CN202854245U - Temporary ground wire detection device for transformer substation - Google Patents
Temporary ground wire detection device for transformer substation Download PDFInfo
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- CN202854245U CN202854245U CN 201220469260 CN201220469260U CN202854245U CN 202854245 U CN202854245 U CN 202854245U CN 201220469260 CN201220469260 CN 201220469260 CN 201220469260 U CN201220469260 U CN 201220469260U CN 202854245 U CN202854245 U CN 202854245U
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- limiting resistance
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Abstract
The utility model discloses a temporary ground wire detection device for a transformer substation, which comprises a signal source VSS, a current limiting circuit, a resonance and voltage division circuit, a singlechip U1 and a display circuit, wherein the output end of the signal source VSS is connected with the input end of the current limiting circuit, the output end of the current limiting circuit is connected with the input end of the resonance and the voltage division circuit and a line in the transformer substation, the output end of the resonance and voltage division circuit is connected with the corresponding input end of the singlechip U1, and the output end of the singlechip U1 is connected with the input end of display circuit. The temporary ground wire detection device for the transformer substation has the beneficial effects that whether there is a temporary ground wire in the transformer substation can be effectively detected, and has the characteristics of portability and convenience in operation.
Description
Technical field
The utility model relates to provisionally line detector of a kind of transformer station.
Background technology
At present, prevent that tearing the switching on earth wire accident that ground wire causes in the Substation Station open because of leakage occurs repeatedly, the Main Means that prevents this accident is the management work of strengthening interim ground wire, relies on staff's subjective ability to solve this problem.Wait error to occur because the staff has to forget in working at ordinary times unavoidably, so also just can not stop the switching on earth wire accident fully by the means of labor management.
The utility model content
Technical problem to be solved in the utility model provides provisionally line detector of a kind of convenient to operation, portable transformer station.
The technical scheme that its technical matters that solves the utility model adopts is:
The utility model comprises signal source VSS, current-limiting circuit, resonance and bleeder circuit, single-chip microcomputer U1 and display circuit; The input end of the output termination current-limiting circuit of described signal source VSS; The output terminal of described current-limiting circuit connects respectively input end and the Divergent line of resonance and bleeder circuit; The output terminal of described resonance and bleeder circuit connects the respective input of single-chip microcomputer U1; The input end of the output termination display circuit of described single-chip microcomputer U1.
Described current-limiting circuit is comprised of current-limiting resistance R1; The output terminal of the M termination signal source VSS of described current-limiting resistance R1; The N end of described current-limiting resistance R1 is connected with A phase, B phase, the C of Divergent line respectively.
Described resonance and bleeder circuit comprise inductance L, capacitor C 1, voltage dependent resistor (VDR) R2, divider resistance R3-R4 and variable resistor R7; The series resonant circuit that described inductance L and capacitor C 1 form is connected between the N end and ground of current-limiting resistance R1; Described voltage dependent resistor (VDR) R2 is connected between the N end and ground of current-limiting resistance R1; In parallel with voltage dependent resistor (VDR) R2 after described divider resistance R3 and the divider resistance R4 series connection; The termination divider resistance R3 of described variable resistor R7 and the node of divider resistance R4.
Described resonance and bleeder circuit also comprise filter capacitor C2; Described filter capacitor C2 is connected between the G end and ground of variable resistor R7.
The model of described single-chip microcomputer U1 is STC12C5A60S2; The input terminal P1.0 of described single-chip microcomputer U1 connects the G end of variable resistor R7.
Described display circuit is comprised of current-limiting resistance R5-R6 and LED 1-LED2; Described current-limiting resistance R5 be connected between the lead-out terminal P3.3 and ground of single-chip microcomputer U1 after LED 1 is connected; Described current-limiting resistance R6 be connected between the lead-out terminal P3.4 and ground of single-chip microcomputer U1 after LED 2 is connected.
The beneficial effects of the utility model are can effectively detect in the current transformer station to have or not temporary ground wire, have characteristics portable, convenient to operation.
Description of drawings
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Fig. 3 is the algorithm filtering process flow diagram of single-chip microcomputer U1.
In Fig. 2, L1 is that Divergent line, L2 are that alive circuit, VSS are that signal source, R1, R5 and R6 are that current-limiting resistance, R2 are voltage dependent resistor (VDR)s, and R3-R4 is that divider resistance, U1 are that single-chip microcomputer, LED1 are that light emitting diode (redness), LED2 are that light emitting diode (green), C1 are that electric capacity, C2 are that filter capacitor, L are that inductance, R7 are that variable resistor, S are interim ground wire analog switch (for the switch of explanation the utility model principle of work hypothesis).
