59 results about "System protection" patented technology

This invention discloses a protection and control method and system for a high-pressure feedwater pump system during the start-up and shutdown process of a gas turbine unit, belonging to the field of intelligent control of gas turbine units. It includes a first subtraction module, a first less than comparison module, a second less than comparison module, a third less than comparison module, a first quality judgment module, a second quality judgment module, a first NOT module, a second NOT module, a third NOT module, a first AND module, a second AND module, a third AND module, a fourth AND module, a first delay module, a second delay module, a third delay module, and a first OR module. The main functions of this invention include: achieving adaptive protection throughout the start-up and shutdown process, multi-system collaborative control, improving the safety and reliability of pump unit operation, reducing the intensity of manual intervention, and adapting to the operational needs of frequent start-up and shutdown and rapid load changes of the unit.

A solid-state power controller, by setting up a power supply voltage acquisition module, a load voltage acquisition module, and a current detection module, and in conjunction with the analysis and judgment function of a signal processing module, can quickly output control commands when abnormal states such as overvoltage, overcurrent, or short circuit occur in the power supply and load. This drives the control switch module to cut off the output circuit in a timely manner, improving the system's protection capability and safety. Fault information from the power supply voltage acquisition module, load voltage acquisition module, and current detection module is simultaneously uploaded to the host computer, enabling rapid identification of the fault source.

This invention relates to the field of industrial internet security technology, and discloses a method and system for evaluating industrial internet data security protection capabilities. The method includes acquiring network traffic logs and system response records; performing time-series correlation analysis and sequence causal relationship completion based on the logs and records to obtain a dynamic evolution sequence of attack behavior; constructing an attack path graph model and parsing the correlation structure based on the sequence to obtain an attack path correlation structure; identifying high-latency paths and calculating response time differences to obtain a set of high-latency paths; extracting time feature vectors and quantifying the similarity of protection effectiveness from this set to obtain a quantitative score for path protection effectiveness; combining the score and difference index to perform a comprehensive risk assessment of physical topology mapping and node cascade failure analysis to obtain the system's comprehensive protection weaknesses; and performing adaptive scenario reconstruction closed-loop verification based on the weaknesses. This method can achieve accurate evaluation and dynamic verification of system protection weaknesses in complex adversarial scenarios.

The signal dynamic gain control system provided by this invention constructs an adaptive gain adjustment path through a first operational amplifier circuit and a feedback control circuit. This allows for real-time adjustment of the pre-amplification factor based on the signal strength at the front end of the analog-to-digital converter, avoiding signal overload caused by fixed gain and improving the system's adaptability to dynamic audio input. Furthermore, a comparison circuit composed of a voltage comparator and a programmable reference voltage source enables real-time judgment of high and low level logic signals, facilitating the construction of a control feedback link with a response time in the microsecond range and enhancing the system's protection sensitivity.

PROTECTION SYSTEM WITH A CALIBRATED CLAMPING SYSTEM The invention comprises a rail (100) including a shaft (102) carrying a first shoe (104) and having a passage (106), a slide (108) with a first end mounted to slide within the shaft (102) through the passage (106) and a second end (108a) having a bore (110), a locking means (112) for the slide (108) relative to the shaft (102), a threaded rod (114) inserted into the bore (110) and carrying a second shoe (116), and a nut (118) screwed onto the threaded rod (114), wherein the rail (100) further includes a spring (150) fitted around the threaded rod (114) between the nut (118) and the slide (108), and a secondary shaft (152) arranged around the spring (150) between the nut (118) and the slide. Fig. 1

The application relates to the technical field of power system protection equipment, and discloses a circuit breaker which comprises a base and a cover body, the base comprises a bottom plate and two fixed plates, the bottom plate and the two fixed plates enclose a containing groove, the cover body is provided with first fixed blocks aligned with the fixed plates, and the base is provided with a first isolation structure; the first isolation structure comprises a plurality of first isolation strips arranged at one end of the bottom plate facing the fixed plates, a first insulating baffle arranged at the upper end of the fixed plate, and a first isolation block arranged at the upper end of the cover body, the upper end of the first isolation strip is provided with a first insulating baffle, a multi-pole main loop structure is arranged in the containing groove, and the multi-pole main loop structure is located between the first isolation strip and the adjacent first isolation strip / fixed plate; the multi-pole main loop structure comprises a shell, a first conductive terminal is arranged in the shell, the first conductive terminal extends upwards out of the shell and is located between the first isolation strip and the adjacent first isolation strip / fixed plate. The application has the advantages of reducing the failure probability of flashover and short circuit.

A kind of pipeline's sacrificial anode boost power cathodic protection system, in order to solve the problem that pipeline protection distance is shorter when pipeline without external power supply is often used in sacrificial anode protection, cannot realize synchronous power-off test and cathodic protection and corrosion parameter remote monitoring, detection and other automation management, the technical scheme adopted is: using DC / DC boost module to increase the voltage between sacrificial anode and grounding body as power supply, to improve the protection potential of pipeline and realize each automation management function.Pipeline protected by sacrificial anode boost power cathodic protection system can be adjusted to the upper limit of protection potential to increase the length of cathodic protection of pipeline under the premise of meeting cathodic protection criteria, and realize the automation management functions such as synchronous on-off test, cathodic protection and corrosion parameter remote monitoring, detection of pipeline without external power supply cathodic protection with low cost. Figure 1 is the abstract drawing of the present application.

The method and system for identifying new energy power supply under asymmetric fault based on sequence impedance difference, the protection device collects three-phase current and three-phase voltage in real time, and calculates to obtain negative sequence current voltage, zero sequence current voltage and positive sequence current voltage; after the protection is started, the asymmetric fault type is judged; when the ground fault occurs, the modulus difference and impedance angle difference of the negative sequence impedance and the zero sequence impedance are compared to judge the fault characteristics of the power supply behind the protection; when the phase-to-phase fault occurs, the modulus difference of the negative sequence impedance and the positive sequence impedance is compared, and the impedance angle difference of the negative sequence impedance and the positive sequence impedance and the difference between the line positive sequence sensitive angle are combined to judge the fault characteristics of the power supply behind the protection; it is determined that the power supply behind the protection is a new energy power supply, the identification of the new energy power supply under asymmetric fault based on sequence impedance difference is realized, and the safety and reliability of the relay protection under the new energy access to the power system are improved.

The utility model relates to industrial automation equipment vision system protection technical field, concretely relates to a kind of high protection degree industrial camera protection device.The device includes drive unit and protection unit, protection unit is used to cover industrial camera imaging face when protecting state;Drive unit includes drive box, pneumatic mechanism and linear variable rotary motion mechanism are provided in drive box, linear variable rotary motion mechanism includes linear motion piece and rotary motion piece, pneumatic mechanism drives linear motion piece linear motion, linear motion piece drives rotary motion piece rotation, rotary motion piece protection unit is rigidly connected by connecting piece, rotary motion piece swings the protection unit by connecting piece, to open and close industrial camera imaging face.Pneumatic mechanism cooperates linear variable rotary motion mechanism, drives protection unit swing, without complex connecting rod structure, protection unit overturning can be realized, automation drives protection unit cover industrial camera imaging face, without manual opening and closing, ensure operation efficiency.

This invention discloses a vehicle-mounted mobile drone swarm charging power supply protection system, belonging to the field of drone charging technology. Addressing the problems of existing vehicle-mounted charging systems, such as single protection mechanisms, poor adaptability to vehicle scenarios, and lagging protection, the system includes a vehicle-mounted support unit, an energy storage power supply unit, a drone swarm charging interface unit, a multi-channel hierarchical power adjustment unit, a multi-dimensional status sensing unit, a core protection control unit, a vehicle environment adaptation protection unit, and a wireless interaction unit. This invention constructs a two-level hierarchical collaborative protection architecture of total power and individual channels, combined with a dynamic power allocation algorithm to achieve overload and overcurrent protection for swarm charging. It designs a contact fault prediction algorithm based on dynamic impedance matching and vibration characteristic correlation, adapting to active protection in vehicle bumpy scenarios. Simultaneously, it achieves linkage protection between the vehicle main power supply and the charging power supply, as well as environmental adaptive threshold correction.

A liquid cooling system such as a liquid cooling distribution unit includes a liquid circuit for recirculating a cooling liquid, one or more liquid pumps, one or more liquid filters, pressure sensors, and a controller for determining differential pressures across the one or more liquid filters. In embodiments, the controller implements a filter health monitoring scheme for predicting the time for filter replacement, and in some embodiments, implements a low pump speed operating mode for system protection.

This invention discloses a method, device, electronic equipment, and storage medium for active power control of energy storage converters, belonging to the field of energy storage converter control technology. The method includes: acquiring the total regulation command, target regulation direction, and real-time active power and state of charge of each energy storage converter; determining the maximum regulation power of each energy storage converter according to operating constraint parameters and accumulating them in a preset order; determining the preceding energy storage converter, the last energy storage converter, and the remaining energy storage converters accordingly; allocating regulation power separately and generating a target power command; and controlling the output active power of each energy storage converter according to the target power command. Therefore, by implementing this invention, the problems existing in the prior art, such as the easy triggering of the underlying system protection limit when multiple sets of energy storage converters perform power coordinated regulation, and the insufficient matching accuracy between the actual output power of the entire station and the dispatch command due to the residual of the end allocation, can be solved.

