CN105977942A - System over-voltage suppression device - Google Patents
System over-voltage suppression device Download PDFInfo
- Publication number
- CN105977942A CN105977942A CN201610470037.XA CN201610470037A CN105977942A CN 105977942 A CN105977942 A CN 105977942A CN 201610470037 A CN201610470037 A CN 201610470037A CN 105977942 A CN105977942 A CN 105977942A
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- CN
- China
- Prior art keywords
- voltage
- fuse
- over
- voltage transformer
- overvoltage
- Prior art date
- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a system over-voltage suppression device, relating to the technical field of over-voltage absorption of power systems. The system over-voltage suppression device comprises a high-voltage current limiting fuse, a voltage transformer, a high-energy-capacity over-voltage absorber, a high-voltage fuse, an intelligent resonance elimination switch and a micro-computer integrated protection device; one end of the high-voltage current limiting fuse and one end of a quick fuse are respectively connected to a high-voltage isolation switch; the other end of the high-voltage current limiting fuse is connected to one end of a high-energy-capacity over-voltage protector; the other end of the high-energy-capacity over-voltage protector is grounded; the other end of the quick fuse is connected to the voltage transformer; the voltage transformer is respectively connected to the intelligent resonance elimination switch and the micro-computer integrated protection device; the micro-computer integrated protection device is connected with the intelligent resonance elimination switch; and the intelligent resonance elimination switch is grounded. A voltage transformer cabinet can be replaced by the system over-voltage suppression device disclosed by the invention; the detecting, metering and protecting capabilities and the protected capability of the voltage transformer cabinet are perfect; the peak over-voltage of the system can be inhibited; furthermore, the residual voltage value is low; and resonance can be eliminated accurately and rapidly.
Description
Technical field
The present invention relates to Hyper-Voltage of Power Systems absorption techniques field.
Background technology
For a long time, the electrical network of industrial and mining establishment of China 6 ~ 35KV uses the method for operation of isolated neutral mostly.At electricity
Force system runs, is short trouble, earth fault and resonance fault than more serious problem, for short trouble by circuit device
Excise faulty line, as long as reasonable in design, select suitable chopper, short trouble scope to expand, but simultaneously
It is also noted that the problem of switching overvoltage, installing system overvoltage restraining device or Large Copacity overvoltage protection device can be preferably
Protection equipment is not impacted, extension device service life, and earth fault and resonance fault process for power system
Come relatively simple, but if method is the most proper, suppress without suitable system overvoltage protection device, therefore
Barrier also can develop expansion and cause serious consequence, and such as overvoltage energy impact causes voltage transformer saturated, and ferromagnetic resonance occurs
Causing voltage transformer explosion damage, overvoltage and energy thereof cause the apparatus insulated consequence that suffers damage etc..
For neutral point non-direct grounding system, China's existing electric power code regulation allows band singlephase earth fault to run 2
Hour, refer herein to metallic earthing, if arc grounding then can cause serious harm, singlephase earth fault is arc
Light ground connection can produce peak in systems and reach the arc overvoltage of more than 3.5 times phase voltages, if the highest overvoltage number
Hour act on electrical network, the accumulation damage of insulation in electrical equipment will certainly be caused, if in the insulation weak link of full phase
Insulation is caused to puncture over the ground, it will to cause into the major accident of phase fault.
Summary of the invention
It is an object of the invention to provide a kind of high energy and hold absorption overvoltage, the system voltage restraining device of Intelligent resonance suppression, can
In order to the joint line that cable run is main electrical network, cable run and overhead system, and can area voltage transformer cabinet and specially
Use spark gap cabinet.
In order to solve the problem in the presence of background technology, the present invention is by the following technical solutions: it includes high pressure limit
Flow fuse FU, voltage transformer pt, high energy hold surge absorber DB, high-tension fuse RD, Intelligent resonance suppression switch ZK, microcomputer
Comprehensive protector LKY；
Described high-voltage and current-limitation fuse FU one end, fastp-acting fuse RD one end connect high voltage isolator respectively, and high-voltage and current-limitation melts
Another termination high energy of disconnected device FU holds overvoltage protection device DB one end, and high energy holds overvoltage protection device DB other end ground connection, fast fast thawing
Another termination voltage transformer pt of disconnected device RD, voltage transformer pt is connecing Intelligent resonance suppression switch ZK, computer integrated protection dress respectively
Put LKY, computer integrated protection LKY and be that Intelligent resonance suppression switchs ZK, Intelligent resonance suppression switch ZK ground connection again.
The present invention can not only the peak overvoltage of suppression system, and residual voltage value is low, can well eliminate system the most electric
The protection's dead-zone of pressure.Can hold plus its superpower marking, when the effective clamping system overvoltage of energy absorption system overvoltage occur
Produced big energy, has the effect of good cumulative, energy-absorbing, can effectively suppress atmospheric over-voltage, make voltage
And the bigger arc grounding over-voltage of amplitude and Magnet resonance overvoltage.
In the Intelligent resonance suppression device of an earth point, have employed moment hangs recovering technology, fundamentally solves system list
After phase earth fault eliminates, when three-phase voltage restores balance, PT can be impacted by shoving of system direct-to-ground capacitance, may
Cause PT fusing even to damage the problem of PT, Magnet resonance overvoltage is also carried out effective protection, at microcomputer harmonic elimination
On voltage transformer comprehensive protector, use microcomputer DSP technology to realize electric network deharmonic, utilize it fast and accurately at data
Reason ability realizes Fourier analysis, by the collection to PT three-phase voltage and open delta voltage, and all to electrical network resonance
Frequency content is carried out quickly.Analyze accurately, discern the harmonic frequency of resonance exactly, and allow computer according to different frequencies
Send different instructions, make different harmonic elimination circuit put into rapidly, it is achieved quickly harmonic elimination, prove through actual motion；This device pair
The continuous equal accuracy of judgement of 0 ~ 300Hz resonance, is swift in motion, and well solves the resonance problems of electrical network in power system.
