Sluice power loss emergency kit and application and method thereof

Abstract

The invention discloses a sluice power loss emergency kit and application and method thereof, and belongs to the technical field of emergency power supply. The water gate power loss emergency kit is of a modular combined structure and comprises an electric controller pack and a power battery pack which are independent from each other. A plurality of power battery monomers which are connected in series are arranged in the power battery pack, the power battery monomers are physically isolated by insulating partition plates to form an insulating block structure, and each power battery monomer is provided with an independent battery management subunit; a power-brake cooperative control unit is integrated in the electric controller pack, the input end of the power-brake cooperative control unit is in signal connection with the output end of the state monitoring unit, and the output end of the power-brake cooperative control unit is in control connection with the control end of the electric energy conversion unit and the control end of a built-in feedback resistor module of the electric controller pack. And a closed-loop cooperative control system is formed. The problem that traditional equipment cannot reach or is difficult to temporarily build is thoroughly solved, meanwhile, the time requirement for emergency opening and closing of a water gate is met, and flood risk expansion caused by deployment lag is avoided.

Description

Technical Field

[0001] This invention belongs to the technical field of emergency power supply, and in particular relates to an emergency package for sluice gate power failure and its application and method. Background Technology

[0002] In recent years, affected by global climate change, extreme weather events such as typhoons, torrential rains, and floods have occurred frequently, posing a severe challenge to the stability of water conservancy infrastructure. Under the influence of extreme weather, if the power supply system fails, sluice gates will be unable to open and close normally, seriously hindering flood control and drainage work and causing significant property damage.

[0003] Currently, there are two main types of emergency power supply modes for sluice gates in the industry, but both have significant drawbacks: Dual-circuit power supply mode: Equipped with dual circuits, but the overhead power grid is still susceptible to damage from disasters such as typhoons and earthquakes. In extreme weather conditions, both circuits may still fail simultaneously, making it impossible to form an effective emergency guarantee.

[0004] Diesel generator set power supply modes: This mode is further divided into stationary and towing types, both of which have unavoidable problems: Stationary diesel generator sets: The cost per unit is high, and a dedicated supporting building and fuel storage facilities are required. Not only is the initial investment and maintenance cost high, but the operation will also generate smoke and oil pollution, posing environmental pollution and safety hazards. At the same time, fixed installation cannot be flexibly deployed to other power outage sluice gates. Towed diesel generator sets: Each unit is expensive and requires a truck for transport. In extreme weather conditions that cause road blockages or bridge collapses, their weight of over 1,000 kilograms makes them impossible to reach the site. Even if they are successfully transported, they need to be rewired and debugged according to the complex electrical system (such as TN, IT, and TN-S systems) at the sluice gate site, which usually takes 1-3 hours to complete the deployment, far from meeting the time requirements for "emergency sluice gate opening and closing". In addition, the equipment is extremely unsuitable for mountainous and remote areas, where narrow roads and complex terrain exponentially increase the difficulty of towing and transporting.

[0005] Further analysis of the actual operation of the sluice gate reveals that the winches controlling the opening and closing of the sluice gate are mostly located at high places (such as the top of the gate pier or the upper floor of the gate opening and closing machine room). Traditional emergency power supply equipment is either too bulky to be moved to high places, or requires long cables for connection, which not only makes power distribution inconvenient, but also poses safety risks such as line wear and short circuits. Summary of the Invention

[0006] To address the technical problems existing in the background art, the present invention provides a sluice gate power failure emergency kit and its application and method.

[0007] The application adopts the following technical scheme: a sluice power failure emergency package, which is a modularized combined structure and comprises an electric control device package and a power battery package which are independent of each other, The electric control device package and the power battery package are both hand-held, The power battery package is internally provided with a plurality of power battery monomers connected in series, the power battery monomers are physically isolated through a carbon plate of a grid structure to form an insulating block structure, and each power battery monomer is provided with an independent battery management subunit. The electric control device package is internally integrated with a power-brake cooperative control unit, an input end of the power-brake cooperative control unit is in signal connection with an output end of a state monitoring unit, and an output end of the power-brake cooperative control unit is in control connection with a control end of an electric energy conversion unit and a control end of a feedback resistor module built in the electric control device package, thereby forming a closed-loop cooperative control system.

[0008] In a further embodiment, the power battery package and the electric control device package are detachably connected through a battery connection line set; the battery connection line set comprises a positive connection line and a negative connection line, wherein the positive connection line is used for adaptively connecting a positive interface of the power battery package and a positive interface of the electric control device package, and the negative connection line is used for connecting a negative interface of the power battery package and a negative interface of the electric control device package. The positive connection line and the negative connection line are respectively provided with a first color mark and a second color mark.

[0009] In a further embodiment, when , the power battery packages of adjacent two groups are detachably connected through a battery connection line set; the battery connection line set comprises three groups of first connection lines and one group of second connection lines, wherein the three groups of first connection lines are used for realizing series connection and / or parallel connection among the power battery packages to expand electric energy output, and the second connection line is used for realizing signal transmission among the power battery packages to realize cooperative control; when the power battery packages are not connected with each other, the power battery monomers in each power battery package are kept in a disconnected state of mutual insulation. The two terminal ends of the first connection line and the second connection line are respectively provided with different first color marks, second color marks and third color marks.

[0010] In a further embodiment, the positive interface, the negative interface and the signal interface on the power battery package are respectively provided with corresponding first color marks, second color marks and third color marks. The positive interface and the negative interface on the electric control device package are respectively provided with corresponding first color marks and second color marks. The terminal pins of each connection line and the jacks of the corresponding interfaces are designed in a mistake-proof plug structure with different shapes. ​

[0011] In further embodiments, the battery management subunit comprises: an electric quantity equalization module; the electric quantity equalization module is embedded with an autonomous equalization strategy, and the workflow of the autonomous equalization strategy is as follows: Real-time collection of cell voltages of each power battery pack , , represents the number of power battery cells in the power battery pack , is a time frame; based on the cell voltage , the average voltage of the power battery pack is calculated , an inductor is used as an energy transfer carrier to construct a lossless equalization circuit; the lossless equalization circuit is used to perform energy transfer on power battery cells with voltage deviation exceeding the standard in the power battery pack ; The voltage difference deviation of each power battery cell is defined , the calculated voltage difference deviation is compared with the equalization start threshold value respectively, when there is any , it is determined that the voltage consistency of the cells in the power battery pack does not meet the requirements, and the electric quantity equalization module is triggered to enter the equalization execution phase; During the execution process in the equalization execution phase, the above process is repeated with a time difference of until , the electric quantity equalization module automatically terminates the equalization operation.

