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RESEARCH CHALLENGES IN MICROGRID TECHNOLOGIES PostDoc - DFF Juan C. Vasquez [email protected] Professor Josep M. Guerrero [email protected]

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Page 1: RESEARCH CHALLENGES MICROGRID …vbn.aau.dk/files/186895621/SSD_final_webpage.pdf · IN MICROGRID TECHNOLOGIES ... power quality standards IEC 61727 and IEC 61000-3-6. 8 Timbus et

RESEARCH CHALLENGES IN MICROGRID TECHNOLOGIES

PostDoc - DFF Juan C. Vasquez [email protected] Professor Josep M. Guerrero [email protected]

Page 2: RESEARCH CHALLENGES MICROGRID …vbn.aau.dk/files/186895621/SSD_final_webpage.pdf · IN MICROGRID TECHNOLOGIES ... power quality standards IEC 61727 and IEC 61000-3-6. 8 Timbus et

2

Microgrid Definition and Operation

Microgrid Research Programme in AAU

Microgrid Research activities and laboratories

International Conference on Power Electrical Systems - SSD 2014

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3

What is a Microgrid?

Main

Utility Grid

PCC

Household appliances and electronics

DC Coupled Subsystem

International Conference on Power Electrical Systems - SSD 2014

Hybrid AC/DC Microgrids

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Main

Utility Grid

PCC

Household appliances and electronics

DC Coupled Subsystem

4

Modes of Operation: ISLANDED

International Conference on Power Electrical Systems - SSD 2014

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Main

Utility Grid

PCC

Household appliances and electronics

DC Coupled Subsystem

5

Modes of Operation: GRID CONNECTED

International Conference on Power Electrical Systems - SSD 2014

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Primary Control

Tertiary Control

Secondary Control

Modeling + Inner loops + droop Control (P/Q Sharing).

International Conference on Power Electrical Systems - SSD 2014

Power Import/export from/to the grid.

f/V Restoration (Island) Synchronization (Island to grid Connected mode)

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Problem: Harmonics in Microgrids

Possible solutions:

- One DG unit could give more harmonics than

another. (harmonic current sharing)

- Voltage Harmonic Reduction (Control strategies

for HC)

International Conference on Power Electrical Systems - SSD 2014

Problem: Unbalances in Microgrids

Possible solutions:

- By means of sec. control, PCC voltage

unbalances can be compensated by control

signals to the primary level.

- Voltage Unbalance Compensation (Control

strategies)

Test and verification that the proposed solutions follow the European power quality standards IEC 61727 and IEC 61000-3-6.

Page 8: RESEARCH CHALLENGES MICROGRID …vbn.aau.dk/files/186895621/SSD_final_webpage.pdf · IN MICROGRID TECHNOLOGIES ... power quality standards IEC 61727 and IEC 61000-3-6. 8 Timbus et

8

Timbus et Al. Management of DER Using Standarized Communications and modern Technologies

Communication model provided by IEC 61850 & IEC 61400-25 to describe the

physical devices in the network model.

International Conference on Power Electrical Systems - SSD 2014

• Study meter-bus technology solutions to integrate smart meters and data concentrators according to EN13757. •Develop different levels of communications architectures for residential AMI following IEC61968-9 (interface standard for meter reading and control). •Integrate smart meters and data concentrators in different levels of wireless and meshed network architectures, according to EN13757-5 (standard for radio mesh meter-bus) and EN13757-4 (wireless meter-bus).

Page 9: RESEARCH CHALLENGES MICROGRID …vbn.aau.dk/files/186895621/SSD_final_webpage.pdf · IN MICROGRID TECHNOLOGIES ... power quality standards IEC 61727 and IEC 61000-3-6. 8 Timbus et

9 International Conference on Power Electrical Systems - SSD 2014

Main

Utility Grid

PCC

Household appliances and electronics

DC Coupled Subsystem

Source Protection Network Protection Bidirectional Protection

Page 10: RESEARCH CHALLENGES MICROGRID …vbn.aau.dk/files/186895621/SSD_final_webpage.pdf · IN MICROGRID TECHNOLOGIES ... power quality standards IEC 61727 and IEC 61000-3-6. 8 Timbus et

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Microgrid Definition and Operation

Microgrid Research Activities

Microgrid Research Programme and laboratories

International Conference on Power Electrical Systems - SSD 2014

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COORDINATED CONTROL FOR POWER QUALITY IN GRID CONNECTED - ISLANDED MICROGRIDS

AC Low voltage MicroGrid coordinated control:

AC Microgrids:

Bus frequency signaling

DC Microgrids:

Bus voltage signaling

International Conference on Power Electrical Systems - SSD 2014

Page 12: RESEARCH CHALLENGES MICROGRID …vbn.aau.dk/files/186895621/SSD_final_webpage.pdf · IN MICROGRID TECHNOLOGIES ... power quality standards IEC 61727 and IEC 61000-3-6. 8 Timbus et

