Device for monitoring state of transmission mechanism of GIS (Gas Insulated Switchgear) disconnecting switch and evaluation method

Abstract

The invention discloses a device for monitoring the state of a GIS disconnecting switch transmission mechanism and an evaluation method.The device comprises a disconnecting switch main transmission rod and a disconnecting switch main transmission rod connecting piece which are connected, the disconnecting switch main transmission rod is provided with a main transmission rod bevel gear, and the main transmission rod bevel gear is in meshed connection with a split-phase transmission gear; one end of the isolating switch main transmission rod is fixedly connected with an isolating switch moving contact transmission rod, the other end of the isolating switch main transmission rod is connected with an isolating switch contact, the isolating switch main transmission rod is provided with a first Hall sensor, a first pulse voltage signal is generated and output when the isolating switch main transmission rod rotates, and the isolating switch moving contact transmission rod is provided with a second Hall sensor; when the disconnecting switch moving contact transmission rod rotates, a second pulse voltage signal is generated and output, the disconnecting switch main transmission rod connecting piece, the disconnecting switch main transmission rod and the main transmission rod bevel gear rotate synchronously, and the operation condition of the disconnecting switch transmission mechanism is accurately evaluated through combined monitoring analysis of the head end and the tail end.

Description

Technical Field

[0001] The present application relates to the technical field of GIS disconnector status monitoring, and in particular to a device and an evaluation method for monitoring the status of a GIS disconnector transmission mechanism. Background Art

[0002] GIS disconnectors play a vital role in power systems, isolating power and performing switching operations. The correct three-phase operation and synchronization of the disconnectors directly impact the safe and stable operation of GIS equipment and the power system. Improper disconnector operation can lead to problems such as arc reignition, phase loss, or arc discharge. In severe cases, this can damage equipment and even cause power outages.

[0003] In related technologies, the main methods for monitoring the synchronization status of GIS disconnectors include mechanical travel monitoring and electrical parameter monitoring. The mechanical travel monitoring method generally involves installing a displacement sensor on the disconnector's main transmission mechanism, which is susceptible to reduced reliability due to mechanical wear and tear, and the displacement sensor cannot monitor the travel of each phase. The electrical parameter monitoring method primarily indirectly determines the disconnector's operating status by monitoring parameters such as current and voltage, but cannot provide pre-emptive monitoring during device operation.

[0004] Based on the difficulties of existing technologies, a more accurate and reliable monitoring method is needed to monitor the three-phase action synchronization status of the equipment during the operation of the GIS disconnector and evaluate the operating status of the corresponding disconnector transmission mechanism. Summary of the Invention

[0005] In view of the above problems, the present application provides a device and evaluation method for monitoring the status of the GIS disconnector transmission mechanism, so as to provide a more accurate and reliable monitoring device and judge the operating status of the disconnector transmission mechanism during equipment operation.

[0006] In a first aspect, an embodiment of the present application provides a device for monitoring the state of a transmission mechanism of a GIS isolating switch, the device for monitoring the state of a transmission mechanism of a GIS isolating switch comprising:

[0007] The connected isolating switch main transmission rod and isolating switch main transmission rod connecting piece, the isolating switch main transmission rod is equipped with a main transmission rod bevel gear, the main transmission rod bevel gear is meshed with a phase transmission gear, one end of the phase transmission gear is fixedly connected to the isolating switch moving contact transmission rod, and the other end is connected to the GIS isolating switch contact, the isolating switch main transmission rod is equipped with a first Hall sensor, the first Hall sensor is used to generate and output a first pulse voltage signal when the isolating switch main transmission rod rotates, the isolating switch moving contact transmission rod is equipped with a second Hall sensor, the second Hall sensor is used to generate and output a second pulse voltage signal when the isolating switch moving contact transmission rod rotates, the isolating switch main transmission rod connecting piece, the isolating switch main transmission rod, and the main transmission rod bevel gear rotate synchronously.

[0008] In some embodiments, the isolating switch moving contact transmission rod is plugged into the phase-splitting transmission gear, and the second Hall sensor is sleeved on the isolating switch moving contact transmission rod.

[0009] In some embodiments, one end of the isolating switch main transmission rod connecting piece is fixedly connected to the isolating switch main transmission rod, and the other end of the isolating switch main transmission rod connecting piece is connected to the rotating shaft of the GIS isolating switch operating motor.

[0010] In some embodiments, when the phase transmission gear rotates, it drives the disconnector moving contact transmission rod to rotate, thereby driving the movement of the GIS disconnector contact.

