DC Rectiformers in single and parallel New graphite material project 12 phase rectifier cabinet
1, Adaptive conditions and performance indexes of rectifier
1. Application scope and basis
The application scope of this technical scheme is limited to 30000t / year new graphitized material engineering rectifier.Including technical specifications for functional design, structure, performance, installation and test of rectifier unit body and supporting equipment meeting the requirements of the project.
The standards and technical requirements on which the technical scheme is based are based on national GB and international IEC standards and the latest in the industry
New standard JB and user technical specification for DC rectifier (1).
2. Basic design electrical conditions
2.1 rated condition of single unit rectifier:
DC voltage: udn = 40-200v
DC current: IDN = 2×60KA
2.2 overall configuration:
The single unit 120ka consists of one on load voltage regulating rectifier transformer with two diode rectifiers. Each diode rectifier outputs DC current of 60kA and DC voltage of 40-200v. Each diode rectifier is 6-phase rectifier. The two rectifiers are connected in parallel to form equivalent 12 pulse wave and output DC current of 2×60kA, DC voltage 40-200v
Or a single unit 120ka consists of an on load voltage regulating rectifier transformer with a diode rectifier, with an output DC current of 120ka and a DC voltage of 40-200v.
Single unit 12 pulse, two units in parallel to form a 24 pulse rectifier system.
2.3 the rectifier line adopts double inverse star with balance reactor, which is fixed inside.
2.4 electrical conditions for normal use
2.4.1 power supply voltage: 20kV ± 5%
2.4.2 frequency: 50Hz ± 0.5
2.4.3 number of phases: 3
2.4.4 power supply: AC380 / 220V ± 5%
2.4.5 control protection: AC220V ± 5% or dc220v
Frequency: 50Hz ± 0.4
3. Cooling of rectifier:
3.1 cooling method: use deionized high-purity water for cooling.
3.2 layout of cooling water circuit: the main manifold of component cooling water circuit is located at the bottom of rectifier cabinet and adopts pure water cooling mode.
3.3 cooling water circuit materials: the cooling water pipe, nozzle and flange of rectifier cabinet are made of stainless steel or PVC materials, and the water pipe
Selection of high quality anti-aging, corrosion resistant hose.The pressure and temperature measuring points are installed in the middle of the manifold and in the pure
Thermal resistance for centralized monitoring (installed in rectifier cabinet) shall be set at the water outlet pipe.
3.4 pressure of cooling circulating water: the water pressure shall not be less than 0.10MPa and 0.15Mpa in normal operation.
4. Installation method:
The rectifier device is fixed indoors, located on both sides of the rectifier transformer and directly grounded.
5. Application: graphitized products.
6. Natural conditions:
Rectifier room absolute air temperatureat maximum site ambient °C 50
Pollution level: Grade III
| Ser.No. |
Description |
Unit |
Design |
Seller |
| |
| Item 1 |
Auto-Regulation / Rectifier Transformer
Combination |
|
| 1 |
Supply voltage |
V |
20,000 |
20,000 |
| 2 |
Frequency |
Hz |
50 |
50 |
| 3 |
Maximum short-circuit power |
MVA |
866 |
866 |
| |
Auto-Regulation Transformer: |
|
| 4 |
Number of transformers |
pc. |
2 |
2 |
| 5 |
Throughput rating per unit |
MVA |
|
28 (+20%) |
| 6 |
Vector group |
- - |
|
D(+7.5°)/y11
; D(-7.5°)/y11 |
| 7 |
Short circuit impedance |
% |
|
4- 6 |
8 |
Tap charger operation |
- - |
motor
operation |
motor
operation |
| 9 |
On-load tap charger positions |
- - |
70 positions |
71 Pos.
(MR Tap-changer) |
| 10 |
OLTC tap step |
V DC |
2.3 |
2.33
(with saturable reactor ) |
| 11 |
Off circuit tapping switch |
- - |
3 positions |
N.A |
| |
Rectifier Transformer: |
(with IPT and Saturated Reactor) |
12 |
Primary voltage |
V |
adapted to output of step-down
transformer |
adapted to output of step-down
transformer |
| 13 |
Primary rating per unit at max secondary voltage |
MVA |
|
28 |
| 14 |
Secondary rating per unit at max secondary voltage |
MVA |
|
396 |
| 15 |
Maximum secondary voltage, at no load |
V |
|
330 V (A.C)
200 V(DC) |
| 16 |
Minimum secondary voltage, at no load |
V |
|
69.8 V (AC)
40 V(DC) |
| 17 |
Short circuit impedance |
% |
|
6-7 |
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7. 110KV on-load regulating rectifier transformer in chemical industry
8. Strong oil-water cooling rectifier transformer
Technical data sheet:
PRODUCTION FACILITY
REFERENCE PROJECT:
Company Introduction
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facilities.
It specially produces large scale power transformer and industrial transformers of high quality and reliability. A large
share of its resources are devoted to research and development of industrial and special transformers and reactors for
any special application,such as the iron and steel and electrometallurgical industries.The company main working is
suppling,engineering,designing,manufacturing, executing, and commissioning for transformer .
Why Choose Us
FIRST-CLASS PROCESSING AND TEST EQUIPMENT
We have more than 500 sets of sophisticated, advance production and test equipments, complete and perfect processing equipments, and
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center, undertakes the quality inspection of the industry in our province, this is a solid guarantee for our excellent product quality.
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We are confident that good products come from good personnel, and good environment makes qualified personnel. The company is
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