{"id":8268,"date":"2023-08-01T15:00:00","date_gmt":"2023-08-01T13:00:00","guid":{"rendered":"https:\/\/www.neo-messtechnik.com\/?p=8268"},"modified":"2025-10-07T10:39:16","modified_gmt":"2025-10-07T08:39:16","slug":"dc-components-in-ac-grids","status":"publish","type":"post","link":"http:\/\/www.neo-messtechnik.com\/de\/dc-components-in-ac-grids","title":{"rendered":"DC-Komponenten in AC Netzen"},"content":{"rendered":"<p>In den letzten Jahren wurden Power Quality Messungen in der Industrie und in Verteil- und Transportnetzen immer \u00f6fter durchgef\u00fchrt. Bei diesen Messungen waren die klassischen Kennwerte wie Spannungseinbr\u00fcche, Spannungstransienten und Oberschwingungen im Fokus. Maximalwerte liefern die Normen zur Qualit\u00e4t von Verteilnetzen.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>EN 50160<\/li><li>IEEE 519<\/li><li>Richtlinie G5\/4<\/li><li>D-A-CH-CZ - Technische Regeln zur Beurteilung von Netzr\u00fcckwirkungen<\/li><\/ul>\n\n\n\n<p>Dar\u00fcber hinaus kann die Kompatibilit\u00e4t zwischen Verteilnetz und Produkten gem\u00e4\u00df den Normen IEC 61000-2-2 f\u00fcr \u00f6ffentliche Niederspannungsnetze und IEC 61000-2-4 f\u00fcr Niederspannungs- und Mittelspannungs-Industrieanlagen bewertet werden. In diesen Normen wurde aber stets der Power Quality Parameter DC-Offset nicht mit angef\u00fchrt.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Inhaltsverzeichnis<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69fe5132f0c2a\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #000000;color:#000000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #000000;color:#000000\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69fe5132f0c2a\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/www.neo-messtechnik.com\/de\/dc-components-in-ac-grids\/#DC_Limits_in_Standardization\" >DC-Grenzen in der Normung<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/www.neo-messtechnik.com\/de\/dc-components-in-ac-grids\/#DC_Sources_of_an_Inverter\" >DC-Quellen eines Umrichters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/www.neo-messtechnik.com\/de\/dc-components-in-ac-grids\/#Measurement_system\" >Messsystem<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/www.neo-messtechnik.com\/de\/dc-components-in-ac-grids\/#Conclusion\" >Fazit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/www.neo-messtechnik.com\/de\/dc-components-in-ac-grids\/#Wrapping_up\" >Zum Abschluss<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"DC_Limits_in_Standardization\"><\/span>DC-Grenzen in der Normung<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>In Deutschland ist der DC-Anteil in der Technischen Anlagenrichtlinie (TAR) Niederspannung seit 2019 unter Punkt 5.4.4.9 Einspeisung von Gleichstr\u00f6men in das Niederspannungsnetz zu finden. Hier hei\u00dft konkret:\nEin Umrichter darf nicht mehr als 0,5 % seines Bemessungsstromes oder maximal 20 mA (der h\u00f6here Wert ist zu w\u00e4hlen) als Gleichstrom einspeisen.<\/p>\n\n\n\n<p>Anmerkung 1: Die Messung von Gleichstr\u00f6men erfolgt auf Basis der DIN EN 61000-4-7 (VDE 0847-4-7) \u00fcber 10 Grundschwingungsperioden<\/p>\n\n\n\n<p>Anmerkung 2: Gleichstr\u00f6me k\u00f6nnen zu Korrosionssch\u00e4den an Kabeln und Sch\u00e4den an anderen Betriebsmitteln sowie zur S\u00e4ttigung von Transformatoren und anderen Induktivit\u00e4ten f\u00fchren.<\/p>\n\n\n\n<p>Im Normungstext werden explizit Umrichter als unerw\u00fcnschte DC-Quellen aufgef\u00fchrt. Maximalwerte f\u00fcr die DC-Komponente finden sich ebenfalls in anderen L\u00e4ndern. Drei Beispiele sind in der folgenden Tabelle aufgelistet.