CN207832936U - A kind of power distribution network cable detecting device - Google Patents
A kind of power distribution network cable detecting device Download PDFInfo
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- CN207832936U CN207832936U CN201820315525.8U CN201820315525U CN207832936U CN 207832936 U CN207832936 U CN 207832936U CN 201820315525 U CN201820315525 U CN 201820315525U CN 207832936 U CN207832936 U CN 207832936U
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Abstract
The embodiment of the present application discloses a kind of power distribution network cable detecting device, including power supply, pressure regulator, compensating electric capacity case, current lifting device, laying chamber, current transformer, PLC programmable controller and motor, wherein power electric connection is in the input terminal of pressure regulator；The output end of pressure regulator is electrically connected to compensating electric capacity case；The output end of compensating electric capacity case is electrically connected to current lifting device；Current lifting device is electrically connected by high current circuit with chamber is laid with；The input terminal of current transformer is electrically connected to high current circuit；The output end of current transformer is electrically connected to PLC programmable controller；The output end of PLC programmable controller is electrically connected to motor；Motor is electrically connected to pressure regulator.A kind of power distribution network cable detecting device provided by the present application exports true primary current using large-scale current lifting device, can implement temperature rise test for the different constructions of cable, different laying environments, reflect cable load condition, provide safeguard for cable safe and stable operation.
Description
Technical field
The invention relates to electric system detection technique field, more particularly to a kind of power distribution network cable detecting device.
Background technology
Continuous with city medium and high voltage cable circuit builds and puts into operation, and power supply system is evolved as is with high-tension cable
Main, there is operating status the trend of complicated variety, the requirement to cable run security reliability to be also continuously improved.Distribution cable
Economy, the reliability of operation are mainly influenced by ambient enviroment, service condition and system of laying, if it is there are problem,
The current-carrying capacity that will influence distribution cable, to transmission bottlenecks occur, the normal transport for influencing electric energy uses.
Cable conductor temperature is the important parameter of cable running safety, since cable is insulated by major insulation, institute
To be limited by technical conditions so that cable conductor temperature cannot be directly measured acquisition.Therefore, researcher leads cable
Thermometer body has been considered numerous studies, and the current country is the power cable constant load current-carrying capacity IEC according to the meeting of International Power committee
60287 standards determine current-carrying capacity after calculating different laying situations, the different constructions of cable；With the development of numerical heat transfer,
Researcher starts with the distribution in numerical computation method analysis and solution buried cable temperature field and current-carrying capacity, method are mainly wrapped
Include finite difference calculus, FInite Element, boundary element method, Finite Volume Method for Air etc..
However, existing research method must be based on external environment to calculate current-carrying capacity of cable, and actual cable is laid
External environment complexity it is various, can not accurately obtain each laying environmental parameter, it is inaccurate, wrong to eventually lead to testing result
Difference, and detection process is complicated, performance difficulty.
Utility model content
This application provides a kind of power distribution network cable detecting devices, and to solve, testing result in the prior art is inaccurate, misses
The problems such as poor big, and detection mode applicability is low, and power distribution network cable detecting device provided by the present application is simple in structure, can open
The temperature rise test of the various constructions of cable is opened up, to occur the load of emergency generation in power scheduling with providing reference.
This application provides a kind of power distribution network cable detecting device, the power distribution network cable detecting device includes power supply, is adjusted
Depressor, compensating electric capacity case, current lifting device are laid with chamber, current transformer, PLC programmable controller and motor, wherein
The power electric connection is in the input terminal of the pressure regulator；
The output end of the pressure regulator is electrically connected to the compensating electric capacity case；
The output end of the compensating electric capacity case is electrically connected to the current lifting device；
The current lifting device is electrically connected by high current circuit with the laying chamber；
The input terminal of the current transformer is electrically connected to the high current circuit；
The output end of the current transformer is electrically connected to the PLC programmable controller；
The output end of the PLC programmable controller is electrically connected to the motor；
The motor is electrically connected to the pressure regulator.
Optionally, the high current circuit includes the first access section and the second access section；The current lifting device, first access
Section, the laying chamber and the second access section constitute circuit.
