CN105188326A - Filtering system for inhibiting high-frequency strong interference signal of transformer station - Google Patents
Filtering system for inhibiting high-frequency strong interference signal of transformer station Download PDFInfo
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- CN105188326A CN105188326A CN201410240489.XA CN201410240489A CN105188326A CN 105188326 A CN105188326 A CN 105188326A CN 201410240489 A CN201410240489 A CN 201410240489A CN 105188326 A CN105188326 A CN 105188326A
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- interference signal
- transformer station
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- interference
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Abstract
The invention discloses a filtering system for inhibiting a high-frequency strong interference signal of a transformer station, and the system comprises an interference signal generation device coupled to a remote communication cable. The interference signal generation device comprises a pulse source, a front transition segment, parallel plate segments, a rear transition segment, and a terminal device, wherein the pulse source, the front transition segment, the parallel plate segment, the rear transition segment and the terminal device are connected sequentially. The front and rear transition segments are two inclined metal plates which are arranged in an oppositely inclined manner. The parallel plate segments form a working space therebetween. The system also comprises a shielding box and an interference signal collection device disposed in the shielding box. The shielding box comprises a box body and a door frame, wherein the box body is provided with a cut-off waveguide tube, and the door frame is provided with a finger joint spring. The remote communication cable sequentially passes through the finger joint spring and the cut-off waveguide tube. The interference signal collection device comprises an oscilloscope and a probe connected with the oscilloscope. The filtering system can simulate interference signals generated by electromagnetic pulses for all equipment of the transformer station well, can formulate corresponding anti-interference measures according to the interference signals, and can guarantee the normal operation of the transformer station.
Description
Technical field
The present invention relates to technical field of power systems, particularly relating to a kind of for suppressing the filtering system of transformer station's high frequency high reject signal.
Background technology
Transformer station is some device assembles, and in order to cut off or to connect, to change or adjustment voltage, in electric power system, transformer station is the assembly place of transmission and disttrbution.Equipment in transformer station has switch, transformer, protective device etc.; when transformer station meet thunderbolt fault or switch time; a transient electromagnetic pulse can be produced; this transient electromagnetic pulse produces an interference signal to the equipment in transformer station, protective device etc., thus affects the normal operation of each equipment.In order to ensure the normal operation of each equipment in transformer station, should suppress or eliminate the interference effect of this transient electromagnetic pulse to transformer station.
Summary of the invention
The defect of prior art and various weak point in view of the above; the technical problem to be solved in the present invention is to provide a kind of for suppressing the filtering system of transformer station's high frequency high reject signal; this filtering system can simulate the interference effect that transient electromagnetic pulse produces equipment in transformer station and protective device, and then provides strong foundation for eliminating interference effect.
For achieving the above object, the invention provides a kind of for suppressing the filtering system of transformer station's high frequency high reject signal, comprise the interference signal generation device be coupled on remote signalling cable, this interference signal generation device comprises the clock, front changeover portion, parallel-plate section, rear changeover portion and the terminal organ that are connected successively, described front changeover portion and rear changeover portion are the oblique metallic plate that two relative tilts are arranged, and form a working space between described parallel-plate section; Also comprise a shielded box and be located at the interference signal harvester in shielded box, described shielded box comprises casing and doorframe, described casing is provided with a cut-off waveguide, and described doorframe is provided with a finger spring, and described remote signalling cable passes successively from finger spring and cut-off waveguide; The probe that described interference signal harvester comprises oscilloscope and is connected with oscilloscope.
Further, described remote signalling cable is also fixed with interference suppression equipment, this interference suppression equipment comprises the shell that is made of plastics and establishes high magnetic conductor in the enclosure, and described shell side is provided with groove, and opposite side is provided with the projection suitable with groove.
Preferably, described probe is also connected in series with a signal pickup assembly attenuator mutually by an adapter.
Further, described clock is the capacitor discharge type clock generators of two mutual series connection, and described capacitor discharge type clock generator comprises DC high-voltage source, electric capacity and inductance, and described electric capacity is in parallel with DC high-voltage source, inductance and high direct voltage source-series.
Preferably, described terminal organ is two water resistances of 120 ohm parallel with one another.
Preferably, described working space is long is 2.5m, and wide is 2m, and height is 2m.
The present invention relates to for suppressing the filtering system of transformer station's high frequency high reject signal to have following beneficial effect:
This filtering system can be good at the interference signal that simulation transient electromagnetic pulse produces equipment each in transformer station, thus can draft corresponding interference protection measure according to interference signal, ensures the normal operation of transformer station.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, coordinates accompanying drawing to be described in detail to this patent below with preferred embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of interference signal generation device in the present invention.
Fig. 2 is the structural representation of clock in Fig. 1.
Fig. 3 is the structural representation of shielded box in the present invention.
Fig. 4 is the structural representation of interference signal harvester in the present invention.
Fig. 5 is the structural representation of interference suppression equipment in the present invention.
