In this paper, the concept of secondary control is applied for voltage unbalance compensation in an islanded microgrid. The aim of the proposed control approach is to enhance the voltage quality at the point of common coupling (PCC). Unbalance compensation is achieved by proper control of distributed generators (DGs). The DGs control structure mainly consists of active and reactive power contro...

Voltage source inverters (VSIs) are usually used for all kinds of distributed generation interfaces in a microgrid. It’s the microgrid’s superiority to power the local loads continuously when the utility fails. When in islanded mode the voltage and frequency of the microgrid are determined by the VSIs, therefore the power quality can be deteriorated under unbalanced and nonlinear loads. A volta...

Objectives: This study proposes a droop controlled voltage unbalance reimbursement technique in an islanded microgrid. Methods/Analysis: The control system is executed in áâ static reference frame work. Here the distributed generators (DGs) inverters are managed appropriately to compensate imbalance in allocating active as well as reactive powers. The control system includes active as well as r...

Abstract: A fuzzy logic controller (FLC) with fast reference voltage generation to correct and regulate unbalance voltage in three-phase system is proposed. The compensation algorithm is not based on threesymmetrical component decomposition so the controller can yield a fast response that is essential in such a critical real time control work. The reference voltage is fed to the FLC , which is ...

Any problem with voltage in a power network is undesirable as it aggravates the quality of the power. Power electronic devices such as Voltage Source Converter (VSC) based Static Synchronous Compensator (STATCOM) etc. can be used to mitigate the voltage problems in the distribution system. The voltage problems dealt with in this paper are to show how to mitigate unbalanced voltage sags and volt...

The smart grid and micro-grid technologies are playing necessary role in power system due to their benefi ts over traditional utility grid system. In micro grid, control and management has many functions to keep up stability and to boost power quality of the system. In this paper, a hierarchical control is presented which incorporates primary, secondary and tertiary control levels are planned f...

This paper describes two harmonic detection methods used in industrial shunt Active Filters. The methods are overall harmonic compensation and selective harmonic compensation. Both methods are described and analyzed in the paper together with several practical design steps for Adjustable Speed Drives applications. The methods are compared in the case of voltage unbalance and pre-distortion, com...

Soft open points (SOPs) are power electronic devices that may replace conventional normally-open in distribution networks. They can be used for active flow control, reactive compensation, fault isolation, and service restoration through network reconfiguration with enhanced operation flexibility grid resiliency. Due to unbalanced loading conditions, the voltage unbalance issue, as a common prob...