CN207426718U - The monitoring sensing of cable circulation takes power supply module - Google Patents
The monitoring sensing of cable circulation takes power supply module Download PDFInfo
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- CN207426718U CN207426718U CN201721528799.7U CN201721528799U CN207426718U CN 207426718 U CN207426718 U CN 207426718U CN 201721528799 U CN201721528799 U CN 201721528799U CN 207426718 U CN207426718 U CN 207426718U
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- supply module
- monitoring sensing
- takes power
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 16
- 239000010703 silicon Substances 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims abstract description 10
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000035484 reaction time Effects 0.000 abstract description 3
- 239000002184 metal Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The monitoring sensing of cable circulation takes power supply module, belongs to electric device maintenance field, is related specifically to a kind of cable monitoring sensing and takes power supply module.Including CT electricity getting devices, further include lightning protection circuit, accumulator and voltage-stabilizing output circuit, it is characterised in that：Further include silicon-controlled overvoltage crowbar, energy circuit, aerial drainage control circuit are let out in rectification.Silicon-controlled overvoltage crowbar can avoid because high current protection circuit ratio let out can the circuit reaction time it is fast, letting out can circuit failure or slow in reacting.Rectification lets out energy circuit rectifies circuit and lets out energy circuit and be combined with each other, and an existing rectified action of circuit structure is made to let out and can act on again, circuit has been simplified, has added reliability.Aerial drainage control circuit can ensure to take safe operation in electric CT primary current possible range.
Description
Technical field
The utility model belongs to electric device maintenance field, is related specifically to a kind of cable monitoring sensing and takes power supply module
Background technology
With the increase of power cable quantity and run time, the problem of high-tension cable metallic shield grounding current anomaly day
Benefit is prominent, has influenced the safe and reliable operation of cable run.
High-tension cable will generate induced electricity from electromagnetic principles since its structure is using single structure on metal sheath
Pressure, when metal sheath forms access with the earth, the earth current generated on metal sheath is likely to be breached higher numerical value, draws
Sheath fever is played, reduces the current-carrying capacity of cable operation.Metal sheath overheat also results in cable insulation aging, to the safety of cable
Operation constitutes a threat to.At present metal sheath voltage is reduced frequently with three sections of conversion methods both at home and abroad.But in actual engineering practice
In, circuit need not replace compared with stub cable sheath sometimes, nor can guarantee that the system of laying of cable is symmetrically to lay, and is caused
Sometimes metal sheath circulation can not be completely eliminated by replacing.
At present, domestic many Research Centers monitoring and analysis of the manufacturer to cable grounding electric current in one's power, has carried out deeply
Research.But it has the following problems：1. monitoring device in-site installation and wiring are complicated, construction and plant maintenance are difficult, and engineering should
With there are larger gaps；2. the particularity of cable run running environment, suitable for the key technology of the power supply of cable run
Do not solve；3. the data transmission key technical problem of cable run complexity running environment.
Therefore, there is an urgent need for a kind of new means in the prior art to solve the above problems.
The content of the invention
Problem to be solved by this invention is：A kind of cable circulation monitoring sensing is provided and takes power supply module, it can be in quilt
It surveys on ground wire and electricity is taken using current transformer sensing, additionally it is possible to by processing of circuit be powered equipment.
The monitoring sensing of cable circulation takes power supply module, including CT electricity getting devices, further includes lightning protection circuit, energy storage electricity
Road and voltage-stabilizing output circuit, it is characterised in that：Further include silicon-controlled overvoltage crowbar, energy circuit is let out in rectification, aerial drainage control electricity
Road.
The silicon-controlled overvoltage crowbar includes a bidirectional triode thyristor, two zener diodes and a filtered electrical
Hold.
Energy circuit is let out in the rectification includes two isolated gate FETs and four diodes.
The aerial drainage control circuit includes hysteresis loop comparator, resistance, PNP type triode and NPN type triode.
By above-mentioned designing scheme, the utility model can bring following advantageous effect：Silicon-controlled overvoltage crowbar energy
Enough avoid because high current protection circuit ratio let out can the circuit reaction time it is fast, letting out can circuit failure or slow in reacting.It is whole
It flows energy circuit rectifies circuit and lets out energy circuit and be combined with each other, an existing rectified action of circuit structure is made to let out and can act on again,
Circuit has been simplified, has added reliability.Aerial drainage control circuit, which can ensure to take in electric CT primary current possible range, transports safely
Row.
Description of the drawings
The utility model is further described below in conjunction with the drawings and specific embodiments：
Fig. 1 is the structure diagram that the monitoring sensing of the utility model cable circulation takes power supply module.
Fig. 2 is that the monitoring sensing of the utility model cable circulation takes the silicon-controlled overvoltage protection in power supply module embodiment electric
Road schematic diagram.
Fig. 3 takes the rectification in power supply module embodiment to let out for the monitoring sensing of the utility model cable circulation can circuit signal
Figure.
Fig. 4 takes the aerial drainage control circuit in power supply module embodiment to illustrate for the monitoring sensing of the utility model cable circulation
Figure.
Wherein, 1-CT electricity getting devices, 2- lightning protection circuits, the silicon-controlled overvoltage crowbars of 3-, 4- rectifications let out can circuit,
5- aerial drainages control circuit, 6- filtering accumulator, 7- voltage-stabilizing output circuits.
Specific embodiment
As shown in Figure 1, the monitoring sensing of cable circulation takes power supply module, including CT electricity getting devices 1, lightning protection is further included
Circuit 2, accumulator 6 and voltage-stabilizing output circuit 7, it is characterised in that：Further include silicon-controlled overvoltage crowbar 3, energy is let out in rectification
Circuit 4, aerial drainage control circuit 5.
