Voltage Unbalance (VU) is one of the most common power quality problems in industrial electrical systems and it a subject systematic study. This problem affects operation efficiency Induction Motors (IMs), which are loads that demand more energy sector with around 68%. The Factor (VUF), defined by international IEC standard, main factor used to characterize this problem. article aims present th...

Unsymmetrical loads and PV infeed limits the hosting capacity of LV feeders due to a faster exceeding of the over-voltage limit. While current connection rules require from inverters to control the voltage, they do not address at all the behaviour of three-phase inverters under unbalanced conditions. This paper investigates the impact of different control options on the network performance (vol...

Over the last decade, the battery energy storage system (BESS) has become one of the important components in smart grid for enhancing power system performance and reliability. This paper presents a strategy to shave the peak demand and mitigate the voltage unbalance of the electrical networks using a BESS. The BESS is developed to reduce the peak demand and consequently the electricity bill of ...

During the voltage unbalance, the resulting adverse effects on equipments such as induction motors and power electronic converters and drives on ASDs have been described. It has been observed that during unsymmetrical fault, the input rectifier slips into the single phase operation and draw heavy currents which may actuate the overload protection and trip the ASDs. The application of supercapac...

This paper presents a dual active bridge DC/DC converter used as an AC current compensator in hybrid energy storage application. The the DC link appears when three-phase, four-wire inverter operates with unbalanced output currents—for example, trying to compensate for grid voltage unbalance. has adverse effects on operation of electrochemical storage, and it should be compensated. To achieve th...

The approaches to the control of hybrid VAR compensator are considered. A is a passive and active connected in series. part represented by thyristor-switched capacitor bank. power implemented on basis an autonomous voltage inverter, through transformer series with part. Most reactive compensated means compensator’s combines advantages (low price, reliability) compensators (possibility smooth po...

Three-phase unbalance is an important power quality issue that can cause many negative effects to the power system. Effective mitigation and management of voltage unbalance will benefit from the knowledge of how the unbalanced sources contribute to the voltage asymmetry at the point of evaluation (POE). In this paper, a method is proposed to assess the overall unbalance contribution of the mult...

Voltage unbalance (VU) in residential distribution networks (RDNs) is mainly caused by load unbalance in three phases, resulting from network configuration and load-variations. The increasing penetration of distributed generation devices, such as small wind turbines (SWTs), and their uneven distribution over the three phases have introduced difficulties in evaluating possible VU. This paper aim...

With the increase of penetration rate renewable energy power generation in system, grid gradually tends to be weak. Under scenario nonlinear load connecting weak grid, grid-side voltage will produce unbalance, distortion and frequency deviation due influence large internal impedance, insufficient inertia, three-phase current unbalance harmonics grid. The operation active filters (APF) under abo...