Method and systems for determining a battery electric vehicle (BEV) protection plate has been damaged. A BEV protection plate includes a circuit. The circuit includes a plurality of conductive tabs. The BEV protection is separated from a battery housing by an opening. The conductive tabs extend from the circuit disposed on the BEV protection plate into the opening. A diagnostic device measures a voltage of the battery housing. A controller is in communication with the diagnostic device, determines a short circuit based on the measured voltage of the battery housing; and outputs to a display a notification that the BEV protection plate is compromised.

Systems and methods are provided for landing of an aerial vehicle on a runway. The systems include a runway overrun awareness and alerting system (ROAAS) configured to: monitor flight parameters during an approach phase and landing phase of a flight, and determine a landing distance value based on the flight parameters, an automatic flight control system (AFCS) including an automatic flight runway overrun awareness and alerting system (AF-ROAAS) protection mode configured to adjust energy of the aerial vehicle during the approach phase and / or the landing phase to reduce a likelihood of the aerial vehicle overrunning the runway, and a controller configured to: compare the landing distance value and an available runway length value to a threshold criterion, wherein the threshold criterion corresponds to the likelihood of the vehicle overrunning the runway, and automatically activating the AF-ROAAS protection mode in response to a determination that the threshold criterion is met.

This invention belongs to the field of power electronics and DC power system protection technology, specifically relating to a boost converter topology and control method. The structure includes: a power supply and a boost inductor L. boost Main switch tube Q 1. Converter circuit breaker Q conv capacitor circuit breaker Q cap The components include a first resistor R1, a second resistor R2, a load resistor R3, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first diode Dsnub1, a second diode Dsnub2, a varistor MOV, and a line inductor Lline. This invention can replace traditional DC circuit breakers, improving system operating efficiency and protection performance. It can interrupt the discharge current of the DC bus capacitor in microseconds and safely release the inductor's stored energy in milliseconds, avoiding voltage overshoot in semiconductor devices and effectively improving the safety and reliability of the DC power grid.

This invention discloses a temperature-sensitive, current-limiting, self-shutting current collector for lithium-ion batteries, addressing the issues of response delay and insufficient safety redundancy inherent in existing BMS (Battery Management System) protection technologies. It comprises a metal current collector, a temperature-sensitive current-limiting layer positioned along the current direction, and an electrode active material layer. The temperature-sensitive current-limiting layer uses a positive temperature coefficient material, exhibiting at least a 102-fold increase in volume resistivity within a narrow temperature range of 90-130°C, and also possessing a high specific heat capacity. Under normal conditions, the temperature-sensitive current-limiting layer exhibits low resistance, allowing for normal charging and discharging of the battery cell. At high temperatures, its resistance increases sharply, limiting or cutting off the current and mitigating heat generation. Upon triggering, this current collector is identified by the existing BMS through internal resistance and current anomalies, forming dual internal and external protection. This requires no modification to the existing system, offers high manufacturability, and significantly improves the safety and reliability of energy storage systems.

This invention discloses a cooling tower circulating water optimization control system and method, relating to the field of cooling tower control technology. The invention includes, in response to a bypass filter start command, controlling a bypass filter pump to start at a first frequency and continue operating for a preset delay. During this preset delay, the water output from the bypass filter pump is directed to the drain pipe. The first frequency is lower than the rated frequency of the bypass filter pump, and the preset delay ensures that the turbid water stirred up in the collection tank due to the bypass filter pump start-up disturbance is discharged. This invention breaks down a single bypass filter operation cycle into four time segments: a disturbance stage, a delay waiting stage, a normal filtration stage, and a backwashing and draining stage. During the disturbance stage and the delay waiting stage, the water output from the bypass filter pump is directed to the drain pipe instead of the main circulation system. This limits the turbidity peak stirred up by hydraulic disturbance in the early stages of bypass filter start-up to within the bypass filter branch or directly discharged from the system, protecting the heat exchanger tube bundle from particle scouring and deposition contamination by high-turbidity water.

