{"id":750,"date":"2023-12-19T20:39:19","date_gmt":"2023-12-19T12:39:19","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&p=750"},"modified":"2024-09-05T16:35:09","modified_gmt":"2024-09-05T08:35:09","slug":"how-surge-protection-devices-protect-photovoltaic-plants","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/sv\/blog\/how-surge-protection-devices-protect-photovoltaic-plants\/","title":{"rendered":"Hur \u00f6versp\u00e4nningsskydd skyddar solcellsanl\u00e4ggningar"},"content":{"rendered":"P\u00e5 solcellsanl\u00e4ggningar m\u00e5ste SPD uppfylla specifika krav f\u00f6r att s\u00e4kerst\u00e4lla kontinuerlig drift och energiproduktion.<\/strong>\r\n\r\nN\u00e4r du designar en PV-anl\u00e4ggning \u00e4r det viktigt att \u00f6verv\u00e4ga installationen av \u00f6versp\u00e4nningsskyddsanordningar (SPD). \u00d6versp\u00e4nningar och n\u00e4tverksst\u00f6rningar kan leda till stillest\u00e5nd, vilket minskar anl\u00e4ggningens prestanda. D\u00e4rf\u00f6r b\u00f6r alla f\u00f6rh\u00e5llanden som p\u00e5verkar energiproduktion och -distribution beaktas vid utformningen av den elektriska installationen.\r\n\r\nVarf\u00f6r \u00e4r SPD en h\u00f6gsta prioritet i solcellsanl\u00e4ggningar?<\/strong>\r\n\r\nSolar panels are installed outside to convert solar energy into electricity. This outdoor location makes them directly exposed to harsh conditions like rain, wind and dust. Among the weather conditions lightning strikes require specific attention as they can severely affect the safety and performance of a PV plant. They originate in a cumulonimbus cloud and terminate on the ground. When the lightning strike hits the ground, it discharges energy, affecting the electrical field on the ground. For the solar PV plant this poses two risks:\r\n\r\nA direct impact which can physically destroy the solar equipment on a rooftop\r\n\r\nTransitory over voltages passing through cables by magnetic coupling, which can lead to the damage of sensitive components such as printed circuit boards (PCB).\r\n\r\nAs far as the direct impact is concerned, \u2018External Lightning Protects\u2019 (ELP) provide the required protection according to IEC 62305, which describes how to evaluate if your location needs such protection, and what should be the preferred option (meshed cages, air terminal, etc.). The concept is simple: make sure the lightning will strike a metallic rod installed on the highest point of your plant and dispel the energy directly to the ground through a copper down conductor.\r\n\r\nWhen it comes to transitory over voltages, however, SPDs are required. They are installed in parallel into the circuit protection boards to divert the energy to the ground and limit the overvoltage up to such value acceptable to the end equipment.\r\n\r\nAs soon as ELP is installed at a PV plant, it is mandatory that an SPD be installed, too. If the PV plant is not equipped with an ELP, the installation of an SPD is highly recommended to limit network perturbations (transient over voltages).\r\n\r\nHur fungerar en SPD f\u00f6r att skydda DC-sidan av solkraftverk?<\/strong>\r\n\r\nF\u00f6r att garantera att energin kommer att fl\u00f6da till marken f\u00f6rst f\u00f6r att begr\u00e4nsa \u00f6versp\u00e4nningar \u00e4r den viktigaste komponenten Metal Oxide Varistor (MOV, \u2018Varistor\u2019 st\u00e5r f\u00f6r VARI-able resi-STOR). Denna komponent har s\u00e5dan egendom att under normala f\u00f6rh\u00e5llanden (inga \u00f6versp\u00e4nningar) \u00e4r motst\u00e5ndet tillr\u00e4ckligt h\u00f6gt f\u00f6r att inte m\u00f6jligg\u00f6ra nominella str\u00f6mmar som passerar genom den. Med start vid en viss \u00f6versp\u00e4nningsniv\u00e5 kommer motst\u00e5ndet snabbt att sjunka, \u00f6ppna v\u00e4gen till marken och \u00e5terg\u00e5 till ett normalt tillst\u00e5nd en g\u00e5ngenergin har f\u00f6rsvunnit. Denna process till\u00e5ter begr\u00e4nsning av \u00f6versp\u00e4nningsniv\u00e5n som n\u00e5r all utrustning som \u00e4r ansluten nedstr\u00f6ms.\r\n\r\n\"\"\r\n\r\nTyp 1+2 SPD kontra standard Typ 2 SPD, vilken \u00e4r den r\u00e4tta?<\/strong>\r\n\r\nThere are different types of SPDs available which vary in terms of resistance: Type 1, Type 2, and Type 1+2. A Type 1 SPD can cope with a direct strike which bring an energetic surge, whereas a Type 2 limits over voltages from various sources. Both characteristics can be combined into a \u201cType 1+2\u201d for complete protection.\r\n\r\nIn PV plants the challenge is to choose the appropriate surge protection to withstand pure energy 10\/350\u00b5s waveform currents (almost 10 times more powerful than type 2 8\/20 \u00b5s waveform) while at the same time taking space into consideration. In an inverter or junction box space always is top priority. Britec\u2019s BRPV series provides both Type 1+2 and Type 2 DC surge protection can protect against over voltages due to lightning strikes or network surge current.