CN203135431U - Overvoltage suppression cabinet - Google Patents
Overvoltage suppression cabinet Download PDFInfo
- Publication number
- CN203135431U CN203135431U CN 201320133862 CN201320133862U CN203135431U CN 203135431 U CN203135431 U CN 203135431U CN 201320133862 CN201320133862 CN 201320133862 CN 201320133862 U CN201320133862 U CN 201320133862U CN 203135431 U CN203135431 U CN 203135431U
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- Prior art keywords
- overvoltage
- cabinet
- voltage
- suppresses
- intelligent switch
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Abstract
The utility model provides an overvoltage suppression cabinet comprising a cabinet body which is internally provided with a high-voltage isolating switch, a measuring and controlling device, a voltage transformer, an overvoltage absorber, an intelligent switch and a primary harmonic elimination device. The lower end of the voltage transformer is respectively connected with the primary harmonic elimination device and the intelligent switch. The lower end of the intelligent switch is grounded. The lower end of the primary harmonic elimination device is grounded. The lower end of the overvoltage absorber is grounded. The measuring and controlling device is respectively connected with the voltage transformer, the primary harmonic elimination device and the intelligent switch. The overvoltage suppression cabinet can correctly determine continuous 0 to 300Hz resonance, the action is quick, a resonance problem of a power grid in a power system is solved well, a system overvoltage protection element and a device protection dead zone can be eliminated, the protection characteristics of system overvoltage are optimized, a rising edge of the overvoltage can be effectively smoothed and suppression and filtering are carried out until a voltage peak is smoothed, and the overvoltage suppression cabinet can withstand large energy generated by the overvoltage.
Description
Technical field
The utility model relates to a kind of voltage protection, is specifically related to a kind of overvoltage and suppresses cabinet.
Background technology
There is multiple overvoltage in China 3-35Kv system: the arc overvoltage that produces when the atmospheric over-voltage that produces when the resonance overvoltage that the switching overvoltage that produces in the circuit breaker course of action, capacity cell and nonlinear inductance produce, thunderbolt and single-phase earthing etc. under certain condition.
System at complexity like this; the use that is difficult to isolate certain or certain several overvoltage protection suppress various types of systems overvoltage comprehensively; and the overvoltage protection product that these different manufacturers are produced; because protective feature can not be mated mutually, and can't thoroughly suppress system's overvoltage effectively.
The utility model content
At above-mentioned deficiency, the purpose of this utility model provides a kind of overvoltage and suppresses cabinet, can the various overvoltage that occur in the electrical network be limited, and improves fail safe and the power supply reliability of operation of power networks.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of overvoltage suppresses cabinet, it comprises cabinet, be provided with high voltage isolator in the described cabinet, measure and control device, voltage transformer, surge absorber, intelligent switch and a resonance eliminator, the last termination bus of described high voltage isolator, its lower end connects voltage transformer and surge absorber respectively, the lower end of described voltage transformer connects resonance eliminator and intelligent switch respectively, the lower end ground connection of described intelligent switch, the lower end ground connection of a described resonance eliminator, the lower end ground connection of described surge absorber, described measure and control device respectively with voltage transformer, one time resonance eliminator is connected with intelligent switch.
Described high voltage isolator lower end is connected with high-tension fuse.
Described high-tension fuse comprises first high-tension fuse of connecting with the voltage transformer upper end and the high-voltage and current-limitation fuse of connecting with the surge absorber upper end.
Described measure and control device is provided with RS485 or the external communication interface of CAN.
Described voltage suppresses cabinet and is provided with electrification display, and described electrification display is connected with high voltage isolator.
Series capacitance between described electrification display and the high voltage isolator.
Described surge absorber adopts big capacitance oxidization zinc valve block.
The beneficial effects of the utility model are; to the equal accuracy of judgement of continuous 0～300hz resonance; be swift in motion; solved the resonance problems of electrical network in the electric power system perfectly; can eliminate system's overvoltage protection element and unit protection dead band; the superpotential protective feature of optimization system, and can effectively mild superpotential rising front and suppress to filter until scabbling due to voltage spikes, and can tolerate the super large energy that overvoltage produces.
Description of drawings
Fig. 1 is electrical schematic diagram of the present utility model.
Among the figure, 1, measure and control device, 2, surge absorber, 3, intelligent switch, 4, resonance eliminators, 5, voltage transformer, 6, first high-tension fuse, 7, high voltage isolator, 8, high-voltage and current-limitation fuse, 9, electric capacity, 10, electrification display.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
Referring to Fig. 1, the utility model comprises cabinet, be provided with high voltage isolator 7 in the described cabinet, measure and control device 1, voltage transformer 5, surge absorber 2, intelligent switch 3 and a resonance eliminator 4, the last termination bus of described high voltage isolator 7, its lower end connects voltage transformer 5 and surge absorber 2 respectively, the lower end of described voltage transformer 5 connects resonance eliminator 4 and intelligent switch 3 respectively, the lower end ground connection of described intelligent switch 3, the lower end ground connection of a described resonance eliminator 4, the lower end ground connection of described surge absorber 2, described measure and control device 1 respectively with voltage transformer 5, one time resonance eliminator 4 is connected with intelligent switch 3.
One time resonance eliminator 4 can effectively suppress system's overvoltage to the damage of voltage transformer 5.
Described high voltage isolator 7 lower ends are connected with high-tension fuse.
Described high-tension fuse comprises first high-tension fuse 6 of connecting with voltage transformer 5 upper ends and the high-voltage and current-limitation fuse 8 of connecting with surge absorber 2 upper ends.It is as the backup protection device of whole device, have the capacity of cut-offfing big, cut-off rapidly, current limitation effect is good, cut-off specific functions such as arc voltage is low, guarantees to meet backup protection reliability of the present utility model.