A system and method test sustained and anti-islanding capabilities of EUT, where a power island is sustained without anti-islanding functionality and becomes de-energized with anti-islanding functionality. The method includes applying grid voltage to the EUT to obtain measurement current from the EUT; calculating RLC component values of a programmable RLC filter from measurement current and source voltage, including calculating target gain and phase, calculating target R, L and C parameters using the target gain and phase, and translating the target R, L and C parameters to physical parameters; applying the physical parameters and the measurement current to the programmable RLC filter to obtain RLC voltage; comparing the RLC voltage to source voltage; and when the RLC voltage is substantially the same as the source voltage, predicting that transition to a power island with the applied RLC component values will be sufficiently smooth to avoid triggering system protections of the EUT.

This invention discloses a rod-type spring buffer mechanism for a radial forging chuck, comprising an inner sleeve, a worm gear, a worm, and several circumferentially distributed spring rods. One end of each spring rod is fixed to the tailstock, and the other end is connected to the worm gear. This mechanism places the buffer point between the worm gear and the inner sleeve, utilizing the bending deformation of the spring rods to absorb forging impact energy. This invention offers advantages such as strong high-frequency adaptability, good transmission system protection, and adjustable buffering force. Furthermore, this invention discloses two optimized embodiments: a spring rod structure with fixed supports at both ends and a layered buffer structure with added compression spring groups; a switching mechanism that allows switching between the two buffering methods; and a continuously variable speed control system for adapting to high-frequency impacts, further improving the performance and reliability of the mechanism.

The application provides a flow sand area photovoltaic power plant wind-sand prevention system and application thereof. The system comprises a filling type surrounding net sand prevention barrier and a filling type surrounding net sand fixation barrier arranged at the periphery of the photovoltaic power plant, and a through vehicle type sand prevention barrier and a through vehicle type sand fixation barrier arranged in an inter-board corridor at the inner edge of the photovoltaic power plant. The filling type surrounding net sand prevention barrier and the filling type surrounding net sand fixation barrier are used to prevent and fix sand, and most of the sand sources in the windward direction are intercepted and fixed outside the field area. The through vehicle type sand prevention barrier and the through vehicle type sand fixation barrier are used to prevent and fix sand in the inner edge zone of the photovoltaic panel array area, so that a small amount of flowing sand passing through the peripheral protection measures is fixed. The system protection concept is adopted, and the system protection of the body+periphery is formed. The peripheral sand sources are cut off, the wind-sand problem of the whole photovoltaic field area in the flowing sand area is effectively solved, and the convenience of maintenance is considered. No additional operation and maintenance channel needs to be reserved.

The application discloses a ring main unit current transformer secondary circuit disconnection detection method and system, and relates to the field of power distribution network system protection automation. The method comprises the following steps: obtaining a power balance imbalance starting threshold value according to a power sum, judging whether a bus is power imbalanced according to the power balance imbalance starting threshold value, obtaining three-phase currents of incoming lines and outgoing lines of the bus when the bus is power imbalanced, calculating current imbalance degrees of the incoming lines and the outgoing lines of the bus according to the three-phase currents, judging whether a current transformer secondary circuit is abnormal according to the current imbalance degrees, calculating phase sudden change currents according to the obtained three-phase currents of the incoming lines and the outgoing lines of the bus at the same moment when the current transformer secondary circuit is abnormal, judging whether the phase sudden change currents satisfy a third preset condition, and if yes, the current transformer secondary circuit is disconnected. According to the power node power conservation principle, the line current transformer secondary circuit disconnection discrimination accuracy and rapidity are improved under the condition that bus voltages are normal.

This invention relates to a liquid cooling unit, a self-contained liquid cooling unit, and a method for monitoring the health of one or more filters in a liquid cooling application. The liquid cooling system, such as a liquid cooling distribution unit, includes a liquid loop for recirculating the coolant, one or more liquid pumps, one or more liquid filters, a pressure sensor, and a controller for determining the pressure differential across one or more liquid filters. In embodiments, the controller implements a filter health monitoring scheme for predicting filter replacement time, and in some embodiments, implements a low pump speed operation mode for system protection.

This invention discloses a coordinated control method for a sending-end bipolar converter in a wind power integrated into a flexible DC system, relating to the field of power system protection and control. The method includes the following steps: Step S1, setting the active power-frequency rise characteristic curve equations for the sending-end positive and negative converters; Step S2, setting the reactive power-voltage droop characteristic curve equations for the sending-end positive and negative converters; Step S3, setting the active power-frequency rise characteristic curves for the positive and negative converters under special operating conditions with limited capacity; Step S4, the active power balance and voltage stabilization adjustment process of the sending-end positive and negative converters during wind power output power fluctuations; Step S5, the frequency coordination process of the bipolar converters. This invention, employing the above-mentioned coordinated control method for a sending-end bipolar converter in a wind power integrated into a flexible DC system, can ensure the balance of active power between the positive and negative DC networks and the voltage and frequency stability of the AC bus voltage when there are control value data deviations in the control system.

