CN113805017A - Distributed omnidirectional distribution equipment hidden danger troubleshooting device and method thereof - Google Patents
Distributed omnidirectional distribution equipment hidden danger troubleshooting device and method thereof Download PDFInfo
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- CN113805017A CN113805017A CN202111074445.0A CN202111074445A CN113805017A CN 113805017 A CN113805017 A CN 113805017A CN 202111074445 A CN202111074445 A CN 202111074445A CN 113805017 A CN113805017 A CN 113805017A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a device and a method for troubleshooting hidden dangers of distributed omnidirectional distribution equipment. The invention adopts the pan-tilt structure, adopts the infrared imaging sensor and the ultrasonic monitoring sensor, can more intuitively display the discharge intensity in the detected area, can detect whether the cabinet is provided with a condition of no partial discharge and whether the surrounding insulating medium has a condition of partial overheating caused by strong discharge in time, can clearly know the condition of each monitored node of the distribution equipment by remote monitoring, and is convenient for judging whether the node needs to be maintained or replaced.
Description
Technical Field
The invention relates to the technical field of real-time monitoring of high-voltage power distribution equipment, in particular to a distributed omnidirectional distribution equipment hidden danger troubleshooting device and a method thereof.
Background
Various hidden dangers which cannot be observed by people can appear in the long-term operation process of the electric power distribution equipment, wherein partial discharge and node heating are the most common early-stage accident characteristics, and once the hidden dangers continuously occur, inestimable loss can be caused finally.
The partial discharge phenomenon refers to a discharge phenomenon occurring in a local range under the action of a sufficiently strong electric field when insulation is provided in a high-voltage electrical apparatus. If strong discharge causes the reduction of the insulation strength of the equipment and even causes short circuit of an insulation layer of the equipment, a circuit can not form a circuit loop, and finally interphase discharge or ground discharge is formed to cause tripping or explosion accidents.
1. For example, the Chinese patent discloses a method and a device (application number: CN202011106943.4) for checking the potential safety hazard of power distribution equipment, the method provided by the application obtains the equipment to be checked, the probability of which exceeds a first preset potential safety hazard threshold value, in the power distribution equipment and the position data of the equipment to be checked from a potential safety hazard graph; counting the number of devices to be checked in each potential safety hazard map sub-region; sequencing the sub-regions of the potential safety hazard graphs according to the sequence of the number of the devices to be checked from large to small; according to the sequencing result, whether high-risk equipment to be inspected with potential safety hazard probability exceeding a second preset potential safety hazard threshold exists in each potential safety hazard map sub-region or not is sequentially judged, if yes, a safety risk avoiding action instruction is sent to the high-risk equipment to be inspected, and real-time position data of an inspector is obtained; and sending a checking instruction to a first inspection worker nearest to the high-risk equipment to be checked. The method provided by the application can be used for effectively checking the potential safety hazard of the power distribution equipment in time.
2. For example, the chinese patent discloses a power transmission and distribution equipment hidden danger troubleshooting information management and decision support system (application number: CN201310512700.4), which comprises a data acquisition and processing system, a hidden danger classification early warning system and an equipment hidden danger information publishing and displaying system, which are sequentially connected. The power transmission and distribution equipment hidden danger troubleshooting information management and decision support system can overcome the defects of incomplete analysis, low reliability, poor practicability and the like in the prior art, and has the advantages of complete analysis, high reliability and good practicability.
The high-voltage power distribution equipment in the prior art is mostly cabinet type or box type, and can only patrol and examine and install the internal sensor through the manual work to its monitoring and carry out on-line monitoring, however the inside space of these equipment and narrow and small, adopt single node sampling can not effectual detection go out hidden danger and fault point, adopt the mode of multinode to increase the cost.
Therefore, it is necessary to provide a device and a method for troubleshooting hidden dangers of distributed omni-directional power distribution equipment.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device and a method for checking hidden dangers of distributed omnidirectional power distribution equipment, so as to solve the problems.
The utility model provides a distributing type qxcomm technology distribution equipment hidden danger investigation device, rotates seat, main circuit board, first motor, second motor, steering gear, infrared imaging sensor and ultrasonic wave monitoring sensor including base, first rotation seat, second, first motor and main circuit board are all installed in the base, the output of first motor pass through horizontal rotation mechanism connect in first rotation seat, the center pin of second motor is installed on first rotation seat, the seat suit is rotated at the second outside the motor to the second, infrared imaging sensor and ultrasonic wave monitoring sensor all install on the second rotates the seat, first motor, second motor, infrared imaging sensor and ultrasonic wave monitoring sensor all electricity connect in main circuit board.
