Protection method and system for energy storage loop of circuit breaker

Abstract

The invention discloses a circuit breaker energy storage loop protection method and system, and belongs to the technical field of circuit breaker energy storage loop protection, and the method comprises the steps: S100, obtaining the historical operation data of an energy storage device, and obtaining a state characteristic factor in the historical operation data according to a state type; s200, the real-time state type of the energy storage device is determined according to the state characteristic factor and the collected real-time operation data of the energy storage device, and when the real-time state of the energy storage device is judged to be energy storage completion, the energy storage device sends out a signal to control the protection device and the detection device to start; s300, after the protection device and the detection device are started, the protection device executes a protection action to cut off the power supply of the energy storage device; synchronously, the detection device collects real-time energy storage data of the energy storage device and historical energy storage data of the energy storage device for similarity analysis to determine a detection factor, and whether the energy storage device finishes energy storage or not is judged according to the detection factor; the problem of insufficient energy storage of the spring circuit breaker due to the fact that the energy storage state of the energy storage device is not detected in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker energy storage circuit protection, and in particular to a circuit breaker energy storage circuit protection method and system. Background Art

[0002] With the continuous development of social economy, the power load is increasing, and the requirements for the safe operation of related equipment are also increasing. However, the existing spring-operated circuit breakers are prone to cause the energy storage motor to idle for a long time due to the broken pins of the energy storage mechanical part, the chain falling off, the damage of the one-way clutch, the adhesion of the electrical circuit contacts, etc., causing the temperature to rise and even the switch cabinet to catch fire, which seriously damages the safety of equipment operation and causes huge economic losses.

[0003] At present, when the motor of the spring-operated mechanism circuit breaker in the substation has been idling for a long time after the energy storage time has expired, a fault signal will be sent to the monitoring staff, and then the monitoring staff will notify the staff to go to the site to cut off the power. However, due to the long distance, long time consumption, aging equipment and other reasons, the energy storage motor is in a state of being powered on and working for a long time before the staff arrives at the site, causing the motor to heat up and burn out and unable to store energy again. In addition, since the protection device of the spring circuit breaker energy storage circuit cannot monitor the energy storage state of the energy storage motor, it is impossible to identify whether the energy storage motor has completed energy storage, resulting in the energy storage motor being forced to cut off the power and stop working before completing energy storage.

[0004] Chinese patent, publication number: CN115798971A, publication date: March 14, 2023, discloses a high-voltage circuit breaker energy storage control and protection module, including a drive circuit and a control unit, the drive circuit is used to be arranged in series on the energy storage circuit of the energy storage motor, and the drive circuit is arranged in series with a thyristor and a hard contact switch; the control unit controls the connection between the thyristor and the hard node switch, and is used to control the hard contact switch to be turned on and then the thyristor to be turned on when the control drive circuit is turned on, and to control the thyristor to be turned off and then the hard contact switch to be turned off when the control drive circuit is turned off; and the high-voltage circuit breaker energy storage control and protection module proposed in the invention does not detect the energy storage state of the energy storage motor, and thus cannot identify whether the energy storage motor has completed energy storage, resulting in the energy storage motor being forced to cut off the power and stop working before completing energy storage. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of insufficient energy storage of a spring circuit breaker due to the lack of detection of the energy storage state of an energy storage device when performing a protection action on the energy storage circuit of a spring circuit breaker in the prior art; a protection method and system for a circuit breaker energy storage circuit are proposed, a state characteristic factor is obtained through historical operation data of the energy storage device, and the real-time state type of the energy storage device and the energy storage completion status of the energy storage device are judged according to the state characteristic factor and the real-time operation data of the energy storage device, so as to effectively avoid the burning of the energy storage device and ensure that the energy storage process of the energy storage device is normal, and after the energy storage of the energy storage device is completed, the protection device is started to protect it, so as to effectively avoid damage caused by long-term idling of the energy storage device, and at the same time, the detection device is started to perform similarity analysis on the real-time energy storage data and the historical energy storage data to determine the detection factor, and whether the energy storage device has finished energy storage is judged according to the detection factor, so as to ensure that the energy storage of the energy storage device meets the requirements of the actual working conditions of the circuit breaker.

