Variable voltage grade type current disturbance source

A technology of voltage level and current disturbance, applied in parts of electrical measuring instruments, measuring electrical variables, AC network to reduce harmonics/ripples, etc. It can solve problems such as single voltage level, improve control accuracy and reduce construction costs. cost, the effect of reducing the output ripple voltage

Active Publication Date: 2015-06-10
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a current disturbance source with variable vol...

Method used

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  • Variable voltage grade type current disturbance source
  • Variable voltage grade type current disturbance source
  • Variable voltage grade type current disturbance source

Examples

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Embodiment Construction

[0024] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0025] like figure 1 , The present invention provides a distribution network current disturbance source with variable voltage level, including charging resistor R1 and bypass switch KM-BP, rectifier transformer tap contactors KM1, KM2...KMn, rectifier Transformer, back-to-back power unit and output filtering unit; the primary winding of the rectifier transformer is a multi-tap winding, the secondary winding of the rectifier transformer is a multi-winding structure, each secondary winding is connected to a back-to-back power unit, and the input of the current disturbance source is connected to three-phase The AC charging system has a fixed bus voltage value; the output of the current disturbance source is connected to a three-phase variable voltage system, and the bus voltage value is not fixed and can be divided into several levels.

[0026] like...

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Abstract

The invention provides a variable voltage grade type current disturbance source. The variable voltage grade type current disturbance source comprises a charging resistor R1, a bypass switch KM-BP of the charging resistor R1, contactors KM1, KM2...KMn for switching a rectifier transformer tapping point, a rectifier transformer, back-to-back power units and a filtering unit which are sequentially connected; a primary winding of the rectifier transformer is a multi-tapping-joint winding, and secondary windings of the rectifier transformer are of multi-winding structure; each secondary winding is connected with one back-to-back power unit; the charging resistor is connected with a three-phase AC charging system; the filtering unit is connected with a three-phase AC system. The current disturbance source can be applied to the field of detection of an electricity energy quality testing system and other electricity energy quality treatment devices, and the outputted variable voltage can synchronously provide current disturbance to the electricity energy quality testing detecting systems at a plurality of voltage grades.

Description

technical field [0001] The invention belongs to the field of performance inspection of power distribution network reactive power compensation and harmonic control equipment, and relates to a current disturbance source generating device, in particular to a current disturbance source with variable voltage levels. Background technique [0002] Modern power system load presents the characteristics of diversity and complexity, which can be attributed to high harmonic content (rectifier equipment), low power factor (three-phase induction motor), power fluctuation (electric arc furnace), shock (electrified railway and urban rail transit). Loads with these characteristics will seriously affect the power quality of the current power grid, shorten the service life of equipment, increase power grid losses, reduce yield, etc., and even endanger the normal operation of the power system in severe cases. [0003] At present, the problem of power quality has received widespread attention f...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/01
CPCG01R1/28Y02E40/30Y02E40/40
Inventor 苟锐锋孙广星张万荣孙伟李佩泫杨涛高中滢
Owner CHINA XD ELECTRIC CO LTD
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