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150KVAR
MAINS APFC for 700KVA Tranformer
(example
AEC, India)
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VAR Compensation of
Distribution Transformers:
The total electricity being distributed by Utilities in
India is around 80,000 Mega Watts. So far, in India, most
Utilities have not been emphasizing their own VAR
compensation systems at the substation points to reduce
their T&D
losses. However, it is becoming increasingly relevant
and important to reduce the transformer currents and
improve the system voltage by suitable compensations
throughout the whole electrical systems.
A transformer is the core
and among the most essential equipment for transmission
and distribution of electricity. According to estimates,
every megawatt of power capacity needs around 6MVA of
power transformer. Distribution losses in India account
for almost 18% of the total transmission and distribution
(T&D) losses of around 26%. The no-load losses of a
typical 100KVA distribution transformer is around 360
watts, and this can reduced by 75% by providing suitable
VAR compensation using Automatically Switched shunt
Capacitor Banks at the secondary side.
- SSL is the technological
leader in configuring, manufacturing, and installing
such automated solutions for the Utilities'
transmission and distribution network, using the CSCI
technologies designs that are state of the art
worldwide. The Company typically refers to these
products as "Mains APFC Panels.
-
-
Heavy Duty
(Long Life) Sprague Fixed Capacitor Banks
Saha Sprague can
also offer Financing
for these MAINS APFC Panels, so that Utilities do not have
to worry about funding, and more importantly, their
immediate savings more than outweigh the monthly lease
rentals for these panels, making this a self funding
T&D loss reduction measure.
- Example of Benefits to
Utilities by VAR Compensation.
- Based on Saha
Sprague Limited's Project Experience at
- The
Ahmedabad Electricity Company Limited
(India)
- per
each 150KVAR Main APFC Panel
| Area
of Savings |
Observations |
Key
Benefits to Utilities |
- KVA Savings
|
- 60 to 75 KVA
|
- Additional KVA
available for extra connections.
|
- Current Savings
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- 50 Amps to 80A per
phase.
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- Substantial
reduction in I2R losses. Savings in
Cable costs to the utility.
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- Voltage
Improvement
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- 3.5% to 4.0 %
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- Improved voltages
leads to efficient metering
|
- PowerFactor
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- 0.99 Lag
maintained
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- Close to Unity PF
and lesser maintenance for system.
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- KVAR Delivery
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- Upto 105% maximum
and varying depending on load.
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- Reduces the
current flow required for reactive power
requirement in the system.
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- KW Savings
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- This works out to
- Approximately 15
to 20
- Units a day on an
average.
|
- The magnetising
losses (both core loss as well as Copper loss)
due to reactive
- Current is
avoided.
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- ADVANTAGES OF
USING MAINS APFC PANELS:
- Reactive Power requirement is
externally supplied thus releasing substantial KVA
capacity from the transformer.
- Loading on Transformers is
reduced and hence thermal stress is reduced thus
- Enhancement in the working life
period of transformers.
- Separate VAR compensation
eliminates the magnetizing current passing through the
- Transformer to the loads, thus
reducing the losses in the transformer (kwh) savings.
- Automatic compensation helps in
maintaining near unity PowerFactor at the Secondary
side of the transformer thereby facilitating full
utilization of Active Power Flow (KW) and at the same
time without overcompensating the system.
- Energy Savings as mentioned
above.
No. S-915, South Block,9th Floor, Manipal
centre,47, Dickenson Rd, Bangalore – 560042Tel: 080 – 2509
2274,2509 2275
Email: contact@saha.net
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