[0012] In further embodiments, the battery management subunit comprises: a temperature control module; the temperature control module is embedded with a cooperative temperature control strategy, and the temperature control process of the cooperative temperature control strategy is as follows: Synchronous collection of core temperatures of power battery cells , ambient temperatures of the power battery pack , and shell temperatures of the power battery pack ; Create a temperature control trigger judgment condition, which includes a cell temperature judgment condition, an ambient temperature judgment condition, and a shell temperature judgment condition; if at least one of the temperature control trigger judgment conditions is met, it is determined that there is a temperature abnormality, and the temperature control module is triggered and the following steps are executed: Determine the temperature abnormality type based on the real-time temperature data set, and match the corresponding temperature control execution response according to the temperature abnormality type.

[0013] ​​In further embodiments, the power-brake coordination control unit takes the built-in feedback resistance module of the electric controller package as the core brake execution component, adapts to the performance requirements of the start-stop control and starting current and running current of the hoist-type opening and closing machine, and coordinates the following steps: receiving real-time working condition data, the real-time working condition data including: power battery pack discharge current , electric energy conversion unit output voltage , hoist machine opening and closing machine motor speed , and gate position signal ; judging whether the feedback resistance module needs to be triggered based on the real-time working condition data, the feedback resistance module being provided with an adjustable resistance; if so, calculating the optimal access resistance value of the adjustable resistance according to the real-time working condition data , the calculation formula being as follows: ; in the formula, is an adaptive coefficient, is motor back electromotive force, is rated running current; adopting a hierarchical switching circuit to realize smooth access of the adjustable resistance based on the optimal access resistance value .

[0014] In further embodiments, the switching process of the hierarchical switching circuit is as follows: setting a basic time unit, accessing in the first stage and lasting for 0.5-1 basic time units, realizing current buffering in the initial braking stage by multiplying the resistance value; after entering the second stage, accessing and lasting for 1-2 basic time units, gradually reducing the resistance value to enhance the braking efficiency; at the same time, judging whether the braking trend meets the expectation by monitoring the real-time change rate of the hoist machine opening and closing machine motor speed ; in the third stage, accessing until the gate position signal reaches a threshold value, and monitoring in real time during this period; if , then accessing for current limiting protection until , and switching back to .

[0015] In further embodiments, the electric controller package is provided with a one-key mechanical gate switch, the one-key mechanical gate switch adopting a mechanical lever type bidirectional operation structure: The switch is lifted upward to trigger the gate opening instruction, and the winch is synchronously driven to rotate, and the winch rotates in a forward rotation or a reverse rotation; The switch is pressed downward to trigger the gate closing instruction, and the winch stops rotating.

[0016] The water gate power failure emergency package is applied to the winch, and the winch drives the gate; the water gate power failure emergency package is as described above; The power source interface of the winch is matched with the output interface of the electric controller package, and mechanical and electrical double adaptation connection is realized through the standardized connection port and the switchable exchange connector. The exchange connector is internally provided with a forward and reverse rotation control switching module, and through the polarity reversing structure of the connector terminal and the direction control signal inside the electric controller package, the forward lifting control and the reverse descending control of the winch are quickly switched. The standardized connection port is provided with a mistaken insertion prevention positioning pin and an interface locking device.

[0017] The method for using the water gate power failure emergency package comprises the following steps: According to the rated power of the winch and the emergency operation time, the number I of power battery packages is determined; if I is greater than or equal to 2, the series / parallel connection and signal interconnection of the multiple power battery packages are completed through the battery connection line group with color identification and mistaken insertion prevention structure; The positive / negative electrode interfaces of the power battery package are detachably connected with the corresponding interfaces of the electric controller package through the battery connection line group with the first and second color identification, and the mistaken insertion is avoided through the interface shape difference design. The output interface of the electric controller package is connected with the power source interface of the winch through the standardized connection port and the switchable exchange connector; through the polarity reversing structure of the exchange connector and the signal of the electric controller package, the winch is set in the forward lifting mode or the reverse descending mode, the interface locking device is screwed and the mistaken insertion prevention positioning pin is confirmed to be in place. After self-checking, the one-key mechanical gate switch is lifted upward to start the gate operation, the real-time monitoring of the power battery package is realized through the battery management subunit, and the logic regulation and control are realized through the power-brake cooperative control unit. When stopping, the switch is pressed downward, or the control unit automatically executes the staged braking and current limiting protection.

[0018] The water gate power failure emergency package disclosed by the application has the advantages of practicality, adaptability to extreme scene application requirements and the following specific advantages: Break through the terrain and transportation restrictions: the emergency package adopts a modular portable design, the weight of a single module is much lower than that of a traditional traction towed diesel generator set, and it does not need to be matched with a truck for transportation. It can be manually carried to the top of the pier and the upper layer of the hoist room, and even in the extreme scene of road congestion, narrow terrain in mountainous areas or bridge collapse, it can still quickly reach the scene, completely solving the problem of traditional equipment that cannot reach or is difficult to temporarily build.

[0019] Shorten the deployment time: through color identification mistake-proof plug interface, standardized connection port and switchable switch connector, the traditional 1-3 hour wiring and debugging process is saved, the time requirement of emergency opening and closing of the water gate is met, and the risk of flood expansion caused by lagging deployment is avoided.

[0020] Adapt to the power demand of multiple scenes: support I≥1 group of power battery packs for flexible combination, and can expand power output through series / parallel connection to adapt to different power hoist machines and different emergency operation time requirements; at the same time, it is compatible with forward and reverse control of hoist machines (especially for 11kW three-phase asynchronous motors), without additional modification for water gate circuit system (T-N system, IT system, TN-S system), and has strong universality. For the extreme working condition of driving dozens of tons of gate (rated current 24A, starting instantaneous current 120-150A) by 11kW three-phase asynchronous motor, the application doubles the resistance to buffer the initial large current, gradually reduces the resistance to adapt to the operation demand, dynamically limits the current to ensure safety, avoids the impact of instantaneous large current on the battery and motor, and ensures smooth and non-stuttering gate starting, solving the technical defects that traditional emergency equipment cannot adapt to this working condition.

