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A Hybrid Power System with DC Connection at

Back-Back Converters for Microgrid

Project Objective

The main object of this project is the necessity of an AC or DC Microgrid is governed by

available micro sources and connected loads. Hybrid structure can ensure a sustainable

configuration blending both the forms. In this paper, a hybrid Microgrid structure for a grid

connected Microgrid with DC connection at back to back (B2B) converters is proposed. While a

B2B connection between two AC systems could bestow a reliable, isolated and efficient

coupling, an extra DC bus connection can facilitate use of the DC micro sources.

Introduction

The widespread interconnection of distributed generators (DGs) has created possibility of

Microgrid, both in AC and DC forms. Combining both AC and DC systems, hybrid Microgrid

has been proposed by many researchers. The main challenge in such micro grid structure is to

manage power flows among all sources distributed in the AC and the DC grids. Suitable control

schemes are proposed for such system. The coordination control algorithms are proposed in to

balance the power flow between the AC and the DC grids and to maintain both the DC and the

AC voltages.

Software Requirements

MATLAB – Simulink

PSCAD

Existing Method

The widespread interconnection of distributed generators (DGs) has created possibility of

Microgrid, both in AC and DC forms. Combining both AC and DC systems, hybrid Microgrid

has been proposed by many researchers.

Drawbacks: Power sharing in hybrid structure, AC and DC bus voltage stability, Power

exchange between the AC and DC bus, Power quality and system reliability.

Proposed Method

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www.coretronix.orgAim:

The main aim of this project is the control schemes improve the voltage stability in the

DC bus and the efficacy of the controller is verified considering the uncertainty of the generators

and loads existed in Microgrid.

Abstract

The necessity of an AC or DC Microgrid is governed by available micro sources and

connected loads. Hybrid structure can ensure a sustainable configuration blending both the

forms. In this paper, a hybrid Microgrid structure for a grid connected Microgrid with DC

connection at back to back (B2B) converters is proposed. While a B2B connection between two

AC systems could bestow a reliable, isolated and efficient coupling, an extra DC bus connection

can facilitate use of the DC micro sources.

Advantages

The results show the efficiency of the proposed method to minimize the operation cost and

emission level. A hierarchical active power management strategy for a medium voltage (MV)

islanded Microgrid is proposed.

The proposed scheme control the power flow of the multiple AC-DC bidirectional converters

connected in parallel that connect AC and DC buses.

Applications

o Third party Microgrid integration to the utility with high reliability. Multiple AC DC micro

grids integration at common point.

o DC data centre connection to AC Microgrid and utility.

o Active distribution with AC DC sources and loads.

Speak to: +91-9940798943 Write to: coretronixprojects@gmail.com

www.facebook.com/coretronix www.slideshare.net/coretronix

www.coretronix.orgCircuit Diagram

Speak to: +91-9940798943 Write to: coretronixprojects@gmail.com

www.facebook.com/coretronix www.slideshare.net/coretronix