Marx Generator empowers power detection with Goldhome lightning impulse voltage generator
In the field of insulation performance testing for high-voltage electrical equipment, the Marx Generator serves as the core technological backbone. Utilizing a "cascading" operating principle involving multi-stage capacitor parallel charging and series discharging, it achieves instantaneous voltage multiplication from low to high levels. This enables simulation of transient overvoltages generated by natural lightning strikes and internal power system operations, providing the essential driving force for equipment insulation withstand testing. The HMCJ series lightning impulse generator developed by Wuhan Goldhome Hipot Electrical Co., Ltd. adopts Marx Generator technology as its core architecture. It represents a specialized, customized extension of the Marx Generator for power testing applications. The relationship between the two is one of "core technology and application product"-Goldhome Hipot's lightning impulse generator fully relies on the working principle of the Marx Generator. Building upon this foundation, it optimizes circuit design, enhances functional configurations, and adapts to the practical scenarios of power equipment testing. Detailed analysis follows with specific parameter data.
First, clarify their core relationship: The Marx Generator is a universal high-voltage pulse generation technology, primarily converting low-voltage DC energy into high-voltage pulse energy. Its core components include charging units, multi-stage capacitor banks, and triggering systems. The Goldhome HMCJ series lightning impulse generator, based on Marx Generator technology, is an integrated specialized testing device developed to meet the lightning impulse testing requirements of power equipment (such as disc insulators, transformers, switchgear, etc.). It represents the concrete application of Marx Generator technology in the power testing field, retaining its core operating principles while meeting industry standards and field testing requirements through parameter optimization and functional upgrades. It is a specialized derivative product of the Marx Generator.
Example:
The Goldhome HMCJ Series Lightning Impulse Generator (using model HMCJ-1800kV/180kJ as an example) leverages core Marx Generator technology to achieve industry-leading performance across all parameters, precisely matching the surge testing requirements of power equipment. Key core parameters are as follows:
Core Electrical Parameters:
Rated nominal voltage: ±1800kV
Rated energy: 180kJ (20kJ/stage)
Features a 9-stage Marx circuit design with each stage charging voltage of ±200kV. with a main capacitance of 1.0μF (200kV) per stage. This design perfectly aligns with the Marx Generator's core principle of "multi-stage series connection and energy multiplication." The theoretical output voltage can reach the sum of the charging voltages across all stages, achieving a high actual voltage utilization coefficient. Lightning wave efficiency is no less than 85%, and operating wave efficiency is no less than 80%, significantly exceeding industry averages.
Waveform parameters are precisely controllable, fully matching the pulse waveform generation characteristics of the Marx Generator. Under a 4000pF load capacitance, it can generate standard lightning impulse full waves (rise time 1.2±30%μs, fall time 50±20%μs, overshoot <5%), standard lightning impulse chopped waveforms (rise time 1.2±30% μs, cutoff time 2–6 μs, cutoff dispersion <100 ns), and standard operating impulse full waves (rise time 250±20% μs, fall time 2500±60% μs), while also producing steep wave surge waveforms ith slopes exceeding 1000 kV/μs (suitable for composite insulators) and 2500 kV/μs (suitable for porcelain/glass insulators), meeting the testing requirements of various types of power equipment.
The supporting system parameters also demonstrate significant advantages. Equipped with an LGR-200kV/200mA charging power supply, it features a rated output voltage of ±100kV DC and a rated output current of 200mA. Utilizing thyristor modules for voltage regulation, it operates on a single-phase input voltage of 380V at a power frequency of 50/60Hz, with a power consumption of approximately 20kVA. It achieves bilateral symmetrical constant-current charging and can automatically switch charging polarity. The control and measurement system employs PLC-computer control with fiber-optic transmission and opto-isolation technology. The charging voltage adjustment range is 0~100.0kV, with an adjustment deviation ≤±1%, instability ≤±1%, and a synchronous misoperation rate below 1%. Output surge stability exceeds 99%. It is equipped with a TDS3012B high-voltage digital oscilloscope (maximum sampling rate 1.25GS/s, bandwidth 100MHz), with waveform measurement uncertainty ≤1%, ensuring precise and reliable test data.
Equipment environmental adaptation and structural parameters: Suitable for indoor scenarios at altitudes not exceeding 2000 meters, with an ambient temperature range of -10°C to 45°C, relative humidity not exceeding 90%, and seismic resistance up to magnitude 8. Its dimensions are 2800×1500×8000mm (total height), weighing approximately 2800kg. Designed for fixed installation with low loop inductance and resistive filtering measures, it generates standard surge waves under high-capacity loads, demonstrating outstanding load capacity.
Additionally, Goldhome Hipot offers derivative models like the HMCJ-100kA surge current generator, also based on Marx Generator technology. It delivers surge currents of 100kA (maximum amplitude, 8/20μs) and 50kA (maximum amplitude, 10/350μs), with waveform tolerance ≤±10%, further expanding the application scenarios of Marx Generator technology. In summary, Goldhome Hipot's lightning surge generators leverage Marx Generator technology as their core foundation. Through precise parameter design and comprehensive functional configurations, they transform general-purpose technology into specialized power testing equipment. This approach not only preserves the core advantages of Marx Generator high-voltage pulse generation but also aligns with the practical demands of domestic power operation, maintenance, and equipment testing. Consequently, these generators have become benchmark products for Marx Generator technology applications within the power sector.
