CN203396821U - Passive signal detection device - Google Patents
Passive signal detection device Download PDFInfo
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- CN203396821U CN203396821U CN201320408678.4U CN201320408678U CN203396821U CN 203396821 U CN203396821 U CN 203396821U CN 201320408678 U CN201320408678 U CN 201320408678U CN 203396821 U CN203396821 U CN 203396821U
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- memory device
- voltage
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 241000519996 Teucrium chamaedrys Species 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 abstract 2
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002683 foot Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model discloses a passive signal detection device which employs a voltage detection loop and a motion memory device connected with the voltage detection loop, wherein the voltage detection loop receives transient voltage or residual voltage, and generates input signals which drive the motion memory device remained in a motion memory device. A processor connected with the motion memory device identifies the state, detects the transient voltage or residual voltage on a circuit at a power-off section, and isolates the fault section.
Description
Technical field
The utility model relates to power distribution network technical field, particularly a kind of passive signal checkout equipment.
Background technology
Great change along with modern power systems generation, implement electricity market operating mechanism open and that encourage competition, usually there is circuit voltage failure problem in some electric system quality problems, particularly distribution system, caused showing great attention to of domestic and international work about electric power person and associated user.
In distribution system; in circuit generation permanent fault; outlet protection action; after one specified time, reclosing action, coincides with fault or closing by hand in fault, and protective relay is by rear Accelerated trip; the voltage characteristic showing is exactly the voltage that occurs several cycles; then disappear, the voltage of appearance has obvious fault signature, is referred to as instantaneous voltage.
When the instantaneous voltage on existing voltage-time type distribution terminal detection line or residual voltage, must when having power supply and normal operation, distribution terminal just can detect.While there is instantaneous voltage or residual voltage fault for the section that there is no energising, distribution terminal detects not out, can not realize automatic fault isolation, has to a certain degree defect.
Summary of the invention
For addressing the above problem, the purpose of this utility model is to provide a kind of passive signal voltage detection device, solves while there is instantaneous voltage or residual voltage for the section that there is no energising the problem that distribution terminal can't detect, thereby realize automatic fault isolation, eliminate defect.
The technical scheme that the invention for solving the technical problem adopts is:
A voltage detection device, comprising:
Voltage detecting loop, described voltage detecting loop, for when input voltage reaches the magnitude of voltage of setting, produces output signal;
Movement memory device, with the electrical connection of voltage detecting loop, for receiving output signal, movement memory device can be remembered this output signal and keep movement memory state always simultaneously;
Checkout equipment, with the electrical connection of movement memory device, for detection of the state of movement memory device, and recovers movement memory device to original state.
Described movement memory device adopts self-sustaining midget relay or solid-state relay.
Described checkout equipment is processor, between described processor and movement memory device, adopts photoelectric isolating device to isolate, described photoelectric isolating device and movement memory device, processor electrical connection.
The beneficial effects of the utility model are:
A kind of passive signal voltage detection device that the utility model adopts, when there is instantaneous voltage or residual voltage in the section that there is no energising, distribution terminal is identified this instantaneous voltage or residual voltage, and after detecting, this fault section is isolated, distribution terminal need not can realize by power supply, the defect that cannot detect in having eliminated at present.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the utility model is described in further detail.
Fig. 1 is the utility model voltage detecting loop circuit figure;
Fig. 2 is the utility model movement memory device circuitry figure.
Embodiment
The utility model adopts a kind of passive electrical pressure detection method, voltage detecting loop and movement memory device are installed on the power panel of distribution terminal, instantaneous voltage or the residual voltage that can effectively to the section of not switching on, occur are identified, and after identification, isolate this fault section.
With reference to the voltage detecting loop circuit figure shown in Fig. 1, when detecting instantaneous voltage or residual voltage, in figure, 5,6 two pin connect power supply, and for receiving input voltage, 7,8 pin connect movement memory device, 3,10 pin ground connection, and 1,2,4 is three auxiliary foots.Integrated circuit (IC) 1 has 1,2,3 San Ge angles, when the 1 pin input voltage of IC1 is less than 4.25V, and the triode conducting of IC1 inside, the high level that 5,6,7 pin are introduced, through IC1 ground connection; The triode of IC1 inside cut-off when the 1 pin input voltage of IC1 is greater than 4.25V, the high level that 7 pin are introduced punctures conducting TR2 after ZD3, makes 8 pin ground connection, drive actions memory device; After the high level that 6 pin are introduced is full of electricity by C3, puncture ZD2, make TR1 conducting, at this moment TR2 base current is shunted by TR1, makes TR2 cut-off, produces the effect of ONESHOT one shots.
