10000 KVA 3 Phase Duplex Winding Oil Immersed Transformer 110kV to 10.5kV
1. Product Description
The 10000 KVA 3 Phase Duplex Winding Oil Immersed Transformer 110kV to 10.5kV is a high-performance medium and high voltage power conversion equipment independently developed and manufactured in compliance with international IEC standards and national GB power transformer specifications. As a mainstream 10MVA three-phase oil-filled power transformer widely used in industrial power transmission and urban power grid systems, this duplex winding step-down transformer features a standard high voltage input of 110kV and a low voltage output of 10.5kV, realizing stable voltage conversion between high-voltage power grids and medium-voltage power distribution systems.
Adopting mature oil-immersed cooling technology and optimized duplex winding structure design, this 110kV step-down transformer effectively solves the heat dissipation and insulation problems of high-capacity power transformation. The whole machine uses high-quality cold-rolled grain-oriented silicon steel sheets for the iron core and high-purity copper wire for windings, paired with premium insulating oil and fully sealed box structure, which greatly improves the operational stability and service life of the equipment. Different from dry-type transformers, this oil immersed power transformer is more suitable for long-term continuous heavy-load operation in outdoor and substation environments, with excellent overload resistance and environmental adaptability.
This 3 phase oil immersed transformer strictly passes partial discharge testing, short-circuit withstand test and temperature rise test during production, with extremely low partial discharge value and stable electrical performance. It covers the mainstream power demand of 10000KVA rated capacity, and is the core key equipment for power grid voltage reduction, industrial power matching and regional power distribution.
2. Core Product Features
2.1 Reliable Duplex Winding Structure
Equipped with professional duplex winding design, the high-voltage and low-voltage windings are arranged reasonably with uniform electric field distribution. Through precise turn balance calculation and dense winding spacer treatment, the transformer effectively resists mechanical deformation and electrical impact caused by sudden short-circuit faults. The double-winding isolation structure avoids mutual interference between voltage levels, ensuring accurate and stable 110kV to 10.5kV voltage conversion, and greatly improving the safety of power transmission.
2.2 Excellent Oil Immersed Cooling & Insulation Performance
Adopting advanced oil immersed self-cooling mode, the special transformer insulating oil inside the sealed tank circulates continuously to take away the heat generated by core and windings during operation, realizing efficient heat dissipation and constant temperature control. The high-grade insulating materials and vacuum oil injection process effectively reduce partial discharge, with the partial discharge index far lower than the industry standard. It can maintain stable insulation performance in high temperature and humid environments, avoiding insulation aging and breakdown caused by long-term operation.
2.3 Low Loss & Energy Saving Operation
The iron core is made of high-quality CRGO silicon steel sheets with low magnetostriction and low loss characteristics. Optimized core lamination and winding process effectively reduce no-load loss, load loss and operating noise. Compared with traditional old-fashioned transformers, this 10MVA high voltage transformer can save a large amount of electric energy loss during long-term grid operation, significantly reducing enterprise power operation costs and meeting national energy-saving and emission-reduction standards.
2.4 Strong Environmental Adaptability & Leak-Proof Design
The whole machine adopts a fully sealed welded steel tank structure, with high-performance acrylic sealing parts and one-piece molding process to eliminate oil leakage risks. After strict positive and negative pressure leak detection and fluorescent flaw detection, the equipment has excellent sealing performance. It can work stably in outdoor substations, industrial parks and other complex environments, resisting wind, rain, dust and temperature changes. The low-noise design reduces operating noise to below the national standard, avoiding noise pollution to the surrounding environment.
2.5 High Mechanical Strength & Long Service Life
All core clamping components are optimized for strength and rigidity, which can withstand the mechanical impact of three times the rated short-circuit current, ensuring no thermal or mechanical damage during grid faults. The overall structure is sturdy and durable, with no need for frequent core lifting maintenance. The stable material performance and mature manufacturing process ensure the equipment has a service life of more than 30 years under normal operating conditions.
3. Core Usage
The core function of the 10000 KVA 3 Phase Duplex Winding Oil Immersed Transformer 110kV to 10.5kV is to complete step-down power transformation of high-voltage power grids, convert 110kV high-voltage industrial grid electricity into 10.5kV medium-voltage industrial and civil usable electricity, and provide stable and continuous power support for subsequent power distribution equipment and terminal electrical loads.
