Intelligent switch large-power current source system for electronic transformer

An electronic transformer and intelligent switch technology, applied in the direction of converting AC power input to AC power output, output power conversion devices, electrical components, etc., can solve the problems of test equipment, no transient characteristics, etc., to achieve safety , the effect of ensuring safety and improving the technical level

Inactive Publication Date: 2018-04-10
CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no equipment capable of testing transient characteristics on site

Method used

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  • Intelligent switch large-power current source system for electronic transformer

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Embodiment Construction

[0027] The invention provides an intelligent switch high-power current source system for an electronic transformer, which realizes the technical effect of testing the steady state and transient characteristics of the electronic transformer.

[0028] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the condition of not conflicting with each other, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0029] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from the scope of this description. Therefore, the protection scope of the present invention...

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Abstract

The invention discloses an intelligent switch large-power current source system for an electronic transformer. The system comprises a three-phase rectifier circuit, an IGBT array inverter circuit anda current closed-loop control circuit. The three-phase rectifier circuit and the current closed-loop control circuit are connected with the IGBT array inverter circuit; the three-phase rectifier circuit carries out rectification, energy storage and voltage reduction processing on externally-input three-phase alternating current, and provides a DC bus voltage for the system; the stored electric energy is subjected to SPWM modulation through the IGBT array inverter circuit to output a constant current; and the current closed-loop control circuit adjusts output voltage according to load change information and realizes a current closed-loop control strategy. The system realizes the technical effects of steady and transient characteristic test of the electronic transformer.

Description

technical field [0001] The invention relates to the field of intelligent switch high-power current sources, in particular to an intelligent switch high-power current source system for electronic transformers. Background technique [0002] Smart substation is an inevitable trend in the development of substations in the future. In the new generation of smart substations, all primary AC signals are digitized on the primary side. The electronic transformer has been completely changed in the primary equipment. Therefore, the accurate, safe and stable operation of the electronic transformer is related to the safety and stability of the smart substation. [0003] According to the test requirements for the steady-state characteristics of electronic transformers in JJG1021, the error test must be completed on site according to the verification points. Due to the limitation of on-site power supply capacity, current booster capacity and transformer capacity, it is generally difficult ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458H02M1/092
CPCH02M1/092H02M5/458H02M1/0009H02M1/0012
Inventor 杨红权程华刘彦琴董青迅胡祥胜
Owner CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER
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