117 results about "Power measure" patented technology

The invention relates to the technical field of new energy power system control, and relates to a power decoupling method for cooperative control of voltage feed-forward compensation and adaptive virtual impedance. The method comprises the following steps: acquiring a power grid current and a power grid voltage, and calculating a reactive power measured value and an active power measured value of a power grid; virtual synchronous machine control is carried out, and a voltage feed-forward pre-compensation item is introduced into a reactive power control loop; calculating a reactive power control loop after VSG compensation, and obtaining VSG output side voltage and instantaneous angular frequency; self-adaptive virtual impedance control is adopted, a self-adaptive virtual impedance reference value is calculated, line impedance is dynamically adjusted, and a voltage loop input instruction voltage is calculated according to the line impedance; and adjusting the output performance of the inverter according to the instruction voltage. According to the invention, the problem of power fluctuation caused by VSG output voltage amplitude variation is effectively solved, and the dynamic influence of a power coupling item is weakened.

The invention relates to an intelligent testing device for a repeating high-power intermediate relay, which comprises a programmable direct-current excitation power supply module for providing starting voltage for the intermediate relay, and is characterized in that the intermediate relay is respectively connected with a high-precision power measurement module and a high-speed action time acquisition module; the high-precision power measurement module and the high-speed action time acquisition module are both connected with the intelligent criterion analysis module, and the intelligent criterion analysis module is connected with the man-machine interaction and communication module. The intelligent testing device for the intermediate relay is compact in structure, convenient to use and accurate in measurement, has intelligent analysis capability, supports various relay brands and models, is compatible with a 220V / 110V system, has good universality and expansibility, can be widely applied to occasions such as acceptance inspection, field maintenance and troubleshooting of a relay protection device, and has wide application prospects. Therefore, the reliability and safety of the operation of the power equipment are improved.

The invention provides a negative sequence voltage control method and a negative sequence voltage control system for a network-constructed converter, and relates to the technical field of network-constructed converter control. Calculating negative-sequence reactive power absorbed by the converter and the maximum negative-sequence reactive power which can be absorbed by the converter under the specified fault working condition, and comparing the negative-sequence reactive power and the maximum negative-sequence reactive power to obtain a negative-sequence active power instruction and a negative-sequence reactive power instruction; performing droop control by using the negative sequence active power instruction; pI control is carried out by using a negative sequence reactive power instruction; when a fault occurs, performing three-phase voltage and current sequence decomposition to obtain a negative sequence voltage amplitude and phase and a negative sequence current amplitude and phase of the converter; and performing power measurement according to the amplitude and phase of the negative-sequence voltage output by the converter and the amplitude and phase of the negative-sequence current to obtain negative-sequence active power and reactive power transmitted between the converter and the power grid.

The invention provides a distribution line fault positioning precision self-correction method based on a digital twin model, and the method comprises the steps: independently constructing a virtual branch of a parallel admittance structure for each phase for each measurement point node of the digital twin model, and initializing the admittance vectors of all virtual branches; obtaining a three-phase current measured value of the distribution line, a three-phase voltage amplitude measured value and a power measured value of each measuring point node, and a corresponding power theoretical value in the digital twinborn model; obtaining a residual vector between the power measured value and the power theoretical value; assigning a division result of the residual vector and the voltage amplitude square matrix to an admittance vector; and acquiring the virtual power of each virtual branch according to the admittance vector, and correcting the admittance parameter of the distribution line in the digital twinborn model according to the current measured value. According to the method, the digital twin model can continuously and automatically track parameter changes of a physical system through a closed-loop correction mechanism, and the precision and reliability of fault positioning based on the model are ensured.

In various embodiments, a computer-implemented method includes determining a size of a display area of a display panel on which one or more images are being displayed, determining a threshold current value based on the size, measuring a first current drawn by the display panel, determining whether the first current exceeds the threshold current value, and upon determining that the first current exceeds the threshold current value, causing a second current providing power to a light source associated with the display panel to be shut off.

