Resonant grounding power grid automatic tuning compensation device

An automatic tuning and compensation device technology, applied in circuit devices, emergency protection circuit devices, frequency measurement devices, etc., can solve problems such as low measurement accuracy, complicated test process, and limited anti-interference ability, and achieve high control accuracy and test speed Fast, optimally compensated results

Inactive Publication Date: 2016-12-28
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the indirect measurement method is also used to adjust the detuning degree of the arc suppression coil, resulting in low measurement accuracy, complicated test process and limited anti-interference ability

Method used

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  • Resonant grounding power grid automatic tuning compensation device
  • Resonant grounding power grid automatic tuning compensation device
  • Resonant grounding power grid automatic tuning compensation device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The method for automatically measuring the degree of detuning when the grounded power grid resonates with the automatic tuning and compensation device for the resonant grounded power grid of the present invention is as follows.

[0030] image 3 It is the equivalent circuit diagram of the PT low-voltage side when testing the detuning degree of the resonant grounded power grid. In the figure, C', L', r', Respectively, the total distributed capacitance C of the three-phase wires to the ground, the arc suppression coil inductance L, and the ground damping resistance R Z And the grid neutral point displacement voltage when the fault occurs Converted to the value of PT low pressure side; For the frequency sweep signal source voltage controlled by the microcomputer control device 3; R Q It is the sampling resistor, its value is 1Ω / 5W, R Z For the current limiting resistor, its value is 300Ω / 300W.

[0031] The parameters of the grounding damping resistance can be calcu...

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PUM

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Abstract

The automatic tuning and compensation device for the resonant grounded power grid of the present invention relates to the automatic measurement of the detuning degree when the grounded power grid resonates. , the neutral point of the Z-type grounding transformer is connected to one end of the turn-adjusting arc suppression coil through a switch, the other end of the turn-adjusting arc suppression coil is connected to one end of the grounding damping resistor, the other end of the grounding damping resistor is grounded, and the grounding damping resistor is also connected to a switch Parallel connection, the microcomputer control device is connected with the short-circuit control device, the microcomputer control device is also connected with the remote end of the turn-adjusting arc suppression coil, and the short-circuit control device is connected with the switch connected in parallel with the grounding damping resistance. The invention has the advantages of fast test speed, accurate result, high control precision and good real-time performance, thereby ensuring the safe operation of the power grid.

Description

technical field [0001] The technical solution of the invention relates to the automatic measurement of the degree of detuning when the grounded power grid resonates, specifically an automatic tuning and compensation device for the resonant grounded power grid. Background technique [0002] The meaning of tuning is to adjust the detuning degree v of the arc suppression coil to represent the degree of deviation from the resonance state, which can be used to describe the compensation degree of the arc suppression coil. The value of the detuning degree should be selected appropriately. On the one hand, the reduction of the detuning degree can not only reduce the residual current in the single-phase grounding arc, but also accelerate the rising speed of the recovery voltage, so it can be seen that the smaller the detuning degree, the better ; But on the other hand, the reduction of detuning degree will increase the number of arc suppressing coil taps, increase the complexity of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/08H02H9/04G01R23/02
Inventor 韩叶张惠娟韩雪莹申晨曹向伟藏晨静冯垚
Owner HEBEI UNIV OF TECH
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