SSD2014 Invited keynote: Research challenges in Microgrid technolgies

RESEARCH CHALLENGESIN MICROGRID TECHNOLOGIES

MicroGr dRESEARCH

PROGRAMME

PostDoc - DFF Juan C. Vasquez

[email protected]

Professor Josep M. Guerrero

[email protected]

http://www.ritsumei.ac.jp/se2012/re/ee/eng/faculty/

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Microgrid Definition and Operation

Microgrid Research Programme in AAU

Microgrid Research activities and laboratories

Outline

International Conference on Power Electrical Systems - SSD 2014

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General aspects of a MicroGrid: “Definition and Operation”

What is a Microgrid? Renewable Energy Resources

Main Utility Grid

Compressed Air System

Electric Vehicles

PCC

Batteries

Household appliances and electronics

PV

EV

Flywheel

Power Electronics

PV

WT

IBS

DC Coupled Subsystem

PV


Hybrid AC/DC Microgrids

Renewable Energy Resources

Main Utility Grid


Electric Vehicles

PCC

Batteries


PV

EV

Flywheel

Power Electronics

PV

WT

IBS


PV

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Modes of Operation: ISLANDED




Main Utility Grid


Electric Vehicles

PCC

Batteries


PV

EV

Flywheel

Power Electronics

PV

WT

IBS


PV

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Modes of Operation: GRID CONNECTED



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Primary Control

Tertiary Control

Secondary Control

BW

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

Hierarchical Control for MicroGrids



Power Import/export from/to the grid.

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

Microgrids Concerns…

Stability

PowerQuality

System recovery after faults (selfheal)

Island detection and Grid Synchronization

P/Q flow Control

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Problem: Harmonics in MicrogridsPossible solutions:- One DG unit could give more harmonics than

another. (harmonic current sharing)- Voltage Harmonic Reduction (Control strategies

for HC)


Issues in MicroGrids: Power Quality

Problem: Unbalances in MicrogridsPossible 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.

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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.


Issues in MicroGrids: Communications

• 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).

9International Conference on Power Electrical Systems - SSD 2014

Issues in MicroGrids: Protections


Main Utility Grid


Electric Vehicles

PCC

Batteries


PV

EV

Flywheel

Power Electronics

PV

WT

IBS


Source Protection Network Protection Bidirectional Protection

Intelligent Control and Protection Methods applied to MicroGrids

LOADS

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Microgrid Research Activities

Microgrid Research Programme and laboratories

Outline


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Microgrids Research

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


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Microgrids Research

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

Primaryresponse

Secondaryresponse

kDGQ

Voltage Amplitude Restorationf

P

kDGP maxP

MGf

Primaryresponse

Secondaryresponse

Frequency Restoration

Connection/disconnection load or generation Frequency and voltage deviation


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MGCC

LocalControl

…

LocalControl

LocalControl

Microgrid

Remote sensing

SecondaryControl

Communications

Centralized Secondary control Distributed Secondary control

Communication link

Microgrids Research


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TERTIARY CONTROL AND ENERGY MANAGEMENT SYSTEM IN MICROGRIDS

Microgrids Research



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Load

Load

DC COMMON BUS

DC COMMON BUS

DC/DC

CONVERTER

DC/DC

CONVERTER

DC INPUT

RdroopVr

DC System Optimization ---- Local Generation Control

Typical Efficiency CurveProblem Formulation

Constraints• Capacity• DC Bus Voltage• System Dynamics

Objective• System Overall Efficiency

Microgrids Research


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Microgrids Research


PQ PQ

PQPQ PQ

<=2.5

UNBALANCE COMPENSATION OPTIMIZATION


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DISTRIBUTED ACTIVE SYNCHRONIZATION FOR MICROGRID UNDER UNBALANCE AND HARMONIC DISTORTIONS

Microgrids Research

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ISLANDED MODE

Grid-connected

mode

Shut down

Black start

STS = ON

STS = OFF

Current/VoltageSource

Sync

Voltage Source

Star

t

Stop

Stop

Intentional/Unintentional

islanding


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

DC MicrogridsOperation and Control

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Microgrids Research

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Basic controlBasic control

Configuration


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Future Residential LVDC Power Distribution Architectures

This project will be done in cooperation with:

International ranked research institutions

And the Danish Companies


http://www.ritsumei.ac.jp/se2012/re/ee/eng/faculty/

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Phase 1. Design, modelling and controlPhase 2. Coordination and control of power electronic units connected to the DC busPhase 3. Grid integration and interactivity


380Vdc Powered Home


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380Vdc Powered Home

1. Vdc consumer electronics2. 12/24 Vdc wall sockets3. 12 Vdc LED lighting4. 24 Vdc home entertainment system5. 12 Vdc coffee maker6. 12 Vdc refrigerator7. 24 Vdc vacuum cleaner8. 48 Vdc washing machine9. 48 Vdc air conditioner10. 12 Vdc hair dryer11. 48 Vdc whisper wind turbine12. PVs connected in 380vdc bus bar13. 380vdc charger14. 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

intelligent DC living lab - iDClab


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

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Outline



Microgrid Research Activities

Microgrid Research Programme and laboratories

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Programme Purpose

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


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MICROGRID RESEARCH TEAMMICROGRID RESEARCH TEAM @ AALBORG


PhDsP. Coordinators

Josep M. Guerrero

Post DocsTomislav DragicevicDC MGs

Fabio AndradeMGs stability

Qobad ShafieeSecondary Control

Lexuan MengTertiary Control

Dan WuPrimary Control

Chendan LiMGsAgents

Yajuan GuanAncillary services for MGs

Nelson DiazEnergy storage for MicroGrids

Chi ZhangLVDC distribution MGs

Hengwei LinManagement and Protection for Microgrids

Xin ZhaoAC/DC Hybrid MG

Bo SunEV Charging Stations

PhD GuestsJavier RoldanLVRT & PQ

Valerio MarianiNonlinear Control

Ernane CoelhoMGs modelling

Juan C. Vasquez

Visiting Prof.Min ChenPower Electronics

Yang HanPQ & MV MGs

INTELLIGENT MICROGRID LAB - iMGLAB

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MicroGrid Research Lab – ET Location

DEPARTMENT OF ENERGY TECHNOLOGY – ET-AAU


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ET Intelligent MicroGrid Laboratory


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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MicroGrids Courses


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www.microgrids.et.aau.dk

Microgrid research and activities

29 29International Conference on Power Electrical Systems - SSD 2014

30 30International Conference on Power Electrical Systems - SSD 2014

Research Challenges in MicroGrid technologies

Thank you for your attention!

[email protected]@et.aau.dk

MicroGr dRESEARCH

PROGRAMME

SSD2014 Invited keynote: Research challenges in Microgrid technolgies

Education

Transcript of SSD2014 Invited keynote: Research challenges in Microgrid technolgies