[0021] Ensure operation safety: the power battery pack adopts an insulated block structure and individual battery management, the electric control pack is equipped with graded braking and current limiting protection, and cooperates with the anti-misplug, interface locking design to effectively avoid safety risks such as line wear, short circuit, and instantaneous large current impact, and solve the safety hazards of traditional long pull power distribution.

[0022] In addition, the battery management subunit uses an inductive lossless equalization circuit for voltage deviation correction, avoiding overcharging and overdischarging of some batteries. Compared with traditional passive equalization technology, the overall capacity utilization rate of the battery pack is improved by 20%-30%; at the same time, the temperature regulation module synchronously monitors the battery core, environment and shell temperature, multi-dimensionally determines temperature abnormalities and matches response strategies, effectively preventing battery high-temperature bulging or low-temperature performance degradation, and adapting to complex environments such as high temperature, humidity and low temperature of water gates.

[0023] The insulating block structure of the power battery pack physically isolates each cell, so even if a single cell fails, it will not spread to the entire battery pack. Compared with the traditional series battery pack, where a single cell failure leads to total failure, the equipment safety redundancy is greatly improved. In addition, the independent management design of each cell can locate the faulty cell in real time, which is convenient for quick troubleshooting and repair, and avoids the paralysis of the entire emergency system due to battery problems.

[0024] By using the closed-loop linkage between the power-braking coordinated control unit and the feedback resistor module, combined with the smooth connection of the adjustable resistor through the graded switching circuit, it can not only adapt to the current performance requirements when the winch starts and stops, but also avoid the impact of instantaneous large current on the battery and motor. Compared with the rough power supply of traditional emergency power supply, it ensures that the gate opening and closing process is smooth and without jamming.

[0025] Based on real-time collected operating data such as battery discharge current, output voltage, and motor speed, the system calculates the optimal resistance value of the feedback resistor in real time and adjusts it dynamically. At the same time, it compensates for performance fluctuations caused by changes in battery charge through the SOC adaptive coefficient, ensuring that the power supply and braking performance always match the winch's needs under different remaining charge levels and different gate positions. This solves the technical defects of traditional emergency equipment with fixed power output that cannot adapt to changes in operating conditions.

[0026] Finally, the standardized connector's anti-misinsertion positioning pins ensure accurate physical docking, the interface locking device prevents vibration from loosening, the polarity reversal structure of the interchangeable connectors ensures correct electrical polarity, and the signal feedback contacts monitor the connection status in real time. Compared with the traditional connection method that relies solely on cable plugging and unplugging, the interface contact failure rate is reduced by 90%, avoiding power outages or control signal loss due to connection problems. Attached Figure Description

[0027] Figure 1 This is a connection diagram between the electronic controller pack and a set of power battery packs in Example 1.

[0028] Figure 2 This is a diagram showing the connection relationship between the electronic controller pack and the two power battery packs in Example 1.

[0029] Figure 3 This is a structural diagram of the composite conductive connector sheet in Example 2.

[0030] Figure 4 This is a flowchart of the emergency method for the sluice gate power failure emergency kit in Example 4.

[0031] Figures 1 to 3 The labels in the document are as follows: 1. Electronic controller pack; 2. Power battery pack; 3. Positive connection wire; 4. Negative connection wire; 5. Positive interface; 6. Negative interface; 7. First connection wire; 8. Second connection wire; 9. One-button mechanical gate switch; 10. Standardized interface; 201. Connecting piece body; 202. Pure nickel sheet. Detailed Implementation

[0032] The application will be further described below in conjunction with the accompanying drawings and examples.

[0033] Example 1 The water gate power failure emergency package is a modular combination structure. It is further understood that the independent electric control package and The electric control package and the power battery package are both hand-held, In order to facilitate operation and lifting, the weight of the single package of the electric control package and the power battery package in this embodiment is only 20KG. Even in the case of circuit breakage and network breakage, it can be manually carried or delivered by a drone to power the water gate hoist to open the gate. The water gate hoist of this embodiment is equipped with an 11-kilowatt three-phase asynchronous motor, which can drive a gate weighing dozens of tons. The following technical description is described around this scenario.

[0034] Further, the power battery package is provided with a plurality of power battery monomers in series, the power battery monomers are physically isolated by insulating partitions, forming an insulating partition structure, and each power battery monomer is provided with an independent battery management subunit. For example, in this embodiment, the voltage of the power battery monomer of the water gate power failure emergency package is controlled to be 3.2-4.1V, and the current is 5A. This voltage interval not only meets the safe working range of the power battery monomer and can avoid the problem of bulging caused by overcharging and overdischarging, but also provides basic support for the voltage output of the overall power supply scheme.

[0035] In this embodiment, considering that the power battery monomer will generate heat in actual use, and the vibration in the moving process is easy to cause the monomer to shake, and the conventional insulating partition is difficult to solve these two problems at the same time, therefore, this embodiment adopts a carbon plate with a mesh structure as an insulating partition, and a single power battery monomer is correspondingly embedded in the grid to realize accurate positioning. The carbon plate with a mesh structure not only dissipates the heat generated by the power battery monomer during operation quickly due to its own ventilation, avoiding local high-temperature accumulation, but also has good elastic deformation ability, which can absorb vibration energy through its own deformation, reduce the shaking of the power battery monomer to reduce the risk of structural wear and tear, and at the same time, experiments have verified that it can withstand a high-temperature environment of 300℃, which can effectively avoid safety hazards such as insulation failure and structural deformation caused by high temperature. Based on the above outstanding advantages, in other embodiments, the carbon plate with a mesh structure is further applied to the high-voltage capacitor of the inverter and the inverter system. Its insulation characteristics, heat dissipation capacity and buffering performance can adapt to the heat generation demand of the high-voltage capacitor during work, while resisting the vibration impact during the operation of the inverter system, thereby improving the stability and service life of the entire power equipment.

[0036] Based on the above monomer voltage, this embodiment adopts a 198 string three parallel connection scheme: 198 monomers are connected in series to increase the total voltage, and 3 monomers are connected in parallel to ensure the current output capability, finally realizing a direct current output of 675V-680V, and the output current of the power battery pack can reach 10-15A; After matching with the inverter, the direct current voltage can be converted into 380V-417V alternating current, which adapts to the power demand of an 11-kilowatt three-phase asynchronous motor, and meets the bearing capacity of 120-150A instantaneous starting current.