[0006] In a first aspect, a technical solution provided in an embodiment of the present invention is a method for protecting a circuit breaker energy storage circuit, comprising the following steps: S100, obtaining historical operation data of the energy storage device, and obtaining state characteristic factors in the historical operation data according to the state type; S200, determining the real-time state type of the energy storage device according to the state characteristic factors and the collected real-time operation data of the energy storage device, and when the real-time state of the energy storage device is judged to be energy storage completion, the energy storage device sends a signal to control the protection device and the detection device to start working; S300, after the protection device and the detection device are started, the protection device performs a protection action to cut off the power supply of the energy storage device; Synchronously, the detection device collects the real-time energy storage data of the energy storage device and the historical energy storage data of the energy storage device to perform similarity analysis to determine the detection factor, and determines whether the energy storage device ends energy storage according to the detection factor.

[0007] In this solution, the state characteristic factor is obtained according to the historical operation data of the energy storage device, and the data characteristics that affect the operation state of the energy storage device in the historical operation data can be obtained. The historical operation data corresponds to the real-time operation data and both act on the energy storage device, so the state characteristic factor can judge the abnormal data and abnormal type in the real-time operation data, and obtain the real-time state type of the energy storage device, so as to realize real-time monitoring of the energy storage process of the energy storage device, and effectively prevent the energy storage device from burning due to sudden abnormal current. Secondly, when the real-time state of the energy storage device is judged to be energy storage completion, the protection device is started to protect the energy storage device, effectively preventing the energy storage device from being damaged due to long-term idling. In addition, the detection device is started at the same time as the protection device is started. The detection device performs similarity analysis on the real-time energy storage data and the historical energy storage data to determine the detection factor, and judges whether the energy storage device has finished energy storage according to the detection factor, so as to ensure that the energy storage of the energy storage device meets the requirements of the actual working conditions of the circuit breaker, and effectively avoid the energy storage device being forced to power off and stop working before completing energy storage.

[0008] Preferably, in S100, the specific process of obtaining the historical operation data of the energy storage device and obtaining the state characteristic factor in the historical operation data according to the state type is: S111, acquiring historical operation data of the energy storage device, wherein the historical operation data at least includes historical energy storage time, historical current data, and historical status data; S112, extracting state features from historical state data to determine state type; S113, performing time-frequency analysis on the historical energy storage time and historical current data corresponding to the state type to determine the state characteristic factor; the state characteristic factor represents the change characteristics of the current data of the energy storage device under different state types within the energy storage time period.

[0009] In this solution, the state characteristic factor can represent the state change characteristics of the energy storage device caused by historical current data and historical energy storage time, providing strong support for the subsequent judgment of the real-time state of the energy storage device.

[0010] Preferably, in S200, the specific process of determining the real-time state type of the energy storage device according to the state characteristic factor and the collected real-time operation data of the energy storage device is: S211, collecting real-time operation data of the energy storage device, wherein the real-time operation data at least includes real-time energy storage time and real-time current data; S212, performing time-frequency analysis on the real-time energy storage time and real-time current data to determine a real-time state characteristic factor; S213, comparing and analyzing the real-time state characteristic factor with the state characteristic factor to determine the real-time state type of the energy storage device; The real-time status type includes at least energy storage device abnormality, energy storage device energy storage completion, and energy storage device energy storage incomplete.

[0011] In this solution, by performing time-frequency analysis on the real-time energy storage time and real-time current data to determine the real-time state characteristic factor, the real-time current data can be monitored, thereby timely discovering the fault of the energy storage device and effectively preventing it from operating in a faulty state. At the same time, the energy storage time can be monitored to prevent the energy storage device from exceeding the energy storage cycle, that is, idling after the energy storage time and causing damage.

[0012] Preferably, in S300, the specific process of the detection device performing similarity analysis on the real-time energy storage data and the historical energy storage data to determine the detection factor is as follows: S311, extracting action energy storage data corresponding to when the detection device performs a detection action from the historical energy storage data, and performing feature extraction on the action energy storage data to determine detection features; S312, performing a change trend analysis on the real-time energy storage data according to the detection feature to obtain a change trend of the real-time energy storage data, and determining a detection factor according to the change trend; The historical energy storage data at least includes historical temperature data of the energy storage device and historical energy storage spring pressure; The real-time energy storage data at least includes real-time temperature data of the energy storage device and real-time energy storage spring pressure.

