{"id":1801,"date":"2025-09-12T15:29:00","date_gmt":"2025-09-12T07:29:00","guid":{"rendered":"https:\/\/www.bosaenergy.cn\/?p=1801"},"modified":"2026-03-20T14:02:58","modified_gmt":"2026-03-20T06:02:58","slug":"forskellen-mellem-pcer-og-solcelledrevne-invertere","status":"publish","type":"post","link":"https:\/\/www.bosaenergy.cn\/da\/the-difference-between-pcs-and-photovoltaic-inverters\/","title":{"rendered":"Forskellen mellem pc&#039;er og solcelledrevne invertere"},"content":{"rendered":"<p class=\"wp-block-paragraph\" id=\"ember62\"><strong>PV-invertere<\/strong> er kun egnede til nettilsluttede applikationer, mens <strong>stk.<\/strong> kan bruges til b\u00e5de on-grid og off-grid applikationer. <strong>PV-invertere<\/strong> og<strong> stk.<\/strong> deler den samme topologi. Trefasede invertere\/konvertere bruger en tre-niveau I-type\/T-type topologi, ANPC- eller NPC-kredsl\u00f8b. Enfasede invertere\/konvertere bruger en H5\/H6-topologi. Hardwaren i PV-invertere og pc&#039;er er n\u00e6sten identisk, med kun sm\u00e5 forskelle i DC-sideledningsgr\u00e6nsefladerne.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember63\">DC-siden af en <strong>solcelle-inverter<\/strong> er forbundet til solcellemoduler. Figuren nedenfor viser IV-kurven for et solcellemodul. Under visse forhold, s\u00e5som en bestr\u00e5lingsstyrke p\u00e5 1000 W\/m\u00b2, forbliver modulets str\u00f8m stabil p\u00e5 over 18 A inden for sp\u00e6ndingsomr\u00e5det 0-35 V. N\u00e5r sp\u00e6ndingen stiger, falder str\u00f8mmen. IV-kurven viser, at solcellemodulet opretholder en stabil str\u00f8m, n\u00e5r det genererer elektricitet, og dermed udviser karakteristika for en str\u00f8mkilde. Imidlertid varierer sp\u00e6ndingen kontinuerligt, p\u00e5virket af faktorer som bestr\u00e5lingsintensitet, temperatur, luftkvalitet og overfladerenhed.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/media.licdn.com\/dms\/image\/v2\/D5612AQHCdlCk5pB_Hg\/article-inline_image-shrink_1000_1488\/B56ZkxXQeBG0AQ-\/0\/1757469805415?e=1768435200&amp;v=beta&amp;t=cwzGnLmZUFM_4_4xDTE0zZ9VKyWBqyehhMY5M3i0jrM\" alt=\"\u6587\u7ae0\u5185\u5bb9\" style=\"aspect-ratio:1.3792360325413502;width:476px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember65\">Den effekt, der genereres af et solcellemodul (P) = sp\u00e6nding (U) x str\u00f8m (I). Langs IV-kurven repr\u00e6senterer arealet af rektanglet dannet af V-v\u00e6rdien p\u00e5 den vandrette akse og I-v\u00e6rdien p\u00e5 den lodrette akse modulets effektgenereringsv\u00e6rdi. Inden for disse rektangler er det maksimale areal den effektv\u00e6rdi, hvor MPPT (Maximum Power Point Tracking) er placeret. Se PV-kurven for modulet nedenfor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember66\">MPPT&#039;en for et modul er placeret p\u00e5 toppen af en bakke, svarende til toppen af en lille bakke. PV-kurven viser, at den str\u00f8m, der genereres af et solcellemodul, konstant \u00e6ndrer sig.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/media.licdn.com\/dms\/image\/v2\/D5612AQFzloe4vBcRNg\/article-inline_image-shrink_1000_1488\/B56ZkxZHJrHcAQ-\/0\/1757470291501?e=1768435200&amp;v=beta&amp;t=D_CjpIl3jphR-ZOunnpLQhj-wT_Vnl6VtaLSFbD2HgE\" alt=\"\u6587\u7ae0\u5185\u5bb9\" style=\"aspect-ratio:1.3532443504691423;width:476px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember68\">Fordi solcellebatterier ikke kan generere stabil sp\u00e6nding og str\u00f8m under str\u00f8mproduktion, <strong>solcelledrevne invertere<\/strong> kan ikke etablere vekselsp\u00e6nding og -frekvens under str\u00f8mproduktion. De kan kun bruges til nettilsluttede applikationer, hvor de k\u00f8rer en fasel\u00e5st sl\u00f8jfe (PLL)-styringsstrategi for at injicere str\u00f8m efter nettets sinusformede sp\u00e6ndings- og str\u00f8mkurveformer. Derfor omtales fotovoltaiske str\u00f8mkilder ofte som str\u00f8mkilder, ogs\u00e5 kendt som P\/Q-kilder.