Kerui Transformer: The important role of electronic transformers in intelligent substation
Transformers play an important role in many industrial fields and are an indispensable part, especially in today's power systems. Electronic transformers have many advantages, such as reliable insulation, computerized development, light weight, and volume. Xiao et al. will be widely used in the digital transformation of substations, which is one of the symbols that optoelectronic technology is increasingly used in power systems. In today's digital and intelligent transformation of substations, the rational use of electronic transformers is the key to the success of the transformation.
What is an electronic transformer?
It is a device consisting of one or more voltage or current sensors connected to a transmission system and a secondary converter for transmitting a quantity proportional to the quantity being measured, to a measuring instrument, a meter and a relay protection or control device. In the case of a digital interface, a group of electronic transformers share a single unit to perform this function.
Advantages of electronic transformers
In the construction and transformation of substations today, intelligence, digitization and automation have gradually become the main construction trend. The intelligent system has been continuously developed. The traditional equipment has been slowly replaced with advanced equipment. However, the ordinary electromagnetic transformer equipment can not properly cooperate with the operation of the substation, which makes the substation intelligent into the bottleneck.
The electronic transformer has the latest power development technology, has good stability, and can play an important role in the process of intelligent substation. Its role is obvious to all, and it is gradually discovered by the substation builders.
Electronic transformers play an important role mainly in secondary circuits and relay protection. The following are specific application methods.
Application of electronic transformer in secondary circuit
Applying an electronic transformer to the secondary circuit can reduce the use of cable lines, save resources, and reduce costs. In the process of substation construction, the use of optical cable for signal transmission, and to ensure the control of the interval and the compact design of the substation, the safety and reliability of the substation system can be successfully improved.
Application of Electronic Transformer in Relay Protection
In the power system, for electronic transformers, the main concern is the accuracy performance such as amplitude error and angular error of the data channel of the electronic transformer. ZLG Zhiyuan Electronic DT6000 series intelligent substation optical digital tester can analyze the sampling information of electronic transformer such as IEC61850-9-1/2, FT3, measure the data on the electronic transformer, and analyze the precision of the electronic transformer. performance.
Based on IEC61850 standard, DT6000 series intelligent substation optical digital tester is widely used in intelligent substation handheld test instruments with voltage levels of 110kV and above. It is used for quick debugging of protection and monitoring devices, intelligent terminals, merging units and transformers in intelligent substation. To facilitate the establishment and maintenance of intelligent substations.
The electronic transformer has a good corresponding ability, and according to the relevant principle of the protection action, since the conventional CT frequency response range is too narrow, it is difficult to perform one-time reproduction of the current waveform. The electronic transformer has a wide frequency response range, which can provide a complete reflection for the high-frequency signal, provide a basis for protecting the action, ensure the accuracy of the action, and the application of the electronic transformer effectively promotes the development of the sampling value differential principle. In general, electronic transformers increase the efficiency and measurement range of relay protection systems, enabling digital signals to achieve trouble-free interconnection.
Transformers play an important role in many fields, such as substations, power transmission systems, etc., which are indispensable parts of various industries. In today's well-developed market, the choice of brand is worthy of serious consideration.
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