Preferably, the main circuit board comprises a logic control module, a signal amplification circuit, a filtering module, a communication module, a network driving module, a holder driving module and a power module, the ultrasonic monitoring sensor is connected with the A/D conversion module sequentially through the signal amplification circuit and the filtering module, the infrared imaging sensor is connected with the image processing module, the image processing module and the A/D conversion module are both connected with the logic control module, the communication module is connected with the logic control module through the network driving module, and the first motor and the second motor are both connected with the logic control module through the holder driving module.
Preferably, the power module provides power for the first motor, the second motor, the logic control module and the communication module respectively.
Preferably, a communication interface and a power interface are arranged outside the base, the communication interface is connected with the communication module, and the power interface is connected with the power module.
Preferably, the communication interface is externally connected with a data gateway through a cable, and the data gateway is connected with the master station through a DTU.
Preferably, the horizontal rotation mechanism comprises a gear and a horizontal steering gear, the gear is mounted on an output shaft of the first motor, the horizontal steering gear is mounted at the bottom of the first rotation seat, and the gear is meshed with the horizontal steering gear.
A method for checking hidden danger of distributed omnidirectional power distribution equipment comprises the following steps:
starting and initializing the module, confirming whether the module is initialized, and prompting exception if not; if so, entering a monitoring and monitoring mode, waiting for a collection instruction, starting scanning and sampling, judging whether partial discharge exists, if so, recording the abnormal first position, if so, still abnormal secondary sampling, sending abnormal information, clearing an abnormal mark, and finishing sampling.
After sampling is finished, further judging whether abnormal position records exist or not, if not, resetting the cradle head, and waiting for a collecting instruction again; if so, starting scanning and sampling and judging whether the local part has high temperature, and if so, recording the abnormal first position; if not, the sampling is finished.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts the pan-tilt structure, so that the equipment is more flexible, the combination of the infrared imaging sensor and the ultrasonic monitoring sensor is adopted, the discharge intensity in the detected area can be more visually displayed, the condition that no partial discharge exists in the cabinet and whether the local overheating condition caused by strong discharge exists in the surrounding insulating medium can be timely detected, the remote video monitoring is realized, the working and maintenance personnel can clearly know the condition of each monitored node of the single equipment only by remote calling without going to the site, and the judgment of whether the node needs to be maintained or replaced is convenient.
Drawings
Fig. 1 is a structural diagram of a hidden danger troubleshooting device of distributed omnidirectional distribution equipment of the invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic view of the present invention in an expanded state;
FIG. 4 is a schematic view of the internal structure of the present invention;
FIG. 5 is a view of a second rotary base of the present invention;
fig. 6 is a structural view of a horizontal rotation mechanism of the present invention;
FIG. 7 is a functional block diagram of the circuit module of the present invention;
FIG. 8 is a schematic diagram of the inspection device of the present invention for inspecting the power distribution equipment;
FIG. 9 is a schematic diagram of the investigation method of the present invention.
Reference numbers in the figures: 1. a base; 2. a first rotating base; 3. a second rotating base; 4. a main circuit board; 5. a first motor; 6. a second motor; 7. a troubleshooting device; 8. an infrared imaging sensor; 9. an ultrasonic monitoring sensor; 10. a horizontal rotation mechanism; 11. a gear; 12. a horizontal steering gear; 101. a communication interface; 102. a power interface; 31. an upper shell; 32. a lower case; 401. a logic control module; 402. a signal amplification circuit; 403. a filtering module; 404. an electrical power distribution device; 405. a communication module; 406. a network driver module; 407. the holder driving module; 408. a power supply module; 409. an A \ D conversion module; 410. and an image processing module.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 and fig. 2 to 9, a distributed omnidirectional power distribution equipment hidden danger investigation device includes a base 1, a first rotating base 2, a second rotating base 3, a main circuit board 4, a first motor 5, a second motor 6, an infrared imaging sensor 8 and an ultrasonic monitoring sensor 9, the first motor 5 and the main circuit board 4 are both arranged in the base 1, the output end of the first motor 5 is connected to the first rotating seat 2 through a horizontal rotating mechanism 10, the central shaft of the second motor 6 is arranged on the first rotating seat 2, the second rotating seat 3 is sleeved outside the second motor 6, the infrared imaging sensor 8 and the ultrasonic monitoring sensor 9 are both arranged on the second rotating seat 3, the first motor 5, the second motor, the infrared imaging sensor 8 and the ultrasonic monitoring sensor 9 are electrically connected to the main circuit board 4.
