CN203658509U - Cable grounding remote monitoring system - Google Patents
Cable grounding remote monitoring system Download PDFInfo
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- CN203658509U CN203658509U CN201320303269.8U CN201320303269U CN203658509U CN 203658509 U CN203658509 U CN 203658509U CN 201320303269 U CN201320303269 U CN 201320303269U CN 203658509 U CN203658509 U CN 203658509U
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Abstract
The utility model relates to the technical field of power monitoring system, and discloses a cable grounding remote monitoring system. The system is provided with a zero sequence current transformer which is fixed on a 0.4 kV to 35 kV field branch power distribution cable, and the zero sequence current transformer is connected with a radio transmitter through a small current neutral grounding detection circuit. The radio transmitter is connected with a radio reception controller through an antenna in a wireless manner. An output end of the radio reception controller is connected with an audible and visual alarm. The radio reception controller is connected with distribution network automation through a modem. The system can reduce check-up connection processing and grounding operation time for circuit administrators, reduces workload, relieves two-phase devices from being damaged by line voltage when grounding, improves device service life, and reduces resonance time of the current transformer, the transformer, and a ferromagnet. A most important point is to reduce life safety risks of live check-up connection personnel and personnel around a grounding point. The system is large in adaptable voltage range, low in cost, easy in implement and resource sharing, and distribution network automation level is improved.
Description
Technical field
The utility model relates to electric power monitoring system technical field, relates in particular to a kind of cable grounding Long-Range Surveillance System.
Background technology
At present, in generating plant, transformer substation switch station, 6kV, 10kV, 35kV, 66kV distribution line are the chief components of electric system.It is earth-free or through the mode of arc suppression coil, resistance eutral grounding that neutral point in the system of these electric pressures in transformer and generator has all adopted, and carries out power transmission and distribution.And on the bus of same electric pressure, there are again many output distribution circuits to be connected, and the present development need urbanization along with civilized society, community's growth requirement, also implement distribution ring network power supply for improving power supply reliability city, article one, on distribution line, there are again a lot of branches, set up by " radiation " is strong, and existing branch is mostly to underground cable future development, in this class distribution line, can there is phase fault, the phenomenon of the failure such as excess current and single-phase earthing, wherein the incidence of single-phase earthing is the most frequent, account for the more than 70% of system total failare rate, short trouble mostly also is single-phase earthing overlong time and causes, ungrounded phase voltage raises, heating, insulation breakdown, therefore developing heterogeneous ground connection causes.But from transformer station, switchyard, the generating plant of China, small current neutral grounding system or complex automatic system have all been installed in outlet.In circuit outgoing line cabinet, zero sequence current mutual inductor is installed, on distribution line, can have been found in time as long as there is ground connection.Now circuit is so long, branch is many, that ground connection occurs at which place, the managerial personnel of supply line are difficult to find out for the moment, charged line inspection danger coefficient is large, time is long, and the inspection that has a power failure causes larger power failure area, not only affects industrial and agricultural production, responsible consumer has a power failure, and also can cause larger loss and harmful effect also to affect power supply enterprise's economic benefit.
Summary of the invention
In order to solve distribution network cable branch cable fault ground, the charged line inspection time of power supply department line management personnel is long, and work efficiency reduces, affect staff or without reason personnel pass through the life security of cable fault access area.And the power failure line inspection causes delivery few, affect power supply reliability, business indicators benefit reduces, and the utility model provides a kind of cable grounding Long-Range Surveillance System.Can, in the time that cable has earth fault, by wireless communication technique, optical fiber communication technology, then show on fulgurite institute microcomputer by converter, the while also has advance notice letter to send, and solves the defect of above-mentioned existence, and promotes distribution automation level.
For realizing the object of foregoing invention, the utility model adopts following technical scheme:
A kind of cable grounding Long-Range Surveillance System, comprise: zero sequence current mutual inductor, small current neutral grounding testing circuit, transmitting set, radio reception controller, modulator-demodular unit, power supply, distribution automation, sun-generated electric power and ups power, the zero sequence current mutual inductor being fixed on 0.4KV-35kV field branch distribution cable is connected with transmitting set by small current neutral grounding testing circuit, transmitting set is by antenna and the wireless connections of radio reception controller, radio reception controller output end is connected with audible-visual annunciator, radio reception controller or be connected with distribution automation by modulator-demodular unit,
Wherein the power end of small current neutral grounding testing circuit, transmitting set is connected with sun-generated electric power; Wherein radio reception controller, modulator-demodular unit, distribution automation are connected with ups power.
