Turning to Renewable Energy Sources (RES) is the most logical politics in securing the modern society from critical changes in earth increasing temperature. However, Distributed Generation (DG) sources could lead to new challenges in electricity network, mainly allocation of DG sources in distribution level of power system will set the existing network under stress of power flow parameters. The...

The increasing demand of electrical power has caused the system network to be in stressed condition which led to transmission loss in the system. Consequently, voltage profile of the system decays accordingly leading to unpredictable voltage instability phenomenon. The issue of loss minimisation has been progressively investigated in the power system environment. Many techniques have been devel...

With the advent of new loads and generation on low voltage grid, fluctuation has increased, especially in active distribution grids with a high penetration distributed resources large deployment electric vehicles. The coordination different technologies emerged as best way for regulation, among others, smart inverters, open soft points or transformers on-load regulation capability. This paper p...

Voltage instability is a major concern in operation of power systems and it is well known that voltage instability and collapse have led to blackout or abnormally low voltages in a significant part of the power system. Consequently, tracking the proximity of the power system to an insecure voltage condition has become an important element of any protection and control scheme. The expected time ...

This paper proposes a stochastic optimal operation method for active distribution networks to improve system resilience. The source–network–load uncertainties are handled with set of typical scenarios, and the post-contingency security level is quantitatively evaluated by distance. formulated problem determines on-load tap-changer tap position, distributed generator (DG) output power, DG power ...

A distribution system was designed and operated by considering unidirectional power flow from a utility source to end-use loads. The large penetrations of distributed generation (DG) into the existing distribution system causes a variety of technical problems, such as frequent tap changing problems of the on-load tap changer (OLTC) transformer, local voltage rise, protection coordination, excee...

Abstract The flexible on-load transformer can be adapted to different application scenarios by adding power electronic converter structures through the use of existing transformers. In this paper, a regulator structure based on floating capacitor multi-level AC/AC is proposed, which compensate input voltage primary side in same direction or opposite direction, combine with tap-changer, and also...