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220kV Thee-phase Two-winding Power Transformer with OCTC

220kV Thee-phase Two-winding Power Transformer with OCTC

    Payment Type: L/C,T/T
    Terms of Trade: FOB,CFR,CIF
    Min. Order: 1 Set/Sets
    Delivery Time: 60-90 Days
    Packaging: Seaworthy Packing
    Productivity: 300 sets/year
    Brand: QRE- QIANCHAO
    Transportation: Ocean
    Place of Origin: China
    Supply Ability: High
    Certificate: ISO
    HS Code: 85042311
    Port: China Sea Port

Basic Info

Model No.: 220kV Power Transformer

Product Description

Part I: Product Overview for 220kV Power Transformer with OCTC

220kV high quality oil immersed power Transformer with OCTC has optimized design using advanced technologies, in order to offer low noise, low partial discharge, high short circuit withstand capability. Advanced design software are used for electromagnetic calculation and design of transformer, while 3-D, 2-D CAD software for structural design ensure sufficient safety margin during short circuit period. This is based on in-depth theoretical and experimental studies on magnetic, thermal, mechanical strength and short circuit strength. To ensure reliability of the transformer, the insulation is decided based on calculation on main and vertical insulation. The accurate calculation of the electric field distribution in inner coils will ensure voltage gradient and at coil end it will ensure lower partial discharge.

Part II: Product Features

1. Potential distribution is effectively improved by application of software to calculate the impact and gradient potential distribution. The potential calculation is also done between various parts of the coil including between the coil and coil and earthing.

1

2. Low loss: Magnetic flux leakage calculation and corresponding measures to effectively reduce the stray loss, and in the meantime effectively prevent local overheating and lower temperature rise of winding hot spots. The electromagnetic optimizing design software is applied to optimize the core and winding design.

2

3. High resistance to short-circuit capacity: Apply transformer resistance to short-circuit capacity accounting software to design HV winding and LV winding. HV winding will be designed as central outlet, up and down parallel connection with axial oil path; the regulating winding will be designed as central outlet in the middle of HV winding with up and down parallel connection to improve transformer short-circuit resistance.

3

4. Low partial discharge, extend transformer service life.

(1) Analyze calculation of electric field to improve the electric field concentrated region.

(2) The way of vacuum oil filling will effectively prevent the formation of air bubbles inside the transformer and insulation parts to reduce partial discharge.

4

5. Low noise: Lower the noise level by choosing high quality steel core material; right flux density and the self-vibration frequency of the core; application of high resistance to short-circuit of the body structure; and improving the connection method of tank and active part.

6. Low temperature rise: Apply reasonable oil flow distribution structure by calculation of oil flow distribution; reduce the winding hot spot temperature rise and the average temperature rise in order to increase overload capacity of each part, extend the life of transformer.



Part III: Product Main Parameter

Rated Capacity

(kV*A)

Model

Rated Voltage (kV)

Vector Group

No load loss (kW)

Load loss

(kW)

No load current (%)

Short-circuit impedance (%)

H.V

L.V

31 500

S11-31500/220

220±2x2.5%

242±2x2.5%

63.

6.6

10.5

YNd11

28.0

128

0.56

12 ~ 14

40 000

S11-40000/220

32.0

149

0.56

50 000

S11-50000/220

39.0

179

0.52

63 000

S11-63000/220

46.0

209

0.52

75 000

S11-75000/220

10.5

13.8

53.0

237

0.48

90 000

S11-90000/220

61.0

273

0.44

120 000

S11-120000/220

75.0

338

0.44

150 000

S11-150000/220

10.5

13.8

15.75

18

20

89.0

400

0.40

160 000

S11-160000/220

93.0

420

0.39

180 000

S11-180000/220

102

459

0.36

240 000

S11-240000/220

128

538

0.33

300 000

S11-300000/220

15.75

18

20

151

641

0.30

360 000

S11-360000/220

173

735

0.30

370 000

S11-370000/220

176

750

0.30

400 000

S11-400000/220

187

795

0.28

420 000

S11-420000/220

193

824

0.28



Part IV: Outline Drawing

220kV





Hangzhou Qiantang River Electric Group Co., Ltd.(QRE)

 

Hangzhou Qiantang River Electric Group Co., Ltd (Abbr.: QRE) is one of the leading manufacturer of Power Transformer & distribution Transformer in China. With more than 43 years experience in this field, QRE constantly focus on transformer.

It's main products include: oil immersed transformer with capacity up to 250MVA/400 kV, Cast resin transformers, compact Substation and components. This enterprise accomplished turnover about USD350 million in 2018.

Depends on it's high quality, short delivery time and competitive price, QRE becomes one of the famous brand over world. during past years, more than 500 oversea projects were completed in 62 different countries. Such as Germany, Italy, Iceland, Nigeria, India.

Company Info

  • Company Name: Hangzhou Qiantang River Electric Group Co., Ltd.(QRE)
  • Representative: Xiang zhongxiao
  • Product/Service: Power Transformer , Cast Resin Transformer , Dry type Transformer , Compact substation , transformer upgrade , transformer mornitoring
  • Capital (Million US $): 1080000000RMB
  • Year Established: 1976
  • Total Annual Sales Volume (Million US $): Above US$100 Million
  • Export Percentage: 1% - 10%
  • Total Annual Purchase Volume (Million US $): US$10 Million - US$50 Million
  • No. of Production Lines: >20
  • No. of R&D Staff: Above 100 People
  • No. of QC Staff: Above 100 People
  • OEM Services Provided: yes
  • Factory Size (Sq.meters): Above 100,000 square meters
  • Factory Location: Qiantang River Electric Science & Technology Industrial Zone,Xiaoshan District,Hangzhou city-311243,P.R.China.
  • Contact Person: Mr. James
  • Tel: 86-0571-82583721
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