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Customer application November 25, 2019

Feed-In Management – Compliance and Certification

Getting generation plants onto the grid requires compliance with specifications, directives and laws. Roland Glück has extensive experience with these in the grid area of E.ON subsidiary Bayernwerk Netz GmbH. His company Glück MSR GmbH, from Arnstorf, Germany, was the first to receive the required component certificate per VDE-AR-N 4110 for its power generation plant controller, which is realized with WAGO automation technology.

Roland Glück already began the VDE certification process for his “Smart Multifunction Power Plant Controller” (SMPPC) back in 2017. That makes him a pioneer and the first person in Europe to get the component certificate for power generation plant controllers, which is now mandatory. A brief explanation of the background behind the certificate: Whether for cogeneration, biogas, photovoltaic systems, wind turbines, storage batteries, geothermal energy, hydropower or mixed systems: Since 2019-04-26, the technical connection rules (TCRs) for power generation plants (PGPs) have changed. In this context, VDE-AR-N 4110 requires a component certificate for PGP controllers for all generation plants that will feed into the medium-voltage grid.

Clever Feed-In Management – This is How WAGO Supports You:

WAGO automation forms the basis for the first PGP controllers compliant with VDE-AR-N 4110.
WAGO’s ETHERNET-based controller makes remote maintenance especially easy.
Its technology sends the plant data to the cloud reliably at 15-second intervals.

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No VDE-AR-N 4110 Compliance Means No Medium-Voltage Grid Connection

“On the medium-voltage level, compliance with the VDE-AR-N 4110 technical connection rules (TCRs) is mandatory in order for an operator to even be able to connect their plant to the grid and be allowed to feed generated energy into it,” says Roland Glück, explaining the medium-voltage technical connection rules. Lately, the 32-year-old CEO of Glück MSR GmbH has been noticing that equipment manufacturers, as well as plant operators, planners and designers, are all becoming equally sensitive to the changes in the technical connection rules. However, from his own experience, he knows that the actual implementation is not so simple.

VDE AR-N 4110: Grid Stability Requires Standards

For grid operators, the technical connection rules serve to guarantee grid stability, and thus the reliability of the power supply. In general, more and more generation plants are crowding onto the grid. Whereas the small plants used to be of negligible importance to grid operators when it came to keeping their grids stable, and throttling comparatively small plants was not so costly for them, the situation is now different with the growing number of power generation plants feeding in. When summed together, these power generation plants endanger grid stability, and thus the reliability of the power supply.

“The rules, directives and laws are changing ever more quickly, and are getting stricter too” confirms Roland Glück. “The grid operators are clamoring for reliability.” Especially in the grid area around Arnstorf, “a Mother’s Day with a lot of sunshine is becoming critical for the grid” says Roland Glück, explaining the situation graphically.

Rules and standards are needed – also in order to flesh out the directive of the EU Commission, the European Network Code “Requirements for Generators” (RfG), which came into effect in 2016. The VDE application rule is the national embodiment of these. It requires “expanded capabilities for fault ride-through of short voltage drops as well as provision of reactive power in newly erected power generating plants. These new requirements improve grid stability.”