CN201993879U - Wireless fault alarm of digital cables - Google Patents
Wireless fault alarm of digital cables Download PDFInfo
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- CN201993879U CN201993879U CN201120013439XU CN201120013439U CN201993879U CN 201993879 U CN201993879 U CN 201993879U CN 201120013439X U CN201120013439X U CN 201120013439XU CN 201120013439 U CN201120013439 U CN 201120013439U CN 201993879 U CN201993879 U CN 201993879U
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Abstract
The utility model relates to a wireless fault alarm of digital cables, which is characterized by comprising a wireless digital ground sensor, wireless digital short-circuit sensors and a data processing mainframe, wherein the wireless digital ground sensor monitoring ground fault of circuits is arranged on a power supplying cable in an electric power system, the wireless digital short-circuit sensors monitoring short circuit fault of circuits are arranged on branch cables with different phases of the power supplying cable, and the wireless digital ground sensor and the wireless digital short-circuit sensors are communicated with the data processing mainframe in a wireless mode. Compared with the prior art, the wireless fault alarm of the digital cables has the advantages of low power consumption, simple circuit structure, integrally modular design, high integration level, lower cost, convenience in mounting, and has higher engineering practicality and market popularizing value.
Description
Technical field
The utility model relates to high-tension line fault detection technique field, particularly a kind of wireless digital cable fault alarm.
Background technology
In electric system, various faults can appear in controller switching equipment, especially common with short circuit, earth fault, short circuit, earth fault are in case take place, can cause large-area power-cuts, economic loss is difficult to estimate, so the utmost point needs a kind of equipment of quick investigation fault, guarantees the fast quick-recovery stable operation of electric system.
Summary of the invention
The purpose of this utility model provides a kind of wireless digital cable fault alarm, overcome the deficiencies in the prior art, energy is the electric current and the temperature of Monitoring High Voltage Cable in real time, and accurate detection line is short-circuited, the trouble spot of ground connection, and utilizes wireless mode to carry out information communication.
For solving the problems of the technologies described above, the technical solution of the utility model is made up of three main devices:
Wireless digital cable fault alarm, it is characterized in that, comprise wireless digital grounding sensor, wireless digital short-circuit sensor, data processing main frame, the wireless digital grounding sensor of Monitoring Line earth fault is arranged in the electric system on the service cable, the wireless digital short-circuit sensor of Monitoring Line short trouble is arranged on each phase branch cable of service cable, and wireless digital grounding sensor and wireless digital short-circuit sensor utilize wireless mode and data processing main frame to carry out real-time communication.
Described wireless digital short-circuit sensor comprises detecting unit, arithmetic element, radio frequency unit, and arithmetic element is connected with radio frequency unit with detecting unit respectively; Described arithmetic element comprises single-chip microcomputer, watchdog circuit, clock circuit, RS485 interface circuit, single-chip microcomputer is connected with watchdog circuit, clock circuit, RS485 interface circuit respectively, described detecting unit comprises thermal resistance temperature surveying circuit, current transformer metering circuit, schmidt shaping circuit, schmidt shaping circuit is connected with thermal resistance temperature surveying circuit summation current transformer metering circuit respectively, described radio frequency unit kernel is the RFIC chip, and the RFIC chip is connected with peripheral antenna.
Described wireless digital grounding sensor comprises detecting unit, arithmetic element, radio frequency unit, and arithmetic element is connected with radio frequency unit with detecting unit respectively; Described arithmetic element comprises low-power consumption MCU, watchdog circuit, clock circuit, RS485 communication interface, low-power consumption MCU is connected with watchdog circuit, clock circuit, RS485 communication interface respectively, described detecting unit comprises thermal resistance temperature surveying circuit, current transformer metering circuit, schmidt shaping circuit, schmidt shaping circuit is connected with thermal resistance temperature surveying circuit summation current transformer metering circuit respectively, described radio frequency unit kernel is the RFIC chip, and the RFIC chip is connected with peripheral antenna.
Described data processing main frame, comprise low-power consumption MCU, LCD display, storer, watchdog circuit, clock circuit, buzz circuit, output interface circuit, input interface circuit, low-power consumption MCU is connected with LCD display, storer, watchdog circuit, clock circuit, buzz circuit, output interface circuit respectively; Described input interface circuit is connected with low-power consumption MCU by photoelectric isolating circuit, and described output interface circuit is connected with the RS485 lead-out terminal with relay output end respectively, and described input interface circuit is connected with RS232, RS485, the multiplexing terminal of TTL.
Compared with prior art, the beneficial effects of the utility model are: equipment low-power consumption, circuit structure are simple, the complete machine modular design, and the integrated level height, cost is relatively inexpensive, easy for installation, has very strong engineering practicability and market popularization value.
Description of drawings
Fig. 1 is the utility model example structure synoptic diagram;
Fig. 2 is a wireless digital short-circuit sensor structural representation;
Fig. 3 is that short trouble is judged synoptic diagram;
Fig. 4 is a wireless digital grounding sensor structural representation;
Fig. 5, Fig. 6 are that earth fault is judged synoptic diagram;
Fig. 7 is a data processing main machine structure synoptic diagram.
