale grid-connected photovoltaic power generation system is mainly divided into two types: direct lightning and inductive lightning.","txt":"<strong>The influence of lightning on large-scale grid-connected photovoltaic power generation system:<\/strong>\r\n\r\nThe harm of lightning to large-scale grid-connected photovoltaic power generation system is mainly divided into two types: direct lightning and inductive lightning.\r\n\r\nDirect lightning is a strong discharge between thunderclouds and ground equipment or lines, lightning flow through the object, will have a destructive effect of thermal and force effects, accompanied by electromagnetic effects and discharge on nearby objects. Most of the panels are installed on outdoor roofs or open places, so lightning is likely to directly hit the solar photovoltaic panels or brackets and transmission lines, causing damage to the equipment and even melting and burning.\r\n\r\nInductive lightning: lightning discharge will produce electrostatic effects and electromagnetic induction on nearby conductors, which can cause sparks between metal parts and cause fires when serious, which will damage electrical equipment such as solar panels and controllers or inverters, power distribution units, and AC loads.\r\n\r\nGround potential counterattack: In a solar power supply system with external lightning protection, lightning is introduced to the ground by the external lightning protection device. As a result, a high voltage is generated on the ground network and enters the device through the ground cable of the device. As a result, the controller, inverter, AC or DC load devices are damaged.\r\n\r\n<strong>Design basis of lightning protection for large-scale centralized grid-connected photovoltaic power generation system:<\/strong>\r\n\r\nThe lightning protection of large-scale centralized grid-connected photovoltaic power generation system is different from that of general building electrical lightning protection, so it is necessary to design a reasonable and reliable lightning protection scheme according to the characteristics of large-scale centralized grid-connected photovoltaic power stations.\r\n\r\nLightning risk assessment for large-scale centralized grid-connected photovoltaic power stations: the assessment of lightning risk mainly follows the IEC 62305-2.\r\n\r\n<strong>Lightning protection measures for large-scale centralized grid-connected photovoltaic power generation system:<\/strong>\r\n\r\n<strong>1, Direct lightning protection:<\/strong>\r\n\r\nFor large-scale centralized grid-connected photovoltaic power generation systems, due to the large number of photovoltaic equipment concentrated in the outdoor exposure and occupy a large amount of outdoor space, it is extremely vulnerable to the threat of lightning when thunderstorms occur. In order to ensure that the solar panels exposed outdoors are not damaged by direct lightning strikes, it should be set up direct lightning protection devices, the specific measures are as follows:\r\n\r\nA, Lightning arrester system\r\n\r\nB, Down-conductor system\r\n\r\nC, Grounded counterpoise\r\n\r\nWhen installing and setting the lightning rod, should fully consider whether the protection range of the lightning rod can cover all photovoltaic equipment.\r\n\r\n<strong>2, Inductive lightning protection:<\/strong>\r\n\r\nDue to the inductive voltage caused by lightning discharge and the surge caused by lightning may damage the photovoltaic modules and inverters, and the electronic components in large-scale centralized grid-connected photovoltaic equipment are usually more sensitive, and the maintenance and repair costs of the equipment are high, so effective surge protection is essential. Reduce damage to equipment caused by surges and lightning overvoltage by installing surge protectors on live cables. The specific measures are as follows:\r\n\r\n<strong>A, Surge protection:<\/strong>\r\n\r\nDc side (combiner box\/DC panel): Surge protection devices are installed at each DC input end of the inverter.\r\n\r\nLarge distributed photovoltaic power generation system optional: BRITEC BRPV3-1000T1\/BRPV3-1000 photovoltaic power supply lightning arrester.\r\n\r\nSmall distributed photovoltaic power generation system optional: BRITEC BR-40 24\/BR-40 48 DC 24V\/48V power surge arrester.\r\n\r\nAc side (AC panel): Install a surge protector in the control cabinet to prevent lightning waves from being invaded by the protective cable.\r\n\r\nSingle-phase Optional: BRITEC BR-40 2P 40KA single-phase power surge arrester.\r\n\r\nThree-phase Optional: BRITEC BR-40 4P 40 kA three-phase power surge arrester.\r\n\r\n<strong>B, Electromagnetic shielding:<\/strong>\r\n\r\nElectromagnetic shielding of buildings, lines and equipment to the outside world prevents electromagnetic pulses and induction of high voltages. The shielding can be a sealed conductive shell, a coaxial jacket or a cable tube that passes through the cable or a high exposed protection wire is laid on the cable in the cable trench. The shell of the shielding device should be connected to the ground wire of the equipment."},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/blog\/829","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/media\/830"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/media?parent=829"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/blog_category?post=829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}