[0013] In this solution, the detection features in the historical energy storage data are extracted to clarify the internal features of the data when the detection device performs the detection action, and the detection features are used to determine the detection factor in the changing trend of the real-time energy storage data to support subsequent detection actions.

[0014] Preferably, in S300, the specific process of judging whether the energy storage device ends energy storage according to the detection factor is: S321, extracting data corresponding to the detection factor from the real-time energy storage data and comparing it with a preset energy storage threshold, when the real-time energy storage data does not meet the energy storage threshold, determining that the energy storage condition of the energy storage device is unqualified and executing S322, otherwise the energy storage device ends energy storage; S322. Calculate the number of cycles for this time according to the preset number of cycles and the cycle formula. When the number of cycles for this time is less than or equal to the stop threshold, the energy storage device stops storing energy.

[0015] In this solution, the detection factor is used to filter the real-time energy storage data, which greatly improves the efficiency and accuracy of the detection device in processing data. The data corresponding to the detection factor is compared with the preset energy storage threshold, so that the energy storage condition of the energy storage device is monitored in real time while detecting whether its working state is abnormal, and energy storage devices with hidden dangers are promptly checked. If the energy storage condition of the energy storage device is detected to be unqualified, the number of cycles is calculated according to the preset number of cycles and cycle formula. When the number of cycles is less than or equal to the stop threshold, it is preliminarily determined that the energy storage device has failed to store energy due to some unknown reason, and the energy storage is terminated.

[0016] Preferably, after S300 is completed, the detection device detects the real-time energy storage spring pressure of the energy storage device according to a preset detection cycle cycle.

[0017] In this solution, the detection device detects the real-time energy storage spring pressure of the energy storage device according to a preset detection cycle, and can continuously monitor the internal state of the energy storage device during the working cycle, effectively improving the continuous stability of the energy storage device while preventing potential failures. At the same time, the energy storage strategy can be optimized according to the real-time energy storage spring pressure, significantly improving the energy storage efficiency of the energy storage device.

[0018] On the other hand, a technical solution also provided in an embodiment of the present invention is a protection system for a circuit breaker energy storage circuit, comprising: Energy storage devices, protection devices, and detection devices; The first controlled end of the energy storage device is electrically connected to the first control end of the protection device, and the second controlled end of the energy storage device is electrically connected to the first control end of the detection device; The controlled end of the protection device is electrically connected to the second control end of the detection device; The first data acquisition terminal of the detection device is electrically connected to the first data monitoring terminal of the energy storage device, the second data acquisition terminal of the detection device is electrically connected to the second data monitoring terminal of the energy storage device, and the third data acquisition terminal of the detection device is electrically connected to the third data monitoring terminal of the energy storage device.

[0019] In this solution, the protection device is used to protect the energy storage device, which can cut off the power supply of the energy storage device; the detection device is used to monitor the real-time status of the energy storage device, which can also cut off the power supply of the energy storage device. At the same time, the detection device controls the protection device to perform protective actions on the energy storage device.

[0020] Preferably, the energy storage device comprises: an energy storage motor and a spring; The energy storage motor is mechanically connected to the spring, and the first controlled end of the energy storage motor is the first controlled end of the energy storage device, and the second controlled end of the energy storage motor is the second controlled end of the energy storage device. The current monitoring end of the energy storage motor is electrically connected to the first data monitoring end of the energy storage device, and the energy storage spring pressure monitoring end of the spring is electrically connected to the second data monitoring end of the energy storage device.

[0021] Preferably, the protection device comprises: an AC contactor and an indicator light; The first control end of the AC contactor is the first control end of the protection device, the second control end of the AC contactor is electrically connected to the controlled end of the indicator light, and the controlled end of the AC contactor is the controlled end of the protection device.