\r\n\r\n\"\"\"\"\"\"","protected":false},"featured_media":779,"parent":0,"menu_order":184,"template":"","meta":{"_acf_changed":false},"blog_category":[8],"class_list":["post-750","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-company-news"],"acf":{"des":"At PV plants, SPDs have to fulfill specific requirements to ensure continuous operation and energy generation.","txt":"At PV plants, SPDs have to fulfill specific requirements to ensure continuous operation and energy generation.<\/strong>\r\n\r\nWhen designing a PV plant, it is important to consider the installation of surge protection devices (SPDs). Surges and network disturbances can lead to downtime, reducing the performance of the plant. Therefore, any conditions affecting energy generation and distribution should be taken into consideration when designing the electrical installation.\r\n\r\nWhy are SPDs a top priority in PV plants?<\/strong>\r\n\r\nSolar panels are installed outside to convert solar energy into electricity. This outdoor location makes them directly exposed to harsh conditions like rain, wind and dust. Among the weather conditions lightning strikes require specific attention as they can severely affect the safety and performance of a PV plant. They originate in a cumulonimbus cloud and terminate on the ground. When the lightning strike hits the ground, it discharges energy, affecting the electrical field on the ground. For the solar PV plant this poses two risks:\r\n\r\nA direct impact which can physically destroy the solar equipment on a rooftop\r\n\r\nTransitory over voltages passing through cables by magnetic coupling, which can lead to the damage of sensitive components such as printed circuit boards (PCB).\r\n\r\nAs far as the direct impact is concerned, \u2018External Lightning Protects\u2019 (ELP) provide the required protection according to IEC 62305, which describes how to evaluate if your location needs such protection, and what should be the preferred option (meshed cages, air terminal, etc.). The concept is simple: make sure the lightning will strike a metallic rod installed on the highest point of your plant and dispel the energy directly to the ground through a copper down conductor.\r\n\r\nWhen it comes to transitory over voltages, however, SPDs are required. They are installed in parallel into the circuit protection boards to divert the energy to the ground and limit the overvoltage up to such value acceptable to the end equipment.\r\n\r\nAs soon as ELP is installed at a PV plant, it is mandatory that an SPD be installed, too. If the PV plant is not equipped with an ELP, the installation of an SPD is highly recommended to limit network perturbations (transient over voltages).\r\n\r\nHow does an SPD work to protect the DC side of solar plants?<\/strong>\r\n\r\nTo guarantee the energy will flow to the ground first to limit over voltages the most important component is the Metal Oxide Varistor (MOV, \u2018Varistor\u2019 stands for VARI-able resi-STOR). This component has such propriety that in normal conditions (no over voltages) the resistance is high enough to not make possible nominal currents passing through it. Starting at a certain overvoltage level, the resistance will quickly drop, opening the path to the ground and coming back to a normal condition once the energy has been dissipated. This process allows limitation of the overvoltage level reaching all equipment connected downstream.\r\n\r\n\"\"\r\n\r\nType1+2 SPD versus standard Type 2 SPD, which one is the right one?<\/strong>\r\n\r\nThere are different types of SPDs available which vary in terms of resistance: Type 1, Type 2, and Type 1+2. A Type 1 SPD can cope with a direct strike which bring an energetic surge, whereas a Type 2 limits over voltages from various sources. Both characteristics can be combined into a \u201cType 1+2\u201d for complete protection.\r\n\r\nIn PV plants the challenge is to choose the appropriate surge protection to withstand pure energy 10\/350\u00b5s waveform currents (almost 10 times more powerful than type 2 8\/20 \u00b5s waveform) while at the same time taking space into consideration. In an inverter or junction box space always is top priority. Britec\u2019s BRPV series provides both Type 1+2 and Type 2 DC surge protection can protect against over voltages due to lightning strikes or network surge current.\r\n\r\n\"\"\"\"\"\""},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/sv\/wp-json\/wp\/v2\/blog\/750","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/sv\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/sv\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/sv\/wp-json\/wp\/v2\/media\/779"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/sv\/wp-json\/wp\/v2\/media?parent=750"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/sv\/wp-json\/wp\/v2\/blog_category?post=750"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}