Overview

Voltage control reactive power The product is mainly suitable for various levels of substations with voltage levels of 6KV-220KV, installed on the 6KV/10KV/35KV busbars of substations. The product is widely used in industries such as power systems, metallurgy, coal, and petrochemicals to improve voltage quality, increase power factor, and reduce line losses.

Model number and its meaning

product-781-273

Use environmental conditions

1. Environmental temperature: -20 ℃~+45 ℃

2. Relative humidity: ≤ 90% (25 ℃)

3. Altitude: ≤ 1000m

4. Earthquake intensity: Ground horizontal acceleration 0.25g, vertical acceleration 0.125g

5. Installation location: indoors or outdoors, the horizontal inclination of the installation location should not exceed 5 degrees from the vertical plane, and there should be no severe mechanical vibration at the installation and operation location. No harmful gases and vapors, no conductive or explosive dust.

Advantages of the device

1. Compared with the switching type, only one set of capacitors can be fixedly connected to achieve nine levels of output, with high compensation accuracy and can meet the requirements of reactive power changes in the system.

2. Adopting a loaded self coupling voltage regulator for voltage regulation, the regulation speed is fast, and real-time automatic adjustment can be achieved, with significant compensation effect;

3. Can be closed at low voltage, greatly reducing the closing surge current and effectively reducing the impact on the system and capacitors;

4. Compared with switching, it can ensure that the capacitor operates below the rated voltage for a long time without switching overvoltage and inrush current problems, greatly extending the service life of the capacitor;

5. The device has a high degree of automation, with complete protection functions, digital communication, and remote maintenance functions, which can meet the needs of unmanned and maintenance free operation;

6. The additional loss is small, only about 2% of the capacitor capacity, equivalent to one tenth of the SVC loss;

7. Capacitors do not require grouping for switching, reducing equipment such as switching switches and footprint, and saving infrastructure investment costs;

8. The device does not generate harmonics and will not cause harmonic pollution to the system;

9. When there is a series reactor, it can ensure that the reactance rate of each gear is constant and unchanged;

Main technical parameters

Main parameters of voltage regulator

1. Rated voltage: 6.3 kV, 10.5 kV, 38.5kV

2. Capacity: 6.3kV (300-4000kvar), 10.5kV (300-7500kvar), 38.5kV (2000-25000kvar)

3. Output voltage: Ue Uex (0-8) x6.25%

4. Adjustable capacitor reactive power output: Qce * (100-25%)

5. Voltage regulation method: On load voltage regulation, according to the principle of ensuring voltage output requirements and minimizing transformer load losses, appropriate on load tap changers can be selected based on the manufacturing level of domestic on load tap changers, and end voltage regulation can be used,

6. Group: Y, a0

7. Loss: ≤ 1.2% x capacitor capacity

8. Impedance: less than 2.0% (converted to electromagnetic capacity)

9. Pollution level: I, the creepage distance of the outgoing conduit shall not be less than 31.5mm/kV

10. Cooling method: oil immersed self cooling

11. Transformer oil: 25 # (or 45 #) domestic oil

12. Temperature rise limit: According to the requirements of GB1094.2 standard.

product-680-702