The invention relates to a method for determining the AC linear electrical resistance of a steel pipe, comprising the steps of generating an induced current in a portion (4) of the pipe by means of an induction coil (6) centered on a longitudinal axis (XX) of the pipe and traversed by an alternating current, the coil being housed in a ferromagnetic cylinder head (8) to confine the magnetic field over a predefined surface of the pipe portion, measuring the active power dissipated by the pipe portion subjected to the magnetic field, measuring the amplitude of the produced magnetic field, and determining the AC linear electrical resistance of the pipe portion from the measurements of the dissipated active power and the amplitude of the induced magnetic field. The invention also relates to a device (2) for implementing said method.

To provide a method, system, and apparatus for transitioning power.SOLUTION: The power transfer device may be configured to fit securely into a fuse block, fuse holder, and / or the like. Power transfer devices may transfer power from a source to a load, such as connected to a fuse block and / or fuse holder, while also isolating power to prevent power from being fed back to the source. Power transfer devices may be used to perform tests, measurements, and / or analyses (e.g., voltage measurements, power measurements, frequency analyses, system impedance tests, etc.).SELECTED DRAWING: Figure 1A

The invention discloses a quiet zone performance verification method and device, equipment, a storage medium and a program product. The quiet zone performance verification method comprises: acquiring M * N sets of power measurement data obtained by a standard component in a quiet zone at M positions corresponding to N measurement elements, each set of power measurement data comprising K power values, the N measurement elements comprising at least one measurement element deployed in a non-horizontal plane, and M, N and K being positive integers (310); calculating statistical results respectively corresponding to the M * N groups of power measurement data (320); and determining a ripple performance evaluation result of the quiet zone according to statistical results respectively corresponding to the M * N groups of measurement data (330). By means of the method, for an MIMO OTA system with multiple incoming wave directions, evaluation and verification of the ripple performance of the quiet zone can be comprehensively and effectively achieved.

The application relates to a light shielding device and a power measurement system. The light shielding device comprises: a plurality of light shielding mechanisms, the projections of the plurality of light shielding mechanisms along a first direction are connected in sequence, the projection of the light shielding mechanism along the first direction is located on a to-be-tested mechanism, and the light shielding mechanism is used for shielding the to-be-tested mechanism; and a detection hole, the plurality of light shielding mechanisms surround and construct the detection hole, and the detection hole is used for exposing an active area of the to-be-tested mechanism along the first direction; wherein the positions between two adjacent light shielding mechanisms are adjustable, so as to change the size of the detection hole. Through the technical scheme provided in the application, the problems of complicated operation and low applicability of the light shielding device in the related art can be solved.

The application provides a kind of launch assembly operating state monitoring device, it relates to launch assembly operating state monitoring technical field, including voltage measurement circuit, current measurement circuit, power measurement circuit, operational amplifier circuit, analog-digital conversion circuit, digital input circuit, digital output circuit, communication circuit and processor circuit, each circuit has electrical connection between each other.The application can realize the analog quantity collection of power voltage, power amplifier module working current and radio frequency signal power of launch assembly, power supply undervoltage and overvoltage, overtemperature and the state monitoring of input and output radio frequency signal power, emergency stop, development of receiving gate sleeve signal, gate sleeve output and the control of indication signal, and the communication transceiver with outside, more comprehensively realizes the monitoring and reporting of launch assembly operating state and protection and fault diagnosis function.

An electric power measurement circuit includes: a period measurement circuit that measures a measurement period; a first measurer that measures (i) a first toggle number that is a number by which a signal value indicated by an input signal to a first target circuit has changed and (ii) a first operation period that is a period during which the input signal is valid; a second measurer that measures (i) a second toggle number that is a number by which a signal value indicated by an output signal from the first target circuit has changed and (ii) a second operation period that is a period during which the output signal is valid; and a calculator that calculates the first power consumption of the first target circuit based on the measured first toggle number, the measured first operation period, the measured second toggle number, and the measured second operation period.

To provide a frequency converter for satellite broadcast reception, and a power measurement system provided with the frequency converter, for performing frequency conversion for a satellite broadcasting signal obtained through a satellite broadcast reception antenna.SOLUTION: A frequency converter 1 for satellite broadcast reception according to the invention includes: an interference wave reception antenna 11 having receiving gain in a predetermined image frequency band; channel under interference selection means (an interference wave detection part 12 and a frequency determination part 13 / 13a) for identifying a channel under interference in a satellite broadcasting signal from a reception signal obtained through the interference wave reception antenna 11; frequency conversion means for channel under interference (a second frequency conversion part 17 and a bandpass filter 18) for generating a second intermediate frequency signal regarding the channel under interference by performing frequency conversion for the signal of the channel under interference; and output means (a mixer 21 or the like) for transmitting a signal based on the second intermediate frequency signal regarding the channel under interference to a predetermined home distribution system with one coaxial cable.SELECTED DRAWING: Figure 1

