378results about "Parameter calibration/setting" patented technology

The invention discloses a big data-based power distribution network protection setting decision system and method, and relates to the technical field of power distribution network protection, and the system comprises a multi-source data collection module which collects the operation data of a power distribution network; the big data feature processing module is used for carrying out feature extraction and constructing a multi-dimensional feature vector library containing time sequence features and frequency domain features; the protection setting model module is used for constructing a protection setting decision model based on a deep learning framework and carrying out supervised learning training by utilizing historical fault data and a setting scheme; the multi-scene simulation verification module is used for constructing a power distribution network digital simulation model; and the scheme evaluation optimization module is used for establishing an evaluation index system and outputting an optimal protection setting scheme. According to the method, deep learning and historical data are combined, an optimal protection setting scheme is automatically generated, faults are recognized through wavelet transform and Fourier transform, protection parameters are adjusted in real time, mistaken and leaked protection is reduced, timeliness is improved through edge calculation, the strategy is optimized, and the safety of the power distribution network is enhanced.

The invention discloses an electrical equipment overload protection method and system based on multistage load monitoring, and relates to the technical field of electrical equipment overload protection, and the method comprises the steps: setting an equipment-level monitoring node, a line-level monitoring node and a system-level monitoring node, and obtaining a three-level load data set; constructing a load characteristic matrix; setting an initial overload threshold conforming to the industrial standard of the switch equipment; a correction coefficient is configured, and the initial overload threshold value is synchronously corrected; drawing up a grading threshold comparison table; meanwhile, a load dynamic constraint mechanism and an equipment health intervention mechanism are set, and electrical equipment overload protection parameter setting is carried out. The technical problems that in the prior art, the overload protection threshold value of the electrical equipment is fixed, dynamic adjustment is lacked, and the adaptability to the health state and load change of the equipment is insufficient, so that protection pertinence and effectiveness are low are solved, accurate overload protection of the electrical equipment is achieved, and the safety of the electrical equipment is improved. And the technical effects of pertinence and effectiveness of overload protection are improved.

The invention discloses a reclosing locking method and system based on winding hot-spot temperature fitting, and relates to the technical field of power transformer dynamic stability assessment, and the method comprises the steps: determining a target transformer, collecting parameters, building a winding current calculation model, calculating steady-state and short-circuit current waveforms, and carrying out the winding temperature rise test of the transformer, the method comprises the following steps: measuring a steady-state temperature rise value, constructing and correcting an electromagnetic heat flow coupling model, generating steady-state and transient-state temperature field data of a winding, constructing a target function of a winding hot-spot temperature, fitting simulation data by utilizing an optimization algorithm, obtaining a fitting function, calculating a winding stress value under a short-circuit working condition in real time, and comparing the winding stress value with a dynamically adjusted stress limit value, so as to obtain a winding stress value. Alarm and locking reclosing are triggered according to the result, and intelligent protection of the transformer is achieved. According to the invention, through accurate parameter acquisition, model establishment, temperature field simulation, hot-spot temperature fitting and stress calculation, real-time monitoring and intelligent protection of the transformer winding under the short-circuit working condition are realized.

The invention discloses a power distribution network 30-degree phase angle difference non-perception loop closing dynamic protection constant value cooperation method, and relates to the technical field of power grid automation, and the method comprises the following steps: extracting a protection equipment connection relation based on a power distribution network topology structure, and constructing a topology model containing a hierarchical membership relation; according to the real-time measurement data, generating an interval load distribution model by adopting a periodic entropy weight correction removing algorithm; simulating a load transfer process under a 30-degree phase angle difference based on the topology model and the interval load distribution model, and outputting current change time sequence data of the transfer path protection equipment; according to the hierarchical membership relationship and the current change time sequence data, calculating and checking a protection constant value, and dynamically adjusting the protection constant value by using an impact tolerance coefficient to generate a final protection constant value; and issuing the final protection constant value to the protection equipment, and triggering load transfer operation.

