{"id":15771,"date":"2024-08-07T11:09:47","date_gmt":"2024-08-07T09:09:47","guid":{"rendered":"https:\/\/cubeconcepts.de\/?p=15771"},"modified":"2025-05-14T17:02:28","modified_gmt":"2025-05-14T15:02:28","slug":"jalovy-proud-pro-fotovoltaicke-systemy","status":"publish","type":"post","link":"https:\/\/cubeconcepts.de\/cz\/blindstrom-bei-pv-anlagen\/","title":{"rendered":"Jalov\u00fd proud pro fotovoltaick\u00e9 syst\u00e9my"},"content":{"rendered":"<p><strong>Jalov\u00fd proud<\/strong> vznik\u00e1 s <strong>Fotovoltaick\u00e9 syst\u00e9my<\/strong>jakmile st\u0159\u00edda\u010de p\u0159em\u011bn\u00ed stejnosm\u011brn\u00fd proud ze sol\u00e1rn\u00edch modul\u016f na st\u0159\u00eddav\u00fd. Proto\u017ee jalov\u00e9 proudy vznikaj\u00ed pouze ve st\u0159\u00eddav\u00fdch nebo t\u0159\u00edf\u00e1zov\u00fdch s\u00edt\u00edch, tento jev se nevyskytuje v kabelech, kter\u00e9 propojuj\u00ed moduly navz\u00e1jem, a v kabelech string\u016f, kter\u00e9 propojuj\u00ed stringy se st\u0159\u00edda\u010dem. Stejnosm\u011brn\u00e1 strana <a href=\"https:\/\/cubeconcepts.de\/cz\/zapojeni-fotovoltaickych-modulu\/\">Zapojen\u00ed fotovoltaick\u00fdch modul\u016f<\/a> nen\u00ed proto ovlivn\u011bn jalov\u00fdm proudem, kter\u00fd se tak\u00e9 ozna\u010duje jako jalov\u00fd proud.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Stru\u010dn\u00e9 vysv\u011btlen\u00ed jalov\u00e9ho proudu<\/h2>\n\n\n\n<p>Jalov\u00fd proud je term\u00edn pou\u017e\u00edvan\u00fd v elektrotechnice a ozna\u010duje \u010d\u00e1st elektrick\u00e9ho proudu, kter\u00e1 v syst\u00e9mu st\u0159\u00eddav\u00e9ho proudu nevykon\u00e1v\u00e1 \u017e\u00e1dnou u\u017eite\u010dnou pr\u00e1ci nebo nen\u00ed spot\u0159ebi\u010dem p\u0159em\u011bn\u011bna. Podle st\u0159\u00edda\u010de fotovoltaick\u00e9ho syst\u00e9mu tedy existuj\u00ed dva druhy proudu: <strong>Aktivn\u00ed proud<\/strong>skute\u010dn\u011b pou\u017e\u00edvan\u00fd proud, kter\u00fd vykon\u00e1v\u00e1 pr\u00e1ci, a jalov\u00fd proud, kter\u00fd nevykon\u00e1v\u00e1 \u017e\u00e1dnou pr\u00e1ci, ale je nutn\u00fd k udr\u017een\u00ed proudu. <strong>elektrick\u00e9 a magnetick\u00e9 pole<\/strong> a udr\u017eovat ji.<\/p>\n\n\n\n<p>Je zp\u016fsobena induk\u010dn\u00ed a kapacitn\u00ed z\u00e1t\u011b\u017e\u00ed, jako jsou c\u00edvky (induk\u010dnosti) a kondenz\u00e1tory (kapacity). Pou\u017e\u00edv\u00e1 se kv\u016fli konstantn\u00ed <strong>Struktura pole st\u0159\u00eddav\u00e9ho proudu<\/strong>kter\u00fd v Evrop\u011b kmit\u00e1 s frekvenc\u00ed 50 Hz. Pokud doch\u00e1z\u00ed k f\u00e1zov\u00fdm posun\u016fm mezi proudem a nap\u011bt\u00edm nebo v d\u016fsledku vysok\u00e9ho po\u010dtu instalovan\u00fdch c\u00edvek a kondenz\u00e1tor\u016f, zvy\u0161uje se pod\u00edl jalov\u00e9ho proudu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fotovoltaick\u00e9 syst\u00e9my mus\u00ed poskytovat jalov\u00fd proud<\/h2>\n\n\n\n<p>A\u010dkoli jalov\u00fd proud v podstat\u011b p\u0159edstavuje dal\u0161\u00ed z\u00e1t\u011b\u017e pro cel\u00fd syst\u00e9m, nep\u0159edstavuje pro fotovoltaick\u00e9 syst\u00e9my p\u0159ipojen\u00e9 k ve\u0159ejn\u00e9 s\u00edti \u017e\u00e1dn\u00fd probl\u00e9m, <strong>povinn\u00e9<\/strong>. Tyto syst\u00e9my mus\u00ed b\u00fdt um\u00edst\u011bny na <strong>S\u00ed\u0165ov\u00e1 podpora<\/strong> prost\u0159ednictv\u00edm <strong>Udr\u017eov\u00e1n\u00ed statick\u00e9ho nap\u011bt\u00ed<\/strong> nebo tzv. <strong>Poskytov\u00e1n\u00ed jalov\u00e9ho v\u00fdkonu<\/strong> \u00fa\u010dastnit. Rozhoduj\u00edc\u00edmi faktory jsou <a href=\"https:\/\/cubeconcepts.de\/cz\/faktor-dimenzovani-menicu\/\">M\u011bni\u010d<\/a>.