CN201956666U

CN201956666U - High-voltage flexible safety device

Info

Publication number: CN201956666U
Application number: CN201120019141XU
Authority: CN
Inventors: 陈文根; 郭其君; 杨凌东
Original assignee: HEFEI HUILI ELECTRIC Technology Co Ltd
Current assignee: HEFEI HUILI ELECTRIC Technology Co Ltd
Priority date: 2011-01-21
Filing date: 2011-01-21
Publication date: 2011-08-31
Anticipated expiration: 2021-01-21

Abstract

The utility model discloses a high-voltage flexible safety device, which relates to the filed of power-operated equipment safety protection. The high-voltage flexible safety device comprises a microcomputer processor; the input terminal of the microcomputer processor is connected with a current transformer, a zero sequence current transformer and a voltage transformer; and the output terminal of the microcomputer processor is connected with a voltage transformer protection device, an arc grounding processor, a resonance processing device, a polyphase filtering processing device and an arc processing device. The high-voltage flexible safety device integrates arc extinction, harmonic elimination, and the monitoring of over voltage, harmonic wave, resonance and high-voltage insulation as well as a protection function, most faults of a neutral point non-effective grounding power grid can be automatically processed, and the range of power grid safe operation is greatly enlarged.

Description

A kind of high pressure Flexible Safety device

Technical field:

The utility model relates to operation power device security protection field, is specifically related to a kind of high pressure Flexible Safety device.

Background technology:

In the electric power system of a lot of industrial and mining enterprises, most of user's high and low pressure switchgear houses and outdoor on-the-spot thick line are cable substantially, and the high and low pressure circuit mixes, and than comparatively dense, running environment is more abominable.

Along with the development of present electrical network, it is a kind of inexorable trend that overhead transmission line is progressively replaced by the solid insulation circuit.Because the build-up effect that solid insulation punctures, its internal overvoltage, particularly arc grounding overvoltage that produces during electrical network generation single phase intermittent arc grounding and the ferro-resonance over-voltage that excites thus, and system resonance, harmonic wave, dielectric strength etc., become one of this class electric power netting safe running and threatened greatly, the automatic processing of insulating monitoring and fault has become requisite important topic and has conscientiously solved.

The utility model content:

Technical problem to be solved in the utility model be to provide a kind of collect extinguishing arc, harmonic elimination, and overvoltage, harmonic wave, resonance, High-Voltage Insulation monitoring and defencive function be the high pressure Flexible Safety device of one.

Technical problem to be solved in the utility model realizes by the following technical solutions,

A kind of high pressure Flexible Safety device, it is characterized in that: described high pressure Flexible Safety device includes computer processor, the input of computer processor is connected with current transformer, zero sequence current mutual inductor, voltage transformer, and the output of computer processor is connected with voltage transformer protective device, arc grounding processor, resonance processing unit, multinomial filter processing device, arc light processing unit; Described high pressure Flexible Safety device comprises that also overvoltage suppresses circuit, mutual induction of voltage circuit, arc light treatment circuit; described overvoltage suppresses circuit by excess voltage suppressor ground connection; ground connection after described mutual induction of voltage circuit is connected with described voltage transformer protective device by described voltage transformer; ground connection after described arc light treatment circuit is connected with described arc grounding processor by described arc light processor connects isolation switch after described voltage-suppressing circuit, mutual induction of voltage circuit, the parallel connection of arc light treatment circuit.

Described mutual induction of voltage circuit has been arranged in parallel two groups, and system adopts two voltage transformer samplings and the protection of voltage transformer multilayer.

Described computer processor adopts two DSP32 bit machines, calculates, analysis speed is fast.

The beneficial effects of the utility model are collection extinguishing arc, harmonic elimination, and to suppress overvoltage, harmonic wave, resonance, High-Voltage Insulation monitoring and defencive function be one; most of fault of neutral non-effective grounding electrical network is handled automatically, and has improved the scope of electric power netting safe running greatly.

Description of drawings:

Fig. 1 is a principle schematic of the present utility model.

Fig. 2 is a system schematic of the present utility model.