A kind of cable grounding Long-Range Surveillance System, described audible-visual annunciator is made up of several audible-visual annunciators, each audible-visual annunciator is by triggering controllable silicon and sound light alarming circuit is electrically connected to form, the audible alarm circuit of sound light alarming circuit is connected and composed by triode and loudspeaker by ic chip 3, and the luminous alarm circuit of sound light alarming circuit is made up of LED.
A kind of cable grounding Long-Range Surveillance System, described sun-generated electric power is connected to form by photo-voltaic power supply GF, anti-reverse charging electric diode VD1, anti-reverse diode VD2, voltage detecting controller DYJCKZQ and relay T.
Owing to adopting said method: the utlity model has following superiority:
A kind of cable grounding Long-Range Surveillance System, there is applicable voltage range large, the following line-to-ground of branch cable, signal transmission time is short, can make line management person's line inspection process the shortening of ground connection working time, reduces workload, while alleviating ground connection, even two-phase equipment stands the harm of line voltage, improve service life of equipment, reduce current transformer, transformer, ferroresonance time, main is the risk that reduces charged line inspection personnel and near the personnel's life security of earth point.
It is low that this cable grounding Long-Range Surveillance System makes full use of radiotelegraphy cost, is convenient to implement, and electric system distribution line is disperseed, and searches the earth fault time long, looking up the fault point difficulty, and these problems are resolved, and have improved distribution automation level.
Sun-generated electric power and storage battery power supply for transmitting set power acquisition, dependable performance energy-conserving and environment-protective, the advantage such as maintenance is little, radio reception controller power source accesses UPS by charging and powers, and has improved the reliability of ground signalling transmission.
The utility model can be in the time of 10kV distribution branch cable and following line-to-ground, by ground connection information, upload to jurisdiction power supply station by radiotelegraphy, passes counties and districts' scheduling back again by modulator-demodular unit, optical transmitter and receiver, optical fiber, shows telemonitoring again by microcomputer.Utilize radiotelegraphy teletransmission near transformer station or fulgurite institute, by radio coding technology, show on fulgurite institute microcomputer by protocol converter again, while also has advance notice letter to send, and utilize LAN (Local Area Network) to counties and districts' tune, mediation distribution automation, duty room, make the resource sharing of cable grounding anticipating signal.
Accompanying drawing explanation
Fig. 1 is cable grounding Long-Range Surveillance System block scheme;
Fig. 2 is the transmitting set circuit diagram of Long-Range Surveillance System;
Fig. 3 is the radio reception controller circuitry figure of Long-Range Surveillance System;
Embodiment
As schemed: 1, 2, shown in 3, a kind of cable grounding Long-Range Surveillance System, comprise: zero sequence current mutual inductor, small current neutral grounding testing circuit, transmitting set, radio reception controller, modulator-demodular unit, power supply, distribution automation, sun-generated electric power and ups power, zero sequence current mutual inductor on the described 0.4kV-35kV of being fixed on field branch distribution cable is connected with transmitting set by small current neutral grounding testing circuit, transmitting set is by antenna and the wireless connections of radio reception controller, radio reception controller output end is connected with audible-visual annunciator, radio reception controller or be connected with distribution automation by modulator-demodular unit,
Wherein the power end of small current neutral grounding testing circuit, transmitting set is connected with sun-generated electric power; Wherein radio reception controller, modulator-demodular unit, distribution automation are connected with ups power.
Described audible-visual annunciator is made up of several audible-visual annunciators, each audible-visual annunciator is by triggering controllable silicon and sound light alarming circuit is electrically connected to form, the audible alarm circuit of sound light alarming circuit is connected and composed by triode and loudspeaker by ic chip 3, and the luminous alarm circuit of sound light alarming circuit is made up of LED.
Described sun-generated electric power is connected to form by photo-voltaic power supply GF, anti-reverse charging electric diode VD1, anti-reverse diode VD2, voltage detecting controller DYJCKZQ and relay T.
