Energy Efficiency - Distribution
BSES Rajdhani Power Limited.
Arvind Gujral
Head, Network Operations
 Significant 8~10% (North
America/ Europe ~ 7%)
 Can be reduced but
Unavoidable
 Lower Priority – Not on
the radar of m...
Cause Analysis
 Distribution component inherent losses
– iron and copper losses
 Design parameters of network
elements –...
Cause Analysis
 Supply Parameters – power
factor, harmonics, imbalance
 Load balancing at all voltage
levels
 PF contro...
Technical loss in Distribution Network
BSES Rajdhani Power Limited.
Total losses
0.23% 0.27% 0.32%
0.39%
0.49%
0.60%
0.74%...
Demand Pattern BRPL
0
400
800
1200
1600
2000
00:00-00:15
00:45-01:00
01:30-01:45
02:15-02:30
03:00-03:15
03:45-04:00
04:30...
Energy Input Growth of Delhi
BSES Rajdhani Power Limited.
Peak growth (73.7%) is far more than energy growth (34.7%). Unde...
Energy Input Growth of Delhi
BSES Rajdhani Power Limited.
The growth in peak demand (MVA) at app. 8% far higher than
the i...
DSM – Other Imperatives
• Optimum utilization of Generation, Transmission and
Distribution assets
• Discoms typically tie ...
DSM for Load curve Flattening
Energy storage
• Electricity rate fluctuates in a day – from
maximum to minimum
• Storage sy...
 Introduced in Delhi by DERC in 2012
 Applicable to non-domestic consumers >100KVA
 Summers: +10% during peak hrs and -...
 Demand response (load response) is
“reduction of electricity use by end-
use customers in response to power
grid needs, ...
 Becoming popular
 It is a virtual generation system – Most
environment friendly.
 100% contribute when network is on
s...
IF we store energy when it
is surplus & rates are at the
lowest and consume when
there are shortages & rates
are high
DSM ...
Principle
 Energy storage is a solution to
flatten the load curve
 Energy can be stored in another
form – thermal or Bat...
Energy Storage - Business Model
BRPL had identified a requirement of 100MWh Battery for its grids.
• System Purchase by DI...
17BSES Rajdhani Power Limited.
arvind.gujral@relianceada.com
Phone 011-39999959
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Day-3, Mr. Arvind Gujral, BSES

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  • Day-3, Mr. Arvind Gujral, BSES