Embodiment
By the embodiment shown in the accompanying drawing 1,2 as can be known, the utility model comprises signal source VSS, current-limiting circuit, resonance and bleeder circuit, single-chip microcomputer U1 and display circuit; The input end of the output termination current-limiting circuit of described signal source VSS; The output terminal of described current-limiting circuit connects respectively input end and the Divergent line of resonance and bleeder circuit; The output terminal of described resonance and bleeder circuit connects the respective input of single-chip microcomputer U1; The input end of the output termination display circuit of described single-chip microcomputer U1.
Described current-limiting circuit is comprised of current-limiting resistance R1; The output terminal of the M termination signal source VSS of described current-limiting resistance R1; The N end of described current-limiting resistance R1 is connected with A phase, B phase, the C of Divergent line respectively.
Described resonance and bleeder circuit comprise inductance L, capacitor C 1, voltage dependent resistor (VDR) R2, divider resistance R3-R4 and variable resistor R7; The series resonant circuit that described inductance L and capacitor C 1 form is connected between the N end and ground of current-limiting resistance R1; Described voltage dependent resistor (VDR) R2 is connected between the N end and ground of current-limiting resistance R1; In parallel with voltage dependent resistor (VDR) R2 after described divider resistance R3 and the divider resistance R4 series connection; The termination divider resistance R3 of described variable resistor R7 and the node of divider resistance R4.
Described resonance and bleeder circuit also comprise filter capacitor C2; Described filter capacitor C2 is connected between the G end and ground of variable resistor R7.
The model of described single-chip microcomputer U1 is STC12C5A60S2; The input terminal P1.0 of described single-chip microcomputer U1 connects the G end of variable resistor R7.
Described display circuit is comprised of current-limiting resistance R5-R6 and LED 1-LED2; Described current-limiting resistance R5 be connected between the lead-out terminal P3.3 and ground of single-chip microcomputer U1 after LED 1 is connected; Described current-limiting resistance R6 be connected between the lead-out terminal P3.4 and ground of single-chip microcomputer U1 after LED 2 is connected.
Principle of work of the present utility model:
By the embodiment shown in the accompanying drawing 1-2 as can be known, inductance L and capacitor C 1 form series resonant circuit, if when having interim ground wire (S is closed), signal source VSS, current-limiting resistance R1, Divergent line L1, interim ground wire consists of the loop, current-limiting resistance R1 is much larger than the impedance of Divergent line during design, so bear voltage on the current-limiting resistance R1 and signal source voltage is about the same, the voltage waveform that get on the divider resistance R4 this moment is interference waveform, filter capacitor C2 carries out low-pass filtering behind the R7 variable resistor, the filtering processing and the predefined threshold values of single-chip microcomputer U1 (ratings of input signal corresponding frequencies component) that pass through single-chip microcomputer U1 compare again, numerical value is less than threshold values after filtering this moment, then the lead-out terminal P3.3 of single-chip microcomputer U1 exports high level, lead-out terminal P3.4 output low level, lead-out terminal P3.3 output high level is through current-limiting resistance R5 conducting LED 1, when red, prompting has interim ground wire.On the contrary, if when not having interim ground wire (S disconnection), signal source VSS, current-limiting resistance R1, Divergent line L1, interim ground wire can't consist of the loop, bear theoretical value this moment on the current-limiting resistance R1 be zero, the waveform of the voltage of getting on the divider resistance R4 is the waveform of signal source VSS and the stack of interference, and the amplitude of the voltage of getting on the divider resistance R4 is no more than the ceiling voltage that single-chip microcomputer U1 can bear, filter capacitor C2 carries out low-pass filtering behind the R7 variable resistor, processed by single-chip microcomputer U1 filtering again, threshold values predefined with it relatively, numerical value is greater than threshold values after filtering this moment, the lead-out terminal P3.3 output low level of single-chip microcomputer U1 then, lead-out terminal P3.4 exports high level, and lead-out terminal P3.4 output high level is through current-limiting resistance R6 conducting LED 2, green light is bright, and prompting is without interim ground wire.