[0037] Further, this embodiment constructs a comprehensive safety protection system in the battery module box for a large number of monomers: an independent signal acquisition end is configured for each power battery monomer, combined with the "198 string three parallel" combination form, nearly 600 signal acquisition points are formed, which can acquire the voltage, current and state data of each monomer in real time; At the same time, it adapts to the demand of six detection heads of solid-state battery, carries the BMS management system supporting 200 strings, realizes the accurate monitoring of the running state of the whole power battery pack and the monomer through multi-channel signal integration, avoids the safety risk caused by the fact that the abnormal local monomer is not found, and especially guarantees the stability of the battery during instantaneous large current starting.

[0038] The power-brake cooperative control unit is integrated inside the electric control pack, the input end of the power-brake cooperative control unit is in signal connection with the output end of the state monitoring unit, the output end thereof is in control connection with the control end of the electric energy conversion unit and the control end of the feedback resistance module built-in the electric control pack, thereby forming a closed-loop cooperative control system, which is specially designed for the regulation and control logic of the instantaneous large current working condition of the 11-kilowatt three-phase asynchronous motor.

[0039] In the emergency scene of water gate power failure caused by extreme weather, the water gate emergency power supply package needs to build a power supply loop through the rapid assembly of the electric control pack and the power battery pack, so as to provide power for the winch type hoist (11-kilowatt three-phase asynchronous motor) in time. At the same time, the water gate emergency operation site environment is complex (such as rainwater immersion, muddy interference), and the operator needs to quickly complete the connection in a tense emergency atmosphere. If there is no clear distinguishing feature of the interface, it is easy to misplug, further exacerbating the problems of slow deployment and high risk. In addition, the traditional connection mode does not consider the demand of quick disassembly, repeated use under water conservancy emergency scene, and the interface wear resistance and adaptability are poor, and after repeated use, poor contact may occur, leading to power interruption and affecting the continuity of the gate opening and closing.

[0040] Therefore, in order to solve this technical problem, the power battery pack 2 and the electric controller pack 1 are detachably connected through the battery connection line group. The battery connection line group includes a positive connection line 3 and a negative connection line 4. The positive connection line is used to realize the adaptive connection of the positive interfaces of the power battery pack and the electric controller pack. The negative connection line is used to realize the connection of the negative interfaces of the power battery pack and the electric controller pack. The positive connection line and the negative connection line are respectively marked with a first color mark and a second color mark. Figure 1 As shown, the positive connection line is marked with orange, and the negative connection line is marked with black.

[0041] Correspondingly, the positive interface 5 and the negative interface 6 on the power battery pack are respectively marked with the first color mark and the second color mark. The positive interface and the negative interface on the electric controller pack are respectively marked with the first color mark and the second color mark.

[0042] In combination with the above examples and Figure 1 That is, the positive interface and the negative interface in the embodiment are respectively marked with orange and black. When the power supply circuit of the water gate emergency power supply pack is built, the operator can quickly complete the connection through the intuitive matching mode of "line-port color one-to-one correspondence". Holding the orange-marked positive connection line, aligning one end of the positive connection line with the orange-marked positive interface on the power battery pack, and aligning the other end of the positive connection line with the orange-marked positive interface on the electric controller pack, the positive circuit can be built by directly plugging. Similarly, the black-marked negative connection line is connected to the black negative interfaces of the power battery pack and the electric controller pack, and there is no need to additionally check the circuit diagram or interface parameters.

[0043] In another embodiment, if there are at least two groups of fixed power battery packs, the circuit between the two groups of fixed power battery packs needs to be built. Considering the above problems, the embodiment provides the following technical solutions: the battery connection line group includes three groups of first connection lines 7 and one group of second connection lines 8. The three groups of first connection lines are used to realize the series connection and / or parallel connection between the power battery packs to expand the power output (to meet the different operation time requirements of the 11-watt motor). The second connection line is used to realize the signal transmission between the power battery packs to realize cooperative control. When there is no connection relationship between the power battery packs, the power battery cells in each power battery pack remain in the disconnected state of mutual insulation. The two terminal ends of the first connection line and the second connection line are respectively marked with different first color marks, second color marks, and third color marks.

[0044] As Figure 2 The embodiment continues Figure 1The color mark in the first connecting line is orange, and the second color mark is black, which are used for connecting the positive and negative interfaces on the power battery pack.

[0045] Correspondingly, the second connecting line is used for signal transmission, and the third color mark is blue to further distinguish.

[0046] In the power supply circuit construction of the sluice emergency power supply kit, only relying on color marks can solve the problem of rapid identification, but in extreme emergency scenarios (such as dim operating environment after a typhoon, rainwater erosion leading to decreased hand operation stability, and operating personnel wearing gloves), visual judgment deviation or accidental touch may still cause wiring misplacement. Therefore, the embodiment further designs a mistake-proof insertion structure for the shape difference between the connector pin of each connecting line and the corresponding interface jack based on color marks.

[0047] For example, the positive connection line with orange mark adopts a triangular distribution structure with one long and two short pins, and the corresponding power battery pack and electric control kit have an orange positive interface with a dedicated jack matching the triangular distribution. If the positive connection line is mistakenly connected to the negative interface (the jack has a linear distribution with two long and one short pins), the pin and the jack will not be compatible and cannot be inserted. Similarly, the negative connection line with black mark has a round positioning column and two flat tab structures, which can only be adapted to the negative interface jack with the same shape.

[0048] This shape physical locking design completely eliminates the possibility of misinsertion from the structural level: even if the operator mistakenly connects the orange line to the black interface or confuses the positive and negative connection sequence due to environmental interference, the pin and the jack will not be compatible and cannot be inserted, without the need for visual secondary confirmation, further improving the safety of the connection.

[0049] Although the insulation partition structure of multiple power battery monomers solves the problem of "all or nothing" in traditional series battery packs, in the sluice emergency power supply scene, multiple monomers in series still face two major challenges: first, during long-term charging and discharging, the voltage of each monomer may not be consistent due to material characteristics and differences in charging and discharging depth, which may lead to overcharging (shortening the service life) or overdischarging (affecting the power supply power) of some monomers, thereby weakening the overall output stability of the power battery pack and making it difficult to adapt to the demand for 380V alternating current and 120-150A instantaneous current of 11-kilowatt three-phase heavy asynchronous motor of the hoist type opening and closing machine; second, traditional battery equalization schemes mostly use resistance energy dissipation design, and energy loss is often as high as 10%-20%. In the sluice emergency scenario, battery energy needs to be maximized (such as supporting 7.5-kilowatt sluice continuous opening and closing of 8 holes), and high energy consumption will directly shorten the emergency power supply time, which cannot meet the long-term operation demand in extreme weather.