Optionally, described to be laid with the cable being equipped in chamber through the laying chamber, it is set on the cable
There are to be measured section of cable, the first access section and the second access section to be connect respectively with one end of the to be measured section of cable.
Optionally, the to be measured section of cable is equipped with several humiture probes being uniformly arranged, the to be measured section of cable
Respectively the humiture of setting one is popped one's head at both ends.
Optionally, the compensating electric capacity case is composed in parallel by multiple unit capacitor.
Optionally, the capacitor group number is four groups.
Optionally, the laying chamber is enclosure space.
Optionally, the laying chamber is made of all steel material, and the stainless steel is anti-chlorine ion corrosion
Stainless steel C-15.
Optionally, the current lifting device is high current current lifting device, and highest is flowed up to 8000A.
Optionally, the laying chamber is connected with ground wire.
By the above technology it is found that this application provides a kind of power distribution network cable detecting device, including power supply, pressure regulator are mended
Capacitive is repaid, current lifting device is laid with chamber, current transformer, PLC programmable controller and motor, wherein the power supply is electrically connected
It is connected to the input terminal of the pressure regulator；The output end of the pressure regulator is electrically connected to the compensating electric capacity case；The compensating electric capacity
The output end of case is electrically connected to the current lifting device；The current lifting device is electrically connected by high current circuit with the laying chamber；Institute
The input terminal for stating current transformer is electrically connected to the high current circuit；The output end of the current transformer is electrically connected to described
PLC programmable controller；The output end of the PLC programmable controller is electrically connected to the motor；The motor is electrically connected to
The pressure regulator.A kind of power distribution network cable detecting device provided by the present application exports true primary electricity using large-scale current lifting device
Stream can be directed to the different constructions of cable, different laying environment implementation temperature rise tests, reflect cable load condition, be that cable is steady safely
Fixed operation provides safeguard.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of structural schematic diagram of power distribution network cable detecting device of the application；
Fig. 2 is that chamber internal structure chart is laid in a kind of power distribution network cable detecting device of the application；
Wherein, 1- power supplys, 2- pressure regulators, 3- compensating electric capacity casees, 4- current lifting devices, 5- high current circuits, 51- first access section,
52- second accesses section, and 6- is laid with chamber, and 61- humitures are popped one's head in, to be measured section of cable of 62-, 63- ground wires, 7- current transformers,
8-PLC programmable controllers, 9- motors.
Specific implementation mode
Embodiment one
It is a kind of structural schematic diagram of power distribution network cable detecting device of the application referring to Fig. 1.
As shown in Figure 1, a kind of power distribution network cable detecting device provided by the embodiments of the present application includes power supply 1, pressure regulator 2,
Compensating electric capacity case 3, current lifting device 4 are laid with chamber 6, current transformer 7, PLC programmable controller 8 and motor 9, wherein
The power supply 1 is electrically connected to the input terminal of the pressure regulator 2；
The output end of the pressure regulator 2 is electrically connected to the compensating electric capacity case 3；
The output end of the compensating electric capacity case 3 is electrically connected to the current lifting device 4；
The current lifting device 4 is electrically connected by high current circuit 5 with the laying chamber 6；
The input terminal of the current transformer 7 is electrically connected to the high current circuit 5；
The output end of the current transformer 7 is electrically connected to the PLC programmable controller 8；
The output end of the PLC programmable controller 8 is electrically connected to the motor 9；
The motor 9 is electrically connected to the pressure regulator 2.
By above technical scheme it is found that present embodiments providing a kind of power distribution network detection device, wherein the power supply 1, institute
It states pressure regulator 2, the compensating electric capacity case 3 and the current lifting device 4 and constitutes current loop before up-flow, the current lifting device 4 and the height
Current circuit 5, the laying chamber 6 constitute current loop after up-flow；The Current Mutual Inductance is set after up-flow on current loop
Current measurement signal is sent to the PLC programmable controller 8 by device 7, then from the PLC programmable controller 8 to the electricity
Machine 9 sends control instruction, and the motor 9 is connected to the variable resistance end of the pressure regulator 2, and the pressure regulator 2 is adjusted and accesses circuit
The variation of middle resistance value.The function of each component and effect in device are illustrated below：
Power supply 1：In the present embodiment, the power supply 1 is supplied to the pressure regulator 2 to work required electric energy, rated voltage
380V。
Pressure regulator 2：Pressure regulator is connected between power supply and load, mixes corresponding trigger control circuit plate, so that it may with adjustment
Voltage, electric current and the power being added in load.In the present embodiment, the pressure regulator 2 is for adjusting in the preceding current loop of up-flow
Size of current；Meanwhile it is big can be adjusted electric current by the control of the motor 9 in working condition according to actual conditions for the pressure regulator 2
It is small.
Compensating electric capacity case 3：The electrical equipment of electric system will produce reactive power, and typically inductive when in use
, it can be such that the capacity service efficiency of power supply reduces, and can be able to by way of suitably increasing capacitance in systems
Improve.A large amount of inductive load can make the phase of power grid generate deviation in circuit, and characteristic of the capacitance in circuit and inductance are just
Well on the contrary, redeeming.
Current lifting device 4：Also known as strong current generator, high-current test equipment, heavy current tester, strong current generator
Load capacity is most suitable for by force a bus protection and verification current transformer ratio etc., and can to electric current relay and switch into
Row adjusts verification.Current lifting device is using energy-saving automatic coupling voltage regulator and high magnetic conduction current lifting device, and instrument is 0.5 grade of liquid crystal display, is surveyed
Amount is accurate.And match digital electric stopwatch, time measurement can be met.With output power, added losses are small, anti-overload ability
By force, the features such as easy to operate, clear reading, flexible movement, is suitable for power system technology personnel and examines current transformer, protection
Device and secondary loop current experiment are used.
It is laid with chamber 6：Temperature and Humidity for detecting to be measured section of power distribution network cable, can be laid under varying environment
The dielectric material of the classifications such as experimental condition, such as sandy soil, pure water, plasterboard, mud, hot water, brine.
Current transformer 7：Primary side high current secondary side low current is converted into according to electromagnetic induction principle to measure
Instrument is made of the iron core and winding that are closed.Its first winding the number of turns is seldom, goes here and there in the circuit for the electric current for needing to measure,
Therefore it often has whole electric currents of circuit to flow through, and secondary winding turn ratio is more, is serially connected in measuring instrumentss and protective loop,
At work, its secondary circuit is to be closed always to current transformer, therefore measuring instrumentss and protective loop series coil
Impedance very little, the close short circuit of working condition of current transformer.In the present embodiment, electric current after the current transformer 7 will flow up
Current signal in circuit is sent to the PLC programmable controller 8, to be accurately controlled to loop current.
PLC programmable controller 8：The programmable controller of early stage is referred to as programmable logic controller (PLC) (Programmable
Logic Controller), abbreviation PLC, it is mainly used to that relay is replaced to realize logic control.With the development of technology, this
The function of kind device has greatly exceeded the range of logic control, and therefore, today, this device was referred to as programmable controller, letter
Claim PC.But in order to avoid obscuring with the abbreviation of personal computer (Personal Computer), so by programmable controller
Abbreviation PLC.It uses the memory that can be programmed, and is used for storage inside it and executes logical operation, sequential operation, meter
When, the operations such as counting and arithmetical operation instruction, and can be output and input by digital or analog, control various types
Machinery or production process.
In the present embodiment, the PLC programmable controller 8 will be carried out from the current signal of the current transformer 7
Storage and operation, convert result of calculation to the control action to the motor 9.
It is that chamber internal structure chart is laid in a kind of power distribution network cable detecting device of the application referring to Fig. 2.
Optionally, the high current circuit 5 includes that the first access section 51 and second accesses section 52；The current lifting device 4, described
One access section 51, the laying chamber 6 and the second access section 52 constitute circuit.
Optionally, described be laid in chamber 6 is equipped on the cable for being laid with chamber 6, the cable
Equipped with to be measured section of cable 62, the first access section 51 and described second accesses one of section 52 respectively with the to be measured section of cable 62
End connection.
