Battery Energy Storage System Pilot
Project, Puducherry
Power Grid Corporation of India Limited
Manish Kumar Tiwari
POWERGRID –An Overview
CENTRAL TRANSMISSION
UTILITY
CONSISTENTLY RATED
A NAVARATNA COMAPANY
‘EXCELLENT’ SINCE 1993-94
CPSU
CREDIT RATING - STABLE
Tr. Lines (as on 30-11-2016)
S/S & MVA (as on 30-11-2016)
Operating Parameters (FY15-16)
132,138 ckm
213 Nos.
Availability: > 99.7%
273,862 MVA
Reliability: 0.66 Trippings
per line
Inter-Regional capacity
63,650 MW
Business Areas
• Transmission: India’s largest Transmission Utility, 1200 kV UHVAC,
800 kV UHVDC
• Telecom: Owns & Operate approx. 40,000 km of network with
point of presence in 595 locations
• Consultancy Services-Transmission, Smart Grid, Energy Efficiency
2
Drivers for Pilot Project on Energy Storage
Balancing support needed for high Degree of Renewable
Penetration (175 GW) by 2022
Very less existing capacity of Grid scale energy storage
in the form of Pumped Hydro storage
High gestation period for Pumped hydro storage
No experience of grid scale energy storage apart from
Pumped Hydro
Why Battery Energy Storage Pilot ?
Higher ramp rate
Lower response time
Modularity in size
Flexibility in transportation
Options of many Chemistries
Objectives for Pilot Project
Proof of concept for application of BESS towards
frequency response & energy time shift
applications – Ancillary Services
First hand experience of different battery
technologies & it’s battery management system
before large scale deployment prospects in future
Policy / Regulatory advocacy for deployment of
such technologies for grid stability
Proposed Technologies
Advanced
Lead Acid
• Mature
technology
• Less
Maintenance
Requirement
• Economical
Lithium Ion
Flow battery
• Fast maturing
• Large
number of
Pilots
worldwide
• High Power
Density
• Higher Depth
of Discharge
• Longer Life
• Upcoming
technology
Size of the Pilot Project
Sl. No.
Technology
Capacity
Package I
Advanced Lead 500 kW-30 Min (250
Acid
kWh)
Package II
Lithium ion
500 kW-30 Min (250
kWh)
Flow
250 kW-4 hours (1000
kWh)
Package III
Technical Specifications
Parameters
Li-ion Battery
Advanced lead
Acid Battery
Flow Battery
Charging rate
3 hrs. from
rated DoD to
Full Capacity
3 hrs. from
rated DoD to
full capacity
5 hrs. from
rated DoD to
full capacity
DC-DC Roundtrip efficiency
>90%
>80%
>75%
Service Life
10 years
10 years
10 years
Life-cycle
4000
cycles 3000
cycles 3000
cycles
(900 MWh)
(675 MWh)
(2700 MWh)
Single Line Diagram
Battery Energy Management System
Power Conditioning Power Management
Monitoring and
System (PCS)
System (PMS)
Control System
• Conversion AC to
Consists of hardware • Facilitates control
DC and vice versa and Software for
room operator to
different applications
monitor
all
• Associated control such as Frequency
parameters
of
and Protection
Regulation & Energy
BESS and exert
system.
time shifting etc.
control
accordingly.
• Equipped with
suitable filter
• Includes suitable
banks, harmonic
protection system
filters to ensure
for
protection
power quality.
against faults.
Protection System
DC System Protection
AC System Protection
• DC Over Current
• Earth Fault Protection
• DC Over / Under
Voltage
• Breaker failure
protection
• Transient / Surge
Protection
• AC Over / Under
Voltage
• AC Over current
• Earth Fault Protection
• AC Over / Under
Frequency
• Breaker Failure
Protection
• Loss of Phase
• Transient / Surge
Protection
• Synchronisation Check
Others
• Protection Against
temperature Rise
• Emergency Stop
• Fire-fighting System
System Configuration: Adv. Lead Acid
Internal Chemistry: Cathode-PbO2, Anode-(Lead+Carbon),Electrolyte- H2SO4
Details of Each Cell: 2V, 600 Ah
Configuration: Two strings are connected in parallel, each string comprises of 300
cells connected in series (total 600 cells)
PCS Efficiency: 96%
Total Capacity of Battery: 691.2 kWh (useful Capacity at 2C was found 384 kWh)
Rated DoD: 65.1%
System Configuration: Lithium Ion
Internal Chemistry: Cathode- Lithium Iron Phosphate, Anode- Carbon &
Electrolyte - Lithium Hexafluorophate and solution of carbonates
Details of Each Cell: 3.2 V, 80 Ah.
Configuration: Battery Module -2 cells in parallel, 6 such units in series (19.2 V,
150Ah). One String-36 modules in series. (432 cells, 691.2 V & 150 Ah), 4 such
strings in Parallel (1728 cells, 691.2 V, 600 Ah)
PCS Efficiency: 96%
Total Capacity of Battery: 398 kWh( useful capacity at 2C 357 kWh)
Rated DoD: 70%
Initial Learnings / Findings
• Preparation of Technical Specification
• Life cycle of the battery
• Global standards for safety, testing etc.
Parameter
Advanced Lead Acid
Lithium Ion
Delivered Size
250 kWh, 500 kW
250 kWh, 500 kW
Design Sizing
691.2 kWh
398 kWh
Nos. of Cells
600 nos.
1728 nos.
Rated DoD
65%
70%
Battery Footprint
One 40 ft. and one 20 ft.
Container
Area Foot print: 45 sq. m.
One 40 ft. Container
Area foot-print: 30 sq.
m.
Cost
-
1.5 times than Advanced
Lead Acid
Package-wise Project Status
Package
Package I
(Advanced Lead
Acid)
Package II (Li-Ion
Battery)
Package III (Flow
Battery)
Status
• Awarded to M/s Zhejiang Narada Power
Source Company limited and M/s Exicom
• BESS components have reached site.
• Commissioning activities are in progress.
• Awarded to M/s Zhejiang Narada Power
Source Company limited and M/s Exicom
• BESS components have reached site.
• Commissioning activities are in progress.
• Awarded to M/s Raychem RPG (P) Ltd in
November, 2016. Commissioning by end of
2017
Some Photographs