[0050] In further embodiments, the battery management subunit comprises: a power balance module; the power balance module embeds an autonomous balancing strategy, whose workflow is as follows: Real-time collection of battery monomer voltage of each power battery pack , , represents the number of power battery monomers in the power battery pack , is the time frame; based on the monomer voltage , the average voltage of the power battery pack is calculated , the inductance is used as the energy transfer carrier to construct a lossless balancing circuit; the lossless balancing circuit is used to perform energy transfer on the power battery monomer whose voltage deviation exceeds the standard in the power battery pack ; specifically, if , the MOSFET switch in the control circuit is turned on, so that the monomer forms a charging circuit with the inductance, and the excess energy of the monomer is stored in the inductance in the form of magnetic field energy; if , the MOSFET switch state is switched, so that the inductance forms a discharging circuit with the monomer, and the magnetic field energy stored in the inductance is released to supplement the power of the monomer; the whole process has no resistance energy consumption, ensuring that the total energy loss of the power battery pack during the balancing stage is ≤3%.

[0051] Further, the calculation formula of the average voltage in the embodiment is as follows: , N is the total number of power battery monomers.

[0052] The voltage difference deviation of each power battery monomer is defined, and the voltage difference deviation quantifies the voltage consistency degree between different power battery monomers in the same power battery pack; the calculated voltage difference deviation is compared with the balancing start threshold respectively, and when there is any , the power balance module is triggered to enter the balancing execution stage; During the execution process in the balancing execution stage, the above-mentioned monomer voltage collection, average voltage calculation and voltage difference deviation determination steps are repeated with a time difference of until , the power balance module automatically terminates the balancing operation, and feeds back the "balancing completed" state signal of the power battery pack to the state monitoring unit of the electric control pack, and synchronously updates the power state data of the power battery pack, so as to ensure that it is a 380V alternating current for a 11kW three-phase heavy-duty asynchronous motor of the winding type opening and closing machine.

[0053] In a further embodiment, voltage difference deviation The formula for obtaining it is as follows: = .

[0054] Considering the large temperature fluctuations (-10℃~45℃) in emergency sluice gate scenarios, low temperatures (≤0℃) will cause a sharp drop in battery discharge efficiency, making it impossible to stably supply power to the 18 kW three-phase heavy-duty asynchronous motor of the hoist-type gate opener; high temperatures (≥40℃) are prone to causing battery thermal runaway risk, affecting equipment safety.

[0055] Therefore, the battery management subunit of this embodiment includes: a temperature control module; the temperature control module is embedded with a collaborative temperature control strategy, and the temperature control process of the collaborative temperature control strategy is as follows: Synchronous acquisition of power battery pack Power battery cells Power battery cells Core temperature Power battery pack ambient temperature and outer casing temperature ; Create temperature control trigger conditions, which include: individual unit temperature determination conditions, ambient temperature determination conditions, and casing temperature determination conditions.

[0056] In this embodiment, the monomer temperature determination condition is further understood as: ,in The preset deviation temperature threshold is typically set to 8℃. For power battery cells The temperature deviation value is calculated using the following formula: Optimal performance temperature under normal conditions The value is 25℃.

[0057] The conditions for determining ambient temperature are further expressed as follows: ;in, The minimum temperature threshold for optimal discharge efficiency is typically set to 0℃. This is the maximum temperature threshold for optimal discharge efficiency, typically set at 40℃.

[0058] The conditions for determining the shell temperature are further expressed in the following form: or ;in, The safe temperature threshold for the outer casing is set to 35°C in this embodiment. a preset rate of change of the temperature of the housing, such as , a rate of change of the actual temperature of the housing, calculated as: wherein is the temperature of the outer housing.

[0059] If at least one of the cell temperature determination condition, the ambient temperature determination condition, and the housing temperature determination condition is met, it is determined that there is a temperature anomaly, a temperature control module is triggered, and the following steps are performed: Based on a real-time temperature data set (i.e., including: a core temperature of the power battery pack , an ambient temperature of the power battery pack, and an outer housing temperature , a temperature anomaly type is determined, and a corresponding temperature control execution response is matched according to the temperature anomaly type; the temperature control execution response includes: a temperature rise response and a temperature drop response.

[0060] In order to facilitate understanding and better understanding the technical solutions of the present embodiment, when it is determined that there is a temperature anomaly, a temperature anomaly type is further analyzed according to a temperature control trigger determination condition, and the specific analysis process is as follows: If only the ambient temperature determination condition is met, and , it is determined that there is a low-temperature anomaly, which will cause the overall discharge efficiency of the power battery pack to decrease and be unable to meet the core requirement of providing reliable emergency power supply for the drum-type opening and closing machine, and may exacerbate the battery capacity decay at low temperature.

[0061] If any one of the following determination conditions is met, it is determined that there is a high-temperature anomaly: one, the ambient temperature determination condition is met and ; two, the cell temperature determination condition is met, indicating that the overall heat dissipation efficiency of the battery pack is insufficient or there is a local abnormal heat generation inside.

[0062] If only the cell temperature determination condition is met, and the ambient temperature determination condition is not met, i.e. , it is determined that there is a normal-temperature deviation anomaly: the anomaly is caused by uneven heat dissipation of each cell in the power battery pack, although it does not affect the overall discharge efficiency, it will cause inconsistent cell capacity decay, and may shorten the cycle life of the battery pack in the long term.

[0063] According to the above temperature anomaly type, a corresponding temperature control execution response is matched, and further, for the low-temperature anomaly, a temperature rise response is performed: a PTC heater built-in the temperature control module is started, a stepwise power output mode is adopted, an initial power is set to 50W, and every 100ms, the power is adjusted by 5W according to , so as to promote the power battery cell core temperature to rebound to the optimal temperature interval of 25℃. ​

[0064] For high temperature anomaly, perform temperature reduction response: start semiconductor refrigerator and form forced convection heat dissipation system with heat equalizing fan, optimize temperature distribution in the box through the heat equalizing fan. If 4 temperature measuring heads are configured for each battery module and are evenly distributed at the four corners of the box, the internal temperature of the module can be monitored without dead angle; when the temperature measuring head detects that the temperature exceeds 65℃, the BMS management system immediately sends a temperature alarm signal and triggers the pre-installed BMS high-voltage DC relay in the box to execute the trip action, cutting off the power supply circuit to prevent high temperature from causing the battery to bulge or thermal runaway.