Microcomputer harmonic elimination voltage transformer comprehensive protector the most constantly detects the voltage signal of PT, and once system occurs
During the faults such as PT broken string, overvoltage, low-voltage, decompression, resonance, the voltage signal provided according to PT, utilize the fast of DSP technology
Speed, disposal ability accurately, carry out Real-time Collection to voltage waveform, and is accurately judged to the failure condition of system, shows fault
Classification, sends alarm signal, corresponding switching value contact point signal of publishing books.
The system overvoltage restraining device of the present invention, it can substitute voltage transformer cabinet, and perfect voltage transformer
The detection of cabinet, metering and protective capability and by protective capability, can not only suppression system peak overvoltage, and residual voltage value is low,
Can harmonic elimination accurately and rapidly.
Accompanying drawing explanation
Fig. 1 is the electrical schematic diagram of the present invention.
Detailed description of the invention
Seeing Fig. 1, a kind of system overvoltage restraining device, it includes high-voltage and current-limitation fuse FU, voltage transformer pt, height
Surge absorber DB, high-tension fuse RD, Intelligent resonance suppression switch ZK, computer integrated protection LKY can be held；
Described high-voltage and current-limitation fuse FU one end, fastp-acting fuse RD one end connect high voltage isolator respectively, and high-voltage and current-limitation melts
Another termination high energy of disconnected device FU holds overvoltage protection device DB one end, and high energy holds overvoltage protection device DB other end ground connection, fast fast thawing
Another termination voltage transformer pt of disconnected device RD, voltage transformer pt is connecing Intelligent resonance suppression switch ZK, computer integrated protection dress respectively
Put LKY, computer integrated protection LKY and be that Intelligent resonance suppression switchs ZK, Intelligent resonance suppression switch ZK ground connection again.
The present invention can not only the peak overvoltage of suppression system, and residual voltage value is low, can well eliminate system the most electric
The protection's dead-zone of pressure.Can hold plus its superpower marking, when the effective clamping system overvoltage of energy absorption system overvoltage occur
Produced big energy, has the effect of good cumulative, energy-absorbing, can effectively suppress atmospheric over-voltage, make voltage
And the bigger arc grounding over-voltage of amplitude and Magnet resonance overvoltage.
In the Intelligent resonance suppression device of an earth point, have employed moment hangs recovering technology, fundamentally solves system list
After phase earth fault eliminates, when three-phase voltage restores balance, PT can be impacted by shoving of system direct-to-ground capacitance, may
Cause PT fusing even to damage the problem of PT, Magnet resonance overvoltage is also carried out effective protection, at microcomputer harmonic elimination
On voltage transformer comprehensive protector, use microcomputer DSP technology to realize electric network deharmonic, utilize it fast and accurately at data
Reason ability realizes Fourier analysis, by the collection to PT three-phase voltage and open delta voltage, and all to electrical network resonance
Frequency content is carried out quickly.Analyze accurately, discern the harmonic frequency of resonance exactly, and allow computer according to different frequencies
Send different instructions, make different harmonic elimination circuit put into rapidly, it is achieved quickly harmonic elimination, prove through actual motion；This device pair
The continuous equal accuracy of judgement of 0 ~ 300Hz resonance, is swift in motion, and well solves the resonance problems of electrical network in power system.
Microcomputer harmonic elimination voltage transformer comprehensive protector the most constantly detects the voltage signal of PT, and once system occurs
During the faults such as PT broken string, overvoltage, low-voltage, decompression, resonance, the voltage signal provided according to PT, utilize the fast of DSP technology
Speed, disposal ability accurately, carry out Real-time Collection to voltage waveform, and is accurately judged to the failure condition of system, shows fault
Classification, sends alarm signal, corresponding switching value contact point signal of publishing books.
The system overvoltage restraining device of the present invention, it can substitute voltage transformer cabinet, and perfect voltage transformer
The detection of cabinet, metering and protective capability and by protective capability, can not only suppression system peak overvoltage, and residual voltage value is low,
Can harmonic elimination accurately and rapidly.
Claims (1)
1. system overvoltage restraining device, it is characterised in that it include high-voltage and current-limitation fuse (FU), voltage transformer (PT),
High energy holds surge absorber (DB), high-tension fuse (RD), Intelligent resonance suppression switch (ZK), computer integrated protection (LKY)；
Described high-voltage and current-limitation fuse (FU) one end, fastp-acting fuse (RD) one end connect high voltage isolator respectively, and high-voltage and current-limitation melts
Another termination high energy of disconnected device (FU) holds overvoltage protection device (DB) one end, and high energy holds overvoltage protection device (DB) other end ground connection,
Fastp-acting fuse (RD) another termination voltage transformer (PT), voltage transformer (PT) connect respectively Intelligent resonance suppression switch (ZK),
Computer integrated protection (LKY), computer integrated protection (LKY) is that Intelligent resonance suppression switchs (ZK), and Intelligent resonance suppression switchs
(ZK) ground connection again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610470037.XA CN105977942A (en) | 2016-06-26 | 2016-06-26 | System over-voltage suppression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610470037.XA CN105977942A (en) | 2016-06-26 | 2016-06-26 | System over-voltage suppression device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105977942A true CN105977942A (en) | 2016-09-28 |
Family
ID=57019617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610470037.XA Withdrawn CN105977942A (en) | 2016-06-26 | 2016-06-26 | System over-voltage suppression device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105977942A (en) |
-
2016
- 2016-06-26 CN CN201610470037.XA patent/CN105977942A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160928 |