The invention discloses an adaptive direct-current partition protection method based on a reconfigurable topology perception fault tree and an improved LSTM (Long Short Term Memory), which is suitable for fault diagnosis and partition protection of a direct-current system of a transformer substation. According to the algorithm, improved dynamic fault tree analysis and a long short-term memory (LSTM) network model are combined, and rapid positioning and selective isolation protection of direct-current system faults are achieved. The method comprises the following steps: firstly, constructing an updatable dynamic fault tree model based on fault historical data, and correcting a fault event weight in real time by adopting a Bayesian method to realize dynamic reconstruction of a fault propagation path; secondly, a multi-target particle swarm optimization algorithm is introduced, optimization is carried out between the minimum protection response time and the minimum isolation range, and an optimal partition scheme is generated; multi-dimensional time sequence characteristics such as fault current and bus voltage are extracted through a multi-channel LSTM model, and the fault development trend is predicted; and finally, dynamically adjusting a trigger threshold and a delay parameter of a protection action in combination with an online reinforcement learning strategy network of an Actor-Critic architecture. The method has the advantages of quick fault response, flexible partition, adaptive protection strategy and the like, and the safety and the stability of the direct current system can be remarkably improved.

The invention relates to the field of display, and discloses a short-circuit protection circuit, an array substrate, a display device and a short-circuit protection method.The short-circuit protection circuit is used for an OLED device and comprises the steps that an information sensing module obtains the actual working current of the OLED device and real-time parameters related to the working state of the OLED device; the dynamic expectation calculation module calculates the dynamic expectation working current n of the OLED device according to the real-time parameters and a preset OLED electrical characteristic model; the decision module synthesizes the actual current, the expected current and the current change rate / fluctuation amplitude to generate a risk judgment signal; and the response control module executes protection operation according to the judgment signal. According to the OLED short-circuit protection method, the accuracy, the sensitivity and the intelligent management level of OLED short-circuit protection are remarkably improved through the technology of dynamically calculating the expected current and carrying out decision making and parameter self-adaptive adjustment by fusing the actual current time sequence characteristics.

The invention provides a power distribution network relay protection fixed value setting method and device. The method comprises the following steps: constructing a primary equipment topology connection relation of a power distribution network outgoing line unit; identifying the distributed new energy equipment in the outgoing line unit; searching a path from the distributed new energy equipment to an equivalent bus according to the topological connection relation; recording a primary equipment set in the path; integrating the primary equipment set and the equivalent bus to form global topological connection; calculating the short-circuit current of the power distribution network based on the global topological connection; and setting a fixed value of the relay protection device according to the short-circuit current. According to the invention, by constructing the multi-outlet-unit collaborative topology and identifying the new energy path, the calculation model is simplified, the new energy influence of the same bus is considered, and the short-circuit current calculation precision is improved, so that the efficient and accurate setting of the relay protection setting value is realized, and the stable operation of the power grid is ensured.

A self-triggering, bidirectional control electronics component for an electronic switch (50), for the detection and rapid shutdown of currents at a selected threshold value for both current flow directions, includes a threshold switch having a plurality of selectable shutdown threshold values for both current flow directions, the threshold switch coupled to a bidirectional current sensor system (65), arranged in the electronic switch, based on sensing of sensors on an input side of the threshold switch; and a high-speed de-energizing circuit (53) on an output side of the threshold switch including a high non-load circuit voltage for rapid removal of current from a magnetic drive coil (45), the high-speed de-energizing circuit being configured to rapidly remove the current from the magnetic drive coil when the bidirectional current sensor system senses a current greater than or equal to the selected threshold value among the plurality of selectable shutdown threshold values.

The invention provides a control method and device for an intelligent self-adaptive voltage protector, and relates to the technical field of voltage protector control, and the method comprises the steps: collecting the input voltage data of a target voltage protector, and obtaining a voltage time-varying behavior set; constructing a voltage dynamic tolerance threshold domain according to the voltage time-varying behavior set of the target voltage protector and the operating parameters of the target voltage protector, and determining a voltage tolerance confidence interval of the target voltage protector through the voltage dynamic threshold domain; according to the voltage tolerance confidence interval, obtaining an electric quality excursion index of the target voltage protector, performing risk prediction on the target voltage protector according to the electric quality excursion index to obtain a voltage risk label, and determining a regulation and control response strategy according to the voltage risk label and a preset risk response; and performing intelligent regulation and control on the target voltage protector through the protection response strategy. According to the invention, the protection range can be adaptively adjusted according to the operation condition and the voltage dynamic characteristics, and the accuracy and reliability of voltage protection are effectively improved.

