Multi-serial-port parallel communication transformer

Abstract

The invention discloses a multi-serial-port parallel communication transformer, which comprises an equipment communication platform and a plurality of transformers connected in series with the equipment communication platform through an M-BUS bus, wherein the equipment communication platform is communicated with each transformer through an independent communication protocol; and data transmissionamong multiple transformers is carried out by means of polling. The transformer is an oil-immersed current transformer. The oil-immersed current transformer comprises an oil tank. The upper end of theoil tank is fixedly connected with the lower end of a porcelain sleeve; and the upper end of the porcelain sleeve is fixedly connected with an expander. The expander comprises a housing and a rippleexpander body arranged in the housing. The expander is provided with a cooling coil and piston rods, and self heat radiation is realized by utilizing expansion kinetic energy of the expander. The multi-serial-port parallel communication transformer can realize self heat radiation and can reduce use of the cooling water; a main device is designed to control multiple serial port digital transformers; and the transformer can reduce wiring distance, is convenient to install, and is safer in serial port communication and does not lose data.

Description

technical field [0001] The invention relates to a multi-serial port parallel communication transformer. Background technique [0002] The principle of the traditional current transformer is electromagnetic induction. The primary winding is connected in series in the power line, and the external circuit of the secondary winding is connected with a measuring instrument or relay protection and automatic control device. The electromagnetic coupling between the high and low voltage windings is used to transfer information from primary side to secondary side. This structure requires an insulating layer with sufficient withstand voltage strength between the iron core and the winding and between the primary and secondary windings to ensure that all low-voltage equipment is isolated from high voltage. With the increase of the power capacity transmitted by the power system, the voltage level is getting higher and higher, so the insulation structure of the transformer becomes more and...

AI Technical Summary

Problems solved by technology

However, with the continuous increase of power transmission capacity, the continuous improvement of grid voltage level and the continuous improvement of protection requirements, the general iron core current transformer structure has gradually exposed its incompatible weaknesses. Weaknesses such as saturation, ferromagnetic resonance, small dynamic range, and narrow frequency band are difficult to meet the development needs of the new generation of power system automation and power digital network.

In the existing technology, either manual real-time attention to the temperature displayed on the interface of the transformer expander is required, or it is directly transmitted after being collected by a wireless temperature sensor. The operator can pay attention to the temperature on the host computer at any time. Once the temperature is abnormal, an alarm can be issued in time , to avoid damage to the transformer due to insufficient attention to the temperature, but manual operation is still required, and the transformer needs to be turned off when the temperature is abnormal to avoid damage

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