CN117174511A - State light reporting device and method for bypass switch of flexible direct-current transmission power module - Google Patents
State light reporting device and method for bypass switch of flexible direct-current transmission power module Download PDFInfo
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- CN117174511A CN117174511A CN202311447970.1A CN202311447970A CN117174511A CN 117174511 A CN117174511 A CN 117174511A CN 202311447970 A CN202311447970 A CN 202311447970A CN 117174511 A CN117174511 A CN 117174511A
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Abstract
A state light return device and method of a bypass switch of a flexible direct current transmission power module comprises a body, wherein a slot is formed in the body, a baffle is arranged on the body, the baffle is connected with a movable mechanism of the bypass switch, and the baffle can move along the slot of the body under the drive of the movable mechanism; holes communicated with the grooves are formed in the two sides of the grooves on the body and used for installing optical cables, and optical signal passing holes are formed in the baffle plate; when the bypass switch is in an on state, the baffle moves until the optical signal passing holes are aligned with the optical cables on the two sides, and when the bypass switch is in an off state, the baffle moves until the optical signal passing holes are staggered with the optical cables on the two sides; the fiber optic cable is connected to the PMC board. The application directly transmits the optical signal without photoelectric conversion, can completely immunity the interference of electromagnetic field, changes the state of the optical signal according to the state of the bypass switch, and does not cause signal oscillation when the state is changed, so that the optical signal directly returns to the PMC board in different forms, and the reported state of the bypass switch is ensured to be accurate.
Description
Technical Field
The application belongs to the technical field of flexible direct current transmission, and particularly relates to a state light reporting device and method for a bypass switch of a flexible direct current transmission power module.
Background
In the flexible direct current transmission system, a bypass switch is configured in each power module, when the voltage or current state of the module is abnormal, a power module control board (PMC board) can send a bypass instruction to the bypass switch, and the bypass switch can be rapidly turned off and short-circuit an internal submodule, so that the fault is prevented from being further expanded to the whole system. Meanwhile, the state of the bypass switch must be accurately sent to the PMC board, otherwise, the PMC board can judge that the bypass switch is refused to operate, so that the system trips.
The original bypass switch is integrated with a detection circuit on the driving circuit, the detection circuit generates an electric signal, and the electric signal is connected to the micro switch in the bypass switch through a lead and then returned to the detection circuit. When the bypass switch is operated, the micro switch is operated to interrupt the electric signal, and the detection circuit generates an optical signal according to the state of the electric signal and sends the optical signal to the PMC board.
When the micro switch acts, the internal copper sheet is required to be separated by a spring, and the copper sheet can bounce to cause oscillation of an electric signal in the spring separation process, so that signal identification abnormality is easy to cause. In addition, extremely high voltage and current are applied to the power module, the electromagnetic environment is extremely complex, and the electric signal is extremely susceptible to the influence of the electromagnetic environment, so that the electric signal is changed. Once the electrical signal is wrong, the bypass switch is considered to be refused by the PMC board, the system is tripped, the operation of the whole converter valve is influenced, and great economic loss is caused. Meanwhile, the electrical signals are converted into optical signals to be sent to the PMC board, and the optical signals are realized by a separate circuit, so that the cost of the module is increased, and the failure rate of the module is also increased.
The related prior art, such as the publication CN105548871a, discloses an MMC submodule bypass switch state detection device and an MMC submodule bypass switch, which have the following drawbacks: 1) The switch state signal is an electric signal, and hidden danger of being influenced by electromagnetic environment exists. 2) The change of the electric signal depends on the micro-switch inside the switch, and the signal can generate oscillation during the action. 3) The signals of the whole device and the control panel are also electric signals, and hidden dangers influenced by electromagnetic environment exist. 4) If the device is used, the whole structure of the module must be redesigned according to the device, and the original bypass switch cannot be directly replaced.
Disclosure of Invention
The application aims to solve the problems that the state signal of the bypass switch is complex and is easy to interfere in the prior art, and provides a state light reporting device and a state light reporting method for the bypass switch of a flexible direct current transmission power module, wherein the state of the light signal is changed according to the state of the bypass switch, and signal oscillation cannot be caused when the state is changed, so that the light signal is directly returned to a PMC board in different forms to inform the PMC board of the state of the bypass switch at the moment, and meanwhile, the design of an additional photoelectric conversion circuit and an anti-electromagnetic compatibility circuit is avoided.
In order to achieve the above purpose, the present application has the following technical scheme:
in a first aspect, a status light reporting device of a bypass switch of a flexible direct current transmission power module is provided, which comprises a body, wherein a groove is formed in the body, a baffle is arranged in the groove, the baffle is connected with a movable mechanism of the bypass switch, and the baffle can move along the groove of the body under the drive of the movable mechanism; holes communicated with the grooves are formed in the two sides of the grooves on the body, the holes are used for installing optical cables, and the baffle is provided with optical signal passing holes; when the bypass switch is in an on state, the baffle plate moves to a position where the optical signal passing holes are aligned with the optical cables on the two sides, and when the bypass switch is in an off state, the baffle plate moves to a position where the optical signal passing holes are staggered with the optical cables on the two sides; the fiber optic cable is connected to the PMC board.
As a preferable scheme, a plurality of optical signal passing holes are formed in the baffle at intervals, a plurality of pairs of holes communicated with the groove are formed in the body corresponding to each optical signal passing hole at two sides of the groove, and the holes are used for installing a plurality of groups of optical cables; when the bypass switch is in an on state, the baffle plate moves to a position where each optical signal passing hole is aligned with the corresponding optical cables on two sides, and when the bypass switch is in an off state, the baffle plate moves to a position where each optical signal passing hole is dislocated with the corresponding optical cables on two sides.
As a preferable scheme, the baffle is also provided with a strip-shaped hole, the body is provided with a hole between two side wall surfaces of the groove and is provided with a positioning bolt, the positioning bolt passes through the strip-shaped hole of the baffle, and the strip-shaped hole is used for limiting the movable range of the baffle.
As a preferable scheme, a spring is arranged in the groove of the body, and the spring support is arranged at the bottom end of the baffle plate.
As a preferable scheme, the body is arranged in the bypass switch and is connected with the bypass switch through a mounting bolt, and the baffle is connected with a movable mechanism of the bypass switch through a bolt.
As a preferable scheme, the optical cable head of the optical cable uses an MF end head, the MF end head can be tightly installed in a hole formed in the body, and the distance between the end faces of the optical cables at two sides after the installation is less than or equal to 5mm.
As a preferable embodiment, the optical cable uses a POF optical cable having a core diameter of 1mm.
In a second aspect, a state light reporting method for a bypass switch of a flexible direct current transmission power module is provided, including:
a baffle plate provided with an optical signal passing hole is arranged between the two optical cables;
connecting an optical cable with the PMC plate, and connecting a baffle with a movable mechanism of the bypass switch;
when the bypass switch is in an on state, the movable mechanism drives the baffle to move to a position where the optical signal passing holes are aligned with the optical cables on two sides, and the optical signals penetrate through the optical signal passing holes of the baffle to communicate the two optical cables;
when the bypass switch is in an off state, the movable mechanism drives the baffle to move to a position where the optical signal passing holes are staggered with the optical cables on two sides, the optical signals cannot penetrate through the optical signal passing holes of the baffle, and the PMC plate has no signal input.
As a preferred solution, the direction of movement of the shutter is kept perpendicular to the direction of arrangement of the two cables.
As a preferable scheme, a plurality of optical signal passing holes are formed in the baffle at intervals, and a plurality of groups of optical cables are arranged on two sides of the baffle corresponding to each optical signal passing hole; when the bypass switch is in an on state, the movable mechanism drives the baffle to move until each optical signal passing hole is aligned with the corresponding optical cables on two sides, and when the bypass switch is in an off state, the movable mechanism drives the baffle to move until each optical signal passing hole is staggered with the corresponding optical cables on two sides.
Compared with the prior art, the application has at least the following beneficial effects:
the state light return device of the bypass switch of the flexible direct current transmission power module directly transmits the optical signal without photoelectric conversion, can completely immunity any interference of electromagnetic field, and ensures that the return bypass switch state is accurate. The baffle is hard-connected with the movable mechanism of the bypass switch, the movable mechanism directly drives the baffle to act, and the internal optical path of the movable mechanism can be changed according to the movable mechanism of the bypass switch, so that the on and off of an optical signal can be changed, and signal oscillation or delay between the switch action and a state signal can not be caused. The device has small volume and light weight, is a pure mechanical mechanism, does not need to be powered by a power supply, can directly replace the micro switch in the original bypass switch, does not need to redesign or purchase the whole bypass switch, and does not influence the structure and the weight of the power module. The application can directly control the optical signals and return the optical signals to the PMC board without using a circuit board to convert the electrical signals into the optical signals and return the optical signals to the PMC board, thereby reducing the module cost and the failure rate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the following drawings are only some of the drawings of embodiments of the present application, and that other drawings of embodiments may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a status light reporting device according to an embodiment of the application.
FIG. 2 is a cross-sectional view of a status light reporting device according to an embodiment of the application.
FIG. 3 is a schematic diagram illustrating an exemplary embodiment of a status reporting device in an on state of a bypass switch.
FIG. 4 is a schematic diagram illustrating an exemplary embodiment of a status reporting device in an off state of a bypass switch.
FIG. 5 is a schematic cross-sectional view of the device in the open state of the bypass switch during normal operation of the system according to the embodiment of the present application.
FIG. 6 is a schematic circuit diagram of the bypass switch in an ON state during normal operation of the system according to the embodiment of the application.
FIG. 7 is a schematic cross-sectional view of the device in the open state of the bypass switch during abnormal operation of the system according to the embodiment of the present application.
FIG. 8 is a schematic circuit diagram of the bypass switch in an open state during abnormal operation of the system according to the embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application.
Referring to fig. 1 and 2, a status light reporting device of a bypass switch of a flexible dc transmission power module according to an embodiment of the present application includes a body 1, a slot is formed in the body 1, a baffle 2 is installed on the body 1, holes communicating with the slot are formed on two sides of the slot for installing an optical cable 3, an optical signal passing hole is formed in the baffle 2, and the optical cable 3 is connected with a PMC board.
As shown in fig. 3 and 4, the body 1 of the embodiment of the present application is disposed inside the bypass switch 21 and is connected to the bypass switch 21 by a mounting bolt 24, and the shutter 2 is connected to the movable mechanism 22 of the bypass switch 21 by a bolt. The baffle plate 2 can move along the groove of the body 1 under the drive of the moving mechanism 22. The baffle plate 2 is also provided with a strip-shaped hole, the body 1 is provided with holes between two side wall surfaces of the groove and is provided with a positioning bolt 5, the positioning bolt 5 passes through the strip-shaped hole of the baffle plate 2, and the strip-shaped hole limits the movable range of the baffle plate 2. The spring 4 is arranged in the groove of the body 1, and the spring 4 is supported and arranged at the bottom end of the baffle plate 2.
In one possible implementation manner, two optical signal passing holes are spaced apart on the baffle plate 2, two pairs of holes communicated with the grooves are formed on two sides of the groove corresponding to each optical signal passing hole on the body 1 for installing multiple groups of optical cables 3, when the bypass switch 21 is in an on state, the baffle plate 2 moves to a position where each optical signal passing hole is aligned with the corresponding two-side optical cable 3, and when the bypass switch 21 is in an off state, the baffle plate 2 moves to a position where each optical signal passing hole is dislocated with the corresponding two-side optical cable 3.
As shown in fig. 5, when the system is operating normally, the bypass switch 21 is in an on state, the baffle 2 moves to a position where the optical signal passing hole is aligned with the optical cables 3 on both sides, and the circuit structure is shown in fig. 6.
As shown in fig. 7, when the system operates abnormally, the bypass switch 21 is in an off state, the baffle 2 moves to a position where the optical signal passing hole is dislocated from the optical cables 3 on both sides, and the circuit structure is shown in fig. 8.
