Energy Storage at the Distribution Level – Technologies, Costs and Applications
2.1.5 Summary and key findings of the pilot projects Table 14 below illustrates the key features of the pilot projects that have been discussed in the previous section. TABLE 14: Summary of the pilot projects and key learning
Pilot locations
Applications
10 MW/10 DSM, MWh BESS in Frequency Rohini, Delhi regulation, Peak shaving and Reactive Power Control
Battery chemistries
Technical characteristics
Key findings
Lithium Nickel Manganese Cobalt Oxide (NMC)
Design capacity: 10 MWh/ 10 MW
DSM penalty savings during FY 2020-21: INR 22 lacs (approx.)
Maximum discharge rate: 1 C SOC range: 1099%
Voltage improvement: 2.13% by operating the system for 13 instances Total project cost: INR 47.3 Crore approx.(30% for battery packs and 10-15% for converters)
500 kWh BESS at PGCIL facility in Puducherry
Energy time shift, Frequency regulation
Lithium ferrophosphate (LFP) and Advanced Lead Acid
Design capacity: 398 kWh (LFP); 691.2 kWh (Adv. Lead-acid) Usable capacity: 357 kWh (LFP); 384 kWh (Adv. Leadacid)
The cost of LFP is 1.5 times of Adv. Lead-acid Area footprint: 30 sq. meter (LFP), 45 sq. meter (Adv. Lead-acid)
Discharge rate: 2C 410 kWh BESS pilots at multiple locations under BRPL licensee area in Delhi
Peak shaving Lithium ferro(cat.-A), phosphate (LFP) Reliability improvement (cat.-B), Energy time shift (cat.-C)
Design capacity: 288 kWh (cat.-A), 216 kWh (cat.-B), 72 kWh (cat.-C).
LFP emerged out to be a techno-commercially suitable technology for all three applications
Discharge rate: 1C (cat.-A), 2C (cat.-B), 1 C (cat.-C).
Total project cost: INR 2.5 Crore (40% of total cost for battery packs, 20% for PCS and 16% for 5 year AMC)
SOC range: 1595%
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