Further, the length of the to be measured section of cable 62 depends on described first and accesses section 51 and the second access section
Distance between 52 access points need to detect the length of to be measured section of cable 62 described in length adjustment when actually measuring experiment according to single
Degree.
Optionally, the to be measured section of cable 62 is equipped with several humiture probes 61 being uniformly arranged, the to be measured section of electricity
A humiture probe 61 is respectively arranged in the both ends of cable 62.
Further, the humiture probe being arranged in the present embodiment 61 is a kind of sensor, can will be warm and humid in air
Degree is by detection device, and after measuring humiture, the information for being transformed into electric signal or other required forms according to certain rules is defeated
Go out, and is shown in the display screen for being laid with chamber 6.
Optionally, the compensating electric capacity case 3 is composed in parallel by multiple unit capacitor.Multiple unit capacitor is in parallel, can further increase
Strong compensation effect promotes power supply capacity service efficiency.
Optionally, the capacitor group number is four groups.In order to reduce equipment while maximizing increase compensation effect
Complexity is preferably provided with the compensating electric capacity case 3 that four groups of capacitors in parallel are constituted, can reach preferably in the present embodiment
Test effect.
Optionally, the laying chamber 6 is enclosure space.
Further, the laying chamber 6 can be set to the rectangular box body that length, width and height are respectively 5m, 1m, 1.5m, and four
It takes closing measure week, external corrosive substance etc. can be effectively prevent to influence test result, guarantee test precision.
Optionally, the laying chamber 6 is made of all steel material, and the stainless steel is anti-chlorine ion corrosion
Stainless steel C-15.
C15 steel be on 316 stainless steel bases by carry high Mo content and be added it is other trace element bys formed, mainly at
Point (%) is；C ＜ 0.08, St ＜ l.00, Mn ＜ 1.50, Cr：17~19, Ni：11~13, Mo ＞ 5.5 etc..C15 stainless steels have
There is excellent corrosion resistance, cable can be effectively prevent to be corroded.
Optionally, the current lifting device 4 is high current current lifting device, and highest is flowed up to 8000A.
Three-phase high current current lifting device is also generator, be according to power department and industrial and mining enterprises electric equipment test such as：
Various switches, current transformer and other electrical equipments are made current loading experiment and temperature rise test and are specially manufactured and designed special
Equipment.Small product size, weight use split structure, and there is the electrodeless adjustment of output current, electric current to rise balance, load variations model
Enclose big, reliable operation, it is easy to operate, safe the features such as, be that industrial and mining enterprises carry out up-flow or the comparatively ideal equipment of temperature rise test.
Optionally, the laying chamber 6 is connected with ground wire 63.
In order to ensure safety, ground wire 63 is set in 6 outside of the laying chamber, avoids occurring to leak electricity that personnel is caused to hinder
It dies.
By above technical scheme it is found that this application provides a kind of power distribution network cable detecting device, including power supply 1, pressure regulation
Device 2, compensating electric capacity case 3, current lifting device 4 are laid with chamber 6, current transformer 7, PLC programmable controller 8 and motor 9, wherein
The power supply 1 is electrically connected to the input terminal of the pressure regulator 2；The output end of the pressure regulator 2 is electrically connected to the compensating electric capacity
Case 3；The output end of the compensating electric capacity case 3 is electrically connected to the current lifting device 4；The current lifting device 4 by high current circuit 5 with it is described
Chamber 6 is laid with to be electrically connected；The input terminal of the current transformer 7 is electrically connected to the high current circuit 5；The current transformer
7 output end is electrically connected to the PLC programmable controller 8；The output end of the PLC programmable controller 8 is electrically connected to institute
State motor 9；The motor 9 is electrically connected to the pressure regulator 2.A kind of power distribution network cable detecting device provided by the present application is using greatly
Type current lifting device exports true primary current, can be directed to the different constructions of cable, different laying environments implement temperature rise test, reflection electricity
Cable load condition provides safeguard for cable safe and stable operation.