[0022] Preferably, the detection device comprises: a time relay, a terminal sensor, a controller and a control switch; The data acquisition end of the controller is electrically connected to the data collection end of the terminal sensor, the first control end of the controller is electrically connected to the controlled end of the control switch, and the second control end of the controller is electrically connected to the controlled end of the time relay; The control end of the time relay is the second control end of the detection device, and the collection end of the time relay is electrically connected to the third data monitoring end of the energy storage device as the third data collection end of the detection device; The control end of the control switch is the first control end of the detection device; The first data acquisition end of the terminal sensor is the first data acquisition end of the detection device, and the second data acquisition end of the terminal sensor is the second data acquisition end of the detection device.

[0023] In this solution, the acquisition end of the time relay can serve as the third data acquisition end of the detection device and also as the third data monitoring end of the energy storage device; the time relay controls the protection device, the control switch controls the detection device, and the time relay can cut off the power supply of the energy storage device at the first time when the energy storage device times out.

[0024] The present invention has at least the following substantial effects: The present application obtains a state characteristic factor based on the historical operation data of the energy storage device, and can obtain the data characteristics that affect the operation state of the energy storage device in the historical operation data, and the historical operation data corresponds to the real-time operation data and both act on the energy storage device, so the state characteristic factor can judge the abnormal data and abnormal type in the real-time operation data, obtain the real-time state type of the energy storage device, and realize real-time monitoring of the energy storage process of the energy storage device, effectively preventing the energy storage device from burning due to sudden abnormal current. Secondly, when the real-time state of the energy storage device is judged to be energy storage completion, the protection device is started to protect the energy storage device, effectively preventing the energy storage device from being damaged by long-term idling. In addition, when the protection device is started, the detection device is started at the same time. The detection device performs similarity analysis on the real-time energy storage data and the historical energy storage data to determine the detection factor, and judges whether the energy storage device has ended energy storage according to the detection factor, to ensure that the energy storage of the energy storage device meets the actual working conditions of the circuit breaker, effectively avoid the energy storage device being forced to power off and stop working before completing energy storage, and screen out energy storage devices with hidden dangers.

[0025] The above invention content is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts.

[0027] Figure 1 This is a flow chart of a protection method and system for a circuit breaker energy storage circuit of the present invention. DETAILED DESCRIPTION

[0028] 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 the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations (or steps) as sequential processes, many of the operations (or steps) therein can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the drawings; the process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0030] Embodiment 1: like Figure 1 As shown, this embodiment provides a protection method for a circuit breaker energy storage circuit, comprising the following steps: S100: Acquire historical operation data of the energy storage device, and acquire state characteristic factors in the historical operation data according to the state type.

[0031] In one embodiment, the state type is used to obtain the state characteristic factor in the historical operation data, which specifically includes the following steps: S111, acquiring historical operation data of the energy storage device, wherein the historical operation data at least includes historical energy storage time, historical current data, and historical status data; S112, extracting state features from historical state data to determine state type; S113, performing time-frequency analysis on the historical energy storage time and historical current data corresponding to the state type to determine the state characteristic factor; the state characteristic factor represents the change characteristics of the current data of the energy storage device under different state types within the energy storage time period.

[0032] In this embodiment, since the data corresponding to the state characteristic factor is the current data within the energy storage time period, the state characteristic factor can also represent the energy storage time period of the energy storage device.

[0033] S200, determining the real-time state type of the energy storage device according to the state characteristic factor and the collected real-time operation data of the energy storage device, when the real-time state of the energy storage device is judged to be energy storage completion, the energy storage device sends a signal to control the protection device and the detection device to start working.

[0034] In one embodiment, in order to determine the real-time state type of the energy storage device, this embodiment adopts a comparison analysis scheme, which specifically includes the following steps: S211, collecting real-time operation data of the energy storage device, wherein the real-time operation data at least includes real-time energy storage time and real-time current data; S212, performing time-frequency analysis on the real-time energy storage time and real-time current data to determine a real-time state characteristic factor; S213, comparing and analyzing the real-time state characteristic factor with the state characteristic factor to determine the real-time state type of the energy storage device; The real-time status type includes at least energy storage device abnormality, energy storage device energy storage completion, and energy storage device energy storage incomplete.

