Evolution of Microgrids with Converter-Interfaced Generations: Challenges and Opportunities (original) (raw)

State of the Art in Research on Microgrids: A Review

The significant benefits associated with microgrids have led to vast efforts to expand their penetration in electric power systems. Although their deployment is rapidly growing, there are still many challenges to efficiently design, control, and operate microgrids when connected to the grid, and also when in islanded mode, where extensive research activities are underway to tackle these issues. It is necessary to have an across-the-board view of the microgrid integration in power systems. This paper presents a review of issues concerning microgrids and provides an account of research in areas related to microgrids, including distributed generation, microgrid value propositions, applications of power electronics, economic issues, microgrid operation and control, microgrid clusters, and protection and communications issues.

Microgrid Building Blocks: Concept and Feasibility

IEEE Open Access Journal of Power and Energy

For power grids with high penetration of distributed energy resources (DERs), microgrids can provide operation and control capabilities for clusters of DERs and load. Furthermore, microgrids enhance resilience of the hosting bulk power grid if they are enabled to serve critical load beyond the jurisdiction of the microgrids. For widespread deployment of microgrids, a modular and standardized Microgrid Building Block (MBB) is essential to help reduce the cost and increase reliability. This paper proposes the conceptual design of an MBB with integrated features of power conversion, control, and communications, resulting in a systemwide controller for the entire microgrid. The results of a feasibility study indicate that, in a utility-connected mode, MBB-based microgrids can exchange power with the hosting power grid while serving regulation and optimal dispatch functions. In a resiliency (islanded) mode when the microgrid is disconnected from the utility system, the MBB control system acts to stabilize the system frequency and voltage under small or large disturbances. The microgrid controller is supported by a communication system that meets the latency requirements imposed by the microgrid dynamics as well as data acquisition time. The extended IEEE 13-node system is used as a microgrid model to validate the proposed MBB design and functionality.

CHALLENGES IN RECENT MICROGRID SYSTEMS: A REVIEW

This paper presents the current status and challenges of microgrid systems as well as the barriers that should be encountered for their integration to the electrical power network. The important issues related to the microgrid are its, autonomous operation, control strategies, regulatory barriers and protection in islanding operation which are being discussed in this paper. Some examples of practical installations worldwide will also be presented.

Microgrid systems: Current status and challenges

2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA), 2010

The objective of this paper is to present the current status and state-of-the-art of microgrid systems as well as the barriers that are being encountered for their integration to the network. The expectation about the microgrid performance is high, thus, issues related to the microgrid standards, autonomous operation, control strategies, regulatory barriers as well as its protection and islanding operation, among other aspects, will be discussed herein. Some examples of practical installations worldwide will also be presented.

Microgrid: Innovation, Challenges and Prospects

IJRASET, 2021

In the present world where environmental issues are posing a great threat to the survival of mankind a better yet effective way of reducing carbon emissions and improving the environment by less usage of fossil fuels was suggested. This approach was called microgrid (MG). Renewable energy resources could be used effectively to produce electricity and can be easily integrated with the conventional grid. This paper elaborates on the basic concept of microgrid, and then describes the challenges and future prospects of the microgrid. Distribution generators along with energy storage devices and proper interfacing power electronic devices are used. Working on the basis of the type of microgrid is also discussed in this paper.

CONVERTER INTERFACED MICRO SOURCES AMONG RURAL DISTRIBUTED GENERATION FOR RESILIENCE IN MICROGRID

In this emphasis is to improve the resilience of distributed power sharing networked system of microgrid. Operation of DGs in decentralized networked system without communication. The proposed angle droop control is derived from load flow analysis and demonstrated in a similar system to compare the performance of both the droop controllers. This research presents, the power sharing in microgrid with converter interfaced sources. The conventional droop control is demonstrated, as the sources are converter interfaced, it is possible to control the output voltage angles instantaneously. Mathematical derivations are used to illustrate the methodologies.