110kV 8000kVA Oil Immersed Distribution Transformers
110kV 8000kVA Oil Immersed Distribution Transformers
1. Product Description
110kV 8000kVA Oil Immersed Distribution Transformers are high-capacity, high-voltage power transformation equipment tailored for regional power transmission and large-scale industrial power distribution systems. Also known as 8MVA 110kV oil immersed power transformers, this series of three-phase power conversion devices adopts mature oil-immersed insulation and natural cooling technology, serving as core step-down and voltage regulation units in 110kV medium-to-high voltage power grids. Manufactured in strict accordance with IEC international standards and national power energy efficiency specifications, the equipment integrates low-loss magnetic core materials and high-strength copper winding structures, realizing stable conversion of 110kV high-voltage electricity into conventional medium and low voltage for terminal power distribution.
Different from medium and small-capacity distribution transformers, this 110kV high-voltage oil immersed transformer is designed for heavy-load, long-duration continuous operation scenarios. It adopts fully sealed welded steel tank structure and high-purity insulating oil, with optimized internal magnetic circuit and winding layout to effectively control no-load loss, load loss and partial discharge value. The whole machine features compact mechanical structure, strong pressure resistance and excellent insulation performance, solving common operational problems of traditional high-voltage transformers such as high noise, large power consumption and poor short-circuit resistance. As a key mainstream equipment in urban grid substations and industrial power supply stations, it can adapt to long-term full-load operation and complex outdoor power grid environments, with stable and reliable overall performance.
2. Core Product Features
This 110kV 8000kVA oil immersed distribution transformer has comprehensive advantages in energy efficiency, safety, stability and environmental adaptability, fully meeting the high-standard operation requirements of modern large power grids and heavy industrial power supply projects, and is widely recognized as a cost-effective high-voltage power transformation solution.
2.1 Ultra-Low Loss and High Energy Efficiency
Adopting high-permeability low-loss grain-oriented silicon steel sheets and advanced multi-stage lap joint core technology, the 8000kVA high-voltage transformer greatly reduces no-load current and idle power consumption. The optimized winding ampere-turn balance design minimizes magnetic leakage loss during load operation, with overall energy consumption far below industry standard limits. It fully complies with international power grid energy-saving standards, effectively reducing long-term operating power loss and operational costs for power grid enterprises and large industrial users, achieving low-carbon and efficient grid operation.
2.2 Low Noise and Low Partial Discharge Performance
Through precise structural optimization and vibration damping design, the natural cooling operating noise of this oil immersed transformer is controlled below 60dB, avoiding noise pollution to the surrounding environment. The internal insulation structure is strictly optimized, with partial discharge volume stably controlled below 100pC, effectively preventing insulation aging and electrical corrosion caused by partial discharge. This low partial discharge design greatly extends the service life of internal windings and insulating materials, ensuring long-term stable operation of high-voltage equipment.
2.3 Strong Short-Circuit Resistance and Overload Capacity
The coil is supported by high-strength insulating framework, and the oil tank side wall adopts integral laser forming process, with uniform internal structural stress and excellent mechanical stability. The whole machine has strong anti-short-circuit impact capability and lightning surge resistance, which can effectively resist sudden short-circuit faults and grid voltage impacts. Meanwhile, it supports safe overload operation within a certain range, adapting to peak power load fluctuations of power grids and industrial production, avoiding equipment shutdown caused by temporary load surge.
2.4 Fully Sealed and Leak-Proof Structure
All sealing flanges adopt groove-type sealing design, matched with high-quality brass oil drain valves and vacuum butterfly valves for radiators, realizing all-round reliable sealing. The fully sealed tank body completely isolates internal insulating oil and windings from external air, moisture and dust, preventing insulating oil oxidation, moisture absorption and deterioration. There is no need for frequent oil replacement and internal maintenance, realizing long-term low-maintenance operation and effectively solving the oil leakage problem of traditional high-voltage transformers.
2.5 Excellent Environmental Adaptability and Long Service Life
The outer shell adopts professional derusting and electrostatic powder spraying technology, with excellent anti-corrosion, anti-oxidation and ultraviolet resistance. The equipment can operate stably in high humidity, high temperature and low temperature harsh environments, and can adapt to outdoor open-air substation installation conditions. With high-temperature resistant aging-free insulating materials and stable internal structure, the service life of the transformer can reach more than 30 years under standard operating conditions, with extremely low failure rate and high operational reliability.
2.6 Intelligent Temperature Monitoring and Safety Protection
Equipped with high-precision temperature sensors and overtemperature relays, the transformer can monitor oil temperature and winding temperature in real time during operation. When the temperature exceeds the safe threshold, it will automatically trigger alarm or power-off protection to avoid equipment burnout caused by overheating. Combined with pressure relief protection and overload protection devices, it builds a multi-dimensional safety protection system to ensure the safe and orderly operation of the 110kV high-voltage power distribution system.