[0011] In some embodiments, the first Hall sensor is sleeved on the main transmission rod of the isolating switch, and the first Hall sensor is installed at a fixed connection position between the main transmission rod connecting piece of the isolating switch and the main transmission rod of the isolating switch.

[0012] In some embodiments, the phase-splitting transmission gear, the isolating switch moving contact transmission rod and the first Hall sensor constitute a phase-splitting transmission device, and the phase-splitting transmission device is arranged between adjacent isolating switch main transmission rod connectors.

[0013] In some embodiments, the installation ratio of the phase-splitting transmission device, the isolating switch main transmission rod connector, the isolating switch main transmission rod and the first Hall sensor is 3:3:1:1.

[0014] In some embodiments, the Hall sensor includes: a permanent magnetic element and a permanent magnetic element mounting member located inside the Hall sensor, and a Hall element and a Hall element mounting member located outside the Hall sensor.

[0015] In a second aspect, based on the device for monitoring the status of the GIS disconnector transmission mechanism of the first aspect, the embodiment of the present application further provides an evaluation method, including:

[0016] When the GIS disconnector is opened or closed, the disconnector main transmission rod connector, the disconnector main transmission rod, and the main transmission rod bevel gear rotate synchronously to obtain a first electrical signal output by the first Hall sensor;

[0017] The bevel gear of the main transmission rod drives the phase transmission gear, and the movable contact transmission rod of the disconnector rotates to obtain the second electrical signal output by the second Hall sensor on each phase of the disconnector;

[0018] The state of the GIS disconnector transmission mechanism is evaluated based on the first electrical signal and the second electrical signal.

[0019] In some embodiments, in the evaluation method, evaluating the state of the GIS disconnector transmission mechanism based on the first electrical signal and the second electrical signal includes:

[0020] Determining first monitoring parameters of the first electrical signal and the second electrical signal, wherein the first monitoring parameters include: a three-phase pulse signal interval, a main transmission pulse signal interval, and a start and end time of the pulse signal of the main transmission and each phase;

[0021] If the intervals of each phase in the three-phase pulse signal are equal, the intervals of the main transmission pulse signal are equal, and the start and end times of the pulse signals of the main transmission and each phase are equal, it is determined that the isolating switch transmission mechanism is normal; otherwise, it is determined that the isolating switch transmission mechanism is abnormal;

[0022] Determining second monitoring parameters of the first electrical signal and the second electrical signal, wherein the second monitoring parameters include: a ratio of the number of main transmission signals to the number of signals of each phase, and an interval of a phase-splitting pulse signal;

[0023] When the ratio of the number of main transmission signals to the number of signals of each phase is equal, the transmission mechanism is determined to be normal; otherwise, the transmission mechanism is determined to be abnormal; when the intervals of the phase pulse signals are not equal, it is determined that there is an abnormality in the gears of the transmission mechanism.

[0024] The device and evaluation method for monitoring the status of a GIS disconnector transmission mechanism provided in the embodiments of the present application have the following advantages:

[0025] 1. The first Hall effect sensor and the second Hall effect sensor are correspondingly distributed to monitor the rotation of the isolating switch transmission rod and the moving contact transmission rod, and the action of the isolating switch transmission mechanism is monitored and evaluated in real time, effectively improving the intrinsic safety level of the equipment.

[0026] 2. It adopts non-contact monitoring method, and the rotating parts are passive components, which has high reliability and does not affect the structure of the GIS disconnector transmission mechanism.

[0027] 3. Using multiple sets of sensors for comparative analysis can improve the accuracy of equipment status judgment and provide early warning of transmission mechanism failures.

[0028] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Hereinafter, the present application will be described in more detail based on embodiments with reference to the accompanying drawings.

[0030] Figure 1 A schematic diagram of the structure of an exemplary device for monitoring the state of a transmission mechanism of a GIS disconnector proposed in one embodiment of the present application is shown;

[0031] Figure 2 A partial exploded structural diagram of an exemplary device for monitoring the state of a GIS disconnector transmission mechanism, proposed in one embodiment of the present application, is shown;

[0032] Figure 3 FIG2 shows a schematic diagram of an exemplary Hall sensor structure proposed in an embodiment of the present application;

[0033] Figure 4 FIG2 shows a schematic diagram of an exemplary Hall sensor output signal proposed in an embodiment of the present application;

[0034] Figure 5 A schematic diagram showing signal comparison of various parts of an exemplary device proposed in one embodiment of the present application during normal operation is shown;

[0035] Figure 6 An exemplary transmission mechanism state analysis logic diagram proposed in one embodiment of the present application is shown;

[0036] Figure 7 Another exemplary transmission mechanism state analysis logic diagram proposed in an embodiment of the present application is shown.