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Land<\/th><th>Standard<\/th><th>Grenzwert<\/th><\/tr><\/thead><tbody><tr><td>Australien<\/td><td>AS4777.2<\/td><td>5 mA oder 0,5 % des Nennausgangstroms<\/td><\/tr><tr><td>USA<\/td><td>IEEE Standard 1547-2018<\/td><td>0,5 % des Nennausgangstroms<\/td><\/tr><tr><td>Italien<\/td><td>CEI 0-21<\/td><td>0,5 % des Nennausgangstroms<\/td><\/tr><\/tbody><\/table><figcaption>Tabelle 1: DC-Grenzwerte in nationalen Standards<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"DC_Sources_of_an_Inverter\"><\/span>DC-Quellen eines Umrichters<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Die potenziellen DC-Quellen in Umrichtern sind sehr vielschichtig, wie die folgende Abbildung eines Wechselrichtersystems verdeutlicht.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"619\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/DC-Quellen-Umrichter.png\" alt=\"\" class=\"wp-image-8250\" srcset=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/DC-Quellen-Umrichter.png 867w, https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/DC-Quellen-Umrichter-300x179.png 300w, https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/DC-Quellen-Umrichter-768x457.png 768w, https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/DC-Quellen-Umrichter-18x12.png 18w, https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/DC-Quellen-Umrichter-460x275.png 460w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Measurement_system\"><\/span>Messsystem<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>F\u00fcr die anspruchsvolle Messung des kleinen DC-Anteils sollte das verwendete PQ-Ger\u00e4t ein sehr gutes Signal-Rausch-Verh\u00e4ltnis aufweisen, ansonsten gehen kleinere Pegel unter- oder oberhalb der Nennfrequenz im Rauschen unter.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"384\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/Signal-Rausch-Verhaltnis.png\" alt=\"\" class=\"wp-image-8252\" srcset=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/Signal-Rausch-Verhaltnis.png 727w, https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/Signal-Rausch-Verhaltnis-300x146.png 300w, https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/Signal-Rausch-Verhaltnis-18x9.png 18w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Mit dem Power Quality Analysator PQA8000H von Neo Messtechnik ist der Anschluss von Nullflusswandlern m\u00f6glich. Neben einem sehr guten Signal-Rausch-Verh\u00e4ltnis k\u00f6nnen auch die Frequenzparameter der FFT-Analyse frei gew\u00e4hlt werden.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"355\" height=\"276\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/Danisense-fluxgate.jpg\" alt=\"\" class=\"wp-image-8256\" srcset=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/Danisense-fluxgate.jpg 355w, https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/Danisense-fluxgate-300x233.jpg 300w, https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2023\/07\/Danisense-fluxgate-15x12.jpg 15w\" sizes=\"auto, (max-width: 355px) 100vw, 355px\" \/><figcaption>PQA8000H und Danisense Nullflusswandler<\/figcaption><\/figure><\/div>\n\n\n\n<p>Die normativ festgelegte Gruppierung gem\u00e4\u00df der IEC 61000-4-7 ist gerade im niederfrequenten Bereich f\u00fcr weitergehende Analysen oftmals zu grob gefasst. Aus diesem Grund kann der Analysator auch im Hochspannungsnetz eingesetzt werden, um geomagnetisch induzierte Quasi-Gleichstr\u00f6me im Bereich von 0 bis 1 Hz zu detektieren.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Fazit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Die Umrichtertechnologie bei erneuerbaren Energien ist nicht nur eine potenzielle Quelle von Oberschwingungen. In den letzten Jahren mehren sich Untersuchungsberichte, dass auch in vielen F\u00e4llen eine DC-Einspeisung erfolgt. Neben Umrichtern k\u00f6nnen auch nicht-lineare Lasten einen DC-Anteil generieren.  Induktive Betriebsmittel wie Motoren und Transformatoren sind aktuell f\u00fcr diese Belastungen nicht ausgelegt. Trotz einiger Bem\u00fchungen seitens der Hersteller von Umrichtern den DC-Anteil zu minimieren, wird bei Power Quality-Messungen im Niederspannungsnetz bei der Verwendung von AC\/DC-Sensoren immer \u00f6fter auch ein nicht zu vernachl\u00e4ssigender DC-Anteil detektiert.