CN203674711U - Automatic tracking and compensating device for arc-suppression coil of power distribution network - Google Patents
Automatic tracking and compensating device for arc-suppression coil of power distribution network Download PDFInfo
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- CN203674711U CN203674711U CN201320886335.9U CN201320886335U CN203674711U CN 203674711 U CN203674711 U CN 203674711U CN 201320886335 U CN201320886335 U CN 201320886335U CN 203674711 U CN203674711 U CN 203674711U
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- suppression coil
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- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 230000003321 amplification Effects 0.000 claims abstract description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 6
- 230000001629 suppression Effects 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 16
- 230000009977 dual effect Effects 0.000 claims description 14
- 238000013016 damping Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000007935 neutral effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to an automatic tracking and compensating device for an arc-suppression coil of a power distribution network. A primary side of the arc-suppression coil is connected with a grounding transformer, and a secondary side of the arc-suppression coil is connected with a signal injection power supply. The signal injection power supply comprises a signal injection frequency generator, a voltage amplification circuit, a power amplification circuit, an output transformer and a filter circuit which are successively connected, wherein the signal injection frequency generator is connected with a control end, and the filter circuit is connected with the secondary side of the arc-suppression coil. The automatic tracking and compensating device further comprises a detection control circuit. The automatic tracking and compensating device has the advantages that a frequency-constant current signal which is different from the characteristic frequency of the electrical network is injected to the electrical network via the signal injection frequency generator, the frequency-constant current signal is coupled to the electrical network system via the arc-suppression coil, and the arc-suppression coil is automatically tracked and compensated by simultaneously calculating the grounding distrusted capacitance, the out-of-resonance degree and the damping rate; and the automatic tracking and compensating device is also reliable in design principle, simple in structure, and wide in application prospects.
Description
Technical field
The utility model belongs to power safety technique field, relates to a kind of compensation arrangement, especially a kind of power distribution network automatic tracking compensating device for arc-extinguishing coil followed the tracks of.
Background technology
In electric power system, single phase ground fault frequently occurs as a kind of failure mode, and according to incompletely statistics, one-way earth fault accounts for the more than 80% of all fault sums.In the time that the single-phase-to-ground current of electrical network is greater than certain value, ground arc is not easy from horizontal blanking, and fault is expanded, between the neutral point of electrical network and the earth, install arc suppression coil additional, can make capacity current be compensated, thereby the electric current of earth point is reduced, thereby make electric arc can not maintain automatic distinguishing.
At present, conventional arc suppression coil compensation method has both at home and abroad: displacement voltage curve method, online mensuration in real time, frequency variation signal method etc.Because these several principles have the limitation of self, thereby cause the real-time of automatic tracking and compensating not strong.
Utility model content
The purpose of this utility model is, the defect existing for above-mentioned prior art provides design a kind of power distribution network automatic tracking compensating device for arc-extinguishing coil, to solve the problems of the technologies described above.
For achieving the above object, the utility model provides following technical scheme:
A kind of power distribution network automatic tracking compensating device for arc-extinguishing coil, comprises arc suppression coil; It is characterized in that: the primary side of described arc suppression coil is connected with grounding transformer, the secondary side of described arc suppression coil is connected with Injection Signal power supply, described Injection Signal power supply comprises the Injection Signal frequency generator, voltage amplifier circuit, power amplification circuit, output transformer and the filter circuit that connect successively, described Injection Signal frequency generator is connected with control end, described filter circuit is connected with the secondary side of arc suppression coil, and described automatic tracking compensating device also comprises detection control circuit.
Preferably, described detection control circuit comprises CPU management, and described CPU management is connected with voltage transmitter.
Preferably, described CPU management is connected with electric current and voltage transmitter by Injection Signal pre-process circuit.
Preferably, described CPU management is connected with electric current and voltage transmitter by zero-sequence current pre-process circuit.
Preferably, described Injection Signal pre-process circuit comprises the first analog to digital converter, a DSP, the first dual port RAM that connect successively, wherein, described the first analog to digital converter is connected with electric current and voltage transmitter, and described the first dual port RAM is connected with CPU management.
