This paper presents a genetic algorithm-based method to determine coordinated voltage control in the unbalanced distribution radial system distributed generators. The coordinated voltage control has been done with DGs reactive power control and OLTC operation. The result indicates that involving DGs reactive powers in the voltage control will result in a reduction of number of OLTC operations a...

Distributed generators (DGs) are defined as generators that are connected to a distribution network. The direction of the power flow and short-circuit current in a network could be changed compared with one without DGs. The conventional protective relay scheme does not meet the requirement in this emerging situation. As the number and capacity of DGs in the distribution network increase, the pr...

The present study attempts to deal with two problems: optimal allocation of distribution generations (DGs) and reconfiguration a system satisfy several multiobjectives including smoothing the voltage profile, minimizing cost reliability, balancing amount load on end-user side. These problems are merged into one single optimization problem aforementioned objective functions. type is mixed-intege...

In a quest to solve the multi-objective optimal planning problem using simple parameter-free metaheuristic algorithm, this paper establishes recently proposed student psychology-based optimization (SPBO) algorithm as most promising one, comparing it with other two popular nonparametric algorithms, i.e., symbiotic organisms search (SOS) and Harris hawk (HHO). A novel framework (with suitable wei...

This paper highlights on the active power sharing of manifold distributed generators (DGs) in a microgrid. The microgrid can be functioned in two modes 1) a grid-connected mode and 2) An autonomous mode. In the course of islanded operation, one DG unit should share its output power with other DG units in exact accordance with the load. Unit output power control (UPC) is introduced to control th...

This paper describes an inverter-interfaced distributed generation system that is interconnected with the electric power system. This system has two main goals: to serve customers with reliable electric power and to improve power quality. This system is interfaced through inverters because they are effective to control output voltage and current. Because DGs are interconnected with the electric...

An intelligent method based on wavelet neural network (WNN) is presented in this study to estimate voltage harmonic distortion waveforms at a non-monitored sensitive load. Voltage harmonics are considered as the main type of waveform distortion in the power quality approach. To detect and analyze voltage harmonics, it is not economical to install power quality monitors (PQMs) at all buses. The ...

Optimal placement of switching devices is a very important for distribution networks‟ planning, operation and cost minimization. Further identifying optimal placement of switches is typical if the distribution system consists of Distributed Generators (DGs). Generally DGs are used to reduce the losses, to improve the voltage profile and to increase the reliability of the system. Further in orde...

Our project is studying the process by which groups of individuals work together to build large, complex structures of ideas and is developing a distributed hypermedia collaboration environment (called ABC) to support that process. This paper focuses on the data model of the Distributed Graph Storage (DGS) component of ABC. The DGS supports a graph-based data model, conservatively extended to m...