<br><br>Lesen Sie den vollst\u00e4ndigen Artikel im PSD Europe Magazin vom September 2023 (beginnend auf Seite 41).<br><a href=\"https:\/\/online.flippingbook.com\/view\/910204442\/42-43\/\">powersystemsdesign.com\/print-archives-emb\/588<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wrapping_up\"><\/span>Zum Abschluss<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Wo finde ich weitere Informationen?<\/p>\n\n\n\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items_2a06d5-5b kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><li class=\"kt-svg-icon-list-style-default kt-svg-icon-list-item-wrap kt-svg-icon-list-item-0\"><div style=\"display:inline-flex;justify-content:center;align-items:center;color:#485156\" class=\"kt-svg-icon-list-single kt-svg-icon-list-single-fe_checkCircle\"><svg style=\"display:inline-block;vertical-align:middle\" viewbox=\"0 0 24 24\" height=\"20\" width=\"20\" fill=\"none\" stroke=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"><\/path><polyline points=\"22 4 12 14.01 9 11.01\"><\/polyline><\/svg><\/div><span class=\"kt-svg-icon-list-text\">Klicken Sie einfach auf den Link und <strong><a href=\"https:\/\/www.neo-messtechnik.com\/de\/pqa8000\/\">besuchen Sie unsere Produktseite<\/a><\/strong><\/span><\/li><li class=\"kt-svg-icon-list-style-default kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1\"><div style=\"display:inline-flex;justify-content:center;align-items:center;color:#485156\" class=\"kt-svg-icon-list-single kt-svg-icon-list-single-fe_checkCircle\"><svg style=\"display:inline-block;vertical-align:middle\" viewbox=\"0 0 24 24\" height=\"20\" width=\"20\" fill=\"none\" stroke=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"><\/path><polyline points=\"22 4 12 14.01 9 11.01\"><\/polyline><\/svg><\/div><span class=\"kt-svg-icon-list-text\">Fordern Sie online eine <strong>Produktvorstellung an<\/strong><\/span><\/li><li class=\"kt-svg-icon-list-style-default kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2\"><div style=\"display:inline-flex;justify-content:center;align-items:center;color:#485156\" class=\"kt-svg-icon-list-single kt-svg-icon-list-single-fe_checkCircle\"><svg style=\"display:inline-block;vertical-align:middle\" viewbox=\"0 0 24 24\" height=\"20\" width=\"20\" fill=\"none\" stroke=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"><\/path><polyline points=\"22 4 12 14.01 9 11.01\"><\/polyline><\/svg><\/div><span class=\"kt-svg-icon-list-text\">Wir sind per <a rel=\"noreferrer noopener\" href=\"https:\/\/www.neo-messtechnik.com\/de\/ueber-uns\/\" target=\"_blank\">Telefon<\/a> oder E-Mail f\u00fcr Sie erreichbar. 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During these measurements, the focus has been on classic parameters such as voltage sags, voltage transients, and harmonics. Maximum values are provided by standards for the quality of distribution networks, including: EN 50160IEEE 519Directive [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8250,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[50,1],"tags":[],"class_list":["post-8268","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-and-trends","category-pq-essentials"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DC Components in AC Grids - NEO Messtechnik<\/title>\n<meta name=\"description\" content=\"Discover DC components&#039; impact in AC networks, power quality measurements, and standard limits - explore effects on network stability.\" \/>\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.neo-messtechnik.com\/de\/dc-components-in-ac-grids\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DC Components in AC Grids - NEO Messtechnik\" \/>\n<meta property=\"og:description\" content=\"Discover DC components&#039; 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