4-Node Test Feeder with Step Voltage Regulators

•Proposal of a new test feeder: 4-Node Test Feeder with Step Voltage Regulators (SVR).•Proposal of a general model of three phase SVRs suitable for all possible configurations.•Tap position optimization by means of Backward Forward Sweep algorithms for unbalanced power flow.•Results available on line for 80 different study cases with different configuration and loading cases.

This work has two main contributions; First, the development of a general, exact and standardized Step Voltage Regulator model considering all possible configurations and second, the proposal of a 4-Node Test System for testing and evaluation of three-phase Step Voltage Regulator connections. Although the 4-Node Test Feeder for testing three phase transformer configurations is already available in the literature, there is not such model for the inclusion, testing and validation of Step Voltage Regulators in a test feeder. With the work presented in this paper, a new test system will be available to evaluate and benchmark programs or algorithms that attempt to include different configurations of Step Voltage Regulators. The formulation is stated for all three phase Step Voltage Regulators; i.e. wye, close-delta and open-delta connections, both type A and B regulators, in raise or lower positions. Then, all these models are included in a 4-Node Test Feeder to obtain several power flow solutions. All obtained results will be available for power flow software developers on-line.