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Apparatus and method for reactive power compensation of test transformer

A technology for testing transformers and power compensation, applied in reactive power adjustment/elimination/compensation, reactive power compensation, transformer/inductor circuits, etc., can solve problems such as "field" testing of power transformers, and achieve component size reduction Effect

Inactive Publication Date: 2013-10-23
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The problem with all prior art solutions is that direct "field" testing of power transformers over a large voltage and frequency range is currently not possible with known equipment

Method used

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  • Apparatus and method for reactive power compensation of test transformer
  • Apparatus and method for reactive power compensation of test transformer
  • Apparatus and method for reactive power compensation of test transformer

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Experimental program
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Embodiment Construction

[0036] figure 1 A general wiring diagram of the advantageous device is shown. Connect the test circuit to an external power source, especially a 400V, 1500A AC power source, by means of the main switch 9 . With the aid of a converter or frequency converter 10 , the three-phase AC voltage is converted into a DC voltage for the electric motor 5 . The electric motor is used to drive a generator 6 which directly generates the corresponding generator voltage with a predeterminable test frequency or, if the corresponding generator voltage is insufficient, converts the generator voltage to the test frequency by means of a matching transformer 8 Voltage. Adjustable reactor 2a in figure 1 In the example shown, three capacitor stages 3 a , 3 b , 3 c in the test circuit 11 are connected. By means of the power switch 7 , it is possible to close the switch 7 and thus likewise the test circuit 11 at the rotational speed occurring at the generator 6 and thus as an equivalent of the gener...

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PUM

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Abstract

An apparatus and a method for reactive power compensation of a test transformer with an inductor and a stepped capacitor bank and a generator. The generator is used for generating a generator current and a generator voltage with a predeterminable test frequency. The inductance of the inductor can be set and can be interconnected with a stepped capacitor bank in such a way that the generator can be operated on virtually exclusive active power. Within the test circuit, the generator is therefore almost always set at an optimum operating point for testing of the test transformer and does not need to be dimensioned to be any larger than required. As a result, the power of the generator can be used in optimum fashion for generating the generator voltage and, as a result of the reduction in the component part sizes which is carried out on the essential components in the test circuit, enables the mobile use of the entire apparatus for in-situ testing of the power transformer to be tested.

Description

technical field [0001] The invention relates to a device and a method for reactive power compensation of a test transformer with a reactor and a generator for generating a generator current and a generator voltage with a predeterminable test frequency. Background technique [0002] Power transformers are developed and manufactured based on the power specifications required by mains and mains network operators for each individual case. Within the scope of this development and manufacturing process, the power transformer should meet specific power requirements, which are checked and verified by means of so-called test devices. At the end of the manufacturing process, the power transformer is checked as a test transformer in a fixed test rig with regard to the power characteristics of the power transformer. Here, the voltage resistance is tested, for example, by carrying out an induced alternating voltage withstand test. [0003] Due to national and international norms or sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H01F27/42
CPCH02J3/1828Y02E40/30
Inventor 简-雷纳.莫肯豪普特
Owner SIEMENS AG