615results about "Voltage measurements only" patented technology

The invention relates to the technical field of electricity metering anomaly monitoring, and provides a distributed resource access-oriented lightweight electricity metering anomaly monitoring method, which comprises the following steps of: acquiring electrical data and environment associated data of distributed access points at an edge side, and constructing a fluctuation fingerprint feature vector; when it is detected that the fluctuation fingerprint feature vector meets a preset fluctuation triggering condition, based on Pearson correlation analysis between the electrical data and the environment associated data, performing decoupling and elimination on false anomalies caused by environmental factors to obtain a fluctuation fingerprint feature vector of non-environmental suspicious anomalies; based on historical normal operation data, constructing a normal working condition mode library by adopting a clustering analysis method, and determining a feature center and a dynamic safety radius of each normal working condition mode; and calculating the feature distance between the non-environmental suspicious abnormal fluctuation fingerprint feature vector and each normal working condition feature center at the edge side, and judging whether the electricity consumption metering is abnormal or not according to the relationship between the feature distance and the dynamic safety radius.

Method for estimating the voltage value relating to a live element uses five capacitors, wherein a first capacitor has its first pole connected to said live element; a second capacitor has its first pole connected to said live element; a third capacitor has its first pole connected to the second pole of the first capacitor and its second pole connected to ground; a fourth capacitor has its first pole connected to the second pole of the second capacitor and its second pole connected to the first pole of a fifth capacitor. The voltage value is estimated using: 1) a voltage value relating to a first node positioned along the conducting wire that connects the first capacitor to the third capacitor 2) a voltage value relating to a second node positioned along the conducting wire that connects the fourth capacitor to the fifth capacitor; 3) a capacitance value of the third capacitor; 4) a capacitance value of the fourth capacitor; 5) a capacitance value of the fifth capacitor.

The invention discloses a spacing-adjustable magnetic steel wire electricity-taking clamp, and aims to solve the problems of poor stability, difficult installation of an electricity-taking clamp and poor adaptability in the adsorption electricity-taking process of an existing magnetic steel wire. The electricity taking clamp comprises a clamping assembly, an adjusting assembly, a fixing assembly and a plurality of magnetic steel wires, the clamping assembly is connected with the adjusting assembly, and the fixing assembly is connected with the clamping assembly; the adjusting assembly is used for adjusting the clamping width of the clamping assembly, the clamping assembly abuts against the circuit breaker, the fixing assembly is matched with the clamping assembly to fix the multiple magnetic steel wires, and the multiple magnetic steel wires are electrically connected with the circuit breaker. The electricity taking clamp can be adapted to circuit breakers with different widths, so that the universality of the electricity taking clamp is improved, and the cost is reduced; the adaptation process during power taking of the circuit breaker is saved, the power taking operation time is shortened, and the power taking efficiency is improved. The matching efficiency of the magnetic steel wire and the screw hole of the circuit breaker is improved, the wiring operation is simplified, the clamping assembly abuts against the circuit breaker, the stability of the power taking clamp after installation is ensured, and continuous power supply is guaranteed.

The invention discloses a power distribution network cluster local control method and device, equipment and a medium. The method adopts a cloud edge end three-level collaborative architecture, and comprises the following steps: acquiring electrical parameters through a terminal equipment layer; constructing a graph model based on an electrical distance at the edge calculation layer; performing initial cluster division and issuing on the cloud computing layer; dynamically optimizing cluster division in an edge calculation layer through a lightweight deep reinforcement learning model; local control strategies such as voltage reactive power cooperative control, frequency active power balance control and fault rapid isolation and self-healing are executed based on the final division. The system comprises a terminal device layer, an edge computing layer and a cloud computing layer. According to the method, decoupling of global optimization and local real-time control is realized through cloud-side cooperation, the problems of high data processing pressure, high communication delay, expanded local fault influence range and the like of centralized control are effectively solved, and the real-time performance, reliability and disaster resistance of the power distribution network are remarkably improved.

The application discloses a kind of non-contact track frequency shift signal online monitoring method and system, applied to intelligent monitoring technical field, method includes: receiving first measured voltage and second measured voltage;First measured voltage and second measured voltage are input first conditioning circuit by first transmission line, receive the first output voltage output by first conditioning circuit, and the parallel transmission line formed after first measured voltage and second measured voltage are connected in parallel by second transmission line and third transmission line are input second conditioning circuit, receive the second output voltage output by second conditioning circuit;According to first output voltage and second output voltage, calculate first measured voltage.The application is realized by the way of double-path simultaneous monitoring, reduces the influence of the related capacitance value change caused by environmental conditions on monitoring result, to effectively improve monitoring precision, and then provides solid foundation for non-contact frequency shift signal back-end processing.

