83 results about "Line resistance" patented technology

The invention discloses an electric energy quality loss test method, system and device and a medium. The method comprises the following steps: acquiring three-phase voltage data and three-phase current data; calculating the equivalent total loss power in the power distribution network line through the apparent power value, the voltage and the resistance based on the collected voltage and current data; and based on the equivalent total loss power, in combination with the power factors of different line losses, carrying out line loss subentry decoupling to obtain additional line losses caused by different electric energy quality problems. According to the invention, extra loss of the line caused by electric energy quality can be accurately measured, and line resistance does not need to be measured.

The invention provides a test structure and a test method thereof, which are applied to the technical field of semiconductors. In the invention, a first tested element and a second tested element are arranged in a mutually separated manner along a first direction, each pad group comprises a first sub-pad and a second sub-pad which are arranged in a mutually separated manner, electric connecting wires comprise a first electric connecting wire and a second electric connecting wire, and the sizes of the first sub-pad and the second sub-pad are set to be the same. The resistance values of the first electric connecting wire and the second electric connecting wire are the same, so that when the same probe is used for testing the first tested element and the second tested element, the contact resistances between the first sub-bonding pad and the second sub-bonding pad which are the same in size and the probe are the same; the resistance values of the first electric connecting line and the second electric connecting line with the same resistance value can be offset during difference operation, so that the influence of the contact resistance and the resistance of the electric connecting lines in the transistor element on the measurement accuracy of the on-resistance of the transistor element is avoided, namely, the purpose of reducing the measurement error is achieved.

The invention discloses a semiconductor structure, a manufacturing method thereof and electronic equipment. The semiconductor structure includes: an active pillar extending in a vertical direction; the word line extends along a first horizontal direction and is coupled with the active column to form a transistor; bit lines extending along a second horizontal direction and coupled to the active pillars, where the second horizontal direction intersects the first horizontal direction; wherein the word line comprises a first conductive pattern and a second conductive pattern, the first conductive pattern is provided with first openings and second openings, the first openings and the second openings are alternately arranged in the first horizontal direction, the active columns are located in the first openings, and the second conductive pattern is located in the second openings. The resistivity of the second conductive pattern is smaller than the resistivity of the first conductive pattern. The semiconductor structure is beneficial to reducing word line resistance and improving device performance.

The application provides an Ethernet-based linear series monitoring system and related equipment, the linear series monitoring system comprising a host device and a plurality of slave devices, a main power supply tap being led out from a secondary coil of each first coupling transformer, and an output end of a first power supply unit being connected with each main power supply tap; a primary tap being led out from a primary coil of each second coupling transformer, and a secondary tap being led out from a secondary coil of each third coupling transformer, a primary tap of an nth second coupling transformer in the same slave device being connected with a secondary tap of an nth third coupling transformer; and the primary taps of the N second coupling transformers in the same slave device all being connected with an input end of a rectifier unit. After the first power supply unit starts to supply power, parallel power supply is performed through 2N wires, so that the equivalent comprehensive line resistance is reduced, the voltage drop and loss are reduced, and the stability of line power supply is improved.

The utility model relates to the technical field of electronic equipment, in particular to a camera module capable of preventing signal interference, which comprises a PCB (printed circuit board) and a fixed base, and is characterized in that the fixed base is positioned above the PCB and is fixedly connected with the PCB, a lens component is arranged on the fixed base, a sensing component is arranged on the surface of the PCB, and the lens component is positioned above the PCB. The lens assembly comprises a lens body, a wide angle and a protective cover, through cooperative use of the above structures, signal attenuation is reduced, a USB interface is close to the edge, connection with external equipment is facilitated, the integrity of USB signals is ensured through reasonable wiring layout, and for high-speed signals such as a camera image data transmission line, the data transmission efficiency is improved. A differential wiring mode is adopted, and the wiring length and spacing are strictly controlled so as to match impedance, reduce signal reflection, thicken power supply wiring, reduce line resistance, ensure the stability of power supply and reduce the power consumption of the camera.