Among the figure: 1-wireless digital short-circuit sensor 2-wireless digital grounding sensor 3-data processing main frame 4-ground wire 5-bus cable 6-branch cable
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
See Fig. 1, wireless digital cable fault alarm example structure synoptic diagram described in the utility model, comprise wireless digital grounding sensor 2, wireless digital short-circuit sensor 1, data processing main frame 3, the wireless digital grounding sensor 2 of Monitoring Line earth fault is arranged in the electric system on the bus cable 5, ground wire is worn for 4 times, data processing main frame 3 is installed in non-high-pressure side, the wireless digital short-circuit sensor 1 of Monitoring Line short trouble is arranged on each phase branch cable 6 of service cable, wireless digital grounding sensor 2 and wireless digital short-circuit sensor 1 utilize wireless mode and data processing main frame 3 to carry out real-time communication, data processing main frame 3 shows the electric current and the temperature of branch cable 6 and bus cable 5 in real time, and the pattern with photoelectricity when fault takes place is made indicating fault.
See Fig. 2, wireless digital short-circuit sensor example structure synoptic diagram described in the utility model comprises detecting unit, arithmetic element, radio frequency unit, and arithmetic element is connected with radio frequency unit with detecting unit respectively; Described arithmetic element comprises single-chip microcomputer, watchdog circuit, clock circuit, RS485 interface circuit, and single-chip microcomputer is connected with watchdog circuit, clock circuit, RS485 interface circuit respectively.Described detecting unit comprises thermal resistance temperature surveying circuit, current transformer metering circuit, schmidt shaping circuit, thermal resistance converts temperature value to electric current, current transformer is obtained current signal in the cable by induction, schmidt shaping circuit is connected with thermal resistance temperature surveying circuit summation current transformer metering circuit respectively, schmidt shaping circuit offers the single-chip microcomputer analysis with the current signal shaping.Described radio frequency unit kernel is the RFIC chip, and frequency is at 3MHz-10000MHz, and the RFIC chip is connected with peripheral antenna, and data are launched with wireless mode.
In the use, with current transformer with the coil pattern on the single-phase branch cable of A, the B of cable, C three-phase, the thermal resistance surface closely contacts with single-phase branch cable surface, the temperature of cable and current signal are in mode regularly, utilize wireless method to emit, the short trouble signal then adopts and interrupts instant mode, utilizes wireless mode to emit.
Fig. 3 is the decision principle synoptic diagram of the short road of wireless digital described in the utility model fault-signal.When the electric current generation forward mutation assay in the circuit, after the sudden change value reached certain value in the Δ t time, supply line had the protectiveness action that has a power failure to take place, i.e. the wired road of the decidable fault that is short-circuited
See Fig. 4, wireless digital grounding sensor example structure synoptic diagram described in the utility model comprises detecting unit, arithmetic element, radio frequency unit, and arithmetic element is connected with radio frequency unit with detecting unit respectively; Described arithmetic element comprises low-power consumption MCU, watchdog circuit, clock circuit, RS485 communication interface, and low-power consumption MCU is connected with watchdog circuit, clock circuit, RS485 communication interface respectively.Described detecting unit comprises thermal resistance temperature surveying circuit, current transformer metering circuit, schmidt shaping circuit, thermal resistance converts temperature value to electric current, current transformer is obtained current signal in the cable by induction, schmidt shaping circuit is connected with thermal resistance temperature surveying circuit summation current transformer metering circuit respectively, schmidt shaping circuit offers the single-chip microcomputer analysis with the current signal shaping.Described radio frequency unit kernel is the RFIC chip, and frequency is at 3MHz-10000MHz, and the RFIC chip is connected with peripheral antenna, and data are launched with wireless mode.
In the use, with current transformer with the coil pattern on the bus cable of cable, the thermal resistance surface closely contacts with single-phase branch cable surface, the temperature of cable and current signal are in mode regularly, utilize wireless method to emit, the earth fault signal then adopts and interrupts instant mode, utilizes wireless mode to emit.
Fig. 5, Fig. 6, it is the decision principle synoptic diagram of the utility model fault-signal, as shown in the figure, curve is electric current and the voltage curve after adjusting among the figure, according to the sudden change value of setting in the single-chip microcomputer sheet in advance, in the time of Δ t, detect current break Δ I value, and this moment, voltage Δ V is in the Δ t time, drop-out value＞1/3 o'clock can decision circuit generation earth fault.
See Fig. 7, data processing host implementation example structural representation described in the utility model, comprise low-power consumption MCU, LCD display, storer, watchdog circuit, clock circuit, buzz circuit, low-power consumption MCU is connected with LCD display, storer, watchdog circuit, clock circuit, buzz circuit respectively; Described low-power consumption MCU also is connected with RS232, RS485, the multiplexing terminal of TTL by photoelectric isolating circuit one, is fit to the input of various ways signal; Described low-power consumption MCU also is connected with the RS485 lead-out terminal with relay output end respectively by photoelectric isolating circuit two, sets up external communication.The LCD display model is LCD12864, is used to show the data of reception.
