43 results about "Load line" patented technology

The invention provides a power flow convergence method and system based on direct current power flow preprocessing and staged decoupling, and belongs to the field of power system analysis and control. Comprising the following steps: performing multi-stage verification and parameter adjustment on original power flow data, executing active balance preliminary verification of a power system, and generating a node active power set initial value set; setting an initial value set based on the active power of the nodes to carry out direct-current power flow calculation, obtaining an initial phase angle of each node, identifying a heavy-load line with a power angle difference exceeding a preset threshold value, and carrying out adjustment to obtain initial phase angle distribution; in combination with a preset initial voltage amplitude and the initial phase angle distribution, performing staging decoupling load flow calculation and adjustment to obtain load flow parameters; and taking the power flow parameter as an initial value, and carrying out full-coupling power flow calculation to obtain a final power flow solution meeting the convergence precision requirement. According to the method, the physical root of the convergence problem can be intelligently diagnosed and positioned, and the convergence and robustness of load flow calculation under complex working conditions are effectively improved through small-range targeted adjustment.

The invention provides a circuit design-process collaborative optimization method, a preparation method and a circuit based on an edge contact two-dimensional transistor, and aims at remarkably improving the load linearity, the output resistance and the switching stability of the two-dimensional transistor by adopting an edge contact process and optimizing the geometric parameters of the transistor according to the performance requirements of an analog circuit. The method specifically comprises the optimization design of the edge contact transistor, the characterization and improvement method of the load performance, and the system integration and application of the edge contact transistor in a high-performance analog circuit module. The invention provides a complete solution from transistor-level process optimization to circuit-level performance improvement, and provides a key technical path for design and manufacturing of high-linearity and high-stability analog and mixed signal integrated circuits based on novel two-dimensional semiconductors.

Certain aspects of the present disclosure generally relate to power supply circuits and techniques for load voltage drop compensation. An example power supply circuit generally includes: a power stage coupled between the power stage and an output node of the power supply circuit; a feedback circuit coupled to the output node of the power supply circuit and including a feedback node; a level-shifter circuit including an input coupled to the feedback node; and a first current source coupled between the level-shifter circuit and a node of the feedback circuit.

A wireless power transmitter can include an inverter that generates an AC voltage; a wireless power transmitting coil that receives the AC voltage from the inverter, the wireless power transmitting coil being couplable to a wireless power receiving coil of a wireless power receiver; and controller circuitry that operates the inverter to deliver power wirelessly, using the wireless power transmitting coil, to the wireless power receiver by: characterizing a load line corresponding to the wireless power transmitter, the wireless power receiver, and a relative position between the wireless power transmitter and the wireless power receiver using a plurality of wireless power transfer system parameters determined by in-circuit measurements; identifying a stability boundary associated with the load line; and operating the wireless power transmitter at a power level that causes the wireless power transmitter to remain on a stable side of the stability boundary for the characterized load line.

The application discloses a power grid key line comprehensive identification method based on a maximum deviation thought. Based on power grid structure information, combined with current operation state, four line key evaluation indexes of voltage stability, capacity margin, real-time failure rate and topological contact degree are established; based on the maximum deviation thought, a line comprehensive importance identification method considering subjective and objective weighting of different factors is proposed; a power supply capacity evaluation method of the system under line fault is proposed by adopting a control strategy of minimum load shedding amount of system optimal power flow, and it is verified that the identified lines are high-risk lines which will have a key influence on system operation. In the identification of the power grid key line, the application fully considers node voltage, line load, line fault, network topology and other information, considers the special situation of power grid splitting to form an island, excavates the information carried by the identification indexes, improves the identification accuracy of the power grid key line, and has guiding significance for the operation and maintenance management of the power transmission line.

A photovoltaic grid connection path switching control method considering historical data includes the following steps: Real-time acquisition of voltage waveform data at the photovoltaic grid connection point for the first time period before an overvoltage occurs, as the real-time waveform; retrieval of voltage waveform data from the same time period of the previous day from a historical database, as the historical waveform; alignment of the real-time waveform and the historical waveform along their time axes, and comparison of similarity at preset intervals; if the similarity of all comparison intervals within the first time period is greater than or equal to a first preset threshold, then the overvoltage switching strategy of the same time period of the previous day is directly invoked, controlling the photovoltaic switching device to switch the photovoltaic grid connection path to a dedicated line or load line; otherwise, the switching strategy is adjusted or regenerated according to the type of deviation, and the corresponding switching operation is executed. This method avoids the delay caused by complex calculations each time, and eliminates misjudgments caused by occasional interference or changes in operating conditions through similarity judgment, ensuring the accuracy and adaptability of the strategy.