Preferably, described zero-sequence current pre-process circuit comprises the second analog to digital converter, the 2nd DSP, the second dual port RAM that connect successively, wherein, described the second analog to digital converter is connected with electric current and voltage transmitter, and described the second dual port RAM is connected with CPU management.
Preferably, described filter circuit comprises series resonant circuit and antiresonant circuit.
The beneficial effects of the utility model are, inject the constant frequency current signal that differs from electrical network characteristic frequency to electrical network by Injection Signal frequency generator, constant frequency current signal is coupled in network system through arc suppression coil, simultaneously by counting statistics over the ground the parameter such as distributed capacitance, de-humorous degree and ratio of damping to realize the automatic tracking and compensating of arc suppression coil; In addition, the utility model design principle is reliable, simple in structure, has application prospect very widely.
Brief description of the drawings
The functional-block diagram of a kind of power distribution network automatic tracking compensating device for arc-extinguishing coil embodiment that Fig. 1 provides for the utility model.
The testing circuit theory diagram of a kind of power distribution network automatic tracking compensating device for arc-extinguishing coil that Fig. 2 provides for the utility model.
Wherein, 1-arc suppression coil, 2-grounding transformer, 31-signal frequency generator, 32-voltage amplifier circuit, 33-power amplification circuit, 34-output transformer, 35-filter circuit, 4-CPU management, 51-the first analog to digital converter, 52-the one DSP, 53-the first dual port RAM, 6-electric current and voltage transmitter, 71-the second digital to analog converter, 72-the 2nd DSP, 73-the second dual port RAM, 8-voltage transmitter, 9-control end.
Embodiment
Below in conjunction with accompanying drawing and by specific embodiment, the utility model is elaborated, and following examples are to explanation of the present utility model, and the utility model is not limited to following examples.
As depicted in figs. 1 and 2, a kind of power distribution network automatic tracking compensating device for arc-extinguishing coil that the utility model provides, comprise arc suppression coil 1, the primary side of described arc suppression coil 1 is connected with grounding transformer 2, the secondary side of described arc suppression coil 1 is connected with Injection Signal power supply, described Injection Signal power supply comprises the Injection Signal frequency generator 31 connecting successively, voltage amplifier circuit 32, power amplification circuit 33, output transformer 34 and filter circuit 35, described Injection Signal frequency generator is connected with control end 9, described filter circuit 35 is connected with the secondary side of arc suppression coil 1, described automatic tracking compensating device also comprises detection control circuit.
In the present embodiment, described detection control circuit comprises CPU management 4, and described CPU management 4 is connected with voltage transmitter 8.
In the present embodiment, described CPU management 4 is connected with electric current and voltage transmitter 6 by Injection Signal pre-process circuit.
In the present embodiment, described CPU management 4 is connected with electric current and voltage transmitter 6 by zero-sequence current pre-process circuit.
In the present embodiment, described Injection Signal pre-process circuit comprises the first analog to digital converter 51, a DSP52, the first dual port RAM 53 that connect successively, wherein, described the first analog to digital converter 51 is connected with electric current and voltage transmitter 6, and described the first dual port RAM 53 is connected with CPU management 4.
In the present embodiment, described zero-sequence current pre-process circuit comprises the second analog to digital converter 71, the 2nd DSP72, the second dual port RAM 73 that connect successively, wherein, described the second analog to digital converter 71 is connected with electric current and voltage transmitter 6, and described the second dual port RAM 73 is connected with CPU management 4.
In the present embodiment, described filter circuit 35 comprises series resonant circuit and antiresonant circuit, and series resonant circuit and antiresonant circuit all adopt prior art, do not repeat them here.
In the present embodiment, export constant frequency current signal by signal frequency generator 31, this constant frequency current signal is through the coupling of arc suppression coil 1, be coupled to its primary side by the secondary side of arc suppression coil 1, this constant frequency current signal is by getting back to the earth point of arc suppression coil 1 primary side after grounding transformer 2 and the earth, detect control circuit by detecting arc suppression coil 1 electric current of primary side earth point place signal and the signal voltage at bus-bar potential transformer open-delta winding place, and the current signal detecting and voltage signal are processed, according to result after treatment, arc suppression coil 1 is made adjustment, to realize the automatic tracking and compensating of arc suppression coil 1.
