CN218727955U - Railway power supply system protector test equipment - Google Patents
Railway power supply system protector test equipment Download PDFInfo
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- CN218727955U CN218727955U CN202222920186.5U CN202222920186U CN218727955U CN 218727955 U CN218727955 U CN 218727955U CN 202222920186 U CN202222920186 U CN 202222920186U CN 218727955 U CN218727955 U CN 218727955U
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Abstract
The utility model relates to a railway power supply system protector test equipment, including casing, a plurality of current transformer, a plurality of voltage transformer, electrical unit and box, casing surface department is provided with display element, a plurality of wiring district and inverter output, be provided with respectively in the wiring district with each secondary terminal of current transformer and each secondary terminal adaptation of voltage transformer jack, the inverter output is established ties and is had the current limiting resistance; the jacks of the wiring areas, the output end of the inverter and the display unit are respectively electrically connected with the control unit; the box body is used for placing the casing, the current transformers and the voltage transformers. The grounding boot for the railway high-voltage overhead line has the beneficial effects of being capable of simulating real scenes and being convenient and fast to use.
Description
Technical Field
The utility model relates to an electric power overhauls instrument technical field, especially relates to a railway power supply system protector test equipment.
Background
At present, after a transformer of a substation is newly built and overhauled, a phase tester with load is used for measuring and analyzing whether voltage and current phases meet the requirements of load protection and relay protection when a power system in China is electrified. However, for railway traction and power distribution, the load current is small, the loads of the uplink and downlink power supply arms of the traction substation are different, the precision requirement for measuring the phase of the phase meter cannot be met, the test data is complex, and the analysis process is high in specialty. Therefore, how to measure the secondary loop phase of the transformer protection current transformer becomes a key technology for eliminating careless leakage (such as incorrect CT polarity, open circuit of a secondary loop, short circuit, wrong wiring, poor contact and the like) in the relay protection design, installation, wiring and setting processes of the transformer before normal power supply of railway traction power transformation and power distribution.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a safe and reliable, simple operation and high railway high pressure overhead line ground connection boots of work efficiency.
The technical scheme of the utility model is that:
a railway power supply system protector test device comprises a shell, a plurality of current transformers, a plurality of voltage transformers, a power supply unit and a box body, wherein a display unit, a plurality of wiring areas and an inverter output end are arranged on the surface of the shell, jacks matched with secondary ends of the current transformers and secondary ends of the voltage transformers are respectively arranged in the wiring areas, and current limiting resistors are connected with the output end of the inverter in series; the jacks of the wiring areas, the output end of the inverter and the display unit are electrically connected with the control unit respectively; the box body is used for placing the shell, the current transformers and the voltage transformers.
Preferably, each current transformer and each voltage transformer are provided with a characteristic mark, and each socket is provided with a characteristic mark corresponding to each current transformer and each voltage transformer.
Preferably, the display unit is a color liquid crystal display screen.
Preferably, the resistor is an adjustable resistor.
Preferably, the box body is provided with a plurality of placing grooves, and each placing groove is used for placing the casing, each current transformer and each voltage transformer in each placing groove respectively.
Preferably, the mobile terminal further comprises a wireless transmission unit, wherein the wireless transmission unit is electrically connected with the control unit and is adapted to the mobile terminal.
Preferably, the chip of the wireless transmission unit is any one of bluetooth, wiFi, zigBee, irDA, transferJet.
Preferably, a guide code is provided at an outer wall of the housing.
Preferably, the guide code is a bar code or a two-dimensional code.
Preferably, the chip of the control unit is a single chip microcomputer or a PLC programmable controller.
Compared with the prior art, the utility model discloses a railway power supply system protector test equipment can simulate the true sight of power supply system gross error protector work through dc-to-ac converter conversion DC power supply.
Each current transformer and each voltage transformer of the railway power supply system protector test equipment are connected with the control unit through the jacks, so that the railway power supply system protector test equipment is convenient and fast to use.
Drawings
Fig. 1 is a schematic diagram of an embodiment of the testing apparatus for railway power supply system protector of the present invention.
Fig. 2 is the utility model discloses a circuit connection schematic diagram of railway power supply system protector test equipment.
The reference numbers in the figures illustrate:
101-a voltage transformer; 102 a current transformer; 103-jack; 104-a display unit; 105-a box body; 106-inverter output end, and 107-casing.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In this embodiment, the test equipment for the railway power supply system protector is applied to an electrical test of a current transformer of a longitudinal differential protector on high and low voltage sides of a traction transformer and a distribution transformer of a railway electrification power supply system.