The utility model relates to the technical field of electrical safety protection devices, in particular to a leakage protector with buzzing alarm and flashing prompt functions, which comprises a casing, a leakage detection module, a tripping mechanism and a control circuit, the leakage detection module is connected with a load circuit, and the tripping mechanism is connected with the control circuit. And the tripping mechanism is controlled by the control circuit to switch on and off the circuit, the sound-light alarm module and the fault type identification unit. According to the utility model, the problem that a user may not timely perceive the action of the leakage protector in some places where the environment is noisy or the attention of people is not concentrated, so that the leakage fault cannot be timely processed is solved, the environmental limitation is broken through through the acousto-optic cooperation of the multi-color LED lamp group and the buzzer, the fault is timely perceived, and the reliability of the leakage protector is improved. Electric leakage / overload is distinguished through light color and buzzing rhythm, and rapid maintenance is guided.

The present application relates to a power distribution system, comprising a distribution transformer circuit, a load circuit and a first energy storage device, wherein an output end of the distribution transformer circuit may be connected to an input end of the load circuit, so as to transmit electric energy to the load circuit, and the first energy storage device may be connected to a connection point between two load branches in the load circuit, so as to supply electric energy to the load circuit or absorb electric energy from the load circuit. It can be seen that in the embodiments of the present application, by means of providing a first energy storage device between two load branches in a load circuit, electric energy can be supplied to the load circuit or electric energy can be absorbed from the load circuit by means of the first energy storage device; therefore, the electric energy of a power distribution system can be adjusted to satisfy a change in a load, and the load pressure on an upstream circuit of an access point can also be greatly relieved, thereby facilitating an improvement in the reliability of the power distribution system.

A power supply adjustment method, applicable for a processor and a power supply controller, includes: obtaining working current of the processor, obtaining a target power parameter from a pre-stored multi-segment load line according to the working current, and controlling the power supply controller to supply power to the processor according to the target power parameter. The pre-stored multi-segment load line indicate the relationship between a plurality of preset currents and a plurality of preset power parameters, and includes a plurality of segments corresponding to different current ranges and having different slopes. A power supply adjustment device with multi-segment load line, applicable to a processor and a power supply controller, includes a reading wire and a control circuit. A motherboard with multi-segment load line includes a power supply controller and a processor.

Acoustic impedance tuning in a wireless transmission circuit (a.k.a. wireless device) is provided. In aspects discussed herein, the wireless transmission circuit includes an acoustic load-line tuning circuit that can be configured to adapt a load-line impedance presenting to a power amplifier circuit. In embodiments disclosed herein, the acoustic load-line tuning circuit can be dynamically controlled to provide impedance matching between a power amplifier circuit and other load-line circuits (e.g., filter circuits, antenna switch circuits, and / or antenna circuits). As a result, it is possible to reduce a signal reflection resulting from an impedance mismatch between the power amplifier circuit and the load-line circuits, thus helping to improve performance of the wireless transmission circuit.

Apparatus and methods for balun transformer circuits within electronic devices are provided. In certain embodiments, balun transformer circuits are used for reduction of an impedance of a differential load line of a differential power amplifier.

An electronic device may include wireless circuitry. The wireless circuitry may include at least a digital predistortion circuit, an upconversion circuit, and a load-line modulated amplifier circuit. The digital predistortion circuit can be configured to receive a reference baseband signal from one or more processors and to selectively output a predistorted version of the reference baseband signal. The upconversion circuit can be configured to receive a signal from the digital predistortion circuit and to output a radio-frequency signal. The load-line modulated amplifier circuit can be configured to amplify the radio-frequency signal. The load-line modulated amplifier circuit can include an adjustable load component. The adjustable load component can have a constant impedance when an instantaneous signal amplitude of the reference baseband signal is within a first range and can be tuned to have a varying impedance when the instantaneous signal amplitude of the reference baseband signal is within a second range.

This application provides an adaptive adjustment method for impedance matching network of a portable radio range extender, comprising: extracting the battery terminal voltage signal and transmit duty cycle from the radio's RF front end; analyzing the battery terminal voltage signal to identify the battery terminal voltage drop pattern and determining the tilt attitude of the drain dynamic load line under the depth of discharge; using an adaptive convergence algorithm to link the rising and falling direction of the tuning capacitor position with the reflection recovery pattern, and when the rising and falling direction is positive, increasing the tuning capacitor position; otherwise, decreasing the position to form a matching network setting; updating the rearranged links of the frequency positions in the memory tuning table according to the matching network setting to generate an adaptive adjustment link; and combining the adaptive adjustment link with the current battery terminal voltage drop pattern and the tilt attitude of the drain dynamic load line to optimize the reflection recovery pattern and determine the impedance mismatch tuning scheme.

1. Name of this design product: Solid State Relay Cover (Flip Cover). 2. Purpose of this design: This design is used to protect and secure signal lines and load lines. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the key design points: Design 1 front view. 5. Design 1 is designated as the basic design.

The application relates to an anti-losing control safe driving circuit and a true safe anti-leakage protector, which is characterized in that: the safe driving circuit HAKM is used as a core device of the true safe anti-leakage protector, two trigger input ends V i1 , i2 of the core device are connected with two ends of a mutual inductor H secondary n3, a resistance R10 is connected between an e end and a driving end V DL of the secondary n3, an alternating current input end V S2 is connected with a series connection capacitor C9, a resistance R7, a fuse RD and a thermistor PTC, the series connection capacitor C9, the resistance R7, the fuse RD and the thermistor PTC are connected with a load line L2, the alternating current input end V S1 is connected with the load line N2, a relay J coil is connected between the driving end V DT and V DL , and two groups of normally open contacts of the relay J control the primary n1 and n2 of the mutual inductor H and the alternating current power supply of the load. If leakage or self failure occurs, the relay J can reliably disconnect the alternating current power supply. It can be seen that the application can prevent various fault losing controls and ensure that the power utilization is safe.

The application provides a power flow convergence method and system based on DC power flow preprocessing and stage decoupling, and belongs to the field of power system analysis and control. The method comprises the following steps: performing multi-stage checking and parameter adjustment on original power flow data, performing preliminary checking on active power balance of a power system, and generating an initial active power setting value set of nodes; performing DC power flow calculation based on the initial active power setting value set of the nodes, obtaining initial phase angles of the nodes, identifying heavy-load lines with power angle differences exceeding a preset threshold, and obtaining an initial phase angle distribution through adjustment; combining a preset initial voltage amplitude with the initial phase angle distribution to perform stage decoupling power flow calculation and adjustment, and obtaining power flow parameters; taking the power flow parameters as initial values to perform full-coupling power flow calculation, and obtaining a final power flow solution meeting a convergence accuracy requirement. The application can intelligently diagnose and locate a physical root cause of a convergence problem, effectively improves convergence and robustness of power flow calculation under complex working conditions through targeted adjustment in a small range.

This invention discloses a load resistance identification method for a motor driver and a power element protection device thereof. First, it detects the motor's rotational speed. If the speed is less than a first value, it indicates the load is blocked. If the speed is greater than the first value but less than a second value, it indicates the load is not completely blocked. Next, it detects the phase current of the three-phase power element. If the phase current is greater than the first phase current value, a blocking weight value or an incomplete blocking weight value is calculated based on the phase current magnitude. A blocking target temperature value or an incomplete blocking target temperature value is also calculated based on the phase current magnitude. Finally, it detects the temperature of the motor driver. If the temperature is greater than the blocking target temperature value or the incomplete blocking target temperature value, it determines whether the blocking weight value or the incomplete blocking weight value exceeds the accumulated weight value. If so, it shuts off a power supply to the motor driver to protect the power element and ensures that the electric vehicle will not mistakenly stop operation due to excessive current when encountering a slope.

A power supply adjustment method, applicable to a processor and a power supply controller, includes: obtaining the processor's operating current; obtaining target power supply parameters from a pre-stored multi-segment load line based on the operating current; and controlling the power supply controller to provide power to the processor based on the target power supply parameters. The pre-stored multi-segment load line indicates the relationship between multiple preset currents and multiple preset power supply parameters, and includes multiple line segments corresponding to different current ranges and having different slopes. A power supply adjustment device with a multi-segment load line, applicable to a processor and a power supply controller, includes a reading line and a control circuit. A motherboard with a multi-segment load line includes a power supply controller and a processor.

An amplifier system comprising: a push-pull power amplifier having an input for receiving a radio frequency (RF) input signal and an output, the push-pull power amplifier configured to amplify the RF input signal and provide an RF output signal at the output, the RF output signal being an amplified version of the RF input signal; a switchable bypass capacitance switchably connected between a load line of the output of the push-pull power amplifier and a reference potential; and a switch configured to selectively connect and disconnect the switchable bypass capacitance to and from the reference potential to vary an impedance of the load line.

