Data Collection How Retrofit Facilitates the Digitization of the Last Mile

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EMH Energie-Messtechnik Hamburg GmbH

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Digitizing data collection at key nodes of the distribution networks is an essential prerequisite for creating a future-proof power supply. The retrofit concept offered by EMH Energie-Messtechnik GmbH enables the modernization of practically any system in a relatively simple way.

In order to continuously maintain a good overview of the load of low-voltage networks, a large number of local network stations and cable distribution cabinets should be equipped with the necessary technology for automatic recording and transmission of the corresponding information. Network operators thus face an enormous challenge: At the low-voltage level, the distribution networks in Germany alone comprise around 650,000 local network stations and more than one million cable distribution cabinets. The design and operating time of the facilities are anything but homogeneous, and different constructions from several manufacturers are often used in the same local network.

Individual Solutions Indispensable

For the necessity of digitization and implementation of appropriate monitoring technologies, this means: In practice, it is hardly feasible to modernize existing facilities according to a uniform concept. Even if a large part of the hardware installed in the respective local network is largely identical and can be processed according to standardized procedures, individualized solutions are required for all other locations involved in the modernization. Additionally, the points eligible for a retrofit cannot be arbitrarily determined. The decision on which locations the digitization of local network stations or cable distribution cabinets is sensible for is only made after an in-depth analysis of location-specific load data.

Modular Retrofit Concept

In order for network operators to realistically plan and calculate the effort required for modernization, the retrofit concept developed by EMH Energie-Messtechnik GmbH in cooperation with Be-Energy SG GmbH relies on modularity and individually tailored hardware and software components for each application. The basis is the Smart Grid Interface Module SGIM offered by EMH, a hardware platform that can be equipped with different functional modules according to customer requirements. Standard-designed for uninterrupted installation in a 7.28 inches busbar system, the system can alternatively be mounted on a wall or a door depending on local conditions.

The data provided by the SGIM enables not only a simple load statement but also an accurate representation of the current network situation, including the load caused by photovoltaic systems or e-charging infrastructure with harmonic distortions. Thanks to an open and scalable software structure, the SGIM can also be seamlessly integrated into a wide range of IT infrastructures and software environments, ensuring that facilities digitized according to EMH’s retrofit concept are early on prepared for the possibility of later migration from the remote control world to the IoT world.

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