Three-phase integrated electronic transformer

Abstract

The invention relates to a three-phase integrated electronic transformer, comprising a main body and a signal converter box connected with the main body, wherein a three-phase measuring component is poured in the main body, the three-phase measuring component comprises a voltage sensor and a current sensor, and a signal conversion module is mounted in the signal converter box. The three-phase integrated electronic transformer provided by the invention adopts an integral structure, is integrated with the functions of measuring three-phase current, three-phase voltage, zero-sequence current and zero-sequence voltage, simple in structure, convenient to mount and is simple to maintain; signal output adopts a small-signal current ring mode and is strong in anti-jamming capability; and the voltage sensor and the current sensor respectively adopt a Rogowski coil and a capacitive voltage sensor, the hysteresis effect and saturation phenomenon of a traditional electromagnetic transformer are avoided, and the high-precision measurement demand can be met.

Description

technical field [0001] The invention relates to a three-phase integrated electronic transformer. Background technique [0002] In the current and voltage measurement devices commonly used in power systems, voltage and current sensors are widely used as the main parameter measurement methods of power grid parameters. With the continuous enrichment of protection functions and the continuous improvement of reliability requirements, power systems no longer rely solely on current Transformers are used to provide measurement and protection signals. Measurement and protection devices need to collect multiple measurement signals such as three-phase current, three-phase voltage, zero-sequence current, and zero-sequence voltage. The current common solution is to use voltage transformers and current transformers respectively. Switches, zero-sequence voltage transformers, and zero-sequence current transformers measure their respective power signals, which makes the switchgear bulky, com...

AI Technical Summary

Problems solved by technology

[0002] In the current and voltage measurement devices commonly used in power systems, voltage and current sensors are widely used as the main parameter measurement methods of power grid parameters. With the continuous enrichment of protection functions and the continuous improvement of reliability requirements, power systems no longer rely solely on current Transformers are used to provide measurement and protection signals. Measurement and protection devices need to collect multiple measurement signals such as three-phase current, three-phase voltage, zero-sequence current, and zero-sequence voltage. The current common solution is to use voltage transformers and current transformers respectively. Switchgear, zero-sequence voltage transformer, and zero-sequence current transformer measure their respective power signals, which makes the switchgear bulky, complicated wiring, and high cost

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