110kV 16000kVA Three Phase Oil Immersed Distribution Transformer 11kV Output Voltage
1. Product Overview
The 110kV 16000kVA Three Phase Oil Immersed Distribution Transformer with 11kV output voltage is a high-capacity, medium-to-high voltage power distribution solution engineered for modern utility grids, large-scale industrial substations and renewable energy power plants. Also recognized as a 16MVA three-phase oil-filled step-down transformer, this unit features a standard 110kV high-voltage primary input, a stable 11kV secondary output, and a rated capacity of 16000kVA, fully complying with IEC 60076 and international power grid construction standards. Designed for 50Hz global mainstream power frequency operation, it serves as a critical bulk power conversion device for bridging 110kV regional transmission grids and 11kV medium-voltage distribution networks.
Manufactured with high-grade cold-rolled grain-oriented silicon steel core and pure copper duplex windings, this heavy-duty oil immersed distribution transformer adopts a fully sealed welded steel tank structure and professional mineral oil insulation cooling system. It supports dual cooling modes of ONAN natural oil-air cooling and ONAF forced air cooling, adapting to seasonal temperature changes and variable load operation conditions. With optimized internal winding reinforcement and low partial discharge design, the equipment delivers consistent voltage output, minimal energy loss and outstanding operational stability, making it a mainstream high-efficiency power transformation device for large-capacity power supply projects worldwide.
2. Core Product Features
2.1 Ultra-Low Energy Loss & High Power Conversion Efficiency
This 110kV to 11kV oil immersed power transformer adopts a 45° full miter core lamination structure, which effectively reduces magnetic flux leakage and no-load loss during long-term standby and full-load operation. The upgraded high-conductivity copper winding design cuts down load loss significantly, enabling the overall power conversion efficiency to exceed 99% under rated working conditions. Compared with traditional old-generation 16MVA transformers, this energy-saving model effectively reduces long-term grid operation power consumption, lowers operational costs for power enterprises and industrial users, and meets international energy-saving and carbon emission reduction standards for power equipment.
2.2 Excellent Short-Circuit Withstand & Structural Stability
The three-phase winding structure adopts integral mechanical reinforcement and high-strength A-grade insulating material wrapping, which can effectively resist instantaneous short-circuit current impact and electromagnetic force deformation during grid faults. The fully sealed integrated welding oil tank avoids external moisture, dust and corrosive gas intrusion, preventing internal insulation aging and transformer oil deterioration. The product strictly controls partial discharge levels below 100pC, with stable insulation performance and strong overload resistance, ensuring no structural deformation or operational failure during long-term continuous full-load and peak-load operation in complex power grid environments.
2.3 Accurate 11kV Output & Strong Grid Adaptability
Calibrated for standard 11kV medium-voltage output, this 16000kVA three-phase transformer perfectly matches the voltage standard of global 11kV industrial and distribution power networks. Equipped with a standard ±3×2.5% off-circuit tap changer, it can fine-tune the high-voltage side ratio to compensate on-site 110kV grid voltage fluctuations, ensuring constant and balanced 11kV three-phase voltage output. Optimized for 50Hz power frequency, it operates stably without frequency deviation or power attenuation, and can adapt to unbalanced three-phase loads and mild harmonic interference in actual power grid operation.
2.4 Low Noise Operation & Harsh Environment Adaptability
Through core vibration damping optimization and winding noise reduction technology, the operating noise of the oil immersed distribution transformer is controlled below 60dB under conventional ONAN cooling mode, meeting the noise environmental protection requirements of urban substations and residential adjacent power supply facilities. The whole machine features excellent waterproof, rust-proof and anti-corrosion performance, capable of stable operation in the ambient temperature range of -40℃ to +45℃. It adapts to outdoor open-air substation installation, high-temperature humid areas and industrial heavy dust environments, with strong environmental tolerance and wide application adaptability.
2.5 Low Maintenance & Long Service Life
Adopting anti-aging high-temperature resistant insulating oil and durable internal structural materials, this high-capacity oil filled transformer has a design service life of more than 30 years. The fully sealed structure avoids frequent oil replacement and internal core maintenance, greatly reducing daily operation and maintenance workload. Equipped with standard oil level monitoring, temperature detection and pressure relief protection accessories, it supports unattended long-term operation, effectively lowering the comprehensive operation cost of power supply systems.