    1. 1. Energy Efficiency - Distribution BSES Rajdhani Power Limited. Arvind Gujral Head, Network Operations
    2. 2.  Significant 8~10% (North America/ Europe ~ 7%)  Can be reduced but Unavoidable  Lower Priority – Not on the radar of most Discoms  More complex – requires detailed cause analysis Technical loss in Distribution Network BSES Rajdhani Power Limited.
    3. 3. Cause Analysis  Distribution component inherent losses – iron and copper losses  Design parameters of network elements – rated losses  Star rating of transformers  Use of amorphous core – reduction in iron losses upto 70% Technical loss in Distribution Network BSES Rajdhani Power Limited.
    4. 4. Cause Analysis  Supply Parameters – power factor, harmonics, imbalance  Load balancing at all voltage levels  PF control at Grid and Distribution Transformer level  Harmonics an increasing area of concern due to extensive usage of power elctronics, CFLs etc Technical loss in Distribution Network BSES Rajdhani Power Limited.
    5. 5. Technical loss in Distribution Network BSES Rajdhani Power Limited. Total losses 0.23% 0.27% 0.32% 0.39% 0.49% 0.60% 0.74% 0.89% 1.07% 1.27% 0.00% 0.20% 0.40% 0.60% 0.80% 1.00% 1.20% 1.40% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Total losses Tranformer Capacity 630 kVA Assumed Power Factor 0.85 Lag Full Load Loss 6800 W No Load Loss 1200 W Cause analysis Loading Conditions
    6. 6. Demand Pattern BRPL 0 400 800 1200 1600 2000 00:00-00:15 00:45-01:00 01:30-01:45 02:15-02:30 03:00-03:15 03:45-04:00 04:30-04:45 05:15-05:30 06:00-06:15 06:45-07:00 07:30-07:45 08:15-08:30 09:00-09:15 09:45-10:00 10:30-10:45 11:15-11:30 12:00-12:15 12:45-13:00 13:30-13:45 14:15-14:30 15:00-15:15 15:45-16:00 16:30-16:45 17:15-17:30 18:00-18:15 18:45-19:00 19:30-19:45 20:15-20:30 21:00-21:15 21:45-22:00 22:30-22:45 23:15-23:30 Time of Day Demand(MW) Typical Summer Day Typical Winter Day Typical Day in April Peak Peak Peak Typical BRPL load curve BSES Rajdhani Power Limited. Since most of the technical loss in the network is I2R loss, the losses will rise in proportion to the square of the current loading.
    7. 7. Energy Input Growth of Delhi BSES Rajdhani Power Limited. Peak growth (73.7%) is far more than energy growth (34.7%). Undesirable shape of load curve.
    8. 8. Energy Input Growth of Delhi BSES Rajdhani Power Limited. The growth in peak demand (MVA) at app. 8% far higher than the increase in input energy at app. 4%. Ie the City Load Factor (avg to peak ratio) is deteriorating. •Since network capacity has to cater to the peak demand, higher Capex is required •However the capacity to earn returns on the investement will be lower due to the lower growth in actual throughput in MU’s •Higher technical losses at peak loading conditions Urgent need for interventions required to flatten the load curve - DSM
    9. 9. DSM – Other Imperatives • Optimum utilization of Generation, Transmission and Distribution assets • Discoms typically tie up base load thru long term PPA’s, but peak load power is procured thru bilaterals, at a higher cost • At the same time excess power during lean periods is being disposed of thru UI mechanism at nominal rates, adding to the average cost of power • Consumer awarness and participation in energy conservation BSES Rajdhani Power Limited.
    10. 10. DSM for Load curve Flattening Energy storage • Electricity rate fluctuates in a day – from maximum to minimum • Storage system – consumer can store during non peak . • Storage by Utilities Demand Response • Technology to shift load • Technology to conserve load • Demand response system BSES Rajdhani Power Limited. Time of Day Tariffs • Incentive to consumers to shift to off peak hours • Does not require any new technology/ investment • Voluntary – consumer friendly
    11. 11.  Introduced in Delhi by DERC in 2012  Applicable to non-domestic consumers >100KVA  Summers: +10% during peak hrs and -10% during off peak (peak 3pm- 12midnight, off peak 12-6am)  Winters: +5% during peak hours and -10% during off peak (peak 5-11pm, off peak 11pm to 6am)  Impact found to be marginal, of the order of 2% across the applicable segment  Based on discussions with the Discoms, and their recommendation, this has now been increased to  Summers +/- 15%  Winters +10/ -15% TOD Tarrifs in Delhi BSES Rajdhani Power Limited.
    12. 12.  Demand response (load response) is “reduction of electricity use by end- use customers in response to power grid needs, economic signals from a competitive wholesale market or special retail rates”  Provide opportunities for end-use customers to realize value for reduction in demand  Demand response can compete equally with generation markets Demand Response BRPL BSES Rajdhani Power Limited. BRPL DR Program Facilitator to coordinate DR • Capacity 25 MW • Availability …… 100 Hrs/ year • Typical cost 4.75Rs/ KWh . • Only for volunteers • Incentive for consumers. • Response time .. 45 Mins
    13. 13.  Becoming popular  It is a virtual generation system – Most environment friendly.  100% contribute when network is on stress. A true peak curtailing mechanism  Leads towards energy Conservation. Consumer become knowledgeable as how to reduce consumption.  Totally Volunteers based Demand Response Demand response cannot be compared with load shedding DR helps in reducing peak technical loss DR need policy support Can DR Negawatt can be compared with renewable energy = DR obligation BSES Rajdhani Power Limited.
    14. 14. IF we store energy when it is surplus & rates are at the lowest and consume when there are shortages & rates are high DSM Initiatives – Energy Storage BSES Rajdhani Power Limited.
    15. 15. Principle  Energy storage is a solution to flatten the load curve  Energy can be stored in another form – thermal or Battery  When reused – part is lost in process  Stored energy can be used as and when required Energy Storage - Principle Electric storage also helps in improving supply quality and Reliability BSES Rajdhani Power Limited.
    16. 16. Energy Storage - Business Model BRPL had identified a requirement of 100MWh Battery for its grids. • System Purchase by DISCOM • Rental basis – banking charges • Sale –purchase basis • Charging ( selling to battery) • Discharging ( buying from battery) BSES Rajdhani Power Limited.
    17. 17. 17BSES Rajdhani Power Limited. arvind.gujral@relianceada.com Phone 011-39999959

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