The power supply unit, the control unit and the inverter are installed in the cabinet 107. The power supply unit is used for supplying power to the control unit, the inverter and the display unit 104, and the power supply unit can adopt a direct-current power supply so as to check the connection of a loop polarity, a secondary loop polarity, a transformation ratio, a current mutual and a voltage mutual of the traction transformer substation and the current mutual inductor of the total difference protector on the high side and the low side of the power distribution substation when the traction transformer substation and the power distribution substation which are newly built, overhauled and subjected to preventive experiments are not loaded. Wherein, the power supply unit can be in the form of a rechargeable power supply. The charging voltage can adopt 220V alternating current so as to directly adopt 220V alternating current to ensure that the railway power supply system protector test equipment can also work normally when the electric quantity of the power supply unit is exhausted.
The inverter is used for converting direct current into alternating current and supplying power to primary ends of current transformers on the high and low voltage sides of a traction substation and a distribution substation in the test process. The frequency of the inverter is the same as the commercial power frequency, and the output voltage waveform is a sine wave. In order to realize real simulation of actual conditions, the inverter is preferably a three-phase inverter, and the phase angle of the output voltage is 120 °. When the inverter output 106 is used as a current source, the current limiting resistor provided at the inverter output 106 functions as a current limiting to prevent the device from being overloaded due to an excessive current.
The jacks 103 of the wiring areas arranged on the surface of the casing 107 are respectively used for plugging the current transformers 102 and the voltage transformers 101. The jack 103 may be a dc jack, so that the current transformers 102 and the voltage transformers 101 can be connected quickly.
The jack 103, the inverter output end 106 and the display unit 104 of each wiring area are respectively electrically connected with the control unit. Specifically, the control unit includes a control chip, a plurality of voltage acquisition units, a plurality of current acquisition units, and each jack 103 at the wiring area is electrically connected with the corresponding voltage acquisition unit and current acquisition unit respectively. The inverter output end 106 is electrically connected with the corresponding voltage acquisition unit and the current acquisition unit. Each voltage acquisition unit is used for acquiring the voltage values of the secondary end of each voltage transformer 101 and the output end 106 of the inverter respectively, and transmitting the voltage values to the control chip after digital conversion. Each current collecting unit is used for collecting the current values of the secondary end of each current transformer 102 and the output end 106 of the inverter, and transmitting the current values to the control chip after digital conversion. The display unit 104 is used for displaying various detection data in the electrical test process. The TSC101 chip can be selected as the current acquisition unit, the me2808 chip can be selected as the voltage acquisition unit, and the 51-series single chip microcomputer or the PLC can be selected as the chip of the control unit.
The case 105 is used to house the cabinet 107, the current transformers 102 and the voltage transformers 101, and the connecting wires. When the railway power supply system protector test equipment is transported, each functional unit can be placed in the shell 107, and the box body 105 has a good storage function. During use, in order to facilitate the taking of each current transformer 102, each voltage transformer 101 and the connecting wires, a plurality of accommodating areas can be further arranged in the box body 105.
In a specific use, the inverter output end 106 is connected in parallel with the primary end of the current transformer of the longitudinal differential protection device through a wire. The primary end of each current transformer 102 and the primary end of each voltage transformer 101 are respectively connected with the secondary end of the current transformer of the longitudinal differential protection device. After a power supply switch of the equipment is turned on, the inverter provides a current source and a voltage source for the primary end of a current transformer of the longitudinal differential protection device. The control unit respectively collects the primary end current value and the voltage value of the current transformer of the longitudinal differential protection device, and collects the secondary end current value and the voltage value of each current transformer 102 and each voltage transformer 101. It is understood that the transformation ratio of each current transformer 102 and each voltage transformer 101 of the power experimental facility is a certain value. Therefore, the current value and the voltage value of the secondary end of the current transformer of the longitudinal differential protection device can be obtained, and the transformation ratio and the polarity of the current transformer of the longitudinal differential protection device can be obtained by comparing the current value and the voltage value of the secondary end of the current transformer of the longitudinal differential protection device. Meanwhile, the display unit can display the actually measured voltage, current and transformation ratio polarity in real time. Therefore, whether the secondary end of the longitudinal differential protection device has the phenomena of open circuit, short circuit, wiring error, poor contact and the like can be visually judged.
