{"id":15771,"date":"2024-08-07T11:09:47","date_gmt":"2024-08-07T09:09:47","guid":{"rendered":"https:\/\/cubeconcepts.de\/?p=15771"},"modified":"2026-05-22T10:25:37","modified_gmt":"2026-05-22T08:25:37","slug":"reactive-current-for-pv-systems","status":"publish","type":"post","link":"https:\/\/cubeconcepts.de\/en\/blindstrom-bei-pv-anlagen\/","title":{"rendered":"Reactive current for PV systems"},"content":{"rendered":"

Reactive current<\/strong> arises with PV systems<\/strong>as soon as the inverters convert the direct current from the solar modules into alternating current. As reactive currents only form in AC or three-phase grids, this phenomenon does not occur in the cables that connect the modules to each other and the string cables that connect the strings to the inverter. The DC side Wiring of PV modules<\/a> ist also von Blindstrom, der auch als reaktiver Strom bezeichnet wird, nicht betroffen. Auch die Blindleistung<\/a> als daraus resultierende Leistungsart tritt vor allem bei Wechselstrom auf. <\/p>\n\n\n\n

Reactive current briefly explained<\/h2>\n\n\n\n

Reactive current is a term used in electrical engineering and describes the part of the electrical current that does not perform any useful work in an alternating current system or is not converted by a consumer. According to the inverter of a PV system, there are therefore two types of current: Active current<\/strong>the current actually used, which performs work, and reactive current, which performs no work but is necessary to maintain the electric and magnetic field<\/strong> and maintain it.<\/p>\n\n\n\n

It is caused by inductive and capacitive loads, such as those found in coils (inductances) and capacitors (capacitances). It is used due to the constant Field structure of the alternating current<\/strong>which oscillates at a frequency of 50 Hz in Europe. If there are phase shifts between current and voltage or due to a high number of installed coils and capacitors, the proportion of reactive current increases.<\/p>\n\n\n\n

PV systems must provide reactive current<\/h2>\n\n\n\n

Although reactive current basically represents an additional load for the overall system, it is not a problem for PV systems that are connected to the public grid, obligatory<\/strong>. Such systems must be located at the Mains support<\/strong> through a Static voltage maintenance<\/strong> or by a so-called Provision of reactive power<\/strong> participate. The decisive factors here are Inverter<\/a>.<\/p>\n\n\n\n

This is regulated for PV systems from 135 kW by VDE-AR-N 4105 from November 2018. The application rule states that the respective grid operator can provide the system operator with four different options for providing reactive power.<\/p>\n\n\n\n