Future research and development of electronic transformers

Electronic Transformer Products There are three types of electronic transformer products: 1) Electronic current and voltage transformers for GIS The electronic current and voltage transformers for GIS are installed on two sides of the switch fracture. Each transformer consists of two independent sensors and their corresponding sensing modules. Each set of sensors includes a capacitive voltage divider, a low-power core coil, and an air-core coil. 2) Open-type independently installed electronic current and voltage transformers Independently installed electronic current and voltage transformers include two independent sets of sensors and their corresponding sensing modules. Each set of sensors includes a capacitive voltage divider, a low-power core coil, and an air-core coil. 3) Low-power transformer (LPCT) The economics and advantages of the electronic current-voltage transformer are proportional to the voltage level, because only on the high-voltage transformers, CT saturation, complex insulation, bulky, high cost disadvantages The more pronounced it is. Therefore, electronic transformers should not be blindly promoted and applied at all voltage levels in substations. We believe that it is unnecessary and uneconomical to use electronic transformers below 110kV, especially for 10-35kV. The use of LPcr (Low Power Transformer) is a realistic and economical solution.

In the future R&D direction sensing passivation: Since passive sensing methods have technological advantages, stand-alone ECT sensing components will tend to be passivated. This includes active sensors that will be self-powered by escaping external sources of dependence. To quasi-passivation, the average life cycle of electronic transformers will reach more than 10 years. The optical sensor is practical by improving its measurement performance, simplifying the system structure, lowering the cost.

Structural composition: Utilizing the advantages of electronic micro power and miniaturization, transformers are more modularly combined in transformers, fully-enclosed combination appliances, isolated knives and other combined appliances to reduce land occupation and cost, and can also be promoted through functional reuse. The miniaturization and intelligence of an electric appliance itself. Various programs will exert their advantages while also combining with each other's advantages. In addition to various independent and enclosed current-voltage combination transformers, LPCT/ROG-CT and optics are expected to appear in the next few years. Combined current transformers.

Function Reuse: Make full use of the advantages of data sharing, single-point test, multi-point sharing, and transformers provide different types of digital interfaces such as Goose, RS485, and MU, which can be shared by multiple measurement and control devices to reduce multi-point repeated installation of transformers. , Make the device configuration more compact.

Standardization of components: The standardization of transformer components makes it universal and interchangeable. It can be used as a standard accessory to be installed in various primary devices. The transformers of different manufacturers can be replaced and interchanged.