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CENTRALIZED AND DECENTRALIZED SECONDARY CONTROL FOR ISLANDED MICROGRIDS

mP **

P

Pmax

Frequency droop

*E E nQ E*

Q

E

Qmax

Amplitude droop

E

Q

maxQ

E

maxQ

Primary

response

Secondary

response

kDGQ

Voltage Amplitude

Restoration f

P

kDGP maxP

MGf

Primary

response

Secondary

response

Frequency Restoration

Connection/disconnection load or generation Frequency and voltage deviation

International Conference on Power Electrical Systems - SSD 2014

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Local

Control

Local

Control Local

Control

Microgrid

Remote sensing

Secondary Control

Communications

Communication link

International Conference on Power Electrical Systems - SSD 2014

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TERTIARY CONTROL AND ENERGY MANAGEMENT SYSTEM IN MICROGRIDS

International Conference on Power Electrical Systems - SSD 2014

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TERTIARY CONTROL AND ENERGY MANAGEMENT SYSTEM IN MICROGRIDS

15

Load

Load

DC

COMMON BUS

DC

COMMON BUS

DC/DC

CONVERTER

DC/DC

CONVERTER

DC INPUT

Rdroop

Vr

DC System Optimization ---- Local Generation Control

Typical Efficiency Curve Problem Formulation

Constraints

• Capacity

• DC Bus Voltage

• System Dynamics

Objective

• System Overall Efficiency

International Conference on Power Electrical Systems - SSD 2014

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TERTIARY CONTROL AND ENERGY MANAGEMENT SYSTEM IN MICROGRIDS

PQ PQ

PQ PQ PQ

<=2.5

International Conference on Power Electrical Systems - SSD 2014

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DISTRIBUTED ACTIVE SYNCHRONIZATION FOR MICROGRID UNDER UNBALANCE AND HARMONIC DISTORTIONS

17

ISLANDED MODE

Grid-connected

mode

Shut down

Black start

STS = ON

STS = OFF

Current/Voltage

Source

Sync

Voltage Source

Stop

Intentional/

Unintentional

islanding

International Conference on Power Electrical Systems - SSD 2014

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• Remote telecom applications • Coupled renewable systems • DC powered homes • Fast HEV charging stations

18 18

Basic control Basic control

Configuration

International Conference on Power Electrical Systems - SSD 2014

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Danish

19 International Conference on Power Electrical Systems - SSD 2014

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Phase 1. Phase 2. Phase 3

20 International Conference on Power Electrical Systems - SSD 2014

380Vdc Powered Home

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380Vdc Powered Home

1. Vdc consumer electronics 2. 12/24 Vdc wall sockets 3. 12 Vdc LED lighting 4. 24 Vdc home entertainment system 5. 12 Vdc coffee maker 6. 12 Vdc refrigerator 7. 24 Vdc vacuum cleaner 8. 48 Vdc washing machine 9. 48 Vdc air conditioner 10. 12 Vdc hair dryer 11. 48 Vdc whisper wind turbine 12. PVs connected in 380vdc bus bar 13. 380vdc charger 14. 380vdc busway distribution system

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5 Workstations - FC emulators - Battery emulators - Flywheels - Supercaps - Dedicated DC/DC - converters - Constant power loads - Real-time monitoring, Control and supervision

22 International Conference on Power Electrical Systems - SSD 2014

1 Setup for Demonstration of DC-home with Real DC appliances.

Page 23: RESEARCH CHALLENGES MICROGRID …vbn.aau.dk/files/186895621/SSD_final_webpage.pdf · IN MICROGRID TECHNOLOGIES ... power quality standards IEC 61727 and IEC 61000-3-6. 8 Timbus et

23 International Conference on Power Electrical Systems - SSD 2014

Microgrid Definition and Operation

Microgrid Research Activities

Microgrid Research Programme and laboratories

Page 24: RESEARCH CHALLENGES MICROGRID …vbn.aau.dk/files/186895621/SSD_final_webpage.pdf · IN MICROGRID TECHNOLOGIES ... power quality standards IEC 61727 and IEC 61000-3-6. 8 Timbus et

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MicroGrid Research Programme Areas

AC MicroGrids DC MicroGrids

Modeling

Control & Operation

Energy Storage

Protection

Power Quality

Standard-based ICT

Networked Control

EMS & Optimization

Multi-Agents

MICROGRID RESEARCH PROGRAMME

International Conference on Power Electrical Systems - SSD 2014

Page 25: RESEARCH CHALLENGES MICROGRID …vbn.aau.dk/files/186895621/SSD_final_webpage.pdf · IN MICROGRID TECHNOLOGIES ... power quality standards IEC 61727 and IEC 61000-3-6. 8 Timbus et

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MICROGRID RESEARCH TEAM MICROGRID RESEARCH TEAM @ AALBORG

International Conference on Power Electrical Systems - SSD 2014

Josep M. Guerrero

Tomislav Dragicevic DC MGs

Fabio Andrade MGs stability

Qobad Shafiee Secondary Control

Lexuan Meng Tertiary Control

Dan Wu Primary Control

Chendan Li MGs Agents

Yajuan Guan Ancillary services for MGs

Nelson Diaz Energy storage for MicroGrids

Chi Zhang LVDC distribution MGs

Hengwei Lin Management and Protection for Microgrids

Xin Zhao AC/DC Hybrid MG

Bo Sun EV Charging Stations

Javier Roldan LVRT & PQ

Valerio Mariani Nonlinear Control

Ernane Coelho MGs modelling

Juan C. Vasquez

Min Chen Power Electronics

Yang Han PQ & MV MGs

Page 26: RESEARCH CHALLENGES MICROGRID …vbn.aau.dk/files/186895621/SSD_final_webpage.pdf · IN MICROGRID TECHNOLOGIES ... power quality standards IEC 61727 and IEC 61000-3-6. 8 Timbus et

INTELLIGENT MICROGRID LAB - iMGLAB

26

ET Location

DEPARTMENT OF ENERGY TECHNOLOGY – ET-AAU

International Conference on Power Electrical Systems - SSD 2014

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27 27 International Conference on Power Electrical Systems - SSD 2014

Every setup is able to emulate a multi-converter low-voltage Microgrid, local and energy management control programmed in dSPACE real-time control platforms.

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28 28 International Conference on Power Electrical Systems - SSD 2014

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www.microgrids.et.aau.dk

Microgrid research and activities

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30 30 International Conference on Power Electrical Systems - SSD 2014

[email protected]

[email protected]