Hence one can see that, and the voltage swing that has or not interim ground wire to cause current-limiting resistance R1 to bear in the transformer station is different, is used as judging that with this foundation that has or not haywire in station drives different LED 1 and LED 2.
The algorithm filtering of single-chip microcomputer U1 (seeing accompanying drawing 3) mainly comprises following concrete steps:
(1) filter brings into operation, system initialization table: single-chip microcomputer U1 is with original internal storage location zero clearing, for next step storage A/D transformation result is prepared;
(2) the discrete data sequence with the A/D conversion is deposited into the specific internal storage location of single-chip microcomputer U1 (coefficient table);
(3) data in the coefficient table are carried out inverted order, carry out the FFT computing for next step data and prepare;
(4) call first the data of carrying out inverted order in the coefficient table at the internal storage location of depositing in advance the FFT program and carry out again the FFT computing;
(5) amplitude of its corresponding frequencies component of output after computing is finished;
(6) finish the algorithm filtering.
Claims (6)
1. transformer station line detector provisionally is characterized in that comprising signal source VSS, current-limiting circuit, resonance and bleeder circuit, single-chip microcomputer U1 and display circuit; The input end of the output termination current-limiting circuit of described signal source VSS; The output terminal of described current-limiting circuit connects respectively input end and the Divergent line of resonance and bleeder circuit; The output terminal of described resonance and bleeder circuit connects the respective input of single-chip microcomputer U1; The input end of the output termination display circuit of described single-chip microcomputer U1.
2. a kind of transformer station according to claim 1 line detector provisionally is characterized in that described current-limiting circuit is comprised of current-limiting resistance R1; The output terminal of the M termination signal source VSS of described current-limiting resistance R1; The N end of described current-limiting resistance R1 is connected with A phase, B phase, the C of Divergent line respectively.
3. a kind of transformer station according to claim 1 and 2 line detector provisionally is characterized in that described resonance and bleeder circuit comprise inductance L, capacitor C 1, voltage dependent resistor (VDR) R2, divider resistance R3-R4 and variable resistor R7; The series resonant circuit that described inductance L and capacitor C 1 form is connected between the N end and ground of current-limiting resistance R1; Described voltage dependent resistor (VDR) R2 is connected between the N end and ground of current-limiting resistance R1; In parallel with voltage dependent resistor (VDR) R2 after described divider resistance R3 and the divider resistance R4 series connection; The termination divider resistance R3 of described variable resistor R7 and the node of divider resistance R4.
4. a kind of transformer station according to claim 3 line detector provisionally is characterized in that described resonance and bleeder circuit also comprise filter capacitor C2; Described filter capacitor C2 is connected between the G end and ground of variable resistor R7.
5. a kind of transformer station according to claim 4 line detector provisionally, the model that it is characterized in that described single-chip microcomputer U1 is STC12C5A60S2; The input terminal P1.0 of described single-chip microcomputer U1 connects the G end of variable resistor R7.
6. a kind of transformer station according to claim 5 line detector provisionally is characterized in that described display circuit is comprised of current-limiting resistance R5-R6 and LED 1-LED2; Described current-limiting resistance R5 be connected between the lead-out terminal P3.3 and ground of single-chip microcomputer U1 after LED 1 is connected; Described current-limiting resistance R6 be connected between the lead-out terminal P3.4 and ground of single-chip microcomputer U1 after LED 2 is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220469260 CN202854245U (en) | 2012-09-15 | 2012-09-15 | Temporary ground wire detection device for transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220469260 CN202854245U (en) | 2012-09-15 | 2012-09-15 | Temporary ground wire detection device for transformer substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202854245U true CN202854245U (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220469260 Withdrawn - After Issue CN202854245U (en) | 2012-09-15 | 2012-09-15 | Temporary ground wire detection device for transformer substation |
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| CN (1) | CN202854245U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123375A (en) * | 2012-09-15 | 2013-05-29 | 华北电力大学（保定） | Temporary ground wire detection device for substation |
-
2012
- 2012-09-15 CN CN 201220469260 patent/CN202854245U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123375A (en) * | 2012-09-15 | 2013-05-29 | 华北电力大学（保定） | Temporary ground wire detection device for substation |
| CN103123375B (en) * | 2012-09-15 | 2015-07-08 | 华北电力大学（保定） | Temporary ground wire detection device for substation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130403 Effective date of abandoning: 20150708 |
|
| RGAV | Abandon patent right to avoid regrant |