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NSHBG-40.5
NSHBG-40.5 Environmentally friendly gas-insulated ring main unit
The NSHBG-40.5 40.5kV eco-friendly gas-insulated ring main unit is a flagship high-voltage equipment designed for the terminal of ultra-high voltage (UHV) distribution networks, auxiliary power supply in nuclear power plants, and ultra-large energy storage clusters. It utilizes a novel eco-friendly insulating gas (GWP value ≤5) and integrates an AI-based full-dimensional high-voltage diagnostic unit, a UHV adaptation module, and a nuclear-grade safety protection unit. The gas tank is constructed from aviation-grade aluminum alloy and employs vacuum sealing technology, balancing high voltage tolerance, lightweight design, ultra-low partial discharge, and nuclear-grade safety features. The equipment complies with the dual top standards of GB/T 11022-2022 and IEC 62271, has obtained special certification for nuclear-grade equipment, and focuses on high-end scenarios such as voltage reduction at the terminal of UHV distribution networks, auxiliary power supply in nuclear power plants, and grid connection of ultra-large energy storage clusters, achieving green, intelligent, and safe upgrades for UHV distribution networks.
Features
1. With top-notch adaptability to ultra-high voltage (UHV), the optimized high-voltage insulation structure and voltage regulation characteristics enable voltage reduction and load distribution at the end of the UHV distribution network, with voltage deviation controlled within ±0.3%, meeting the high-precision power supply requirements of the UHV grid.
2. Nuclear-grade safety redundancy, utilizing nuclear-grade sealing, insulation, and protective design, can withstand the impact of nuclear radiation environment, featuring automatic fault locking and emergency power-off functions, meeting the safety level requirements of auxiliary equipment in nuclear power plants.
3. With ultimate environmental performance, the new gas insulation arc-extinguishing performance is superior to SF₆, with a GWP value of only 0.5% of SF₆. It can be 100% recycled, purified, and reused, significantly reducing carbon emissions throughout its entire life cycle.
4. With intelligent and collaborative deep integration, equipped with an AI collaborative control module, it can deeply link with the ultra-high voltage dispatching system, nuclear power plant control platform, and energy storage cluster PCS, achieving fault self-healing, dynamic load adjustment, and power quality optimization.
Rated current range: 1600A-4000A, rated short-circuit breaking current: 31.5kA-50kA, gas tank protection level IP67, applicable ambient temperature -30℃ to +65℃, gas leakage rate ≤0.03%/year, gas tank service life ≥35 years. Supports multi-protocol compatibility such as IEC 61850-9-2 and DL/T 860, and can seamlessly interface with UHV dispatching systems and nuclear power plant DCS systems. Adopting oil-free and silent design, with operating noise ≤55 decibels and partial discharge level ≤3pC, suitable for high-end silent and precise scenarios such as nuclear power plants and supercomputing centers.
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Specification
| Serial No. | Item | PT Module | V Module | |
| Disconnecting Switch | Vacuum Circuit Breaker | Isolation/Earth Switch | ||
| 1 | Rated Voltage | 40.5 | ||
| 2 | 1min Power Frequency Withstand Voltage | 70/80 | ||
| 3 | Lightning Impulse Withstand Voltage | 185/215 | ||
| 4 | Rated Current | 630 | 630 | 630 |
| 5 | Short-Circuit Breaking Current | 20 | ||
| 6 | Short-Circuit Making Current | 50 | ||
| 7 | Short-Time Withstand Current | 20 | 20 | 20 |
| 8 | Short-Circuit Duration | 4 | 4 | 4 |
| 9 | Mechanical Life | 5000 | 10000 | 5000 |
| 10 | Gas Pressure | 0.025（20℃） | ||
| 11 | Annual Leakage Rate | ≤0.01% | ||
| 12 | Arc Extinguishing Method | Vacuum Arc Extinguishing | ||
| 13 | Protection Class | IP67/4X (Tank/Enclosure) | ||
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FAQs
Can this equipment meet the nuclear-grade safety requirements for auxiliary power supply in nuclear power plants?
Yes, it can. It has passed the special certification for nuclear-grade equipment, utilizes nuclear-grade sealing and insulation materials, and can withstand the impact of nuclear radiation on equipment performance. It features multiple fault lockout and emergency power-off functions, with a power supply continuity of 99.999%, fully meeting the safety level requirements for auxiliary power supply in nuclear power plants.
In the scenario of voltage reduction at the end of the UHV distribution network, how can the accuracy of voltage regulation be ensured?
Equipped with a high-precision voltage regulation module and a synchronous phasor measurement unit, it can track voltage changes in the UHV grid in real time, automatically adjust the voltage reduction parameters, and control the voltage deviation within ±0.3%. It also supports linkage with the UHV dispatch center to achieve precise voltage regulation.
Is the technology for recycling and purifying new environmentally friendly gases mature?
With mature technology, dedicated nuclear-grade gas recovery and purification equipment can be used, achieving a recovery efficiency of over 99%. The purified gas maintains the same insulating properties as new gas and can be recycled. The recovery cost is only 1/8 of that of SF₆ gas, and the long-term operation and maintenance costs are even lower.
Related Applications
UHV distribution network terminal step-down and distribution scenario: As the core step-down and distribution equipment at the end of the UHV distribution network, it can achieve precise step-down and load distribution of UHV power. The voltage regulation accuracy can ensure stable power supply to downstream high-end industries and urban core distribution networks. The AI collaborative control function can be linked with the UHV dispatching system to achieve rapid fault self-healing and dynamic load adjustment. The environmentally friendly gas meets the green construction goals of the UHV power grid, facilitating the efficient implementation of UHV power.
Auxiliary System Power Distribution Scenario for Nuclear Power Plants: It meets the 40.5kV high-voltage power distribution needs of nuclear power plant auxiliary systems. With nuclear-grade safety design, it can withstand the impact of nuclear radiation environments. Multiple fault locking and emergency power-off functions ensure the safe operation of equipment, supplying power to auxiliary devices such as cooling systems, ventilation systems, and control systems in nuclear power plants. Its low-noise operation does not interfere with the environment of the nuclear power plant control room, and its environmentally friendly gas poses no leakage pollution hazards, meeting the green and safe operation requirements of nuclear power plants.
Ultra-large energy storage cluster grid-connected scenario: As the core high-voltage grid-connected equipment of an ultra-large energy storage cluster (capacity ≥100MWh), it can achieve stable grid-connection between the energy storage cluster and the high-voltage distribution network. The AI collaborative control function can coordinate the charging and discharging of each energy storage unit, achieving peak shaving, backup power supply, and power quality optimization for the grid. The precise voltage regulation and control capability can adapt to the frequent fluctuations in energy storage charging and discharging. The ultra-long lifespan design reduces the operation and maintenance costs of the energy storage cluster, and the environmentally friendly gas aligns with the green development concept in the energy storage field.
High-voltage power distribution scenario for national supercomputing centers: In response to the high-voltage power distribution needs of national supercomputing centers, ultra-low partial discharge and low electromagnetic radiation design can eliminate power supply interference and ensure stable operation of supercomputing equipment. The intelligent collaborative function can be linked with the supercomputing control system to adjust power supply parameters according to computing load, and cooperate with the energy storage system to achieve peak shaving and valley filling, thereby reducing electricity costs. Nuclear-grade safety protection and environmental performance meet the green, safe, and precise power supply requirements of national supercomputing centers.