Embodiment:

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with specific embodiment and diagram, further set forth the utility model.

As shown in Figure 1 and Figure 2, a kind of high pressure Flexible Safety device, include computer processor 10, the input of computer processor 10 is connected with current transformer 1, zero sequence current mutual inductor 2, voltage transformer 6, and the output of computer processor 10 is connected with voltage transformer protective device 7, arc grounding processor 8, resonance processing unit 11, multinomial filter processing device 12, arc light processing unit 9; High pressure Flexible Safety device comprises that also overvoltage suppresses circuit, mutual induction of voltage circuit, arc light treatment circuit; overvoltage suppresses circuit by excess voltage suppressor 5 ground connection; ground connection after the mutual induction of voltage circuit is connected with voltage transformer protective device 7 by voltage transformer 6; ground connection after the arc light treatment circuit is connected with arc grounding processor 8 by arc light processor 9 connects isolation switch 3 after voltage-suppressing circuit, mutual induction of voltage circuit, the parallel connection of arc light treatment circuit.

The mutual induction of voltage circuit has been arranged in parallel two groups, and system adopts two voltage transformer 6 samplings and the protection of voltage transformer 6 multilayers.Computer processor 10 adopts the DSP32 bit machines, calculates, analysis speed is fast.

When the overvoltage of high amplitude appearred in system, overvoltage suppresses circuit at first devoted oneself to work, with system's overvoltage Limiting in the safe range that insulation of electrical installation allows; When ground connection or resonance fault take place in protected system; the instantaneous value of the three-phase voltage U a that computer processor 10 provides according to voltage transformer 6, Ub, Uc and open delta voltage U; the variate-value that summation current transformer 1 provides; and zero-sequence current 2 provide changing value judge the character of fault, send corresponding instruction and signal.

1. if the fault of Fa Shenging is a unstable arc ground connection, computer processor 10 sends instruction after judging ground connection separate, makes in the vacuum contactor 10ms of fault phase closed; With arc grounding processor 8 restriction and adjustment module inputs, the restriction of arc light electric current is discharged, limited the fault of fault phase.

2. if the fault of Fa Shenging is a stable arc ground connection, computer processor 10 is after judging that fault is separate, make fault phase and high-pressure vacuum contactor work, make system in 30ms, be quickly converted to the direct ground connection of stable metallicity by the arc grounding of stability, make the fault phase voltage reduce to zero, electric arc disappears.Illustrate that this arcing ground fault is that computer processor 10 route selections are handled because the instantaneity earth fault that voltge surge causes is installed and assert that this fault is nonvolatil arcing ground fault.

3. if the fault of Fa Shenging is in the protection range of this device (this device hypomere user); this device is handled immediately; if metallic direct earth fault takes place in the epimere user; this device can send early warning signal and indication according to the nature of trouble differentiation; the user can be according to the fault section situation, in time reflects and handles.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. high pressure Flexible Safety device, it is characterized in that: described high pressure Flexible Safety device includes computer processor, the input of computer processor is connected with current transformer, zero sequence current mutual inductor, voltage transformer, and the output of computer processor is connected with voltage transformer protective device, arc grounding processor, resonance processing unit, multinomial filter processing device, arc light processing unit;

Described high pressure Flexible Safety device comprises that also overvoltage suppresses circuit, mutual induction of voltage circuit, arc light treatment circuit; described overvoltage suppresses circuit by excess voltage suppressor ground connection; ground connection after described mutual induction of voltage circuit is connected with described voltage transformer protective device by described voltage transformer; ground connection after described arc light treatment circuit is connected with described arc grounding processor by described arc light processor connects isolation switch after described voltage-suppressing circuit, mutual induction of voltage circuit, the parallel connection of arc light treatment circuit.

2. a kind of high pressure Flexible Safety device according to claim 1, it is characterized in that: described mutual induction of voltage circuit has been arranged in parallel two groups.

3. a kind of high pressure Flexible Safety device according to claim 1 is characterized in that: described computer processor adopts the input and output interface of two DSP32 bit machines.