H5 topology

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H5 topology is the trade name of a solar inverter - circuit topology for keeping high-frequency alternating voltages away from the solar modules in photovoltaic systems. It also increases efficiency . With their help, according to the developer (company SMA), an efficiency z. B. when used in photovoltaic systems of over 98 percent.

function

Arrangement of the switches, whereby S5 & S2 or S5 & S4 switch synchronously and S1 & S3 are active in freewheeling

With the so-called H5 topology, an additional electronic switch S5 is inserted in front of the four-quadrant controller, which turns the usual four into five switches (H5). The currents that flow to earth via the parasitic capacitances of the system during the free-running interval are blocked ("floating") by the additional switch (power semiconductor ). According to the company SMA, this enables efficiency levels of over 98 percent to be achieved.

rating

The parasitic currents due to the asymmetrical network connection can also be avoided with other circuit topologies (see web links). The efficiency specification can hardly be made objectively, since it depends on the specific system.

swell

  1. ↑ Topological approaches for inverters in grid-connected photovoltaic systems. (PDF; 1,647 KB) University of Kassel - Competence Center for Decentralized Electrical Power Supply Technology (KDEE), archived from the original on December 3, 2013 ; Retrieved May 11, 2010 .
  2. ^ Fritz Schimpf, Lars E. Norum: Grid connected Converters for Photovoltaic, State of the Art, Ideas for Improvement of Transformerless Inverters. 2008, accessed on January 14, 2019 .
  3. ↑ Joachim Laschinski, Catrin Nahr: H5 topology enables efficiency of over 98% . In: Fachjournal - trade journal for renewable energies & technical building equipment . tape 2006-2007 , pp. 198–199 ( ihks-fachjournal.de [PDF; 216 kB ; accessed on January 14, 2019]).

Web links