Wherein the second rotatable mount 3 comprises an upper shell 31 and a lower shell 32.
Further, the main circuit board 4 includes a logic control module 401, a signal amplification circuit 402, a filtering module 403, a communication module 405, a network driving module 406, a cradle head driving module 407, and a power module 408, the ultrasonic monitoring sensor 9 is connected to an a/D conversion module 409 via the signal amplification circuit 402 and the filtering module 03 in sequence, the infrared imaging sensor 8 is connected to an image processing module 410, the image processing module 410 and the a/D conversion module 409 are both connected to the logic control module 401, the communication module 405 is connected to the logic control module 401 via the network driving module 406, and the first motor 5 and the second motor 6 are both connected to the logic control module 401 via the cradle head driving module 407.
Further, the power module 408 provides power to the first motor 5, the second motor, the logic control module 401 and the communication module 405, respectively.
Further, a communication interface 101 and a power interface 102 are arranged outside the base 1, the communication interface 101 is connected with a communication module 405, and the power interface 102 is connected with a power module 408.
Further, the outside of the communication interface 101 is connected to a data gateway through a cable, and the data gateway is connected to the master station through a DTU.
Further, the horizontal rotation mechanism 10 comprises a gear 11 and a horizontal steering gear 12, the gear 11 is installed on an output shaft of the first motor 5, the horizontal steering gear 12 is installed at the bottom of the first rotation seat 2, and the gear 11 is meshed with the horizontal steering gear 12.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts a tripod head structure (the first motor 5 and the second motor 6 can enable the infrared imaging sensor 8 and the ultrasonic monitoring sensor 8 to rotate by 360 degrees), so that the equipment is more flexible, the infrared imaging sensor 8 and the ultrasonic monitoring sensor are combined, the discharge intensity in a detected area can be more visually displayed, whether partial discharge exists in a cabinet or not and whether partial overheating conditions of surrounding insulating media caused by strong discharge exist or not can be timely detected, remote video monitoring is realized, a working maintenance worker does not need to arrive at the site, the conditions of each monitored node of the single distribution equipment can be clearly known only through remote calling, and whether maintenance or node replacement is needed or not is conveniently judged; the number of the installation nodes is small, the monitoring range is large, and the potential safety hazard of the equipment can be sensed in advance and fault points can be found in time.
The method for checking the hidden danger of the distributed omnidirectional power distribution equipment comprises the following steps:
starting and initializing the module, confirming whether the module is initialized, and prompting exception if not; if so, entering a monitoring and monitoring mode, waiting for a collection instruction, starting scanning and sampling, judging whether partial discharge exists, if so, recording the abnormal first position, if so, still abnormal secondary sampling, sending abnormal information, clearing an abnormal mark, and finishing sampling.
After sampling is finished, further judging whether abnormal position records exist or not, if not, resetting the cradle head, and waiting for a collecting instruction again; if so, starting scanning and sampling and judging whether the local part has high temperature, and if so, recording the abnormal first position; if not, the sampling is finished.
The working principle is as follows:
the troubleshooting device 7 is installed in the electric power distribution equipment 404, the troubleshooting device 7 is connected with a data gateway through a cable, and the data gateway is connected with a main station through a DTU (a wireless terminal device which is specially used for converting serial port data into IP data or converting the IP data into the serial port data and transmitting the serial port data through a wireless communication network); when the device is used, the vibration which can be impacted when partial discharge occurs generates sound, the GIS (electrical insulation switch equipment) partial discharge can generate sound waves including longitudinal waves, transverse waves and surface waves, the ultrasonic monitoring sensor 9 can collect the generated sound waves and convert sound signals into electric signals, then the electric signals are filtered and amplified, and finally the electric signals are converted into digital signals through the AD conversion module 409, the discharge emitting positions can be accurately positioned through a series of preset processing calculation modes due to different waveforms and different phases after being transmitted in a medium and the rotating angles of the pan-tilt (the first motor 5 and the second motor 6), the infrared imaging sensors 8 on the same horizontal line scan infrared thermal images of objects (cables and cable connectors) and focus on a unit or a light splitting detector, and the infrared imaging sensors 8 convert infrared radiation energy into electric signals, the infrared thermal image is amplified and transmitted to the logic control module 401 through the processing module 410 to be displayed, and hidden dangers and fault points are further judged through a sound-light combined method.
Wherein two motors (first motor 5 and second motor 6) have the angle location function, the motor can be according to the automatic positioning of position command and remove the assigned position, two motors (first motor 5 and second motor 6) one of them control horizontal angle's removal vertical level of control reciprocates, when receiving upper and lower action voltage, first motor 5 rotates, it is rotatory to drive the probe storehouse through horizontal rotation mechanism 10, when receiving left and right sides action voltage, second motor 6 rotates, it is rotatory to drive the base through reduction gear, drive outside cloud platform through two gears and rotate, 360 all-round rotations of cloud platform can be realized.
The ultrasonic monitoring sensor 9 is a sensor capable of receiving ultrasonic signals, is connected with the control circuit through a signal seat, and extends out of the other end of the ultrasonic monitoring sensor through a holder; the cradle head controls the omnibearing scanning through the motor to position the range of the partial discharge when the partial discharge occurs in the insulating medium of the equipment, and then the specific position of the partial discharge is positioned more accurately by scanning again in the range.
The partial discharge is a sign of local overheating and aging of electrical and mechanical elements, so that an infrared imaging sensor 8 is added, the infrared imaging sensor and the electrical and mechanical elements are added together to form an audio-visual function, the temperature conditions of the partial discharge position and the surrounding area can be more intuitively mastered, the equipment is convenient to maintain and replace, the infrared imaging sensor 8 is connected with the main circuit board 4, and one end of the infrared imaging sensor extends out through the cradle head and is on the same straight line level with the ultrasonic monitoring sensor 9.
All install investigation device 7 in each electric power distribution equipment 404, infrared imaging sensor 8 and ultrasonic wave monitoring sensor 9 are all installed to every investigation device 7, all connect data gateway with a plurality of infrared imaging sensor 8 and ultrasonic wave monitoring sensor 9, data gateway passes through DTU and connects the main website, if certain electric power distribution equipment 404 has the hidden danger of discharging (the hidden danger of discharging takes place more easily in the connector department between two cables), infrared imaging sensor 8 and ultrasonic wave monitoring sensor 9 pass through data gateway, DTU transmits the monitor to the main website, the alarm information of the monitor of patrolling and examining personnel's accessible main website knows which some electric power distribution equipment 404 have the influence of discharging, and make measures.
Wherein, a monitor is arranged on the main station, and the monitor displays the sound wave intensity signal and the position signal which are fed back by the ultrasonic monitoring sensor 9 and also displays the infrared scanning image of the infrared imaging sensor 8.
The horizontal and vertical rotatable 360-degree holder is added under the condition that the structure of the original ultrasonic detector is not changed, the use is convenient and flexible, the occupied position of the holder is reduced, the discharge node in a narrow power distribution equipment space can be more accurately positioned, compared with the traditional equipment ultrasonic partial discharge monitoring equipment, an infrared imaging sensor 8 is further arranged in the scheme, the original single ultrasonic detection mode is changed, the infrared imaging technology is combined, the holder and the infrared imaging technology are added together to form an audio-visual function, the temperature conditions of the partial discharge position and the surrounding area can be more intuitively mastered, the investigation device 7 is directly arranged in the power distribution equipment 404, and the life safety problem of workers can also be reduced; two data transmission modes, namely wired network transmission and wireless network transmission, are provided, and a user performs online video control on a background and a direct calling device to realize remote monitoring.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The utility model provides a distributing type qxcomm technology distribution equipment hidden danger investigation device which characterized in that: comprises a base (1), a first rotating seat (2), a second rotating seat (3), a main circuit board (4), a first motor (5), a second motor (6), an infrared imaging sensor (8) and an ultrasonic monitoring sensor (9), the first motor (5) and the main circuit board (4) are both arranged in the base (1), the output end of the first motor (5) is connected to the first rotating seat (2) through a horizontal rotating mechanism (10), the central shaft of the second motor (6) is arranged on the first rotating seat (2), the second rotating seat (3) is sleeved outside the second motor (6), the infrared imaging sensor (8) and the ultrasonic monitoring sensor (9) are both arranged on the second rotating seat (3), the first motor (5), the second motor (6), the infrared imaging sensor (8) and the ultrasonic monitoring sensor (9) are electrically connected to the main circuit board (4).
