Arc extinguishing control method and device based on environment-friendly common-box disconnecting switch

Abstract

The invention discloses an arc extinguishing control method and device based on an environment-friendly common-box disconnecting switch, and relates to the technical field of intelligent control. The method comprises the following steps: determining a plurality of power-assisted isolation switches in an environment-friendly common box; performing arc extinguishing frequency prediction according to the real-time operation data set, and outputting a plurality of predicted arc extinguishing frequencies corresponding to the plurality of power-assisted isolation switches; obtaining an identification isolation switch whose predicted arc extinguishing frequency is greater than or equal to a preset arc extinguishing frequency and a non-identification isolation switch whose predicted arc extinguishing frequency is less than the preset arc extinguishing frequency in the plurality of power-assisted isolation switches; the adjustable check ring on the identification isolation switch is adjusted to a first spacing distance, and the adjustable check ring on the non-identification isolation switch is adjusted to a second spacing distance. The technical problems that in the prior art, the arc extinguishing control strategy is single, the reset position cannot be dynamically adjusted according to the real-time state of the disconnecting switch, the arc extinguishing efficiency is low, and the arc suppression effect is unstable are solved, and the technical effects that the arc extinguishing precision is improved through differential dynamic adjustment, and the arc extinguishing efficiency is enhanced are achieved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent control technology, and in particular to an arc extinguishing control method and device based on an environmentally friendly common-box isolating switch. Background Art

[0002] In the power system, the disconnector, as an important switching device, is mainly used for the isolation operation of electrical equipment to ensure the safe operation of the equipment. However, traditional arc extinguishing control technology generally has problems such as a single control strategy and the inability to dynamically adjust the reset position in real time, resulting in low arc extinguishing efficiency and unstable arc suppression effect. When the disconnector is disconnected, the generation of arcs is inevitable, and the long-term existence of arcs will not only cause serious damage to the disconnector and related equipment, but may also cause safety hazards such as fire. Therefore, how to improve the efficiency and stability of arc extinguishing control, especially in a complex power system operating environment, has become a technical problem that needs to be solved urgently. Existing arc extinguishing control methods are often designed based on fixed strategies and cannot be dynamically adjusted according to the real-time operating status of the disconnector. This method cannot give full play to the arc extinguishing effect, and as the equipment operating time increases, the arc extinguishing effect and equipment performance will gradually decline. Summary of the invention

[0003] The present application provides an arc extinguishing control method and device based on an environmentally friendly common-box isolating switch, which solves the technical problems in the prior art that the arc extinguishing control strategy is single and the reset position cannot be dynamically adjusted according to the real-time status of the isolating switch, resulting in low arc extinguishing efficiency and unstable arc suppression effect.

[0004] In view of the above problems, the present application provides an arc extinguishing control method and device based on an environmentally friendly common-box isolating switch.

[0005] In a first aspect of the present application, there is provided an arc extinguishing control method based on an environmentally friendly common box disconnector, the method comprising:

[0006] Determine multiple power-assisted isolating switches in the environmental protection common box; monitor the real-time operation data set of the multiple power-assisted isolating switches in real time through a sensor group, predict the arc extinguishing frequency according to the real-time operation data set, and output multiple predicted arc extinguishing frequencies corresponding to the multiple power-assisted isolating switches; obtain the identification isolating switches whose predicted arc extinguishing frequency is greater than or equal to the preset arc extinguishing frequency and the non-identification isolating switches whose predicted arc extinguishing frequency is less than the preset arc extinguishing frequency among the multiple power-assisted isolating switches; adjust the adjustable stop ring on the identification isolating switch to a first limit distance, and adjust the adjustable stop ring on the non-identification isolating switch to a second limit distance, wherein the limit distance is used to limit the reset position of the power-assisted spring arc contact in the power-assisted spring device after contact with the static arc contact.

[0007] In a second aspect of the present application, an arc extinguishing control device based on an environmentally friendly common box disconnector is provided, the device comprising:

[0008] A quantity determination module is used to determine multiple power-assisted isolating switches in an environmental protection common box; a data monitoring module is used to monitor the real-time operation data set of the multiple power-assisted isolating switches in real time through a sensor group, predict the arc extinguishing frequency according to the real-time operation data set, and output multiple predicted arc extinguishing frequencies corresponding to the multiple power-assisted isolating switches; an identification module is used to obtain the identification isolating switches whose predicted arc extinguishing frequency is greater than or equal to the preset arc extinguishing frequency and the non-identification isolating switches whose predicted arc extinguishing frequency is less than the preset arc extinguishing frequency among the multiple power-assisted isolating switches; an adjustment module is used to adjust the adjustable stop ring on the identification isolating switch to a first limit distance, and adjust the adjustable stop ring on the non-identification isolating switch to a second limit distance, wherein the limit distance is used to limit the reset position of the power-assisted spring arc contact in the power-assisted spring device after contact with the static arc contact.

[0009] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0010] First, determine the multiple power-assisted isolating switches in the environmental protection common box. Then, the real-time operation data set of the multiple power-assisted isolating switches is monitored in real time through the sensor group, the arc extinguishing frequency is predicted according to the real-time operation data set, and the multiple predicted arc extinguishing frequencies corresponding to the multiple power-assisted isolating switches are output. Then, the identification isolating switches whose predicted arc extinguishing frequency is greater than or equal to the preset arc extinguishing frequency and the non-identification isolating switches whose predicted arc extinguishing frequency is less than the preset arc extinguishing frequency are obtained from the multiple power-assisted isolating switches. Finally, adjust the adjustable stop ring on the identification isolating switch to the first limit spacing, and adjust the adjustable stop ring on the non-identification isolating switch to the second limit spacing, wherein the limit spacing is used to limit the reset position of the power-assisted spring arc contact after contact with the static arc contact in the power-assisted spring device. The technical problems in the prior art that the arc extinguishing control strategy is single and the reset position cannot be dynamically adjusted according to the real-time status of the isolating switch, resulting in low arc extinguishing efficiency and unstable arc suppression effect, are solved, and the technical effect of improving arc extinguishing accuracy and enhancing arc extinguishing efficiency through differentiated dynamic adjustment is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 A schematic flow chart of an arc extinguishing control method based on an environmentally friendly common box isolating switch provided in an embodiment of the present application;

[0013] Figure 2 A schematic diagram of the structure of an arc extinguishing control device based on an environmentally friendly common box disconnector provided in an embodiment of the present application;

[0014] Figure 3 A schematic diagram of the structure of a power-assisted isolating switch provided in an embodiment of the present application.

[0015] Explanation of the reference numerals: quantity determination module 11 , data monitoring module 12 , identification module 13 , adjustment module 14 , main circuit conductor 1 , moving contact 2 , auxiliary arc contact 3 , stop ring 4 , static contact 5 . DETAILED DESCRIPTION

[0016] The present application provides an arc extinguishing control method and device based on an environmentally friendly common-box isolating switch, thereby solving the technical problems in the prior art that the arc extinguishing control strategy is single and the reset position cannot be dynamically adjusted according to the real-time status of the isolating switch, resulting in low arc extinguishing efficiency and unstable arc suppression effect.

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0018] It should be noted that the terms "including" and "having" are intended to cover non-exclusive inclusions. For example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or modules that are not explicitly listed or are inherent to these processes, methods, products or devices.

[0019] Embodiment 1, as Figure 1 As shown, the present application provides an arc extinguishing control method based on an environmentally friendly common box disconnector, wherein the method includes:

[0020] Identify multiple power-assisted isolating switches within the environmental protection common box.

[0021] The positions and functions of multiple power-assisted disconnecting switches in the environmental protection box are determined from the design drawings of the environmental protection box. These disconnecting switches play a key role in power off and isolation in the equipment. Each disconnecting switch is equipped with a power-assisted spring device, which can provide additional mechanical assistance when disconnecting the circuit, ensuring that the switch can quickly and reliably complete the power off operation.

[0022] Furthermore, each power-assisted isolating switch includes a main contact, a power-assisted spring arc contact, a static arc contact, a transmission device, a casing and a main circuit conductor; the power-assisted spring device is installed in the main contact, and when the power-assisted isolating switch is disconnected, if the power-assisted spring of the power-assisted spring arc contact reaches the spring force value, after the power-assisted spring arc contact is disconnected from the static arc contact, the power-assisted spring arc contact is reset to the limit spacing set by the adjustable stop ring.

[0023] like Figure 3 As shown, each power-assisted disconnecting switch is composed of multiple key components, including main contacts, power-assisted spring arc contacts, static arc contacts, transmission devices, housings and main circuit conductors; wherein, the main contacts are the main disconnecting parts of the disconnecting switch. When the switch is disconnected, the main contacts will be disconnected from other circuit parts to cut off the current; the power-assisted spring arc contacts are connected to the power-assisted spring device. When the switch is disconnected, the power-assisted spring will provide additional mechanical force to push the arc contacts to quickly detach from the static arc contacts; the front end of the power-assisted spring device includes an adjustable stop ring, which is used to limit the movement range of the power-assisted spring arc contacts during the resetting process. By adjusting the adjustable stop ring, the arc extinguishing effect can be optimized under different working conditions; the static arc contact is the component that contacts the booster spring arc contact. It cooperates with the booster spring arc contact to ensure that the arc during the disconnection process can be extinguished in time to avoid the arc from existing for a long time and causing damage to the equipment; the transmission device is used to control the movement between the contacts to ensure that the opening and closing of the contacts can be completed accurately and quickly when the switch is disconnected or closed; the casing is used to protect the internal components of the disconnector to prevent the influence of the external environment and ensure the safe operation of the equipment; the main circuit conductor is the path for the current to pass through and plays the role of power transmission.

[0024] During the disconnection process, when the spring force of the booster spring arc contact reaches a certain threshold, it will quickly disconnect from the static arc contact to prevent the arc from lasting too long; at this time, the booster spring arc contact will be pushed by the spring and return to the limit spacing set by the adjustable stop ring. This limit spacing is controlled by the adjustable stop ring and plays a role in limiting the reset position of the booster spring arc contact. By adjusting the limit spacing, the reset position can be accurately controlled, thereby affecting the contact position of the contact and the process of arc extinguishing.

[0025] Furthermore, the insulating medium in the environmental protection common box is a SF6 / N2 gas mixture.

[0026] The environmental protection box uses a mixture of SF6 / N2 (sulfur hexafluoride / nitrogen) gases as an insulating medium. Specifically, SF6 has a strong arc extinguishing ability. When an arc is generated, SF6 can quickly absorb the heat in the arc and reduce the temperature of the arc, thereby helping to extinguish the arc and reduce the damage to the equipment caused by the arc. The addition of N2 can improve the performance of SF6, reduce the environmental burden of SF6, and reduce the emission of SF6, while retaining its excellent arc extinguishing and insulation properties. Therefore, the mixed use of SF6 and N2 can reduce the use of SF6, thereby reducing the negative impact on the environment.

[0027] The real-time operation data sets of the plurality of power-assisted isolating switches are monitored in real time by a sensor group, arc extinguishing frequency is predicted according to the real-time operation data sets, and a plurality of predicted arc extinguishing frequencies corresponding to the plurality of power-assisted isolating switches are output.

[0028] The sensor group is installed on each power-assisted disconnector to collect data related to the operating status of the equipment in real time, including current, voltage, temperature, mechanical pressure, operating status of the switch, etc. The data collected by the sensors are collected into a real-time operation data set, which contains detailed information about the disconnector at different time points and different working conditions, including but not limited to the number of switch operations, current peak when the switch is disconnected, temperature changes, arc duration, mechanical stress, etc. Based on the real-time operation data set, a prediction model (such as machine learning algorithm, statistical model) is used to predict the arc extinguishing frequency of each power-assisted disconnector. The arc extinguishing efficiency refers to the frequency of arc extinguishing in the disconnector within a certain period of time. According to the operating status and historical data of the equipment, the model can calculate the probability and frequency of arc extinguishing in the disconnector within a certain period of time in the future. For each disconnector, a predicted arc extinguishing frequency is generated based on the prediction model. These predicted arc extinguishing frequencies indicate the frequency at which each disconnector may need to perform arc extinguishing operations in the future working cycle.

[0029] Furthermore, the arc extinguishing frequency is predicted according to the real-time operation data set, and the method includes:

[0030] Among them, the real-time operation data set includes the number of current interruptions, current fluctuation amplitude, contact contact state, contact separation state and equipment load state of each power-assisted disconnecting switch; obtain a historical operation sample data set; train the historical operation sample data set through an autoregressive integral sliding average algorithm to obtain a trained autoregressive integral sliding average model; call the trained autoregressive integral sliding average model to predict the real-time operation data set, and output multiple predicted arc extinguishing frequencies corresponding to the multiple power-assisted disconnecting switches.

[0031] The real-time operation data set contains a number of important parameters of each power-assisted disconnector (current interruption times, current fluctuation amplitude, contact contact state, contact separation state, and equipment load state). These parameters reflect the working state of the disconnector and the key factors that may affect the arc extinguishing frequency. Specifically, the number of current interruptions refers to the number of times the disconnector disconnects the current within a certain period of time. Frequent current interruptions may mean a high arc extinguishing frequency. The current fluctuation amplitude affects the formation and extinction of the arc. Large fluctuations may cause a longer arc. The contact contact state refers to whether the switch contacts are in firm contact. Poor contact will generate an arc and affect the arc extinguishing efficiency. The contact separation state refers to whether the contacts are separated. The speed and degree of contact separation affect the arc extinguishing effect. Slower separation may cause the arc to last longer. The equipment load state directly affects the operating frequency of the switch and the possibility of arcing. When the load is too large, the frequency of arc extinguishing usually increases.

