Unlock instant, AI-driven research and patent intelligence for your innovation.

Mutual inductor for latent current test

A technology of submerged current supply and transformer, applied in the field of transformer, can solve the problems of long extinguishing time and affecting the success rate of automatic reclosing

Inactive Publication Date: 2009-07-22
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The larger the submerged supply current, the longer the arc extinguishing time, which affects the success rate of automatic reclosing. Therefore, the submerged supply voltage of the transmission line must be measured and theoretically calculated for the transmission lines of high-voltage, ultra-high voltage and ultra-high voltage power grids.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mutual inductor for latent current test

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] A transformer for submerged current testing, which includes a primary coil 1, a secondary coil 2, an iron core 3, a resistor R4 and a high-power diode 5, and is characterized in that the iron core 3 is provided with a primary coil 1 and a secondary coil 2, The primary coil 1 is one turn, and one end of the secondary coil is connected to a fixed resistor R4, and the other end of the resistor R4 is connected to two parallel positive and negative high-power diodes 5, and the other end of the parallel positive and negative high-power diodes 5 is connected to two The other end of the secondary coil 2 is connected in parallel with an output terminal S at both ends of the high-power diode 5 1 , S 2 . S 1 , S 2 When in use, it is connected to a test instrument with a load of 1Ω.

[0010] The specific parameters are as follows: Iron core 3 is Φ160 / 200×30mm permalloy, primary coil 1 turn, secondary coil 2 is Φ2.0 copper wire 100t, resistance R4 is 1Ω, D 1 、D 2 It is a high-...

Embodiment 2

[0012] A transformer for submerged current testing, which includes a primary coil 1, a secondary coil 2, an iron core 3, a resistor R4 and a high-power diode 5, and is characterized in that the iron core 3 is provided with a primary coil 1 and a secondary coil 2, The primary coil 1 is one turn, and one end of the secondary coil is connected to a fixed resistor R4, and the other end of the resistor R4 is connected to two parallel positive and negative high-power diodes 5, and the other end of the parallel positive and negative high-power diodes 5 is connected to two The other end of the secondary coil 2 is connected in parallel with an output terminal S at both ends of the high-power diode 5 1 , S 2 . S 1 , S 2 When in use, it is connected to a test instrument with a load of 1Ω.

[0013] The specific parameters are as follows: Iron core 3 is Φ160 / 190×20mm permalloy, primary coil 1 turn, secondary coil 2 is Φ2.0 copper wire 200t, resistance R4 is 1Ω, D 1 、D 2 It is a high-...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
electrical resistanceaaaaaaaaaa
Login to View More

Abstract

The invention relates to a mutual inductor used for testing secondary-arc current, which comprises a primary coil (1), a secondary coil (2), a magnet core (3), a resistance R (4), and high power-diodes (5). The magnet core (3) is provided with the primary coil (1) and the secondary coil (2). The primary coil (1) has one turn. One end of the secondary coil is connected with the constant resistance R (4) and the other end is connected with the two positive and negative high-power-diodes (5) which are connected in parallel. The other ends of the two positive and negative high-power-diodes (5) connected in parallel are connected with the other end of the secondary coil (2). The two ends of the high-power-diodes (5) connected in parallel respectively guide one output ends S1 and S2. When the current of the primary coil of the mutual inductor is 2-40A, the current of the secondary coil is 20-400 mA. When the current of the primary coil is 20-100A, the current of the secondary coil is 100-500 mA and 0.5 level of measuring accuracy is required; when the current of the primary coil is 10000A, the mutual inductor does not be damaged.

Description

technical field [0001] The invention belongs to transformers, in particular to a transformer for submerged current testing. Background technique [0002] The submerged current in the high-voltage and ultra-high-voltage transmission lines of the power system, when a single-phase instantaneous ground fault occurs on the high-voltage line, the single-phase reclosing device trips the circuit breakers at both ends of the fault. Due to the capacitive and inductive coupling between the faulty phase and the two non-faulty phases, even if the faulty phase has been isolated from the system, the arc at the fault point cannot be extinguished quickly, and the residual current in the arc at the fault point is called the sneak current. The larger the submerged supply current, the longer the arc extinguishing time, which affects the success rate of automatic reclosing. Therefore, the submerged supply voltage of the transmission line must be measured and theoretically calculated for the tran...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/28G01R15/18
Inventor 杨杰张保国孟恒信赵屹涛刘愈倬侯春青
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER