CN219349107U - Online measuring device for injection multi-frequency signal arc suppression coil - Google Patents
Online measuring device for injection multi-frequency signal arc suppression coil Download PDFInfo
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- CN219349107U CN219349107U CN202223399899.8U CN202223399899U CN219349107U CN 219349107 U CN219349107 U CN 219349107U CN 202223399899 U CN202223399899 U CN 202223399899U CN 219349107 U CN219349107 U CN 219349107U
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Abstract
The utility model relates to the technical field of power distribution, in particular to an on-line measuring device for an injection multi-frequency signal arc suppression coil, which comprises a grounding transformer, wherein one end of the grounding transformer is connected with a first switch through a connecting wire, the other end of the grounding transformer is connected with a load switch turn-type arc suppression coil, a connecting wire between the grounding transformer and the load switch turn-type arc suppression coil is provided with a second switch, an inner overvoltage protector is connected to the connecting wire between the second switch and the grounding transformer, and an outer auxiliary voltage transformer is connected to the outer side of the inner overvoltage protector; the method for measuring the capacitance current by injecting the multi-frequency signals into the power distribution network does not use a measuring mode for comparing parameters of the power distribution network, and has the advantages of simple structure, high measuring accuracy, good measuring stability, high equipment operation reliability, strong adaptability and good safety.
Description
Technical Field
The utility model relates to the technical field of power distribution, in particular to an on-line measuring device for an injection multi-frequency signal arc suppression coil.
Background
The existing online measurement control device of the matched arc suppression coil mainly relies on the asymmetric voltage of the power distribution network to adjust the gear to conduct the measurement mode of converting capacitance current, the urban power distribution network is mainly a cable line, the asymmetric voltage is too low, the capacitance current measurement accuracy is easy to cause and has a large error, the power distribution network of the overhead line is large in the influence of weather, and the frequent gear shifting of the matched arc suppression coil equipment is easy to cause, so that the service life of the on-load voltage regulation switch and the stable operation of the arc suppression equipment are influenced.
In order to ensure the safe operation of the power distribution network, in view of the defect that the existing capacitor current measuring device matched with the automatic tuning arc suppression coil is influenced by the parameters of the power distribution network, in order to avoid incorrect gear and abnormal frequent gear shifting of equipment operation caused by capacitor current measurement, a novel capacitor current measuring mode and device which are not influenced by the outgoing line mode and weather change of the power distribution network are required to be developed,
the novel arc suppression coil capacitance current online measurement device to be developed needs to meet the following requirements: 1. the measurement accuracy is high, and the operation requirements of equipment and a power distribution network are met; 2. the measurement stability is good, and the measurement is not influenced by weather variation; 3. the equipment has high operation reliability and strong adaptability, and is not influenced by the online mode of the power distribution network; therefore, an on-line measuring device for the injection multi-frequency signal arc suppression coil is provided for the problems.
Disclosure of Invention
The utility model aims to provide an on-line measuring device for an injection multi-frequency signal arc suppression coil, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
as an alternative to the on-line measuring device of the injection multifrequency signal arc suppression coil of the present utility model, the present utility model comprises: the utility model provides an injection multifrequency signal arc suppression coil on-line measuring device, includes the grounding transformer, the one end of grounding transformer is connected with first switch through the connecting wire, the other end of grounding transformer is connected with on-load switch turn-regulating arc suppression coil, the second switch is installed to the connecting wire between grounding transformer and the on-load switch turn-regulating arc suppression coil to be connected with interior overvoltage protector on the connecting wire between second switch and the grounding transformer, interior overvoltage protector outside is connected with outer auxiliary voltage transformer.
As an alternative to the on-line measuring device of the injection multifrequency signal arc suppression coil of the present utility model, the present utility model comprises: the on-load switch turn-adjusting arc suppression coil is connected with a damping resistor box and a high-frequency signal arc suppression coil on-line measuring device through a connecting wire.
As an alternative to the on-line measuring device of the injection multifrequency signal arc suppression coil of the present utility model, the present utility model comprises: and the secondary side of the outer auxiliary voltage transformer is connected with a microcomputer controller.
Compared with the prior art, the utility model has the beneficial effects that:
the existing equipment is an amplitude method or a phase method, the defects that the asymmetric voltage of an urban distribution network is low and the asymmetric voltage of an overhead line is influenced by weather change cannot be overcome, according to the situation, a mode of measuring capacitance current by injecting multi-frequency signals into the distribution network is adopted, and a measuring mode of comparing parameters of the distribution network is not used any more.