[0035] In this embodiment, the state characteristic factor represents the change characteristics of the current data of the energy storage device under different state types within the energy storage time period. Similarly, the real-time state characteristic factor represents the change characteristics of the real-time current data of the energy storage device under different state types within the energy storage time period. By comparing and analyzing the real-time state characteristic factor with the state characteristic factor, the real-time state type can be obtained according to the corresponding relationship between the state characteristic factor and the historical state type.

[0036] S300, after the protection device and the detection device are started, the protection device executes a protection action to cut off the power supply of the energy storage device; synchronously, the detection device collects the real-time energy storage data of the energy storage device and the historical energy storage data of the energy storage device to perform similarity analysis to determine the detection factor, and determines whether the energy storage device ends energy storage according to the detection factor.

[0037] In one embodiment, the detection factor is determined using a detection feature scheme, specifically comprising the following steps: S311, extracting action energy storage data corresponding to when the detection device performs a detection action from the historical energy storage data, and performing feature extraction on the action energy storage data to determine detection features; S312, performing a change trend analysis on the real-time energy storage data according to the detection feature to obtain a change trend of the real-time energy storage data, and determining a detection factor according to the change trend; The historical energy storage data at least includes historical temperature data of the energy storage device and historical energy storage spring pressure; The real-time energy storage data at least includes real-time temperature data of the energy storage device and real-time energy storage spring pressure.

[0038] In this embodiment, the detection feature intuitively represents the data change feature when the detection device performs a detection action, and based on the detection feature, the change trend analysis of the real-time energy storage data is performed to determine the detection factor, and the detection factor represents the data in the real-time energy storage data corresponding to the potential detection action.

[0039] In one embodiment, in order to determine whether the energy storage device has finished storing energy, this embodiment adopts a detection factor solution, which specifically includes the following steps: S321, extracting data corresponding to the detection factor from the real-time energy storage data and comparing it with a preset energy storage threshold, when the real-time energy storage data does not meet the energy storage threshold, determining that the energy storage condition of the energy storage device is unqualified and executing S322, otherwise the energy storage device ends energy storage; S322. Calculate the number of cycles for this time according to the preset number of cycles and the cycle formula. When the number of cycles for this time is less than or equal to the stop threshold, the energy storage device stops storing energy.

[0040] In this embodiment, the real-time energy storage data is screened by the detection factor to quickly and accurately find the corresponding data for the detection action that the detection device may perform, and compare the data with the preset energy storage threshold, wherein the preset energy storage threshold includes the working temperature range of the energy storage device and the energy storage spring pressure threshold. When the real-time energy storage data does not meet the energy storage threshold, the current cycle number is calculated according to the preset cycle number and cycle formula. If the current cycle number is less than or equal to the stop threshold, the energy storage device ends energy storage. If the current cycle number is greater than the stop threshold, the energy storage device starts to continue energy storage, and the protection device and the detection device act accordingly. Secondly, after the cycle judgment ends, the current cycle number replaces the original preset cycle number and becomes the new preset cycle number. The stop threshold and the preset cycle number for the first energy storage can be set manually or automatically according to the historical operation data of the energy storage device. The cycle formula is as follows: X = Ya; Wherein, X is the number of cycles, Y is the preset number of cycles, and a is the cycle coefficient; the cycle coefficient is a constant and can be set according to the actual working environment.

[0041] In one embodiment, in order to continuously monitor the pressure of the energy storage spring of the energy storage device after the energy storage device finishes storing energy, this embodiment adopts a cyclic detection solution, which specifically includes the following steps: The detection device detects the real-time energy storage spring pressure of the energy storage device according to a preset detection cycle cycle.

[0042] In this embodiment, the detection cycle of the detection device can be changed accordingly according to the actual working environment and the needs of the spring circuit breaker to adapt to the needs of different working environments, ensuring that the energy storage device can release the required energy at the first time when needed, and detecting the energy storage spring pressure in real time, so that potential faults of the energy storage device can be discovered during repeated detection processes; at the same time, the energy storage spring pressure is cyclically detected, and the energy storage strategy can be optimized to the greatest extent according to the changes of the spring under long-term conditions, thereby reducing the waste of energy storage resources and effectively improving the energy storage efficiency of the energy storage device.