In one possible embodiment, the cable head of the optical cable 3 uses an MF end, which can be tightly mounted in a hole formed in the body 1, and the distance between the end faces of the optical cables 3 on both sides is equal to or less than 5mm after the mounting.
In one possible embodiment, the optical cable 3 uses a POF cable, where the core diameter of the POF cable is 1mm, so that it is ensured that the optical signal is not lost due to scattering when the distance between the cable heads at both sides is less than or equal to 5mm.
Another embodiment of the present application provides a status light reporting method for a bypass switch of a flexible dc power transmission module, including:
a baffle plate 2 provided with an optical signal passing hole is arranged between the two optical cables 3;
connecting the optical cable 3 with the PMC board, and connecting the baffle plate 2 with the movable mechanism 22 of the bypass switch 21;
when the bypass switch 21 is in an on state, the movable mechanism 22 drives the baffle plate 2 to move to a position where the optical signal passing holes are aligned with the optical cables 3 on two sides, and the optical signals penetrate through the optical signal passing holes of the baffle plate 2 to communicate the two optical cables 3;
when the bypass switch 21 is in an off state, the movable mechanism 22 drives the baffle plate 2 to move to a position where the optical signal passing holes are staggered with the optical cables 3 on two sides, the optical signals cannot pass through the optical signal passing holes of the baffle plate 2, and the PMC plate has no signal input.
In one possible embodiment, the direction of movement of the shutter 2 is kept perpendicular to the direction of arrangement of the two optical cables 3.
In one possible implementation manner, a plurality of optical signal passing holes are formed in the baffle plate 2 at intervals, and a plurality of groups of optical cables 3 are arranged on two sides of the baffle plate 2 corresponding to each optical signal passing hole, when the bypass switch 21 is in an on state, the movable mechanism 22 drives the baffle plate 2 to move until each optical signal passing hole is aligned with the corresponding two-side optical cable 3, and when the bypass switch 21 is in an off state, the movable mechanism 22 drives the baffle plate 2 to move until each optical signal passing hole is dislocated with the corresponding two-side optical cable 3.
As shown in fig. 5, in the on state of the bypass switch 21, the power module operates normally, and the movable mechanism 22 of the bypass switch 21 presses the shutter 2 into the body 1. The optical signal passing holes formed in the baffle plate 2 are just aligned with the optical cables 3 on two sides, at this time, the optical signal can pass through the optical signal passing holes, so that the optical signal is input into the PMC board from the other optical cable 3, and at this time, the PMC board can judge that the bypass switch 21 is in an on state.
As shown in fig. 7, when the bypass switch 21 is turned off and the sub-module is turned off, as shown in fig. 8, the movable mechanism 22 of the bypass switch 21 pulls out the baffle plate 2, the optical signal passing hole formed in the baffle plate 2 is shifted, at this time, the optical signal cannot be transmitted to the optical cable 3 at the other end through the baffle plate 2, and the optical signal cannot be input to the PMC board, and at this time, the PMC board determines that the bypass switch 21 is turned off.
The spring 4 of the state light return device of the bypass switch of the flexible direct current transmission power module has a limiting function, so that the baffle plate 2 can always move perpendicular to the arrangement direction of the two optical cables 3, and the baffle plate 2 is prevented from tilting and colliding with the body 1 or the optical cables 3. The positioning bolt 5 has a positioning function, is inserted from a threaded hole on the body 1, passes through a strip-shaped hole in the middle of the baffle plate 2, can lead the end surface of the baffle plate 2 to be always perpendicular to the optical cable 3, and cannot rotate internally, so that collision with the optical cable 3 is caused.
The front end of the baffle plate 2 is provided with a screw thread with a certain length, a nut 23 can be used for connecting the movable mechanism 22 of the bypass switch 21 by bolts, and the bypass switch 21 synchronously acts with the baffle plate 2 during the action of the bypass switch 21, so that no time delay exists between a return optical signal and the action of the bypass switch 21. At the same time, the baffle plate 2 can be ensured not to bounce in the pulling-out process, so that the signal oscillates.
