Method for testing wiring of secondary circuits of four-star voltage transformers

A technology of voltage transformers and testing methods, which is applied in the parts, instruments, measuring electricity and other directions of electrical measuring instruments, can solve the problems of error-prone, low work efficiency and high misjudgment rate.

Active Publication Date: 2014-08-06
CHANGZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER +2
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  • Application Information

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Problems solved by technology

The disadvantage of using the traditional test method is that this method has high requirements on the quality of on-site test personnel, and requires the test perso

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  • Method for testing wiring of secondary circuits of four-star voltage transformers
  • Method for testing wiring of secondary circuits of four-star voltage transformers
  • Method for testing wiring of secondary circuits of four-star voltage transformers

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Embodiment Construction

[0063] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0064] See figure 1 , the four-star voltage transformer secondary circuit wiring test method of this embodiment is tested by using a self-made tester. The self-made tester is mainly composed of a primary side device 1, a secondary side device 2 and a power module. The power module is in figure 1 Not shown in the figure, the power supply module has a power supply output terminal; the power supply output terminal of the power supply module outputs +5V direct current, which is used as the working power supply of the system.

[0065] The primary device 1 is mainly composed of a voltage generating circuit 11 , a controller 12 , a first wireless communication module 13 and a signal conditioning circuit 14 . The voltage generating circuit 11 is provided with a voltage input terminal, a voltage output terminal, a drive signal input termi...

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Abstract

The invention provides a method for testing wiring of secondary circuits of four-star voltage transformers. The method is implemented by the aid of a special tester. The tester comprises a primary-side device and a secondary-side device. The method for testing the wiring of the secondary circuits includes a three-phase voltage process and a single-phase voltage process, and mainly includes steps of selecting the testing processes; correspondingly applying three-phase asymmetric voltages or single-phase voltages to the voltage transformers according to the three-phase voltage process or the single-phase voltage process; acquiring secondary-side voltage parameters of the voltage transformers; automatically judging the sampled secondary-side voltage parameters of the voltage transformers by the aid of built-in programs and criteria of an information processor of the secondary-side device and displaying test results via a liquid crystal display. The method has the advantages that whether wiring of the secondary circuits of the voltage transformers is correct or not and error types of wiring of the secondary circuits of the voltage transformers can be automatically judged by the aid of the method and can be tested and judged quickly and accurately, the accuracy is high, and the work efficiency can be improved; the test results are verified by one another by the aid of the three-phase voltage process and the single-phase voltage process and accordingly are reliable.

Description

technical field [0001] The invention relates to a detection method of a voltage transformer in a power supply system, in particular to a method for testing whether the polarity connection of a secondary circuit of a four-star voltage transformer is correct or not. Background technique [0002] In the 10kV system of the power supply grid, in order to eliminate the adverse effect of ferromagnetic resonance on the voltage transformer, the three-phase four-star voltage transformer (referred to as three-phase four PT) has been widely used. The wiring method in the application is as follows: Figure 4 shown. Before the voltage transformer is put into operation, it is necessary to test the correctness of the wiring of the secondary circuit of the voltage transformer to ensure that the wiring of the secondary circuit is correct, otherwise it will cause problems such as malfunction of the protection device and directly affect the safety and stability of the power system run. For the...

Claims

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Application Information

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IPC IPC(8): G01R31/02G01R29/18G01R1/28
Inventor 褚国伟张关应周维明徐凯猛曹良
Owner CHANGZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER
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