CN202886525U - Electric power line failure monitoring terminal - Google Patents
Electric power line failure monitoring terminal Download PDFInfo
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- CN202886525U CN202886525U CN 201220483975 CN201220483975U CN202886525U CN 202886525 U CN202886525 U CN 202886525U CN 201220483975 CN201220483975 CN 201220483975 CN 201220483975 U CN201220483975 U CN 201220483975U CN 202886525 U CN202886525 U CN 202886525U
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- Locating Faults (AREA)
Abstract
The utility model relates to a monitoring terminal, especially relates to an electric power line failure monitoring terminal comprising a host device and three slave devices respectively connected with a three phase AC circuit. The three slave devices comprise a short distance wireless transmission circuit a, and the host device comprises a short distance wireless transmission circuit b cooperated with the short distance wireless transmission circuit a. In the utility model, the host device can be used to send time identifications by the short distance wireless transmission circuit b, and each phase of the slave devices starts the acquisition after receiving the time identifications, and a first CPU can be used for the calculation of parameters such as angles, frequencies, currents, and harmonic waves after the acquisition of three cycles. Because the sampling of the three phases is synchronous, the initial sampling angle quadrant sum of the three slave devices is zero. The data can be sent to the host device by the short distance wireless transmission circuit a, and the host device can be used for the recovery and the comparison of the corresponding data, then the working state of the monitoring point can be calculated, and the accuracy of determining the grounding failure can be greatly improved.
Description
Technical field
The utility model relates to a kind of monitoring terminal, relates in particular to a kind of electric power route malfunction monitoring terminal.
Background technology
Account for more than 80 % of electric system overall failure at 6-35KV hi-line network singlephase earth fault according to investigations, and short trouble is much also formed by the singlephase earth fault development; Therefore carried out a large amount of research for the domestic many scholars of the one-phase ground protection of small current neutral grounding system, proposed multiple earth fault line selection principle: zero-sequence current principle, first half-wave principle, harmonic wave principle, signal are annotated people's principle etc.Realize relatively difficulty at 6-35KV hi-line network in these principles and the method; The online fault detector of power circuit is only monitored single-phase parameters of electric power at present, independently single-phase measurement parameter is analyzed, indication line short fault and earth fault, because the field conditions of earth fault is comparatively complicated, the differentiation earth fault that the single-phase capacity current of simple monitoring changes and the single-phase voltage variation can not 100%, judging nicety rate is the highest about 50%.
Summary of the invention
In order to address the above problem, the utility model provides a kind of electric power route malfunction monitoring terminal that can improve the earth fault accuracy rate.
To achieve these goals, the utility model is mainly solved by the following technical programs: a kind of electric power route malfunction monitoring terminal, comprise main frame and three slaves that link to each other with three-phase circuit respectively, described slave comprises the first power supply and charge-discharge circuit and a CPU, the signal input part of the one CPU is connected with the A/D modular circuit, the A/D modular circuit is connected with mutual inductor, a described CPU is connected with short range wireless transmission circuit a, and described the first power supply and charge-discharge circuit are connected with short range wireless transmission circuit a with a CPU respectively provides power supply; Also be connected with whether charged capacitor charge and discharge circuit of monitoring three-phase circuit on the described CPU; Described main frame comprises second source and charge-discharge circuit and the 2nd CPU, the 2nd CPU is connected with the short range wireless transmission circuit b that is complementary with described short range wireless transmission circuit a, the signal output part of the 2nd CPU links to each other with data center, and described second source and charge-discharge circuit are connected with short range wireless transmission circuit b with the 2nd CPU respectively provides power supply.
As preferably, the signal output part of the 2nd above-mentioned CPU is provided with GPRS/CDMA remote wireless transmission circuit and links to each other with described data center.
As preferably, above-mentioned second source and charge-discharge circuit are connected with GPRS/CDMA remote wireless transmission circuit provides power supply.
The utility model main frame is by short range wireless transmission circuit b transmitting time sign, and every phase slave time of receipt (T of R) sign begins to gather, and has a CPU to calculate behind three cycles of continuous acquisition, calculates the parameters such as angle, frequency, electric current, harmonic wave; Because the three-phase sampling time is synchronous, the angle quadrants of three initial samplings of slave and be zero; By short range wireless transmission circuit a data are sent to main frame again, main frame is repaired contrast to corresponding data again, adopt zero-sequence current principle, first half-wave principle, that the harmonic wave principle is calculated this monitoring point is in running order, can greatly improve the accuracy rate of differentiating earth fault.
Description of drawings
Fig. 1 is the composition frame chart of the utility model embodiment.
Fig. 2 is the theory diagram of the utility model slave.
Fig. 3 is the theory diagram of the utility model main frame.
Embodiment
Below in conjunction with accompanying drawing 1-3, the embodiment of the technical solution of the utility model is described in further detail.
Embodiment: a kind of electric power route malfunction monitoring terminal, comprise main frame 1 and three slaves 2 that link to each other with three-phase circuit (A phase, B phase, C phase among Fig. 1) respectively, described slave 2 comprises the first power supply and charge-discharge circuit 3 and a CPU4, the signal input part of the one CPU4 is connected with A/D modular circuit 5, A/D modular circuit 5 is connected with mutual inductor 6, A/D modular circuit 5 becomes digital signal with current conversion, gives a CPU4, and a CPU4 adopts Fourier series to calculate digital signal; Obtain this moment current effective value (current effective value:
Wherein M is sampling number)
The signal output part of the one CPU4 is connected with short range wireless transmission circuit a7.The first power supply and charge-discharge circuit 3 are connected with short range wireless transmission circuit a7 with a CPU4 respectively provides power supply.
