Have you ever been troubled by the inability to obtain a stable high-voltage direct current source during testing of zinc oxide lightning arresters? Or is data distortion caused by voltage fluctuations during cable withstand voltage testing? The terminator of these troubles is today's protagonist - the DC high-voltage pulse generator. As the core equipment of modern power testing, it is like the "energy heart" of a laboratory, providing precise and controllable energy pulses for various high-voltage experiments.

1、 Core definition: What is a DC high-voltage pulse generator?

АDC high-voltage pulse generator is a high-voltage testing equipment based on pulse width modulation (PWM) technology. It converts ordinary AC power into high-voltage DC power through a high-frequency voltage doubling circuit, and achieves full range smooth voltage regulation and stable output.

Compared to traditional power sources, it has three unique advantages:

High stability: The output voltage stability can reach 0.5%, avoiding voltage drift during the experimental process

Intelligent protection: Built in multiple safety mechanisms such as overvoltage protection and current limitation

Wide range adjustment: continuously adjustable from kilovolts to hundreds of kilovolts

Especially in the leakage current testing of zinc oxide lightning arresters, its precise DC output characteristics have become an irreplaceable detection method.

2、 Experimental scenario: Why is it said to be indispensable?

1. The "ruler" for safety testing of power equipment

In the preventive testing of electricity, a DC high-voltage generator is used for:

DC voltage withstand test of power cables

Measurement of insulation resistance of transformers

Accurate measurement of leakage current of lightning arrester

By applying stable high voltage, early insulation defects of equipment can be effectively detected, avoiding breakdown accidents during operation.

2. The "energy engine" of scientific research and innovation

In the field of scientific research, it empowers various cutting-edge experiments:

Research on the electrical properties of materials (such as testing the dielectric properties of nano insulating materials)

Construction of primary electric field for particle accelerator

Simulation of special environments such as electrostatic precipitator and plasma generation

A university laboratory successfully conducted research on the breakdown characteristics of a new insulation material using the ZGF series generator from Wuhan Ultra High Voltage Power Technology Co., Ltd., increasing experimental efficiency by 40%.

3、 Performance influencing factors: analysis of key parameters

The accuracy of experimental results depends on the three core performance of the equipment:

Voltage stability: affects measurement repeatability, high-quality equipment can reach ± 0.2%

Ripple factor: The lower the better (<1%), to avoid interference with leakage current measurement

Response time: determines the accuracy of boost rate control and relates to the accuracy of partial discharge detection

It is worth noting that environmental factors are equally crucial. When the humidity exceeds 75%, even equipment using moisture-proof insulation materials may generate surface leakage current, leading to data deviation.

4、 Professional application skills: How to use this "high-pressure sword" well?

1. Golden Rule of Safe Operation

Grounding first: Before use, it is necessary to ensure that the equipment is reliably grounded

Zero start: Boost voltage from zero using a potentiometer

Step by step discharge: After the experiment, a dedicated discharge rod is used to gradually discharge

2. Secret to Accurate Measurement

When conducting tests on zinc oxide lightning arresters:

The preset voltage is 80% -90% of the rated voltage of the lightning arrester

Using microampere direct measurement method

Record the curve of leakage current over time

This method can accurately determine the degree of aging of MOA valve plates.

3. Equipment combination scheme

Modern experiments often adopt a multi machine collaborative working mode:

graph LR

A [DC High Voltage Generator] -->B [Partial Discharge Testing System]

A -->C [Cable Fault Locator]

A -->D [Transformer Comprehensive Tester]

For example, the series resonance test device of Wuhan Ultra High Voltage Power Technology Co., Ltd., when used in conjunction with a DC high-voltage generator, can complete the entire process of testing from cable withstand voltage testing to fault location.

5、 Equipment Selection Guide: Key Considerations

When choosing a DC high-voltage generator, attention should be paid to:

-* * Application scenario * *: Basic type is selected for power preventive testing, and a wide range of adjustable models are needed for scientific research

-* * Extended Features * *: Does it support remote control and data recording

-* * Safety Design * *: Check if it is equipped with folding support feet and dual overvoltage protection

-* * Brand Services * *: Select manufacturers that provide professional technical support

**The ZGF series of Wuhan Ultra High Voltage Power Technology Co., Ltd. adopts pulse width modulation technology for optimized design. Its intelligent overvoltage protection module can accurately set the protection threshold to avoid experimental errors caused by misoperation.

6、 Maintenance and Innovation: The Secret to Extending Equipment Lifespan

Regular maintenance is the key to ensuring equipment accuracy. Suggested after every 500 hours of operation:

1. Replace hydraulic oil

2. Clean the filter

3. Check the status of the double pressure cylinder silicon stack

The current technological frontier has shown a trend of intelligent upgrading. New generator equipped with:

-Automatic temperature compensation system

-Wireless monitoring module

-AI fault pre diagnosis function

These innovations have significantly improved the reliability and experimental efficiency of the equipment.

frequently asked questions

**Q1: What is the main difference between a DC high-voltage generator and an AC high-voltage generator? **

A: DC generator output * * constant unidirectional current * *, suitable for insulation resistance testing and electrolysis effect experiments; The AC generator outputs sine waves, which are closer to the actual operating conditions of the equipment and are commonly used for * * dielectric loss testing * * and * * partial discharge * * detection.

**Q2: How to deal with abnormal discharge sound when using the device? **

A: Immediately reduce voltage and cut off power, check for poor contact or contaminated insulation surfaces at the high-voltage connection points. If unable to rule it out on your own, it is recommended to contact the technical support team of professional manufacturers such as Wuhan Ultra High Voltage Power Technology Co., Ltd.

**Q3: Can I modify the equipment myself to increase the output voltage? **

A: Absolutely prohibited! Unauthorized modification of the voltage doubling circuit may damage the insulation coordination design of the equipment, leading to the failure of overvoltage protection and causing serious accidents.

**Q4: Why is it necessary to use DC high voltage for testing zinc oxide lightning arresters? **

A: Under DC voltage, the resistive leakage current component can be accurately measured, which directly reflects the degree of deterioration of the lightning arrester valve plate. However, AC testing may mix in capacitive current, interfering with the judgment.

**Q5: What should be noted when using equipment in cold environments? **

A: Preheat the control box for 30 minutes in advance in environments below -10 ℃, and use hydraulic oil with good low-temperature characteristics to avoid parameter drift in the pulse width modulation technology circuit due to low temperature.