The invention relates to the technical field of power distribution networks, and discloses a deep learning-based protection setting value setting method for a power distribution network containing a distributed power supply, and the method comprises the following steps: obtaining real-time operation data of the power distribution network, and constructing a dynamic graph representation of the power distribution network according to the real-time operation data; processing the dynamic graph representation by using a graph attention network model, and extracting deep features representing the topological structure and node dynamic information of the power distribution network; according to the method, intelligent perception and rapid diagnosis of faults in a distributed power supply environment, dynamic optimization of protection constant values and serialization decision of subsequent control measures are unified in one framework, information sharing and action cooperation are achieved, and fault diagnosis and constant value calculation are processed in parallel in combination with multi-task learning. The adaptive capacity and decision accuracy of complex operation scenes such as high permeability and variable topological structures of the distributed power supply are improved, and an effective guarantee is provided for safe and stable operation of the distributed power supply after the distributed power supply is connected to the power distribution network.

The invention discloses a protection setting calculation and optimization method based on an intelligent power plant management platform, and relates to the technical field of power system protection. By constructing a platform and equipment communication link, integrally collecting and preprocessing internal and external parameters, and dynamically updating topology and model parameters in combination with a switch state, the problem that a traditional static model is difficult to adapt to operation changes is solved, the timeliness and accuracy of the model are improved, a multi-scene database is constructed in a classified mode, labels are labeled, and the efficiency is improved. Fault current distribution is accurately calculated, constant value adaptability verification is carried out, constant value optimization is carried out in combination with a multi-objective optimization algorithm and sensitivity analysis, limitation of single-scene constant values is avoided, constant value conflicts under different scenes are reduced, reliability of initial constant values is guaranteed, sensitivity analysis is superposed, it is ensured that the constant values are still reliable during parameter fluctuation, and the reliability of the constant values is improved. The risk of protection operation refusal and misoperation is reduced, a constant value is issued, the device state is monitored in real time, evaluation indexes are calculated, the constant value is controllable in the whole process, and stable operation of the device is guaranteed.

The invention is applicable to the technical field of electrical systems, and provides a new energy access-oriented real-time power grid dynamic constant value checking method, which comprises the following steps of: constructing a full model by acquiring multi-aspect data of a power grid, generating various research state operation modes, and calculating setting parameters by adopting an iterative algorithm considering a new energy short-circuit characteristic, so that the real-time dynamic constant value checking of the power grid is realized. The sensitivity and selectivity of the protection setting value can be accurately checked in real time. Compared with an existing static checking mode, the implementation mode of the invention can adapt to dynamic changes of a power grid operation mode after new energy access, timely discover potential problems of a protection constant value in a new energy environment, generate early warning information and a constant value recommendation interval, effectively avoid failure of the protection constant value, improve reliability and safety of a power grid protection system, and improve the safety of the power grid protection system. Stable operation of the power grid under the condition of new energy high-permeability grid connection is guaranteed, the problem that the prior art cannot adapt to new energy dynamic changes, and consequently a protection constant value may fail is solved, and powerful support is provided for safe operation of the power grid.

An electrical wiring device including: a plurality of line terminals comprising a line-side phase terminal and a line-side neutral terminal; a plurality of load terminals comprising a load-side phase terminal and a load-side neutral terminal; a line conductor electrically coupling the line-side phase terminal to the load-side phase terminal; a neutral conductor electrically coupling the line-side neutral terminal to the load-side neutral terminal; and a controller configured to trigger a trip mechanism to electrically decouple the at least one of the plurality of line terminals from at least one of the plurality of load terminals based, at least in part, on comparing a magnitude of the current differential to a threshold, wherein the threshold is a function of the frequency of the current differential.

