In the field of insulation testing for high-voltage power equipment, variable-frequency series resonance test systems have become essential equipment for preventive testing due to their excellent compatibility with capacitive test specimens such as cables, transformers, and GIS. Leveraging its proprietary variable-frequency resonance control technology, Wuhan Goldhome Hipot Electric Co., Ltd. has developed the HMCXZ series 108kVA/108kV variable-frequency series resonance test system.With significant advantages such as high-precision output, partial discharge-free design, and intelligent safety protection, this system provides efficient and reliable testing solutions for power users worldwide. This article will provide an in-depth analysis of the core advantages of the Goldhome 108kVA/108kV resonance test system.
1. High-Precision Output and Exceptional Waveform Quality
The primary advantage of the Goldhome 108kVA/108kV variable-frequency series resonant test system lies in its exceptional output characteristics. The equipment features a continuously adjustable output voltage range of 0–400 V and an output frequency range of 30–300 Hz, fully meeting the resonant testing requirements for various capacitive test specimens. It can operate continuously for 60 minutes under rated load, with an operating temperature range of -15°C to +45°C, making it suitable for a wide variety of harsh field environments. The system's output voltage distortion is ≤1%, and the output waveform is a sine wave, ensuring testing accuracy without the need for additional peak measurements. This high-purity sine wave output capability ensures precise excitation of the test specimen and prevents harmonic components from interfering with test results. The system employs a fully digital control loop that automatically tracks the specimen's resonance point, eliminating the impact of voltage fluctuations on test results.
2. Partial Discharge-Free Design and Ultra-Low Partial Discharge Levels
The core technological advantage of the Goldhome 108kVA/108kV Resonant Test System lies in its exceptional partial discharge control capability. At rated output voltage, the equipment's partial discharge level can be controlled to ≤5 pC, achieving industry-leading performance. This partial discharge-free design makes it particularly suitable for acceptance testing of high-value equipment such as GIS and transformers, which have strict requirements for partial discharge performance. The system utilizes imported power components as the core of its power conversion and features a well-designed electromagnetic compatibility (EMC) architecture, ensuring stable operation under various operating conditions. Key components, such as the resonant reactor, are manufactured using high-quality materials and precision winding processes. They undergo rigorous factory testing, including a 72-hour full-load temperature rise test and step voltage tests, to ensure long-term operational reliability.
3. Intelligent Safety Protection and Automatic Tuning Functions
The Goldhome Resonance Test System integrates multiple intelligent protection mechanisms, including discharge breakdown protection, overvoltage regulation protection, and output short-circuit protection. The system features powerful automatic tuning capabilities, capable of automatically scanning frequencies from 30 Hz to 300 Hz to precisely lock onto the resonance frequency, allowing users to visually monitor the tuning process.
Supports multiple test modes, including "Auto-Tuning + Manual Voltage Adjustment," "Auto-Tuning + Auto-Voltage Adjustment," and "Manual Tuning + Manual Voltage Adjustment." The recommended "Automatic Tuning + Manual Voltage Adjustment" mode not only quickly locates the resonance point but also allows manual voltage control of the testing process, balancing efficiency and safety. The system features multi-level protection, including zero-point protection, overvoltage protection, and overcurrent protection. In the event of a flashover or breakdown in the test specimen, the protection circuit responds within milliseconds to ensure the safety of both the equipment and the operator.
4. Wide Application and Global Recognition
The Goldhome 108kVA/108kV Resonant Test System is widely used for AC withstand voltage testing of high-voltage equipment such as power cables, GIS, transformers, and generators. Whether for acceptance testing of new equipment or preventive testing of operational equipment, the system provides stable and reliable testing capabilities.
Goldhome's resonant test systems have obtained ISO 9001, ISO 14001, and ISO 45001 certifications, and the products are exported to countries along the Belt and Road Initiative and to Latin America. Its HMCXZW series of partial discharge-free variable-frequency series resonant test systems has been successfully delivered to customers in Thailand's power industry for acceptance testing of the country's high-voltage equipment, receiving high praise from clients.
