115 Kv 115kv 22kv 132 Kv 120 Mva 120mva 125 Mva Electric Substation Power Transformer
115 Kv 115kv 22kv 132 Kv 120 Mva 120mva 125 Mva Electric Substation Power Transformer
1. Product Description
This 115kV/132kV high-voltage electric substation power transformer adopts professional flyback topology design, covering mainstream large power capacities of 120MVA and 125MVA, and supports dual high input voltage grades of 115kV and 132kV with matched 22kV low-voltage output. As a high-power grid-grade power conversion device exclusive for large-scale power substations, it breaks through the structural limitations of traditional forward transmission power transformers, applying mature flyback coupled inductor working principle to high-capacity high-voltage power distribution scenarios. It effectively solves common pain points such as magnetic core saturation, instantaneous voltage surge and unstable power transmission of conventional large substation transformers during variable load operation.
Different from ordinary power transformers that transmit energy synchronously, this high-voltage flyback topology power transformer stores electric energy in the gapped magnetic core during the switch-on phase and releases magnetic energy to the secondary winding for power supply during the switch-off phase. This unique energy storage and release cycle structure greatly optimizes the energy conversion efficiency of 115kV and 132kV high-voltage power grids. Manufactured in full compliance with IEC and IEEE substation equipment standards, the whole machine adopts high-permeability low-loss silicon steel core and ultra-high conductivity copper winding, supporting stable full-load operation of 120MVA and 125MVA large power loads for a long time.
All units undergo strict factory full-load aging tests, high-voltage withstand detection and insulation performance verification. The equipment realizes stable step-down conversion from 115kV/132kV ultra-high voltage to standard 22kV medium voltage, with precise voltage regulation rate and excellent grid anti-interference ability. Tailored for core substation power distribution links, this flyback topology substation transformer features compact internal layout, reliable sealing structure and strong overload resistance, and is a high-efficiency and high-stability core power device for modern large power grid construction and upgrading projects.
2. Core Purpose
The core purpose of this 120MVA/125MVA high-voltage substation transformer is to implement safe, efficient and stable ultra-high voltage step-down conversion and regional grid power balance for 115kV and 132kV main power grids. It mainly undertakes the key power conversion task of large-scale power substations, converting 115kV and 132kV high-voltage transmission power into standard 22kV medium-voltage distributable power, providing reliable power source support for subsequent regional power distribution networks and terminal large-load power consumption equipment.
Benefiting from the inherent structural advantages of flyback topology, this high-power electric substation transformer can effectively suppress instantaneous current impact and voltage spike generated by grid load switching, avoid magnetic core saturation during long-term full-load operation, and significantly improve the stability of high-voltage power system operation. It can balance three-phase load deviation of large power grids, reduce reactive power loss and harmonic interference in power transmission, optimize regional power quality, and effectively lower long-term operation energy consumption and grid loss of large power substations.
In addition, the flyback topology brings natural electrical isolation and fault suppression capabilities. When the power grid has short-circuit faults and overload abnormalities, the energy storage and release mechanism can limit fault current expansion, protect the safety of high-voltage grid lines and subsequent power distribution equipment. As the core hub equipment of power transmission and distribution, it ensures continuous and uninterrupted stable power supply for regional industrial production, urban centralized power consumption and key power guarantee scenarios.
3. Application Scenarios
3.1 Large-Scale Regional Power Substations
This 115kV/132kV 120MVA/125MVA flyback topology power transformer is the core matching equipment for provincial and municipal main power substations and regional hub power stations. It is suitable for ultra-high voltage power conversion and power distribution work of 115kV and 132kV main grid lines, and can stably undertake large-capacity power transmission tasks of regional power grids. The 22kV stable output provides standardized medium-voltage power sources for urban trunk power distribution networks, meeting the centralized power supply demand of large regional power consumption areas.
3.2 Large Industrial & Energy Base Power Supply
It is widely applied in large industrial parks, chemical energy bases, metallurgical and mining industrial clusters and new energy centralized power generation bases. These scenarios have ultra-large power load and require long-term full-load stable power supply. The 120MVA and 125MVA large capacity perfectly matches the high-power operation demand of industrial heavy-load equipment, while the flyback topology’s anti-fluctuation and anti-saturation performance adapts to complex variable load working conditions of industrial energy bases, ensuring stable grid operation of industrial power supply systems.
3.3 Urban Power Grid Upgrading & Expansion Projects
With the continuous growth of urban power consumption, traditional substation equipment is prone to overload operation and insufficient power supply capacity. This high-efficiency flyback substation transformer is widely used in urban power grid reconstruction, capacity expansion and upgrading projects. It replaces old low-efficiency transformers, improves regional power grid transmission capacity and power supply stability, and solves the problems of urban peak power shortage and voltage instability, effectively supporting the safe operation of urban commercial, residential and municipal power systems.
