Technical principles and engineering application analysis of ZXBXZ series series resonant voltage withstand device

1. Introduction

In the field of high-voltage testing of power systems, traditional power frequency voltage withstand equipment is difficult to meet the high-precision testing needs of modern substation equipment due to problems such as huge volume and output waveform distortion. The ZXBXZ series series resonant voltage withstand voltage devices are based on the LC resonance principle, and can realize efficient and accurate AC voltage withstand voltage tests through intelligent frequency conversion technology, which is especially suitable for preventive tests and handover tests of primary equipment of 10kV~500kV substations. This article analyzes technical principles, system architecture, engineering selection and typical application scenarios, and provides systematic reference for technicians.

2. Key technical parameters

3. Typical engineering application solutions

110kV GIS equipment AC voltage test

Test parameters: voltage 185kV ( 1.2U  _m ), frequency 45~300Hz , time 1min

Configuration plan:

a. Select ZXBXZ-270 model, 6×45kV reactor connected in parallel

b. Frequency tuning to the test capacitor resonance point (typical value is about 70Hz )

c. Set the overcurrent protection threshold ≤100mA

4. Key technologies and fault handling on-site operation

1. Optimization of operation process

Automatic mode: Set the target voltage → Automatic frequency sweep (step 0.1Hz ) → Lock the resonance point → Boost to set value (slope ≤1kV/s )

Manual mode: You need to monitor the Q value changes to avoid frequency deviation from the resonant point and cause overcurrent (recommended use when Q value > 30 )

2. Common fault diagnosis

5. Technological innovation and industry value

1. Dry reactor technology: adopts vacuum epoxy casting technology, compared with traditional oil-immersed equipment:

40% reduction in volume and 35% reduction in weight

No oil leakage risk, suitable for mobile test scenarios

2. Intelligent protection system:

Flash protection response time <5ms

With self-diagnosis function ( IGBT temperature and cooling fan status monitoring)

3. Economic benefits:

Single device covers multi-voltage level test, shortening the return on investment cycle by 30%~50%

6. Conclusion

Through frequency conversion resonance technology and modular design, the ZXBXZ series devices solve the pain points of traditional voltage resistant equipment in terms of accuracy, efficiency and adaptability. Their technical indicators fully meet the requirements of GB/T 16927.1-2011 , DL/T 474.4-2018 and other standards. With the increase in the demand for power equipment status detection, the continuous upgrade of this series of devices in the direction of intelligence (such as remote monitoring and AI diagnosis) will further promote the innovation of high-voltage testing technology.

(Note: The formulas and parameters in the article must be corrected according to actual test conditions. Please check the equipment instructions and comply with safety regulations before operation)

 GDZX is a manufacturer of power testing equipment, offering a wide range of models and professional technical support.

Contact:+86-27-6552607/+86-17396104357.Website:https://www.highvoltage-testequipment.com/