With reference to the device circuitry of movement memory shown in Fig. 2 figure, its input end is connected with 7,8 two pin that detect in loop circuit, movement memory device adopts self-sustaining midget relay or solid-state relay, shown in figure, movement memory device is connected with processor, described processor is arranged among distribution terminal, is the central processing unit of distribution terminal.Movement memory device has movement memory and keeps and two kinds of forms of involution, and movement memory device is corresponding instantaneous voltage or residual voltage fault when movement memory keeps form, when involution form, represents there is no fault.Processor, for detection of the state of movement memory device, has judged whether instantaneous voltage or residual voltage, and simultaneous processor is also for recovering movement memory device to involution state, and described involution state is the not driven front original state of movement memory device.Between movement memory device and processor, adopt photoelectric isolating device to isolate, photoelectric isolating device is with corresponding driving circuit, and described photoelectric isolating device and movement memory device, processor are electrically connected.
When 5 of voltage detecting loop, when 6 pin receive input voltage, when if this input voltage reaches the magnitude of voltage of setting, the 1 pin input voltage that is IC1 is greater than 4.25V, now, the triode cut-off of IC1 inside, the high level that 7 pin are introduced punctures conducting TR2 after ZD3, make 8 pin ground connection, 7, output signal drive actions memory device between 8 pin, movement memory device can be remembered this output signal, and remain on movement memory state, now, when processor detects this movement memory state, show to have produced instantaneous voltage or residual voltage, just can effectively to this section, isolate.
It should be noted that, the instantaneous voltage that the utility model can detect or the scope of residual voltage are more than life period 10ms, and amplitude is 20%Un, and wherein Un is rated voltage.The utility model not only can be applied to distribution terminal, also can be applied to other circuit arrangement.
The above, be preferred embodiment of the present utility model, and the utility model is not limited to above-mentioned embodiment, as long as it reaches technique effect of the present utility model with identical means, all should belong to protection domain of the present utility model.
Claims (3)
1. a passive voltage detection device, is characterized in that, comprising:
Voltage detecting loop, described voltage detecting loop, for when input voltage reaches the magnitude of voltage of setting, produces output signal;
Movement memory device, with the electrical connection of voltage detecting loop, for receiving output signal, movement memory device can be remembered this output signal and keep movement memory state always simultaneously;
Checkout equipment, with the electrical connection of movement memory device, for detection of the state of movement memory device, and recovers movement memory device to original state.
2. a kind of passive voltage detection device according to claim 1, is characterized in that, described movement memory device adopts self-sustaining midget relay or solid-state relay.
3. a kind of passive voltage detection device according to claim 2, it is characterized in that, described checkout equipment is processor, between described processor and movement memory device, adopts photoelectric isolating device to isolate, described photoelectric isolating device and movement memory device, processor electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320408678.4U CN203396821U (en) | 2013-07-10 | 2013-07-10 | Passive signal detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320408678.4U CN203396821U (en) | 2013-07-10 | 2013-07-10 | Passive signal detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203396821U true CN203396821U (en) | 2014-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320408678.4U Expired - Fee Related CN203396821U (en) | 2013-07-10 | 2013-07-10 | Passive signal detection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203396821U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834521A (en) * | 2017-10-19 | 2018-03-23 | 国网陕西省电力公司电力科学研究院 | A kind of voltage check device and system for Distribution Network Failure processing |
-
2013
- 2013-07-10 CN CN201320408678.4U patent/CN203396821U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834521A (en) * | 2017-10-19 | 2018-03-23 | 国网陕西省电力公司电力科学研究院 | A kind of voltage check device and system for Distribution Network Failure processing |
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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: 20140115 Termination date: 20200710 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |