262 results about "Line current" patented technology

The invention discloses a game reinforcement learning-based reactive power dispatching method for an electric vehicle to participate in a power distribution network, and the method comprises the steps: collecting node voltage, line current, electric vehicle charging and discharging states and topological information, and constructing graph attention embedding; generating an initial reactive power regulation action in the multi-agent game reinforcement learning framework, and shaping and updating a strategy gradient through double rewards; the improved particle swarm is initialized according to the updating strategy gradient, and a self-adaptive inertia coefficient is set; iteratively searching according to the node voltage sensitivity, the line reactive margin and the expected convergence step number to obtain an optimized particle swarm; the particle speed is mapped to a main strategy network through online cooperative training, the inertia coefficient is synchronously adjusted, a cooperative optimization strategy is output, a reactive power dispatching instruction is generated, and the algorithm is updated in a closed-loop mode according to real-time feedback. According to the invention, rapid and cooperative reactive dynamic scheduling of an electric vehicle group is realized, and the voltage stability and the electric energy quality are remarkably improved.

The invention discloses an electricity meter terminal temperature anomaly identification method, system and device and a storage medium, and relates to the technical field of intelligent electricity meter monitoring and anomaly detection.The method comprises the steps that currents of a live line loop and a zero line loop of an intelligent electricity meter are sampled, and the deviation rate of the live line current relative to the zero line current is calculated; estimating the temperature of the terminal of the electric energy meter based on the deviation rate and by using the resistance characteristic metering error change trend of the manganese-copper shunt; and when the terminal temperature estimated value of the electric energy meter exceeds a preset threshold value, determining that the temperature of the live wire terminal is abnormal, and recording an alarm event. The method realizes real-time acquisition of current difference characteristics, provides a reliable data basis for subsequent terminal temperature estimation, realizes a method of indirectly reflecting terminal temperature rise through electrical characteristics, ensures that alarm can be triggered and a complete tracing chain can be formed when temperature abnormity occurs, and improves the accuracy of terminal temperature estimation. Therefore, the controllability of the operation safety of the electric energy meter and the completeness of post analysis are improved.

The invention discloses a DC fault arc identification method and device based on a wavelet transform algorithm, and the method comprises the steps: collecting a DC line current signal through a high-bandwidth current sensor, carrying out the digitalization of a signal conditioning circuit and a high-speed ADC, and sequentially carrying out the preprocessing of the elimination of baseline drift through differential filtering and the suppression of specific frequency interference through adaptive notch; performing 3-8-layer multi-scale decomposition on the pure signal by adopting a Daubechies wavelet basis, preferably selecting high-frequency detail coefficients from the first layer to the third layer, and creatively fusing a multi-scale energy entropy representing energy distribution randomness and a time domain kurtosis representing transient impact to form a composite characteristic quantity; a threshold value (threshold value = mean value + adaptive coefficient * standard deviation) is dynamically generated based on sliding time window historical data, the adaptive coefficient is dynamically adjusted according to the load type, the resistive load is 1.8-2.2, and the inductive / capacitive load is 2.5-3.5; and when the composite characteristic quantity exceeds a threshold value and the sample proportion is greater than or equal to 85% within the duration of 0.5-5ms, a tripping execution mechanism is triggered.

The invention discloses a low-voltage distribution area topology identification method, system and device and a storage medium, and the method comprises the following steps: deploying a synchronous measurement unit in a low-voltage distribution area, and obtaining the outgoing line current phasor and voltage phasor data with a synchronous time scale of a whole network; constructing an incoming line and outgoing line current phasor set, and performing adaptive descending sorting according to amplitudes; determining that the nodes corresponding to the incoming line current phasors and the found nodes corresponding to the one or more outgoing line current phasors are in a father-son relationship, and iterating the process until all sets are empty, thereby completing the identification of the topological relationship of the power distribution side; and according to the equipment number contained in the obtained voltage phasor data, determining a meter box connected with the user electricity meters, and then clustering the user electricity meters connected to the same meter box according to the voltage phase angle to obtain the connection phase sequence of each user electricity meter. The problem of key information missing is solved from a data source, and accurate and efficient identification of topology is realized by fusing physical constraints.

The invention discloses a method for monitoring the insulation state of a stator winding of an injection unit based on neutral point harmonic frequency sweeping. The invention provides an active online monitoring method based on harmonic injection for stator winding insulation of a full-power variable-speed pumped storage unit. A common-mode loop is constructed for a motor stator winding of a network side transformer neutral point ungrounded system through a motor neutral point grounded transformer, and therefore online monitoring of the insulation state of a motor stator is achieved. In order to solve the measurement problem of the full-power variable-speed pumped storage unit under the large-current working condition, a neutral point outgoing line current detection technology is adopted. A machine end large current interference area is avoided, monitoring is carried out on the primary side of the grounding transformer, transmission errors are avoided, and the measurement precision and reliability of insulation monitoring signals are remarkably improved. According to the invention, harmonic injection is carried out by avoiding an inherent common-mode component of a unit, a monitorable leakage current signal is enhanced, and the accuracy of insulation equivalent capacitance calculation is ensured.

The application discloses a kind of method and detection system of calculating elevator balance coefficient, comprising: the three-phase voltage value and two-phase current value of three-phase motor are collected, and the voltage phase angle value under voltage resultant vector and line voltage effective value in two-phase αβ coordinates are calculated based on three-phase voltage value and two-phase current value;Current phase angle value and line current effective value under current resultant vector;Elevator car operating speed and elevator car running distance are calculated based on voltage phase angle value;Power factor is calculated based on voltage phase angle value and current phase angle value;Elevator car passes through the moment of elevator balance position based on elevator car running distance, and elevator balance coefficient is calculated based on the running data when passing through elevator balance position.The application calculates the moment of elevator car passing through elevator balance position by three-phase voltage value and two-phase current value and the running distance of elevator car, and elevator balance coefficient can be quickly and accurately calculated based on the running data when passing through elevator balance position.

The invention discloses an electric power system transient stability rapid response control method and system, and relates to the technical field of electric power systems, and the method comprises the steps: collecting a transient harmonic current signal generated by a power grid fault in real time through a harmonic detection unit connected to a DC bus of an energy storage converter, and calculating the phase offset of the transient harmonic current signal; generating a power control instruction through a pre-configured hardware mapping circuit based on the phase offset; acquiring a current differential signal by using a power grid line current sensor, and identifying a path of transient energy flowing to a key unit based on a power grid topological structure; for the path, dynamically forming a virtual high-impedance wall on the target line; and on a consumption path predefined according to the power grid topological structure, controlling the energy storage converter to operate in a current source mode and configuring a reverse power characteristic so as to absorb the energy flow turned by the virtual high-impedance wall.

The invention discloses a power distribution area line loss regulation and control method and system based on light storage cooperation and multi-time scale optimization. Comprising the following steps: data acquisition: acquiring photovoltaic output, energy storage SOC, node voltage and line current data in real time; prediction calculation: predicting photovoltaic and load, and generating regulation and control boundary conditions; optimization decision making: running day-ahead optimization regulation and control and intra-day multi-time scale regulation and control strategies, and generating a regulation and control instruction; and performing control: realizing rapid power adjustment through an energy storage converter and a photovoltaic inverter. A multi-factor coupling line loss model is established, an improved particle swarm algorithm is designed to solve an optical storage scheduling strategy, and data driving and a physical mechanism model are fused to improve prediction precision. And a second-minute-hour collaborative optimization architecture is further constructed, so that rapid voltage stabilization and energy space-time transfer are realized. The method can effectively reduce the line loss rate of the transformer area, and is suitable for the energy-saving and loss-reducing scene of the power distribution network with high-proportion new energy access.

The invention discloses a transformer substation AC power supply residual current detection method and device, and the method comprises the steps: carrying out the vector synthesis of three-phase current data and zero line current data, forming a current difference sequence, exporting a residual current reference curve, and carrying out the fluctuation analysis of the residual current reference curve, and judging the leakage characteristics. After effective leakage features are formed through harmonic elimination, dominant frequency components are locked through frequency spectrum decomposition; calibrating a leakage type identifier according to the dominant frequency component and forming segmented leakage distribution; a deviation degree is formed by means of segmented leakage distribution and residual current reference curve deviation analysis, a correction deviation value is formed through load fluctuation compensation, and a standard exceeding coefficient is formed according to threshold value comparison to detect abnormal nodes to form hidden danger data; establishing a judgment rule based on the hidden danger data and the leakage type identifier to form a detection evaluation index; and executing path tracking on the detection evaluation indexes to form leakage position information, forming a disposal priority through intensity analysis to generate a residual current detection report, and realizing leakage current classification identification and self-adaptive evaluation.

The invention discloses an active power distribution network flexible resource collaborative planning method based on an improved CS algorithm, and the method comprises the steps: constructing a planning and operation integrated active power distribution network double-layer optimization model, enabling an upper planning layer to take the minimum annual comprehensive economic cost as a target, optimizing the locating and sizing of a distributed power supply and energy storage, and covering the investment cost, the operation and maintenance cost and the power purchase cost; the lower operation layer generates an energy storage charging and discharging strategy and a power flow scheduling scheme based on a typical day scene by taking minimum network loss and maximization of new energy consumption as targets, guarantees node voltage and line current safety margin through probability constraint, and constructs a multi-resource coordinated planning-operation closed-loop model; and adopting an improved cuckoo search algorithm to carry out iterative solution on the bilayer programming model. And improving a cuckoo search algorithm, combining a particle swarm optimization algorithm with the improved cuckoo search algorithm, converting double-layer multiple targets into a fitness function by adopting a linear weighting method, and solving an optimal planning scheme.

The invention discloses a main and distribution collaborative optimization scheduling method and system based on a static safety boundary of a power distribution network, and relates to the field of power system optimization scheduling, and the method comprises the steps: converting a voltage / current safety boundary of the power distribution network into the static safety boundary of the power distribution network through hyperplane linearization; establishing global safety margin indexes of the node voltage and the line current of the power distribution network, and introducing a safety margin weight coefficient to balance the priorities of the node voltage margin and the line current margin; determining margin income based on the global safety margin index and the safety margin weight coefficient, and establishing a dynamic weight adjustment mechanism to update the safety margin weight coefficient; constructing a target function based on the power generation cost of the main power grid, the new energy power abandoning penalty of the power distribution network and the margin income; and obtaining power grid data, and solving the main-distribution collaborative optimization model by using a quadratic programming method and the power grid data to obtain a main-distribution collaborative optimization scheduling scheme. According to the invention, bidirectional power interaction and collaborative optimization of the main power grid and the power distribution network are realized.

The invention discloses an intelligent opening and closing method and system for a reclosing circuit breaker based on an electromagnet, and relates to the field of intelligent control, and the method comprises the steps: monitoring a line current in real time, comparing the line current with a preset threshold value, and carrying out the opening after the overcurrent abnormality is detected. Entering a first time delay stage after opening, comprehensively evaluating the states of the circuit breaker and the circuit, and constructing a dynamic weight index system to calculate an evaluation score; if the score exceeds a threshold value, closing is carried out after time delay is finished, otherwise, an alarm is triggered. And entering a second delay stage after switching on, continuously monitoring the electric parameters and establishing an anomaly judgment mechanism, forming a closed-loop protection process of monitoring, switching off, evaluating, switching on and re-monitoring, and realizing intelligent linkage of overcurrent protection and state self-adaption. The method has the advantages that through real-time line electric parameter monitoring, multi-dimensional state evaluation and an intelligent decision-making mechanism, precise opening and closing of the circuit breaker are achieved, the power supply reliability is improved, the power failure time is shortened, and the misoperation risk is reduced.

The invention discloses an impedance-adjustable series hybrid cascade static synchronous compensator and a control method thereof. The method comprises the following steps: acquiring grid-connected point voltage and load current information, and performing positive and negative sequence component analysis on the grid-connected point voltage and load current information; calculating a compensation line current component with the same size and opposite phase as the positive and negative sequence components of the load current so as to compensate the reactive power and the negative sequence current of the grid-connected point load; zero-sequence injection current used for in-phase active power balance is calculated, and reference operation current of each cascade branch is obtained; calculating the output reactive power of each phase based on the cascade branch voltage of each phase and the reference operation current, calculating the corresponding trigger angle of each phase thyristor under the condition that the adjustable impedance bears all phase voltages and generates all reactive power, and generating a pulse control signal to realize the control of the adjustable impedance; and each phase cascade converter adopts quasi-proportional resonance control to track the reference operation current, and generates a corresponding PWM signal to respectively control each phase cascade converter.

The invention discloses a rapid spare power automatic switching device and method suitable for high-proportion distributed power supply access, and the device comprises a local sampling module which is used for collecting a local side bus voltage Ulocal and an incoming line current Ilocal; the switching value acquisition module is used for acquiring the TWJ state of the switch at the side; the communication module is used for communicating with an opposite-side remote transmission device through an HDLC protocol and acquiring opposite-side switch position information Kremote and an opposite-side voltage state Uremote; programmable logic is arranged in the logic processing module, and the logic processing module is used for executing comprehensive judgment logic; and the control output module is used for executing opening and closing operation of the switch according to the instruction of the logic processing module. Compared with a traditional spare power automatic switching technology, the method effectively solves the problems of operation refusal and maloperation caused by access of the high-proportion distributed power supply, and remarkably improves the power supply reliability and the new energy consumption capability.

The invention relates to the technical field of electrical safety, and particularly discloses an arc fault protection method based on a circuit breaker intelligent algorithm, which comprises the following steps: S1, collecting a line current signal in real time, eliminating harmonic interference of a frequency converter from an original signal through an anti-aliasing filter, and converting the original signal into a digital signal; s2, processing the current signal by adopting a three-stage cascade wavelet analysis module, and outputting a dynamic peak-to-average ratio to S4; s3, detecting current disturbance based on a double-slide-rail window, outputting a disturbance positioning mark and a time-frequency feature to S4, judging a disturbance event, and positioning a starting point; s4, receiving the dynamic peak-to-average ratio of the S2 and the disturbance positioning mark and the time-frequency characteristics of the S3, performing path processing according to a characteristic analysis result, and adopting a direct interruption method and an electromagnetic radiation-current frequency domain cross validation method; s5, constructing an electric arc energy accumulation prediction model; according to the invention, the problems of weak arc leak detection, electromagnetic interference maloperation and delay are solved.

The invention discloses an electric energy meter terminal contact fault diagnosis method, system and device and a medium, and belongs to the technical field of power systems, and the method comprises the steps: obtaining the voltage and current of a plurality of electric energy meters in a same electric meter box, and processing the voltage and current; calculating a voltage difference value between every two electric energy meters in the same electric meter box; performing abnormal value detection on the voltage difference value; judging the electric energy meter of which the abnormal frequency exceeds a first preset threshold value and the average voltage is lower than that of other electric energy meters as an arcing contact fault; for the electric energy meter which is not judged to have the arcing contact fault, calculating the resistance value of each electric meter line in the meter box according to the voltage difference value and the line current, and judging the terminal contact state of the electric energy meter which is not judged to have the arcing contact fault according to the resistance value; and outputting terminal contact state diagnosis results of all the electric energy meters. The electric energy meter terminal contact fault diagnosis method realizes accurate classification diagnosis of the electric energy meter terminal contact fault, does not need to depend on the same time point of the load, and can effectively distinguish loose contact and arcing contact faults.

The invention relates to the technical field of power transmission line load regulation and control, in particular to a power transmission line dynamic load regulation and control method suitable for a high-voltage power transmission system. Determining the fluctuation coefficient of the current load of the power transmission line at each moment; obtaining the frequency of the oil field high-voltage power transmission system at each moment, and taking the frequency as the center frequency of a Butterworth filter at each moment; determining the order of a Butterworth filter at each moment by using the numerical value of the fluctuation coefficient, and optimizing the Butterworth filter in combination with the center frequency and the order; and carrying out harmonic extraction on the current signal at each moment by using the optimized Butterworth filter, and carrying out current compensation based on a harmonic component. The precision of power transmission line load regulation and control is improved.

The invention provides a digital twin line protection parameter identification and model updating method and system based on a time domain method, and belongs to the technical field of power system relay protection. Model and calculation complexity are considered, and a line and reactors at the two ends are equivalent to an accurate pi model; solving the accurate pi model capacitance value of the line by using a generalized KCL and a least square method; solving a line current by using the accurate pi model capacitance value; identifying an impedance parameter by using the line current; determining a parameter updating threshold according to the redundancy of the dynamic state equation; residual errors are calculated through the identified line parameters and the state equation; if the residual error is greater than the parameter updating threshold value, not updating the twinborn model; otherwise, updating the twin model. According to the method, the line is equivalent to the accurate pi model, the twin model is constructed according to the identified parameters, the protection criterion is constructed according to the matching degree of the twin model and the actual model, the protection quickness and reliability are improved by using the state estimation redundancy characteristic of the instantaneous value, and the instantaneous parameter identification accuracy is improved.

The invention discloses a medium-voltage voltage regulating circuit, system and method, and belongs to the technical field of medium-voltage power distribution. The medium-voltage voltage regulating circuit comprises a tapped voltage regulating transformer Tr1, a voltage compensation unit, a current compensation unit and a direct-current supporting unit, the self-coupling winding of the Tr1 and the series transformer of the voltage compensation unit are connected in series to a medium-voltage main circuit, the parallel winding of the current compensation unit and the self-coupling winding of the Tr1 share a magnetic core and take the self-coupling winding of the Tr1 as a primary side and a secondary side, and the direct current sides of the power module of the voltage compensation unit and the power module of the current compensation unit are both connected to the direct current supporting unit. Wide-range voltage coarse adjustment is achieved through the Tr1, stepless voltage fine adjustment is achieved through the voltage compensation unit, meanwhile, the topological structure is simplified through the common magnetic core coupling design of the self-coupling winding and the parallel winding of the Tr1, the equipment size, the magnetic loss and the manufacturing cost are reduced, and the stability and reliability of a medium-voltage power distribution system are remarkably improved.

The invention relates to a method for monitoring a multi-line device cell (12) for a technical device (1), the device cell (12) having a plurality of sub-cells (21) electrically connected in parallel to one another, comprising the following steps: detecting (S3) a line current through each of the sub-cells (21), determining (S4) a balancing current from the line currents, a balancing current flows through each of two of the sub-cells (21), and if at least one of the balancing currents exceeds a predefined balancing current threshold, a fault or an abnormality is signaled (S5, S6).

The application discloses a kind of conductor operation risk assessment method, system and its terminal equipment, belong to conductor state assessment technical field, this method is: based on real-time operating tension and conductor structure parameter acquisition interlayer comprehensive contact thermal resistance set;Based on real-time line current, conductor structure parameter and preset skin effect coefficient calculation unit length heat generation rate, based on unit length heat generation rate and interlayer comprehensive contact thermal resistance set constructs radial temperature distribution thermal circuit model;Conductor surface layer temperature and ambient temperature are input in radial temperature distribution thermal circuit model to obtain real-time temperature;Based on real-time temperature and temperature-mechanical property degradation model obtains tensile strength, to based on tensile strength and conductor structure parameter calculation limit bearing capacity;Based on real-time operating tension to obtain actual share load and calculate safety margin, to based on safety margin and preset safety threshold value output the risk assessment result of to-be-measured conductor, realize to the precise dynamic evaluation of each layer failure risk in conductor internal.

The invention discloses a power transmission line induction power taking system and a self-adaptive variable step size maximum power tracking method. The power taking system comprises a CT type induction power taking unit, the CT type induction power taking unit is connected with a rectification circuit, the rectification circuit is connected with a filter circuit, and the filter circuit is connected with a DC-DC circuit. The power taking system further comprises an MOS tube arranged on the rectification side, the MOS tube serves as a bypass switch and is connected with the controller, and the controller is connected with the voltage and current sampling circuit and the load. When the output power needs to be reduced, the MOS is conducted. The controller controls the work of each module and monitors sampling signals of voltage and current in real time. If the output voltage exceeds the discharge voltage, the bypass switch MOS tube needs to be controlled to be conducted, and when the current of the power transmission line is low, power can be taken at the maximum power. The maximum power tracking algorithm realizes dynamic stability of the power under the condition that the voltage and the current are stable. The automatic adjustment step length is designed based on the self-adaptive variable step length perturbation and observation method, and the maximum power point can be tracked at a high speed and with high precision.

The application discloses a power stealing point detection method, device, system, server and medium. The method is applied to a power distribution network system, the system comprises at least one main line, at least one first-level branch line and at least one second-level branch line; the method comprises the following steps: acquiring current signals of each main line, each first-level branch line and each second-level branch line; acquiring incoming line current signals on each main line, each first-level branch line and each second-level branch line; judging whether the incoming line current signals of each main line, each first-level branch line and each second-level branch line are same as the sum of the current signals of each main line; if not same, judging whether any main line current signal is same as the sum of the current signals of each corresponding first-level branch line and the sum of the incoming line current signals on the main line; if same, judging whether any first-level branch line current signal is same as the sum of the current signals of each corresponding second-level branch line and the sum of the incoming line current signals on the first-level branch line; if not same, judging that a power stealing point is on the first-level branch line.

The invention discloses a current differential protection adaptability analysis method for an alternating current line of a new energy network flexible direct output system, and belongs to the technical field of power system relay protection. Establishing a system fault equivalent model based on a low-voltage ride-through control strategy of power electronic equipment at two sides of the outgoing line; according to different asymmetric fault types and a fault point boundary condition equation, deriving mathematical models of positive-sequence, negative-sequence and zero-sequence currents on the two sides of a fault phase line; calculating a differential current and a braking current, and establishing a function relationship between the differential current and the braking current and the VSG internal potential reference value, the transition resistance and the current sequence component ratio; and the action sensitivity of protection under different working conditions is judged by comparing the current differential protection ratio braking coefficient setting value with the current differential protection ratio braking coefficient setting value. The association rule of the current differential protection refusal risk and the low-pass control parameters under the high transition resistance fault is disclosed, a basis is provided for protection setting and control strategy optimization of a network construction flexible direct output system, and the problems that a protection adaptability analysis method is weak and the influence rule of the control parameters is not clear yet are solved.

The invention discloses a graphical fault distance measurement method and system, relates to the field of traction substation tripping fault mark distance measurement in the railway industry, and can read a fault report of a fault distance measurement device and constant value parameter configuration of the fault distance measurement device off line, and calculate and analyze a fault type, whether line current is balanced or not and a fault distance according to the data and parameters. And a result is graphically displayed, so that the distance measurement error range can be narrowed by modifying and verifying the constant value parameters, and the corrected constant value parameters are exported and stored, thereby achieving the purposes of facilitating fault analysis, improving the working efficiency and shortening the maintenance time. Maintenance personnel are helped to quickly find out fault points, timely process faults and recover normal operation of lines, and the method is very important for safe, reliable and efficient transportation of a railway system.

The invention discloses a line current differential protection false information detection method based on a delay observer, and is applied to the technical field of line current differential protection. Comprising the following steps: establishing a distribution parameter model of the power transmission line, and discretizing the distribution parameter model to obtain a discrete model of the power transmission line; constructing a delay observer based on the discrete model of the power transmission line, solving a parameter matrix of the delay observer, and estimating a negative sequence voltage predicted value at the current moment; reading a negative sequence voltage measured value at the current moment, and calculating an error between the negative sequence voltage predicted value and the negative sequence voltage measured value; and if the error is greater than a preset error threshold value, judging that the line current differential protection system is attacked by false information injection. According to the method, false information injection can be effectively identified by monitoring the negative sequence voltage prediction error, and the reliability of current differential protection and the safe operation level of a power grid are improved.

A voltage-controlled bridge is coupled to the line voltage and the transformer primary harmonic voltage, while a current-controlled bridge is coupled to the line current and the transformer secondary harmonic voltage. A synchronous average harmonic current compensator synchronously integrates the error between the measured bridge current and the command current every half-switch cycle and samples the compensator output to control the line current and linearize the harmonic coupling between the isolation bridges. A synchronous pulse-width modulation process tracks the commanded line voltage. One or more of the primary and secondary harmonic command circuits regulate the harmonic coupling voltages of the voltage-controlled and current-controlled bridges, respectively. The line voltage, line current, and primary and secondary harmonic commands provide generalized line and isolation voltage bus regulation freedom within a single stage.

The application belongs to the technical field of integrated circuits, and discloses a circuit structure for one-step solution of linear equations based on a memristor array, wherein the linear equations are Ax=b, and in the circuit, a first memristor array matrix operation core realizes mapping of the matrix A, takes a negative value of a first operation voltage vector as a bit line voltage, performs a matrix multiplication operation, reads a word line current as a first operation current vector after the operation, a bias mapping module maps b into a bias current vector, a current superposition module superimposes the first operation current vector and the bias current vector to generate a superimposed current vector, and converts the superimposed current vector into a second operation voltage vector through a transimpedance amplifier module, a second memristor array matrix operation core realizes mapping of the matrix A, takes the second operation voltage vector as a bit line voltage, performs a matrix multiplication operation, reads a word line current, and performs an integral operation on the word line current through an integrator module to obtain an updated first operation voltage vector. T The above hardware circuit can realize solution of the linear equations.

A system for harvesting power from AC current in a power line, including a split magnetic core having two halves, wherein the two halves of the magnetic core are configured to enclose around the power line; a coil is wrapped around one or two halves of the magnetic core with a first end and a second end of the coil configured to provide current from the coil; a power harvesting circuit is configured to harvest current from AC current in the power line, the power harvesting circuit including a rectifier and at least one voltage multiplier electrically connected in parallel to the rectifier; and wherein an output of the coil is connected to an input of said power harvesting circuit and an output of the power harvesting circuit is configured to supply voltage and current to load circuits.

This invention relates to a dual-loop converter for a linear-rotating switched reluctance generator and its control method. The drain of the positive switching transistor of each phase of the rotating generator unit is connected to a first positive circuit, and the source of the negative switching transistor of each phase of the rotating generator unit is connected to a first negative circuit. One end of a load resistor is connected to a first load circuit and a second load circuit connected in parallel, and the other end of the load resistor is connected to a third load circuit and a fourth load circuit connected in parallel. The cathode of the diode of each phase of the rotating generator unit is connected to the first load circuit, and the positive terminal of the winding of each phase of the rotating generator unit is directly connected to the third load circuit. The cathode of the diode of each phase of the DC generator unit is connected to the second load circuit, and the positive terminal of each phase of the DC generator unit is directly connected to the fourth load circuit. This invention solves the technical problems of existing converters using a large number of components and having high line current pressure.