3. Core Working Purposes
As a key core equipment for medium and high voltage power transmission and distribution systems, the 110kV 16000kVA three phase oil immersed distribution transformer with 11kV output mainly undertakes large-capacity step-down power conversion tasks. Its core function is to convert 110kV high-voltage electric energy from regional main transmission grids into standard 11kV medium-voltage electric energy, providing qualified and stable power sources for industrial production, urban power distribution and new energy grid-connected systems.
In actual power system operation, this 16MVA high voltage transformer also realizes high and low voltage electrical isolation, grid load balancing and voltage stabilization. It can effectively block high-voltage grid surges and lightning impulse interference, protect downstream 11kV distribution equipment and terminal loads from overvoltage damage. Additionally, it optimizes power transmission efficiency, reduces line power loss during energy distribution, and supports peak load regulation of regional power grids, ensuring continuous and stable power supply for high-load and continuous operation scenarios.
4. Typical Application Scenarios
4.1 Urban & Regional Hub Substations
This 110kV/11kV 16000kVA oil immersed transformer is widely used in urban central substations, regional power supply hubs and power grid upgrading and reconstruction projects. It acts as the main step-down power transformation unit for 110kV high-level grids, converting high-voltage power into 11kV medium-voltage power for secondary distribution, covering urban residential power consumption, commercial complex power supply and municipal public facility electricity demand, and supporting stable operation of urban regional power grids.
4.2 Large Industrial & Mining Enterprise Main Substations
It is the preferred power transformation equipment for heavy industrial enterprises such as metallurgy, chemical industry, coal mining, building materials and large machinery manufacturing. These industries feature high continuous load and high power supply stability requirements, and this high-capacity three-phase transformer can undertake the overall step-down power supply task of factory general substations, providing stable 11kV power for large industrial motors, production lines and supporting electrical equipment, avoiding production shutdown losses caused by power supply instability.
4.3 New Energy Power Station Supporting Projects
The equipment is perfectly suitable for supporting power transformation of large-scale onshore wind farms, centralized photovoltaic power stations and energy storage power stations. In new energy grid-connected systems, it completes step-down conversion of high-power new energy generation electric energy, solves the voltage matching problem between new energy units and public power grids, realizes efficient consumption and safe grid connection of clean energy, and is an indispensable core device for medium and large-scale new energy power generation projects.
4.4 Industrial Park & Economic Zone Centralized Power Supply
For large industrial parks, chemical industrial zones and economic development zones with concentrated power consumption, this 16000kVA oil immersed distribution transformer serves as the main power transformation equipment for park centralized substations. It provides unified and stable 11kV medium-voltage power for multiple settled enterprises, realizes centralized power distribution and unified grid scheduling management, improves the overall power supply efficiency and safety level of the park, and meets the high-load continuous power demand of industrial cluster areas.
5. Frequently Asked Questions (FAQ)
Q1: What cooling modes are supported by the 110kV 16000kVA 11kV output oil immersed transformer?
This three-phase high-capacity transformer takes ONAN natural oil circulation and natural air cooling as the standard configuration, which features low operating noise, energy saving and stable heat dissipation, fully meeting the heat dissipation demand of long-term rated load operation under conventional ambient temperature. For projects with high annual average temperature, long-term overload operation or limited installation ventilation conditions, the optional ONAF natural oil circulation forced air cooling mode can be equipped. The dual cooling mode design allows flexible switching according to on-site working conditions, effectively controls equipment temperature rise during peak load operation, and ensures 24/7 safe and continuous operation of the transformer.
Q2: Why choose 11kV output voltage instead of conventional 10.5kV for industrial and grid projects?
The 11kV medium-voltage output is a universal international standard voltage, widely adopted in Southeast Asia, Africa, Middle East and European industrial power grids and new energy projects. Compared with 10.5kV voltage level, 11kV output features higher transmission efficiency, longer power supply distance and lower line loss, which is more suitable for large-area industrial parks and long-distance power distribution scenarios. This 16000kVA transformer with dedicated 11kV output can perfectly match international standard distribution equipment, avoiding voltage mismatch and power conversion loss in cross-border engineering and overseas grid projects, with stronger global project compatibility.
Q3: What is the overload operation capacity of this 110kV/11kV oil immersed distribution transformer?
This high-capacity oil filled transformer has excellent overload resistance and voltage fluctuation tolerance. Under standard ambient temperature conditions, it can operate stably with 100% full load for a long time, and withstand 110% rated overvoltage continuous operation and 120% short-term intermittent overload operation. The optimized winding and heat dissipation structure avoids excessive temperature rise and insulation aging during peak load periods. It can fully adapt to seasonal power consumption peaks and grid load fluctuations in industrial production and urban power supply scenarios, with strong operational flexibility and stability.
