CN209709949U - A kind of DC isolation power supply for mesohigh power grid - Google Patents
A kind of DC isolation power supply for mesohigh power grid Download PDFInfo
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- CN209709949U CN209709949U CN201920593151.0U CN201920593151U CN209709949U CN 209709949 U CN209709949 U CN 209709949U CN 201920593151 U CN201920593151 U CN 201920593151U CN 209709949 U CN209709949 U CN 209709949U
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Abstract
The utility model provides a kind of for mesohigh power grid DC isolation power supply, including the potential device being connected between the low-voltage component on ground power supply and high-voltage line, the potential device includes two U-iron ferrite cores, the end of described two U-iron ferrite cores is respectively symmetrically inserted among primary coil and secondary coil, the secondary coil includes frame and the winding set on lower portion, and the lower portion is filled with epoxy resin layer；The electric current both ends of the secondary coil pass through silica gel line respectively and connect with low-voltage component；Electric current one end of the primary coil is connect with ground power supply, the other end is connected with power switch tube.The utility model structure is simple, compact, and size power density is big, fast response time, and safe and stable low-tension supply is provided for the low-voltage component on high-voltage fence.
Description
Technical field
The utility model relates to a kind of isolated power supplies, and in particular to a kind of DC isolation power supply for mesohigh power grid.
Background technique
In mesohigh electrical grid transmission route, there are different equipment, such as high-tension cut-off switch, transmission line protects equipment
Deng usually having some low-voltage components in such devices, south will provide low-tension supply for these low-voltage components when use, be
Guarantee the requirement of safety or insulation, if it is very difficult for obtaining power supply directly in mesohigh power grid, because if
From the voltage of 10KV or more obtain component needed for voltage (such as 5V, 12V), in addition to high-power transformer, also to there is safety to examine
Consider, different voltages grade has different safe distances, insulated electro pressure difference, so will be from in State Grid's professional standard
The equipotential electronic circuit of high-voltage fence obtains power supply, and there is presently no better methods.
So DC isolation power supply is needed to pass through equipment of the ground to being mounted on mesohigh power grid in mesohigh power grid
The power supply of relevant voltage value is provided.
Utility model content
The purpose of this utility model is to provide a kind of DC isolation power supplys for mesohigh power grid, to be mounted on middle height
Equipment on voltage electric grid provides the voltage of safety.
The technical solution of the utility model is as follows:
One kind being used for mesohigh power grid DC isolation power supply, including the low pressure member device being connected on ground power supply and high-voltage line
Potential device between part, the potential device include two U-iron ferrite cores, the end of described two U-iron ferrite cores
Portion is respectively symmetrically inserted among primary coil and secondary coil, the secondary coil include frame and set on lower portion around
Group, the lower portion are filled with epoxy resin layer；The electric current both ends of the secondary coil pass through silica gel line and low pressure member respectively
Device connection；Electric current one end of the primary coil is connect with ground power supply, the other end is connected with power switch tube.
Further scheme, described power switch tube one end is connect with primary coil, the other end and sample resistance connect.
Further scheme, the lower portion of the secondary coil are equipped with rectifier, and the rectifier is serially connected in be connected with winding
On the silica gel line connect.
Further scheme on the silica gel line between secondary coil and low-voltage component and is connected to voltage to frequency convert
Device, the voltage to frequency converter are serially connected with FV convertor by optical fiber, and the signal of the FV convertor is defeated
The signal end of outlet and power switch tube connects the conduction amount for controlling power switch tube.
The input terminal of further scheme, the voltage to frequency converter is serially connected with filter capacitor.
Originally practical newly to drive middle voltage to frequency converter, FV convertor, rectifier, power switch tube, filtered electrical into
Hold etc. be component commonly used in the art, be not related to each component this body structure improve, be it is commercially available come for this
Utility model is assembled into, and the equipment to be mounted on mesohigh power grid provides low-voltage.
The winding of secondary coil is wrapped in epoxy resin by the utility model, and is connect using silica gel line with winding,
To farthest improve insulating properties.In addition, by built in rectifier in the epoxy because epoxy resins insulation intensity is remote
Much larger than the dielectric strength of air, while being also prevented from interference.
Voltage to frequency converter is arranged in low-voltage component (high pressure) side, frequency-voltage conversion circuit the utility model
Primary coil side is set, and transmitting information content is carried out by optical fiber.This is to make high-pressure side output voltage stabilization, it is necessary to
There is the information of high side voltage value, this value is changed into optical signal, is transmitted by optical fiber, is simulated by FV convertor
Voltage value controls the conduction amount of power switch tube in primary circuit, makes its output voltage stabilization.
On silica gel line and it is connected to voltage to frequency converter in the utility model, is then converted by optical fiber and voltage to frequency
Device its purpose is to enhance the anti-interference ability of signal, and is conducive to transmit at a distance.
Wherein: voltage to frequency converter is a kind of device for realizing analog-digital conversion function, and analog voltage amount is transformed to arteries and veins
Signal is rushed, the frequency of the output pulse signal and the size of input voltage are directly proportional.After voltage signal is converted to pulse signal,
The anti-interference ability of signal can significantly be enhanced, be also conducive to transmission at a distance.FV convertor is to input frequency
Signal is converted to the device of corresponding analog voltage amplitude output signal.
Due in the utility model primary coil by sample resistance ground connection, secondary coil winding be wrapped in epoxy resin
Interior, to realize the input terminal of the power supply of its output voltage and output end is isolation, as DC isolation power supply is improved
The safety of power supply.Sometimes when high-voltage fence power-off maintenance, the alternating current on ground may also be powered off, then can pass through ground power supply
Or battery is reverse into corresponding voltage needed for circuit.
DC voltage VCC is obtained from ground power supply (or battery), electric current passes through primary coil to power switch tube, conductive line
Road；Then primary coil generates the magnetic field of alternation, is coupled to secondary coil by two U-iron ferrite cores and generates certain friendship
Then time variant voltage generates DC voltage by rectifier and supplies the low-voltage component being mounted on mesohigh power grid；Direct current simultaneously
Voltage is after filter capacitor filters, then carries out long distance ionization voltage through voltage to frequency converter, FV convertor conversion and turn
After changing, pulse-width modulation PWM signal is provided for power switch tube, Voltage Feedback is made it through and adjusts its duty ratio, to reach steady
Determine the purpose of output voltage.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
In figure: 1- sample resistance, 2- power switch tube, 3- primary coil, 4- silica gel line, 5-U shape FERRITE CORE, 6- times
Grade coil, 7- optical fiber, 8- rectifier, 9- voltage frequency conversioning circuit, 10- frequency-voltage conversion circuit, 11- filter capacitor.
Specific embodiment
The utility model is described further with reference to the accompanying drawing:
As shown in Figure 1, a kind of be used for mesohigh power grid DC isolation power supply, including it is connected on ground power supply and high-voltage line
Low-voltage component between potential device, the potential device include two U-iron ferrite cores 5, described two U-iron oxygen
The end of body magnetic core 5 is respectively symmetrically inserted among primary coil 3 and secondary coil 6, and the secondary coil 6 includes frame and is set to
The winding of lower portion, the lower portion are filled with epoxy resin layer；The electric current both ends of the secondary coil 6 pass through silicon respectively
Tree lace 4 is connect with low-voltage component；Electric current one end of the primary coil 3 is connect with ground power supply, the other end is connected with power
Switching tube 2.
Further scheme, described 2 one end of power switch tube is connect with primary coil 3, the other end and sample resistance 1 connect.
Can then primary coil be made to have overcurrent protection.
The lower portion of further scheme, the secondary coil 6 is equipped with rectifier 8, and the rectifier 8 is serially connected in and winding
On the silica gel line 4 of connection.