In this embodiment, each current transformer 102 and each voltage transformer 101 are provided with a feature identifier, and each jack 103 is provided with a feature identifier corresponding to each current transformer 102 and each voltage transformer 101. Specifically, each current transformer 102 may be labeled as CT1-CT6, and each voltage transformer 101 may be labeled as VT1-VT6. And are similarly labeled at each of the receptacles 103. When the device is used, a worker can quickly determine whether the primary end and the secondary end of the current transformer of the longitudinal differential protection device have problems according to the primary end connecting line of the current transformer of the longitudinal differential protection device and port data fed back by each voltage transformer 101 and each current transformer 102 at the display unit 104 in real time.
In this embodiment, the mobile terminal further includes a wireless transmission unit, the wireless transmission unit is electrically connected to the control unit, and the wireless transmission unit is adapted to the mobile terminal. Specifically, when the test data downloading device is used, the test data can be connected with the mobile terminal through the wireless transmission unit, and therefore a worker can conveniently download the test data. The chip of the wireless transmission unit is any one of Bluetooth, wiFi, zigBee, irDA and TransferJet. The chip manufactured based on the communication principle has the advantages of mature technology, stable performance and low cost.
In this embodiment, a boot code is provided at an outer wall of the housing 107. In use, the boot code functions to provide a download address. After the test is finished, the staff can scan the guide code and transmit the test data to the mobile phone of the staff according to the download address provided by the guide code. The guide code is a bar code or a two-dimensional code.
The above-mentioned embodiments are only specific embodiments of the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is within the technical scope of the present invention, and according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered in the protection scope of the present invention.
Claims (10)
1. A railway power supply system protector test device comprises a case (107), a plurality of current transformers (102), a plurality of voltage transformers (101), a power supply unit and a box body (105), and is characterized in that a display unit (104), a plurality of wiring areas and an inverter output end (106) are arranged on the surface of the case (107), jacks (103) matched with the secondary ends of the current transformers (102) and the secondary ends of the voltage transformers (101) are respectively arranged in the wiring areas, and the inverter output end (106) is connected with a current limiting resistor in series;
the jacks (103) of the wiring areas, the inverter output end (106) and the display unit (104) are respectively electrically connected with the control unit;
the box body (105) is used for accommodating the shell (107), each current transformer (102) and each voltage transformer (101).
2. The railway power supply system protector test equipment as claimed in claim 1, wherein each current transformer (102) and each voltage transformer (101) are provided with a characteristic mark, and each jack (103) is provided with a characteristic mark corresponding to each current transformer (102) and each voltage transformer (101).
3. A railway power supply system protector test rig as claimed in claim 1, characterized in that the display unit (104) is a color liquid crystal display.
4. The railway power system protector test rig of claim 1, wherein the resistor is an adjustable resistor.
5. The railway power supply system protector test equipment as claimed in claim 1, wherein a plurality of placing grooves are formed at the box body (105), and each placing groove is used for placing the casing (107), each current transformer (102) and each voltage transformer (101) in each placing groove.
6. The railway power supply system protector testing equipment as claimed in claim 1, further comprising a wireless transmission unit, wherein the wireless transmission unit is electrically connected with the control unit, and the wireless transmission unit is adapted to the mobile terminal.
7. The railway power supply system protector test equipment as claimed in claim 6, wherein the chip of the wireless transmission unit is any one of Bluetooth, wiFi, zigBee, irDA and TransferJet.
8. A railway power supply system protector testing device according to claim 7, characterized in that a guide code is provided at the outer wall of the housing (107).
9. The railway power system protector testing apparatus of claim 8, wherein the guide code is a bar code or a two-dimensional code.
10. The railway power supply system protector testing equipment as claimed in claim 1, wherein the chip of the control unit is a single chip microcomputer or a PLC programmable controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222920186.5U CN218727955U (en) | 2022-11-03 | 2022-11-03 | Railway power supply system protector test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222920186.5U CN218727955U (en) | 2022-11-03 | 2022-11-03 | Railway power supply system protector test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218727955U true CN218727955U (en) | 2023-03-24 |
Family
ID=85598243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222920186.5U Active CN218727955U (en) | 2022-11-03 | 2022-11-03 | Railway power supply system protector test equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218727955U (en) |
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2022
- 2022-11-03 CN CN202222920186.5U patent/CN218727955U/en active Active
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