The invention relates to a switch-off unit (1, 1.1, 1.2, 1.3, 1.4, 1.5) for an electric charging device (3, 25, 27) with a switch-off arrangement (5, 5.1, 5.2, 5.3, 5.4, 5.5) having a first controllable power semiconductor component (9, 9.1) and a second controllable power semiconductor component (9, 9.2), and a switch-off control device (7), whereinthe first power semiconductor component (9, 9.1) and the second power semiconductor component (9, 9.2) are arranged antiserially, whereinthe first power semiconductor component (9, 9.1) and the second power semiconductor component (9, 9.2) are configured to conduct a charging current of the charging device (3, 25, 27) in a switched-on state, whereinthe switch-off control device (7) is operatively connected to the first power semiconductor component (9, 9.1) and the second power semiconductor component (9, 9.2) and is configured for their respective control, whereinthe switch-off control device (7) is configured to acquire a value of at least one charging parameter which is characteristic of the charging current, andin dependence on the acquired value, to switch off the first power semiconductor component (9, 9.1) and / or the second power semiconductor component (9, 9.2) and thereby interrupt the charging current.

The invention discloses an AC-DC power grid intelligent scheduling and protection control method, system and device and a medium, and belongs to the technical field of intelligent power grid operation control, and the method comprises the steps: constructing an AC-DC cooperative scheduling model, dynamically predicting new energy output and load demands, and generating a coordination instruction; establishing a multi-stage linkage protection framework based on a scheduling result, and defining alternating current and direct current system protection collaborative logic; integrating the heterogeneous operation data of the AC / DC system to construct a unified analysis model; a dynamic power flow distribution strategy is optimized in a rolling mode through a deep reinforcement learning algorithm; according to the real-time operation state, dynamically correcting protection parameters and triggering edge side fault quick response; and a closed-loop technical link is formed, and a preorder result drives a subsequent action, so that self-adaptive coordination of scheduling, protection and control is realized. According to the invention, through an AC / DC cooperative scheduling and multi-stage protection architecture, in combination with a deep reinforcement learning algorithm and a dynamic protection mechanism, a "scheduling-protection-control" three-dimensional decision-making system is constructed, and the stability of a power grid is improved.

To provide a power supply control device capable of estimating correct wire temperature with respect to a plurality of kinds of loads whose current values for driving are different, a power supply control method, and a computer program.SOLUTION: A power supply control device for vehicles, designed to control power supply to a load based on the temperature estimation result of wires connected to the load, includes a change part for changing a parameter of temperature estimation according to the load and an estimation part for performing the temperature estimation by using the changed parameter.SELECTED DRAWING: Figure 4

Provided are an adaptive reclosing method and apparatus for a distribution network, a medium, and a device, which relate to the technical field of automatic control for distribution networks. Firstly, a voltage threshold for reclosing start-up is set based on power of a load and a distributed renewable energy source that are connected in a downstream direction of a circuit breaker of a distribution network before the distribution network fails. Then, after a fault occurs in the distribution network, a positive sequence voltage amplitude and its change rate are calculated. Finally, disconnection and fault statuses of a distributed renewable energy source network are determined based on the positive sequence voltage amplitude and its change rate, and reclosing is performed based on a preset corresponding delay for different situations.

The invention provides a tripping protection method and device and a storage medium. The protection method comprises the following steps: firstly, based on a first preset time window and a first sampling frequency, continuously sliding to obtain a current value flowing through an electronic release; in each first preset time window, the temperature difference between the terminal temperature of the electronic release and the ambient temperature is measured. And calculating an adjustment coefficient according to the rated current value of the electronic release, the actually measured current value, the temperature difference value and the temperature compensation coefficient. Subsequently, a protection current threshold of the electronic release is adjusted based on the adjustment coefficient to determine a target protection current threshold matching the load of the accessed circuit. By considering the influence of the actual current and the temperature difference on the protection current threshold value, dynamic adjustment is carried out, so that the dynamic matching of the load is realized.

