Impact of Energy storage on Grid Reliability and Efficiency:
Renewable Energy Integration
Hiren Chandra Borah Scientist B
Ministry of New and Renewable Energy Govt. of India
Thermal; 180362; 69%
Hydro; 40867; 16%
Nuclear; 5780; 2%
Renewable; 34352; 13% INSTALLED CAPACITIES (MW)
Total Installed
Capacity = 261361
MW
Indian Power Sector - Overview
* Hydro Power does not include Small Hydro Plants (0 to 25 MW), which is included in Renewables
Wind ; 22645; 66%
Small Hydro; 4025; 12%
Biomass; 4299; 12%
Solar; 3383; 10%
INSTALLED RE CAPACITIES (MW)
Installed Renewable Power Capacity
Total Installed
RE Capacity = 34352
MW
Solar; 750; 84%
Wind; 100; 11%
Bio-Energy; 25; 3%
Small Hydro; 15; 2%
Total RE Potential
= 890 GW
Renewable Energy Potential (890 GW)
Solar; 100; 57%
Wind; 60; 34%
Bio-Energy; 10; 6%
Small Hydro; 5; 3% RE TARGET IN GW
Renewable Energy Targets by 2022 : (175 GW)
Progress of solar power in India
11 36
932
1686
2632
3383
0
500
1000
1500
2000
2500
3000
3500
4000
2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
MW
Year
Installed capacity (MW)
Till June 2015 , about 4000 MW have been installed
Scale up and fast tracking plan : 100 GW by 2021-22
Vision Ahead for solar power
4
10
15 16
17 17,5 17,5
0
5
10
15
20
2015-16 2016-17 2017-18 2018-19 2019-20 2020-21 2021-22
GW
Year
Year-wise Capacity addition Targets (GW)
Drop in Solar PV Tariff over last few years
0,27 0,26 0,23
0,15 0,13
0,11
2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
Euro
s
Year
Regulatory Tariff (Euros/unit)
Less than 0.1 0 Euros this year 2015-16
Microgrids and Rural Electrification
• Microgrids can provide power support to off grid or weaker grids by enabling integration of locally available renewable resources and reducing reliance on Diesel Generators
• Rural Electrification Corporation is Nodal Agency under Rajiv Gandhi Rural Electrification Scheme. – Under the scheme, 90% capital subsidy is provided by Government of
India for overall cost of projects.
• This is generating interest in hybrid renewable + energy storage projects for supplying power to remote villages
• Similar opportunities also exist for commercial & Industrial facilities with weak grid connectivity
100 GW
40 GW Rooftop
60 GW large plants
20 GW
(Entrepreneurs)
10 GW
(PSUs)
5 GW
(Large Pvt. Sector)
5 GW
(SECI)
10 GW
(Through States)
10 GW
(Already Planned Schemes)
100 GW Solar by 2022- Vision
– Renewable Purchase Obligations – Renewable Energy Certificates – Various Schemes for promotion and
deployment of solar plants offering incentives like Feed-in-tariff, Generation Based Incentive, Capital Subsidy, Viability Gap Funding, Bundling with cheap conventional power, etc. to make solar power affordable to Electricity Distribution Companies
Demand Side Initiatives
–Renewable Generation Obligations
–Custom Duty Concessions
– Excise Duty Exemptions
–Other Fiscal and Tax related incentives
Supply Side Initiatives
–25 SOLAR PARKS of capacities 500 MW or above are being set-up in various parts of India, to give impetus to solar power generation.
–GREEN ENERGY CORRIDOR is being built, connecting major solar potential states, to facilitate Transmission of Renewable Energy.
Supply Side Initiatives
–Providing easy finance to roof-top owners for setting up grid connected roof top solar power plants
– Enabling Net Metering Policy
–Obligating installation of solar PV systems on Roof-Tops of new buildings
Steps taken for Promoting Grid-Connected Solar Roof Tops
• Central Electricity Authority (CEA) has notified “Technical Standards for Connectivity of the Distributed Generation Resources-CEA Regulations 2013” which allows the connectivity of grid connected rooftop SPV plants.