<\/p>\n\n\n\n<p>To je od listopadu 2018 upraveno pro fotovoltaick\u00e9 syst\u00e9my od 135 kW normou VDE-AR-N 4105. Aplika\u010dn\u00ed pravidlo uv\u00e1d\u00ed, \u017ee p\u0159\u00edslu\u0161n\u00fd provozovatel s\u00edt\u011b m\u016f\u017ee provozovateli soustavy poskytnout \u010dty\u0159i r\u016fzn\u00e9 mo\u017enosti poskytov\u00e1n\u00ed jalov\u00e9ho v\u00fdkonu.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nap\u011b\u0165ov\u00e1 charakteristika jalov\u00e9ho v\u00fdkonu Q(U)<\/li>\n\n\n\n<li>K\u0159ivka charakteristiky jalov\u00e9ho v\u00fdkonu jako funkce<\/li>\n\n\n\n<li>Jalov\u00fd v\u00fdkon s funkc\u00ed omezen\u00ed nap\u011bt\u00ed<\/li>\n\n\n\n<li>Pevn\u00fd faktor posunut\u00ed cos phi<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p>N\u011bkte\u0159\u00ed provozovatel\u00e9 distribu\u010dn\u00edch s\u00edt\u00ed vy\u017eaduj\u00ed tak\u00e9 kombinace t\u011bchto specifikac\u00ed. Aby bylo zaji\u0161t\u011bno spln\u011bn\u00ed p\u0159esn\u00fdch specifikac\u00ed provozovatele distribu\u010dn\u00ed s\u00edt\u011b, m\u011b\u0159\u00ed m\u011b\u0159\u00edc\u00ed jednotka neust\u00e1le aktu\u00e1ln\u00ed hodnoty nap\u011bt\u00ed, \u010dinn\u00e9ho v\u00fdkonu a jalov\u00e9ho proudu v distribu\u010dn\u00ed s\u00edti. <strong>Bod p\u0159ipojen\u00ed k s\u00edti<\/strong>. \u0158\u00eddic\u00ed jednotka pak p\u0159en\u00e1\u0161\u00ed \u017e\u00e1dan\u00e9 hodnoty do m\u011bni\u010d\u016f. T\u00e9m\u011b\u0159 ve v\u0161ech p\u0159\u00edpadech se proto provozovatel\u00e9 v\u011bt\u0161\u00edch fotovoltaick\u00fdch syst\u00e9m\u016f neobejdou bez <strong>Technologie Telecontrol<\/strong> venku. Jalov\u00fd v\u00fdkon je neust\u00e1le optimalizov\u00e1n prost\u0159ednictv\u00edm interakce jednotliv\u00fdch komponent, \u010d\u00edm\u017e se zvy\u0161uje \u00fa\u010din\u00edk cel\u00e9 soustavy.\u00a0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">St\u0159\u00edda\u010de reguluj\u00ed jalov\u00fd proud fotovoltaick\u00fdch syst\u00e9m\u016f<\/h2>\n\n\n\n<p>Vzhledem k rostouc\u00edmu pod\u00edlu decentralizovan\u00fdch v\u00fdrobc\u016f energie, jako jsou fotovoltaick\u00e9 a v\u011btrn\u00e9 elektr\u00e1rny, ji\u017e nelze jalov\u00fd v\u00fdkon v s\u00edti \u0159\u00eddit centr\u00e1ln\u011b, jak to bylo d\u0159\u00edve mo\u017en\u00e9 u jednotliv\u00fdch velk\u00fdch uheln\u00fdch a jadern\u00fdch elektr\u00e1ren. Z tohoto d\u016fvodu je <strong>M\u011bni\u010d<\/strong> Mus\u00ed zaji\u0161\u0165ovat kapacitn\u00ed a induktivn\u00ed jalov\u00fd v\u00fdkon pomoc\u00ed kondenz\u00e1tor\u016f a c\u00edvek, co\u017e rovn\u011b\u017e p\u0159isp\u00edv\u00e1 k regulaci nap\u011bt\u00ed v s\u00edti. To je d\u016fle\u017eit\u00e9 zejm\u00e9na u s\u00edt\u00ed s extr\u00e9mn\u00edmi \u00farovn\u011bmi nap\u011bt\u00ed a frekvence. Pomoc\u00ed komponent\u016f technologie telekontroly poskytuj\u00ed st\u0159\u00edda\u010de v\u017edy tzv. <strong>Optim\u00e1ln\u00ed a maxim\u00e1ln\u00ed v\u00fdstupn\u00ed v\u00fdkon st\u0159\u00eddav\u00e9ho proudu<\/strong> jako zd\u00e1nliv\u00fd v\u00fdkon, zat\u00edmco v\u00fdkon generovan\u00fd fotovoltaick\u00fdmi moduly p\u0159edstavuje \u010dinn\u00fd v\u00fdkon.