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A Variable Voltage Level Current Disturbance Source

A technology of voltage level and current disturbance, which is applied to the components of electrical measuring instruments, measuring electrical variables, and AC networks to reduce harmonics/ripples, etc. It can solve problems such as single voltage levels, improve control accuracy, and reduce construction costs. Cost, the effect of reducing the output ripple voltage

Active Publication Date: 2016-09-14
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a current disturbance source with variable voltage level to solve the problem that the voltage level of the existing power quality test system is too single

Method used

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  • A Variable Voltage Level Current Disturbance Source
  • A Variable Voltage Level Current Disturbance Source
  • A Variable Voltage Level Current Disturbance Source

Examples

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Embodiment Construction

[0024] The present invention will be described in detail below with reference to the drawings and specific embodiments:

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

[0026] Such as figure 2 As shown,...

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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 testing of reactive power compensation and harmonic control equipment for distribution networks, and relates to a current disturbance source generating device, in particular to a current disturbance source with a variable voltage level. Background technique [0002] Modern power system loads are characterized by 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), and impact (electrified railway and Urban rail transit) and other characteristics. Loads with these characteristics will seriously affect the power quality of the current grid, shorten the service life of equipment, increase 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 fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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