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Compound power filter test device and method

A technology of power filtering and test equipment, applied in the direction of measuring equipment, measuring electricity, measuring electrical variables, etc.

Inactive Publication Date: 2011-03-30
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This unchangeable circuit structure makes it difficult to manually disassemble and reassemble the circuit during the power filter test or test process

Method used

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  • Compound power filter test device and method
  • Compound power filter test device and method
  • Compound power filter test device and method

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Embodiment Construction

[0031] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific drawings.

[0032] figure 1 Shown is the circuit diagram of the composite power filter test device of the present invention, as figure 1 As shown, the composite power filter test device of the present invention includes a power supply terminal 15 and a load terminal 16 of an external non-linear electrical device to be tested, and the power supply terminal 15 and the load terminal 16 are respectively connected to the power supply terminal harmonic detection module 12 and the load terminal The harmonic detection module 13 also includes a series filter branch 6, and the series filter branch 6 is composed of an adjustable reactor 8 (L S is the inductance value, R S is the internal resistance value), an on-off switch 1 is arranged between the two ends of the series...

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Abstract

The invention discloses a compound power filter test device, comprising a power end and a load end of external nonlinear electrical equipment to be tested, a series filter branch and a parallel filter branch. One end of the series filter branch is connected with the power end, while the other end is connected with the load end. An on-off switch is arranged between the two ends of the series filter branch which can be short-circuited. One end of the parallel filter branch is respectively connected with the power end and the load end through the on-off switch, while the other end is grounded. A passive filter circuit of different structure can be obtained through the combination of different on-off switch states. The compound power filter test device and the compound power filter test method meet the requirements of engineering test of a passive power filter, can realize the purpose that one set of power filter test devices can finish multi-purpose power filter test.

Description

technical field [0001] The invention relates to a composite power filter test device and a method thereof. Background technique [0002] The extensive application of nonlinear electrical equipment, such as power rectifiers, inverters, variable frequency power supplies and other power electronic equipment, has caused the increasingly serious harm of harmonics in power systems. Usually, a passive power filter is connected to the power supply end or load end to realize power harmonic suppression or compensation in the steady state of the power system, and also to realize reactive power compensation through the passive power filter. [0003] The passive power filter is mainly composed of parallel filtering branches in structure, and different filtering branches filter out the corresponding high-order current harmonics. At present, in the engineering design of passive power filters, the filter branches mainly include: a single-tuned filter branch composed of capacitors and induc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 褚建新徐卫民牛王强黄辉高迪驹张燕
Owner SHANGHAI MARITIME UNIVERSITY
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