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NSHBG-30
NSHBG-30 Environmentally friendly gas-insulated ring main unit
The 30kV environmentally friendly gas insulated ring main unit is a specialized high-voltage equipment designed for domestic ultra-high voltage distribution network transition links and large wind power bases. It uses a mixture of perfluoroisobutyronitrile and CO ₂ environmentally friendly gas (GWP value ≤ 25) to replace traditional SF ₆ gas. It integrates wind power dedicated circuit breakers, bidirectional measuring transformers, and low-voltage ride through adaptation modules. The gas box is made of high-strength aluminum alloy integrated casting, taking into account both high-voltage withstand performance and lightweight characteristics. The equipment complies with GB/T 11022-2022 and the special standards for the wind power industry. It is optimized and designed for the characteristics of large fluctuations in 30kV distribution network wind power grid connection, long transmission distance, and complex outdoor installation environment. It is suitable for onshore wind power, high voltage wind power, and ultra-high voltage distribution network branch lines, achieving the dual goals of green high-voltage distribution network and high-efficiency wind power grid connection.
Features
1. Strong adaptability to wind power grid connection, optimized low voltage ride through and arc extinguishing characteristics, can stably bear the impact and output fluctuation of wind power single unit large capacity grid connection, and avoid off grid faults caused by voltage sag.
2. High voltage lightweight balance, aluminum alloy casting molded gas box reduces the weight by 35% compared to traditional steel gas box, increases the compressive strength by 20%, and is suitable for transportation and installation in special scenarios such as mountainous areas and plateaus in wind power bases.
3. Balancing environmental protection and high-voltage performance, the mixed gas insulation strength reaches 97% of SF ₆, the arc extinguishing efficiency meets the short-circuit breaking requirements of 30kV level, and the gas recovery and utilization rate is 100%, which meets the “dual carbon” assessment requirements of new energy projects.
4. Excellent outdoor weather resistance, the air box adopts multiple anti-corrosion and anti condensation designs, which can resist strong ultraviolet rays, low temperature freezing and thawing, and humid and hot environments on the plateau, and is suitable for all climate wind power scenarios.
Rated current range: 1600A-3150A, rated short-circuit breaking current: 31.5kA-40kA, air box protection level IP67, suitable for ambient temperatures ranging from -45 ℃ to+70 ℃. Supports IEC 61850-9-2 and DL/T 1498-2016 wind power dedicated communication protocols, can be connected to the wind power centralized control platform, and achieve functions such as grid connection status monitoring and low-voltage ride through control. The module combination covers 2-8 circuits and supports mixed configuration of circuit breakers and load switches. It is equipped with a wind power dedicated lightning protection module, with an air leakage rate of ≤ 0.05%/year. It can operate normally for 10 years without the need for air replenishment.
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Specification
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FAQs
Can the device adapt to the low-pressure environment of the Gaoyuan wind power base?
Fully adapted, through special optimization in high-altitude low-pressure environments, it can still maintain rated insulation performance in areas below 4500 meters above sea level. At the same time, the gas box sealing process has been upgraded to avoid gas leakage caused by low-pressure.
What functions can the low-voltage ride through adaptation module achieve?
It can quickly respond to temporary voltage drops in the power grid (≤ 20% rated voltage), maintain grid stability, avoid wind turbine disconnection, and support rapid voltage recovery after crossing, which meets the national standards for wind power grid connection.
How reliable is the aluminum alloy gas box in the strong vibration environment of the wind power base?
The air box has undergone seismic reinforcement design and can withstand the conducted vibration of wind turbine tower and outdoor gust impact. The connection adopts a flexible sealing structure, and the air leakage rate remains stable under vibration environment, with a service life of ≥ 25 years.
Related Applications
Large scale onshore wind power base grid connection scenario: Suitable for the vast outdoor environment of northwest and north China onshore wind power bases, with a wide temperature tolerance to cope with extreme temperature differences between day and night and low temperature freezing and thawing in winter. The wind power dedicated arc extinguishing design can stably bear the current impact caused by wind turbine start stop and output fluctuations. Environmentally friendly gases are in line with the green positioning of the new energy base, and the intelligent grid connected module can be linked with the wind power centralized control system to achieve centralized and networked control of multiple wind turbines, helping to efficiently transmit wind power to the ultra-high voltage distribution network.
Transition scenario of high-altitude ultra-high voltage distribution network: In response to the demand for the transition of 30kV distribution network to higher voltage levels in the southwestern and northwestern plateau regions, lightweight design facilitates transportation and installation on mountain roads and cableways, and strong ultraviolet protective coating can resist high radiation erosion. As the core equipment of the transition link in the distribution network, it can achieve load transfer and voltage stability regulation, reduce high-voltage transmission losses, ensure stable power supply for high-altitude county towns and industrial parks, and meet the environmental protection requirements of high-altitude ecological protection.
Large scale chemical industrial park ultra-high voltage branch distribution scenario: Suitable for the power supply needs of 30kV ultra-high voltage branch lines in large chemical industrial parks, the sealed gas box can isolate corrosive gases and dust in the chemical industry, avoiding component aging and failure. The stable short-circuit breaking performance can cope with the load impact of large equipment such as chemical reactors and compressors. The wind power grid adaptation function is compatible with the park’s self owned wind power projects, achieving on-site consumption of green electricity while balancing production continuity and low-carbon goals.
Urban suburban ultra-high voltage distribution network extension scenario: In response to the ultra-high voltage distribution network extension needs of urban suburban new cities and industrial parks, the compact structure can be flexibly installed in outdoor box transformers or small distribution rooms, and the anti condensation design can cope with high humidity environments in suburban areas. The intelligent boundary function can quickly isolate the faulty section, reduce the impact on the power supply of the urban core area, and at the same time, there is no hidden danger of environmental gas leakage and pollution, which is in line with the green distribution network construction plan for the outskirts of the city.