The state light return device of the bypass switch of the flexible direct current transmission power module is of a pure mechanical structure, and is high in reliability and long in service life. The device can be used for transmitting optical signals, the PMC board directly transmits the optical signals to the device, the device changes the optical path in the device according to the state of the bypass switch, so that the optical signals directly return to the PMC board in different forms, the PMC board is informed of the state of the bypass switch at the moment, and meanwhile, the design of an additional photoelectric conversion circuit and an anti-electromagnetic compatibility circuit is avoided.
The device of the embodiment of the application can change the state of the optical signal according to the state of the bypass switch, and the signal oscillation can not be caused when the state is changed. Meanwhile, the device is provided with multiple paths of optical paths, and can meet the cross communication function of the flexible direct current transmission power module.
The state light return device of the bypass switch of the flexible direct current transmission power module is connected by the optical cable 3, can directly transmit optical signals, changes the internal optical path according to the movable mechanism 22 of the bypass switch 21 so as to change the on and off of the optical signals, and the baffle plate 2 and the movable mechanism 22 are hard connected, and the movable mechanism 22 directly drives the baffle plate 2 to act instead of relying on the elastic force of the spring 4, so that when the bypass switch 21 acts, the baffle plate 2 cannot oscillate due to bouncing, and delay exists between the switch action and the state signals. Because the state signal is an optical signal, any interference of the electromagnetic field can be completely immunized, and the reported switching state is ensured to be accurate. The state light reporting device of the bypass switch of the flexible direct-current transmission power module has small volume and light weight, can directly replace the micro switch in the original bypass switch 21, does not need to redesign or purchase the whole bypass switch 21, does not influence the structure and weight of the power module, can directly control optical signals and return the optical signals to a PMC board, does not need to use a circuit board to convert electric signals into optical signals and return the optical signals to the PMC board, and can reduce the module cost and the failure rate. And the multi-path state signal simultaneous transmission is supported, and the function of cross communication of the flexible direct current transmission power module is satisfied.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. The utility model provides a flexible direct current transmission power module bypass switch's state light repayment device which characterized in that: the device comprises a body (1), wherein a groove is formed in the body (1), a baffle (2) is arranged in the groove, the baffle (2) is connected with a movable mechanism (22) of a bypass switch (21), and the baffle (2) can move along the groove of the body (1) under the drive of the movable mechanism (22); holes communicated with the grooves are formed in the two sides of the grooves on the body (1), the holes are used for installing optical cables (3), and the baffle (2) is provided with optical signal passing holes; when the bypass switch (21) is in an on state, the baffle plate (2) moves to a position where the optical signal passing holes are aligned with the optical cables (3) on two sides, and when the bypass switch (21) is in an off state, the baffle plate (2) moves to a position where the optical signal passing holes are staggered with the optical cables (3) on two sides; the optical cable (3) is connected with the PMC plate.
2. The status light reporting device of claim 1 wherein the flexible dc power module bypass switch is configured to: a plurality of optical signal passing holes are formed in the baffle plate (2) at intervals, a plurality of pairs of holes communicated with the grooves are formed in the two sides of the grooves corresponding to each optical signal passing hole in the body (1) and are used for installing a plurality of groups of optical cables (3); when the bypass switch (21) is in an on state, the baffle plate (2) moves to a position where each optical signal passing hole is aligned with the corresponding two-side optical cables (3), and when the bypass switch (21) is in an off state, the baffle plate (2) moves to a position where each optical signal passing hole is staggered with the corresponding two-side optical cables (3).
3. The status light reporting device of a flexible dc transmission power module bypass switch of claim 1 or 2, wherein: the baffle plate (2) is further provided with a strip-shaped hole, the body (1) is provided with holes between two side wall surfaces of the groove and is provided with positioning bolts (5), the positioning bolts (5) penetrate through the strip-shaped hole of the baffle plate (2), and the strip-shaped hole is used for limiting the movable range of the baffle plate (2).
4. A status light reporting device for a bypass switch of a flexible dc transmission power module as defined in claim 3, wherein: a spring (4) is arranged in the groove of the body (1), and the spring (4) is supported and arranged at the bottom end of the baffle plate (2).