The invention discloses a power distribution network fault early warning and isolation control method fused with current disturbance identification, and relates to the technical field of power systems and intelligent control, and the method comprises the steps: S1, monitoring a current signal of a power distribution network in real time, and carrying out the current disturbance identification, S2, judging a fault type based on a current disturbance identification result, and S3, carrying out the fault early warning and isolation control based on the fault type. S4, according to the dynamically adjusted protection action constant value, executing fault isolation control; the power distribution network fault early warning and isolation control method fusing current disturbance identification realizes rapid linkage of fault early warning and isolation control, is suitable for various power distribution system architectures, and has good engineering application value.

The invention discloses a distribution network relay protection method based on dynamic setting, and relates to the technical field of relay protection, and the method comprises the steps: obtaining an equipment aging risk relation based on a dynamic grid-connected topological structure according to the historical fault information of power equipment; obtaining a transfer risk relationship based on the dynamic grid-connected topological structure according to the historical operation data of the power equipment; constructing a setting optimization objective function based on the minimum setting correction frequency and the minimum influence area; obtaining a grid connection probability and a grid connection topological structure set based on the current load data, the dynamic grid connection relation and the dynamic grid connection topological structure; and obtaining a dynamic setting strategy by setting and optimizing the target function, the equipment aging risk relationship, the transfer risk relationship, the grid-connected probability and the grid-connected topological structure set optimization iteration. The beneficial effects of the invention are that the timeliness and reliability of relay protection are improved.

This invention provides a bimetallic strip circuit disconnection control method and system, relating to the field of circuit protection technology. By acquiring the bimetallic strip deformation signal and calculating the difference, and combining different thresholds and durations for judgment, it distinguishes between instantaneous large fluctuations and continuous small faults, achieving accurate tripping and early warning. It has the advantages of effectively distinguishing between normal instantaneous fluctuations and continuous electrical faults, avoiding false tripping, and providing early warning, thereby improving the accuracy and reliability of circuit protection.

The invention relates to a variable-frequency adaptive protection control method and system based on dynamic vector correction, and belongs to the field of power protection control. The method comprises the following steps: measuring an output instantaneous frequency through three-mode fusion; performing dynamic correction on the rotating coordinate system based on the instantaneous frequency to obtain a correction amplitude; performing three-domain confidence factor correction based on the correction amplitude to obtain a comprehensive confidence coefficient; cooperative compensation is carried out based on the comprehensive confidence coefficient and the instantaneous frequency, and the cooperative compensation comprises protection constant value adaptive compensation and excitation-synchronous cooperative compensation which are respectively used for compensating an over-current protection constant value and excitation voltage; and obtaining an error index, carrying out real-time closed-loop verification based on the error index, and optimizing cooperative compensation. Frequency conversion adaptive protection control is realized by means of dynamic vector correction, three-domain confidence evaluation, excitation-protection cooperative compensation and the like.

The invention provides a coal mine relay protection setting calculation method and system based on topology identification, which are applied to the technical field of relay protection, and overcome the limitation of underground communication and calculation resources by monitoring the topology change of a power grid in real time and intelligently distributing and executing calculation tasks based on the change, and solve the problem that the calculation task is difficult to carry out under the complex environment of an underground coal mine. The method solves the problem of how to efficiently and accurately carry out relay protection setting calculation, and has the advantages of adapting to the complex environment and distributed calculation requirements of an underground coal mine, and improving the timeliness and accuracy of relay protection setting calculation.

A power system is electrically connected to a power grid, and includes a stand having a master station transmitting a proper setting value and an in-vehicle charger cooperative with the power grid and including a slave station that receives the proper setting value from the master station. As a result, even when the in-vehicle charger is connected to a stand having a different proper setting value, it is possible to provide a power station, a station and an in-vehicle charger that can secure the consistency with respect to the proper setting value.

A method for characterizing power quality events in an electrical system includes deriving electrical measurement data for at least one first virtual meter in an electrical system from (a) electrical measurement data from or derived from energy-related signals captured by at least one first IED in the electrical system, and (b) electrical measurement data from or derived from energy-related signals captured by at least one second IED in the electrical system. In embodiments, the at least one first IED is installed at a first metering point in the electrical system, the at least one second IED is installed at a second metering point in the electrical system, and the at least one first virtual meter is derived or located at a third metering point in the electrical system. The derived electrical measurement data may be used to generate or update a dynamic tolerance curve associated with the third metering point.