[0037] Figure numerals: 1. Main transmission rod connector of disconnector; 2. Main transmission rod of disconnector; 3. Bevel gear of main transmission rod; 4. Phase transmission gear; 5. Transmission rod of disconnector moving contact; 6. First Hall sensor; 7. Second Hall sensor. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0039] In related technologies, the main methods for monitoring the synchronization status of GIS disconnectors include mechanical travel monitoring and electrical parameter monitoring. The mechanical travel monitoring method generally involves installing a displacement sensor on the disconnector's main transmission mechanism, which is susceptible to reduced reliability due to mechanical wear and tear, and the displacement sensor cannot monitor the travel of each phase. The electrical parameter monitoring method primarily indirectly determines the disconnector's operating status by monitoring parameters such as current and voltage, but cannot provide pre-emptive monitoring during device operation.

[0040] In response to existing problems, the applicant has developed a device and evaluation method for monitoring the status of the GIS disconnector transmission mechanism. This device utilizes Hall sensors to jointly monitor and analyze the head and tail ends of the GIS disconnector transmission mechanism, comparing and analyzing the voltage pulse information collected from the head and tail ends to determine the operating status of the disconnector transmission mechanism. Simultaneously, a horizontal comparison and analysis method is performed on the voltage pulse signals collected from the three phases of the GIS disconnector transmission mechanism, enabling effective and accurate evaluation of the transmission mechanism status. This method provides a non-mechanical monitoring method for the transmission mechanism that can be combined with mechanical monitoring to form a multi-mode, dual monitoring method. The device and evaluation method for monitoring the status of the GIS disconnector transmission mechanism are described in detail in subsequent embodiments.

[0041] The following describes the application scenarios of the device for monitoring the status of the transmission mechanism of a GIS disconnector provided in the embodiments of the present application:

[0042] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of an exemplary device structure for monitoring the state of a GIS disconnector transmission mechanism provided in an embodiment of the present application. Figure 2 The following is a partial exploded structural diagram of an exemplary device for monitoring the state of a GIS disconnector transmission mechanism, wherein:

[0043] This application sets a set of Hall sensors on the main transmission rod of the GIS disconnector, and sets a set of Hall sensors on the three-phase transmission rods of the disconnector respectively, to measure and compare the rotation conditions of the main transmission rod and the phase transmission rod of the disconnector, so as to analyze and judge the operation status of the equipment.

[0044] See Figure 1 and Figure 2 , one end of the isolating switch main transmission rod connector 1 in the device is fixedly connected to the isolating switch main transmission rod 2, and the other end is connected to the rotating shaft of the GIS isolating switch operating motor;

[0045] When the operating motor of the GIS disconnector rotates, it drives the disconnector main transmission rod connector 1, the disconnector main transmission rod 2, and the main transmission rod bevel gear 3 installed on the disconnector main transmission rod 2 to rotate synchronously;

[0046] In the device, the main transmission rod bevel gear 3 is meshed with the phase transmission gear 4 respectively. When the main transmission rod bevel gear 3 rotates, it will drive the phase transmission gear 4 to rotate synchronously.

[0047] In the device, one end of the isolating switch moving contact transmission rod 5 is fixed to the phase transmission gear 4, and the other end is connected to the GIS isolating switch moving contact;

[0048] When the phase transmission gear 4 in the device rotates, it drives the isolating switch moving contact transmission rod 5 to rotate, thereby driving the movement of the isolating switch moving contact;

[0049] A set of Hall sensors 6 (adapted to the main transmission rod) is installed on the main transmission rod 2 of the isolating switch. When the main transmission rod 2 of the isolating switch rotates, the Hall sensors can generate and output pulse voltage signals.

[0050] See Figure 3 , a schematic diagram of an exemplary Hall sensor structure, Figure 3 In the embodiment, the Hall sensor includes: a permanent magnetic element 6-2 and a permanent magnetic element mounting member 6-3 located inside the Hall sensor, and a Hall element 6-1 and a Hall element mounting member 6-4 located outside the Hall sensor.

[0051] Three sets of second Hall sensors 7 (adapted to the phase-split transmission rods) are respectively installed on the isolating switch moving contact transmission rods 5 of the three phases of the isolating switch. When the isolating switch moving contact transmission rods 5 rotate, each set of Hall sensors can output a group of pulse voltage signals.

[0052] The specific working method is that when the GIS disconnector is opened or closed, the disconnector main transmission rod connector 1, the disconnector main transmission rod 2, and the main transmission rod bevel gear 3 rotate synchronously, the first Hall sensor 6 outputs a set of electrical signals, the main transmission rod bevel gear 3 drives the phase transmission gear 4 and the disconnector moving contact transmission rod 5 to rotate, and the second Hall sensor 7 (adapted to the phase transmission rod) on each phase of the disconnector outputs a set of electrical signals respectively.

