CN105098751A - System overvoltage inhibition device - Google Patents
System overvoltage inhibition device Download PDFInfo
- Publication number
- CN105098751A CN105098751A CN201410667014.9A CN201410667014A CN105098751A CN 105098751 A CN105098751 A CN 105098751A CN 201410667014 A CN201410667014 A CN 201410667014A CN 105098751 A CN105098751 A CN 105098751A
- Authority
- CN
- China
- Prior art keywords
- voltage
- overvoltage
- fuse
- voltage transformer
- intelligent
- 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.)
- Pending
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a system overvoltage inhibition device and relates to the technical field of electric power system overvoltage absorption. The system overvoltage inhibition device comprises a high-voltage current limiting fuse, a voltage transformer, a high-energy-capacity overvoltage absorber, a high-voltage fuse, an intelligent resonance elimination switch and a microcomputer integration protection apparatus. One end of the high-voltage current limiting fuse and one end of a rapid fuse are respectively connected with a high-voltage isolation switch. The other end of the high-voltage current limiting fuse is connected with one end of the high-energy-capacity overvoltage absorber. The other end of the high-energy-capacity overvoltage absorber is grounded. The other end of the rapid fuse is connected with the voltage transformer. The voltage transformer is further connected with the intelligent resonance elimination switch and the microcomputer integration protection apparatus. The microcomputer integration protection apparatus is further connected with the intelligent resonance elimination switch. The intelligent resonance elimination switch is further grounded. The system overvoltage inhibition device provided by the invention is capable of replacing a voltage transformer cabinet; the detection, metering and protection capabilities and the protected capability of the voltage transformer cabinet is improved; in addition, a system peak overvoltage is inhibited, the residual voltage value is low, and accurate and rapid resonance elimination is realized.
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 enterprises of China 6 ~ 35KV adopts the operational mode of isolated neutral mostly.Run in electric power system, more serious problem is short trouble, earth fault and resonance fault, by circuit device, faulty line is excised for short trouble, as long as reasonable in design, select suitable circuit breaker, short trouble scope would not expand, but also to note the problem of switching overvoltage simultaneously, installing system overvoltage restraining device or Large Copacity overvoltage protection device can better not impacted by proterctive equipment, extension device useful life, earth fault and resonance fault, relatively simple for dealing with electric power system, if but method is improper, if do not have suitable system overvoltage protective device to suppress, fault also can develop expansion and cause serious consequence, such as overvoltage energy impact causes voltage transformer saturated, there is ferro resonance and cause voltage transformer explosion damage, overvoltage and energy thereof cause the apparatus insulated consequence that to suffer damage etc.
For neutral point non-direct grounding system, the existing electric power regulations stipulate of China allows band single phase ground fault to run 2 hours, refer to metallic earthing here, if arc grounding then can cause serious harm, single phase ground fault is the arc overvoltage that arc grounding can produce that peak reaches more than 3.5 times phase voltages in systems in which, if overvoltage a few hours high like this act on electrical network, the accumulation damage of insulation in electric equipment will certainly be caused, if cause insulation to puncture over the ground in the insulation weak link of full phase, the major accident of phase fault will be caused into.
Summary of the invention
The object of this invention is to provide a kind of high energy and hold the system voltage restraining device absorbing overvoltage, Intelligent resonance suppression, can be the joint line of main electrical network, cable line and overhead system in order to cable line, and can area voltage transformer cabinet and Special lightning arrester cabinet.
In order to solve problem existing in background technology, the present invention is by the following technical solutions: it comprises high-voltage and current-limitation fuse FU, voltage transformer pt, high energy appearance 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, fast acting fuse RD one end connect high voltage isolator respectively; another termination high energy of high-voltage and current-limitation fuse FU holds overvoltage protection device DB one end; high energy holds overvoltage protection device DB other end ground connection; another termination voltage transformer pt of fast acting fuse RD; voltage transformer pt is meeting Intelligent resonance suppression switch ZK, computer integrated protection LKY respectively; computer integrated protection LKY is Intelligent resonance suppression switch ZK, Intelligent resonance suppression switch ZK ground connection again.
The present invention can not only suppress the peak overvoltage of system, and residual voltage value is low, well can eliminate the protection's dead-zone of system overvoltage.Add that its superpower marking can be held, can the large energy that produces when occurring of effective clamping system overvoltage absorption system overvoltage, there is the effect of good cumulative, energy-absorbing, effectively can suppress atmospheric over-voltage, make voltage and the larger arc grounding over-voltage of amplitude and magnet resonance overvoltage.