[0043] This embodiment also provides a protection system for a circuit breaker energy storage circuit, including: Energy storage devices, protection devices, and detection devices; The first controlled end of the energy storage device is electrically connected to the first control end of the protection device, and the second controlled end of the energy storage device is electrically connected to the first control end of the detection device; The controlled end of the protection device is electrically connected to the second control end of the detection device; The first data acquisition terminal of the detection device is electrically connected to the first data monitoring terminal of the energy storage device, the second data acquisition terminal of the detection device is electrically connected to the second data monitoring terminal of the energy storage device, and the third data acquisition terminal of the detection device is electrically connected to the third data monitoring terminal of the energy storage device.

[0044] In this embodiment, the protection device is used to switch the circuit after the energy storage device completes energy storage to protect the energy storage device; the detection device can detect the real-time energy storage status of the energy storage device during the energy storage process of the energy storage device, promptly discover the fault of the energy storage device and cut off the circuit; at the same time, after the energy storage device completes energy storage, the detection device can monitor the real-time status of the energy storage device and optimize the subsequent energy storage strategy to effectively improve the energy storage efficiency of the energy storage device.

[0045] In one embodiment, in order to solve the energy storage problem of the energy storage device, this embodiment adopts an energy storage motor solution, which specifically includes: Energy storage motor and spring; The energy storage motor is mechanically connected to the spring, and the first controlled end of the energy storage motor is the first controlled end of the energy storage device, and the second controlled end of the energy storage motor is the second controlled end of the energy storage device. The current monitoring end of the energy storage motor is electrically connected to the first data monitoring end of the energy storage device, and the energy storage spring pressure monitoring end of the spring is electrically connected to the second data monitoring end of the energy storage device.

[0046] In this embodiment, the energy storage device is divided into two parts: an energy storage motor and a spring, and the energy storage action of the energy storage device is specifically that the energy storage motor starts to control the mechanical structure to compress the spring, so that the spring stores its own elastic potential energy.

[0047] In one embodiment, in order to visualize the working condition of the protection device, this embodiment adopts an indicator light solution, which specifically includes: AC contactor and indicator light; The first control end of the AC contactor is the first control end of the protection device, the second control end of the AC contactor is electrically connected to the controlled end of the indicator light, and the controlled end of the AC contactor is the controlled end of the protection device.

[0048] In this embodiment, the AC contactor is specifically Schneider RXM4AB2P7, and its principle is to control the contact points according to the electromagnetic force in the electromagnetic principle, thereby realizing the switching of the circuit on and off, and at the same time, using different contacts of the AC contactor to realize the interlocking between different devices, so as to achieve the effect of opening or closing different devices at the same time; the indicator light is specifically AD16-22DS (110-220V) type indicator light, and the indicator light can work after the protection device is activated, and visualize whether the protection device is started in the form of light.

[0049] In one embodiment, in order to monitor the real-time status of the energy storage device, this embodiment adopts a detection device solution, which specifically includes: Time relays, terminal sensors, controllers and control switches; The data acquisition end of the controller is electrically connected to the data collection end of the terminal sensor, the first control end of the controller is electrically connected to the controlled end of the control switch, and the second control end of the controller is electrically connected to the controlled end of the time relay; The control end of the time relay is the second control end of the detection device, and the collection end of the time relay is electrically connected to the third data monitoring end of the energy storage device as the third data collection end of the detection device; The control end of the control switch is the first control end of the detection device; The first data acquisition end of the terminal sensor is the first data acquisition end of the detection device, and the second data acquisition end of the terminal sensor is the second data acquisition end of the detection device.

