Product Overview
The high-voltage variable-frequency power supply is a core auxiliary device for power transformer test stations. It is often used in conjunction with the NPTTS-HC series containerized reactive power compensation capacitor banks to provide stable power supply and reactive power compensation support for various transformer tests. The NPTTS-HC series capacitor banks can achieve large-capacity reactive power compensation through Y/Δ switching, effectively reducing the power supply capacity requirements for load testing. The high-voltage variable-frequency power supply can output low-distortion standard sine waves with adjustable frequency and voltage, and both devices support customized parameter settings.
This high-voltage variable-frequency power supply allows flexible adjustment of output voltage and frequency, features a compact structure and convenient operation, and can replace traditional generator sets. It is widely used in various high-voltage transformer testing scenarios. The entire equipment set is specifically designed for transformer load testing, paired with a containerized reactive power compensation unit, supporting flexible expansion and precise voltage and frequency regulation, thereby creating a stable and efficient customized testing power supply solution.
Working Principle
After connecting to the mains power, the high-voltage variable-frequency power supply continuously adjusts output voltage and frequency according to test requirements, delivering standard low-distortion sine waves to provide compliant power for transformer testing.
When paired with the NPTTS-HC containerized reactive power compensation capacitor bank, Y/Δ mode switching enables large-capacity reactive power compensation, reducing reactive power losses on the load side and lowering the main power supply burden.
The entire system operates in coordination, ensuring stable power supply and standardized waveforms throughout the testing process, meeting the testing requirements of transformers with different specifications. Equipment parameters can be adjusted as needed to suit specific operating conditions.
Core Technical Parameters of the Equipment
Power supply voltage and frequency: Three-phase 10kV ±10%; 50Hz ±5Hz, with support for custom settings.
Rated capacity: 1000kVA, 2000kVA, 3000kVA, 4000kVA, 5000kVA, with support for customization.
Rated output voltage: Line voltage 0–10.5 kV, continuously adjustable, with support for customization.
Output mode: Delta connection, compatible with both three-phase and single-phase operation.
Three-phase phase shift: <120° ±0.01°.
Three-phase output symmetry: Unbalance in line voltages ≤1%.
Output waveform: Standard sine wave.
Output waveform distortion: ≤3.0%.
Output voltage instability: ≤1.0%; adjustable output frequency range: 45Hz–200Hz.
Output frequency adjustment sensitivity: 0.1Hz.
Output frequency instability: ≤0.005%.
Cooling method: Forced air cooling.
Noise level: <70dB.
Partial discharge: <10pC.
Core Advantages and Selling Points
Strong reactive power compensation capability: Paired with the NPTTS-HC compensation capacitor bank, Y/Δ switching achieves large-capacity reactive power compensation, reducing the need for additional power supply capacity.
Flexible voltage and frequency regulation: Wide-range adjustable output voltage and frequency, suitable for non-standard voltage and frequency testing scenarios.
Excellent waveform quality: Standard sine wave output with minimal waveform distortion, ensuring accurate and reliable test data.
Replacement for traditional units: Compact size and easy operation make it an ideal substitute for conventional generator sets.
Stable and reliable operation: Minimal voltage and frequency fluctuations, balanced three-phase output, and stable performance over extended periods.
Low noise and easy maintenance: Uses forced air cooling, keeping operating noise below 70dB and ensuring environmentally friendly use.
Modular and expandable: Supports flexible expansion, allowing personalized customization of capacity and parameters.
Quick mobile deployment: Containerized integrated design enables rapid installation, making it well-suited for outdoor and mobile testing scenarios.
Target Customer Groups
Transformer manufacturers worldwide, third-party transformer inspection and certification agencies, power engineering service providers, test station construction entities, and parties undertaking upgrades of outdated testing equipment.
Application Scenarios (expanding long-tail keywords to improve Google rankings)
Transformer manufacturers: Large-capacity load testing, no-load and load loss testing.
Certification and testing agencies: Transformer type tests, standard performance evaluations.
Outdoor or temporary testing sites: Mobile load testing under conditions without access to high-power grids.
Test station infrastructure development: Power supply and reactive power compensation for containerized outdoor temporary test stations.
New energy and foreign trade sectors: Specialized testing of exported transformers with non-standard frequencies and voltages.
Equipment upgrade and retrofitting: Upgrading old test power supplies, optimizing power configurations, and reducing capacity requirements.
Solving Industry Pain Points
Addresses the issue of high reactive power consumption during transformer load testing and the relatively high procurement and construction costs of test power supplies.
Improves upon traditional test power supplies with fixed voltage and frequency and non-standard waveforms, which lead to deviations in test data.
Overcomes challenges related to insufficient power supply and unstable voltage at outdoor sites, making it difficult to conduct large-capacity transformer load tests.
Eliminates the drawback of limited equipment versatility by supporting customized adjustments to meet the testing needs of transformers with different specifications.
Optimizes the issues of bulky traditional equipment, difficult transportation, and lengthy deployment cycles; containerized models enable rapid commissioning.
Core Product Value
This combined system of high-voltage variable-frequency power supply and reactive power compensation for transformer test stations can significantly reduce the configuration costs and infrastructure investment required for test power supplies. Its precise voltage and frequency regulation, along with low-distortion output characteristics, ensures accurate and compliant test results, helping products pass various international inspections and certifications.
With strong versatility and support for customization, a single unit can adapt to multiple types and specifications of transformer testing, improving equipment utilization. The containerized design balances transportation and outdoor operational needs, shortening project deployment timelines while assisting enterprises in upgrading aging test stations, thereby comprehensively enhancing overall efficiency in the testing process.
Frequently Asked Questions (FAQ)
Q1: What other equipment is this system typically used with, and what are its functions?
A: Primarily serves as auxiliary equipment for transformer test stations, working in tandem with the NPTTS-HC series containerized reactive power compensation capacitor banks. Together, they handle power supply and reactive power compensation, reducing the load on the main power source.
Q2: Can the voltage and frequency of the high-voltage variable-frequency power supply be adjusted?
A: Yes, adjustment is supported. Output voltage can be continuously regulated from 0 to 10.5kV, and frequency can be adjusted within the range of 45Hz to 200Hz, with high precision to meet non-standard testing requirements.
Q3: Does the equipment support customization?
A: Yes, rated capacity, output parameters, structural forms, and other aspects can all be individually customized according to site conditions and testing requirements.
Q4: Can it be used for outdoor and mobile transformer testing?
A: Yes, the entire system adopts a containerized design, offering convenient deployment and flexible mobility, making it suitable for outdoor and temporary testing scenarios without fixed high-power grids.
Q5: How is the equipment’s operational status and waveform performance?
A: The output is a standard sine wave, with waveform distortion ≤3.0%, balanced three-phase output, high stability in voltage and frequency, and excellent performance in partial discharge and noise indicators.
