Master-slave trimming resistance type arc suppression coil

A technology of arc-suppression coil and main coil, which is applied in the direction of electrical components, circuit devices, emergency protection circuit devices, etc., can solve the problems of arc-suppression coils with limited arc-extinguishing ability, harmonic cost, capacity limitation, etc., and achieve arc-suppression performance Excellent, improved automation level, and wide application range

Inactive Publication Date: 2004-06-30
杨以涵 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these arc-suppression coils have been improved in some aspects, they also have certain problems, such as capacity limitations, c

Method used

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  • Master-slave trimming resistance type arc suppression coil
  • Master-slave trimming resistance type arc suppression coil

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0021] As shown in Figure 2, the arc suppression coil automatically detects the operating state of the power grid online to obtain power grid parameters, tracks and calculates the line-to-ground capacitance and the detuning degree of the power grid in real time, and adjusts (L) according to the grid-to-ground capacitance current z ) The main arc suppression coil (F1...Fm) tap is preset to a certain tap Fx to reach the over-compensation point required by the system and realize the pre-adjustment function of the arc suppression coil. When a single-phase ground fault occurs, select 2 according to the actual ground current value n One of these combinations, the control circuit can quickly and finely adjust (L, 2×L, ... 2) by controlling the action of the electronic switch (K1, K2, K3...Kn). n-1 ×L) Each fine-tuning arc suppression coil unit can adjust the compensation accuracy to quickly reach or close to full compensation, and realize the follow-up function of the arc suppression coi...

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PUM

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Abstract

The invented automatic arc extinction device grounded in single phase utilized in power network of electric system is a control system composed of the circuit for measuring current of earth capacitance, arc suppression reactor, regulation control circuit, and driving protective circuit. The control system measures current value of earth capacitance from neutral point through grounding system with arc extinguishing coil regularly, and adjusts tap joint position of major arc winding automatically. When singlephase earth fault happens, combination states of secondary arc winding are adjusted and controlled automatically so as to compensate capacitance current. The invention possesses features of high response speed and precision, safe and reliable and less investment. The invented device is applicable to 3-66kV grounding system from neutral point through arc winding.

Description

Technical field: [0001] The invention is used for the neutral point grounding system of 3-66kV through the arc suppression coil. Background technique: [0002] With the development of the economy, the expansion of the scale of the power system, the increase in the length of the lines in the system and the increase and lengthening of the power cable lines, the capacitance current to the ground of the power grid has increased significantly, and the capacitance current value has become larger and larger, many 6~10kV The capacitive current of the power system has reached 50A, and the capacitive current of the 66kV power system is even larger. When a single-phase ground fault occurs in the neutral point ungrounded power grid, the arc at the fault point may not be effectively extinguished. Even if the arc can be extinguished automatically, it must take a long time, which may cause the fault to expand and form a disconnection fault or a permanent ground fault. , more serious is th...

Claims

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Application Information

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IPC IPC(8): H02H9/08
Inventor 杨以涵谭伟璞连鸿波李文锋曲轶龙
Owner 杨以涵
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