[0050] In the present embodiment, the time relay is specifically Chint JSZ3A, and its principle is power-on delay, specifically, the time relay will delay for a period of time after being powered on before taking action. Such an action principle can associate the energy storage device with the circuit of the protection device, and control the energy storage working time of the energy storage device through the power-on delay principle of the time relay, disconnect the circuit as soon as the energy storage device completes energy storage, and effectively protect the energy storage device. In addition, in order to increase the success rate of the energy storage device to meet actual working needs with one energy storage, the setting time of the time relay is selected to be 30 seconds, which reserves sufficient energy storage time for the energy storage device. At the same time, the power-on delay principle of the time relay can automatically record and compare the energy storage time of the energy storage device; the terminal sensor is specifically a high-precision spring pressure sensor and a high-precision current sensor. The high-precision spring pressure sensor is installed in the energy storage device. The controller is specifically installed on the spring to monitor the pressure of the energy storage device after completing energy storage, and transmit the pressure data to the controller. The high-precision current sensor is connected in series with the energy storage device, specifically in series with the energy storage motor, to monitor the real-time current data of the energy storage device, and transmit the current data to the controller. The controller can be a single-chip microcomputer or a remote control platform, which is not specifically limited in this real-time example. After receiving the real-time current data, the controller will make a judgment based on the real-time current data and analyze the operating status of the energy storage device. After receiving the pressure data, the controller will make a judgment based on the pressure data and analyze the energy storage status of the energy storage device. At the same time, the controller controls the energy storage process of the energy storage device according to the analysis results. The control switch can be realized by a normally open or normally closed contact of a common protection device, or by an additionally adding a new switch or relay.

[0051] This embodiment has at least the following substantial effects: In this embodiment, the state characteristic factor is obtained according to the historical operation data of the energy storage device, and the data characteristics that affect the operation state of the energy storage device in the historical operation data can be obtained. The historical operation data corresponds to the real-time operation data and both act on the energy storage device, so the state characteristic factor can judge the abnormal data and abnormal type in the real-time operation data, and obtain the real-time state type of the energy storage device, so as to realize real-time monitoring of the energy storage process of the energy storage device, and effectively prevent the energy storage device from burning due to sudden abnormal current. Secondly, when the real-time state of the energy storage device is judged to be energy storage completion, the protection device is started to protect the energy storage device, and effectively prevent the energy storage device from being damaged by idling for a long time. In addition, the detection device is started at the same time as the protection device is started. The detection device performs similarity analysis on the real-time energy storage data and the historical energy storage data to determine the detection factor, and judges whether the energy storage device has finished energy storage according to the detection factor, so as to ensure that the energy storage of the energy storage device meets the requirements of the actual working conditions of the circuit breaker, effectively avoid the energy storage device being forced to power off and stop working before completing energy storage, and screen out energy storage devices with hidden dangers.

[0052] The above specific embodiments are preferred embodiments of the present invention, and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the present specific embodiments. All equivalent changes made in accordance with the shape, structure, and method of the present invention are within the protection scope of the present invention.

Claims

1. A protection method for a circuit breaker energy storage circuit, characterized in that: The method comprises the following steps: S100, obtaining historical operation data of the energy storage device, and obtaining state characteristic factors in the historical operation data according to the state type; S200, determining the real-time state type of the energy storage device according to the state characteristic factors and the collected real-time operation data of the energy storage device, and when the real-time state of the energy storage device is judged to be energy storage completion, the energy storage device sends a signal to control the protection device and the detection device to start working; S300, after the protection device and the detection device are started, the protection device performs a protection action to cut off the power supply of the energy storage device; Synchronously, the detection device collects the real-time energy storage data of the energy storage device and the historical energy storage data of the energy storage device to perform similarity analysis to determine the detection factor, and determines whether the energy storage device ends energy storage according to the detection factor.

2. A protection method for a circuit breaker energy storage circuit according to claim 1, characterized in that: In S100, the specific process of obtaining the historical operation data of the energy storage device and obtaining the state characteristic factor in the historical operation data according to the state type is as follows: S111, acquiring historical operation data of the energy storage device, wherein the historical operation data at least includes historical energy storage time, historical current data, and historical status data; S112, extracting state features from historical state data to determine state type; S113, performing time-frequency analysis on the historical energy storage time and historical current data corresponding to the state type to determine the state characteristic factor; The state characteristic factor represents the change characteristics of the current data of the energy storage device under different state types within the energy storage time period.

3. A protection method for a circuit breaker energy storage circuit according to claim 1, characterized in that: In S200, the specific process of determining the real-time state type of the energy storage device according to the state characteristic factor and the collected real-time operation data of the energy storage device is as follows: S211, collecting real-time operation data of the energy storage device, wherein the real-time operation data at least includes real-time energy storage time and real-time current data; S212, performing time-frequency analysis on the real-time energy storage time and real-time current data to determine a real-time state characteristic factor; S213, comparing and analyzing the real-time state characteristic factor with the state characteristic factor to determine the real-time state type of the energy storage device; The real-time status type includes at least energy storage device abnormality, energy storage device energy storage completion, and energy storage device energy storage incomplete.

