Voltage sag generation unit and voltage sag generator

A voltage sag, generating unit technology, applied in the parts, instruments, measuring electricity and other directions of electrical measuring instruments, can solve the problems of bulky, fussy, and large size of high-power voltage sag generators, so as to improve the adaptability to different tests. The ability to demand, the effect of improving flexibility

Pending Publication Date: 2019-05-10
GUANGDONG POWER GRID CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] This application provides a voltage sag generating unit and a voltage sag generator, which solves the technical problems t...

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  • Voltage sag generation unit and voltage sag generator
  • Voltage sag generation unit and voltage sag generator
  • Voltage sag generation unit and voltage sag generator

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Embodiment Construction

[0030] The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0031] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a spec...

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Abstract

The invention discloses a voltage sag generation unit. The voltage sag generation unit comprises a three-level PWM rectifier module, a bidirectional DC-DC conversion module and a three-level invertermodule; the bidirectional DC-DC conversion module comprises a first bidirectional DC-DC converter and a second bidirectional DC-DC converter, both of which are in the isolation type; the primary negative pole of the first bidirectional DC-DC converter is connected with the primary positive pole of the second bidirectional DC-DC converter, so that a primary zero-level end of the bidirectional DC-DCconversion module is formed; the accessory negative pole of the first bidirectional DC-DC converter is connected with the accessory positive pole of the second bidirectional DC-DC converter, so thatan accessory neutral point end of the bidirectional DC-DC conversion module is formed; the primary side of the bidirectional DC-DC conversion module is connected with the three-level PWM rectifier module; and the accessory side of the bidirectional DC-DC conversion module is connected with the three-level inverter module. The technical problems that the existing high-power voltage sag generator isheavy, huge in volume and fussy in single-phase voltage sag test can be solved. The invention further discloses a voltage sag generator.

Description

technical field [0001] The present application relates to the technical field of electric power testing, in particular to a voltage sag generating unit and a voltage sag generator. Background technique [0002] With the development of electric power, the power quality problem has gradually attracted people's attention, and the voltage sag is an important part of the power quality problem. Voltage sag refers to the situation that the effective value of the output voltage suddenly drops in a certain period of time, and after a period of time, it finally returns to the normal output voltage. Obviously, once this happens, it will have an impact and impact on the normal operation of power equipment. For this reason, it is necessary to carry out the simulation test of voltage sag on the power equipment. [0003] Existing high-power voltage sag generators are usually equipped with power frequency transformers on the rectification side to form fault isolation, but the addition of ...

Claims

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Application Information

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IPC IPC(8): G01R1/28
Inventor 马明徐柏榆梁晓兵雷二涛王玲刘军邓志
Owner GUANGDONG POWER GRID CO LTD
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