The invention discloses a maximum reactive voltage regulation method at the tail end of a rural power grid in an interference environment. According to the method, if it is monitored that the voltage of the load side of the tail end of the rural power grid is smaller than a first preset threshold value, reactive power increased according to a first preset rate is injected into the tail end of the rural power grid, and the ratio of line resistance to reactance of the rural power grid is larger than 1; in the process of injecting the reactive power to the tail end of the rural power grid, obtaining the voltage of the load side of the tail end of the rural power grid according to a preset time interval, and if the first difference value is smaller than a second preset threshold value and larger than a second difference value and the second difference value is larger than 0, controlling the magnitude of the injected reactive power to be unchanged, the first difference value is the difference value between the voltage obtained for the (i + 1) th time and the voltage obtained for the ith time, and the second difference value is the difference value between the voltage obtained for the (i + 2) th time and the voltage obtained for the (i + 1) th time, so that the voltage of the load side at the tail end of the rural power grid is always kept in a target state; and the dynamic balance between the power supply capability and the power demand is realized.

The present application relates to the technical field of automatic guided vehicle power supply control and intelligent power distribution, and particularly relates to a mobile robot intelligent multi-channel controllable power distribution system and a short circuit protection method thereof, the system comprising: a sensing module, which collects environmental temperature and humidity, circuit board surface temperature, power supply channel input voltage and power supply channel output current, and receives target demand current to generate a set of operating parameters; a dew point calculation module, which calculates air dew point temperature based on the set of operating parameters. In the present application, by correlating multi-dimensional parameters such as environmental temperature and humidity, line resistance change, transient voltage drop and mechanical transmission resistance, the system can dynamically adjust the protection boundary by comprehensively considering the physical environment state and electrical operation data, reducing the difficulty in distinguishing between environmental interference and real electrical fault due to the use of fixed protection threshold, and improving the overall power supply stability of the automatic guided vehicle in complex scenarios such as temperature difference alternation and load mutation.

The utility model relates to the field of detection equipment, in particular to a detection device and current detection equipment. The detection device comprises a substrate, a sampling resistor and a plurality of reserved bonding pads. The plurality of reserved bonding pads are arranged on the substrate, the plurality of reserved bonding pads are connected in parallel, and at least one reserved bonding pad is welded with a sampling resistor; the reserved bonding pad comprises bonding pad assemblies which are oppositely arranged; the bonding pad assembly comprises a first bonding pad and a second bonding pad which are arranged at an interval; the first bonding pads of the bonding pad assemblies on the same side are connected with each other and are used for connecting a circuit to be detected; the second bonding pads of the bonding pad assemblies on the same side are connected with each other and used for being connected with a voltage detection line. One end of the sampling resistor is connected with the first bonding pad and the second bonding pad of the bonding pad assembly on one side of the reserved bonding pad, and the other end of the sampling resistor is connected with the first bonding pad and the second bonding pad of the bonding pad assembly on the other side of the reserved bonding pad. According to the detection device provided by the invention, the influence of the line resistance of the reserved bonding pad which is not welded with the sampling resistor on voltage detection can be avoided, so that the detection precision is improved.

The invention provides a load balancing and voltage compensation method and device based on an electromagnetic element, and the method comprises the steps: controlling a zero-sequence current filter connected in parallel with a low-voltage power distribution network line, blocking the zero-sequence fundamental current and zero-sequence higher harmonic current of a load from flowing into a zero line, transferring the preset part of the maximum phase current in the three-phase load to the other two phases, reducing the maximum phase current and the line resistance voltage drop; controlling the three-phase multi-stage split-phase switched capacitor bank, compensating the reactive power of the line and reducing the negative sequence component of the current of the line, so that the current of the three-phase line reaches a preset balance degree value; reducing the overvoltage of the other two phases, increasing the voltage corresponding to the maximum phase current, and preventing the bidirectional out-of-limit of the voltage of the three-phase unbalanced load; and controlling a remote communication module to remotely monitor the running states of the zero-sequence current filter and the three-phase multi-stage split-phase switched capacitor bank. The stability and the electric energy quality of the power distribution network can be effectively improved.

The application belongs to the technical field of electric power, and provides a DC micro-grid system and a secondary control method of the DC micro-grid. The voltage compensation module, the droop control module, the steady-state current distribution compensation module, the dynamic current distribution compensation module and the voltage and current loop control module of the DC micro-grid system work cooperatively to ensure the accurate distribution of load current among different distributed power generation units, and improve the power quality and robustness of the DC micro-grid. The DC micro-grid system introduces compensation voltage to be used for bus voltage recovery and offsetting the influence of line resistance on the steady-state current distribution accuracy. The voltage and current loop control module adopts a cascaded voltage and current loop control mode to ensure that the output voltage of the distributed power generation unit converter closely tracks the reference output voltage, so as to realize the accurate distribution of load current among the distributed power generation units and improve the power quality of the DC micro-grid.

The utility model provides a gun head line detection device, relates to the technical field of detection devices, and aims to solve the technical problem that a gun head line needs to be detected in the production process of a charging gun in the prior art. A gun head line detection device comprises a rack, a first connecting base, a micro-resistance tester, a safety tester and a control system, the first connecting base is connected to the rack and connected with at least two first sockets used for being connected with a gun head, the micro-resistance tester is connected to the rack, the safety tester is connected to the rack, and the control system is connected with the micro-resistance tester. The control system is electrically connected with all the first sockets, the micro-resistance tester and the safety tester; the control system selects the micro-resistance tester to carry out micro-resistance testing on each line, and if the resistance value of the line resistor is smaller than a set value, wiring is correct; and then the control system selects the safety tester to test the insulation resistance of each line, and if the insulation resistance is greater than a set value, the line is not damaged.

The invention discloses a line resistance compensation method for long-line transmission of a magnetic flux cable force sensor, and the method comprises the steps: installing the magnetic flux cable force sensor at a working measurement point for detection, adjusting a magnetic induction voltage signal outputted by the magnetic flux cable force sensor through a signal conditioner, and transmitting the magnetic induction voltage signal to a data processing system for processing through a high-speed analog-to-digital converter; the data processing system adopts a least square polynomial to fit the signal, and obtains a quantization integral value of a working measurement point; and taking the obtained quantized integral value of the working measurement point as an interpolation point, realizing optimization of the quantized integral of the working point by using a bilinear interpolation algorithm, and solving the relative permeability and the stress value of the working measurement point according to the optimized quantized integral value of the working point. According to the invention, the problem that the accuracy of cable stress measurement is influenced by factors such as sensor signal noise and cable impedance is solved, and the measurement precision of magnetoelastic effect stress detection of the magnetic flux cable force sensor is improved.

The invention relates to the technical field of electric signal processing, in particular to an impedance model construction method and system of a new energy flexible low-frequency sending-out system. The method comprises the following steps: recording real-time timing sequences of voltage and current of a converter bridge arm under different working conditions; extracting a time interval between the voltage peak value and the current peak value, a voltage waveform slope change rate and a current waveform oscillation period, and labeling corresponding working condition labels to form a bridge arm dynamic feature library; and identifying the voltage waveform and the current waveform of the converter bridge arm, and synchronously recording the line resistance and the line reactance between the converter stations. According to the invention, through integration of the bridge arm dynamic features, construction of the bridge arm dynamic feature library and high-frequency correction cooperation, adaptive optimization of bridge arm parameters and construction of the impedance model of high and low frequency bands are realized, so that the matching efficiency of the impedance model is improved.

A semiconductor structure includes a plurality of vertical transport field effect transistors, and an interconnect structure connected to one of respective source / drain regions of at least two vertical transport field effect transistors of the plurality of vertical transport field effect transistors and respective gate regions of the at least two vertical transport field effect transistors. The interconnect structure comprises a damascene portion, and a subtractive portion disposed on the damascene portion.

The application belongs to the field of inverter network type control, and discloses a schedulable virtual oscillator control method based on a consistent algorithm adaptive virtual resistance. a 、 β Two-phase output voltage, coordinate transformation is carried out on the output voltage to obtain u d3 、 q3 ; reactive power Q1 on the inverter side and reactive power Q2 on the load side are input into reactive power distribution control to obtain distribution error uQ1, and then virtual impedance correction term deltaQ1 is obtained, deltaQ1 is input into adaptive virtual impedance to obtain dynamic impedance L V1 and R V1 , i d , i q are multiplied by L V1 and R V1 to obtain virtual voltage u d2 and u q2 ; u d2 is subtracted from u d3 to obtain u d4 , u q2 is subtracted from u q3 to obtain u q4 , u d4 and u q4 are input into voltage and current double closed loop to obtain a pwm signal. The application can solve the problem that the dynamic stability of the existing virtual oscillator is strictly required for line parameter ratio, can guarantee power quality when the line resistance and inductance ratio changes, reduces the design difficulty, and increases the dynamic stability of the system.

