How to configure commercial transformers

In modern commercial buildings, the stability and security of power system are very important. As one of the core equipment in the power system, the reasonable configuration of transformer not only affects the power supply quality of the whole building, but also directly affects the operation efficiency and energy consumption of the equipment. Therefore, scientific and reasonable allocation of commercial transformers is the key link to ensure the normal operation of commercial facilities.

First, clear load demand

Before configuring the transformer, it is necessary to make a comprehensive assessment of the electricity load of commercial buildings. This includes the total power of basic lighting, air conditioning system, elevator, office equipment, ventilation system and other loads, and considers the future expansion demand. Usually, the "demand coefficient method" or "simultaneous coefficient method" is used to estimate the maximum load in actual operation, so as to avoid the problem that the transformer capacity is too large or too small.

Second, choose the appropriate type and capacity

According to the load type and use environment, choose the appropriate transformer type. There are common dry-type transformers and oil-immersed transformers. Dry-type transformer has the advantages of good fire resistance and convenient maintenance, and is suitable for crowded places such as shopping malls and office buildings. Oil-immersed transformers are suitable for places with low fire protection requirements and large space, such as industrial parks.

The transformer capacity should be reasonably selected according to the actual load, and it is generally recommended that the transformer load rate should be controlled between 60% and 80% to ensure the operation efficiency and leave a margin to deal with sudden load.

Third, consider energy saving and environmental protection performance

Under the background of "double carbon" goal, more and more attention has been paid to energy-saving transformers. High-efficiency and low-loss transformer products, such as S11, S13 and above energy-saving transformers, amorphous alloy transformers and other new energy-saving equipment, should be preferred to reduce no-load loss and load loss and realize green and energy-saving operation.

Fourth, reasonable installation and distribution layout

The installation position of transformer should also be considered comprehensively. It should be as close to the load center as possible to reduce line loss and voltage drop and improve power supply quality. At the same time, safety factors such as ventilation and heat dissipation, fire prevention and moisture prevention should be considered, and sufficient maintenance space should be reserved.

In addition, in the design of power distribution system, reasonable protection devices, such as circuit breakers and fuses, should be set up to ensure that the power supply can be cut off in time in case of short circuit or overload, and to protect the safety of equipment and personnel.

V. Intelligent monitoring and operation and maintenance management

With the development of smart grid, more and more commercial buildings begin to introduce smart transformer monitoring system. Real-time monitoring of transformer operation state (such as temperature, current, voltage, load rate, etc.) is realized through the Internet of Things technology, so as to find potential faults in time and improve management efficiency and emergency response capability.

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The configuration of commercial transformer is a systematic project, involving load calculation, equipment selection, energy saving and environmental protection, installation and wiring, etc. Only on the basis of full investigation and scientific planning can we realize the efficient, safe and economical operation of transformers and provide stable and reliable power support for commercial buildings. In the future construction of commercial distribution system, intelligence, energy saving and modularization will become the important development direction of transformer configuration.