CN217689243U - Electrolytic bath system ground fault detection positioning device - Google Patents
Electrolytic bath system ground fault detection positioning device Download PDFInfo
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- CN217689243U CN217689243U CN202123404403.7U CN202123404403U CN217689243U CN 217689243 U CN217689243 U CN 217689243U CN 202123404403 U CN202123404403 U CN 202123404403U CN 217689243 U CN217689243 U CN 217689243U
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Abstract
The utility model discloses an electrolysis trough system ground fault detection positioner aims at providing one kind and can judge fast whether earth fault takes place for the electrolysis trough to find out the detection device of trouble position. It comprises a signal collector; the signal collector (6), the alarm (1) and the display (2) are all electrically connected with the PLC (3). The utility model discloses only need have the characteristic of higher harmonic according to rectifier power itself, perhaps according to the distribution electric capacity current characteristic of electrolysis trough generating line, perhaps according to generating line to ground voltage characteristic, can confirm the electrolysis trough that takes place ground fault fast. The utility model discloses detection efficiency is high, positioning accuracy is good, convenient operation.
Description
Technical Field
The utility model relates to a device for detecting the earth fault of an electrolytic bath system, in particular to a detecting and positioning device for the earth fault of the electrolytic bath system; belongs to the technical field of electrolytic bath fault detection.
Background
The electrolytic cell is an important device in the electrolytic smelting process, and an electrolytic cell system is formed by connecting hundreds of electrolytic cells in series through a direct current bus (busbar), wherein the passing electrolytic current can reach hundreds of kA. Due to the particularity of the electrowinning environment, the electrolytic cell is subject to earth faults (electric leakage) frequently. If the treatment is not carried out in time, the system current is easy to reduce, and the efficiency of the electrolytic cell is reduced and even damaged. In order to ensure continuous and stable power supply of the electrolytic cell and improve the current efficiency, the fault position must be detected and found out in time, so that the maintenance of workers is facilitated.
At present, the electrolytic cell system grounding positioning detection method mainly comprises two methods: the first method is to judge the grounding point fault of the No. 7 electrolytic tank by measuring the theoretical zero potential offset of the bus, such as CN101995518A. Since the number of electrolytic cells connected in series is as large as several hundred, the voltage across each electrolytic cell (cell voltage) often deviates greatly from the normal value (4V). For example, when a certain electrolytic cell is grounded, the cell voltage is as high as 30 to 50V, and the positioning error of more than 10 electrolytic cells can be brought about by only one electrolytic cell. The second method is to apply an additional ac voltage to the busbar and determine whether the electrolyzer is grounded by measuring parameters such as phase and amplitude, such as CN112034283A. But the additional applied ac voltage will introduce new harmonics.
Disclosure of Invention
To the above-mentioned defect that exists among the prior art, the utility model aims at providing an electrolysis trough system ground fault detects positioner, and the device need not additionally to apply voltage can judge whether the electrolysis trough ground connection fast, accurately to find out the trouble position.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the device comprises a signal collector; the signal collector, the alarm and the display are all electrically connected with the PLC.
The signal collector in the above technical scheme can be of the following structures:
the PLC comprises n current collectors electrically connected with a PLC controller and two current transformers connected to the current collectors, wherein secondary side coils of the two current transformers on each current collector are reversely connected; n is the total number of electrolytic cells in the system.
The wireless receiving device can also be composed of n current collectors electrically connected with the PLC, and two wireless receiving coils connected to the current collectors, wherein the two wireless receiving coils on each current collector are reversely connected, and each wireless receiving coil is positioned near the bus and is vertical to the bus; n is the total number of cells in the system.
The device can also be composed of a current collector electrically connected with the PLC controller and n +1 current transformers electrically connected with the current collector; n is the total number of cells in the system.
The wireless receiving device can also be composed of a current collector electrically connected with the PLC and n +1 wireless receiving coils electrically connected with the current collector, wherein each wireless receiving coil is positioned near the bus and is vertical to the bus; n is the total number of electrolytic cells in the system.
Or the system can be composed of n +1 voltage collectors electrically connected with a PLC controller, wherein n is the total number of the electrolytic cells in the system.
In each technical scheme, the PLC is electrically connected with the background computer through the network communication module.
Compared with the prior art, the utility model, by adopting the technical proposal, does not need to additionally apply voltage to the bus of the electrolytic cell, and only needs to detect the magnitude and the direction of the current of the higher harmonic wave according to the characteristic that the rectifying power supply (providing power to the electrolytic cell) has the higher harmonic wave; or according to the characteristic of capacitance current generated by the distributed capacitance between the electrolytic cell bus and the ground at the grounding moment, detecting the magnitude and the direction of the instantaneous capacitance current; or according to the characteristic that the ground voltage of the bus is zero when the ground fault occurs, which one or more than one of the hundreds of electrolytic cells is/are grounded can be quickly and accurately found out. Therefore, the utility model has the advantages of high detection efficiency, good positioning precision, simple used equipment, convenient operation and the like.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of the second embodiment of the present invention;
FIG. 3 is a schematic diagram of the third embodiment of the present invention;
FIG. 4 is a schematic structural diagram of the fourth embodiment of the present invention;
FIG. 5 is a schematic diagram of the fifth embodiment of the present invention;
FIG. 6 is a schematic diagram of the operation of the apparatus of configuration one for detecting an earth fault in an electrolyzer system based on harmonic current characteristics;
FIG. 7 is a schematic diagram of the operation of the apparatus of configuration one for detecting a ground fault in an electrolyzer system based on transient capacitive current characteristics;
FIG. 8 is a schematic diagram of the operation of the apparatus of configuration two for detecting an earth fault in an electrolyzer system based on harmonic current characteristics;
FIG. 9 is a schematic diagram of the operation of the apparatus of configuration two for detecting a ground fault in an electrolyzer system based on transient capacitive current characteristics;
FIG. 10 is a schematic diagram of the operation of the apparatus of configuration three for detecting an earth fault in the electrolyzer system based on the harmonic current characteristics;
FIG. 11 is a schematic diagram of the operation of the apparatus of configuration three for detecting a ground fault in an electrolyzer system based on transient capacitive current characteristics;
FIG. 12 is a schematic diagram of the operation of the apparatus employing configuration four and detecting an earth fault in the electrolyzer system based on the harmonic current characteristics;
FIG. 13 is a schematic diagram of the operation of the apparatus of configuration four for detecting a ground fault in an electrolyzer system based on transient capacitive current characteristics;
FIG. 14 is an operation diagram for detecting the earth fault of the electrolyzer system based on the voltage characteristic of the bus bar to earth by using the apparatus of the fifth configuration.
In the figure: the device comprises an alarm 1, a display 2, a PLC 3, a network communication module 4, a background computer 5, a signal collector 6, a current collector 6-1, a current transformer 6-2, a wireless receiving coil 6-3, a voltage collector 6-4, a bus 7 and an electrolytic cell 8.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 6 to 14: the cell system is made up of hundreds of cells 8 (344 total cells in each example herein) connected in series by busbars 7, with a rectified voltage of 1600V across the cell system.
Example 1
As shown in fig. 1: the PLC 3 is respectively and electrically connected with the alarm 1, the display 2 and the signal collector 6. The signal collector is composed of n current collectors 6-1 electrically connected with the PLC 3 and two current transformers 6-2 connected to each current collector 6-1, and secondary side coils (not shown in the figure) of the two current transformers 6-2 on each current collector 6-1 are reversely connected; n is the total number of electrolytic cells 8 in the system.
The working steps are as follows:
1) The primary coils of the two current transformers 6-2 on each current collector 6-1 in the figure 1 are connected with the buses 7 at the inlet end and the outlet end of the corresponding electrolytic cell 8 according to the connection modes shown in the figures 6 and 7;
2) Each current collector 6-1 automatically collects the harmonic current difference value delta i of the two ends of the corresponding electrolytic tank 8 nx ＝i njx -i ncx ，i njx Is the harmonic current of the inlet terminal, i ncx Is the harmonic current at the outlet end; or the current collector 6-1 automatically collects the instantaneous capacitance current difference value delta i at the two ends of each electrolytic cell 8 nc ＝i njc -i ncc ，i njc Is the instantaneous capacitance current, i, at the inlet end ncc Is the instantaneous capacitance current at the outlet end;
3) The PLC 3 collects the harmonic current difference value delta i collected by each current collector 6-1 nx And harmonic current setting value i xd Make a comparison if Δ i nx ≧i xd The result shows that the No. n electrolytic cell 8 is grounded;
or the PLC 3 collects the instantaneous capacitance current difference value delta i of each current collector 6-1 nc And instantaneous capacitance current setting value i cd Make a comparison if Δ i nc ≧i cd This means that the nth electrolytic cell 8 is grounded.
Example 2
On the basis that the basic structure is the same as that of the embodiment 1, the utility model can also adopt the structure as shown in fig. 2: each current transformer 6-2 is correspondingly replaced by the same number of wireless receiving coils 6-3. Namely: the signal collector 6 consists of n current collectors 6-1 electrically connected with the PLC 3 and two wireless receiving coils 6-3 connected to the current collectors 6-1, the two wireless receiving coils 6-3 on each current collector 6-1 are reversely connected, and each wireless receiving coil 6-3 is positioned near the bus 7 and is vertical to the bus; n is the total number of cells in the system.
The working steps are as follows:
the working steps of the embodiment are the same as those of the embodiment 1, and the difference between the working steps is that the installation mode is different: two wireless receiving coils 6-3 on each current collector 6-1 in the figure 2 are arranged near the buses 7 at the inlet end and the outlet end of the corresponding electrolytic cell 8 according to the modes shown in the figures 8 and 9, and the wireless receiving coils 6-3 are ensured to be vertical to the buses 7.
Example 3
On the basis that the basic structure is the same as that of the embodiment 1, the utility model can also adopt the structure as shown in fig. 3: the signal collector 6 consists of a current collector 6-1 electrically connected with the PLC 3 and n +1 current transformers 6-2 electrically connected with the current collector; n is the total number of cells in the system.
The working steps are as follows:
1) The primary coils of the current transformers 6-2 in the figure 3 are connected to the buses 7 of the inlet end and the outlet end of the corresponding electrolytic cell 8 according to the modes shown in the figures 10 and 11;
2) The current collector 6-1 transmits the harmonic current vector values at the two ends of each electrolytic cell 8 or the instantaneous capacitance current vector values at the two ends of each electrolytic cell 8, which are collected by each current transformer 6-2, to the PLC 3;
3) The PLC 3 respectively calculates the difference value delta i of harmonic current vector values between the inlet end and the outlet end of each electrolytic cell 8 nxs ＝i njxs -i ncxs ，i njxs Is the harmonic current vector value i of the inlet end of the No. n electrolytic cell 8 ncxs Is the harmonic current vector value of the outlet end of the No. n electrolytic cell 8;
or the PLC 3 respectively calculates the difference value delta i of the instantaneous capacitance current vector value between the inlet terminal and the outlet terminal of each electrolytic cell 8 ncs ＝i njcs -i nccs ，i njcs Is the instantaneous capacitance current vector value i of the inlet end of the No. n electrolytic cell 8 nccs Is the instantaneous capacitance current vector value of the outlet end of the No. n electrolytic tank 8;
4) The PLC controller 3 automatically makes the following judgments:
if Δ i nxs ≧i xsd Then, i represents that the n-th electrolytic cell 8 is grounded, i xsd Setting a harmonic current vector value;
or if Δ i ncs ≧i csd And then means that the n-th electrolytic cell 8 is grounded, i csd The instantaneous capacitance current vector setting value is obtained.
Example 4
On the basis that the basic structure is the same as that of the embodiment 3, the utility model can also adopt the structure as shown in fig. 4: each current transformer 6-2 is correspondingly replaced by the same number of wireless receiving coils 6-3. Namely: the signal collector 6 consists of a current collector 6-1 electrically connected with the PLC 3 and n +1 wireless receiving coils 6-3 electrically connected with the current collector, and each wireless receiving coil 6-3 is positioned near the bus and is vertical to the bus; n is the total number of cells in the system.
The working steps are as follows:
the working principle of the embodiment is the same as that of the embodiment 3, and the difference between the two is that the installation mode is different: each wireless receiving coil 6-3 in fig. 4 is arranged near the bus 7 at the inlet end and the outlet end of the corresponding electrolytic tank 8 according to the mode shown in fig. 12 and fig. 13, and the wireless receiving coil 6-3 is ensured to be vertical to the bus 7.
