This model extends the network with alpha-beta loads model, it could also extend the network with PQ loads model.
This model implements the Nordic 32 test system presented in the IEEE Technical Report "Test Systems for Voltage Stability Analysis and Security Assessment" from August, 2015. It is a modified version of the so-called Nordic32 test system, which was first proposed by K. Walve.
The system consists of 74 buses, 32 at transmission, 22 at distribution and 20 at generator level. Synchronous generators and distribution transformers are regulated. The initial values have been taken from the report.
Its main purpose is to simulate and study long-term voltage instabilities.