Element numbers explanation
1 interference signal generation device
11 clocks
Changeover portion before 12
13 parallel-plate sections
Changeover portion after 14
15 terminal organs
16 working spaces
2 shielded boxes
21 finger springs
22 cut-off waveguides
3 interference signal harvesters
31 oscilloscopes
32 probes
33 signal pickup assembly attenuators
4 interference suppression equipments
41 shells
42 high magnetic conductors
43 grooves
44 is protruding
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figure 1, the invention provides a kind of for suppressing the filtering system of transformer station's high frequency high reject signal, comprise the interference signal generation device 1 be coupled on remote signalling cable, this interference signal generation device 1 comprises the clock 11, front changeover portion 12, parallel-plate section 13, rear changeover portion 14 and the terminal organ 15 that are connected successively, described front changeover portion 12 and rear changeover portion 14 are the oblique metallic plate that two relative tilts are arranged, a working space 16 is formed between described parallel-plate section 13, preferably, described working space 16 is long is 2.5m, wide is 2m, and height is 2m; The interference signal harvester 3 also comprising a shielded box 2 and be located in shielded box 2, see Fig. 3 and Fig. 4, described shielded box 2 comprises casing and doorframe, described casing is provided with a cut-off waveguide 22, described doorframe is provided with a finger spring 21, and described remote signalling cable passes successively from finger spring 21 and cut-off waveguide 22; The probe 32 that described interference signal harvester 3 comprises oscilloscope 31 and is connected with oscilloscope 31.
In this filtering system, the clock 11 of interference signal generation device 1 is for generation of high frequency strong-electromagnetic field, to simulate thunderbolt, fault, the transient electromagnetic pulse produced in converting station electric power system during switch, simultaneously by the couples high frequency interference on remote signalling cable of this high frequency strong-electromagnetic field, this interference signal reduces through popping one's head in after 32, finally enter into the interference signal harvester 3 being positioned at shielded box 2, for completing the collection of interference signal, store and display, described oscilloscope 31 preferably adopts TEKTPS2024 oscilloscope, this oscilloscope has four passages, can thinking interference signal be gathered simultaneously and show, raise the efficiency.Described shielded box 2 enters a certain region, the interference signal harvester 3 of interference shielding case 2 inside for preventing outside radiation electric magnetic energy, thus ensures that interference signal harvester 3 is measured accurately and do not damage; After finger spring 21 on described doorframe ensures to visit in pass, radio frequency interference has shielding left and right, can keep in touch the radio shielding integrality in face; Cut-off waveguide 22 on casing ensures that waveguide is in cut-off state relative to the radio frequency that will shield.
In addition, high frequency strong-electromagnetic field interference magnitude on remote signalling cable that interference signal generation device 1 produces is larger, certain impact can be produced to final measurement result, therefore in the present invention, described remote signalling cable is also fixed with interference suppression equipment 4, sees Fig. 5, this interference suppression equipment 4 comprises the shell 41 be made of plastics and the high magnetic conductor 42 be located in shell 41, described shell 41 side is provided with groove 43, and opposite side is provided with the projection 44 suitable with groove 43.By shell 41 upper groove 43 and protruding 44 cooperatively interact and can this interference suppression equipment 4 is stuck on the heart yearn of remote signalling cable, described interference suppression equipment 4 is equivalent to a resistance and an inductance, inductance can suppress the steepness of interference signal, and the ability of interference signal is stored, the energy of interference signal can consume by resistance, and distribute with the form of heat, therefore high magnetic conductor 42 can suppress amplitude and the steepness of interference signal, thus the interference signal produced in suppression remote signalling cable.
Preferably, the interference of being coupled on remote signalling cable due to interference signal generation device 1 is very large, beyond the measuring range of interference signal harvester 3, therefore in the present embodiment, as shown in Figure 4, described probe 32 is also connected in series with a signal pickup assembly attenuator 33 mutually by an adapter.Interference signal can be decayed 10 times by described signal pickup assembly attenuator 33, and pop one's head in and 32 itself also interference signal can be decayed 10 times, therefore after both are connected in series by adapter, interference signal can be decayed 100 times, interference signal after decay directly enters interference signal harvester 3, the multiplication factor now adjusting interference signal harvester 3 is 100 times, then the signal shown by interference signal harvester 3 is actual interference signal.
Further, see Fig. 2, described clock 11 is two capacitor discharge type clock generators of mutually connecting, described capacitor discharge type clock generator comprises DC high-voltage source, electric capacity C and inductance L s, described electric capacity is in parallel with DC high-voltage source, inductance and high direct voltage source-series, it is the RLC discharged in series loop of a standard, and the equation of circuit is
electric capacity C that is mutually noninductive by DC high-voltage source or low inductance charges to U0, then discharged by switch phase load under trigger condition, the voltage peak that clock 11 exports can up to 120KV, and continuously adjustabe, therefore can growing × wide × height=2.5m × 2.0m × 2.0m working space 16 in form peak electric field up to 50KV/m, the shortest 2.5ns that reaches of rising edge of pulse, waveform widths 20ns-30ns, E field polarization direction vertically upward.
