CN202616767U - Intelligent comprehensive arc-extinction resonance-elimination overvoltage protection optimizing device - Google Patents

Intelligent comprehensive arc-extinction resonance-elimination overvoltage protection optimizing device Download PDF

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Publication number
CN202616767U
CN202616767U CN2012202629387U CN201220262938U CN202616767U CN 202616767 U CN202616767 U CN 202616767U CN 2012202629387 U CN2012202629387 U CN 2012202629387U CN 201220262938 U CN201220262938 U CN 201220262938U CN 202616767 U CN202616767 U CN 202616767U
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CN
China
Prior art keywords
overvoltage protection
voltage
overvoltage
resonance
vacuum contactor
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2012202629387U
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Chinese (zh)
Inventor
李红军
韩家永
成学英
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ZIBO LIANCHENG ELECTRIC POWER TECHNOLOGY CO LTD
Original Assignee
ZIBO LIANCHENG ELECTRIC POWER TECHNOLOGY CO LTD
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Priority to CN2012202629387U priority Critical patent/CN202616767U/en
Application granted granted Critical
Publication of CN202616767U publication Critical patent/CN202616767U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to an intelligent comprehensive arc-extinction resonance-elimination overvoltage protection optimizing device and belongs to the technical field of power-grid protection equipment. The intelligent comprehensive arc-extinction resonance-elimination overvoltage protection optimizing device is characterized by comprising a cabinet body. A partition switch, a PT (potential transformer) resonance eliminator, a high-capacity comprehensive overvoltage protector, a single-phase vacuum contactor and a high-voltage current limit fuse are arranged in the cabinet body, an intelligent controller is mounted on a front door of the cabinet body, the partition switch is respectively connected with the PT resonance eliminator, the high-capacity comprehensive overvoltage protector and the high-voltage current limit fuse, the high-voltage current limit fuse is connected with the single-phase vacuum contactor, and the intelligent controller is respectively connected with the PT resonance eliminator and the single-phase vacuum contactor. By the aid of the intelligent comprehensive arc-extinction resonance-elimination overvoltage protection optimizing device, rising leading edge of overvoltage can be effectively alleviated, voltage peak is smoothed, ultralow frequency oscillation current is suppressed, frequent fusing of a fuse can be eliminated, and arc earthing overvoltage is effectively limited.