On silica gel line 4 between secondary coil 6 and low-voltage component and it is connected to voltage to frequency converter 9, the electricity
Voltage-frequency rate converter 9 is serially connected with FV convertor 10, the signal output end of the FV convertor 10 by optical fiber 7
The conduction amount for controlling power switch tube 2 is connect with the signal end of power switch tube 2.
The input terminal of the voltage to frequency converter 9 is serially connected with filter capacitor 11.
DC voltage VCC is obtained from ground power supply (or battery), electric current is led by primary coil 2 to power switch tube 2
Logical route；Then primary coil 2 generates the magnetic field of alternation, is coupled to secondary coil 6 by two U-iron ferrite cores 5 and generates
Then certain alternating voltage generates DC voltage by rectifier 8 and supplies the low-voltage component being mounted on mesohigh power grid
(being not drawn into figure)；DC voltage turns after the filtering of filter capacitor 11, then through voltage to frequency converter 9, voltage to frequency simultaneously
After parallel operation conversion 10 carries out the conversion of long distance ionization voltage, pulse-width modulation PWM signal is provided for power switch tube, it is anti-to make it through voltage
Feedback adjusts its duty ratio, to be reached for the purpose that low-voltage component exports stable low-voltage.In addition, due to the utility model
Middle primary coil is grounded, the winding of secondary coil is wrapped in epoxy resin, to realize the defeated of the power supply of its output voltage
Enter end and output end is isolation, as DC isolation power supply, improves the safety of power supply.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various changes and improvements that the technical solution of utility model is made should all fall into the protection that the utility model claims book determines
In range.
Claims (5)
1. one kind is used for mesohigh power grid DC isolation power supply, including the low-voltage component being connected on ground power supply and high-voltage line
Between potential device, the potential device include two U-iron ferrite cores (5), described two U-iron ferrite cores (5)
End be respectively symmetrically inserted among primary coil (3) and secondary coil (6), it is characterised in that: the secondary coil (6) includes
Frame and winding set on lower portion, the lower portion are filled with epoxy resin layer；The electric current two of the secondary coil (6)
End is connect by silica gel line (4) with low-voltage component respectively；Electric current one end of the primary coil (3) connect with ground power supply,
The other end is connected with power switch tube (2).
2. according to claim 1 a kind of for mesohigh power grid DC isolation power supply, it is characterised in that: the power is opened
Pass pipe (2) one end is connect with primary coil (3), the other end and sample resistance (1) connect.
3. according to claim 1 a kind of for mesohigh power grid DC isolation power supply, it is characterised in that: the secondary wire
The lower portion for enclosing (6) is equipped with rectifier (8), and the rectifier (8) is serially connected on the silica gel line (4) connecting with winding.
4. according to claim 1 a kind of for mesohigh power grid DC isolation power supply, it is characterised in that: be located at secondary wire
On silica gel line (4) between circle (6) and low-voltage component and it is connected to voltage to frequency converter (9), the voltage to frequency converter
(9) it is serially connected with FV convertor (10) by optical fiber (7), the signal output end and function of the FV convertor (10)
The signal end of rate switching tube (2) connects the conduction amount for controlling power switch tube (2).
5. according to claim 4 a kind of for mesohigh power grid DC isolation power supply, it is characterised in that: the voltage frequency
The input terminal of rate converter (9) is serially connected with filter capacitor (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920593151.0U CN209709949U (en) | 2019-04-28 | 2019-04-28 | A kind of DC isolation power supply for mesohigh power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920593151.0U CN209709949U (en) | 2019-04-28 | 2019-04-28 | A kind of DC isolation power supply for mesohigh power grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209709949U true CN209709949U (en) | 2019-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920593151.0U Active CN209709949U (en) | 2019-04-28 | 2019-04-28 | A kind of DC isolation power supply for mesohigh power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209709949U (en) |
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2019
- 2019-04-28 CN CN201920593151.0U patent/CN209709949U/en active Active
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