The mapping shown in Figure 1 results in the mapping shown in Figure 2.
Mapping possibilities and requirements
The mapping is possible at several levels in the structure.
- Logical node level (LN to LN)
- Data object level (DO to DO)
- Data attribute level (DA to DA)
Custom logical device name (LDName) can be used for addressing.
When the mapping is performed, there are some requirements that must be fulfilled.
- Used system configuration files must be standard compatible.
- One attribute in the customer model can be mapped only to one attribute in the IED model. However, one attribute in the IED model can be mapped to several attributes in the customer model.
- The versions of the IEC 61850 standard must match.
- Number of data sets must not exceed the maximum number of data sets that the IED supports.
There are also some consequences that must be considered.
- If two DOs in one LN in the customer model are mapped to DOs in different LNs in the IED model, the DOs in the customer model might have inconsistent quality in case of different operational states of the IED functions.
- When several LNs in the customer model are mapped to one function in the IED, the Mod of the function affects all the customer LNs.