Disclosed is above only preferred implementation of the present utility model; but the utility model is not limited thereto; any those skilled in the art can think there is no a creationary variation; and not departing from some improvements and modifications of doing under the utility model principle prerequisite, all should drop in protection range of the present utility model.
Claims (7)
1. a power distribution network automatic tracking compensating device for arc-extinguishing coil, comprises arc suppression coil; It is characterized in that: the primary side of described arc suppression coil is connected with grounding transformer, the secondary side of described arc suppression coil is connected with Injection Signal power supply, described Injection Signal power supply comprises the Injection Signal frequency generator, voltage amplifier circuit, power amplification circuit, output transformer and the filter circuit that connect successively, described Injection Signal frequency generator is connected with control end, described filter circuit is connected with the secondary side of arc suppression coil, and described automatic tracking compensating device also comprises detection control circuit.
2. power distribution network automatic tracking compensating device for arc-extinguishing coil according to claim 1, is characterized in that: described detection control circuit comprises CPU management, and described CPU management is connected with voltage transmitter.
3. power distribution network automatic tracking compensating device for arc-extinguishing coil according to claim 2, is characterized in that: described CPU management is connected with electric current and voltage transmitter by Injection Signal pre-process circuit.
4. according to the power distribution network automatic tracking compensating device for arc-extinguishing coil described in claim 2 or 3, it is characterized in that: described CPU management is connected with electric current and voltage transmitter by zero-sequence current pre-process circuit.
5. power distribution network automatic tracking compensating device for arc-extinguishing coil according to claim 4, it is characterized in that: described Injection Signal pre-process circuit comprises the first analog to digital converter, a DSP, the first dual port RAM that connect successively, wherein, described the first analog to digital converter is connected with electric current and voltage transmitter, and described the first dual port RAM is connected with CPU management.
6. power distribution network automatic tracking compensating device for arc-extinguishing coil according to claim 5, it is characterized in that: described zero-sequence current pre-process circuit comprises the second analog to digital converter, the 2nd DSP, the second dual port RAM that connect successively, wherein, described the second analog to digital converter is connected with electric current and voltage transmitter, and described the second dual port RAM is connected with CPU management.
7. power distribution network automatic tracking compensating device for arc-extinguishing coil according to claim 6, is characterized in that: described filter circuit comprises series resonant circuit and antiresonant circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320886335.9U CN203674711U (en) | 2013-12-31 | 2013-12-31 | Automatic tracking and compensating device for arc-suppression coil of power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320886335.9U CN203674711U (en) | 2013-12-31 | 2013-12-31 | Automatic tracking and compensating device for arc-suppression coil of power distribution network |
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| Publication Number | Publication Date |
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| CN203674711U true CN203674711U (en) | 2014-06-25 |
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| CN201320886335.9U Expired - Lifetime CN203674711U (en) | 2013-12-31 | 2013-12-31 | Automatic tracking and compensating device for arc-suppression coil of power distribution network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964001A (en) * | 2018-08-24 | 2018-12-07 | 国网河北省电力有限公司电力科学研究院 | Arc suppression coil of power distribution network tuning methods, terminal device and system |
| CZ308721B6 (en) * | 2014-08-28 | 2021-03-24 | Ege, Spol.S R.O. | Method and device for automatically adjusting continuously and/or discretely tunable quenching chokes in the compensated network of the electrical system |
-
2013
- 2013-12-31 CN CN201320886335.9U patent/CN203674711U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ308721B6 (en) * | 2014-08-28 | 2021-03-24 | Ege, Spol.S R.O. | Method and device for automatically adjusting continuously and/or discretely tunable quenching chokes in the compensated network of the electrical system |
| CN108964001A (en) * | 2018-08-24 | 2018-12-07 | 国网河北省电力有限公司电力科学研究院 | Arc suppression coil of power distribution network tuning methods, terminal device and system |
| CN108964001B (en) * | 2018-08-24 | 2020-04-21 | 国网河北省电力有限公司电力科学研究院 | Power distribution network arc suppression coil tuning method, terminal equipment and system |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
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Granted publication date: 20140625 |