The utility model relates to the field of power meters, and provides a pointer type short-wave power meter, which comprises an input detection circuit, a gear switching circuit, a meter head linear correction circuit, a reference voltage circuit, a power supply circuit and a pointer module, an input radio frequency signal is processed through the input detection circuit, multi-gear processing is carried out on a detected direct current signal through the gear switching circuit, nonlinearity of the detected signal is processed through the gauge head linear correction circuit, the finally output signal directly pushes the pointer module, and the pointer module displays power reading. Therefore, accurate power measurement in an electromagnetic interference environment is realized.

The invention discloses a low-voltage distribution network state estimation-oriented low-voltage topology tracking method, which comprises the following steps of: acquiring standing book information of a target station area integrated power distribution information system, three-phase voltage and power measurement information of a public assessment ammeter on the secondary side of a distribution transformer, and voltage and power measurement information of a single-phase ammeter user; a multi-target 0-1 variable optimization problem considering minimum power balance and maximum voltage correlation is respectively constructed by three-phase voltage and power measurement information of three-phase electric meter users, a linear weighting method is adopted to integrate into a single-target optimization problem, and a branch and bound technology is adopted to solve so as to identify phases to which the electric meter users belong. And based on the user-phase-change identification result, the transformer area archive information is corrected, and accurate and complete low-voltage topological information is provided for subsequent state estimation and fine management of the distribution network.

The invention is suitable for the technical field of communication, and particularly relates to a chip power tolerance robustness detection method and system and a storage medium. According to the invention, the insertion loss of the first power measurement unit and the insertion loss of the second power measurement unit are calibrated; calculating a first gain value of the chip to be measured according to the first measurement value and the second measurement value; stopping transmitting the input signal to the power amplifier, and recording a second quiescent current of the current second power supply; comparing the first quiescent current with the second quiescent current; calculating a second gain value of the chip to be measured according to the third measurement value and the fourth measurement value; and comparing the first gain value with the second gain value, and judging whether the first comparison value or the second comparison value exceeds a preset comparison value: if so, taking the third measurement value as the tolerance limit value of the chip to be tested. Compared with the prior art, the tolerance of the to-be-detected chip can be accurately detected and evaluated, so that the chip is prevented from being damaged due to the fact that a high-power signal is received.

A power measurement system, especially for a spindle or drive axes of a numerical machine tool, comprises a microcontroller (1), at least one analog-to-digital converter (2) connected to a current sensor (4), wherein the sensor (4) is connected for measurement purposes to an electric motor (5), especially one driving a spindle or drive axes of a numerical machine tool. The subject of the application is also a method of measuring power implemented using a power measurement system.

The application provides a power measurement device and method based on an analog quantum voltage source. The first standard voltage source in the power measurement device is an analog quantum voltage source and is used to generate a first standard quantum voltage in a sinusoidal waveform. The second standard voltage source is an alternating quantum voltage source and is used to output a second standard quantum voltage in a sinusoidal step wave. In the case where the other end of the switch is connected to the second standard voltage source, the processor adjusts the first standard quantum voltage based on the second standard quantum voltage. In the application, the standard quantum voltage of the alternating quantum voltage source is transmitted to the analog quantum voltage source. The pure sinusoidal wave signal of the analog quantum voltage is conducive to reducing the difference value of the power difference sampling, realizing continuous measurement, reducing the requirement for the stability of the power source, and realizing a double-pass analog quantum voltage source, and simplifying the differential measurement control of the voltage and the current in different phases.