[0065] For normal temperature deviation anomaly, perform temperature equalization response: start the heat equalizing fan to balance the temperature in the power battery pack at 500rpm~2000rpm adjustable speed, reduce the single cell temperature difference to ≤5℃, and ensure the consistency of the capacity attenuation of each single cell.

[0066] Through low-temperature PTC step-up and high-temperature forced convection heat dissipation, the battery pack can stably output in the environment of-10℃~45℃, meet the demand of 380V AC for the winch type opening and closing machine, and meet the performance index of strong environmental adaptability.

[0067] For normal temperature deviation anomaly, start the heat equalizing fan (temperature difference control ≤5℃) to avoid inconsistent capacity attenuation of single cells due to uneven temperature, meet the index of "60% capacity after 8A charging / 40A discharging cycle 400 times at 25℃", and further prolong the cycle life of the battery by more than 20%.

[0068] In another embodiment, the winch type opening and closing machine is prone to produce instantaneous large current (such as 120A starting current) when starting and stopping, and the traditional brake directly connected to the fixed resistor is easy to cause the current to rise suddenly, which may cause the power battery pack (supporting 5C continuous discharge and 40C pulse discharge) and the motor winding to be impacted, which may cause battery overload protection or motor failure, and cannot adapt to the reliable power supply demand in emergency scenes.

[0069] Therefore, the power-brake cooperative control unit is introduced in the embodiment, which takes the feedback resistor module built-in the electric control unit as the core brake execution component, adapts to the starting and stopping control of the winch type opening and closing machine and the performance demand of starting current and running current, and the cooperative steps are as follows: Receive real-time working condition data, which includes: power battery pack discharge current , electric energy conversion unit output voltage , winch machine opening and closing machine motor speed , and gate position signal ; judging whether the feedback resistance module needs to be triggered based on the real-time working condition data, wherein an adjustable resistance is arranged in the feedback resistance module; the condition that the feedback resistance module needs to be triggered in the embodiment is generally that the motor rotating speed of the hoist machine deviates from the specified range, the output voltage of the electric energy conversion unit deviates from the specified range, etc.

[0070] If needed, the optimal access resistance value of the adjustable resistance is calculated according to the real-time working condition data , and the calculation formula is as follows: ; in the formula, is the adaptive coefficient, is the motor back electromotive force, is the rated operating current ; based on the optimal access resistance value , the adjustable resistance is accessed in stages. The smooth access of the adjustable resistance is realized by using a staged switching circuit.

[0071] Further, the switching process of the staged switching circuit is as follows: The basic time unit is set, and in the first stage, is accessed and lasts for 0.5-1 basic time unit, and the current buffer in the initial braking stage is realized by multiplying the resistance value; for example, the basic time unit is 0.5-1 second. The current is prevented from rising suddenly due to the traditional fixed resistance, the 120A starting current demand of the hoist machine is adapted, the power battery pack (5C continuous discharge and 40C pulse discharge) and the motor winding are protected, the battery overload protection or motor failure is prevented, and the emergency power supply reliability is ensured.

[0072] After entering the second stage, is accessed and lasts for 1-2 basic time units, the resistance value is gradually reduced to enhance the braking efficiency; at the same time, the change rate of the hoist machine motor rotating speed is monitored in real time to judge whether the braking trend meets the expectation; the braking process is ensured to be stable, and the hoist machine start-stop control and current performance demand in the emergency scene are met.

[0073] In the third stage, is accessed and lasts until the gate position signal reaches the threshold value, and during this period, is monitored in real time; if , then is accessed for current limiting protection until , and is switched back to complete dynamic monitoring.

[0074] Further, when the output current of the power battery pack is monitored to exceed 120A (instantaneous value), the high-voltage DC relay is tripped synchronously to avoid line burning or single cell damage caused by large current impact; when the voltage of the power battery cell is monitored to be lower than 3.5V, the system automatically enters a low-voltage protection mode to limit the output current to avoid over-discharge; when the voltage of the single cell is further lower than 3.4V, the system sends a low-voltage warning signal to remind the operator to terminate power supply or supplement the power in time, thereby ensuring the safe operation of the power battery pack from the electrical protection aspect and ensuring the stable output of 675V-680V DC power, thereby providing a reliable basis for the subsequent conversion of 380V-417V AC power by the inverter and the adaptation to the power supply demand of the hoist type gate hoist.

[0075] Further, in order to prevent misoperation, the electric control device is provided with a one-key mechanical gate switch 9, which adopts a mechanical lever type bidirectional operation structure. When the switch is lifted upward, the gate opening instruction is triggered, and the hoist is synchronously driven to rotate, and the rotation of the hoist is forward rotation or reverse rotation; when the switch is pressed downward, the gate closing instruction is triggered, and the hoist stops rotating.

[0076] The mechanical lever type bidirectional operation (lift open and press close) is adopted, the operation logic directly corresponds to the “opening-closing” action of the gate, no additional learning is needed, the problem of easy confusion of traditional multiple keys or complex knobs is avoided, especially suitable for the situation that the operator is nervous and the operation time is limited in an emergency scene, and the probability of misoperation is greatly reduced.

[0077] The switch action directly triggers the gate opening and closing instruction, no intermediate complex signal conversion is needed, the “3-second fast response” characteristic of the emergency package is realized, the hoist can be quickly started or stopped, the gate is avoided to be over-positioned due to operation delay, or the opportunity of emergency power supply is delayed, which meets the core demand of “emergency opening and closing” after the water gate loses power.

[0078] Embodiment 2 Based on the water gate power loss emergency package disclosed in embodiment 1, the power battery cell selected in this embodiment is optimized in structure and material to solve the pain point of the fixed battery drum. The specific implementation is as follows: In order to maintain the reliability of series and parallel connection, this embodiment adopts a composite conductive connecting sheet, the structure of which is shown in Figure 3 The alloy silver connecting sheet body 201 has high strength characteristics to solve the defect of insufficient connection strength of pure silver, and has low conductive impedance, which can significantly reduce the heat generated during large current transmission. As shown in the figure, a plurality of welding positions matched with the power battery tab are arranged on the alloy silver connecting sheet body, and anti-skid tooth patterns are designed at the edges of each welding position to ensure the connection stability when welding with pure nickel sheet. At the same time, the connecting sheet body 201 is provided with a hollow area, which not only reduces the weight of the connecting sheet body, but also provides expansion space for the battery drum.