[0032] The historical operation data of the equipment is collected from the database to obtain a historical operation sample data set. The historical operation sample data set contains the operation data of the equipment within a certain period of time in the past, including the various data parameters monitored in real time mentioned above. The autoregressive integrated moving average algorithm is a time series prediction method that is often used to analyze and predict data based on time changes. It predicts future values ​​based on trends, seasonality, and noise in historical data. By inputting the historical operation sample data set into the autoregressive integrated moving average (ARIMA) model for training, the system can learn the arc extinguishing frequency pattern under different operating conditions and how to predict the future arc extinguishing frequency based on real-time operation data. After the ARIMA model completes training, the trained ARIMA model is called to predict the real-time operation data set and output the predicted arc extinguishing frequency of each power-assisted disconnector.

[0033] Furthermore, the historical running sample data set is trained by an autoregressive integrated moving average algorithm to obtain a trained autoregressive integrated moving average model, and the method includes:

[0034] Select initial parameters for training the autoregressive integrated moving average model, wherein the initial parameters include differential data parameters, autocorrelation function parameters, and partial autocorrelation function parameters; combine parameters according to the selected initial parameters to obtain an initialized model; input the historical operation sample data set into the initialized model for training, fit the model parameters by minimizing the mean square error until the fitting effect reaches a threshold, and output the trained autoregressive integrated moving average model.

[0035] The process of training the historical running sample data set through the autoregressive integrated moving average (ARIMA) algorithm and obtaining the trained ARIMA model first requires selecting appropriate initial parameters, which include differential data parameters, autocorrelation function (ACF) parameters, and partial autocorrelation function (PACF) parameters. The differential data parameters are used to process the trend component in the time series; through the differential operation, the non-stationarity of the data can be eliminated, making the time series stable and convenient for subsequent modeling; the number of differentials (i.e., the order of differentials) is usually determined by observing the trend of the data. If the data shows a linear trend, a differential process is required; if there is seasonality or more complex trends in the data, multiple differentials may be required. Next, the autocorrelation function (ACF) and partial autocorrelation function (PACF) are calculated to help select the order of the AR (autoregressive) and MA (moving average) parts of the model; ACF is used to measure the correlation between each time point in the data to help determine the order of the moving average (MA) part; while PACF helps select the order of the AR part by removing other lagging effects and quantifying the direct relationship between the current time point and several previous time points.

[0036] After the initial parameters are determined, the parameters are combined to obtain the initialized model. At this point, the ARIMA model has a basic structure, including three parts: AR, I (integral) and MA. On this basis, the historical operation sample data set is input into the initialized ARIMA model for training. The goal of the training process is to optimize the model parameters by minimizing the mean square error (MSE). The mean square error is a common indicator for measuring the difference between the model prediction value and the actual observation value. Minimizing MSE means that the accuracy of the model prediction is constantly improving. During the training process, the ARIMA model will be compared with the historical data after each adjustment to evaluate the fitting effect of the current model and gradually adjust the parameters until the set fitting threshold is reached. When the fitting effect reaches the threshold, it indicates that the model can well explain the patterns and trends in the historical data and has good prediction capabilities. Finally, after continuous optimization of the training process, a trained ARIMA model will be output, which can effectively predict the arc extinguishing frequency based on the input real-time operation data set.

[0037] Furthermore, before training the historical running sample data set by using the autoregressive integrated moving average algorithm, the method further includes:

[0038] A KPSS stationarity test is performed on the historical operation sample data set to obtain a stationarity test result; if the stationarity test result fails, multi-order difference processing is performed on the data points of adjacent time series in the historical operation sample data set until the stationarity test result passes, and an optimized historical operation sample data set is output, wherein the multi-order difference processing includes first-order difference processing and second-order difference processing; the optimized historical operation sample data set is trained by an autoregressive integrated sliding average algorithm.

[0039] Before training the historical running sample data set through the Autoregressive Integrated Moving Average (ARIMA) algorithm, a stationarity test is first required. The specific steps include using the KPSS (Kwiatkowski-Phillips-Schmidt-Shin) stationarity test to evaluate whether the data is stationary; if the KPSS stationarity test result shows that the data is not stationary, the data needs to be differentiated until the data is stable. The differential processing steps usually include first-order differences and second-order differences until the stationarity test result passes.