[0053] The present application also provides an evaluation method, which is applied to a device for monitoring the status of a GIS disconnector transmission mechanism. The evaluation method includes:

[0054] S1: When the GIS disconnector is opened or closed, the main transmission rod connector, the main transmission rod, and the bevel gear of the main transmission rod rotate synchronously, and the first electrical signal output by the first Hall sensor is obtained;

[0055] S2: The bevel gear of the main transmission rod drives the phase transmission gear, and the movable contact transmission rod of the disconnector rotates to obtain the second electrical signal output by the second Hall sensor on each phase of the disconnector;

[0056] S3: Evaluate the state of the GIS disconnector transmission mechanism based on the first electrical signal and the second electrical signal.

[0057] Specifically, the status evaluation of the isolating switch transmission mechanism is as follows:

[0058] See Figure 4 , Figure 4 This is an exemplary schematic diagram of the Hall sensor output signal provided by this application. When the signal output by the Hall sensor is uniform and the pulse signal repetition period is basically consistent, it indicates that the transmission mechanism structure is normal and the transmission is reliable. Figure 4 As shown in the upper middle part, when there is a difference in the signal pulse signal period output by the Hall sensor, it can be inferred that the gear may be loose or the gear may be missing. Figure 4 Shown in the lower middle part.

[0059] See Figure 5 , Figure 5 This is a schematic diagram showing comparison of signals at various parts of an exemplary device during normal operation according to an embodiment of the present application. Figure 5 middle:

[0060] When the GIS disconnector transmission mechanism is in normal condition and the disconnector is opening and closing, the main drive shaft signal and the signals on each phase should be in the same time period. The ratio of the main drive shaft signal pulse number to the signal pulse number on each phase should be equal.

[0061] In some embodiments, the state of the GIS disconnector transmission mechanism is evaluated based on the first electrical signal and the second electrical signal in S3, including S31 to S34.

[0062] See Figure 6 , Figure 6 This is an exemplary transmission mechanism state analysis logic diagram proposed in one embodiment of the present application, wherein the specific logic judgment and evaluation steps are as follows:

[0063] S31: Determine first monitoring parameters of the first electrical signal and the second electrical signal, wherein the first monitoring parameters include: three-phase pulse signal interval, main drive pulse signal interval, and start and end time of the main drive and each phase pulse signal;

[0064] S32: When the intervals of each phase in the three-phase pulse signal are equal, the intervals of the main transmission pulse signal are equal, and the start and end times of the pulse signals of the main transmission and each phase are equal, it is determined that the isolating switch transmission mechanism is normal; otherwise, it is determined that the isolating switch transmission mechanism is abnormal.

[0065] See Figure 6 , Figure 6 This is another exemplary transmission mechanism state analysis logic diagram proposed in an embodiment of the present application, wherein the specific logic judgment and evaluation steps are as follows:

[0066] S33: Determine second monitoring parameters of the first electrical signal and the second electrical signal, wherein the second monitoring parameters include: a ratio of the number of main transmission signals to the number of signals of each phase, and an interval of a phase-splitting pulse signal;

[0067] S34: When the ratio of the number of main transmission signals to the number of signals of each phase is equal, the transmission mechanism is determined to be normal; otherwise, the transmission mechanism is determined to be abnormal; when the intervals of the phase pulse signals are not equal, it is determined that there is an abnormality in the gears of the transmission mechanism.

[0068] In summary, the present application provides a device and evaluation method for monitoring the status of the GIS disconnector transmission mechanism, which uses a Hall sensor to monitor the rotation of the disconnector transmission rod and the moving contact transmission rod, and performs real-time monitoring and evaluation of the operation of the disconnector transmission mechanism, effectively improving the intrinsic safety level of the equipment. It adopts a non-contact monitoring method, and the rotating parts are passive components with high reliability, which does not affect the structure of the GIS disconnector transmission mechanism. It uses multiple groups of sensors for comparative analysis, which can improve the accuracy of equipment status judgment, provide early warning of transmission mechanism failures, provide a more accurate and reliable monitoring method, and realize the evaluation of the operating status of the disconnector transmission mechanism.