The application discloses a kind of fault detection method, device, air conditioner and storage medium of air conditioner, the method includes: from the power supply wire end of indoor load mainboard in indoor controller, whether there is fault arc in the entire load circuit of air conditioner is detected, obtain first detection result;And, from the power supply line between filter and outdoor load mainboard in outdoor controller, whether there is fault arc in the outdoor load circuit of air conditioner is detected, obtain second detection result;Based on first detection result and second detection result, in combination with indoor environment temperature, outdoor environment temperature, the temperature of electric appliance box of indoor controller, and the temperature of electric appliance box of outdoor controller, determine the fault point of air conditioner, disconnect load and initiate prompt message.The scheme, by sampling the voltage high-frequency signal of indoor and outdoor machine power line, in combination with the voltage high-frequency signal of indoor and outdoor machine power line and the temperature data of indoor and outdoor machine, the fault of air conditioner is detected and positioned, improve the reliability and safety of air conditioner work.

The application discloses a kind of based on dynamic load line's radio frequency device SOA extraction method and system, comprising: S101, output preset bias voltage and certain bias current to radio frequency device;S102, at the output end of radio frequency device, first impedance is set to make the dynamic load line of the output end of radio frequency device close to vertical state;S103, increase the input power of radio frequency device to make the swing of dynamic load line in vertical direction increase, obtain the swing upper limit that makes radio frequency device burn out, as SOA boundary point;S104, repeat S101-S103, obtain the SOA boundary point under all preset bias voltage;S105, all SOA boundary points are connected, and the SOA curve of radio frequency device is obtained.The application uses radio frequency test method, dynamic load line shape is controlled by impedance, and under different bias voltage, by increasing input power, device appears burnout, and the SOA curve of radio frequency device under real working state is obtained.

The invention discloses a low-voltage photovoltaic grid-connected voltage regulation method based on voltage loss optimization calculation, relates to the field of photovoltaic power control, and aims to overcome the limitations of insufficient data support, topology static state, rough loss calculation and the like in the prior art. After encryption, isolated transmission to an edge node is carried out; the method comprises the following steps: preprocessing data, calculating photovoltaic and load power, and constructing a coupling model containing parameters such as a dynamic load and a line adjustment length to correct a power grid topology; carrying out split-phase iterative calculation on segmented voltage loss containing multiple factors, superposition coupling and temperature additional loss to obtain total loss; calculating a dynamic threshold by combining the time period and the load fluctuation, and judging whether to adjust or not; and the transformer tap and the inverter reactive compensation cooperative adjustment are started. According to the invention, reliable data, topological adaptation, accurate calculation and intelligent adjustment are realized, the voltage regulation and control precision and stability are improved, and the high-permeability photovoltaic grid-connected power supply requirement is met.

A power supply adjustment method, applicable for a processor (A1,42) and a power supply controller (A2,41), includes: obtaining (S1) working current of the processor (A1,42), obtaining (S3) a target power parameter from a pre-stored multi-segment load line according to the working current, and controlling (S5) the power supply controller (A2,41) to supply power to the processor (Al,42) according to the target power parameter. The pre-stored multi-segment load line indicate the relationship between a plurality of preset currents and a plurality of preset power parameters, and includes a plurality of segments corresponding to different current ranges and having different slopes. A power supply adjustment device (1) with multi-segment load line, applicable to a processor (Al) and a power supply controller (A2), includes a reading wire (11) and a control circuit (12,22,32). A motherboard (4) with multi-segment load line includes a power supply controller (41) and a processor (42).

A device may receive a radio-frequency (RF) signal at a multi-mode power amplifier. A device may generate a load line for a first mode and a second mode based on the RF signal. A device may determine whether the load line is outside a first target zone for the first mode. A device may in response to determining that the load line is outside the first target zone, generating a first penalty value. A device may adjust inductance or capacitance values at the multi-mode power amplifier in response to the first penalty value.

The invention provides an inverter control method for adaptively adjusting a control period based on load characteristics, and the method comprises the following steps: analyzing the waveform similarity and impedance characteristics of an inverter according to an obtained voltage signal and an obtained current signal; identifying the load linear state of the current inverter, and obtaining the load characteristic parameters of the inverter; acquiring a frequency instruction and an amplitude instruction of the currently output reference sine wave; establishing a multi-objective optimization model based on harmonic error and switching loss equalization; performing feature extraction on the load characteristic parameter, the frequency instruction and the amplitude instruction; solving model characteristics through a multi-objective optimization model, and dynamically calculating an optimal control period under a current real-time working condition; and dynamically adjusting the control period of the inverter according to the optimal control period, and driving the inverter. By sensing the load characteristics in real time and dynamically adjusting the control period, the inverter can be automatically switched to the current optimal working mode under various working conditions.