Described measure and control device 1 adopts two CPU designs, and host CPU adopts 32 bit DSPs, and product is applied to electric network deharmonic with microcomputer technology, utilizes computer data-handling capacity realization fast and accurately Fourier analysis, and its frequency-selecting is accurate.By the collection to voltage transformer 5 three-phase voltages and open delta voltage, all frequency content during to electrical network resonance can rapid analysis, discern single-phase earthing, electrical network resonance exactly; If resonance, according to different frequency, measure and control device 1 sends different instructions drops into a different resonance eliminator 4, realize quick harmonic elimination, prove that through actual motion this device is to the equal accuracy of judgement of continuous 0～300hz resonance, be swift in motion, solved the resonance problems of electrical network in the electric power system perfectly.Measure and control device 1 is provided with memory simultaneously, and the instantaneous various technical parameters of energy stored record resonance condition are convenient to accident analysis.
Described measure and control device 1 is provided with RS485 or the external communication interface of CAN, and RS-485 and CAN bus are adopted in communication, and networking economy, convenience can directly be managed the interconnect plane communication with monitoring or protection.
Described voltage suppresses cabinet and is provided with electrification display 10, and described electrification display 10 is connected with high voltage isolator 7, adopts electrification display 10 to carry out data and shows, makes things convenient for the staff to be directly acquainted with current data parameters.
Described surge absorber 2 adopts big capacitance oxidization zinc valve block; can suppress overvoltage point cutting edge of a knife or a sword, this surge absorber 2 adopts big capacitance oxidization zinc valve block, can reduce low residual voltage value greatly; and the big energy that produces in the time of can the absorption system overvoltage is eliminated system overvoltage protection dead band.When using jointly with the product of inhibition system main overvoltage class, effective various overvoltage in the suppression absorbing system, it is through-flow must not be less than 3200A/2ms.
When device normally moves, measure and control device 1 uninterruptedly detects the voltage signal that voltage transformer 5 provides in real time in the cabinet, in case system's generation voltage transformer 5 broken strings, overvoltage, low-voltage, decompression, resonance, the voltage signal that measure and control device 1 can provide according to voltage transformer 5, utilize the disposal ability realization fast and accurately of DSP technology to the real-time collection of waveform, implement the analysis of Fourier level, declare the failure condition of analysis system exactly, and demonstrate fault category, export corresponding switching value contact point signal.
When resonance appears in system, suppress cabinet measure and control device 1 and realize quick acting according to the different frequency of system resonance, export corresponding switching value contact point signal, be used for reporting to the police, and realize liquid crystal display fast.
Embodiment should not be considered as restriction of the present utility model, but any improvement of doing based on spirit of the present utility model, all should be within protection range of the present utility model.
Claims (7)
1. an overvoltage suppresses cabinet, it comprises cabinet, it is characterized in that: be provided with high voltage isolator (7) in the described cabinet, measure and control device (1), voltage transformer (5), surge absorber (2), intelligent switch (3) and a resonance eliminator (4), the last termination bus of described high voltage isolator (7), its lower end connects voltage transformer (5) and surge absorber (2) respectively, the lower end of described voltage transformer (5) connects a resonance eliminator (4) and intelligent switch (3) respectively, the lower end ground connection of described intelligent switch (3), the lower end ground connection of a described resonance eliminator (4), the lower end ground connection of described surge absorber (2), described measure and control device (1) respectively with voltage transformer (5), a resonance eliminator (4) is connected with intelligent switch (3).
2. overvoltage according to claim 1 suppresses cabinet, and it is characterized in that: described high voltage isolator (7) lower end is connected with high-tension fuse.
3. overvoltage according to claim 2 suppresses cabinet, it is characterized in that: described high-tension fuse comprises first high-tension fuse (6) of connecting with voltage transformer (5) upper end and the high-voltage and current-limitation fuse (8) of connecting with surge absorber (2) upper end.
4. overvoltage according to claim 1 suppresses cabinet, and it is characterized in that: described measure and control device (1) is provided with RS485 or the external communication interface of CAN.
5. overvoltage according to claim 1 suppresses cabinet, it is characterized in that: described voltage suppresses cabinet and is provided with electrification display (10), and described electrification display (10) is connected with high voltage isolator (7).
6. overvoltage according to claim 5 suppresses cabinet, it is characterized in that: series capacitance (9) between described electrification display (10) and the high voltage isolator (7).
7. overvoltage according to claim 1 suppresses cabinet, it is characterized in that: described surge absorber (2) adopts big capacitance oxidization zinc valve block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320133862 CN203135431U (en) | 2013-03-22 | 2013-03-22 | Overvoltage suppression cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320133862 CN203135431U (en) | 2013-03-22 | 2013-03-22 | Overvoltage suppression cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203135431U true CN203135431U (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320133862 Expired - Fee Related CN203135431U (en) | 2013-03-22 | 2013-03-22 | Overvoltage suppression cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203135431U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348149A (en) * | 2014-11-06 | 2015-02-11 | 国家电网公司 | Primary side neutral point ground control system for 10kV potential transformer (PT) |
-
2013
- 2013-03-22 CN CN 201320133862 patent/CN203135431U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348149A (en) * | 2014-11-06 | 2015-02-11 | 国家电网公司 | Primary side neutral point ground control system for 10kV potential transformer (PT) |
| CN104348149B (en) * | 2014-11-06 | 2017-10-24 | 国家电网公司 | A kind of 10kV voltage transformers primary side neutral ground control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130814 Termination date: 20150322 |
|
| EXPY | Termination of patent right or utility model |