The silicon-controlled overvoltage crowbar 3 includes a bidirectional triode thyristor, two zener diodes and a filtered electrical
Hold.
Energy circuit 4 is let out in the rectification includes two isolated gate FETs and four diodes.
The aerial drainage control circuit 5 includes hysteresis loop comparator, resistance, PNP type triode and NPN type triode.
Embodiment：
Silicon-controlled overvoltage crowbar as shown in Fig. 2, high current protection circuit ratio let out can the circuit reaction time it is fast, for
When primary side current is larger, letting out can circuit failure or slow in reacting, it is necessary to which high current protection circuit carries out energy release.Its
Operation principle is when both end voltage added by T1 sets voltage higher than zener diode, and zener diode conducting triggering is two-way controllable
Silicon turns on, and electric current flows away from bidirectional triode thyristor after conducting, until voltage reversal bidirectional triode thyristor just turns off.Through-current capability must be
Secondary side highest short circuit current flow divided by the turn ratio, it is pressure-resistant for CT secondary sides ceiling voltage and to stay there are one nargin.Since D1 and D2 are
Zener diode is a slow device, and junction capacity is very big, and reverse recovery time is very long, when silicon-controlled both end voltage is from zero
During rapid variation, since zener diode reverse recovery time is long, it is whithin a period of time conducting state, causes silicon-controlled mistake
Triggering, the generation of such case in silicon-controlled gate leve so add a filter capacitor C1 in order to prevent.
Rectification lets out energy circuit as shown in figure 3, it is alternating voltage to take the voltage that electric CT is induced from circuit, and is supervised online
Power supply needed for measurement equipment is DC power supply, therefore the voltage induced from current transformer first has to handle through over commutation.Due to
Late-class circuit needs let out energy circuit and carry out energy of releasing, and rectification circuit be combined with each other by the utility model with energy circuit is let out, and makes one
A existing rectified action of circuit structure is let out and can be acted on again, has simplified circuit, has added reliability, when after step voltage not less than setting
When determining threshold value, on the grid of switch tube T1 and T2 plus low level, entire circuit are equivalent to rectifier bridge, electric current are carried out whole
Stream；When rear step voltage is more than given threshold, increase level on the grid of switch tube T1 and T2, electric current passes through 1 He of switch transistor T
T2 releases, and diode D1 and D2 due to back-pressure and by；D1 and D2 here using power frequency diode, choose by through-current capability
For the current value after circuit maximum short circuit current divided by the turn ratio.Switch transistor T 1 and the through-flow parameter of T2 are chosen and diode D1 and D2
Choose also identical, the pressure-resistant of D1, D2, T1 and T2 for CT secondary sides ceiling voltage and is stayed there are one nargin.
Aerial drainage control circuit is as shown in figure 4, during larger current transformer primary current, and secondary winding in current transformer is negative
Carrying the voltage generated in impedance also can be very high, in order to ensure to take safe operation in electric CT primary current possible range, it is necessary to adopt
The voltage that measure limitation secondary current is taken to be generated on load impedance.DC voltage is judged using voltage comparator, works as voltage
During higher than setting value, MOS is started by comparator, by CT secondary side short circuits, so that protection power source circuit is not damaged.In view of working as
Switch transistor T 1 and T2 want frequent movement when voltage reaches threshold value, and working frequency is higher, reduce control using hysteresis loop comparator here
Sensitivity processed, to prevent voltage comparator frequent movement.
Claims (4)
1. the monitoring sensing of cable circulation takes power supply module, including CT electricity getting devices (1), lightning protection circuit (2), storage are further included
Energy circuit (6) and voltage-stabilizing output circuit (7), it is characterised in that：Further include silicon-controlled overvoltage crowbar (3), energy electricity is let out in rectification
Road (4), aerial drainage control circuit (5).
2. a kind of cable circulation monitoring sensing according to claim 1 takes power supply module, it is characterised in that：It is described controllable
Silicon overvoltage crowbar (3) includes a bidirectional triode thyristor, two zener diodes and a filter capacitor.
3. a kind of cable circulation monitoring sensing according to claim 1 takes power supply module, it is characterised in that：The rectification
Letting out energy circuit (4) includes two isolated gate FETs and four diodes.
4. a kind of cable circulation monitoring sensing according to claim 1 takes power supply module, it is characterised in that：The aerial drainage
Control circuit (5) includes hysteresis loop comparator, resistance, PNP type triode and NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721528799.7U CN207426718U (en) | 2017-11-15 | 2017-11-15 | The monitoring sensing of cable circulation takes power supply module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721528799.7U CN207426718U (en) | 2017-11-15 | 2017-11-15 | The monitoring sensing of cable circulation takes power supply module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207426718U true CN207426718U (en) | 2018-05-29 |
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ID=62305057
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721528799.7U Active CN207426718U (en) | 2017-11-15 | 2017-11-15 | The monitoring sensing of cable circulation takes power supply module |
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| Country | Link |
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| CN (1) | CN207426718U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614276A (en) * | 2020-03-28 | 2020-09-01 | 青岛鼎信通讯股份有限公司 | Be applied to high efficiency CT of electric wire netting product and get electric circuit |
-
2017
- 2017-11-15 CN CN201721528799.7U patent/CN207426718U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614276A (en) * | 2020-03-28 | 2020-09-01 | 青岛鼎信通讯股份有限公司 | Be applied to high efficiency CT of electric wire netting product and get electric circuit |
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