[0079] Further, a pure nickel sheet 202 is pre-welded at the tab of the power battery cell, and the pure nickel sheet 202 is connected with the battery stainless steel shell through a laser welding process, with a welding depth of 2 mm, to ensure the welding firmness and avoid welding failure caused by long-term vibration or battery expansion.

[0080] The alloy silver connecting sheet and the pure nickel sheet are pre-integrated through an ultrasonic welding process to form a low-impedance conductive channel (welding resistance ≤ 5 mΩ), ensuring the stability and low heat generation when transmitting large current (10-15 A / module).

[0081] The composite conductive connecting sheet adopts a bridging arc structure. When the power battery cell expands, the sinking welding part can provide an expansion space of ≥ 3 mm, avoiding the breakage or extrusion of the connecting sheet on the battery shell, and structurally adapting to the physical changes of the battery bulge, thereby ensuring the long-term reliability of the series and parallel connection.

[0082] In a further embodiment, the single battery is fixed by a nylon-made bolt, which has high strength and insulation properties, and can avoid the risk of electric conduction of metal bolts, thereby providing a basic guarantee for the electrical safety of the battery series and parallel connection. At the same time, through the lengthening design of the nylon bolt, the battery is directly connected with the aluminum alloy box body, realizing the overhead installation of the battery (the distance between the bottom of the battery and the box body is ≥ 10 mm), and reducing the heat accumulation at the bottom.

[0083] In view of the problem of bottom weight sinking caused by overhead installation, a high-strength high-temperature-resistant foaming agent (temperature resistance ≥ 150℃, compressive strength ≥ 2MPa) is injected into the bottom of the aluminum alloy box body to improve the overall stability of the module. In addition, 1 / 3 of the space is reserved on the side of the aluminum alloy box body to form a cooling air return groove. When the air naturally convection, it can effectively take away the heat inside the module, further improving the heat dissipation efficiency, and realizing the dual protection of anti-bulging and strong heat dissipation from the physical structure.

[0084] Embodiment 3 The water gate power failure emergency package disclosed in embodiment 1 is applied to a winch, the power source interface of the winch is adapted to the output interface of the electric control device package, and the mechanical and electrical dual adaptation connection is realized through the standardized connection port 10 and the switchable exchange connector; the standardized interface 10 of the embodiment includes adapted A-phase, B-phase and C-phase three-phase live wire interfaces, which correspond to red, green and yellow marks respectively, and are used for connecting the three-phase power input of the asynchronous motor of the winch; at the same time, a small grounding interface is provided, which is connected with the metal shell of the winch through a yellow-green grounding wire, thereby ensuring the electrical safety.

[0085] The switching joint is internally provided with a forward and reverse control switching module, which realizes quick switching of forward lifting control and reverse descending control of the hoist through a polarity reversing structure of the joint terminal and a direction control signal inside an electric control box.

[0086] Through the above technical solution, the mechanical stability and electrical reliability of the emergency package connected with the hoist are ensured, and the signal feedback contact is integrated at the connection port, so that the connection state can be monitored in real time and fed back to the power-brake cooperative control unit.

[0087] Embodiment 4 In combination Figure 4 The embodiment discloses an emergency method of a sluice power failure emergency package, including the following steps: According to the rated power of the hoist and the emergency operation time, the number I of power battery packs is determined; if I≥2, the series / parallel connection and signal interconnection of multiple power battery packs are completed through the battery connection line group with color identification and error-proof insertion structure; The positive / negative electrode interfaces of the power battery pack are detachably connected with the corresponding interfaces of the electric control box through the battery connection line group with first and second color identification, and the error insertion is avoided through the interface shape difference design; The output interface of the electric control box is connected with the power source interface of the hoist through the standardized connection port and the switchable switching joint; through the polarity reversing structure of the switching joint, the hoist is set in the forward lifting mode or the reverse descending mode in cooperation with the signal of the electric control box, the interface locking device is tightened, and the error-proof positioning pin is confirmed to be in place; After self-checking, the one-key mechanical gate switch is lifted to start the gate operation, the real-time monitoring of the power battery pack is realized by the battery management subunit, and the logic response to the 120-150A instantaneous starting current is realized by the power-brake cooperative control unit; meanwhile, the real-time monitoring (such as voltage and temperature) of the power battery pack is realized by the battery management subunit, and the logic regulation and control are realized by the power-brake cooperative control unit.

[0088] When stopping, the switch is pressed downward, or the control unit automatically executes the staged braking and current limiting protection, so as to ensure that the dozens of tons of weight gate stops stably and avoids mechanical impact caused by sudden stop.

Claims

1. An emergency kit for power failure at a sluice gate, characterized in that: The sluice gate power failure emergency kit is a modular assembly, comprising: independent electrical controller packages and... The power battery pack, including both the electronic controller pack and the power battery pack, is a portable type. ; The power battery pack contains multiple power battery cells connected in series. Each power battery cell is physically isolated from the others by a carbon plate with a grid structure, forming an insulated block structure. Each power battery cell is equipped with an independent battery management subunit. The electronic controller package integrates a power-braking coordinated control unit. The input terminal of the power-braking coordinated control unit is connected to the output terminal of the status monitoring unit, and its output terminal is connected to the control terminal of the power conversion unit and the control terminal of the feedback resistor module built into the electronic controller package, forming a closed-loop coordinated control system.

2. The emergency power failure kit for a sluice gate according to claim 1, characterized in that, The power battery pack and the electronic controller pack are detachably connected via a battery connector cable assembly. The battery connector cable assembly includes a positive connector cable and a negative connector cable, wherein the positive connector cable is used to adapt the positive interface of the power battery pack to the positive interface of the electronic controller pack, and the negative connector cable is used to connect the negative interface of the power battery pack to the negative interface of the electronic controller pack. The positive and negative terminals are respectively assigned a first color identifier and a second color identifier.

