1. Combined digital current and
voltage transformers for
Smart Grid
[Measuring of currents and voltages
for control Smart Grid]
Speaker: Lebedev Vladimir
Ivanovo State Power University,
JSC «SPA «Digital measuring systems»

2. 02
Problems
• Insufficient accuracy of
conventional current and
voltage transformers
Traditional current
transformer
→ system accidents
→imbalance of power
→ losses 100 million RUB
in month

• Incorrect operation of relay
protection
• Problems with high voltage
insulation. Potential of explosion
and fire
• Analog CT and VT don’t correspond to the innovative
concept «Smart GRID»

3. 03
Product
Structure scheme of
DCVT with
optoelectronic interface
Advantages
• Service is less, saving of 10% of transformer cost
• High measurement accuracy (4 times higher)
• No distortion of the current
• Using digital electrical substations SMART Grid
Composition
• Current and voltage sensors on 5 physical principles
• Digitization on the primary side (on the high voltage)
• Solid insulation
• Fiber optic (radio) transmission

4. 04
Competitors
NxtPhase (Alstom GRID), ABB, JSC «Profotech»
Market niche for DCVT remain significant even with the introduction
of the domestic production and import growth overseas optical CT
Competitive advantages
Characteristic Analog CT
and VT
Optical CT
and VT DCVT
High accuracy class, 0.1s - - +
No problems with insulation - + +
Compliance with the Smart Grid - + +
Stability to temperature and vibration + - +
Low cost + - +

5. 05
Marketing and Sales
Costs for the purchase of
transformers (JSC «FGC EES»)
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
2010 2011 2012 итого
3,303
3,545
3,058
9,906
1,222 1,339 1,154
3,715
Mln. RUB.
ТТ
ТН
Market of DCVT in Russia 1.5 billion rubles
(10% of the Russian market of CT / VT)
total
Target consumers:
• generating companies
• energy companies
(JSC «Russian Grids»)
CT
VT

6. 06
Project team
The team is formed and steadily working for 20 years
15 members: engineers, accountants, economists with experience
Previous funding
Name of competition, grant Finance,
million RUB
Result
1. Federal Program
Organizer: Ministry of Education
7.9 Experimental samples
of DCT
2. Grant UMNIK 0.4 Model samples of DVT
3. State job
Organizer: Ministry of Education
0.65 Theoretical studies of
DCVT
10 patents on digital transformers
15 wins in various competitions

7. 07
Future plans
The total need for financial resources:
steps 1 - 30-35 million rubles
step 2 - 135 million rubles
• Development of Pilot DCVT
• Development of Pilot
production
STEP 1
• Organization of industrial
production
STEP 2

8. 08
Lebedev Vladimir
development director, Ph.D
vd_lebedev@mail.ru
+7910-691-97-76
Thank you for your attention!
Key members of the project
Vladimir Lebedev Victoria
Mozhzhuhina
Andrey YablokovDmitry Libedev Alexey NaumovVladimir Slyshalov