[0040] Specifically, the KPSS test is used to test the stability of the historical running sample data set in order to determine whether the time series has a unit root, so as to determine whether the data needs to be differentially processed; if the data passes the KPSS test, it means that the data is stable and the ARIMA model can be trained directly; if it does not pass, it will enter the next step of differential processing. If the KPSS test shows that the data is not stable, it means that the data contains trend components and cannot be directly used for model training. At this time, the data needs to be differentially processed. Differentiation is to eliminate the trend by calculating the difference between the data at the current time point and the previous time point. First, the first-order difference is performed, that is, the difference between each data point and the previous data point is calculated; if the data after the first-order difference still has a trend component, the second-order difference is further performed, that is, the data after the first-order difference is differentially processed again. This process can be repeated until the data is stable. After multi-order difference processing such as first-order difference and second-order difference, the KPSS stationarity test is performed again; if the data after difference passes the stationarity test, it means that the data is already stable, and the optimized historical running sample data set can be output. The optimized data set no longer contains trend components and is suitable for ARIMA model training. Use the optimized data set after difference processing to train the ARIMA model. By inputting the optimized data, the ARIMA algorithm will automatically identify the autoregressive part (AR), the difference part (I), and the moving average part (MA) in the time series, and adjust the model parameters by minimizing the mean square error (MSE). During the training process, the ARIMA model will adjust its autoregressive, difference, and moving average parameters until the fitting effect meets the set threshold.

[0041] Obtain, from among the plurality of power-assisted disconnecting switches, identified disconnecting switches whose predicted arc extinguishing frequency is greater than or equal to a preset arc extinguishing frequency and non-identified disconnecting switches whose predicted arc extinguishing frequency is less than the preset arc extinguishing frequency.

[0042] The preset arc extinguishing frequency is a standard value defined in advance, representing an ideal or allowable arc extinguishing frequency level; after obtaining the predicted arc extinguishing frequency of each disconnector, it is compared with the preset arc extinguishing frequency. For those disconnectors whose predicted arc extinguishing frequency is greater than or equal to the preset arc extinguishing frequency, these disconnectors are identified as identification disconnectors. Such switches have a higher predicted arc extinguishing frequency and may require more maintenance or more frequent arc extinguishing control strategies; for disconnectors whose predicted arc extinguishing frequency is less than the preset arc extinguishing frequency, these switches are identified as non-identification disconnectors. Such switches have a lower arc extinguishing frequency and may not require frequent arc extinguishing control, and can operate in a normal working state. By dividing multiple power-assisted disconnectors into identification disconnectors and non-identification disconnectors, different control strategies can be adopted according to their predicted arc extinguishing frequencies. For example, identification disconnectors may require more attention, such as adjusting the reset position, regular inspection, or adjusting the arc extinguishing control strategy to avoid frequent arc extinguishing. Non-identification disconnectors can operate in a normal working state, reducing unnecessary adjustments.

[0043] Adjust the adjustable stop ring on the identification isolating switch to a first limit distance, and adjust the adjustable stop ring on the non-identification isolating switch to a second limit distance, wherein the limit distance is used to limit the reset position of the assist spring arc contact in the assist spring device after contact with the static arc contact.

[0044] The limit spacing refers to the part where the adjustable stop ring is connected to the assist spring device, which is used to limit the reset position of the assist spring arc contact after contacting the static arc contact, so as to ensure that the arc can be extinguished quickly. For the identification disconnector (i.e., the switch with the predicted arc extinguishing frequency greater than or equal to the preset arc extinguishing frequency), more precise arc extinguishing control is required. To this end, the adjustable stop ring on the identification disconnector is adjusted to the first limit spacing. The first limit spacing is set relatively compactly to ensure that the assist spring arc contact can be quickly reset and cut off the current when the arc is generated, thereby achieving a more efficient arc extinguishing effect. For the non-identification disconnector (i.e., the switch with the predicted arc extinguishing frequency less than the preset arc extinguishing frequency), due to its lower arc extinguishing frequency, the arc extinguishing operation is not as frequent as the identification disconnector. Therefore, the adjustable stop ring on the non-identification disconnector can be adjusted to the second limit spacing. The second limit spacing is relatively wide and is suitable for the situation where the arc generation frequency is low. It can ensure that the contact can still be accurately reset when the non-identification disconnector disconnects the circuit, while avoiding unnecessary over-adjustment, ensuring the stability of the equipment and long-term reliable operation. When the disconnector disconnects the circuit, the auxiliary spring arc contact is pushed apart from the static arc contact by the spring force, and the arc is extinguished. The adjustment accuracy of the limit spacing is directly related to the speed and stability of the contact reset, which in turn affects the arc extinguishing efficiency; a smaller limit spacing helps to quickly reset the contact and reduce the arc duration, which is suitable for switches with frequent arc extinguishing; while a larger limit spacing is suitable for switches with less arc extinguishing, avoiding unnecessary rapid reset and ensuring the smooth operation of the equipment.