A vehicle smart energy center includes an array of electronic fuses coupling a DC power bus to a plurality of loads and primary and supplemental electrical power sources. Electronic fuses self-diagnose health and report current, voltage and temperature data which is used by a smart energy center control module to manage the diagnostic, current, voltage and temperature data and electronic fuses for fault remediation whereby the vehicle remains operable through various smart energy center anomalies.

The invention discloses a differential non-intrusive voltage measurement method based on a charge simulation method, and relates to the technical field of voltage sensor measurement, and the method comprises the steps: obtaining the distance from a plurality of sensors to a simulation line charge; wherein every two sensors form a double-layer differential structure; the simulated line charge is located in the center of the wire; based on each double-layer differential structure, determining a corresponding field-source decoupling relational expression; based on an electromagnetic formula, obtaining a relational expression between the wire surface voltage and the simulated line charge in the single power transmission line model; determining a single line voltage inversion expression based on the field-source decoupling relational expression and the relational expression of the wire surface voltage and the simulated line charge in the single power transmission line model; determining the number of single-line voltage inversion equations based on the single-line voltage inversion expressions and the number of sensors; and based on a plurality of single-line voltage inversion equations, calculating to obtain a voltage solution with the minimum overall error. According to the invention, the overall anti-interference performance of voltage inversion can be improved.

The invention discloses an intelligent vibrating rod system and an intelligent vibrating process, and relates to the technical field of concrete vibrating. The system comprises a vibrating rod, a motor and a control module, the control module comprises a motor control unit, a motor monitoring unit, a suspension voltage detection unit and an identification and analysis unit; the suspension voltage detection unit is connected with the shell of the vibrating rod and is used for detecting the suspension voltage of the shell; the motor monitoring unit is used for monitoring an input electric signal of the motor; the identification and analysis unit is connected with the suspension voltage detection unit and the motor monitoring unit, and is used for judging the working stage and the node of the vibrating rod according to the change and the change trend of the suspension voltage and the input electric signal; and the identification and analysis unit is used for outputting a control instruction to the motor control unit according to the identified working stage and node. According to the method, the traditional vibrating operation depending on artificial experience is converted into a traceable, normative and controllable operation process, and the uniformity and reliability of the concrete vibrating quality are effectively guaranteed.

The embodiment of the invention discloses a ripple component extraction method, a ripple signal suppression method, a ripple component extraction device and power equipment, and the method comprises the steps: inputting a target bus voltage signal and an instantaneous angular frequency into an SOGI filter for processing, enabling the SOGI filter to output an instantaneous in-phase component and an instantaneous quadrature component, and controlling a PI controller to extract a ripple signal based on an instantaneous feedback quantity, and performing closed-loop control on the instantaneous angular frequency, and when the instantaneous angular frequency converges to the target angular frequency, outputting an instantaneous in-phase component of the target angular frequency by the SOGI filter. The ripple component is extracted in a software mode, no hardware circuit needs to be additionally arranged, the size miniaturization of the energy storage system is facilitated, and the hardware cost is reduced. The instantaneous feedback quantity provides the tracking direction and size of the real angular frequency of the ripple component for the PI controller, so that the instantaneous angular frequency output by the PI controller is accurately and reliably converged to the target angular frequency, and the extraction of the ripple component to be solved is adaptively completed.

The invention relates to the technical field of automobile voltage, and discloses a voltage dynamic monitoring control method and system for an automobile speed regulation module and a storage medium, and the method comprises the steps: carrying out the covariant analysis of a real-time voltage sequence and a demand parameter sequence, and obtaining an expected voltage fluctuation and an abnormal voltage fluctuation; when the amplitude and the change rate of the expected voltage fluctuation are increased, the upper threshold and the lower threshold of the reference voltage safety line are correspondingly enlarged, and a dynamic voltage safety line is obtained; performing correlation analysis on the grade of the heat dissipation load signal, the priority of the instant load scheduling signal and the severity of the abnormal voltage fluctuation to obtain an electric power operation situation index; constructing a virtual voltage track by taking the electric power operation situation index as a node and combining the change trend of the abnormal voltage fluctuation; when the virtual voltage track approaches or passes through the dynamic voltage safety line, a prospective compensation instruction is generated, an optimal compensation strategy is generated, and abnormal voltage fluctuation is inhibited; according to the invention, the efficiency of voltage dynamic monitoring control of the automobile speed regulation module can be improved.

