In the field of power equipment manufacturing, lightning impulse voltage generators are the core equipment for testing the insulation performance of equipment, and their quality directly affects product quality and grid safety. Wuhan UHV Power Technology Co., Ltd. has been deeply involved in the field of high-voltage electrical measurement for nearly 22 years, exploring the underlying reasons why its UHV series lightning impulse voltage generator test device has won the trust of many power equipment manufacturers.
Technology oriented: From Manufacturing to the Hardcore Strength of "Intelligent Manufacturing"
At the core technology level, the lightning impulse voltage generator of Wuhan UHV adopts a multi-stage Marx circuit design, combined with high-performance pulse capacitors and low inductance ball gap switches, which can accurately output standard lightning impulse and operational impulse voltage waveforms. Its independently developed intelligent closed-loop control technology enables a charging voltage feedback accuracy of up to 0.5%, coupled with a 1GS/s high-speed sampling system, enabling microsecond level fault location. The voltage fluctuation rate of the equipment is below 0.1%, far exceeding the national standard requirements.
In terms of key parameters, taking the UHV-600kV/45kJ lightning impulse voltage generator as an example, the equipment adopts an epoxy pillar tower structure with a rated voltage of 150 kV and a nominal energy of 45kJ. It can output standard impulse waveforms such as lightning full wave, truncated wave, and operating wave. When the load capacitance is below 2000PF, the voltage utilization coefficient of standard lightning waves is ≥ 90%; When the load capacitance is below 4000PF, the voltage utilization coefficient is ≥ 85%. The use of a truncation device can generate lightning intercepts with a truncation time of 2-6 μ s, and the dispersion of the intercepts is less than 100ns. Equipment brackets, DC charging units, etc. have scalability and can be extended to 1000kV levels.
Quality based: Strict control creates a reliable choice
For power equipment manufacturers, the long-term stability and reliability of the equipment are crucial. Wuhan UHV has established a strict full process quality control system, from the import and procurement of core components to the aging testing of the entire machine, each link undergoes dozens of precision testing processes. Its products have not only passed ISO international quality system certification, but also obtained multiple national authoritative testing certifications, such as CNAS laboratory certification, becoming a designated cooperative brand of the National Electric Power Research Institute.
In terms of extreme environmental adaptability, Wuhan UHV equipment also performs well. The device supports wide temperature operation from -30 ℃ to 50 ℃, and has passed environmental testing from -20 ℃ to 50 ℃. The dustproof and waterproof rating of the shell reaches IP65. In the Qinghai Tibet Plateau project, the equipment worked continuously for 12 hours without failure in a low oxygen environment, overcoming extreme working conditions such as high altitude and strong electromagnetic interference.
Practical verification: National level major projects create a golden reputation
The true touchstone of equipment quality comes from practical experience. The lightning impulse voltage generator of Wuhan UHV has been widely used in multiple industries such as power, metallurgy, petroleum, and chemical, and has participated in numerous national key projects.
In the Zhoushan 500kV flexible straight project, the Wuhan UHV equipment successfully completed the world's first 500kV submarine cable lightning impulse withstand test, with a data error rate lower than 40% of the national standard. In the power supply project of the Sichuan Tibet Railway, the equipment successfully completed the impact test at an altitude of 4500 meters, and the data consistency was certified by the expert group. In addition, its key technology has been successfully applied to high-voltage compaction testing equipment such as the "7500kV/750kJ impulse voltage generator" at the Wuhan UHV Test Base, the "7200kV/720kJ impulse voltage generator" at the South Grid Kunming Ultra High Voltage Base, and the "4000kV/200kJ impulse voltage generator" at the China Electric Power Research Institute.
The company also holds multiple core technology patents, including the patented technology of "shock generator charging resistor spring isolation switch" jointly developed with universities, which overcomes the problem of synchronous opening and closing of high potential long stroke switches and achieves efficient wide range wavefront time output.
Intelligent empowerment: Fully automatic control system improves test efficiency
Modern power equipment manufacturing has put forward higher requirements for testing efficiency. The UHV series lightning impulse voltage generator of Wuhan UHV is equipped with Siemens PLC fully automatic control system, supporting constant current voltage regulation, ball distance automatic tracking, and continuous cycle testing. The device has automatic charging, triggering, waveform acquisition and analysis functions, and operates automatically throughout the entire process. The equipment is equipped with a weak damping capacitor voltage divider and a high-speed oscilloscope, and comes with professional analysis software that can automatically analyze waveform parameters and generate test reports. The intelligent control system it is equipped with can also generate IEC standard testing reports with just one click, greatly reducing manual operation time and improving work efficiency.
In terms of modular design, the device adopts a 4-stage tower modular design, supporting single-stage low-voltage testing and multi-stage parallel expansion. The entire machine is mostly mobile. Modular design reduces the size of equipment by 40% compared to traditional devices, making it easier to transport and use in special scenarios.
Service escort: Comprehensive guarantee ensures manufacturers have no worries
For power equipment manufacturers, after-sales service is also a key consideration in procurement decisions. Wuhan UHV has always adhered to the principle of "customer first" and has completed over 5000 on-site technical supports. Its service network not only covers China, but also radiates to more than 30 countries around the world.
At the same time, the company can also provide customized solutions for special scenarios and needs, such as ultra small modular products designed for special scenarios such as mountainous substations, offshore wind power platforms, and northwest photovoltaic bases.
From technology research and development to production and manufacturing, from quality control to after-sales service, Wuhan UHV has been deeply rooted in 22 years of craftsmanship, providing a complete solution from equipment selection to long-term operation and maintenance for power equipment manufacturers. As an industry expert said, "In the field of lightning impulse voltage generators, Wuhan UHV is no longer just an equipment supplier, but also a trusted technical partner for power equipment manufacturers