Datawatt supplies Distribution automation (DA) stations
With remote control, power failures can be solved more quickly. Previously, in the event of a power failure, a technician was sent out to the transformer MV stations in the affected area to find the problem. Moreover, in the case of failures many households are affected, while the problem is only at one or two MV-transformer stations.
DA-stations make it possible to remotely monitor and control the MV distribution network. DA- stations are used for the automation, data communication and auxiliary voltage of the MV (medium voltage) distribution energy network.
G. Geist, Senior Asset Management Advisor at Coteq Netbeheer explains: “we apply DA-stations at strategic locations, to tell us at distance where the short circuit is and it makes remote control possible to switch in the distribution network”. As a result, the technician is faster at the location and the power outage is solved quicker. This means that connections suffer less from the power failure because the faults are solved more quickly.
Network operators are faced with the challenge to make the medium voltage (MV) network suitable for the energy transition. This represents the transition from fossil fuels to sustainable or renewable energy, such as sun, wind or biogas. Because of this transition there are more and more fluctuations in the grid and the quality of the supplied electricity and of the installation and equipment becomes increasingly important. That is why it is important to make the distribution network smart
The so-called smart grid distribution network makes remote monitoring and control possible. Smart grids help to optimize the maintenance and management of the energy distribution network. So the network operator stays in control on the stability and reliability of the network.
In total approximately twenty district stations will be upgraded for distribution automation and in the future, DA-lite stations will be available at all major switching points in the network. A MV-station is an important hub in the distribution network and accommodates transformers to convert 10 kV to a low voltage (400/230 V) for the supply of energy to households and companies.
DA-boxes consists of sensors in the network connected to the Datawatt telemetry unit. The sensors indicate malfunctions and send this data to the Datawatt Remote Terminal Unit (RTU). The RTU processes the data and takes care of the telemetry connection with the central scada system. Reliable grid data is necessary for a safe, affordable and sustainable implementation of grid management.
The data relates to basic functions such as the detection of short-circuit currents, earth leakage currents, remote configurations, process information and time synchronization. In co-operation with Coteq a standard unit is developed, for both large and medium transformer stations. The cabinet is EMC-proof and built according to the NEN1010 requirements.
Datawatt also delivered the scada system, that provides for a number of “mimics” made in close consultation with Coteq. The solution ensures reliable transmission of all measurements and data to the central scada (EMS) Energy Management System.
Security of supply
In case of a cyber security-related calamity, the distribution network can be separated from the scada system and continue to work autonomously. The security of supply is therefore guaranteed. Reliable data is necessary for a safe, affordable and sustainable network. The data is used for optimizing maintenance, finding short circuits and earth leakage and for management purposes such as a replacement policy. Finally, the data is also used to make accurate investment decisions to make the energy transition possible..
A proper functioning network is of vital importance for the grid operator. The integration of the system is important to ensure the correct functioning of the equipment. Security, reliability, maintenance and service are important aspects, as well as the integration with the central scada system, the design of the configuration and the installation.
We deliver high level solutions, so all of these aspects are met. The solution not only provides remote management but also supports and optimizes network maintenance and management and achievs significant cost savings.
Coteq Netbeheer will continue to invest in smart grids and remote control. Geist: “The most important reasons for investing in DA-stations are that we want less off time in the power supply for our customers and we want to be ready for the energy transition. The system is developed in collaboration with Cogas Duurzaam, Cogas Infra, Datawatt and Eaton. ”