The invention relates to the technical field of power fault detection, and mainly relates to a residual voltage detection circuit and a line protection device.The residual voltage detection circuit comprises a sampling circuit and a signal holding circuit, the signal holding circuit adopts double coils and comprises a first coil and a second coil, and a loop where the first coil is located is provided with a first controllable switch tube in series; the first controllable switch tube is connected when the sampling circuit collects residual voltage, a second controllable switch tube is arranged in a loop where the second coil is located in series, the control end of the second controllable switch tube is used for being connected with a feeder terminal, and the signal holding circuit further comprises a residual voltage output branch used for being connected with the feeder terminal. The residual voltage output branch is provided with a first contact of the double coils in series. A sampling circuit is used for obtaining a residual voltage signal generated at the moment of closing of a faulty power grid line, and a signal holding circuit formed by double coils is used for transmitting a sampling signal to a feeder terminal, so that the feeder terminal can still receive the residual voltage signal when the feeder terminal loses power after power supply is recovered.

An apparatus for detecting a deterioration of a rapid charging terminal includes one or more processors and a storage medium storing a computer-readable instruction, wherein, when the computer-readable instruction is executed by the one or more processors, the one or more processors are configured to measure an inter-terminal voltage due to a contact resistance between rapid charging terminals respectively provided in an inlet and an outlet, while rapid charging is performed, and determine whether the rapid charging terminal is deteriorated based on the measured inter-terminal voltage, and wherein the voltage is measured using a terminal not used for rapid charging among the terminals provided in the inlet and the outlet.

The invention discloses an automobile engine multi-sensor fault diagnosis system and method, and particularly relates to the technical field of engine multi-sensor fault diagnosis, the automobile engine multi-sensor fault diagnosis system comprises a plurality of sensors, a diagnosis module and a calibration module, the plurality of sensors collect engine operation data and cover air inlet pressure sensors, boost pressure sensors and the like; the diagnosis module diagnoses sensor faults according to preset enabling conditions and logic description, wherein the sensor faults comprise various types of power supply short circuit, ground short circuit and the like; the calibration module sets calibration parameters and verifies and adjusts the parameters in three-high tests and daily calibration. The system and the method can comprehensively diagnose sensor faults, improve diagnosis accuracy and reliability, adapt to different working condition environments, guarantee normal operation of an engine, improve driving experience and stability of an automobile electrical system, and have remarkable practical value.

Provided in the present invention are a temperature effect calibration circuit and method for voltage measurement, and a battery management system and a vehicle. The temperature effect calibration circuit for voltage measurement comprises: a temperature measurement module, which performs measurement and outputs a temperature measurement signal; a sampling module, which samples a voltage to be measured; a reference voltage generation module, which generates a reference voltage; a quantization module, which converts into a digital signal an analog signal output by the sampling module; a compensation parameter calculation module, which performs quadratic fitting and calculation to obtain compensation parameters; and a temperature effect correction module, which corrects an output signal of the quantization module at a current temperature to obtain a corrected voltage measurement signal. In the present invention, there is no need to add a complex circuit design to an analog circuit domain, and thus the design is easier to implement; the requirement for a temperature coefficient of a device in the process is reduced, and thus the technical solution can be applied to various different process nodes; and calibration is performed at a digital backend, and only one instance of full-temperature-range scanning is required during the factory testing of a chip, without spending a large amount of time on a high / low-temperature test, thereby effectively reducing costs.

The invention relates to the technical field of grid-connected control of a power system, and discloses an island detection and self-synchronizing grid-connected method for an offshore floating power generation device, which is used for solving the problem that transient oscillation is difficult to effectively suppress in a self-synchronizing grid-connected process after island detection in a traditional method. According to the method, firstly, voltage and frequency signals are collected at a grid-connected interface, and accurate island identification is achieved in combination with multi-cycle deviation judgment and a self-adaptive threshold value; a virtual synchronous machine mode is switched after the island is confirmed, and transient power fluctuation and phase difference are utilized to set damping and perform voltage closed-loop calibration, so that the device is converged to be aligned with the phase and voltage of the power grid; after an alignment condition is met, gradual power injection is adopted to complete grid connection, voltage, frequency and power balance is verified and monitored through a parameter period, and graded adjustment or back-off is carried out when necessary, so that transient oscillation and power impact are suppressed in the whole process from island detection to grid connection again and stable operation, and grid connection stability and adaptability are improved.