1, on Mei road 0.4kV-35kV field branch distribution cable, zero sequence current mutual inductor is installed, in the time of the following circuit generation of branch circuit earth fault, sun-generated electric power and storage battery power supply for transmitting set power acquisition;
2, every road wireless launcher has earth fault line information, is transferred to the radio reception controller of fulgurite institute duty room by radio transmission mode;
3, radio reception controller has the earth fault line information of sending receiving Mei road wireless launcher, sends light warning by audible-visual annunciator; Or transfer to the automation control system of distribution by modulator-demodular unit, realize the telemonitoring of cable earth fault line information.
Described radio reception controller has simultaneously the earth fault information that receives, monitors that many different distribution line wireless launchers of electric pressure send, and radio reception controller power source adopts the UPS power supply of charging, and the Emergency use while power failure is provided.
Principle of work: power cable passes in the middle of zero sequence current mutual inductor, zero sequence current mutual inductor secondary passes through again transmitting set by small current neutral grounding testing circuit XDLJDJC, ground signalling is sent, by radio reception controller, indicate earth fault cable line and equipment by audible-visual annunciator again.Can also automatically network by modulator-demodular unit TZJTQ and the distribution of duty room.
Transmitting set is connected with sun-generated electric power; VD1 is anti-reverse charging electric diode; VD2 is anti-reverse diode; T1 is the gauge tap of relay, and BX is fuse, and switch T1 is connected in parallel on the output terminal of solar cell; voltage detecting controller DYJCKZQ is electrically connected with the photo-voltaic power supply GF of sun power by relay T; the gauge tap T1 conducting of relay, bypass, plays additives for overcharge protection.
In the time that overcast and rainy night, solar cell output voltage was less than accumulator, VD1 cut-off, guarantees overcast and rainy night, and accumulator is not to solar cell reverse charge.
VD2 is anti-reverse diode, and when the reverse polarity connection of electricity storage preventing pond, VD2 conducting makes accumulator pass through VD2 short circuit dischange, produces very large electric current fast by fuse BX fusing, finds in time to process once installation personnel.Detecting control short circuit detects battery tension at any time.
Claims (3)
1. a cable grounding Long-Range Surveillance System, it is characterized in that: comprising: zero sequence current mutual inductor, small current neutral grounding testing circuit, transmitting set, radio reception controller, modulator-demodular unit, power supply, distribution automation, sun-generated electric power and ups power, the zero sequence current mutual inductor being fixed on 0.4kV-35kV field branch distribution cable is connected with transmitting set by small current neutral grounding testing circuit, transmitting set is by antenna and the wireless connections of radio reception controller, radio reception controller output end is connected with audible-visual annunciator, radio reception controller or be connected with distribution automation by modulator-demodular unit,
Wherein the power end of small current neutral grounding testing circuit, transmitting set is connected with sun-generated electric power; Wherein radio reception controller, modulator-demodular unit, distribution automation are connected with ups power.
2. a kind of cable grounding Long-Range Surveillance System according to claim 1, it is characterized in that: described audible-visual annunciator is made up of several audible-visual annunciators, each audible-visual annunciator is by triggering controllable silicon and sound light alarming circuit is electrically connected to form, the audible alarm circuit of sound light alarming circuit is connected and composed by triode and loudspeaker by ic chip 3, and the luminous alarm circuit of sound light alarming circuit is made up of LED.
3. a kind of cable grounding Long-Range Surveillance System according to claim 1, is characterized in that: described sun-generated electric power is connected to form by photo-voltaic power supply GF, anti-reverse charging electric diode VD1, anti-reverse diode VD2, voltage detecting controller DYJCKZQ and relay T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320303269.8U CN203658509U (en) | 2013-05-30 | 2013-05-30 | Cable grounding remote monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320303269.8U CN203658509U (en) | 2013-05-30 | 2013-05-30 | Cable grounding remote monitoring system |
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| CN203658509U true CN203658509U (en) | 2014-06-18 |
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| CN201320303269.8U Expired - Fee Related CN203658509U (en) | 2013-05-30 | 2013-05-30 | Cable grounding remote monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278733A (en) * | 2013-05-30 | 2013-09-04 | 孟津县电业公司 | Cable ground connection remote monitoring method and remote monitoring system |
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2013
- 2013-05-30 CN CN201320303269.8U patent/CN203658509U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278733A (en) * | 2013-05-30 | 2013-09-04 | 孟津县电业公司 | Cable ground connection remote monitoring method and remote monitoring system |
| CN103278733B (en) * | 2013-05-30 | 2016-08-10 | 国家电网公司 | A kind of cable grounding remote monitoring method and Long-Range Surveillance System |
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