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Customer application

Clever Solution for the Power Grid vs Lightening

Maintain the voltage! That is the highest priority for the lightning protection expert DEHN, even with significant load flow fluctuations and lightning strikes. That’s why WAGO relies on DEHN components for equipping location network stations with control technology. The benefit for customers: perfectly tailored solutions, as well as increased efficiency and reliability – both technical and financial.

Dark clouds are gathering on the horizon; a quiet of rumbling of thunder can be heard in the distance. Then the first lightning strikes flicker in the sky – and suddenly the storm erupts. Several hundred thousand thunderstorms a year occur in Germany, with up to two million lightning strikes.

Some of them reach currents over 100,000 amperes, or even higher. The voltage often reaches of millions of volts or more. Without sufficient lightning and overvoltage protection, electrical devices, systems and equipment can sustain significant damage even during minor storms.

The Energy Transition Increases the Need for Protection

Distribution system operators have not had to worry about their over 600,000 local network stations around Germany, since there are simply no electronics installed there that could be endangered by a lightning strike. The energy transition is now changing that: The volatile feed-in to the distribution grids is increasing, and the fluctuations of the load flows are becoming ever greater, as are the associated voltage fluctuations.

It is crucial to upgrade location network stations: with “intelligent” electronic components such as communication and telecontrol technology, controllable local network transformers and longitudinal voltage regulators or remote controllable load break switches and circuit breakers on the medium voltage level. Tools like these help the network operators keep the power grid stable.

The crux of the matter is that the more electro-technical equipment and devices that are installed in the local network stations, and the more complex and interconnected the local power supply becomes, the greater the risk is of damage due to lightning. As the interface between the medium and low voltage network, the local network stations are especially at risk in this regard.

Lightning striking the equipment or in its immediate vicinity is not the only danger; the interference pulses can also be transferred through the incoming supply lines. Depending on soil conditions and other factors, the hazard radius can extend up to one and a quarter miles (two kilometers) around where the lightning strikes.