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Nuclear phase device for GIS substation lines

A technology for substations and lines, which is applied in the field of substation line nuclear phase devices and GIS substation line nuclear phase devices. It can solve problems such as inability to complete nuclear phase work, failure to perform tests, personal electric shock injuries, etc., and achieve small angle difference and phase shift. Small, good anti-interference ability effect

Pending Publication Date: 2019-03-19
DANDONG ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When conducting phase verification of transmission lines between two open substations, the conventional method of short-circuiting the line at one end of one substation to ground, and measuring the insulation resistance of the lines at one end of the other substation to the ground is used to complete the phase verification of the line. This method cannot be used for the nuclear phase of transmission lines between fully enclosed GIS substations and between two GIS substations. The main reason is that the electrical equipment of GIS substations is directly or indirectly sealed in the pipeline composed of metal pipes and casings. , no switches, lines and terminals can be seen from the outside, and the phase verification work cannot be completed by the existing method; in addition, because the lines erected on the same pole will cause high induced voltage and large induced current, conventional manual measurement of insulation The resistance method poses a serious risk of personal injury from electric shock and therefore cannot be tested

Method used

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  • Nuclear phase device for GIS substation lines
  • Nuclear phase device for GIS substation lines
  • Nuclear phase device for GIS substation lines

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 1 with 2 As shown, the signal transmitter 1 is a high-frequency signal generator, and the outside is provided with a transmitter display screen 11, a transmitter control button 12, a transmitter output interface 13 and a transmitter charging interface 14, and the inside includes a power amplifier, a transmitting device, a rectifier device, high-frequency oscillator, control device, power supply device and display device, etc., which adopt the principle of pulse current to inject high-frequency pulse coded current signals into the circuit, and the current generates an electromagnetic field around the target circuit for the signal receiver 2 and the flexible coil 3. Perform detection, decoding, and nuclear phase; because the current has directionality, the detection also has directionality; because there may be high induced voltage and induced current in the phase-to-phase line, it is impossible to directly inject the pulse-encoded current signal into the t...

Embodiment 2

[0022] Such as image 3 with Figure 4 As shown, the flexible coil 3 is provided with a notch, and the notch is provided with a lock 31, which is inserted into the coil access port 25 through the coil lead wire 32. The flexible coil 3 has excellent transient tracking ability and can quickly identify the signal transmitter 1. The high-frequency pulse coded current signal, because the flexible coil 3 is made of flexible material, it is suitable for thick cables or conductors with irregular shapes. It is not necessary to disconnect the line under test, and it adopts non-contact measurement, which is safe and fast. The outside of the signal receiver 2 is provided with a receiver display screen 21, a receiver control button 22, a voltage input jack 23, a charging interface 2 and a coil access port 25, and the inside of the signal receiver 2 includes a frequency selection filter, a display device, a signal The acquisition processor, control device, anti-interference device and pow...

Embodiment 3

[0024] Such as Figure 5 As shown, for the transformation of the power grid of the 220kV Baoshishan GIS substation, it is necessary to carry out line phase verification on the Danbao line. For the high-frequency pulse coded current signal, the flexible coil 3 is sequentially placed on the high-voltage grounding terminal of the voltage transformer of the Baoshishan GIS substation. The measurement does not change any terminal, and the value of the signal is displayed on the display screen 21. Through analysis and comparison of the GIS voltage transformer The size of the high-voltage grounding terminal signal, the largest data is the phase A line of the injected signal, and the phase B and C phases are measured in the same way, so as to complete the line verification work of the Danbao line.

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Abstract

The invention relates to a nuclear phase device for substation lines and particularly relates to a nuclear phase device for GIS substation lines, which comprises a signal transmitter and a signal receiver. The signal receiver is connected with a flexible coil in a plugging mode through a coil lead. The flexible coil is provided with a gap, wherein a lock catch is arranged at the gap. The signal transmitter which is arranged on one end of a line transmits high frequent signals. The flexible coil is connected with a grounding end through a voltage transformer arranged at the other end of the line by the gap and induces the high frequent signals sent by the signal transmitter. Then the flexible coil amplifies through the signal receiver and displays in the form of numerical values to carry out the nuclear phase. The nuclear phase device for the GIS substation lines has the advantages of convenient use, safety and reliability, simple operation, easy transportation, strong ability in anti-interference, accurate nuclear phase in an environment with high induced voltage and high induced current, fast response, no saturation, small angle error, high measuring accuracy and small phase shift. The nuclear phase device for the GIS substation lines has wide range of frequency parts and ample output signals, which effectively solves the difficulty of the nuclear phase for the GIS substationlines.

Description

technical field [0001] The invention relates to a phase nuclear device for substation lines, in particular to a phase nuclear device for GIS substation lines, which belongs to the field of electric power applications. Background technique [0002] In the high-voltage transmission line, in order to eliminate the unbalanced voltage of the line, the line needs to be cross-transposed, so the new high-voltage transmission line needs to check the phase to determine whether the phase of the line is correct. When conducting phase verification of transmission lines between two open substations, the conventional method of measuring the insulation resistance of the lines at one end of one substation to the ground is usually used to complete the line verification. However, for open substations and This method cannot be used for the nuclear phase of transmission lines between fully enclosed GIS substations and between two GIS substations. The main reason is that the electrical equipment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/18
CPCG01R29/18
Inventor 许建春贾振陆于鑫江玲张猛子宋晓东陈润晶李照华庄旭宋丽
Owner DANDONG ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
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