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Proposal APERTURES. PART B Priority6.1.3.1.1.2 - FP6-2005-TREN-4 p 43 of 49
Workpackage number 3 Start /close date / starting event: 0 to 35 (36 months)
Workpackage Title RESEARCH IN INNOVATIVE APPLICABLE GRID CONTROL MODELS & STRATEGY
OPTIMISATION
Participant identity 4 NOTT 3 ISSI 5 MARI 1 CIRT 6 SASS TOTAL
Person-months 46 45 18 10 1 120
Key Objectives :
1. To monitor and control the local state of a power system using on-line, real time impedance measurement and
subsequently embed the real-time impedance measurement into any grid connected power electronic device –
specifically shunt active harmonic filters and RES interface converters.
2. To determine the optimum power electronic interfaces for connecting RES and energy storage systems to the weak grid,
to incorporate auto-tuning (plug and play) and autonomous
3. Coordinate the estimation of impedance from several points within the microgrid and determine a coordinated control
strategy for each generator/energy storage element to maximise the efficiency of the microgrid and provide secure and
reliable supply.
Description of work : Mains tasks
Task 3.1: (M0 to M 23) Power System State Monitoring will determine a robust measurement technique for power system impedance using
a power electronic interface. This will be extended to include local state monitoring (W, VAr flow etc) and will employ both invasive
techniques (already well established at the University of Nottingham) and new techniques which do not disturb the power network.
Task 3.2 : (M11 to M 35) Intelligent/Autonomous Control The challenge here will be to employ the state estimation in Task 3.1 to derive
reference signals and control laws for the power electronic interface to the RES or energy storage. Traditional state space approaches will be
combined with model reference and fuzzy controllers to determine a flexible, robust mechanism for the interface to operate in the presence of
uncertain system conditions.
Task 3.3 : (M11 to M 23) Protection Protocol: The work here will investigate the coordinated monitoring of the system parameters to
determine the presence of anomalous or fault conditions and take concerted action to mitigate the causes. This will be an innovative use of
impedance measurement, perhaps allowing a zone within the island to operate under islanded conditions in the presence of a remote fault.
Particularly challenging is the need to balance autonomous control of the individual elements of the system with the coordinated system control
currently used by the central generation system.
Task 3.4 (M 0 to M 23) Power Electronic Development. The work in this task will determine the best operation of the power
electronic configurations investigated in WP4. Key to this work is the coordination between partners 1, 2, 3, 4 and 5 to benefit
from the combination of research innovation and the experience of industrial providers. This task will also look at the practical
issues of embedding the impedance measurement strategy and autonomous control into the real equipment.
Task 3.5 (M 24 to M 35) Intelligent Control Optimisation. This task will continue to look at the practical issues of
embedding the impedance measurement strategy and autonomous control into the real equipment as it is being deployed on-site.
Task 3.6 (M 24 to M 35) generalisation. This task will extend the design techniques employed for the specific demonstrator
sites such that they can be employed in the design of RES/energy source for any weak system/microgrid.

Deliverables
D 3.1 Use of impedance measurement in power quality equipment, to enhance operation and reliability
D 32 Techniques for local voltage control – both magnitude and quality – from embedded generation with power electronic
interface
D 3.3 New on-line methodologies to discriminate between fault scenarios and determine suitable corrective action
D 3.4 New methodologies for the control of islanded systems
D 3.5 Design of optimum power electronic equipment for RES and energy storage
D 3.6 Auto-tuning for power electronic interfaces
D 3.7 Plug-and-play operation of power electronic interfaces
Milestones and expected result
th
M3.12 Meeting between all partners at the end of the 18 month to discuss the achievement of the impedance measurement how
best to implement impedance monitoring on embedded generation and RES power electronic interfaces. This meeting will also
investigate the potential for spin-off projects, commercialisation and future projects in this field.
th
M3.30 Meeting between all partners at the end of the 30 month report on the viability of the new techniques for voltage and
power control within the microgrid.
M3.36 Meeting to conclude the project and provide the final report for the project as a whole.
R.1 Decision on hardware topologies to be employed on site
R 2 Initial validation of control design and implementation tools for specific case studies used in this project
R.3 Generalised design and operating tools for microgrids.