SHXZ-810kVA/130kV Variable Frequency Series Resonance Test Device

NegotiableUpdate on 05/25

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Nature of the Manufacturer: Producers

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Overview

The device capacity is set at 810kVA/130kV, divided into ten sections of reactors, with a single section of 81kVA/27kV/3A/34H. The use of reactors in series and parallel connection can meet the test requirements of the test sample mentioned above. List of equipment usage relationships during the experiment, equipment combination, test object, reactor 81kVA/27kV, ten section excitation ..

Product Details

Details introduction:

SHXZ-810kVA/130kV transformerTechnical Scheme for Frequency Series Resonance Test Device

1. Scope of Equipment Application
1.1 Meet 630mm2/110kV cross-linked cable, 1000m long AC withstand voltage test.

2. Equipment manufacturing reference and execution standards
DL/T849.6-2004 "High Voltage Resonance Test Device"
GB 6450-1986 Dry type Power Transformers
DL/T848.2-2004 "Test Transformers"
GB/10229-1988 "Reactors"
GB/T11920-1989 General Technical Conditions for Control Devices
GB/T16927.1-1997 "High Voltage Test Techniques"
IEC358-1990 "Coupling capacitors and capacitive voltage dividers"
GB311.1 Insulation Coordination for High Voltage Transmission and Transformation Equipment
DL/T846-2004 General Technical Conditions for High Voltage Testing Equipment
Q/CSG10007-2004 "Preventive Testing Regulations for Power Equipment"
GB7328-87 "Sound Level Measurement of Transformers and Reactors"
DL474。 4-1992 "AC Voltage Endurance Test"

3. Environmental conditions for use
3.1 Surrounding air temperature:
*High temperature:+45 ℃ * Low temperature: -10 ℃;
*Large daily temperature difference: 35k Sunshine intensity: 0.1w/cm2
3.2 Altitude: ≤ 2000m;
3.3 Relative humidity: ≤ 90%
3.4 The installation and placement location should be flat, and the inclination of the reactor installation should not be less than 5 degrees0 ；
There should be no gas vapor, chemical deposition dust, dirt, or other explosive media that seriously affect the insulation of the equipment around 3.5.

4Specific equipment configuration
4.1 Test requirements:
4．1．1．630mm2/AC withstand voltage test of 110kV cross-linked cable, length 1000m, equivalent capacitance 0.188uF, test voltage 128kV, test frequency 30-300Hz, test time 60min.

4.2 Design of Reactor:
4．2．1．630mm2/AC withstand voltage test of 110kV cross-linked cable, length 1000m, equivalent capacitance 0.188uF, test voltage 128kV, test frequency 30-300Hz, test time 60min. When the frequency is 35Hz.
Test current I=ω CXUtry=2×3.14×35×0.188×128×10-3=5.3A
Corresponding inductance of reactor L=1/ω2C = 110H

4.3 Configuration of Reactor:
4.3.1. Make 630mm2/110kV cross-linked cable AC withstand voltage test, with a test voltage of 128kV. Considering the compatibility of the equipment and the weight of a single unit, the reactor is divided into six sections, with each section having a voltage of 45KV, a current of 3A, and an inductance of 70H.
4.3.2. Three series and two parallel reactors, rated voltage 135KV, rated current 6A, inductance 105H, meeting 630mm requirements2/Requirements for AC withstand voltage test of 110kV cable with a length of 1000m.
verification：
1) 630mm2/AC withstand voltage test of 110kV cross-linked cable, length 1000m, equivalent capacitance 0.188uF, test voltage 128kV, test frequency 30-300Hz, test time 60min. Three series and three parallel reactors are used, with a rated inductance of 105H, a rated capacitance of 0.188uF, a rated voltage of 135kV, and a rated voltage of 6A.
Test frequency: f=1/2 π√ LC=35.8Hz
Test current I=ω CXUtry=2×3.14×35.8×0.188×128×10-3=5.4A

4.5 Configuration of Excitation Transformer
4.5.1. Since the quality factor Q value is not less than 35 at rated load, the excitation transformer has a total capacity of 810kVA for the reactor, divided by the quality factor of 30 to obtain 27.6kVA, which is 30kVA.
4.5.2. The specifications of the excitation transformer configured are 30kVA/2.5kV/5kV.

4.6 Configuration of FM power supply:
4.6.1. The capacity of the frequency modulation power supply is equal to or greater than the capacity of the excitation transformer, which is 30kVA.
4.6.2. The specification of the configured frequency modulation power supply is 30kVA.

4.7 Configuration of capacitive voltage divider
4.7.1. As the output voltage of the equipment is 128kV, the voltage of the capacitive voltage divider is 130kV and the capacitance is 1000PF.

4.7.2. Configure one capacitor voltage divider with a specification of 130kV/0.001uF.