Description

Intelligence extinguishing arc harmonic elimination overvoltage protection complex optimum device
Technical field
The utility model relates to a kind of intelligent extinguishing arc harmonic elimination overvoltage protection complex optimum device, belongs to the electric network protection equipment technical field.
Background technology
Along with the development of electrical network, overhead transmission line is progressively replaced by the cable line of solid insulation.Because the build-up effect that solid insulation punctures, its internal overvoltage, arc grounding overvoltage that particularly produces during electrical network generation single phase intermittent arc grounding and the ferro-resonance over-voltage that excites have therefrom become one of this type electric power netting safe running and have threatened greatly.Wherein serious with single-phase arc grounding overvoltage.
In system with non effectively earth ed neutral, generally be connected to electromagnetic potential transformer (hereinafter to be referred as PT).In order to measure three phase-to-ground voltages and to keep watch on insulation against ground, the neutral-point solid ground of PT.Because the load of PT low-pressure side is very little, approach Light Condition, see over the ground from the high-pressure side into equivalent excitation induction reactance very big; After some handover operation or earth fault disappearance; The equivalent excitation induction reactance of PT will with system over the ground equivalent capacity constitute special resonant tank, excited the ferro-resonance over-voltage of various harmonic waves, cause that PT is saturated; Hundreds of extremely saturated exciting currents of thousands of milliamperes because the PT fuse can not effectively fuse; Finally cause the PT scaling loss, PT cabinet, Explosion of on Arrester, accidents such as busbar short-circuit, impact electrical network, threat staff personal safety.Safe operation to electrical network has constituted very big threat, and has seriously influenced the reliability of power supply.In system with non effectively earth ed neutral, the PT ferro-resonance over-voltage be occur the most frequent, a lot of a kind of internal overvoltages causes the accident.
System to complicacy like this; The use that is difficult to isolate certain or a few kinds of overvoltage protections suppress various types of systems overvoltage comprehensively; And the overvoltage protection product that these different manufacturers are produced; Because of protective feature can not be mated each other, and can't thoroughly suppress system's overvoltage effectively.
The utility model content
According to above deficiency of the prior art; The technical problem that the utility model will solve is: a kind of above-mentioned defective that solved is provided; Can effectively mild superpotential rising front and scabble due to voltage spikes; Suppress ultralow frequency concussion electric current, eliminate the fuse phenomenon that frequently fuses, limited the superpotential intelligent extinguishing arc harmonic elimination overvoltage protection complex optimum device of arc grounding effectively.
The utility model solves the technical scheme that its technical problem adopted: described intelligent extinguishing arc harmonic elimination overvoltage protection complex optimum device; It is characterized in that: comprise cabinet; Be provided with isolating switch, PT harmonic elimination apparatus, the big comprehensive overvoltage protection device of capacity, single-phase vacuum contactor and high-voltage and current-limitation fuse in the cabinet; On the face door of cabinet intelligent controller is installed; Isolating switch is connected with high-voltage and current-limitation fuse with PT harmonic elimination apparatus, the big comprehensive overvoltage protection device of capacity respectively, and high-voltage and current-limitation fuse is connected with the single-phase vacuum contactor, and intelligent controller is connected with the single-phase vacuum contactor with the PT harmonic elimination apparatus respectively.
Described isolating switch is arranged on the cabinet middle part, and PT harmonic elimination apparatus integral body is arranged on rear lower in the cabinet, and the big comprehensive overvoltage protection device of capacity, single-phase vacuum contactor and high-voltage and current-limitation fuse are arranged on preceding bottom in the cabinet.
Described intelligent controller is the PIC single-chip microcomputer.Adopt PIC single-chip microcomputer advanced, that antijamming capability is extremely strong, as the supervising device of core processing unit.Adopted the remote centralized controlling Design, when monitoring extinguishing arc resonance eliminating wire-selection and overvoltage protection in real time, can be according to the voltage of bus is uploaded, with telemonitoring.Write down up-to-date 16 incident fault signature values; Record data are stored in the FLASH memory, and the device power down can be preserved more than 3 years.Be provided with the graphic lcd panel, can show various running statuses and data in real time, information is directly perceived in detail, and operation, debugging are conveniently.
The big comprehensive overvoltage protection device of capacity can effectively mild superpotential rising front and scabble due to voltage spikes, and can tolerate the super large energy of overvoltage generation, the dead band that can comprehensively eliminate system's overvoltage protection.
It is accurate that the PT harmonic elimination apparatus is measured residual voltage, imbalance of three-phase voltage and the residual voltage phenomenon that exceeds standard when eliminating main PT and adopting the intrinsic normal operation of angular aperture open circuit scheme.Effectively suppress ultralow frequency concussion electric current, eliminate the fuse phenomenon that frequently fuses.
In case single-phase arc grounding takes place in system, the single-phase vacuum contactor can move within 30ms, and the electric arc of fault point is extinguished immediately, has also limited the arc grounding overvoltage simultaneously effectively.
If when system's generation Single Phase Metal ground connection or single-phase arc grounding, this device action can make touch voltage and step voltage reduce greatly, more helps guaranteeing personal safety.
This device replaces the PT cabinet, has defencive functions such as overvoltage, low-voltage, decompression, and cost performance is high.
Cabinet is to wait high cube container, can supporting use with the high-voltage board at scene.
The utility model is applicable to the 3.6Kv-40.5kV electric power system of generating, power transformation and electricity consumption enterprise.And alternative voltage transformer cabinet, special-purpose lightning arrester cabinet etc.
The beneficial effect that the utility model had is: intelligent extinguishing arc harmonic elimination overvoltage protection complex optimum device is through having used the comprehensive overvoltage protection device of big capacity, PT harmonic elimination apparatus and single-phase vacuum contactor; Can effectively mild superpotential rising front and scabble due to voltage spikes; And can tolerate the super large energy that overvoltage produces, the dead band that can comprehensively eliminate system's overvoltage protection; The measurement residual voltage is accurate, and imbalance of three-phase voltage and the residual voltage phenomenon that exceeds standard has effectively suppressed ultralow frequency and shaken electric current when eliminating main PT and adopting the intrinsic normal operation of angular aperture open circuit scheme, has eliminated the fuse phenomenon that frequently fuses; In case single-phase arc grounding takes place in system, the single-phase vacuum contactor can move within 30ms, and the electric arc of fault point is extinguished immediately, has also limited the arc grounding overvoltage simultaneously effectively.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1, cabinet; 2, isolating switch; 3, PT harmonic elimination apparatus; 4, the big comprehensive overvoltage protection device of capacity; 5, single-phase vacuum contactor; 6, high-voltage and current-limitation fuse; 7, intelligent controller.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is done and to further describe:
As shown in Figure 1; Be provided with the comprehensive overvoltage protection device of isolating switch 2, PT harmonic elimination apparatus 3, big capacity 4, single-phase vacuum contactor 5 and high-voltage and current-limitation fuse 6 in the cabinet 1; On the face door of cabinet 1 intelligent controller 7 is installed; Isolating switch 2 is connected with high-voltage and current-limitation fuse 6 with PT harmonic elimination apparatus 3, the big comprehensive overvoltage protection device 4 of capacity respectively; High-voltage and current-limitation fuse 6 is connected with single-phase vacuum contactor 5, and intelligent controller 7 is connected with single-phase vacuum contactor 5 with PT harmonic elimination apparatus 3 respectively.
Isolating switch 2 is arranged on cabinet 1 middle part; PT harmonic elimination apparatus 3 integral body are arranged on rear lower in the cabinet 1; The comprehensive overvoltage protection device of big capacity 4, single-phase vacuum contactor 5 and high-voltage and current-limitation fuse 6 are arranged on preceding bottom in the cabinet 1, and intelligent controller 7 is the PIC single-chip microcomputer.
Isolating switch 2 inserts PT harmonic elimination apparatus 3, the big comprehensive overvoltage protection device 4 of capacity and high-voltage and current-limitation fuse 6 in the electric power system as the mains switch of this device.When in the system no matter the atmospheric over-voltage that produces when arc overvoltage that produces when being the circuit breaker switching overvoltage of cut-offfing generation, single-phase earthing or thunderbolt; Through the comprehensive overvoltage protection device 4 effective mild superpotential rising fronts of big capacity and scabble due to voltage spikes; And can tolerate the super large energy that overvoltage produces, thereby the dead band of comprehensively eliminating system's overvoltage protection.PT harmonic elimination apparatus 3 is under the situation of accomplishing the PT of system function; Through to its particular design (the D.C. resistance and induction reactance increasing of zero PT); It is more accurate to reach the measurement residual voltage, eliminates resonance and effectively suppresses the ultra-low frequency oscillation electric current, thereby protect PT that electrical network is normally moved.Single-phase vacuum contactor 5 inserts in the electric power system through high-voltage and current-limitation fuse 6, and single-phase vacuum contactor 5 is action executive components of this device.
Intelligent controller 7 is through gathering the secondary voltage of PT harmonic elimination apparatus 3, utilizes its computing and analysis ability at a high speed, to broken string, overvoltage, under-voltage, resonance, ground connection, and faults such as three-phase imbalance, judge and make following processing:
If intermittent arc grounding; Then intelligent controller 7 sends the order of closing a floodgate to single-phase vacuum contactor 5 between 20ms; Single-phase vacuum contactor 5 directly is connected fault with ground network within 10ms, converts arc grounding into metallic earthing fast within the 30ms.Show the separate and arc grounding signal of fault behind the device action on intelligent controller 7 panels, export passive switch amount contact point signal simultaneously.
If Single Phase Metal property ground connection, the metal ground signalling of demonstration fault is exported passive switch amount contact point signal simultaneously on intelligent controller 7 panels.
If broken string, overvoltage, under-voltage, resonance, three-phase imbalance fault show the failure classes signal on intelligent controller 7 panels, export passive switch amount contact point signal simultaneously.