[0045] Furthermore, after adjusting the adjustable stop ring on the marking isolating switch to the first limit spacing, the method further includes:

[0046] When the predicted arc extinguishing frequency of the identification disconnector is less than the preset arc extinguishing frequency, the adjustable stop ring on the identification disconnector is adjusted from the first limit spacing to the second limit spacing, wherein the first limit spacing is less than the second limit spacing.

[0047] In some cases, although the disconnector is marked as a marked disconnector that requires precise control, its predicted arc extinguishing frequency may be less than the preset arc extinguishing frequency during actual use. This situation indicates that the arc extinguishing demand of the disconnector is low and the actual frequency of arcing is low. In order to adapt to this situation, the adjustable stop ring needs to be further adjusted according to the change of the predicted arc extinguishing frequency. Specifically, if the predicted arc extinguishing frequency of the marked disconnector is lower than the preset value, that is, the arc extinguishing frequency is low, indicating that the arc suppression demand of the switch is not as frequent or strong as expected. In this case, the adjustable stop ring needs to be adjusted from the first limit spacing to the second limit spacing. The first limit spacing is usually smaller and is suitable for high-frequency arc extinguishing. It can ensure rapid reset to suppress the arc; while the second limit spacing is larger, which is used to reduce the speed of contact reset, so that the contact can still maintain sufficient reset accuracy when arc extinguishing does not occur frequently, avoiding unnecessary over-adjustment. By dynamically adjusting the limit spacing of the adjustable stop ring, both the efficient operation of the equipment and the effective suppression of the arc under different working conditions can be guaranteed.

[0048] Furthermore, the adjustment range of the first limit spacing is 0.5 mm to 5 mm, and the adjustment range of the second limit spacing is 5 mm to 10 mm.

[0049] The adjustment range of the first limit spacing is 0.5mm to 5mm. When the limit spacing of the adjustable stop ring is adjusted within this range, the reset position of the contact will be closer to the starting position, ensuring that when the disconnector disconnects the circuit, the auxiliary spring arc contact and the static arc contact are quickly separated and restored to their original positions. The adjustment range of the second limit spacing is 5mm to 10mm. When the limit spacing of the adjustable stop ring is adjusted within this range, the reset action is relatively slow, ensuring that the contact does not excessively interfere with the operating state of the equipment when resetting. By setting the adjustment range of the first limit spacing between 0.5mm and 5mm, and the second limit spacing between 5mm and 10mm, precise control of the disconnector under different working conditions can be ensured.

[0050] In summary, the embodiments of the present application have at least the following technical effects:

[0051] First, determine the multiple power-assisted isolating switches in the environmental protection common box. Then, the real-time operation data set of the multiple power-assisted isolating switches is monitored in real time through the sensor group, the arc extinguishing frequency is predicted according to the real-time operation data set, and the multiple predicted arc extinguishing frequencies corresponding to the multiple power-assisted isolating switches are output. Then, the identification isolating switches whose predicted arc extinguishing frequency is greater than or equal to the preset arc extinguishing frequency and the non-identification isolating switches whose predicted arc extinguishing frequency is less than the preset arc extinguishing frequency are obtained from the multiple power-assisted isolating switches. Finally, adjust the adjustable stop ring on the identification isolating switch to the first limit spacing, and adjust the adjustable stop ring on the non-identification isolating switch to the second limit spacing, wherein the limit spacing is used to limit the reset position of the power-assisted spring arc contact after contact with the static arc contact in the power-assisted spring device. The technical problems in the prior art that the arc extinguishing control strategy is single and the reset position cannot be dynamically adjusted according to the real-time status of the isolating switch, resulting in low arc extinguishing efficiency and unstable arc suppression effect, are solved, and the technical effect of improving arc extinguishing accuracy and enhancing arc extinguishing efficiency through differentiated dynamic adjustment is achieved.

[0052] Embodiment 2 is based on the same inventive concept as the arc extinguishing control method based on the environmental protection common box disconnector in the above embodiment. Figure 2 As shown, the present application provides an arc extinguishing control device based on an environmentally friendly common box disconnector, wherein the device includes:

[0053] A quantity determination module 11 is used to determine multiple power-assisted isolating switches in an environmental protection common box; a data monitoring module 12 is used to monitor the real-time operation data set of the multiple power-assisted isolating switches in real time through a sensor group, predict the arc extinguishing frequency according to the real-time operation data set, and output multiple predicted arc extinguishing frequencies corresponding to the multiple power-assisted isolating switches; an identification module 13 is used to obtain the identification isolating switches whose predicted arc extinguishing frequency is greater than or equal to the preset arc extinguishing frequency and the non-identification isolating switches whose predicted arc extinguishing frequency is less than the preset arc extinguishing frequency among the multiple power-assisted isolating switches; an adjustment module 14 is used to adjust the adjustable stop ring on the identification isolating switch to a first limit distance, and adjust the adjustable stop ring on the non-identification isolating switch to a second limit distance, wherein the limit distance is used to limit the reset position of the power-assisted spring arc contact in the power-assisted spring device after contact with the static arc contact.

[0054] Furthermore, the data monitoring module 12 is used to execute the following method:

[0055] Among them, the real-time operation data set includes the number of current interruptions, current fluctuation amplitude, contact contact state, contact separation state and equipment load state of each power-assisted disconnecting switch; obtain a historical operation sample data set; train the historical operation sample data set through an autoregressive integral sliding average algorithm to obtain a trained autoregressive integral sliding average model; call the trained autoregressive integral sliding average model to predict the real-time operation data set, and output multiple predicted arc extinguishing frequencies corresponding to the multiple power-assisted disconnecting switches.

[0056] Furthermore, the data monitoring module 12 is used to execute the following method:

[0057] Select initial parameters for training the autoregressive integrated moving average model, wherein the initial parameters include differential data parameters, autocorrelation function parameters, and partial autocorrelation function parameters; combine parameters according to the selected initial parameters to obtain an initialized model; input the historical operation sample data set into the initialized model for training, fit the model parameters by minimizing the mean square error until the fitting effect reaches a threshold, and output the trained autoregressive integrated moving average model.

[0058] Furthermore, the data monitoring module 12 is used to execute the following method:

[0059] A KPSS stationarity test is performed on the historical operation sample data set to obtain a stationarity test result; if the stationarity test result fails, multi-order difference processing is performed on the data points of adjacent time series in the historical operation sample data set until the stationarity test result passes, and an optimized historical operation sample data set is output, wherein the multi-order difference processing includes first-order difference processing and second-order difference processing; the optimized historical operation sample data set is trained by an autoregressive integrated sliding average algorithm.

[0060] Furthermore, the adjustment module 14 is used to perform the following method:

[0061] When the predicted arc extinguishing frequency of the identification disconnector is less than the preset arc extinguishing frequency, the adjustable stop ring on the identification disconnector is adjusted from the first limit spacing to the second limit spacing, wherein the first limit spacing is less than the second limit spacing.

[0062] Furthermore, the adjustment module 14 is used to perform the following method:

[0063] The adjustment range of the first limit spacing is 0.5 mm to 5 mm, and the adjustment range of the second limit spacing is 5 mm to 10 mm.

[0064] Furthermore, the quantity determination module 11 is used to execute the following method:

[0065] Each power-assisted isolating switch includes a main contact, a power-assisted spring arc contact, a static arc contact, a transmission device, a casing and a main circuit conductor; the power-assisted spring device is installed in the main contact. When the power-assisted isolating switch is disconnected, if the power-assisted spring of the power-assisted spring arc contact reaches the spring force value, after the power-assisted spring arc contact is disconnected from the static arc contact, the power-assisted spring arc contact is reset to the limit distance set by the adjustable stop ring.

[0066] Furthermore, the quantity determination module 11 is used to execute the following method:

[0067] The insulating medium in the environmental protection common box is a SF6 / N2 gas mixture.

[0068] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description and does not represent the advantages and disadvantages of the embodiments. And the above-mentioned specific embodiments of this specification are described. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0069] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0070] This specification and drawings are merely exemplary illustrations of the present application and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, a person skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalents, the present application intends to include these modifications and variations.

Claims

1. An arc extinguishing control method based on an environmentally friendly common box isolating switch, characterized in that: The isolating switch includes a booster spring device, the end of the booster spring device includes an adjustable stop ring, and the method includes: Identify multiple power-assisted isolating switches in the environmental protection box; Monitor the real-time operation data sets of the plurality of power-assisted disconnecting switches in real time through a sensor group, predict the arc extinguishing frequency according to the real-time operation data sets, and output a plurality of predicted arc extinguishing frequencies corresponding to the plurality of power-assisted disconnecting switches; Obtaining, from among the plurality of power-assisted disconnecting switches, an identified disconnecting switch whose predicted arc extinguishing frequency is greater than or equal to a preset arc extinguishing frequency and a non-identified disconnecting switch whose predicted arc extinguishing frequency is less than the preset arc extinguishing frequency; Adjust the adjustable stop ring on the identification isolating switch to a first limit distance, and adjust the adjustable stop ring on the non-identification isolating switch to a second limit distance, wherein the limit distance is used to limit the reset position of the assist spring arc contact in the assist spring device after contact with the static arc contact.