This application relates to the field of motor drive system technology, and discloses a motor drive system, protection method, device, and computer-readable storage medium. The system includes: a diode array protection circuit, a full-bridge circuit of a motor controller, a processor, a memory, a communication interface, and a communication bus. The input terminal of the diode array protection circuit is connected to the positive terminal of the DC bus of the full-bridge circuit of the motor controller, and the output terminal of the diode array protection circuit is connected to the negative terminal of the DC bus of the full-bridge circuit of the motor controller. The processor, memory, and communication interface communicate with each other through the communication bus. The processor is communicatively connected to the diode array protection circuit, which is used to conduct according to the processor's instructions to discharge the energy generated by the motor. Applying the technical solution of this application can effectively discharge excess energy generated by the motor, improving system safety and reliability.

The application discloses an AC-DC power grid intelligent scheduling and protection control method, system, device and medium, and belongs to the technical field of intelligent power grid operation control, which comprises the following steps: constructing an AC-DC collaborative scheduling model, dynamically predicting new energy output and load demand and generating a coordination instruction; based on the scheduling result, establishing a multi-level linkage protection architecture, defining AC and DC system protection collaborative logic; integrating heterogeneous operation data of AC and DC systems to construct a unified analysis model; adopting a deep reinforcement learning algorithm to rollingly optimize a dynamic power flow distribution strategy; dynamically correcting protection parameters and triggering edge side fault rapid response according to real-time operation state; forming a closed-loop technology link, with previous results driving subsequent actions, so that the adaptive collaboration of scheduling, protection and control is realized. Through the AC-DC collaborative scheduling and multi-level protection architecture, combined with the deep reinforcement learning algorithm and the dynamic protection mechanism, the application constructs a "scheduling-protection-control" three-dimensional decision system, and improves the stability of the power grid.

The application discloses a kind of based on cross-scale holographic field's digital twin construction and regulation system and method, belong to digital twin and complex system modeling technical field.The system includes: cross-scale data acquisition layer, for from target physical system acquisition covers microscale, mesoscale and macro scale multilevel operating state data;Holographic field construction layer is connected with the cross-scale data acquisition layer, for multilevel data is mapped into a continuous holographic field, and the information fidelity and coupling deviation between each scale level are calculated by the single composite operation consisting of exponential operation, logarithmic operation and difference operation;Field diagnosis and regulation layer is connected with the holographic field construction layer, for real-time monitoring the coupling deviation value of holographic field, when deviation exceeds preset threshold, generating regulation instruction, driving digital twin model to carry out parameter calibration and structure correction;Closed loop verification layer is connected with the field diagnosis and regulation layer, for verifying the state consistency of digital twin model after regulation and actual physical system, and feedback verification result forms closed loop iteration.The application realizes the full-scale unified digital twin modeling and closed loop regulation from microcosmic to macroscopic for the first time, is suitable for earth system science, industrial equipment operation and maintenance, city infrastructure management, ecological system protection and the digital twin construction and intelligent regulation of various cross-scale complex systems.

This utility model relates to a production status display system device for explosion-proof areas, comprising a display control panel and a display system housing. A display control panel is installed inside the display control panel, and a display screen is mounted on the front of the display system housing. A protective device is provided on the display control panel for display system protection, and a heat dissipation structure is provided inside the display system housing located behind the display control panel. By setting up the protective structure, the control device is less susceptible to external dust and other contaminants when not in use, ensuring the accuracy of the display system device. The heat dissipation structure provides the display system housing with excellent heat dissipation capabilities, reducing the likelihood of errors or damage after prolonged operation. This high level of safety performance meets the production requirements of explosion-proof areas.

This application relates to the field of power system protection technology, specifically to a power system fault self-healing method, device, and system based on the Internet of Things (IoT). The method includes: calculating the difference between the subgrid net load and the active power of the energy storage station to quantify the degree of supply-demand matching; calculating the correlation coefficient between subgrid voltage fluctuations and active power fluctuations of power resources to determine the degree of voltage coordination; calculating the cross-correlation between subgrid voltage deviations and reactive power of power resources to determine the reactive power regulation coefficient; and weighted fusion to obtain a closeness score; constructing an association weight by combining the closeness score and the electrical distance between the subgrid and the power resources; and solving the scheduling priority based on the association weight to control the energy storage station to supply power to the subgrid to achieve fault self-healing. This application solves the problem of poor recovery effect caused by the lack of global coordination in local self-healing decisions, improving the efficiency of power system fault recovery and the stability of power system operation.