The invention relates to the field of power electronics, in particular to a system and a method for measuring power loss of a magnetic element. The system comprises a power measuring unit, a power circuit and a to-be-measured magnetic element which are sequentially connected in series, and further comprises at least two auxiliary magnetic elements which are connected with the to-be-measured magnetic element in parallel, and the auxiliary magnetic elements and the to-be-measured magnetic element are the same in structure; and the control unit is connected with the at least two auxiliary magnetic elements and the power measurement unit, and is used for obtaining the power difference of the at least two auxiliary magnetic elements measured by the power measurement unit before and after the sequential access so as to obtain the power loss representing the magnetic element to be measured. According to the application, the auxiliary magnetic element with the same magnetic core loss as the magnetic element to be measured is constructed, the other loss, except the magnetic core loss, introduced by the auxiliary magnetic element can be neglected, and the power difference of the at least two auxiliary magnetic elements measured by the power measurement unit before and after the connection in sequence is acquired, so that the power loss representing the magnetic element to be measured is obtained.

Described herein are systems, methods, and other techniques for aligning a terminal in a satellite communication system. An indicator of a test slot is sent to the terminal to designate a specific frequency allocation for testing. The satellite obtains a set of multi-slot power measurements based on signals received, including a first signal transmitted by the terminal on the test slot. The measurements are transmitted by the satellite to a ground station in a second signal. A set of power measurements specifically for the test slot are extracted from the multi-slot power measurements. The extracted power measurements are transmitted by a gateway to the satellite in a third signal and then from the satellite to the terminal in a fourth signal. These power measurements are utilized by the terminal to perform pointing and cross polarization alignment and power adjustment.

A shaft power monitoring system based on wireless power supply and micro-strain measurement comprises a rotor, a stator, a wireless power supply system and a display end, the rotor part collects shafting strain signals through a strain gauge, and after signal conditioning and digital processing are completed through a microcontroller, non-contact transmission of data is achieved through a wireless transmitting module; meanwhile, electric energy required by operation is obtained through a wireless power supply receiving end and a rectifying circuit board; the stator part receives and analyzes data transmitted by the rotor through a wireless receiving module, and signal management and state monitoring are carried out by a microcontroller; meanwhile, a rotating speed measuring module arranged in the stator monitors the rotating speed of the shaft system in real time, and continuous and stable energy support is provided for the rotor through a direct-current power supply and a wireless power supply transmitting end. According to the invention, through combination of a high-precision micro-strain measurement technology, wireless power supply and wireless data transmission, technical difficulties of a traditional shaft power measurement system can be effectively solved.

The invention discloses a temperature compensation method and device for a thermistor power sensor, and the method comprises the steps: arranging a plurality of temperature sensing elements in the power sensor, and collecting the temperature data of the inner side of a power sensor housing, the inner side of a power flange seat, and the temperature data above a thermosensitive element protection barrel in real time; acquiring a compensation value of power drift caused by the environment temperature through the reference end of the power sensor; based on the temperature data of the plurality of temperature sensing elements and the reference end compensation value, the output power after temperature compensation is calculated by using the compensation model, a plurality of key positions are collected in real time, the output power after reference end compensation is compensated again by using the temperature value, the power error generated by the working end along with the temperature change is eliminated, and the accuracy of the power compensation is improved. The method can effectively counteract output power errors caused by insufficient technological level, and the stability of power measurement is remarkably improved.

The present invention relates to a substrate processing equipment, and more particularly, to a substrate processing equipment equipped with a current / voltage / power measurement module for measuring the current / voltage applied for generating and maintaining plasma during substrate processing using plasma, and further for measuring the power of incident and reflected waves. The present invention discloses a substrate processing equipment comprising a process chamber forming a sealed processing space in which plasma is formed to perform substrate processing; a substrate support unit disposed in the processing space on which a substrate is seated; and a gas injection unit for injecting a process gas into the processing space, wherein the substrate support unit includes a heater for heating the seated substrate, and a current / voltage / power measurement module for measuring an RF voltage, current, and power of an incident wave and a reflected wave generated by plasma in the processing space is installed adjacent to a heater power line for supplying power to the heater.

The present application provides a thermoelectric conversion module for calorimetric power measurement and a power measurement method, the thermoelectric conversion module for calorimetric power measurement comprising: a calorimetric body for absorbing power and converting the absorbed power into heat energy; the temperature measuring circuit is used for outputting a corresponding voltage value based on the heat energy, and the voltage value is used for determining the size of the power; the temperature measuring circuit comprises a bridge and three operational amplifiers; the electric bridge comprises a temperature measuring resistor, the temperature measuring resistor is in contact with the calorimetric body, and the resistance value of the temperature measuring resistor is correspondingly changed based on the magnitude of the heat energy; the bridge is used for outputting corresponding differential signals before and after calorimetric power measurement in response to the change of the resistance value of the temperature measurement resistor, and the three operational amplifiers are used for amplifying the differential signals so as to output the voltage value, so that the power measurement efficiency can be improved.