The invention discloses a non-contact track frequency shift signal on-line monitoring method and system, and is applied to the technical field of intelligent monitoring, and the method comprises the steps: receiving a first measured voltage and a second measured voltage; a first measured voltage and a second measured voltage are input into a first conditioning circuit through a first transmission line to receive a first output voltage output by the first conditioning circuit; the first measured voltage and the second measured voltage are connected in parallel through a second transmission line and a third transmission line to form a parallel transmission line, and the parallel transmission line is input into the second conditioning circuit to receive a second output voltage output by the second conditioning circuit; and calculating a first measured voltage according to the first output voltage and the second output voltage. According to the non-contact frequency shift signal monitoring system, the influence of the change of the capacitance value of the related capacitor caused by the environmental condition on the monitoring result is reduced in a double-path simultaneous monitoring mode, so that the monitoring precision is effectively improved, and a solid basis is provided for the back-end processing of the non-contact frequency shift signal.

The invention discloses a power supply voltage monitoring device system based on edge calculation, and the system comprises a data collection and preprocessing module which is used for collecting and preprocessing voltage data, and generating a voltage time sequence data sample; the edge clustering analysis module is used for carrying out adaptive fuzzy C-means clustering and bald eagle search optimization to obtain a clustering center and a membership matrix; the state classification and abnormity identification module is used for carrying out state classification on the voltage data of each monitoring point and generating an abnormity identification mark; the alarm and linkage control module is used for automatically triggering local alarm, power failure or power limiting measures for abnormal monitoring points; the communication and data uploading module is used for uploading the abnormal data and the alarm information to a remote management platform; and the visualization and operation and maintenance management module is used for visually displaying abnormal information, archiving historical data and assisting operation and maintenance management. Intelligent monitoring, abnormity identification and quick response of the power supply voltage are realized, and the safety and reliability of a power grid are improved.

The invention relates to the technical field of power distribution system control, in particular to a transformer area voltage compensation control method and system considering distributed power supply fluctuation. Constructing an electric energy quality influence coefficient of each grid-connected point in each time period according to the three-phase voltage and a difference condition among positive-sequence, negative-sequence and zero-sequence components obtained by three-phase voltage decomposition, and calculating a comprehensive disturbance coefficient of a low-voltage transformer area in each time period by combining voltage difference and voltage change trend synchronism among different grid-connected points; the distribution difference and the coupling influence relation between the grid-connected points are comprehensively considered, and the influence characteristics of the fluctuation of the distributed power supply can be evaluated more accurately; the gain coefficient in the sliding mode controller is optimized based on the obtained comprehensive disturbance coefficient, and the adjusted controller is adopted to carry out transformer area voltage compensation control, so that the defect that the transformer area voltage compensation precision and reliability are insufficient can be overcome.

This suppresses power waste caused by discharging residual charge. [Solution] The emitter 10 of the distance measuring device 1 for measuring the distance to an object comprises a transmitting unit that outputs a transmission wave to irradiate the object, a capacitor 120 that is charged by a power supply and supplies current to the transmitting unit, a switching element 150 that controls the current flowing to the transmitting unit, a drive circuit that controls the switching element, and a control unit 180 that, after irradiating with a transmission wave, sends a control signal to the drive circuit to continuously irradiate with a transmission wave of an irradiable distance according to the residual charge of the capacitor 120.

An apparatus for diagnosing a surge protector connected to a battery includes a first switch configured to open and close a line that connects the first line to the second line by being directly connected to one end of each of the first line and the second line, a second switch configured to open and close a line that connects the second line to the third line by being directly connected to one end of each of the second line and the third line, and a processor configured to control opening / closing operations of the first switch and the second switch, measure a diagnostic voltage applied to the diagnostic resistor according to the opening / closing operation of the first switch and the second switch, and diagnose the surge protector based on the diagnostic voltage. A corresponding method and non-transitory computer-readable medium are also disclosed.

A meter (1) comprising a phase conductor (10) connected to a phase line of a network, a disconnecting member (12) and a detection circuit, comprising: an injection chain (15) arranged to generate a test signal (St) having a predetermined voltage level when the disconnecting member is open, and arranged to inject the test signal into the phase conductor downstream of the disconnecting member; a measurement chain (16) arranged to measure an intermediate voltage level of the test signal at a measurement point (Pm) of the injection chain, the point being located between the generator assembly and the injection assembly; a processor assembly (17) arranged to act on the intermediate voltage level in order to determine whether the circuit breaker is open or closed.

