IEC has published the FDIS for ballot until 2012-11-30:
57/1286/FDIS
Part 5 Ed2: Communication requirements for functions and device models
Extensions in Edition 2 of part 5:
- requirements for communication between substation automation systems to utility automation systems;
- including the interfaces for communication between substations (interfaces 2 and 11);
- requirements from communication beyond the boundary of the substation
Note that part 5 does NOT DEFINE FUNCTIONS!! The scope states:
“The description of the functions is not used to standardize the functions, but to identify communication requirements between Intelligent Electronic Devices … Standardizing functions and their implementation is completely outside the scope of this standard.”
There are other parts of IEC 61850 that go beyond the issue of determining the communication requirements: e.g., part IEC 61850-90-7 defines behavior at the electrical coupling point of a PV inverter. Depending on the configuration (input) of the various settings of a specific model the electric output of the inverter has to follow the “FUNCTION” that is described in the Logical Node model!
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