2. The method according to claim 1, characterized in that The arc extinguishing frequency is predicted according to the real-time operation data set. include: The real-time operation data set includes the current interruption times, current fluctuation amplitude, contact contact state, contact separation state and equipment load state of each power-assisted isolating switch; Get the historical running sample data set; The historical operation sample data set is trained by an autoregressive integrated moving average algorithm to obtain a trained autoregressive integrated moving average model; The trained autoregressive integrated moving average model is called to predict the real-time operation data set, and multiple predicted arc extinguishing frequencies corresponding to the multiple power-assisted disconnecting switches are output.

3. The method according to claim 2, characterized in that The historical running sample data set is trained by an autoregressive integrated moving average algorithm to obtain a trained autoregressive integrated moving average model, the method comprising: Selecting initial parameters for training the autoregressive integrated moving average model, wherein the initial parameters include differential data parameters, autocorrelation function parameters, and partial autocorrelation function parameters; Combine parameters according to the selected initial parameters to obtain an initialization model; The historical running sample data set is input into the initialization model for training, and the model parameters are fitted by minimizing the mean square error until the fitting effect reaches a threshold, and the trained autoregressive integrated moving average model is output.

4. The method according to claim 2, characterized in that Before training the historical running sample data set by using the autoregressive integrated sliding average algorithm, the method further includes: Perform a KPSS stationarity test on the historical operation sample data set to obtain a stationarity test result; If the stability test result fails, multi-order difference processing is performed on the data points of the adjacent time series in the historical operation sample data set until the stability test result passes, and the optimized historical operation sample data set is output, wherein the multi-order difference processing includes first-order difference processing and second-order difference processing; The optimized historical running sample data set is trained using the autoregressive integrated moving average algorithm.

5. The method according to claim 1, characterized in that After adjusting the adjustable stop ring on the marking isolating switch to a first limit spacing, the method further includes: When the predicted arc extinguishing frequency of the identification disconnector is less than the preset arc extinguishing frequency, the adjustable stop ring on the identification disconnector is adjusted from the first limit spacing to the second limit spacing, wherein the first limit spacing is less than the second limit spacing.

6. The method according to claim 1, characterized in that The adjustment range of the first limit spacing is 0.5 mm to 5 mm, and the adjustment range of the second limit spacing is 5 mm to 10 mm.

7. The method according to claim 1, characterized in that Each power-assisted disconnector includes a main contact, a power-assisted spring arc contact, a static arc contact, a transmission device, a housing and a main circuit conductor; The booster spring device is installed in the main contact. When the booster isolating switch is disconnected, if the booster spring of the booster spring arc contact reaches the spring force value, after the booster spring arc contact is disconnected from the static arc contact, the booster spring arc contact is reset to the limit distance set by the adjustable stop ring.

8. The method according to claim 1, characterized in that The insulating medium in the environmental protection common box is a SF6 / N2 gas mixture.

9. An arc extinguishing control device based on an environmentally friendly common box disconnector, characterized in that: For implementing an arc extinguishing control method based on an environmentally friendly common-box disconnector according to any one of claims 1 to 8, the device comprises: A quantity determination module is used to determine multiple power-assisted isolating switches in the environmental protection common box; A data monitoring module, used to monitor the real-time operation data sets of the plurality of power-assisted disconnecting switches in real time through a sensor group, predict the arc extinguishing frequency according to the real-time operation data sets, and output a plurality of predicted arc extinguishing frequencies corresponding to the plurality of power-assisted disconnecting switches; An identification module, used for obtaining, from among the plurality of power-assisted disconnecting switches, an identified disconnecting switch whose predicted arc extinguishing frequency is greater than or equal to a preset arc extinguishing frequency and a non-identified disconnecting switch whose predicted arc extinguishing frequency is less than the preset arc extinguishing frequency; An adjustment module is used to adjust the adjustable stop ring on the identification isolating switch to a first limit distance, and to adjust the adjustable stop ring on the non-identification isolating switch to a second limit distance, wherein the limit distance is used to limit the reset position of the assisting spring arc contact in the assisting spring device after contact with the static arc contact.

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