Measure

Why aren't the meters in the devices?

•A meter does not influence the network, or only indirectly through a device. It simply indicates that a measurement is being taken at this point. What exactly is being measured and what reaction this measurement may trigger will only become clear through the control system used.

•The meter in a house may also contain an active component. In this context, we will certainly need to address the topic of smart meters, which can be controlled, at a later stage. However, even here, it is assumed that these elements (despite having an active component) will not fall into the category of devices, as they typically only control the end consumer and do not influence the sub-network.

•The topic of meters/devices will be examined in more detail during the next or subsequent revision of the data models.

The power data model is 'hierarchical'

Why was the VertiGIS data model for electricity defined as 'hierarchical' rather than 'partitioned'?

•Electricity can be transformed both from a higher voltage to a lower voltage, as well as from a lower to a higher voltage level. End consumers are no longer just electricity users, but increasingly also prosumers. Thus, electricity flows not only in one direction. Only a network of the 'hierarchical' type supports bidirectional connection points.

•An asset can be part of different subnetworks: station/transformer circle, branch, network level.

•The technical specialists at Esri also identify the power grid as a 'hierarchical' network. In America, the power grid is structured somewhat differently than in Europe, and 'phase swapping' is practiced. This 'phase swapping' is supported through the 'value propagation' functionality, which, however, was developed only for partitioned networks..