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Customer application 31 August 2020

Safe Pressure Regulation

People tend to think that at this point, the energy transition is limited to just the electrical sector. But DREWAG NETZ GmbH is going a step further and modernizing its gas distribution stations to bring intelligence to its gas division. For this process, the company relies on automation solutions from WAGO.

When smart grids are discussed, the focus is usually on the electrical sector, as is the case for the entire public discourse about the energy transition in general. In contrast, the gas and district heating sectors live in the shadows, at least as far as public perception is concerned. Yet adding intelligence is no less lucrative here. Recently, energy suppliers like DREWAG NETZ from Saxony have employed smart technology at the regional level in gas distribution systems. The I/O technology from WAGO’s 750 Series is used in an increasing number of gas pressure regulating stations in Dresden.

The Benefits of WAGO for You:

Ex i modules within the modular I/O-SYSTEM 750 have been designed specifically for hazardous areas.
880 ETHERNET telecontrollers support diverse ETHERNET protocols, such as IEC 60870, IEC 61850 and MODBUS (TCP, UDP, RTU)
Reliable, Simple and Economical

Data Transmission in the Connectionless Network

Tino Tietze, who oversees process technology and IT project organization, is responsible for the technology in the gas and district heating sectors. Under his leadership, DREWAG NETZ GmbH began expanding a proprietary process IP network based on MPLS (Multiprotocol Label Switching) in 2007. MPLS enables connection-oriented data transmission in an otherwise connectionless network. While the gas distribution is connectionless – i.e. there is no transmission in the opposite direction – a message connection between transmitter and receiver can be established in both directions for data exchange. This forms the foundation for a distributed system that has many advantages: Controlling and accessing all data of the connected system is possible from any linked in location. This increases fail safety. The entire system can be more easily scaled, so that output can be adjusted to demand at all times. Additional systems can subsequently be more easily connected, which could become even more important with greater decentralization.

Increased Functionality through Process Control Systems

Against this background, DREWAG NETZ GmbH began introducing a process control system throughout all pipe media in all control and dispatching centers starting in 2011. The pipe media include gas, water and district heat, as distinguished from electricity. The project was completed in 2016 and enabled an entire series of additional functionalities. For example, objects from different data recording systems can be represented and updated in a single image. Event protocols from all systems can be displayed in one window. System images can be retrieved from anywhere; alarms from all systems can be displayed and acknowledged. In this context, reliable communication is consistently established using the IEC 60870 telecontrol protocol.