This paper describes the effectiveness of using dynamic voltage restorer (DVR) in order to mitigate voltage sags and swells in low voltage distribution systems. A dynamic voltage restorer based on the dqo algorithm is discussed. The proposed control scheme is very effective to detect any disturbance in low voltage distribution systems. Simulation results using Matlab/Simulink are presented to v...

Minimization of line losses and the improvement of power quality in distribution system are the most challenging problems, particularly when it is not economic to upgrade the entire feeder systems. This paper presents a new method to achieve the line loss minimum condition and improve power quality in radial and loop distribution system by using Unified Power Flow Controllers (UPFC), one of the...

The operation of a distribution system in the presence of distributed generation systems has someadvantages and challenges. Optimal sizing and siting of DG systems has economic, technical, andenvironmental benefits in distribution systems. Improper selection of DG systems can reduce theseadvantages or even result in deterioration in the normal operation of the distribution system. DGallocation ...

Recent advances in power electronic technology have seen the development of a range of converter based power compensation systems which have the potential to improve supply quality and increase line utilisation in weak distribution networks at relatively low cost. However, the interaction of these devices with the supply network has not been well documented. In this paper we investigate the ste...

This paper proposes a half-bridge voltage balancer with a new controller for bipolar DC distribution systems. The proposed control scheme consists of two cascaded Proportional Integral (PI) controls rather than one PI control for balancing the pole voltage. In order to confirm the excellence of voltage balancing performance, a typical bipolar DC distribution system including a half-bridge volta...

The regulation of the grid voltage within operational limits becomes increasingly challenging as residential photovoltaic (PV) adoption rises. Therefore, this study proposes a method for efficient planning multiple community battery energy storage systems (BESS) in low distribution embedded with high rooftop PV units. A bi-level optimization based on Neural Network Optimization Algorithm is dev...

Costs of power quality disturbances (interruptions, voltage sags, harmonics, surges etc.) are very significant and have the highest impact on industry. In order to minimize those costs, it is necessary to analyze the electrical system and then try to determine possible future problems. Only after that, it is possible to improve the system in the right way. HEP d.d. – (Croatian electricity compa...