Preferably, described terminal organ 15 is two water resistances of 120 ohm parallel with one another.
In sum, the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above to the embodiment of the present invention provide a kind of for suppressing the filtering system of transformer station's high frequency high reject signal to be described in detail; for one of ordinary skill in the art; according to the thought of the embodiment of the present invention; all will change in specific embodiments and applications; in sum; this description should not be construed as limitation of the present invention, and all any changes made according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (6)
1. one kind for suppressing the filtering system of transformer station's high frequency high reject signal, it is characterized in that: comprise the interference signal generation device (1) be coupled on remote signalling cable, this interference signal generation device (1) comprises the clock (11), front changeover portion (12), parallel-plate section (13), rear changeover portion (14) and the terminal organ (15) that are connected successively, described front changeover portion (12) and rear changeover portion (14) are the oblique metallic plate that two relative tilts are arranged, and form a working space (16) between described parallel-plate section (13); Also comprise a shielded box (2) and be located at the interference signal harvester (3) in shielded box (2), described shielded box (2) comprises casing and doorframe, described casing is provided with a cut-off waveguide (22), described doorframe is provided with a finger spring (21), and described remote signalling cable passes successively from finger spring (21) and cut-off waveguide (22); The probe (32) that described interference signal harvester (3) comprises oscilloscope (31) and is connected with oscilloscope (31).
2. according to claim 1 for suppressing the filtering system of transformer station's high frequency high reject signal, it is characterized in that: described remote signalling cable is also fixed with interference suppression equipment (4), this interference suppression equipment (4) comprises the shell (41) be made of plastics and the high magnetic conductor (42) be located in shell (41), described shell (41) side is provided with groove (43), and opposite side is provided with the projection (44) suitable with groove (43).
3. according to claim 1 for suppressing the filtering system of transformer station's high frequency high reject signal, it is characterized in that: described probe (32) is also connected in series with a signal pickup assembly attenuator (33) mutually by an adapter.
4. according to claim 1 for suppressing the filtering system of transformer station's high frequency high reject signal, it is characterized in that: described clock (11) is two capacitor discharge type clock generators of mutually connecting, described capacitor discharge type clock generator comprises DC high-voltage source, electric capacity and inductance, described electric capacity is in parallel with DC high-voltage source, inductance and high direct voltage source-series.
5. according to claim 1 for suppressing the filtering system of transformer station's high frequency high reject signal, it is characterized in that: described terminal organ (15) is two water resistances of 120 ohm parallel with one another.
6. according to claim 1 for suppressing the filtering system of transformer station's high frequency high reject signal, it is characterized in that: described working space (16) is long is 2.5m, and wide is 2m, and height is 2m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410240489.XA CN105188326B (en) | 2014-05-30 | 2014-05-30 | For suppressing the filtering system of transformer station's high frequency high reject signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410240489.XA CN105188326B (en) | 2014-05-30 | 2014-05-30 | For suppressing the filtering system of transformer station's high frequency high reject signal |
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| CN105188326A true CN105188326A (en) | 2015-12-23 |
| CN105188326B CN105188326B (en) | 2018-01-16 |
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| CN201410240489.XA Active CN105188326B (en) | 2014-05-30 | 2014-05-30 | For suppressing the filtering system of transformer station's high frequency high reject signal |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510669A (en) * | 2009-01-24 | 2009-08-19 | 国网电力科学研究院 | Shielding design method for protection chamber |
| CN201788255U (en) * | 2010-08-19 | 2011-04-06 | 河南省电力公司郑州供电公司 | Partial discharge ultra-high frequency online detecting system |
| CN102412514A (en) * | 2011-11-02 | 2012-04-11 | 苏州爱信输配电设备有限公司 | Box-type substation shell possessing electromagnetic shielding function |
| CN203984874U (en) * | 2014-05-30 | 2014-12-03 | 国家电网公司 | For suppressing the filtering system of transformer station's high frequency high reject signal |
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2014
- 2014-05-30 CN CN201410240489.XA patent/CN105188326B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510669A (en) * | 2009-01-24 | 2009-08-19 | 国网电力科学研究院 | Shielding design method for protection chamber |
| CN201788255U (en) * | 2010-08-19 | 2011-04-06 | 河南省电力公司郑州供电公司 | Partial discharge ultra-high frequency online detecting system |
| CN102412514A (en) * | 2011-11-02 | 2012-04-11 | 苏州爱信输配电设备有限公司 | Box-type substation shell possessing electromagnetic shielding function |
| CN203984874U (en) * | 2014-05-30 | 2014-12-03 | 国家电网公司 | For suppressing the filtering system of transformer station's high frequency high reject signal |
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| CN105188326B (en) | 2018-01-16 |
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