5. The status light reporting device of claim 1 wherein the flexible dc power module bypass switch is configured to: the body (1) is arranged in the bypass switch (21) and is connected with the bypass switch (21) through a mounting bolt (24), and the baffle (2) is connected with a movable mechanism (22) of the bypass switch (21) through a bolt.
6. The status light reporting device of claim 1 wherein the flexible dc power module bypass switch is configured to: the optical cable head of the optical cable (3) uses an MF end head, the MF end head can be tightly installed in a hole formed in the body (1), and the end face distance of the optical cables (3) on two sides after the installation is less than or equal to 5mm.
7. The status light reporting device of claim 6 wherein the flexible dc power module bypass switch is configured to: the optical cable (3) uses a POF optical cable, and the core diameter of the POF optical cable is 1mm.
8. The status light return method of the bypass switch of the flexible direct current transmission power module is characterized by comprising the following steps of:
a baffle plate (2) provided with an optical signal passing hole is arranged between the two optical cables (3);
connecting the optical cable (3) with the PMC plate, and connecting the baffle plate (2) with a movable mechanism (22) of a bypass switch (21);
when the bypass switch (21) is in an on state, the movable mechanism (22) drives the baffle plate (2) to move to a position where the optical signal passing holes are aligned with the optical cables (3) on two sides, and the optical signals penetrate through the optical signal passing holes of the baffle plate (2) to communicate the two optical cables (3);
when the bypass switch (21) is in an off state, the movable mechanism (22) drives the baffle plate (2) to move to a position where the optical signal passing holes are staggered with the optical cables (3) on two sides, and optical signals cannot penetrate through the optical signal passing holes of the baffle plate (2) and no signal is input to the PMC plate.
9. The status light reporting method of the bypass switch of the flexible direct current transmission power module according to claim 8, wherein the moving direction of the baffle plate (2) is kept perpendicular to the arrangement direction of the two optical cables (3).
10. The status light return method of the bypass switch of the flexible direct current transmission power module according to claim 8, characterized in that a plurality of light signal passing holes are formed on the baffle plate (2) at intervals, and a plurality of groups of optical cables (3) are arranged on two sides of the baffle plate (2) corresponding to each light signal passing hole; when the bypass switch (21) is in an on state, the movable mechanism (22) drives the baffle plate (2) to move until each optical signal passing hole is aligned with the corresponding two-side optical cables (3), and when the bypass switch (21) is in an off state, the movable mechanism (22) drives the baffle plate (2) to move until each optical signal passing hole is staggered with the corresponding two-side optical cables (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311447970.1A CN117174511B (en) | 2023-11-02 | 2023-11-02 | State light reporting device and method for bypass switch of flexible direct-current transmission power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311447970.1A CN117174511B (en) | 2023-11-02 | 2023-11-02 | State light reporting device and method for bypass switch of flexible direct-current transmission power module |
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| CN117174511B CN117174511B (en) | 2024-03-01 |
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| US20140153889A1 (en) * | 2012-10-01 | 2014-06-05 | Network Integrity Systems, Inc. | Hardware and Methods for Secure Alarmed Armored Protective Distribution Systems and Management |
| DE102015101608A1 (en) * | 2015-02-04 | 2016-08-18 | Bundesrepublik Deutschland, Vertreten Durch Den Bundesminister Für Wirtschaft Und Energie, Dieser Vertreten Durch Den Präsidenten Der Bundesanstalt Für Materialforschung Und -Prüfung (Bam) | Signal transmission method and apparatus with an optical fiber |
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| CN211786220U (en) * | 2020-04-17 | 2020-10-27 | 李毅 | Microswitch for outputting optical signals |
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| CN116736096A (en) * | 2023-06-06 | 2023-09-12 | 国网北京市电力公司 | Bypass switch switching detection device for flexible direct-current converter valve submodule |
| CN116499660A (en) * | 2023-06-07 | 2023-07-28 | 国网经济技术研究院有限公司 | Water leakage detection device and method for converter valve |
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