Also be connected with whether charged capacitor charge and discharge circuit 8 of monitoring three-phase circuit on the one CPU4;
Main frame comprises second source and charge-discharge circuit 12 and the 2nd CPU9, and the signal input part of the 2nd CPU9 is provided with the short range wireless transmission circuit b10 that is complementary with described short range wireless transmission circuit a7, and the signal output part of the 2nd CPU9 links to each other with data center.The signal output part of the 2nd CPU9 is provided with GPRS/CDMA remote wireless transmission circuit 11 and links to each other with described data center.Second source and charge-discharge circuit 12 link to each other with GPRS/CDMA remote wireless transmission circuit 11 with the 2nd CPU9, short range wireless transmission circuit b10 respectively provides power supply.
Main frame 1 is by short-distance wireless transmission circuit b10 transmitting time sign, and every 2 times of receipt (T of R) of phase slave sign begins to gather, and calculates behind three cycles of continuous acquisition, calculates the parameters such as angle, frequency, electric current, harmonic wave; Because time synchronized; Theoretical according to the three-phase alternating current electromotive force, three-phase alternating current electric vector and be zero, and since the time synchronized that time three slaves 2 are sampled, can do like this three-phase synchronous sampling reaches the angle quadrant and is zero; By short range wireless transmission circuit a7 data are sent to main frame 1 again, receive signal by the short range wireless transmission circuit b10 on the main frame 1, main frame 1 is repaired contrast to corresponding data again, adopt zero-sequence current principle, first half-wave principle, harmonic wave principle etc. to calculate this place, monitoring point duty, can greatly improve the accuracy rate of differentiating earth fault.This monitoring point is by GPRS/CDMA remote wireless transmission circuit 11 simultaneously, regularly or in real time will duty teletransmission this moment to data center, and be furnished with original sampled data, can reflect the parameters such as real-time current, frequency of circuit.Occur to start immediately telecommunication in fault, fault state is in time fed back to data center, by comprehensive each data of monitoring point in center, analyze concrete trouble spot, the trouble spot sent to maintenance personal's mobile phone after software will be analyzed again, had reached timely notice maintenance.
Claims (3)
1. electric power route malfunction monitoring terminal, it is characterized in that comprising main frame (1) and three slaves (2) that link to each other with three-phase circuit respectively, described slave (2) comprises the first power supply and charge-discharge circuit (3) and a CPU(4), the one CPU(4) signal input part is connected with A/D modular circuit (5), A/D modular circuit (5) is connected with mutual inductor (6), a described CPU(4) be connected with short range wireless transmission circuit a(7), described the first power supply and charge-discharge circuit (3) respectively with a CPU(4) be connected to be connected with short range wireless transmission circuit a(7 power supply be provided; A described CPU(4) also is connected with whether charged capacitor charge and discharge circuit (8) of monitoring three-phase circuit on; Described main frame (1) comprises second source and charge-discharge circuit (12) and the 2nd CPU(9), the 2nd CPU(9) be connected with and described short range wireless transmission circuit a(7) the short range wireless transmission circuit b(10 that is complementary), the 2nd CPU(9) signal output part links to each other with data center, described second source and charge-discharge circuit (12) respectively with the 2nd CPU(9) be connected to be connected with short range wireless transmission circuit b(10 power supply be provided.
2. a kind of electric power route malfunction monitoring terminal according to claim 1 is characterized in that described the 2nd CPU(9) signal output part be provided with GPRS/CDMA remote wireless transmission circuit (11) and link to each other with described data center.
3. a kind of electric power route malfunction monitoring terminal according to claim 2 is characterized in that described second source and charge-discharge circuit (12) are connected with GPRS/CDMA remote wireless transmission circuit (11) provides power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220483975 CN202886525U (en) | 2012-09-21 | 2012-09-21 | Electric power line failure monitoring terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220483975 CN202886525U (en) | 2012-09-21 | 2012-09-21 | Electric power line failure monitoring terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886525U true CN202886525U (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220483975 Expired - Fee Related CN202886525U (en) | 2012-09-21 | 2012-09-21 | Electric power line failure monitoring terminal |
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| Country | Link |
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| CN (1) | CN202886525U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677933A (en) * | 2017-11-21 | 2018-02-09 | 桂林师范高等专科学校 | Detecting fault line for un-ground neutral power system |
| CN108802490A (en) * | 2018-06-25 | 2018-11-13 | 中国石油大学(华东) | A kind of plesiochronous startup of harmonic wave on-line monitoring terminal under the conditions of no clock synchronization and synchronization data obtaining method |
-
2012
- 2012-09-21 CN CN 201220483975 patent/CN202886525U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677933A (en) * | 2017-11-21 | 2018-02-09 | 桂林师范高等专科学校 | Detecting fault line for un-ground neutral power system |
| CN108802490A (en) * | 2018-06-25 | 2018-11-13 | 中国石油大学(华东) | A kind of plesiochronous startup of harmonic wave on-line monitoring terminal under the conditions of no clock synchronization and synchronization data obtaining method |
| CN108802490B (en) * | 2018-06-25 | 2020-08-28 | 中国石油大学(华东) | Quasi-synchronous starting and synchronous data acquisition method for harmonic on-line monitoring terminal under time-alignment-free condition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160623 Address after: 325604 Xinguang Industrial Zone, Yueqing, Zhejiang, Wenzhou, Liushi Patentee after: Gulifa Group Co., Ltd. Address before: Weng Yang Zhen Huaxing Road Yueqing 325606 Zhejiang province Wenzhou City, No. 30 Patentee before: Zhejiang Yong Neng Electric Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20160921 |