In the Intelligent resonance suppression device of an earth point, have employed outstanding recovering technology instantaneously, after fundamentally solving system single-phase earth fault elimination, when three-phase voltage restores balance, shoving of system direct-to-ground capacitance can impact PT, PT may be caused to fuse and even to damage the problem of PT, effective protection has also been carried out to magnet resonance overvoltage, on microcomputer harmonic elimination voltage transformer comprehensive protector, microcomputer DSP technology is adopted to realize electric network deharmonic, utilize it quick, data-handling capacity realizes Fourier analysis accurately, by the collection to PT three-phase voltage and open delta voltage, all frequency contents of electrical network resonance are carried out fast.Analyze accurately, discern the harmonic frequency of resonance exactly, and allow computer send different instructions according to different frequencies, different harmonic elimination circuit is dropped into rapidly, realizes quick harmonic elimination, prove through actual motion; This device, to the equal accuracy of judgement of continuous 0 ~ 300Hz resonance, is swift in motion, solves the resonance problems of electrical network in electric power system comparatively perfectly.
Microcomputer harmonic elimination voltage transformer comprehensive protector constantly detects the voltage signal of PT in real time; there is the faults such as PT broken string, overvoltage, low-voltage, decompression, resonance once system; according to the voltage signal that PT provides; utilize the disposal ability fast and accurately of DSP technology; Real-time Collection is carried out to voltage waveform, and accurately judges the failure condition of system, display fault category; send alarm signal, corresponding switching value contact point signal of publishing books.
System overvoltage restraining device of the present invention; it can substitute voltage transformer cabinet, and the perfect detection of voltage transformer cabinet, metering and protective capability and protected ability, system peak overvoltage can not only be suppressed; and residual voltage value is low, can harmonic elimination accurately and rapidly.
Accompanying drawing explanation
Fig. 1 is electrical schematic diagram of the present invention.
Embodiment
See Fig. 1, a kind of system overvoltage restraining device, it comprises high-voltage and current-limitation fuse FU, voltage transformer pt, high energy appearance 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, fast acting fuse RD one end connect high voltage isolator respectively; another termination high energy of high-voltage and current-limitation fuse FU holds overvoltage protection device DB one end; high energy holds overvoltage protection device DB other end ground connection; another termination voltage transformer pt of fast acting fuse RD; voltage transformer pt is meeting Intelligent resonance suppression switch ZK, computer integrated protection LKY respectively; computer integrated protection LKY is Intelligent resonance suppression switch ZK, Intelligent resonance suppression switch ZK ground connection again.
The present invention can not only suppress the peak overvoltage of system, and residual voltage value is low, well can eliminate the protection's dead-zone of system overvoltage.Add that its superpower marking can be held, can the large energy that produces when occurring of effective clamping system overvoltage absorption system overvoltage, there is the effect of good cumulative, energy-absorbing, effectively can suppress atmospheric over-voltage, make voltage and the larger arc grounding over-voltage of amplitude and magnet resonance overvoltage.
In the Intelligent resonance suppression device of an earth point, have employed outstanding recovering technology instantaneously, after fundamentally solving system single-phase earth fault elimination, when three-phase voltage restores balance, shoving of system direct-to-ground capacitance can impact PT, PT may be caused to fuse and even to damage the problem of PT, effective protection has also been carried out to magnet resonance overvoltage, on microcomputer harmonic elimination voltage transformer comprehensive protector, microcomputer DSP technology is adopted to realize electric network deharmonic, utilize it quick, data-handling capacity realizes Fourier analysis accurately, by the collection to PT three-phase voltage and open delta voltage, all frequency contents of electrical network resonance are carried out fast.Analyze accurately, discern the harmonic frequency of resonance exactly, and allow computer send different instructions according to different frequencies, different harmonic elimination circuit is dropped into rapidly, realizes quick harmonic elimination, prove through actual motion; This device, to the equal accuracy of judgement of continuous 0 ~ 300Hz resonance, is swift in motion, solves the resonance problems of electrical network in electric power system comparatively perfectly.
Microcomputer harmonic elimination voltage transformer comprehensive protector constantly detects the voltage signal of PT in real time; there is the faults such as PT broken string, overvoltage, low-voltage, decompression, resonance once system; according to the voltage signal that PT provides; utilize the disposal ability fast and accurately of DSP technology; Real-time Collection is carried out to voltage waveform, and accurately judges the failure condition of system, display fault category; send alarm signal, corresponding switching value contact point signal of publishing books.