The application relates to the field of new energy grid connection technology, and discloses a parameter identification method, device and equipment based on a park energy system and a medium, the method comprising: acquiring a plurality of to-be-identified parameters of the park energy system, the plurality of to-be-identified parameters comprising line resistance, line inductance, line capacitance, capacity of a wind power converter, capacity of a photovoltaic inverter, transformer short-circuit impedance, proportional gain coefficient of the photovoltaic inverter, integral gain coefficient of the photovoltaic inverter, control parameter of the wind power converter and harmonic attenuation coefficient; generating a comprehensive deviation corresponding to each parameter combination according to a comprehensive deviation function, selecting a parameter combination with the minimum comprehensive deviation as a target parameter combination of the park energy system, and completing grid connection of the park energy system and a public power grid according to the target parameter combination. The application can improve the identification efficiency of the target parameter combination of the park energy system, and the target parameter combination can provide strong guarantee for safe grid connection of the park energy system.

The invention provides a novel single-stage current source type direct current power flow controller, and aims to solve the problem of power flow regulation and control between distributed renewable energy sources and a direct current power grid. The controller reduces the loss of the transformer through a partial power flow mode, has the ZCS soft switching capability, and reduces the power conversion loss. The topological structure is composed of a transformer primary side half-bridge, a transformer and a secondary side half-bridge, and power flow regulation and control are achieved by adjusting output voltage. The controller can effectively work during bidirectional tidal current flow, and is suitable for occasions with large line resistance change. Simulation verification shows that the controller has excellent adjusting capability and efficiency in a Plecs environment, and powerful support is provided for flexible control of a direct current power grid.

The present application relates to the technical field of intelligent diagnosis analysis, and more particularly to a transformer area line loss intelligent diagnosis analysis method, the present application judges the cable insulation skin form by acquiring image data, and combines the real-time control area to execute different protection measures on the abnormal cable; in the compliance form, further judge the current period, and determine the power consumption based on the power cost and the power consumption matching degree, distinguish the load fluctuation and the load overload, and start the power consumption parameter analysis program under different conditions, through the detection of the actual control number, the real-time current fluctuation frequency and the line resistance, calculate the correction collection coefficient, and then select the corresponding line loss protection or abnormal alarm mode. The present application integrates visual detection, power consumption matching, current fluctuation and line resistance and other multi-source real-time parameters, realizes the accurate distinction of power failure, instability and electricity stealing and other various power supply abnormal states, and uses dynamic correction collection coefficient to improve the timeliness and accuracy of data collection.

The invention relates to a method for predicting a current distribution in parallel-connected batteries using a closed-loop control system. Method 100 involves receiving critical battery parameters, including state of health (SoH), open-circuit voltage (OCV), and high-voltage direct current (HVDC) terminal voltage, along with current values ​​from several batteries. An equivalent line resistance is estimated based on these parameters, enabling the determination of a predicted current distribution ratio. The predicted ratio is compared with the actual current distribution at a subsequent time. To correct any discrepancies, Method 100 employs feedback filters to refine the predicted current distribution.The dynamic prediction process ensures that battery currents remain within safe limits, improving system efficiency and extending battery life for optimal performance.

The present application relates to the technical field of automatic guided vehicle power supply control and intelligent power distribution, and particularly relates to a mobile robot intelligent multi-channel controllable power distribution system and a short circuit protection method thereof, the system comprising: a sensing module, which collects environmental temperature and humidity, circuit board surface temperature, power supply channel input voltage and power supply channel output current, and receives target demand current to generate a set of operating parameters; a dew point calculation module, which calculates air dew point temperature based on the set of operating parameters. In the present application, by correlating multi-dimensional parameters such as environmental temperature and humidity, line resistance change, transient voltage drop and mechanical transmission resistance, the system can dynamically adjust the protection boundary by comprehensively considering the physical environment state and electrical operation data, reducing the difficulty in distinguishing between environmental interference and real electrical fault due to the use of fixed protection threshold, and improving the overall power supply stability of the automatic guided vehicle in complex scenarios such as temperature difference alternation and load mutation.