4. A protection method for a circuit breaker energy storage circuit according to claim 1, characterized in that: In S300, the specific process of the detection device performing similarity analysis on the real-time energy storage data and the historical energy storage data to determine the detection factor is as follows: S311, extracting action energy storage data corresponding to when the detection device performs a detection action in the historical energy storage data, and performing feature extraction on the action energy storage data to determine detection features; S312, performing a change trend analysis on the real-time energy storage data according to the detection feature to obtain a change trend of the real-time energy storage data, and determining a detection factor according to the change trend; The historical energy storage data at least includes historical temperature data of the energy storage device and historical energy storage spring pressure; The real-time energy storage data at least includes real-time temperature data of the energy storage device and real-time energy storage spring pressure.

5. A protection method for a circuit breaker energy storage circuit according to claim 1 or 4, characterized in that: In S300, the specific process of judging whether the energy storage device has ended energy storage according to the detection factor is as follows: S321, extracting data corresponding to the detection factor from the real-time energy storage data and comparing it with a preset energy storage threshold, when the real-time energy storage data does not meet the energy storage threshold, determining that the energy storage condition of the energy storage device is unqualified and executing S322, otherwise the energy storage device ends energy storage; S322. Calculate the number of cycles for this time according to the preset number of cycles and the cycle formula. When the number of cycles for this time is less than or equal to the stop threshold, the energy storage device stops storing energy.

6. A protection method for a circuit breaker energy storage circuit according to claim 1, characterized in that: After S300 is finished, the detection device detects the real-time energy storage spring pressure of the energy storage device according to a preset detection cycle cycle.

7. A protection system for a circuit breaker energy storage circuit, applicable to a protection method for a circuit breaker energy storage circuit as claimed in any one of claims 1 to 6, characterized in that: Included are: Energy storage devices, protection devices, and detection devices; The first controlled end of the energy storage device is electrically connected to the first control end of the protection device, and the second controlled end of the energy storage device is electrically connected to the first control end of the detection device; The controlled end of the protection device is electrically connected to the second control end of the detection device; The first data acquisition terminal of the detection device is electrically connected to the first data monitoring terminal of the energy storage device, the second data acquisition terminal of the detection device is electrically connected to the second data monitoring terminal of the energy storage device, and the third data acquisition terminal of the detection device is electrically connected to the third data monitoring terminal of the energy storage device.

8. A circuit breaker energy storage circuit protection system according to claim 7, characterized in that: The energy storage device comprises: an energy storage motor and a spring; The energy storage motor is mechanically connected to the spring, and the first controlled end of the energy storage motor is the first controlled end of the energy storage device, and the second controlled end of the energy storage motor is the second controlled end of the energy storage device. The current monitoring end of the energy storage motor is electrically connected to the first data monitoring end of the energy storage device, and the energy storage spring pressure monitoring end of the spring is electrically connected to the second data monitoring end of the energy storage device.

9. A circuit breaker energy storage circuit protection system according to claim 7, characterized in that: The protection device includes: an AC contactor and an indicator light; The first control end of the AC contactor is the first control end of the protection device, the second control end of the AC contactor is electrically connected to the controlled end of the indicator light, and the controlled end of the AC contactor is the controlled end of the protection device.

10. A circuit breaker energy storage circuit protection system according to claim 7, characterized in that: The detection device includes: a time relay, a terminal sensor, a controller and a control switch; The data acquisition end of the controller is electrically connected to the data collection end of the terminal sensor, the first control end of the controller is electrically connected to the controlled end of the control switch, and the second control end of the controller is electrically connected to the controlled end of the time relay; The control end of the time relay is the second control end of the detection device, and the collection end of the time relay is electrically connected to the third data monitoring end of the energy storage device as the third data collection end of the detection device; The control end of the control switch is the first control end of the detection device; The first data acquisition end of the terminal sensor is the first data acquisition end of the detection device, and the second data acquisition end of the terminal sensor is the second data acquisition end of the detection device.

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