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jalov\u00fd proud ve fotovoltaick\u00fdch syst\u00e9mech je nevyhnuteln\u00fd, ale kontrolovateln\u00fd a n\u011bkdy u\u017eite\u010dn\u00fd.<\/h2>\n\n\n\n<p>Jalov\u00fd proud hraje d\u016fle\u017eitou roli p\u0159i integraci fotovoltaick\u00fdch syst\u00e9m\u016f do ve\u0159ejn\u00e9 elektrick\u00e9 s\u00edt\u011b. P\u0159esto\u017ee nevykon\u00e1v\u00e1 \u017e\u00e1dnou u\u017eite\u010dnou pr\u00e1ci, je nezbytn\u00fd pro generov\u00e1n\u00ed a udr\u017eov\u00e1n\u00ed elektrick\u00fdch a magnetick\u00fdch pol\u00ed ve st\u0159\u00eddav\u00fdch syst\u00e9mech. Jalov\u00fd proud je nevyhnutelnou, ale kontrolovatelnou sou\u010d\u00e1st\u00ed provozu fotovoltaick\u00fdch syst\u00e9m\u016f, kter\u00e9 jsou p\u0159ipojeny k s\u00edti.<\/p>\n\n\n\n<p>Vzhledem k rostouc\u00edmu pod\u00edlu decentralizovan\u00fdch gener\u00e1tor\u016f energie, jako jsou fotovoltaick\u00e9 a v\u011btrn\u00e9 elektr\u00e1rny, ji\u017e nen\u00ed mo\u017en\u00e9 centr\u00e1ln\u00ed \u0159\u00edzen\u00ed jalov\u00e9ho v\u00fdkonu. St\u0159\u00edda\u010de proto p\u0159eb\u00edraj\u00ed tento \u00fakol a zaji\u0161\u0165uj\u00ed pot\u0159ebn\u00fd kapacitn\u00ed a induktivn\u00ed jalov\u00fd v\u00fdkon, kter\u00fd rovn\u011b\u017e p\u0159isp\u00edv\u00e1 k regulaci nap\u011bt\u00ed v s\u00edti. To je d\u016fle\u017eit\u00e9 zejm\u00e9na pro s\u00edt\u011b s extr\u00e9mn\u00edmi \u00farovn\u011bmi nap\u011bt\u00ed a frekvence.<\/p>\n\n\n\n<p>Zaji\u0161\u0165ov\u00e1n\u00ed a optim\u00e1ln\u00ed regulace jalov\u00e9ho v\u00fdkonu pomoc\u00ed st\u0159\u00edda\u010d\u016f a telekontroln\u00edch technologi\u00ed jsou kl\u00ed\u010dov\u00e9 pro zv\u00fd\u0161en\u00ed \u00fa\u010din\u00edku fotovoltaick\u00fdch syst\u00e9m\u016f a spln\u011bn\u00ed po\u017eadavk\u016f provozovatele s\u00edt\u011b. Celkov\u011b to v\u00fdznamn\u011b p\u0159isp\u00edv\u00e1 ke stabilit\u011b a \u00fa\u010dinnosti elektrick\u00e9 s\u00edt\u011b.<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/cubeconcepts.de\/cz\/kategorie\/fotovoltaicka-temata\/\">Zp\u011bt na p\u0159ehled<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Blindstrom entsteht bei PV-Anlagen, sobald die Wechselrichter den Gleichstrom der Solarmodule in Wechselstrom umwandeln. Da sich Blindstr\u00f6me nur bei Wechsel- oder Drehstrom-Netzen bilden, tritt dieses Ph\u00e4nomen bei den Leitungen, die die Module miteinander verbinden, und den String-Leitungen, die die Strings mit dem Wechselrichter verbinden, nicht auf. Die DC-seitige Verkabelung von PV-Modulen ist also von Blindstrom, [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":15773,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[50,25],"tags":[],"class_list":["post-15771","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-photovoltaik-themen-in-deutschland-wissenswertes-fuer-energieprojekte","category-photovoltaik-themen"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Blindstrom bei PV-Anlagen | CUBE CONCEPTS<\/title>\n<meta name=\"description\" content=\"Blindstrom bei PV-Anlagen ist unvermeidlich, aber kontrollierbar durch Wechselrichter und teilweise n\u00fctzlich.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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