Example 5
On the basis that the basic structure is the same as that of the embodiment 1, the utility model can also adopt the structure as shown in fig. 5: the signal collector 6 is composed of n +1 voltage collectors 6-4 electrically connected with the PLC 3, and n is the total number of the electrolytic cells in the system.
The working steps are as follows:
1) Each voltage collector 6-4 in the figure 5 is connected with the bus 7 of the inlet end and the outlet end of the corresponding electrolytic cell 8 according to the connection mode shown in the figure 14;
2) Each voltage collector 6-4 transmits the voltage to ground of the wire inlet end of each electrolytic cell 8 collected by the voltage collector to the PLC controller 3;
3) The PLC controller 3 automatically makes the following judgments:
if U is nj ＞0、U (n+1)j If < 0, the nth electrolytic cell 8 is grounded; u shape nj Is the voltage to earth, U, of the inlet end of the No. n electrolytic cell 8 (n+1)j The voltage to ground of the outlet end of the No. n electrolytic tank 8;
or, if U nj ＝0、U mj If =0, it means that the electrolytic cell 8 of No. n and the electrolytic cell 8 of No. m are grounded; u shape mj The voltage to ground of the inlet end of the m-shaped electrolytic cell 8;
or, if U (n-1)j ＞0、U nj ＝0、U (n+1)j If the number is less than 0, the bus between the outlet end of the No. n-1 electrolytic cell 8 and the inlet end of the No. n electrolytic cell 8 is grounded; u shape (n-1)j Is the voltage to ground of the inlet end of the No. n-1 electrolytic cell 8.
In order to improve the degree of automation, the PLC controller 3 in each of the above examples is in communication connection with the background computer 5 through the network communication module 4, so that automatic management and monitoring can be realized.
Claims (7)
1. An electrolytic bath system ground fault detection positioning device comprises a signal collector; the method is characterized in that: the signal collector (6), the alarm (1) and the display (2) are all electrically connected with the PLC (3).
2. The electrolyzer system ground fault detection positioning device of claim 1 characterized in that: the signal collector (6) is composed of n current collectors (6-1) electrically connected with the PLC (3) and two current transformers (6-2) connected to the current collectors (6-1), and secondary side coils of the two current transformers (6-2) on each current collector (6-1) are reversely connected; n is the total number of cells in the system.
3. The electrolyzer system ground fault detection positioning device of claim 1 characterized in that: the signal collector (6) is composed of n current collectors (6-1) electrically connected with the PLC (3) and two wireless receiving coils (6-3) connected to the current collectors (6-1), the two wireless receiving coils (6-3) on each current collector (6-1) are reversely connected, and each wireless receiving coil (6-3) is positioned near a bus and is vertical to the bus; n is the total number of cells in the system.
4. The electrolyzer system ground fault detection positioning device of claim 1 characterized in that: the signal collector (6) is composed of a current collector (6-1) electrically connected with the PLC (3) and n +1 current transformers (6-2) electrically connected with the current collector; n is the total number of electrolytic cells in the system.
5. The electrolyzer system ground fault detection positioning device of claim 1 characterized in that: the signal collector (6) is composed of a current collector (6-1) electrically connected with the PLC (3) and n +1 wireless receiving coils (6-3) electrically connected with the current collector, and each wireless receiving coil (6-3) is positioned near the bus and is vertical to the bus; n is the total number of cells in the system.
6. The electrolyzer system ground fault detection positioning device of claim 1 characterized in that: the signal collector (6) is composed of n +1 voltage collectors (6-4) electrically connected with the PLC (3), wherein n is the total number of the electrolytic tanks in the system.
7. The electrolyzer system ground fault detection positioning device of any of claims 1 to 6 characterized in that: the PLC controller (3) is electrically connected with the background computer (5) through the network communication module (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123404403.7U CN217689243U (en) | 2021-12-30 | 2021-12-30 | Electrolytic bath system ground fault detection positioning device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123404403.7U CN217689243U (en) | 2021-12-30 | 2021-12-30 | Electrolytic bath system ground fault detection positioning device |
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| CN217689243U true CN217689243U (en) | 2022-10-28 |
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| CN202123404403.7U Active CN217689243U (en) | 2021-12-30 | 2021-12-30 | Electrolytic bath system ground fault detection positioning device |
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