[0069] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for monitoring the state of a GIS disconnector transmission mechanism, characterized in that: The device includes a connected isolating switch main transmission rod and an isolating switch main transmission rod connecting piece, a main transmission rod bevel gear is installed on the isolating switch main transmission rod, and the main transmission rod bevel gear is meshedly connected with a phase-splitting transmission gear, one end of the phase-splitting transmission gear is fixedly connected to the isolating switch moving contact transmission rod, and the other end is connected to the GIS isolating switch contact, the isolating switch main transmission rod is installed with a first Hall sensor, the first Hall sensor is used to generate and output a first pulse voltage signal when the isolating switch main transmission rod rotates, the isolating switch moving contact transmission rod is installed with a second Hall sensor, the second Hall sensor is used to generate and output a second pulse voltage signal when the isolating switch moving contact transmission rod rotates, the isolating switch main transmission rod connecting piece, the isolating switch main transmission rod and the main transmission rod bevel gear rotate synchronously.

2. The device for monitoring the state of the transmission mechanism of the GIS disconnector according to claim 1 is characterized in that: The isolating switch moving contact transmission rod is plugged into the phase-splitting transmission gear, and the second Hall sensor is sleeved on the isolating switch moving contact transmission rod.

3. The device for monitoring the state of the transmission mechanism of the GIS disconnector according to claim 1 is characterized in that: One end of the isolating switch main transmission rod connecting piece is fixedly connected to the isolating switch main transmission rod, and the other end of the isolating switch main transmission rod connecting piece is connected to the rotating shaft of the GIS isolating switch operating motor.

4. The device for monitoring the state of the transmission mechanism of the GIS disconnector according to claim 1, characterized in that: When the phase-splitting transmission gear rotates, it drives the isolating switch moving contact transmission rod to rotate, thereby driving the movement of the GIS isolating switch contact.

5. The device for monitoring the state of the transmission mechanism of the GIS disconnector according to claim 1 is characterized in that: The first Hall sensor is sleeved on the main transmission rod of the isolating switch, and the first Hall sensor is installed at a fixed connection position between the main transmission rod connecting piece of the isolating switch and the main transmission rod of the isolating switch.

6. The device for monitoring the state of the transmission mechanism of the GIS disconnector according to claim 1, characterized in that: The phase-splitting transmission gear, the isolating switch moving contact transmission rod and the first Hall sensor constitute a phase-splitting transmission device, and the phase-splitting transmission device is arranged between adjacent isolating switch main transmission rod connecting pieces.

7. The device for monitoring the state of the transmission mechanism of the GIS disconnector according to claim 6, characterized in that: The installation ratio of the phase-splitting transmission device, the isolating switch main transmission rod connecting piece, the isolating switch main transmission rod and the first Hall sensor is 3:3:1:

1.

8. The device for monitoring the state of the transmission mechanism of the GIS disconnector according to claim 1, characterized in that: The Hall sensor includes: a permanent magnetic element and a permanent magnetic element mounting component located inside the Hall sensor, and a Hall element and a Hall element mounting component located outside the Hall sensor.

9. An evaluation method using the device for monitoring the state of a GIS disconnector transmission mechanism according to any one of claims 1 to 8, characterized in that: The evaluation method includes: When the GIS disconnector is opened or closed, the disconnector main transmission rod connector, the disconnector main transmission rod, and the main transmission rod bevel gear rotate synchronously to obtain a first electrical signal output by the first Hall sensor; The bevel gear of the main transmission rod drives the phase transmission gear, and the movable contact transmission rod of the disconnector rotates to obtain the second electrical signal output by the second Hall sensor on each phase of the disconnector; The state of the GIS disconnector transmission mechanism is evaluated based on the first electrical signal and the second electrical signal.

10. The evaluation method according to claim 9, characterized in that: The evaluating the state of the GIS disconnector transmission mechanism based on the first electrical signal and the second electrical signal includes: Determining first monitoring parameters of the first electrical signal and the second electrical signal, wherein the first monitoring parameters include: a three-phase pulse signal interval, a main transmission pulse signal interval, and a start and end time of the pulse signal of the main transmission and each phase; If the intervals of each phase in the three-phase pulse signal are equal, the intervals of the main transmission pulse signal are equal, and the start and end times of the pulse signals of the main transmission and each phase are equal, it is determined that the isolating switch transmission mechanism is normal; otherwise, it is determined that the isolating switch transmission mechanism is abnormal; Determining second monitoring parameters of the first electrical signal and the second electrical signal, wherein the second monitoring parameters include: a ratio of the number of main transmission signals to the number of signals of each phase, and an interval of a phase-split pulse signal; When the ratio of the number of main transmission signals to the number of signals of each phase is equal, the transmission mechanism is determined to be normal; otherwise, the transmission mechanism is determined to be abnormal; when the intervals of the phase pulse signals are not equal, it is determined that there is an abnormality in the gears of the transmission mechanism.

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