The invention discloses a power distribution network voltage control method and device, electronic equipment and a storage medium, and relates to the technical field of power grid operation, and the method comprises the steps: receiving first parameter information of a voltage control node and second parameter information of a distributed power supply node in a power distribution network; determining a power sensitivity parameter and a voltage offset of the voltage control node based on the first parameter information and the voltage measurement; determining a current dual variable value based on the voltage offset, the dual variable value of the previous control period and the first parameter information; obtaining the target offset of the current control period based on the power measurement value of the distributed power supply node, the second parameter information, the power sensitivity parameter and the current dual variable value; and obtaining a target output set value of the distributed power supply node based on the target offset of the current control period, and performing voltage control based on the target output set value. And when the voltage changes rapidly, voltage regulation can be realized more rapidly and accurately, and stable operation of the power distribution network is ensured.

The embodiment of the invention provides a power measurement system and method, and relates to the technical field of terminal equipment. According to the power measurement system provided by the embodiment of the invention, in the process of synchronously acquiring the current and the voltage, the condition of deviation of the acquired current caused by the characteristics of the voltage acquisition module can be avoided, and the accuracy of instantaneous power measurement is improved. The power measurement system comprises: a current acquisition module configured to: receive a first input voltage and a second input voltage; the voltage acquisition module is configured to pull down a first voltage corresponding to the first end of the first load so as to enable the first voltage to form a first input voltage, and a first voltage drop exists between the first input voltage and the first voltage; and the current compensation module is configured to pull down a second voltage corresponding to the second end of the first load so as to enable the second voltage to form a second input voltage, a second voltage drop exists between the second input voltage and the second voltage, and the first voltage drop is equal to the second voltage drop.

The present invention relates to a substrate processing equipment, and more particularly, to a substrate processing equipment equipped with a current / voltage / power measurement module for measuring the current / voltage applied for generating and maintaining plasma, and further for measuring the power of incident and reflected waves. The present invention discloses a substrate processing equipment comprising a process chamber, a substrate support unit, a gas injection unit, and at least one RF power source. The substrate support unit includes a heater and an RF energy blocking part installed above the heater. A current / voltage / power measurement module is installed adjacent to a grounding wire, which is connected to the RF energy blocking part, to measure the RF voltage, current, and power of an incident wave and a reflected wave generated by the plasma.

The invention provides a generator dynamic metering error compensation method and device, relates to the technical field of generator metering errors, and is used for improving the technical problem of insufficient metering error compensation effect in the dynamic operation process of a generator in related technologies and improving the metering accuracy under a dynamic working condition. The method comprises the steps of obtaining generator operation parameters at the current moment; acquiring an original power measurement value of the generator at the current moment; according to the obtained operation parameters of the generator, an operation state influence factor at the current moment is calculated, and the operation state influence factor is used for representing the influence of the operation state of the generator on the metering error; estimating the dynamic metering error at the current moment according to the operation state influence factor and the estimated dynamic metering error at the previous moment; and obtaining a compensation power measurement value at the current moment based on the original power measurement value and the dynamic metering error at the current moment.

The invention relates to the technical field of power grid control, and discloses a microgrid group coordination control method and system based on shared energy storage, and the method comprises the steps: obtaining a coordination control DC voltage value according to a DC side output voltage value of a first distributed power supply in the shared energy storage and a constant power distributed coordination control strategy; according to an active power measurement value of a second distributed power supply in the microgrid group and a distributed secondary frequency control strategy, obtaining a droop control frequency; according to a distributed peer-to-peer coordinated control strategy obtained by processing the coordinated control direct-current voltage value and the droop control frequency based on a finite time consistency algorithm, determining a direct-current side voltage variable quantity of each flexible interconnection converter, and according to a direct-current side bus rated voltage value and the direct-current side voltage variable quantity, obtaining a direct-current side voltage reference value; and converting the direct current side voltage reference value, and sending an obtained voltage control signal to the corresponding flexible interconnection converter. According to the method provided by the invention, the stability of the micro-grid group based on shared energy storage is effectively improved.