Claims (3)

1. intelligent extinguishing arc harmonic elimination overvoltage protection complex optimum device; It is characterized in that: comprise cabinet (1); Be provided with isolating switch (2), PT harmonic elimination apparatus (3), the big comprehensive overvoltage protection device of capacity (4), single-phase vacuum contactor (5) and high-voltage and current-limitation fuse (6) in the cabinet (1); Intelligent controller (7) is installed on the face door of cabinet (1); Isolating switch (2) is connected with high-voltage and current-limitation fuse (6) with PT harmonic elimination apparatus (3), the big comprehensive overvoltage protection device of capacity (4) respectively; High-voltage and current-limitation fuse (6) is connected with single-phase vacuum contactor (5), and intelligent controller (7) is connected with single-phase vacuum contactor (5) with PT harmonic elimination apparatus (3) respectively.
2. intelligent extinguishing arc harmonic elimination overvoltage protection complex optimum device according to claim 1; It is characterized in that: described isolating switch (2) is arranged on cabinet (1) middle part; PT harmonic elimination apparatus (3) integral body is arranged on the interior rear lower of cabinet (1), and the big comprehensive overvoltage protection device of capacity (4), single-phase vacuum contactor (5) and high-voltage and current-limitation fuse (6) are arranged on preceding bottom in the cabinet (1).
3. intelligent extinguishing arc harmonic elimination overvoltage protection complex optimum device according to claim 1, it is characterized in that: described intelligent controller (7) is the PIC single-chip microcomputer.
CN2012202629387U 2012-06-06 2012-06-06 Intelligent comprehensive arc-extinction resonance-elimination overvoltage protection optimizing device Expired - Fee Related CN202616767U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012202629387U CN202616767U (en) 2012-06-06 2012-06-06 Intelligent comprehensive arc-extinction resonance-elimination overvoltage protection optimizing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012202629387U CN202616767U (en) 2012-06-06 2012-06-06 Intelligent comprehensive arc-extinction resonance-elimination overvoltage protection optimizing device

Publications (1)

Publication Number Publication Date
CN202616767U true CN202616767U (en) 2012-12-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102709899A (en) * 2012-06-06 2012-10-03 淄博联诚电力科技有限公司 Intelligent arc extinction and resonance extinction overvoltage protection integral optimization device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102709899A (en) * 2012-06-06 2012-10-03 淄博联诚电力科技有限公司 Intelligent arc extinction and resonance extinction overvoltage protection integral optimization device

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121219

Termination date: 20150606

EXPY Termination of patent right or utility model