3. The emergency power failure kit for a sluice gate according to claim 1, characterized in that, when When adjacent groups of power battery packs are connected in a detachable manner via battery connection wires, the battery connection wires include: three sets of first connection wires and one set of second connection wires, wherein the three sets of first connection wires are used to realize series connection and / or parallel connection between power battery packs to expand power output, and the second connection wires are used to realize signal transmission between power battery packs to achieve coordinated control; when there is no connection between power battery packs, the power battery cells inside each power battery pack remain in an insulated and disconnected state. The two connector terminals of the first connecting line and the second connecting line are respectively assigned different first color markings, second color markings and third color markings.

4. A sluice gate power failure emergency kit according to any one of claims 2 or 3, characterized in that, The positive terminal, negative terminal, and signal terminal on the power battery pack are respectively identified by the first color, the second color, and the third color. The positive and negative terminals on the electronic controller package are respectively identified by the first and second color codes. The connector pins of each connecting cable and the corresponding interface socket adopt a shape-differentiated anti-misinsertion structure design.

5. The emergency power failure kit for a sluice gate according to claim 1, characterized in that, The battery management subunit includes a power balancing module; the power balancing module embeds an autonomous balancing strategy, and its workflow is as follows: Real-time acquisition of individual cell voltages from each power battery pack , , Indicates the power battery pack The serial number of the internal power battery cell, For time frames; based on individual cell voltages Calculation of power battery pack average voltage A lossless balancing circuit is constructed by using an inductor as the energy transfer carrier; the lossless balancing circuit is then used to balance the power battery pack. Power battery cells with excessive voltage deviation within the specified range will undergo energy transfer. Define each power battery cell Voltage difference deviation The calculated voltage difference deviation Respectively with the balanced start threshold To make a comparison, when there exists any If the voltage consistency of the individual cells in the power battery pack is determined to be unsatisfactory, the power balancing module is triggered to enter the balancing execution phase. During the balanced execution phase, the execution process continues with Repeat the above process until the time difference is reached. The power balancing module automatically terminates the balancing operation.

6. The emergency power failure kit for a sluice gate according to claim 1, characterized in that, The battery management subunit includes a temperature control module; the temperature control module embeds a collaborative temperature control strategy, and the temperature control process of the collaborative temperature control strategy is as follows: Synchronous acquisition of power battery pack Power battery cells Core temperature Power battery pack ambient temperature and outer casing temperature ; A temperature control trigger condition is established, which includes: unit temperature determination condition, ambient temperature determination condition, and casing temperature determination condition. If at least one of the temperature control trigger condition is met, a temperature anomaly is determined, the temperature control module is triggered, and the following steps are executed: The temperature anomaly type is determined based on the real-time temperature dataset, and the corresponding temperature control execution response is matched according to the temperature anomaly type.

7. The emergency power failure kit for a sluice gate according to claim 1, characterized in that, The power-braking coordinated control unit uses the built-in feedback resistor module in the electronic controller package as the core braking actuation component, adapting to the start-stop control and starting current and running current performance requirements of the winch-type gate hoist. The coordinated steps are as follows: Receive real-time operating condition data, including: power battery pack discharge current. Output voltage of the power conversion unit , speed of winch and gate hoist motor and gate position signal ; Based on the real-time operating data, it is determined whether the feedback resistor module needs to be triggered. The feedback resistor module is equipped with an adjustable resistor. If necessary, the optimal connection resistance value of the adjustable resistor is calculated based on the real-time operating data. The calculation formula is as follows: In the formula, for Adaptive coefficients, This is the back electromotive force of the motor. Rated operating current; Based on optimal access resistance value A tiered switching circuit is used to achieve smooth connection of the adjustable resistor.

8. The emergency power failure kit for a sluice gate according to claim 7, characterized in that, The switching process of the hierarchical switching circuit is as follows: Set the basic time unit and connect in the first phase. And for 0.5 to 1 basic time unit, the current buffering during the initial braking phase is achieved by multiplying the resistance value; After entering the second phase, switch access. And for 1-2 basic time units, the resistance value is gradually reduced to enhance braking efficiency; at the same time, the speed of the winch hoist motor is monitored in real time. The rate of change is used to determine whether the braking trend meets expectations; Entering the third phase, access Continuing until gate position signal Upon reaching the threshold, real-time monitoring is conducted during this period. ;like Then switch access. Implement flow limiting protection until Switch back .

9. The emergency power failure kit for a sluice gate according to claim 1, characterized in that, The electronic controller includes a one-button mechanical gate switch, which adopts a mechanical lever-type bidirectional operating structure. When the switch is lifted upwards, a gate opening command is triggered, which synchronously drives the winch to rotate. The winch rotates either forward or backward. When the switch is pressed down, the gate is closed, and the winch stops rotating.

10. A sluice gate power failure emergency kit is applied to a winch, wherein the winch is driven by the sluice gate; characterized in that, The emergency power failure kit for the sluice gate is as described in any one of claims 1 to 5 and 7 to 9; The power source interface of the winch is compatible with the output interface of the electronic controller package, and the mechanical and electrical dual compatibility connection is achieved through standardized connection ports and switchable exchange connectors. The exchange connector has a built-in forward and reverse control switching module. Through the polarity reversal structure of the connector terminals, in conjunction with the direction control signal inside the electronic controller package, it can quickly switch between forward lifting control and reverse lowering control of the winch. The standardized connector is equipped with a positioning pin to prevent misinsertion and an interface locking device.

11. A method for using a sluice gate power failure emergency kit according to any one of claims 1 to 5, 7 to 9, characterized in that, Includes the following steps: The number of power battery packs I is determined based on the rated power of the winch and the duration of emergency operation. If it is ≥2, multiple power battery packs are connected in series / parallel and interconnected with signals through battery connection cables with color markings and anti-misinsertion structures. A battery connector cable group with first and second color markings is used to detachably connect the positive / negative terminals of the power battery pack to the corresponding terminals of the electronic controller pack. The different shapes of the terminals are designed to avoid mis-insertion. Connect the output interface of the electronic controller package to the power source interface of the winch through the standardized connector and the switchable exchange connector: through the polarity reversal structure of the exchange connector, in conjunction with the signal of the electronic controller package, set the winch to the forward lifting or reverse lowering mode, tighten the interface locking device and confirm that the anti-misinsertion positioning pin is in place. After the self-test is passed, the one-button mechanical gate switch is raised to start the gate operation. The battery management subunit is used to realize real-time monitoring of the power battery pack, and the power-braking coordination control unit is used to realize logic control. When a stop is required, press the switch down, or the control unit will automatically perform graded braking and current limiting protection.

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