Those skilled in the art will readily occur to this practicality after considering specification and putting into practice utility model disclosed herein
Novel other embodiments.This application is intended to cover any variations, uses, or adaptations of the utility model, these
Variations, uses, or adaptations follow the general principle of the utility model and include undocumented skill of the utility model
Common knowledge in art field or conventional techniques.The description and examples are only to be considered as illustrative, the utility model
True scope and spirit are indicated by the following claims.
It should be understood that the utility model is not limited to the accurate knot for being described above and being shown in the accompanying drawings
Structure, and various modifications and changes may be made without departing from the scope thereof.The scope of the utility model is only wanted by appended right
It asks to limit.
Claims (10)
1. a kind of power distribution network cable detecting device, which is characterized in that the power distribution network cable detecting device includes power supply (1), is adjusted
Depressor (2), compensating electric capacity case (3), current lifting device (4) are laid with chamber (6), current transformer (7), PLC programmable controller
(8) and motor (9), wherein
The power supply (1) is electrically connected to the input terminal of the pressure regulator (2)；
The output end of the pressure regulator (2) is electrically connected to the compensating electric capacity case (3)；
The output end of the compensating electric capacity case (3) is electrically connected to the current lifting device (4)；
The current lifting device (4) is electrically connected by high current circuit (5) with the laying chamber (6)；
The input terminal of the current transformer (7) is electrically connected to the high current circuit (5)；
The output end of the current transformer (7) is electrically connected to the PLC programmable controller (8)；
The output end of the PLC programmable controller (8) is electrically connected to the motor (9)；
The motor (9) is electrically connected to the pressure regulator (2).
2. a kind of power distribution network cable detecting device according to claim 1, which is characterized in that high current circuit (5) packet
Include the first access section (51) and the second access section (52)；The current lifting device (4), the first access section (51), the laying examination
Tryoff (6) and the second access section (52) constitute circuit.
3. a kind of power distribution network cable detecting device according to claim 2, which is characterized in that the laying chamber (6)
Interior to be equipped with the cable through the laying chamber (6), the cable is equipped with to be measured section of cable (62), and described first connects
Enter section (51) and the second access section (52) is connect with one end of the to be measured section of cable (62) respectively.
4. a kind of power distribution network cable detecting device according to claim 3, which is characterized in that the to be measured section of cable (62)
Several humiture probes (61) being uniformly arranged are equipped with, respectively setting one is described warm and humid at the both ends of the to be measured section of cable (62)
Degree probe (61).
5. a kind of power distribution network cable detecting device according to claim 1, which is characterized in that the compensating electric capacity case (3)
It is composed in parallel by multiple unit capacitor.
6. a kind of power distribution network cable detecting device according to claim 5, which is characterized in that the capacitor group number is four
Group.
7. a kind of power distribution network cable detecting device according to claim 1, which is characterized in that the laying chamber (6)
For enclosure space.
8. a kind of power distribution network cable detecting device according to claim 1, which is characterized in that the laying chamber (6)
It is made of all steel material, the stainless steel is anti-chlorine ion corrosion stainless steel C-15.
9. a kind of power distribution network cable detecting device according to claim 1, which is characterized in that the current lifting device (4) is big
Electric current current lifting device, highest are flowed up to 8000A.
10. a kind of power distribution network cable detecting device according to claim 1, which is characterized in that the laying chamber (6)
It is connected with ground wire (63).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820315525.8U CN207832936U (en) | 2018-03-08 | 2018-03-08 | A kind of power distribution network cable detecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820315525.8U CN207832936U (en) | 2018-03-08 | 2018-03-08 | A kind of power distribution network cable detecting device |
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| Publication Number | Publication Date |
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| CN207832936U true CN207832936U (en) | 2018-09-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114217121A (en) * | 2021-12-08 | 2022-03-22 | 通鼎互联信息股份有限公司 | Electrical experiment method for determining rated average power of radio frequency |
-
2018
- 2018-03-08 CN CN201820315525.8U patent/CN207832936U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114217121A (en) * | 2021-12-08 | 2022-03-22 | 通鼎互联信息股份有限公司 | Electrical experiment method for determining rated average power of radio frequency |
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