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember69\">DC-siden af pc&#039;en er forbundet til et elektrokemisk\/genopladeligt batteri. Et typisk eksempel er et LFP-batteri. F\u00f8lgende figur viser en SOC-V-kurve og -tabel for opladning og afladning af et LFP-batteri. Sp\u00e6ndingen p\u00e5 et litiumbatteri \u00e6ndrer sig kun med SOC&#039;en. Under transiente forhold er sp\u00e6ndingen stabil og oplever ikke pludselige stigninger eller fald. Derfor har et litiumbatteri en sp\u00e6ndingskildes egenskaber.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/media.licdn.com\/dms\/image\/v2\/D5612AQHGfbwzDv_2vg\/article-inline_image-shrink_1500_2232\/B56ZkxbmEPJwAU-\/0\/1757470943129?e=1768435200&amp;v=beta&amp;t=8ob90HPa4nsxGJQ61sGNlF5gDo7XvUxzhNibG6LJITY\" alt=\"\u6587\u7ae0\u5185\u5bb9\" style=\"aspect-ratio:2.6341513608067086;width:576px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember71\"><strong>stk. <\/strong>Oplad og aflade litiumbatterier via ensretning eller inversion. Tilsvarende er opladnings- og afladeeffekt (P) = sp\u00e6nding (U) x str\u00f8m (I). Givet en fast sp\u00e6nding kan effektudgangen styres ved blot at styre str\u00f8mmens st\u00f8rrelse og retning. N\u00e5r der udf\u00f8res opladning\/aflade\/inversion ensretning for nettilsluttet (f\u00f8lgende) drift, anvender pc&#039;erne en fasel\u00e5st sl\u00f8jfe (PLL) kontrolstrategi, der injicerer eller absorberer energi i overensstemmelse med nettets sp\u00e6ndings- og str\u00f8ms sinusformede b\u00f8lgeformer. Under off-grid (tilslutning til nettet) drift, da sp\u00e6ndingen og effekten fra DC-str\u00f8mforsyningen er kontrollerbare, <strong>stk. <\/strong>kan bestemme AC-sp\u00e6ndingen og -frekvensen. En DSP-chip styrer genereringen af sinusformede kurver for netsp\u00e6nding\/str\u00f8m og 50\/60 Hz-frekvenser. Derfor kaldes energilagringsstr\u00f8mforsyninger, der anvendes i off-grid-applikationer, ofte for sp\u00e6ndingskilder, ogs\u00e5 kendt som V\/F-kilder.<\/p>","protected":false},"excerpt":{"rendered":"<p>PV inverters are only suitable for grid-connected applications, while pcs can be used for both on-grid and off-grid applications. PV inverters and pcs share the same topology. Three-phase inverters\/converters use a three-level I-type\/T-type topology, ANPC or NPC circuits. Single-phase inverters\/converters use an H5\/H6 topology. The hardware of PV inverters and pcs is nearly identical, with [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1802,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1801","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The difference between pcs and photovoltaic inverters - BOSA lithium battery<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bosaenergy.cn\/da\/forskellen-mellem-pcer-og-solcelledrevne-invertere\/\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The difference between pcs and photovoltaic inverters - BOSA lithium battery\" \/>\n<meta property=\"og:description\" content=\"PV inverters are only suitable for grid-connected applications, while pcs can be used for both on-grid and off-grid applications. PV inverters and pcs share the same topology. Three-phase inverters\/converters use a three-level I-type\/T-type topology, ANPC or NPC circuits. Single-phase inverters\/converters use an H5\/H6 topology. 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