The invention provides a switch driving circuit with a current limiting function, which relates to the technical field of electronics and comprises a driving signal input unit, a grid control unit, a power MOS (Metal Oxide Semiconductor) tube, a current acquisition unit and a comparison feedback unit. Wherein the current acquisition unit is connected in series with the power tube current path; the comparison feedback unit compares the sampling voltage with the reference voltage and dynamically adjusts the control voltage applied to the grid electrode of the power tube based on the comparison result, so that a negative feedback control loop is formed. According to the invention, the current limiting function is integrated in the driving circuit, the conduction current of the power tube is constant at an accurate value set by the internal resistance of the circuit and the reference voltage through closed-loop control, and the influence of external power supply voltage fluctuation and load line parasitic resistance change on the current is eliminated. The circuit does not need to be externally connected with an independent current limiting module, is simple in structure, is low in cost, is precise and reliable in current control, and is especially suitable for solid-state relays, ignition driving devices and other occasions needing stable high-power switch control.

The invention relates to the technical field of energy, in particular to an optical storage system control method, device and equipment and a program product. The method comprises the following steps: acquiring a real-time load power value of the optical storage system; if the real-time load power value is larger than the instantaneous power threshold value, a super capacitor is activated for buffer compensation, and the super capacitor is connected with an inverter in the optical storage system in parallel; if the real-time load power value is larger than the continuous power threshold value and the continuous duration is larger than the duration threshold value, overload protection of the load line is started, and the continuous duration is the continuous duration maintained when the real-time load power value is larger than the continuous power threshold value. According to the invention, the instantaneous power fluctuation and continuous overload of the optical storage system can be accurately identified, the overload protection misoperation probability is reduced, and the reliability of the optical storage system is improved.

The invention provides a testing system which can be applied to the technical field of testing. The test system comprises a to-be-tested board card which comprises a signal probe, a to-be-tested voltage regulator and a signal link for connecting the signal probe and the voltage regulator; a test device includes: a load circuit connected to a voltage regulator via a load cable; wherein the voltage drop at the two ends of the load cable is greater than the voltage drop at the two ends of the signal link, and the periphery of the load cable is surrounded by a cooling layer; the controller is connected to the signal probe and the load circuit and is used for acquiring an output parameter signal of the voltage regulator through a signal link; based on the output parameter signal, controlling a load circuit to output a corresponding test signal through a load cable so as to carry out a load test on the voltage regulator; wherein the output parameter signal is used for indicating at least one of the output voltage or the output current of the voltage regulator.

The utility model relates to the technical field of isolating switches, and discloses an anti-corrosion outdoor high-voltage alternating-current isolating switch, which comprises a base, two insulators are fixed on the base, shoulders are fixed on the insulators, a power supply wire board and a load wire board are respectively fixed on the shoulders at the tops of the two insulators through bolts, and the load wire board is fixed on the power supply wire board. A power supply contact is fixed on the power supply wire board, a load contact is fixed on the load wire board, a knife switch is rotatably arranged on the load contact, two semicircular lantern rings are fixed at the bottom of the convex shoulder through bolts, a case is fixed on the semicircular lantern rings, a case cover is rotatably arranged on the case, a handle is fixed on the case cover, and a handle is fixed on the handle. The side face of the machine box is provided with a shutter opening. According to the anti-corrosion outdoor high-voltage alternating-current isolating switch, closing and electrification can be achieved by rotating the knife switch, the isolating switch can be prevented from being exposed outside through the case, and meanwhile waterproof and dustproof treatment can be conducted on the isolating switch so that the isolating switch can be prevented from being corroded by rainwater or dust.

The invention discloses a measurement and calibration method and system for an LCC direct current transmission project turn-off angle. The measurement and calibration method comprises the steps that the electrical quantity of a primary circuit of a direct current transmission system is collected; calculating the transformation ratio of the transformer, the effective value of leakage reactance of the inverter station converter transformer valve side and the effective value of no-load line voltage based on the electrical quantity, and obtaining the calculated value of the inverter station pole-to-ground DC voltage; the calculated value is compared with the measured value, and steady-state checking of the direct-current voltage to the ground is completed; calculating a power factor of the inverter station based on the electrical quantity, and obtaining a reactive power calculation value according to the power factor and an active power real side value; comparing the calculated value with the measured value to complete the checking of the consumed reactive power; the method comprises the following steps: acquiring the time of an inverter station from valve turn-off to a zero crossing point when the voltage on the valve is changed from negative to positive, converting the time into an angle, acquiring an actual value of a turn-off angle, and comparing the actual value with a measured value to complete checking of the turn-off angle of the inverter station. When deviation exists in the turn-off angle, compensation is carried out, and the direct current operation characteristic is improved.