The invention belongs to the technical field of marine lead-acid storage battery periodic treatment and maintenance, and discloses a marine standby low-voltage storage battery long-distance large-current discharge load device which is composed of a multi-gear direct-current power supply boosting unit and a multi-gear discharge resistive load unit. The multi-gear direct-current power supply boosting unit comprises a multi-gear three-phase rectifier transformer and a three-phase full-wave rectifier bridge, and the three-phase full-wave rectifier bridge outputs multi-stage direct-current stable voltage through variable line voltage output of the secondary side of the multi-gear three-phase rectifier transformer; the multi-gear resistive load unit is used for forming loads with different resistance values through parallel matching of load gears with different resistance values; the load device is connected with a marine standby low-voltage storage battery through a direct-current circuit breaker. Line loss and voltage drop caused by line internal resistance in long-distance line connection can be eliminated, and the problem that long-distance large-current discharging of the marine standby low-voltage storage battery through a discharging load is difficult to achieve is solved.

The invention relates to a power transmission line direct-current ice melting method and system, a terminal and a storage medium, and relates to the technical field of high-voltage and ultrahigh-voltage power transmission line ice melting operation, and the method comprises the steps: obtaining the loss degree of each preset power transmission line of a power transmission line; analyzing the loss degree of each power transmission line to determine the ice melting current of each power transmission line; acquiring a line resistance parameter of the power transmission line; analyzing the ice-melting current and the line resistance parameters of each power transmission line to determine the actual ice-melting voltage; and controlling a preset power transmission line direct-current ice melting device to perform ice melting operation on the power transmission line according to the actual ice melting voltage. The service life of the power transmission line is prolonged.

The invention provides a method and system for improving new energy transmission power in a low-short-circuit-ratio electric power system, and the method comprises the steps: when the terminal voltage is smaller than a set voltage threshold value, according to the voltage threshold value, the current active power and the current reactive power of a new energy terminal, calculating the new energy transmission power according to the current active power and the current reactive power of the new energy terminal; calculating incremental reactive power to be input by new energy according to infinite power supply voltage, equivalent line resistance and equivalent line inductance which are determined when the new energy grid-connected system is equivalent to a single-machine infinite system; calculating a capacitance value of a capacitor to be input at a new energy machine end according to the incremental reactive power; and inputting at least one capacitor in a capacitor cluster of the new energy machine end according to the capacitance value until the new energy transmission power reaches the power threshold value. According to the method and the device, the reactive power is increased by adjusting the capacitance value of the new energy machine end, the transmission power of the new energy power generation system is improved to the full power, and the bottleneck of the transmission capacity of a traditional new energy power generation system is effectively broken through.

This application relates to a method and apparatus for determining the limiting range of line resistance in a DC transmission system, a voltage control method and apparatus for a DC transmission system, computer equipment, storage medium, and computer program product. The method includes: measuring and obtaining the line temperature and corresponding line resistance value of the DC transmission line; calculating and determining the maximum and minimum resistance values ​​of the line as the line temperature changes based on the line temperature and line resistance value; and determining the limiting range of the line resistance based on the maximum and minimum resistance values. Using this method can improve the stability of the DC transmission system.

The invention belongs to the technical field of parallel control, and relates to a multi-battery-pack parallel control method and electronic equipment. The open-circuit voltage of each battery pack is collected, full open-circuit or grouping processing is judged according to the open-circuit voltage, dynamic pack combining decision based on the battery state is achieved, the system can automatically select a cooperation mode according to the voltage difference, and the stability of energy supply of the multiple battery packs is improved; and secondly, the leads from the battery packs to the bus are designed to be equal in length, so that the phenomenon of non-uniform current distribution caused by wire resistance difference is reduced, the charge and discharge load is more balanced, the system efficiency is improved, and the service life of the battery packs is prolonged. Therefore, the problems of insufficient dynamic packet merging decision and unbalanced line resistance can be solved at the same time, and the system performance and adaptability are remarkably improved.

