Applications for Power Utilities
The energy sector is changing rapidly: a growing share of renewable sources, increasingly dynamic loads, and the ever-present demand for uninterrupted supply. To meet these challenges, power utilities need full transparency of energy flows in their grids. This is the only way to ensure grid stability, avoid the risk of overloads, and consistently reduce losses.
Determination of network status
Challenge
A reliable assessment of grid conditions is essential for implementing network-oriented control strategies. Grid operators must be able to capture and document the current state of the network and issue control commands within a short timeframe. To justify grid interventions from a technical perspective, detailed, feeder-specific measurement data is indispensable.
Therefore, grid operators must not only equip new secondary substations and distribution cabinets with measurement technology. They must also retrofit or upgrade existing substations. Older substations are often not designed for this: the necessary data connections are not sufficiently available, and there is not always enough space in the local network stations and distributors.
Solution
The UMG 800 provides the network transparency required to implement Section 14a EnWG. With the expansion modules and the use of measurement groups, an operator can monitor up to 32 outputs with just one device. With its slim design and compact modules, the UMG 800 can be perfectly integrated into new and existing systems.
Numerous communication interfaces, whitelisting, custom Modbus address lists, and other features simplify system integration and enable real-time data transmission.
Evaluation
With the Remote Display RD 96, operators can read and analyze UMG 800 data on site. Various configurations are possible via the additional display, which can be either permanently installed or used as a mobile maintenance display. Connection is via USB. Remote maintenance and analysis are also easily possible via the integrated web server.
System Integration
With its 2 sub-units in size and compact 800-CT8-LP modules, the UMG 800 integrates easily into existing secondary substations. A wide variety of interfaces simplify on-site connection, while communication protocols such as OPC UA and Modbus TCP/IP offer easy integration options. Mechanisms such as Modbus whitelisting further increase data security. An integrated memory stores all relevant data in case the connection is interrupted.
Grid Stabilization with UMG 800
Challenge
A regional power utility wanted to improve energy efficiency in its grid and thus optimize energy consumption. Despite modern technology, unexpected peak loads and inefficient consumption patterns led to increased operating costs and grid fluctuations.
Solution
The power utility used the UMG 800 to monitor rasterized and moving average values. This function provided the utility with a precise long-term overview of energy consumption and grid load. The recording of critical 200 ms minimum and maximum values was particularly helpful. These enabled the grid operator to identify peak loads at an early stage and react quickly to potential problems. With this data, the company was able to take targeted measures, avoid outages, and optimize energy use in the grid.
Thanks to the simple integration into existing systems via OPC UA and Modbus/TCP, technicians were able to monitor energy consumption at any time and make informed decisions about grid optimization. By continuously monitoring the average values, the power utility was able to identify inefficient consumption and implement sustainable energy-saving measures.
Grid Stabilization
The recording and storage of rasterized and moving average values reveals trends in energy consumption. At the same time, the meter stores critical 200 ms max/min values, which can be used to identify load peaks at an early stage. Grid operators can then take appropriate action. In addition, the UMG 800 provides 1-minute averages for current and power recordings in order to meet regulatory requirements and to achieve proactive grid stabilization. The high measurement accuracy and real-time data enable rapid intervention in the event of faults.
Further Highlights for Power Utilities
Communication
The UMG 800 offers easy integration into third-party systems. Measured values can be accessed anytime, anywhere via OPC UA and Modbus/TCP as well as the integrated web server. In addition, grid operators can create freely configurable Modbus address lists via the integrated web server. This enables easy data access and individual mapping to existing communication structures.
On-site communication and data analysis are possible via the RD 96 remote display, which can be easily connected via the USB interface. This means that configurations and fault analyses can also be conveniently implemented on site.
The integrated comparators in the energy analyzer reduce data traffic and the associated costs—after all, the device only sends corresponding messages when limit values are exceeded. If communication is interrupted, the data is secure thanks to the generously designed 4 GB memory, ensuring continuous data recording.
Cost effectiveness
Thanks to virtual measurement groups, you can reduce hardware costs and make optimal use of measurement channels. Measurement values for 3- and 4-phase applications can be created and combined—virtually and efficiently, without any additional hardware. The use of virtual parameters allows for a reduction in physical devices.
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