DC MICROGRID PPT.pptx

DC MICROGRIDE

1. DC MICROGRID

2. Introduction To Microgrid What is Microgrid? It is a small- scale power supply network that is designed to provide power for a small community. It enables local power generation for local loads. It comprises of various small power generating sources that makes it highly flexible and efficient

3. Introduction To Microgrid What is Microgrid? It is connected to both the local generating units and the utility grid thus preventing power outages. Excess power can be sold to the utility grid. Size of the Microgrid may range from housing estate to municipal regions.

4. Typical Microgrid is shown below:

5. The Need Of Microgrid Microgrid could be the answer to our energy crisis. Transmission losses gets highly reduced. Microgrid results in substantial savings and cuts emissions without major changes to lifestyles. Provide high quality and reliable energy supply to critical loads

6. Advantages & Disadvantages Microgrid Advantages The use of both electricity and heat permitted by the close proximity of the generator to the user, thereby increasing the overall energy efficiency. Microgrid can act to mitigate the electricity costs to its users by generating some or all of its electricity needs.

7. Advantages & Disadvantages Microgrid Disadvantages Voltage, frequency and power quality are three main parameters that must be considered and controlled to acceptable standards whilst the power and energy balance is maintained. Electrical energy needs to be stored in battery banks thus requiring more space and maintenance. Resynchronization with the utility grid is difficult.

8. DC Microgrid DC Microgrids are high reliability and efficiency, simpler control and natural interface with renewable energy sources (RESs),Electronic loads and Energy storage system(ESSs). DC Distribution network is well as compared to AC Distribution network system. So DC system operated autonomously or connected to AC utility mains. 27/11/2022

9. DC MG SYSTEM OVERVIEW 1.Single-bus Topology 27/11/2022

10. DC MGs bus through dedicated converter. 27/11/2022

11. 27/11/2022 2.Multi- bus Topology Higher availability and reliability. Location of intervention is on the load side where critical load automatically select the bus to be supplied from based on higher voltage. MGs able to inject or absorb power from its neighboring MGs in case of shortage or surplus of power.

12. 27/11/2022 SST Enabled DC MG Low voltage DC distribution systems can be interfaced to medium voltage AC utility mains through SST.

13. 27/11/2022 3.Reconfigurable Topology- Each nodes are controlled by intelligent electronic devices(IEDs) High reliability and redundant operation. Load connected to the common DC bus can be fed bi- directionally, alternating path is provided ring bus in case of fault.

14. 27/11/2022 Multi- terminal DC MG- MTDC architecture was originally for HVDC systems. e.g off shore wind farms. DC distribution network is fed by multiple input terminals.system usually mesh configuration. More flexible.

15. Application of DC MGs 27/11/2023 1.High efficiency Households 2.Renewable Energy Parks. 3.Hybrid Energy storage systems. 4.Electric vehicle fast charging stations

16. Controlling techniques in DC microgride Linear control Non–linear control Active control Passive control

17. Conclusion and Future trends- Transformation of Microgrids system today into the intelligent, robust energy delivery system in the future by providing significant reliability and security benefits. Transition between grid connected and islanded modes on interaction phenomena between distribution generation and high penetration of distributed generation. To investigate full- scale development, field demonstration, experimental performance evaluation of frequency and voltage control methods under various operation modes. 27/11/2022

18. References Tomislav Dragicevic, Member, IEEE, Xiaonan Lu, Member, IEEE, Juan C. Vasquez, Senior Member, IEEE and Josep M. Guerrero, Fellow, IEEE Web sources 27/11/2022

19. 27/11/2022