System overvoltage restraining device of the present invention; it can substitute voltage transformer cabinet, and the perfect detection of voltage transformer cabinet, metering and protective capability and protected ability, system peak overvoltage can not only be suppressed; and residual voltage value is low, can harmonic elimination accurately and rapidly.
Claims (1)
1. system overvoltage restraining device, it is characterized in that, it comprises high-voltage and current-limitation fuse (FU), voltage transformer (PT), high energy appearance 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, fast acting fuse (RD) one end connects high voltage isolator respectively, another termination high energy of high-voltage and current-limitation fuse (FU) holds overvoltage protection device (DB) one end, high energy holds overvoltage protection device (DB) other end ground connection, another termination voltage transformer (PT) of fast acting fuse (RD), voltage transformer (PT) is connecing Intelligent resonance suppression switch (ZK) respectively, computer integrated protection (LKY), computer integrated protection (LKY) is Intelligent resonance suppression switch (ZK), Intelligent resonance suppression switch (ZK) ground connection again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410667014.9A CN105098751A (en) | 2014-11-20 | 2014-11-20 | System overvoltage inhibition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410667014.9A CN105098751A (en) | 2014-11-20 | 2014-11-20 | System overvoltage inhibition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105098751A true CN105098751A (en) | 2015-11-25 |
Family
ID=54578623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410667014.9A Pending CN105098751A (en) | 2014-11-20 | 2014-11-20 | System overvoltage inhibition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105098751A (en) |
Citations (3)
| 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 |
| CN203180508U (en) * | 2013-01-22 | 2013-09-04 | 合肥隆科电力设备有限责任公司 | System overvoltage inhibition apparatus |
| CN104065054A (en) * | 2014-05-30 | 2014-09-24 | 安徽金捷光电科技有限公司 | Overvoltage inhibition cabinet |
-
2014
- 2014-11-20 CN CN201410667014.9A patent/CN105098751A/en active Pending
Patent Citations (3)
| 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 |
| CN203180508U (en) * | 2013-01-22 | 2013-09-04 | 合肥隆科电力设备有限责任公司 | System overvoltage inhibition apparatus |
| CN104065054A (en) * | 2014-05-30 | 2014-09-24 | 安徽金捷光电科技有限公司 | Overvoltage inhibition cabinet |
Non-Patent Citations (1)
| Title |
|---|
| 沈小萍: "消弧及过电压保护装置在高压厂用电系统中的应用", 《电气应用》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103324788A (en) | Lightning stroke characteristic assessment method | |
| CN105356441A (en) | Intelligent PT harmonic elimination and phase selection method and device | |
| CN203180508U (en) | System overvoltage inhibition apparatus | |
| CN104953578A (en) | System overvoltage suppression device | |
| CN104158163B (en) | VFTO protection device and method for transformer in GIS substation | |
| CN105356436B (en) | Multifunctional comprehensive circuit protection device | |
| CN205355804U (en) | Overvoltage suppressing device | |
| CN201774233U (en) | Novel protection device special for low voltage generator | |
| CN205646795U (en) | Intelligence PT cabinet | |
| CN105098751A (en) | System overvoltage inhibition device | |
| CN104868460A (en) | System overvoltage inhibition apparatus | |
| CN202696141U (en) | Arc-extinction resonance-elimination device | |
| CN106058834A (en) | System over-voltage suppression device | |
| CN201388042Y (en) | Central high-voltage switch equal-height cabinet | |
| CN106099889A (en) | System overvoltage restraining device | |
| CN105977942A (en) | System over-voltage suppression device | |
| CN105958462A (en) | System overvoltage suppression device | |
| CN202678961U (en) | High-capacity over-voltage absorption device | |
| CN204030580U (en) | A kind of overvoltage inhibiting apparatus with small current line selection | |
| Chi et al. | Comparison and analysis on Very Fast Transient Overvoltage based on 550kV GIS and 800kV GIS | |
| CN201387999Y (en) | Central high-low cabinet type intelligent arc extinction, harmonic elimination and route selection device | |
| CN204012702U (en) | A kind of arc-extinguishing harmonic-eliminating cabinet with virtual ground device | |
| Zhuo et al. | Research of suppressing VFTO for 500kV GIS substation based on EMTP/ATP | |
| CN203859512U (en) | PT arc-extinguishing protective device | |
| CN202872357U (en) | Optimized comprehensive protection device of power grid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151125 |