Hybrid AC/DC microgrids facilitate the procedure of DC power connection into the conventional AC power system by developing the distributed generations (DGs) technologies. The conversion processes between AC and DC electrical powers are more convenient by hybrid systems. In this paper, an energy management system (EMS) for a hybrid microgrid network is proposed due to the optimal utilization of...

Increasing the short circuit current due to the penetration of distributed generations (DGs) in various voltage levels and meshed topology is a basic problem in power systems. Using fault current limiter (FCL) is an efficient approach to mitigate the exceeded short circuit levels. In this paper, a new approach is presented for multiple FCLs locating to decrease short circuit levels in meshed ne...

With the rapid development of wind turbine, photovoltaic and battery technologies, renewable energy resources such as wind and solar become the most common distributed generations (DG) that are being integrated into microgrids. One key impediment is to determine the sizes and placements of DGs within which the microgrid can achieve its maximum potential benefits. The objective of the paper is t...

This paper proposes an Imperialist Competitive Algorithm (ICA) for optimal multiple distributed generations (DGs) placement and sizing in a distribution system. The objective is to minimize the total real power losses and improve the voltage profile within real and reactive power generation and voltage limits. Three types of DG are considered and the ICA is used to find the better sizes and loc...

With the rapid development of integrated energy system, large-scale and high-permeability access distributed generations (DGs) is making distribution networks develop into active (ADNs). The increased complexity ADNs also increases vulnerabilities for cyberattacks. It a new challenge how to evaluate situation an ADN so as support decision-making grid control policies in condition cyberattacks p...

In this study, the forecasting-aided state estimation (FASE) problem for active distribution system (ADS) with distributed generations (DGs) is investigated, considering constraint of data transmission. First all, model ADS DGs established, which expands scope from power network to DGs. Moreover, in order improve efficiency transmission under limited communication bandwidth, a component-based e...

When a distribution network consisting of Distributed Generations (DGs) is disconnected from upstream network, the system may be exposed to severe power imbalance. In order to prevent the damage of power plants, frequency relays operate and remove DGs from the network. In contrast to traditional methods, the main objective in new methods is to keep DG units in service in the islanded distributi...

In general, a temporary overvoltage (TOV) on the healthy phases occurs because of neutral-shift phenomenon during single line-to-ground (SLG) fault. The TOV can destroy insulation electric devices and cause damage to other equipment customer loads in just few cycles. practice, be affected by numerous factors: sequence reactance ratio interconnection transformer, load DG, distance More important...

The satisfaction of electricity customers and environmental constraints imposed have made the trend towards renewable energies making them more essential due to their advantages as reducing power losses ameliorating system’s voltage profiles reliability. This article addresses optimal location size multiple distributed generations (DGs) based on solar photovoltaic panels (PV) connected electric...

Distributed Generation (DG) is increasing day by day and it has become an important part of electrical generation across the world. Due to the growth of DG penetration, the nature of distribution network is altered from a passive network to an active network. The penetration of DG is beneficial if it is optimally placed. Various models of DGs are developed for optimal placement of DGs, and seve...