The invention discloses a distributed new energy collaborative fault voltage support control method and system, and relates to the field of power distribution networks, and the method comprises the steps: determining the voltage drop between two nodes based on the obtained active power, reactive power and grid-connected point voltage of photovoltaic input, and the line resistance and line reactance between the two nodes; when it is detected that the voltage drop of the grid-connected point reaches a preset threshold value, entering an initial compensation stage, introducing a dynamic compensation coefficient into the photovoltaic system, determining an initial reactive current, and injecting the initial reactive current into a power grid to support the voltage of the power grid; when it is detected that the voltage drop of the grid-connected point is larger than a preset threshold value, critical voltage is obtained, and a coordinated compensation stage is entered; when the obtained voltage drop is smaller than the critical voltage, active current and reactive current are distributed according to the impedance ratio so as to support the power grid voltage; otherwise, the initial compensation coefficient and the adjustment coefficient are introduced into the photovoltaic system to increase the reactive current so as to support the power grid voltage.

The invention discloses a power distribution network system state evaluation method, system and device based on high-proportion new energy access and a medium, and belongs to the technical field of power distribution network system state evaluation, and the method comprises the steps: obtaining the operation data of a power distribution network, and determining the internal loss energy of a line in the power distribution network according to the operation data; determining the energy unbalance amount of the power distribution network based on the internal loss energy; generating a health state score of the power distribution network based on the energy unbalance evaluation; and outputting early warning of the power distribution network according to the health state score. When the internal loss energy is determined, the influence of the thermal parameters on the line resistance is considered, and the influence of the voltage change in the electrical parameters on the line loss is considered; when the health state score is evaluated, the real-time state of the energy unbalance and the historical fluctuation quantification result of the energy unbalance are considered. The accuracy and timeliness of power distribution network health state evaluation are improved, the operation safety of the power distribution network is improved, and the state monitoring capability of the power distribution network is enhanced.

The application discloses a network-constructing energy storage coordinated control method for supporting grid voltage stability, and steps are as follows: real-time acquisition of state information and network-constructing energy storage output current; when the network-constructing energy storage output current does not reach an overcurrent limiting threshold, the network-constructing energy storage is controlled to adopt a constant voltage amplitude operation mode, the voltage amplitude of a node connected with the network-constructing energy storage is maintained to be equal to a reference value, so that a P-V characteristic curve of a load side is reshaped, the maximum transferable power of the load side is improved, and a static voltage stability margin is increased; when overcurrent occurs in the network-constructing energy storage, the network-constructing energy storage is switched to an overcurrent operation mode, in which mode, the network-constructing energy storage output active power and reactive power are distributed according to the ratio of line resistance to reactance between a grid node and a node connected with the network-constructing energy storage; and when the network-constructing energy storage output current falls below a preset recovery threshold, the constant voltage amplitude operation mode is restored. The application can improve the static voltage stability limit of a load node and the continuous voltage support capability of energy storage to the load under an overcurrent condition.

Embodiments herein disclose configurations of metal layers of an interconnect structure that can improve memory performance, such as static random access memory (SRAM) memory performance, and / or logic performance. For example, embodiments herein place bitlines in a metal one (M1) layer, which is the lowest metallization level of the interconnect structure of a memory cell, to minimize bitline capacitance, and configure the bitlines as the widest metal lines of the M1 layer to minimize bitline resistance. In some embodiments, the interconnect structure has a dual wordline structure to reduce wordline resistance. In some embodiments, the interconnect structure has a dual voltage line structure to reduce voltage line resistance. In some embodiments, steps are added to the wordlines and / or voltage lines to reduce their respective resistances. In some embodiments, via shapes of the interconnect structure are configured to reduce resistance of the interconnect structure. Embodiments of the invention also relate to integrated circuit structures and methods for forming a multi-layer interconnect structure of a memory.

The invention discloses a DC change-over switch current parameter design method and a related device, and the method comprises the steps: converting a topological structure of a target multi-terminal DC system into an equivalent circuit composed of a DC change-over switch and a line resistor; determining the state combination of each switch in the equivalent circuit, the resistance value range of each line resistor and the output power range of each converter station according to the system operation condition, and carrying out the iterative calculation of the current flowing through each DC change-over switch under each switch state combination based on the ranges; the switch conversion current of each switch under all state combinations is obtained, and finally the current design parameters of each direct-current change-over switch are determined, the most unfavorable current condition of the system under the possible operation working condition can be comprehensively covered, it is ensured that the direct-current change-over switch design is safe and reliable, and the stability and reliability of operation of the multi-terminal direct-current system are improved.