Abstract:
The integration of renewable energy generators in distribution grids has increased the
complexity of the voltage control problem. Reactive power control (RPC) algorithms based on
sensitivity analysis have been proposed in the literature for the management of the voltage problem.
Sensitivity methods are computationally complex for practical real-time analysis and this has led to
use of de-coupled and other simplified load flow models. However, algorithms based on decoupled
models have been shown to be inefficient for analysis of distribution systems with low X/R ratio. This
paper uses a simplified line modelling approach recently proposed in the literature to facilitate the
development of computationally simple distributed, non-decoupled, load flow equations that
completely capture the characteristics of the radial distribution feeder, removing the need to use the
decoupled models. Results show that the simple algorithm based on this new line modelling approach
gives better voltage control performance compared to the decoupled models.
