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CIRED 2015 poster session – paper n° 1045 – session n° 3
LV4MV: A CONCEPT FOR OPTIMAL POWER FLOW MANAGEMENT IN DISTRIBUTION GRIDS, USING DER FLEXIBILITY
A novel approach of MV voltage plan setting based on LV voltage deviation tolerance assessmentsEmmanuelle VANET
Raphaël CAIRENouredine HADJSAID
Univ. Grenoble Alpes, G2Elab – France
Gaspard LEBELStéphane BEDIOUAlain GLATIGNY
Schneider Electric – France
The large penetration of Distributed Generation among the distribution grids engenders voltagedeviations in both Medium and Low Voltage levels. To cope with it, Distribution System Operatorscan either use network reinforcement, or voltage regulation through management of local activeand reactive powers of the Distributed Energy Resources. LV4MV aims to prepare the optimizationof MV network operation, determining the admissible voltage ranges at the critical MV/LV substations,depending on the downstream LV networks and their available flexibility.
Constraint management, Distributed Energy resources (DER), Distributed Operation, DSO ancillary services, Short-term local flexibility, Voltage regulation
KEY WORDS
[email protected] Emmanuelle-Vanet
PROCESSPROBLEMATIC
MV network operation
optimization
LV voltage constraints
?MV voltage constraints
ok • Or enlarge these admissibleMV ranges by activating DERdown the MV/LV substationuntil the network satisfies theGrid codes
• Perform a MV OPF to optimize network losses with these newly defined MVvoltage ranges
• Calculate at the critical MV/LV substations, the MV range that guarantee that theoccurrence of any MV voltage value contained within this range will not induce a LVvoltage deviation of more than ±10% at any point of the LV feeders supplied.
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Network losses minimization on a real 2-feeders MV network
MV admissible voltage ranges determination on a real unbalanced LV network
Step-by-step DER flexibility activation process
OR LV DER ACTIVATION TO INCREASE MV RANGES?
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Vadm=[0,91;1,035]
23 x 12kW residential consumers65% GED
Vadm=[0,91;1,07]
23 x 12kW residential consumers30% GED
ErDF profiles, S26,j4 (last week of June, 2011)
At MV/LV transformers… Are voltage profiles
compliant down the LV feeders?
0,91 pu
1,035 pu
1 ADMISSIBLE MV RANGES
0,91 pu
1,07 pu
CHANGEOLTC
POSITION?
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