2. The apparatus of claim 1, wherein the apparatus for troubleshooting potential hazards of distributed omni-directional power distribution equipment comprises: the main circuit board (4) comprises a logic control module (401), a signal amplification circuit (402), a filtering module (403), a communication module (405), a network driving module (406), a holder driving module (407) and a power supply module (408), the ultrasonic monitoring sensor (9) is connected with an A/D conversion module (409) sequentially through a signal amplification circuit (402) and a filtering module (403), the infrared imaging sensor (8) is connected with an image processing module (410), the image processing module (410) and the A/D conversion module (409) are both connected with a logic control module (401), the communication module (405) is connected with the logic control module (401) through a network driving module (406), the first motor (5) and the second motor (6) are connected with the logic control module (401) through the holder driving module (407).
3. The apparatus of claim 2, wherein the apparatus for troubleshooting potential hazards of distributed omni-directional power distribution equipment comprises: the power module (408) respectively provides power for the first motor (5), the second motor (6), the logic control module (401) and the communication module (405).
4. The apparatus of claim 1, wherein the apparatus for troubleshooting potential hazards of distributed omni-directional power distribution equipment comprises: the base (1) is externally provided with a communication interface (101) and a power interface (102), the communication interface (101) is connected with a communication module (405), and the power interface (102) is connected with a power module (408).
5. The apparatus of claim 4, wherein the apparatus for troubleshooting potential hazards of distributed omni-directional power distribution equipment comprises: the communication interface (101) is externally connected with a data gateway through a cable, and the data gateway is connected with the main station through a DTU (data transfer unit).
6. The apparatus of claim 1, wherein the apparatus for troubleshooting potential hazards of distributed omni-directional power distribution equipment comprises: horizontal rotary mechanism (10) include gear (11) and horizontal steering gear (12), the output shaft at first motor (5) is installed in gear (11), the bottom at first rotation seat (2) is installed in horizontal steering gear (12), gear (11) and horizontal steering gear (12) meshing.
7. The method for troubleshooting the hidden danger troubleshooting device of the distributed omnidirectional distribution equipment as recited in any one of claims 1 to 6, wherein: the method comprises the following steps:
starting and initializing the module, confirming whether the module is initialized, and prompting exception if not; if so, entering a monitoring and monitoring mode, waiting for a collection instruction, starting scanning and sampling, judging whether partial discharge exists, if so, recording the abnormal first position, if so, still abnormal secondary sampling, sending abnormal information, clearing an abnormal mark, and finishing sampling.
8. The troubleshooting method of the hidden danger troubleshooting apparatus of the distributed omnidirectional distribution equipment as recited in claim 7, wherein: after sampling is finished, further judging whether abnormal position records exist or not, if not, resetting the cradle head, and waiting for an acquisition instruction again; if so, starting scanning and sampling and judging whether the local part has high temperature, and if so, recording the abnormal first position; if not, the sampling is finished.
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| CN202111074445.0A CN113805017A (en) | 2021-09-14 | 2021-09-14 | Distributed omnidirectional distribution equipment hidden danger troubleshooting device and method thereof |
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| CN202111074445.0A CN113805017A (en) | 2021-09-14 | 2021-09-14 | Distributed omnidirectional distribution equipment hidden danger troubleshooting device and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114844222A (en) * | 2022-06-08 | 2022-08-02 | 科畅电气有限公司 | Reactive compensation monitoring short message alarm system |
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2021
- 2021-09-14 CN CN202111074445.0A patent/CN113805017A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114844222A (en) * | 2022-06-08 | 2022-08-02 | 科畅电气有限公司 | Reactive compensation monitoring short message alarm system |
| CN114844222B (en) * | 2022-06-08 | 2024-07-19 | 科畅电气有限公司 | Reactive compensation monitoring short message alarm system |
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