CN215450596U - Ground resistance simulation training device based on 10kV power distribution transformer - Google Patents
Ground resistance simulation training device based on 10kV power distribution transformer Download PDFInfo
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- CN215450596U CN215450596U CN202121348757.1U CN202121348757U CN215450596U CN 215450596 U CN215450596 U CN 215450596U CN 202121348757 U CN202121348757 U CN 202121348757U CN 215450596 U CN215450596 U CN 215450596U
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Abstract
The utility model provides a grounding resistance simulation training device based on a 10kV power distribution transformer, which comprises a 10kV simulation intelligent transformer, a drop-out fuse, a low-voltage intelligent distribution box and a resistance simulation circuit board, wherein the high-voltage side of the 10kV simulation intelligent transformer is connected with a simulation overhead line through the drop-out fuse so as to simulate a high-voltage incoming line; the low-voltage side of the 10kV simulation intelligent transformer is connected with the low-voltage intelligent distribution box through a low-voltage cable so as to simulate a low-voltage outgoing line; the low-voltage intelligent distribution box is provided with a simulation intelligent electric meter, and the simulation intelligent electric meter is also connected with a simulation intelligent acquisition terminal; the neutral point of the 10kV simulation intelligent transformer is connected with a ground network through the resistance value simulation circuit board so as to simulate different grounding resistance values, so that trainees can truly observe and measure the influence and damage of different resistance values of the grounding resistance on the power supply quality of the circuit.
Description
Technical Field
The utility model relates to a practical training assessment device, in particular to a grounding resistance value simulation practical training device based on a 10kV power distribution transformer.
Background
The power supply quality is influenced by the size of the ground resistance value of the distribution transformer, if the ground resistance value is too large, equipment can be burnt due to abnormal power supply, even danger can be caused to personal safety, and therefore practitioners must know the harm and precautionary measures of the too large ground resistance value.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a grounding resistance simulation training device based on a 10kV power distribution transformer.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a grounding resistance simulation training device based on a 10kV power distribution transformer comprises a 10kV simulation intelligent transformer, a drop-out fuse, a simulation overhead line, a low-voltage intelligent distribution box and a resistance simulation circuit board,
the high-voltage side of the 10kV simulation intelligent transformer is connected with a simulation overhead line through a drop-out fuse to simulate a high-voltage incoming line;
the low-voltage side of the 10kV simulation intelligent transformer is connected with the low-voltage intelligent distribution box through a low-voltage cable so as to simulate a low-voltage outgoing line; the low-voltage intelligent distribution box is provided with a simulation intelligent electric meter, and the simulation intelligent electric meter is also connected with a simulation intelligent acquisition terminal;
the neutral point of the 10kV simulation intelligent transformer is connected with a ground network through the resistance value simulation circuit board so as to simulate different grounding resistance values.
The beneficial effects of the utility model are as follows:
the utility model provides a grounding resistance simulation training device based on a 10kV power distribution transformer station, which can simulate the operating environment of a low-voltage power distribution station area of a rural power supply station, so that the training scene of trained personnel is closer to the field operation environment, and the influence and the damage to the circuit power supply quality under different conditions of the grounding resistance of a distribution transformer are truly observed and measured.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic structural diagram of a resistance value simulation circuit board according to the present invention;
FIG. 3 is a wiring schematic of the present invention;
wherein, 1, drop-out fuse; 2. a wire rod; 3.10kV simulation intelligent transformer; 4. a low-voltage intelligent distribution box; 5. a power supply load control cabinet; 6. a resistance value simulation circuit board; 7. and (4) H-shaped steel.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
Example 1
FIG. 1 shows a schematic structural diagram of a grounding resistance simulation training device based on a 10kV power distribution transformer, which comprises a 10kV simulation intelligent transformer 3, a drop-out fuse 1, a simulation overhead line, a low-voltage intelligent distribution box 4 and a resistance simulation circuit board 6,
the high-voltage side of the 10kV simulation intelligent transformer 3 is connected with a simulation overhead line through a drop-out fuse 1 so as to simulate high-voltage incoming lines; the low-voltage side of the 10kV simulation intelligent transformer 3 is connected with the low-voltage intelligent distribution box 4 through a low-voltage cable so as to simulate a low-voltage outgoing line; the low-voltage intelligent distribution box 4 is provided with a simulation intelligent electric meter, and the simulation intelligent electric meter is also connected with a simulation intelligent acquisition terminal; the neutral point of the 10kV simulation intelligent transformer 3 is connected with a ground network through the resistance value simulation circuit board 6 so as to simulate different grounding resistance values.
It should be noted that the utility model simulates a 10kV high-voltage incoming line in an on-pole incoming line manner, the high-voltage side of the 10kV intelligent simulation transformer 3 is accessed through a real drop-out fuse (a link switch QF 1), the connection manner is an angle-star shape, the incoming line adopts a 120 insulated wire and a real drop-out fuse, the low-voltage side of the 10kV intelligent simulation transformer 3 is accessed into a simulation user cabinet through a low-voltage cable, the simulation user cabinet comprises a three-phase simulation user and a single-phase simulation user to simulate load equipment, as shown in fig. 3.
The embodiment aims at a simulation training platform built by basic staff of a national power grid company, namely a rural power supply station, and reduces the operating environment of a low-voltage power distribution station area of the rural power supply station to the greatest extent, so that the training scene of trained personnel is closer to the field operation environment, and the influence and the damage to the circuit power supply quality under different conditions of the ground resistance of a distribution transformer are truly observed and measured.
Specifically, the wire rod 2 is a cylindrical steel pipe, the height of the simulation wire rod is 3 meters, and the diameter of the simulation wire rod is not less than 200 mm; i-steel 7 is installed respectively to two-layer about the simulation pole, and 10kV emulation intelligent transformer 3 is placed to the upper strata, and low pressure intelligent power distribution box 4 is placed to the lower floor.
Specifically, the resistance value simulation circuit board 6 comprises a main control board, a relay board and an adjustable resistance circuit, wherein the control end of the main control board is connected with a relay switch coil in the relay board, and relay switches in the relay board are respectively connected with resistors in the adjustable resistance circuit correspondingly; the number of relay switches in the relay board is equal to the number of resistors in the adjustable resistor circuit.
In order to realize the remote control function, the main control board is also communicated and interconnected with the remote monitoring terminal through a remote communication module and is used for receiving a remote control instruction sent by the remote monitoring terminal; and the main control board controls the corresponding relay switch to be closed or opened according to the remote control instruction, so that the remote control of the resistance value simulation circuit board 6 is realized.
Specifically, the main control board is STM32 series singlechip, the remote communication module is ethernet communication module or wiFi wireless communication module, remote monitoring terminal is PC, panel computer or smart mobile phone.
In one embodiment, the relay board includes nine relay switches connected in series, the adjustable resistance circuit includes nine resistors connected in series, and the resistors are connected in one-to-one parallel with the relay switches; as shown in fig. 2, the resistances of the adjustable resistance circuit are sequentially enlarged by 2 times from small to large, and are respectively 1 Ω, 2 Ω, 4 Ω, 8 Ω, 16 Ω, 32 Ω, 64 Ω, 128 Ω and 256 Ω, so that the ground resistance simulation of the distribution transformer with the resistance adjusting range of 0-511 Ω and the adjusting precision of 1 Ω is realized.
When the total resistance value needs to be set to be R, firstly converting the R value (decimal number) into a 16-system number to obtain the value of F, then converting the value of F into a binary number, obtaining the state of a corresponding relay according to the binary number and the 'resistance and relay comparison table' in the following table, then generating a control instruction according to the state of the corresponding relay and sending the control instruction to the main control board so as to control the attraction and disconnection of the relay.
Resistance and relay comparison table, as shown in the following table:
wherein, relay state 0 represents off (relay closed), and relay state 1 represents on (relay open); the value of R ranges from 0 to 511 decimal numbers, F = (M3) (M2) (M1) hexadecimal numbers, and the values of M1, M2 and M3 range from 0 to F.
For example, when R =3 Ω, F =003, translates to a binary number: 000000011, the correspondence of the above table shows that the relay switches K1 and K0 are turned off, and the other relay switches are not operated. For another example: r =511 Ω, F =1FF, converted to a binary number: 111111111, and all the relay switches in the upper table are turned off according to the corresponding relation of the upper table.
Specifically, the analog overhead line comprises an isolating knife switch QS1, a protection switch 4P, a three-phase isolation PT, a power load control cabinet 5 and a voltage and current detection box, wherein a fixed contact of the isolating knife switch QS1 is connected with the wire inlet ends of L1, L2 and L3, a movable contact of the isolating knife switch QS1 is connected with the wire inlet side of the protection switch 4P, the wire outlet side of the protection switch 4P is connected with the wire inlet side of the three-phase isolation PT, the wire outlet side of the three-phase isolation PT is connected with the wire inlet side of a control circuit in the power load control cabinet 5, and the wire outlet sides of the control circuit in the power load control cabinet 5 are respectively connected with the voltage and current detection box and the wire inlet side of the drop-out fuse 1.
The voltage and current detection box is provided with an incoming line power supply working condition display screen and is used for monitoring voltage, current and power factor related real numbers of a 10kV incoming line side; the simulation intelligent ammeter and the simulation intelligent acquisition terminal are used for monitoring and displaying the working condition of the outlet power supply, and real numbers related to real voltage, current and power factor are included.
Furthermore, the high-voltage side of the 10kV simulation intelligent transformer 3 is also connected with a lightning arrester, so that the safety and reliability of the ground resistance simulation practical training device based on the 10kV power distribution transformer station are improved.
Specifically, the low-voltage intelligent distribution box 4 (JP cabinet for short) meets the technical requirements of the intelligent low-voltage distribution box required by the latest technical specifications of the national power grid, and is provided with a wire inlet unit, a metering unit, a compensation unit and a wire outlet unit.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.
Claims (6)
1. The utility model provides a real device of instructing of ground resistance simulation based on 10kV distribution transformer platform which characterized in that: comprises a 10kV simulation intelligent transformer, a drop-out fuse, a simulation overhead line, a low-voltage intelligent distribution box and a resistance value simulation circuit board,
the high-voltage side of the 10kV simulation intelligent transformer is connected with a simulation overhead line through a drop-out fuse to simulate a high-voltage incoming line;
the low-voltage side of the 10kV simulation intelligent transformer is connected with the low-voltage intelligent distribution box through a low-voltage cable so as to simulate a low-voltage outgoing line; the low-voltage intelligent distribution box is provided with a simulation intelligent electric meter, and the simulation intelligent electric meter is also connected with a simulation intelligent acquisition terminal;
the neutral point of the 10kV simulation intelligent transformer is connected with a ground network through the resistance value simulation circuit board so as to simulate different grounding resistance values.
2. The grounding resistance simulation training device based on the 10kV power distribution transformer station as claimed in claim 1, characterized in that: the resistance value simulation circuit board comprises a main control board, a relay board and an adjustable resistance circuit, wherein the control end of the main control board is connected with a relay switch coil in the relay board, and relay switches in the relay board are respectively connected with resistors in the adjustable resistance circuit correspondingly;
the number of relay switches in the relay board is equal to the number of resistors in the adjustable resistor circuit.
3. The grounding resistance simulation training device based on the 10kV power distribution transformer station as claimed in claim 2, characterized in that: the relay board comprises nine relay switches connected in series, the adjustable resistance circuit comprises nine resistors connected in series, and the resistors are connected with the relay switches in parallel in a one-to-one mode.
4. The grounding resistance simulation training device based on the 10kV power distribution transformer station as claimed in claim 2, characterized in that: the main control board is also in communication interconnection with the remote monitoring terminal through the remote communication module and is used for receiving a remote control instruction sent by the remote monitoring terminal.
5. The grounding resistance simulation training device based on the 10kV power distribution transformer station as claimed in claim 1, characterized in that: the analog overhead line comprises an isolating knife switch QS1, a protective air switch 4P, a three-phase isolating PT, a power load control cabinet and a voltage and current detection box, wherein a static contact of the isolating knife switch QS1 is connected with the wire inlet ends of L1, L2 and L3, a movable contact of the isolating knife switch QS1 is connected with the wire inlet side of the protective air switch 4P, the wire outlet side of the protective air switch 4P is connected with the wire inlet side of the three-phase isolating PT, the wire outlet side of the three-phase isolating PT is connected with the wire inlet side of a control circuit in the power load control cabinet, and the wire outlet side of the control circuit in the power load control cabinet is respectively connected with the voltage and current detection box and the wire inlet side of the drop-out fuse.
6. The grounding resistance simulation training device based on the 10kV power distribution transformer station as claimed in claim 1, characterized in that: and the high-voltage side of the 10kV simulation intelligent transformer is also connected with a lightning arrester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121348757.1U CN215450596U (en) | 2021-06-17 | 2021-06-17 | Ground resistance simulation training device based on 10kV power distribution transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121348757.1U CN215450596U (en) | 2021-06-17 | 2021-06-17 | Ground resistance simulation training device based on 10kV power distribution transformer |
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| CN215450596U true CN215450596U (en) | 2022-01-07 |
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| CN202121348757.1U Active CN215450596U (en) | 2021-06-17 | 2021-06-17 | Ground resistance simulation training device based on 10kV power distribution transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117092443A (en) * | 2023-10-18 | 2023-11-21 | 国网辽宁省电力有限公司电力科学研究院 | 10kV transformer area true type test system and true type range test method |
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2021
- 2021-06-17 CN CN202121348757.1U patent/CN215450596U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117092443A (en) * | 2023-10-18 | 2023-11-21 | 国网辽宁省电力有限公司电力科学研究院 | 10kV transformer area true type test system and true type range test method |
| CN117092443B (en) * | 2023-10-18 | 2024-01-09 | 国网辽宁省电力有限公司电力科学研究院 | 10kV transformer area true type test system and true type range test method |
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