• Central Electricity Authority (CEA) has notified the “Central Electricity Authority (Installation and Operation of Meters) Amendment Regulations 2014” which allows the metering arrangement for grid connected solar rooftop system in the country.
Grid Connected Solar Rooftop Systems
Regulations Notified by CEA
Solar Policies supporting grid connected rooftop announced
• 13 States namely Andhra Pradesh, Chhattisgarh, Gujarat, Haryana, Karnataka, Kerala, Manipur, Punjab, Rajasthan, Uttar Pradesh, Tamil Nadu, Uttarakhand and West Bengal.
SERC’s regulations notified for grid connected rooftop solar systems with net metering/feed-in-tariff mechanism.
• 20 States/UTs namely Andhra Pradesh, Chhattisgarh, Delhi, Gujarat, Haryana, Karnataka, Kerala, Odisha, Rajasthan, Tamil Nadu, Uttar Pradesh, Uttarakhand, West Bengal, Andaman & Nicobar, Chandigarh, Dadra & Nagar Haveli, Daman & Diu, Lakshadweep, Pondicherry and Goa have the regulations that include promotion of have come out with their
• Remaining States are requested to come out with their policies/regulations . Drafts are under preparation
Grid Connected Solar Rooftop Systems Policy and Regulations
MNRE
• DISCOMs have to play a vital role in those States where the
regulatory framework has been notified by respective SERCs. They are required to allow connectivity, replace meters and develop a mechanism for operating a grid connected rooftop system.
• The procedure for inviting applications, providing connectivity, implementing net-metering mechanism should be made simple and easy for the customers.
• DISCOMs may also encourage the potential entities and individuals for solar rooftop installations.
• A simple application format may be developed for inviting applications and if possible, the single window approach may be followed.
Actions Solicited from DISCOMs
• Some encouraging incentives like rebate in electricity bill, mandatory requirement for installation of grid connected rooftop solar systems in all Government buildings, advertisement through electric bills etc. may be considered by States.
• At the District Collectors level, some prizes may be considered for the best installations of grid connected rooftop solar systems in the State.
• Under IPDS the grid connected rooftop solar system has been taken
up as a component and a guideline has been issued. Its implementation for grid connected rooftop solar system’s installations needs to be ensured under IPDS.
Actions Solicited from States
• The Ministry of New and Renewable Energy, Government
of India organized the First Renewable Energy Global
Investors Meet & Expo (RE-Invest) on 15-17 February 2015
in New Delhi.
• The central theme of RE-Invest was to attract large scale
investments for the renewable energy sector in India.
• RE- Invest 2015 enabled the global investment community
to connect with renewable energy stakeholders in India.
RE-INVEST 2015
RE-INVEST 2015
•The event was attended by over 200 investors
and over 1000 delegates, both domestic and
international.
•As part of this event, India got a commitment
of more than 265 GW by Solar Power
Developers, as well as various banks/financial
institutions
• The event was attended by over 200
investors and over 1000 delegates,
both domestic and international.
• As part of this event, India got a
commitment of more than 265 GW by
Solar Power Developers, as well as
various banks/financial institutions.
RE-INVEST 2015
Nature of renewable energy supplies and real challenge
Renewable energy supplies are continuing or repetitive current of energy occurring in natural environment The initial input power from renewable energy
supplies therefore is outside our control; and matching supply and demand in the time domain is a real challenge Two ways to overcome this challenge are :
Either matching the load to the availability of renewable energy supply when it is available, or for constant load, hybridize it with an auxiliary energy supply system
Storing the energy for future use i.e. keeping it available when and where it is required
Need of storage
• Energy storage is essential to balance supply and demand.
• Higher levels of energy storage are required for grid flexibility and grid stability and to cope with the increasing use of intermittent wind and solar electricity.
• Smart cities ( target 100 nos), a key energy policy goal, require smart grids and smart storage.
Few energy storage technologies
Batterries
Lead Acid ( mostly used in India) Flywheels
Sodium-Sulfur Batteries (NAS) Electrochemical Capacitors
Sodium Sulphur Batteries Pumped Hydro
Vanadium Redox Batteries Compressed Air Storage
Zinc Bromine Batteries Other tech.
Li Ion