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BOGOVIČ, J., MIHALIČ, R.
Flexible Alternating Current Transmission System Devices Compensator for Distribution System
KOMUNALNA ENERGETIKA / POWER ENGINERING, 171
One of the possible solutions for improving voltage conditions in an electric power system (EPS) is applying power electronics based or so called flexible alternating current transmission system (FACTS) devices. However, the appropriate inclusion of a FACTS device into the EPS is not a straightforward procedure. On the contrary, it requires several steps. One of the first steps is the power flow analysis, which requires an appropriate FACTS device modelling.
In the past the models of FACTS devices for Newton-Raphson (NR) power-flow and current-injection calculation methods have been developed. The NR analysis, however, is not always suitable for distribution networks due to convergence problems. This is why new three-phase models of FACTS devices for the forward/backward sweep method are presented in this paper. Their application is demonstrated on an IEEE 34 and 123 bus test systems, in order to clearly present the approach virtues for FACTS modelling in distribution networks with included distributed generation units (DGs).
BOGOVIČ, J., MIHALIČ, R.
MODEL OF STATIC SYNCHRONOUS SERIES COMPENSATOR
KOMUNALNA ENERGETIKA / POWER ENGINERING, 12
This paper presents a model of Static Synchronous Series Compensators (SSSC) for load-flow calculations in a distribution system for the forward-sweep algorithm. The model of SSSC for forward-sweep algorithm is based on current model used in Newton-Raphson load-flow calculations. The model is modified that is used for forward-sweep algorithm, but all known properties are preserved. Since the distribution networks are mainly radial and unequally loaded by phases, a three-phase modeling of SSSC is presented. Models are verified on a test case.
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