Dynamic Voltage Restorer

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1. Introduction

The prime function of dynamic voltage restorer (DVR) is to reduce the voltage sags on power lines that supply power to sensitive equipments. The DVR is principally accountable for restoring the quality of voltage supplied to the end-user in case the voltage from the supply is not suitable to be used for sensitive devices. DVR allow consumers to isolate and protect devices from disturbances developed by sags and swells on the distribution network or power lines. Additionally, DVRs can also be used to address the trouble of harmonics generated by non-linear load in manufacturing machinery setup.

Image Fig.1 Dynamic electricity quality problems wave sketch Image

1. Technical Data

1. Input voltage: 3Ф380V±20% (3 phase 4 lines)(permitted short drop 50%);
2. Input frequency: 40-70Hz;
3. Output voltage: 3Ф380V±5%(setting0);
4. Voltage stablity accuracy: ±1%;
5. Main control part:IGBT;
6. Compensated mode: MPWM, inverter compensation (inverter inside);
7. Compensated time: ≤2ms;
8. Harmonic wave compensated voltage: THD≤2%;
9. Voltage adjustable mode: 3 phase adjusting respectively, 3 phase auto balance;
10. Harmonic wave resistance: Able to work under serious wave distortion;
11. Sharp peek resistance: Input 4000V single pulse, output less than 40V;
12. Wave filter: 0.15M—10M, differential mode 70—100dB, common mode 100dB.

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2. Working principle

Cascade a compensated transformer between power supply and load,primary coil of the transformer could provide compensated voltage with same frequency,phase lock,voltage amplitude to keep output voltage stable.
Because of the dynamic compension of the inverter,DC power could provide power to inverter,if there is flash or voltage drop of grid voltage,inverter could compensate within 1ms.
PWM is base on sin. wave,it could compensate voltage harmonic wave effectively by collecting and comparision of voltage wave and standard wave,it will make sure that output THD less than 3%.

  3. Specifications

DVR Dynamic Voltage Restorer(3 phase output)

Model

Capacity
(kVA)

Output current
(A)

Dimension  LxWxH(mm)

DVR13003

DVR33003

3

4.2

350×65670

(with wheel)

DVR13006

DVR33006

6

8.4

DVR13010

DVR33010

10

15

DVR13015

DVR33015

15

23

46701170

(with wheel)

DVR13020

DVR33020

20

30

DVR33030

30

45

DVR33045

45

68

78651450

DVR33060

60

91

DVR33075

75

114

95701600

DVR33090

90

137

DVR33120

120

183

DVR33150

150

228

120751800

DVR33200

200

304

DVR33250

250

380

140802000

DVR33300

300

456

DVR33350

350

532

1501052000

DVR33400

400

608

DVR33500

500

760

1501052000

(2 machines in a carbin)

DVR33600

600

912

DVR33800

800

1216

DVR331000

1000

1520

1501052000

(3 machines in a carbin)

DVR331200

1000

1823

DVR331400

1000

2127

1501052000

(4 machines in a carbin)

DVR331600

1000

2431

DVR331800

1000

2735

1501052000

(5 machines in a carbin)

DVR332000

1000

3038

DVR Dynamic Voltage Restorer(Single output)


DVR11-500W

0.5

2.1

425×436×173

(4U highness)

DVR11001

1

4.2

DVR11002

2

8.5

350×65670

(with wheel)

DVR11003

3

13

DVR11005

5

21

DVR11010

DVR31010

10

42

DVR11015

DVR31015

15

63

46701170

(with wheel)

DVR11020

DVR31020

20

84

DVR11030

DVR31030

30

126

DVR11045

DVR31045

45

189

78651450

DVR31060

60

252

DVR31075

75

315

95701600

DVR31090

90

378

DVR31120

120

504

120751800

DVR31150

150

630

DVR31200

200

840

140802000

DVR31300

300

1350