Introduction and performance characteristics of Air-cooled Transformer

In life, an Air-cooled Transformer is often used. Air-cooled Transformers are the main transformers in power systems with a capacity of 60MVA and above. Next, let's take a look at the introduction and performance characteristics of the Air-cooled Transformer.

Here is the content list:

l Introduction of Air-cooled Transformer.

l The performance characteristics of Air-cooled Transformer.

Introduction of Air-cooled Transformer.

The new fuel supply method of Air-cooled Transformer not only has obvious benefits but also the complexity of the operation and the workload of operators will not increase after the system is improved. Start the sealed oil pump before starting the unit. After the unit runs normally, put in the III injector and stop the sealed oil pump. The unit is ready to shut down, start the sealed oil pump, and exit the injector. If you want to switch the sealed oil pump to the Ⅲ injector, first open the air and hydrogen side sealed fuel connection doors. Secondly, open the Ⅲ injector in and out of the throttle. At this time, pay attention to the oil pump recirculation valve to maintain the sealing oil pressure. Then open the sealed fuel tank to the manual valve of the Ⅲ injector and the hydrogen oil separator to the manual valve of the Ⅲ injector. After the Ⅲ injector is put in, stop the air and hydrogen side sealed oil pumps, and gradually open the Ⅲ injector inlet throttle to maintain the normal operating pressure, pay attention to adjust the oil level of the sealed oil tank during the switching process.

Air-cooled Transformer cooling control devices currently mostly adopt the traditional relay control mode, which drives the coil of the AC contactor through the opening and closing of the mechanical contacts of the temperature controller, thus connecting the working circuit of the cooler, and realizing a short circuit with a thermal relay, overload, lack of equal protection. This mode has complex circuits, a high device failure rate, and many defects. The conventional temperature controller has few contacts, small capacity, and large error. The AC contractor that controls the working circuit of the cooler starts frequently, and the contacts are easy to burn, resulting in poor contacts or sticking. Become a non-negligible factor for the lack of phase or insulation damage of the motor.

The performance characteristics of Air-cooled Transformer.

The main reason why the Air-cooled Transformer can be widely used today is that it has many advantages compared with other transformers: first, the Air-cooled Transformer has sufficient main and longitudinal insulation margins. Second, low stray loss, high efficiency, and no local overheating. Third, the structure of the oil circuit is reasonable, and there is no oil flow. The amount of partial discharge is low. Fourth, the cabinet has a reasonable structure and a beautiful appearance. Fifth, the Air-cooled Transformer has strong short-circuited resistance.

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