The secondary measurement signal is sent and collected by a multi-frequency signal on-line measurement device;
the measurement accuracy is high, and the problem of large capacitance current measurement error caused by low asymmetric voltage of the urban power distribution network is solved;
the measurement stability is good, and the problem of abnormal gear shifting of equipment caused by weather changes of the overhead line of the power distribution network is solved;
the equipment has high running reliability, accurate running gear and small ground residual current;
the adaptability is strong, and the method is suitable for each voltage class and outgoing line mode of the power distribution network;
the safety is good, and the multifrequency measuring signal is injected through the voltage transformer by the neutral point of the grounding transformer, so that the safe operation of equipment and a power distribution network is ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
fig. 2 is a flow chart of the present utility model.
In the figure: 1. a grounding transformer; 2. turn-adjusting arc suppression coil of on-load switch; 3. damping resistance box; 4. the high-frequency signal arc suppression coil on-line measuring device; 5. an external auxiliary voltage transformer; 6. an internal overvoltage protector; 7. a first switch; 9. and a second switch.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
Referring to fig. 1 and 2, the present utility model provides a technical solution:
the utility model provides an injection multifrequency signal arc suppression coil on-line measuring device, includes earthing transformer 1, and the one end of above-mentioned earthing transformer 1 is connected with first switch 7 through the connecting wire, and the other end of above-mentioned earthing transformer 1 is connected with on-load switch turn-type arc suppression coil 2, and second switch 9 is installed to the connecting wire between above-mentioned earthing transformer 1 and the on-load switch turn-type arc suppression coil 2 to be connected with interior overvoltage protection ware 6 on the connecting wire between second switch 9 and the earthing transformer 1, the outside of above-mentioned interior overvoltage protection ware 6 is connected with outer auxiliary voltage transformer 5 in parallel.
The turn-adjusting arc suppression coil 2 of the on-load switch is connected with a damping resistor box 3 and a high-frequency signal arc suppression coil on-line measuring device 4 through connecting wires.
The secondary side of the external auxiliary voltage transformer 5 is connected with a microcomputer controller.
When in use, the microcomputer controller is externally connected with a power supply, and serves as a technical means disclosed in the art, and is not repeated herein, the on-line measuring device for the multi-frequency signal arc suppression coil consists of 6 parts, namely a multi-frequency signal generating module, a signal acquisition module, a gear control module, a display module, a microcomputer processing module and a power supply module; the matching device comprises 5 parts, namely a grounding transformer 1, a turn-adjusting arc suppression coil 2 of the on-load switch, a damping resistor box 3, an outer auxiliary voltage transformer 5 and an inner overvoltage protector 6;
the on-load switch is adjusted to the optimal position according to the capacitance current measured by the on-line measuring device of the multi-frequency signal arc suppression coil when the system is not grounded in a normal state, namely, the compensation current is adjusted to the optimal position, so that residual current is less than 5A, the system waits for grounding, and when the system is in single-phase grounding, the compensation current is immediately output for compensation, and because the device is provided with a locking link, the switch cannot be adjusted when the system is grounded;
the multi-frequency signal arc suppression coil on-line measuring device adopts the method that multi-frequency signals are injected into a power grid to measure capacitance current, and after the system load changes, the corresponding zero sequence impedance of the system also changes.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides an injection multifrequency signal arc suppression coil on-line measuring device, includes ground connection transformer (1), its characterized in that: one end of the grounding transformer (1) is connected with a first switch (7) through a connecting wire, the other end of the grounding transformer (1) is connected with a load switch turn-type arc suppression coil (2), a connecting wire between the grounding transformer (1) and the load switch turn-type arc suppression coil (2) is provided with a second switch (9), an inner overvoltage protector (6) is connected to a connecting wire between the second switch (9) and the grounding transformer (1), and an outer auxiliary voltage transformer (5) is connected to the outer side of the inner overvoltage protector (6).
2. The on-line measuring device of an injection multifrequency signal arc suppression coil according to claim 1, wherein: the on-load switch turn-regulating arc suppression coil (2) is connected with a damping resistor box (3) and a high-frequency signal arc suppression coil on-line measuring device (4) through connecting wires.
3. The on-line measuring device of an injection multifrequency signal arc suppression coil according to claim 1, wherein: and the secondary side of the outer auxiliary voltage transformer (5) is connected with a microcomputer controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223399899.8U CN219349107U (en) | 2022-12-19 | 2022-12-19 | Online measuring device for injection multi-frequency signal arc suppression coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223399899.8U CN219349107U (en) | 2022-12-19 | 2022-12-19 | Online measuring device for injection multi-frequency signal arc suppression coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219349107U true CN219349107U (en) | 2023-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223399899.8U Active CN219349107U (en) | 2022-12-19 | 2022-12-19 | Online measuring device for injection multi-frequency signal arc suppression coil |
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| Country | Link |
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| CN (1) | CN219349107U (en) |
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2022
- 2022-12-19 CN CN202223399899.8U patent/CN219349107U/en active Active
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