The invention relates to the technical field of electronic circuit design, and discloses a hardware overcurrent protection design circuit of a motor controller, which comprises a driving signal input module comprising a three-phase independent half-bridge driving chip and a three-phase bridge arm N-channel MOS (Metal Oxide Semiconductor) tube, a current detection module consisting of a three-phase sampling branch, two N-channel MOS tubes connected in series in each phase and a sampling resistor, a sampling signal is amplified by the operational amplifier, the voltage comparison module comprises a first comparator and a second comparator, the logic control module comprises an AND gate and a seventh N-channel MOS tube, and the power supply control module comprises a P-channel MOS tube. According to the hardware overcurrent protection design circuit of the motor controller, the overcurrent protection value of the phase line load current is designed through hardware, and when the actual load reaches the threshold value, the hardware immediately responds to disconnect the power supply of the three-phase independent half-bridge driving chip of the controller, so that continuous output overload is avoided, and the reliability of the motor controller is improved. And overload or overvoltage damage of three-phase power bridge circuit components is caused.

A power distribution management system dynamically manages power from an inverter to ensure uninterrupted supply to critical devices, such as power tools, while selectively controlling power to interruptible devices, such as battery chargers, to maintain total current below a predefined threshold. The system includes a microcontroller, an analog-to-digital converter for precise current measurement, and a powerline communications module for real-time data exchange. Current transformers monitor power to each connected device, enabling the system to identify and disconnect lower-priority loads, such as battery chargers, during high-demand periods, while ensuring essential tools remain powered. The system automatically restores power to disconnected devices when load conditions allow, optimizing efficiency and preventing overloading. This intelligent power management approach is particularly suited for portable or hybrid power systems in industrial and field applications.

This invention provides an arc light unit, comprising a control circuit, a photoelectric conversion circuit, and a potential adjustment circuit. The key feature is the inclusion of a potential comparison circuit. This potential comparison circuit obtains an adjustable potential threshold from the potential adjustment circuit. It also obtains the arc light signal potential from the photoelectric conversion circuit, with each photoelectric conversion circuit corresponding to a potential adjustment circuit. When the arc light signal potential does not meet a comparison condition, the potential comparison circuit sends a suppression signal to the control circuit. When the arc light signal potential meets the comparison condition, the potential comparison circuit sends an arc light signal to the control circuit. The comparison condition is that the arc light signal potential obtained by the potential comparison circuit from the photoelectric conversion circuit is greater than the adjustable potential threshold. The arc light unit provided by this invention sends an arc light signal to the control circuit by determining whether the arc light signal potential meets the comparison condition. This arc light unit can be used to adjust the photosensitivity.

The invention belongs to the technical field of household appliances, and particularly relates to an overcurrent protection circuit and a household appliance. The input end of the resistance network module is connected with the output end of the controller, and the controller is used for adjusting the voltage value output by the resistance network module; the positive input end of the first comparator is connected with the output end of the resistance network module, and the negative input end of the first comparator is connected with the output end of the first comparator; the input end of the over-current protection module is connected with the output end of the first comparator, and the over-current protection module is used for outputting an over-current indication signal according to the sampling current in the detected circuit and the voltage output by the output end of the first comparator. According to the scheme, the current protection threshold value in the overcurrent protection module can be regulated and controlled, and better overcurrent protection operation can be carried out on the load circuit.

The invention discloses a chicken flock optimization-based power distribution network distributed power supply adaptive protection coordination method, system and device, and a storage medium, and relates to the technical field of power system relay protection, and the method comprises the steps: collecting power grid operation data in real time through intelligent electronic equipment of each node, and judging whether the system state is changed or not; if the state is changed or a fault trigger signal is received, carrying out power flow and short circuit calculation to obtain a newest fault current; evaluating action coordination of the main relay and the backup relay, and determining whether to start parameter optimization or not according to a result; if starting, constructing a model, solving by using a chicken flock algorithm, and finally issuing optimization parameters to update a relay protection constant value; according to the invention, online adaptive setting of power distribution network protection is realized, the fault isolation precision and the system stability are improved, and the risk of protection maloperation is reduced.