As a key intermediate power transformation device in the power supply system, this 110kV power transformer undertakes the power transmission and voltage regulation tasks of regional power grids. It can balance grid voltage fluctuations, stabilize system power quality, and avoid equipment damage and power supply interruption caused by excessive voltage or unstable current. At the same time, it supports long-term full-load and overload operation, meets the continuous power consumption demand of high-power equipment, and improves the reliability and continuity of regional power supply.
In addition, this three-phase duplex winding transformer can cooperate with substation supporting equipment to complete power distribution and shunt work, optimize grid power transmission efficiency, reduce line loss, and provide safe and compliant power guarantee for industrial production, urban construction and regional power supply.
4. Application Scenarios
4.1 Urban & Rural Power Grid Substations
This 10000KVA oil immersed step-down transformer is widely used in 110kV urban primary substations and rural regional substations. It is responsible for converting high-voltage grid power into 10.5kV distribution voltage, providing basic power supply for urban residential areas, commercial districts and rural centralized power supply areas, and is an indispensable core equipment for urban and rural power grid upgrading and reconstruction projects.
4.2 Large Industrial & Mining Enterprises
It is suitable for supporting power supply of large manufacturing factories, mining enterprises, chemical plants, metallurgical enterprises and other high-power industrial enterprises. Industrial production equipment usually requires stable 10kV level power supply, and this 110kV to 10.5kV transformer can perfectly match the power demand of industrial heavy-load equipment, solve the problem of voltage mismatch of enterprise power access, and ensure the stable operation of industrial production lines.
4.3 New Energy Power Generation Supporting Projects
With the rapid development of new energy industry, this high-capacity oil immersed transformer is widely used in wind power plants, photovoltaic power stations and energy storage power stations. It is used for step-down grid connection of new energy power generation, converting the generated high-voltage electric energy into medium voltage power suitable for grid integration, solving the problem of unstable voltage of new energy power generation, and improving the grid connection efficiency of new energy power.
4.4 Infrastructure & Key Engineering Projects
It provides supporting power transformation services for large-scale infrastructure projects such as railway transit, airport hubs, industrial parks and logistics parks. These key projects have large and stable power consumption demand, and the 10MVA high-performance transformer can meet the long-term continuous power supply requirements of the project, ensuring the stable operation of public infrastructure and key engineering equipment.
5. FAQ
Q1: What are the main differences between 10000KVA duplex winding oil immersed transformer and dry-type transformer?
The core difference lies in the cooling medium and application environment. This 3 phase oil immersed transformer adopts insulating oil circulating cooling, with better heat dissipation effect, stronger overload resistance and lower operating cost. It is suitable for outdoor substation, industrial field and other open and heavy-load operation scenarios. Dry-type transformers rely on air cooling, with small load capacity and high manufacturing cost, and are mostly used in indoor fire-proof and explosion-proof scenarios such as commercial buildings and indoor distribution rooms. In terms of service life and stability, oil immersed power transformers have obvious advantages in long-term heavy-load industrial power supply scenarios.
Q2: What is the operating temperature range and overload capacity of this 110kV to 10.5kV transformer?
The standard operating ambient temperature of the transformer is -20℃ to +40℃, and the maximum temperature rise of winding and iron core strictly complies with GB and IEC international standards. Under rated working conditions, it can operate continuously for 24 hours with full load. In case of temporary peak power consumption, it can withstand 1.2 times overload operation within 2 hours without equipment damage. The built-in temperature monitoring device can real-time monitor the internal oil temperature and winding temperature, and automatically protect the equipment when the temperature exceeds the limit, effectively avoiding equipment failure caused by overheating.
Q3: How to carry out daily maintenance and oil replacement for the oil immersed transformer?
This fully sealed duplex winding transformer has low daily maintenance difficulty. Daily inspection only needs to check whether the oil level is normal, whether the tank body has oil leakage, whether the temperature and noise are abnormal, and regularly clean the external dust and sundries. The insulating oil does not need frequent replacement. Under normal operating conditions, the first oil quality detection is carried out after 3 years of operation, and the insulating oil is replaced every 8-10 years. Regular partial discharge detection and insulation resistance testing are recommended to ensure the electrical performance of the equipment. The whole machine does not need frequent core lifting maintenance, which greatly reduces later operation and maintenance costs.
