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Added Value for Network Operators

No network monitoring without transparency, no planning without monitoring, no network optimization without planning – to automatically compensate for bottlenecks in the low voltage network, distribution network operators need to keep an eye on the networks. The WAGO solution makes network visualization and control on the basis of online measurements easier.

Developing technologies and processes to reduce the strain on networks is a key goal of the energy industry. The latest developments include generation and load management via so-called wide-range control through the medium and low voltage network distribution networks. In the process, the medium voltages in the substations are regulated to keep the voltage within the allowed rage throughout the entire lower-level grid. This allows the maximum amount of renewable energy to be fed in and the voltage range to be maintained simultaneously at all points.

WAGO is among the forces driving this innovative type of network optimization. Substations with WAGO control and measurement technology are an essential component of wide-range control. In this approach, WAGO PFC200 Controllers function as a central data node in the stations: They collect the current values recorded by three-phase power measurement modules in the low voltage network and transfer them to the office network via a secure VPN connection, and if necessary, e.g., if a limit is exceeded, to the network control center via a second VPN connection. This allows the network planning employees to improve their ability to keep an eye on the network through sustainable progress in telecontrol monitoring, to plan proactively and to react quickly in the event of faults.

The Network Becomes Transparent

The network station controller transfers voltage values to an additional WAGO controller in the 110 V substation in parallel. Special, easy-to-operate software calculates the current state of the low voltage network on the basis of the measured values from the distant endpoints. The level control in the substations is automatically optimized on the basis of these calculations, reducing the burden on the network management in critical situations. Initial experience shows that the wide-range control can reduce the fluctuations in the network by almost 30 percent.

“Intelligent local network stations facilitate measurement, control, regulation and remote control, and function semi-autonomously. The next step is now real network control in the low and medium voltage range. Online measurement is not new, but we now use it in a timely fashion to obtain knowledge that has many benefits for network operators,” says WAGO network expert Daniel Wiese. The most important benefit is that wide-range control can help companies reduce high network expansion costs, since, on the one hand, it allows the capacity of existing lines to be fully utilized, and on the other, the network information allows investments to be planned in a more targeted fashion. “Online measurement in the low and medium voltage ranges provides transparency in the network. This allows the network operators to easily identify where more or less primary technology is necessary,” says Wiese.