Hosting capacity in medium-voltage grids
Higher integration potential for feeders and loads in the medium-voltage grid as well as in the subordinate low-voltage grids
Voltage Regulating Distribution Transformers (VRDTs) can also be used with a focus on the medium-voltage network. A selective use counteracts local voltage maintenance problems, e.g. due to large fluctuating feeders or industrial loads. In addition, there is a wider usable voltage band in the respective subordinate distribution grids. A line-by-line application from a certain distance from the transformer station is suitable, among other things, at the end of stub lines or long network spurs. Finally, bundled or area-wide use extends the usable voltage band in the medium-voltage range as well.
In addition to avoiding voltage band violations, this results in greater freedom for connecting renewables or, on the other hand, for serving additional loads such as those caused by electromobility.
Voltage Regulating Distribution Transformers (VRDTs) thus avoid or delay large-scale network reinforcement measures. The ECOTAP® VPD® on-load tap-changer is the solution for all operators who want to make the integration of feeders and loads more economical. Installed in transformers of different power classes (manufacturer-independent up to approx. 36kV as well as 8,000kVA), it is the standard for all network types. Designed for 500,000 switching operations, it is maintenance-free over the entire life of the distribution transformer. Voltage regulation is possible autonomously via an integrated algorithm or externally via SCADA; in addition, it can be controlled depending on the direction of the power flow.
Conventional transformers also pass on voltage changes from the medium-voltage grid with a constant transformation ratio. With VRDT, the transformation ratio is adjusted automatically and without interruption. This decouples the voltage levels of the medium and low-voltage grid and the voltage at the consumer can always be kept constant.
Figure: Functional principle of the local network transformer with on-load tap-changer
Your advantages:
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Higher integration potential for feeders and loads in the medium-voltage grid as well as in the subordinate low-voltage grids
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Avoidance or delay of large-scale grid reinforcement measures in the medium-voltage grid
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No other equipment in the network. No change to footprint compared with conventional transformers in almost all power rating classes
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Receiving valuable additional information through digital connection while at the same time being able to actively influence what happens on the network
Worldwide deliveries
Transformer Manufacturers
On-Load Tap-Changers
Operators