When alerting signal was imported into, low-power consumption MCU sent demonstration according to the content of reservoir designs after carrying out inner digital-to-analogue processing, simultaneously, drives LCD display and hummer, also drove output relay and output RS485 bus.
The utility model also is provided with the filtering voltage regulation power supply, and design has anti-thunder tube and voltage dependent resistor (VDR), power supply to export three tunnel+5V and ground GND on the circuit, mutual electrical isolation between each road output of power supply.
The utility model uses in high-tension distributing line, when the 10KV high-tension cable when earth fault takes place, accurate fault location point, and according to judgment basis, reduce misoperation, improve the operation stability of power-supply unit, satisfy the requirement that power system security is produced, the utility model goes in the different power supply grade circuits after revising inner parameter.
Claims (4)
1. wireless digital cable fault alarm, it is characterized in that, comprise wireless digital grounding sensor, wireless digital short-circuit sensor, data processing main frame, the wireless digital grounding sensor of Monitoring Line earth fault is arranged on the service cable in the electric system, the wireless digital short-circuit sensor of Monitoring Line short trouble is arranged on each phase branch cable of service cable, and wireless digital grounding sensor and wireless digital short-circuit sensor utilize wireless mode and data processing main frame to carry out real-time communication.
2. wireless digital cable fault alarm according to claim 1 is characterized in that described wireless digital short-circuit sensor comprises detecting unit, arithmetic element, radio frequency unit, and arithmetic element is connected with radio frequency unit with detecting unit respectively; Described arithmetic element comprises single-chip microcomputer, watchdog circuit, clock circuit, RS485 interface circuit, single-chip microcomputer is connected with watchdog circuit, clock circuit, RS485 interface circuit respectively, described detecting unit comprises thermal resistance temperature surveying circuit, current transformer metering circuit, schmidt shaping circuit, schmidt shaping circuit is connected with thermal resistance temperature surveying circuit summation current transformer metering circuit respectively, described radio frequency unit kernel is the RFIC chip, and the RFIC chip is connected with peripheral antenna.
3. wireless digital cable fault alarm according to claim 1 is characterized in that described wireless digital grounding sensor comprises detecting unit, arithmetic element, radio frequency unit, and arithmetic element is connected with radio frequency unit with detecting unit respectively; Described arithmetic element comprises low-power consumption MCU, watchdog circuit, clock circuit, RS485 communication interface, low-power consumption MCU is connected with watchdog circuit, clock circuit, RS485 communication interface respectively, described detecting unit comprises thermal resistance temperature surveying circuit, current transformer metering circuit, schmidt shaping circuit, schmidt shaping circuit is connected with thermal resistance temperature surveying circuit summation current transformer metering circuit respectively, described radio frequency unit kernel is the RFIC chip, and the RFIC chip is connected with peripheral antenna.
4. wireless digital cable fault alarm according to claim 1, it is characterized in that, described data processing main frame, comprise low-power consumption MCU, LCD display, storer, watchdog circuit, clock circuit, buzz circuit, output interface circuit, input interface circuit, low-power consumption MCU is connected with LCD display, storer, watchdog circuit, clock circuit, buzz circuit, output interface circuit respectively; Described input interface circuit is connected with low-power consumption MCU by photoelectric isolating circuit, and described output interface circuit is connected with the RS485 lead-out terminal with relay output end respectively, and described input interface circuit is connected with RS232, RS485, the multiplexing terminal of TTL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120013439XU CN201993879U (en) | 2011-01-17 | 2011-01-17 | Wireless fault alarm of digital cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120013439XU CN201993879U (en) | 2011-01-17 | 2011-01-17 | Wireless fault alarm of digital cables |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201993879U true CN201993879U (en) | 2011-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120013439XU Expired - Lifetime CN201993879U (en) | 2011-01-17 | 2011-01-17 | Wireless fault alarm of digital cables |
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| CN (1) | CN201993879U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267922A (en) * | 2013-05-15 | 2013-08-28 | 国家电网公司 | Intelligent cable short circuit grounding and temperature fault indicator |
| CN104931846A (en) * | 2015-07-02 | 2015-09-23 | 国网山东省电力公司潍坊供电公司 | Low-voltage current wireless checking instrument |
| CN106843065A (en) * | 2017-03-09 | 2017-06-13 | 武汉随戈科技服务有限公司 | One kind is based on Controlled by micro computer portable electronic circuit automatic trouble locating arrangement |
-
2011
- 2011-01-17 CN CN201120013439XU patent/CN201993879U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267922A (en) * | 2013-05-15 | 2013-08-28 | 国家电网公司 | Intelligent cable short circuit grounding and temperature fault indicator |
| CN104931846A (en) * | 2015-07-02 | 2015-09-23 | 国网山东省电力公司潍坊供电公司 | Low-voltage current wireless checking instrument |
| CN106843065A (en) * | 2017-03-09 | 2017-06-13 | 武汉随戈科技服务有限公司 | One kind is based on Controlled by micro computer portable electronic circuit automatic trouble locating arrangement |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110928 |
|
| CX01 | Expiry of patent term |