3. Core Usage
As an indispensable core equipment in high-voltage power transmission and distribution systems, the 110kV 8000kVA Oil Immersed Distribution Transformer mainly undertakes the key task of 110kV high-voltage step-down conversion and regional centralized power distribution. It converts high-voltage power from 110kV transmission lines into standard 35kV, 10kV and other medium-voltage power, providing stable power source for secondary distribution transformers and terminal power consumption equipment.
In actual power grid operation, this high-capacity oil immersed power transformer can effectively stabilize regional grid voltage, restrain voltage fluctuation and harmonic interference, and balance power grid load distribution. It greatly reduces electric energy loss in long-distance power transmission, improves regional power supply capacity and power supply quality, and solves the problem of insufficient power supply in high-load areas. In addition, it can cooperate with large new energy power stations to complete grid-connected power conversion and energy distribution, optimize the operation structure of modern power grids, and guarantee the continuity and stability of industrial and civil power supply.
4. Application Scenarios
Relying on large load capacity, high operational stability and strong environmental adaptability, the 110kV 8000kVA oil immersed distribution transformer is widely used in key scenarios such as urban power grid construction, large industrial bases, new energy power generation and regional hub substations, covering most high-power high-voltage power distribution demands.
4.1 Urban and Regional Hub Substations
It is the core power transformation equipment for urban main substations, economic development zone substations and county-level regional power supply hubs. It undertakes the task of centralized step-down and unified distribution of 110kV high-voltage power, supporting daily power consumption of urban residential areas, commercial complexes and public facilities, and ensuring stable power supply for regional power grid peak periods.
4.2 Large Industrial and Mining Enterprises
Suitable for supporting power supply of large chemical bases, metallurgical industrial parks, mining groups and heavy machinery manufacturing enterprises. These industrial scenarios have long-term high-load power demand and strict requirements on power supply stability. The 8000kVA high-capacity transformer can continuously and stably supply power for large industrial production lines and heavy equipment, meeting the 24-hour uninterrupted operation demand of industrial production.
4.3 Large-Scale New Energy Power Stations
Widely matched with centralized photovoltaic power bases, onshore wind farms and energy storage power station projects. It is responsible for collecting and converting new energy electric energy, realizing step-down grid-connected transmission of clean energy power, solving the problems of scattered power generation and difficult centralized distribution of new energy, and improving the utilization rate and grid-connected stability of renewable energy.
4.4 Infrastructure and Key National Engineering Projects
Used for supporting power distribution of large water conservancy projects, railway hub projects, airport economic zones and data center industrial parks. These key infrastructure projects have extremely high requirements for power supply safety and continuity. This high-reliability 110kV oil immersed transformer can provide long-term stable high-capacity power guarantee for key projects and avoid operational risks caused by power supply failure.
5. FAQ
5.1 Why choose 8000kVA capacity for 110kV oil immersed distribution transformer in regional substation construction?
The 8000kVA (8MVA) capacity is the most mainstream and cost-effective specification for 110kV regional distribution substations. Compared with smaller 5000kVA or 6300kVA models, it has larger load margin and can cope with regional power load growth in the next 5–10 years without frequent equipment replacement. Compared with larger 10000kVA transformers, it avoids equipment idle waste and excessive investment cost. This capacity perfectly matches the power demand of urban branch substations and ordinary large industrial parks, balancing operational stability and economic benefits, so it is widely adopted in conventional power grid transformation and new substation construction projects.
5.2 How does the fully sealed oil immersed structure improve the operational life of 110kV high-voltage transformers?
Traditional open-type 110kV transformers are equipped with oil conservators, which easily cause insulating oil oxidation and moisture absorption due to contact with air, leading to insulation aging and reduced equipment performance. This fully sealed oil immersed distribution transformer adopts an integral welded fully sealed tank body, which completely isolates internal insulating oil and windings from the external environment. The insulating oil maintains stable insulation and heat dissipation performance for a long time, with extremely slow aging speed. It effectively avoids internal insulation damp and partial discharge increment, extending the overall service life of the transformer to more than 30 years, and greatly reducing later maintenance frequency and failure rate.
5.3 What are the key daily maintenance points for 110kV 8000kVA oil immersed transformers?
This high-capacity high-voltage transformer belongs to low-maintenance equipment, with simple daily management. First, regularly check the oil tank sealing condition to confirm no oil leakage, and observe the oil level to ensure it is within the standard range. Second, monitor the operating oil temperature and noise in real time, and check the temperature sensing and protection devices to ensure sensitive and effective action. Third, regularly clean the radiator surface dust to guarantee unobstructed natural heat dissipation. In addition, conduct regular oil quality testing and partial discharge detection every few years. Standard routine maintenance can effectively eliminate hidden dangers and ensure long-term safe and efficient operation of the equipment.