3.4 New Energy Grid Connection & Long-Distance Power Transmission Projects
Suitable for grid-connected power distribution of large photovoltaic power stations, wind power bases and hydropower stations, as well as long-distance high-voltage power transmission and transformation projects. New energy power generation has obvious intermittency and load fluctuation, and the flyback topology’s excellent grid adaptation ability can effectively restrain power fluctuation caused by new energy grid connection, stabilize grid voltage and frequency, and improve the safety and stability of new energy power grid integration and long-distance power transmission.
4. Product Features
4.1 Advanced Flyback Topology with Anti-Saturation Performance
Different from traditional forward-mode high-voltage transformers, this electric substation power transformer adopts optimized flyback topology with gapped-core structure. It completes energy storage and energy release in stages, which fundamentally avoids magnetic core saturation failure that easily occurs in large-capacity long-term full-load operation. This structural advantage greatly enhances the equipment’s adaptability to variable grid loads, suppresses voltage spike and current surge, and significantly improves the anti-interference ability and operation stability of high-voltage power systems.
4.2 Ultra-Large Capacity & Multi-Voltage Grade Compatibility
The product covers two mainstream large power capacities of 120MVA and 125MVA, matching the ultra-high load demand of modern large power substations. It supports dual ultra-high input voltages of 115kV and 132kV, and stably outputs standard 22kV medium voltage, covering multiple mainstream voltage grades of global high-voltage power grids. The multi-voltage and multi-capacity flexible matching design avoids customized equipment costs for different grid standards, with extremely high universality for large power engineering projects.
4.3 Low Loss & High Energy-Saving Operation Efficiency
Adopting high-grade low-loss silicon steel core and high-purity integral copper winding, the equipment minimizes magnetic flux leakage and coil resistance loss. Combined with the energy optimization advantage of flyback topology, it effectively reduces no-load loss and full-load operation loss during high-power power conversion. Compared with traditional large substation transformers, it has higher power transmission efficiency, lower grid operation loss, and more prominent energy-saving and consumption-reducing effects, which can effectively reduce the long-term operation cost of power grids.
4.4 High Safety & Strong Fault Tolerance
The flyback topology has inherent current limiting and electrical isolation characteristics, which can effectively restrain fault current expansion when short-circuit, overload and other grid faults occur, reducing equipment burnout and grid accident risks. Equipped with complete overvoltage protection, lightning protection and temperature control systems, the whole machine can automatically monitor and adjust operating status in real time. The high-strength insulation structure ensures safe and stable operation of 115kV/132kV ultra-high voltage conversion links, with extremely high operational safety and reliability.
4.5 Harsh Environment Adaptability & Long Service Life
Designed for outdoor substation long-term unattended operation, the transformer adopts fully sealed anti-corrosion shell and high-temperature aging-resistant insulating medium. It can stably adapt to harsh working environments such as high temperature, low temperature, high humidity and strong ultraviolet radiation. The internal flyback topological structure has stable performance and low fatigue loss, with low daily maintenance demand. Under standard operation and maintenance conditions, the service life is far longer than traditional substation transformers, meeting the long-term operation requirements of large power grid infrastructure.
5. Frequently Asked Questions (FAQ)
5.1 What core advantages does flyback topology have for 120MVA/125MVA high-power substation transformers?
Traditional high-power substation transformers adopt synchronous energy transmission mode, which is prone to magnetic core saturation, voltage surge and large grid fluctuation under long-term full-load and variable load conditions. The flyback topology used in this product stores energy first and then releases it, with a gapped-core anti-saturation design. It can effectively stabilize high-voltage grid voltage, limit instantaneous fault current, reduce harmonic interference and power loss. In large-capacity and high-fluctuation substation operation scenarios, its stability and fault resistance are far better than traditional topological transformers, which is the key advantage for large grid application.
5.2 How to choose between 115kV and 132kV input voltage and 120MVA/125MVA capacity?
115kV input is suitable for regional conventional main substations and urban grid upgrading projects with medium and large power load, while 132kV input is applicable for ultra-long distance power transmission, large energy base grid connection and provincial hub substation projects with higher voltage grade requirements. For load matching, 120MVA capacity is recommended for conventional large regional power supply scenarios, and 125MVA high-capacity model is more suitable for peak load intensive areas and new energy high-proportion grid connection scenarios to ensure sufficient load margin and avoid long-term overload operation.
5.3 Is this high-voltage flyback transformer suitable for long-term full-load continuous operation?
Yes, it fully supports 24-hour long-term full-load stable operation. This 115kV/132kV substation power transformer is specially optimized for high-power continuous working conditions. The flyback topology solves the core saturation problem that plagues traditional high-power transformers under long-term full load, and the low-loss core and copper winding structure effectively control operating temperature rise. After strict factory full-load aging testing, it can adapt to long-term high-load operation of large substations, new energy grid connection and industrial energy bases, maintaining stable power conversion efficiency and power quality for a long time.