The application provides a kind of intelligent secondary voltage line selection device, it is installed in PT interface screen, and all voltage control circuits in measurement group and metering group are connected, also with each connected voltage control circuit on air switch are connected, including voltage acquisition module, outlet module and CPU module;Voltage acquisition module real-time acquisition all voltage control circuit on secondary voltage and upload;CPU module according to the secondary voltage of all voltage control circuit, determine the abnormality of petroleum voltage control circuit, if there is, then each abnormal voltage control circuit and its fault phase conversion control instruction is issued to outlet module;Outlet module according to control instruction, to each abnormal voltage control circuit on air switch are controlled, to shut off each abnormal voltage control circuit on fault phase output voltage.It can improve the scientific rationality of voltage control circuit access and use to avoid the protection misoperation caused by non-protection voltage accident and cause large area power failure.

The application relates to a voltage measuring device and method of a three-phase common tank GIS device, which comprises a basin type insulator, an induction cylinder and a collection board card, the induction cylinder is composed of a metal inner wall and a metal outer wall fixed by a structure support, the induction cylinder is fixed in a hole of the basin type insulator, the collection board card is connected with the metal inner wall and the metal outer wall of the induction cylinder respectively, and the collection board card is used for reducing the voltage of the three-phase common tank GIS device. The technical scheme provided by the application omits the high-voltage capacitor, the medium-voltage capacitor and the intermediate transformer in the traditional capacitor voltage division mutual inductor, and has no ferromagnetic resonance problem; the influence of the coupling capacitor between the phase-to-phase conductive rods on the phase measurement is eliminated, independent measurement of three phases is realized; the influence of the induction capacitor formed by the metal inner wall and the metal outer wall and the induction capacitor formed by the metal outer wall and the ground on the circuit is eliminated, and the accuracy of the measuring device is ensured by adjusting the variable resistor on the collection board card.

A method for detecting a variation of input voltage. The method is generating an indication signal based on the input voltage, and comparing the input voltage with a first reference signal. The first reference signal is smaller than the indication signal, and if the input voltage is consistently smaller than the first reference signal during a first time duration from the moment when the input voltage is decreased to the first reference signal, the indication signal is decreased after the first time duration.

The semiconductor device includes: an insulating layer provided on a semiconductor substrate; a first resistor embedded in the insulating layer and electrically connected to a node on a first potential side; a second resistor embedded in the insulating layer; a third resistor embedded in the insulating layer; and a reference electrode electrically connected to a node on a second potential side of the third resistor. An absolute value of the first potential is greater than an absolute value of the second potential. The first resistor, the second resistor, and the third resistor are connected in series. The first resistor is formed by connecting N resistors in parallel, the second resistor is formed by connecting M resistors in parallel, and the third resistor is formed by connecting L resistors in parallel, with N<L and M<L satisfied.

A metallic island is disposed between a first metallic bus and a second metallic bus. The first metallic strip is isolated from the metallic island by a first dielectric barrier. At least a parallel portion of the first metallic strip is generally parallel to the first metallic bus, the second metallic strip isolated from the second metallic bus by a second dielectric barrier. Each first semiconductor terminals that are coupled to the first metallic bus and to the metallic island. Each second semiconductor has terminals coupled to the metallic island and to the second metallic bus.

The invention relates to the technical field of chip testing, and discloses a circuit, method, device and system for measuring the voltage of a chip pin, and the circuit comprises a relay circuit which can be in a first state or a second state through a control signal; when the relay circuit is in the first state, the chip pin is directly connected with the ATE test channel through the relay circuit; the voltage division circuit is provided with a test end, a sampling end and a reference end; and when the relay circuit is in the second state, the test end is connected with the chip pin through the relay circuit, the sampling end is connected with the ATE test channel through the relay circuit, and the reference end is connected with the reference voltage. And when the relay circuit is in the second state, the voltage of the sampling end can be adjusted to a measurable range of the ATE test channel through the voltage division circuit and the reference voltage, so that the high voltage and the negative voltage exceeding the measuring range at the chip pin can be obtained through calculation.

An electric power conversion apparatus includes: an electric power input terminal; an electric power output terminal; an electric power conversion circuit; a sensor circuit generating a detection voltage corresponding to a voltage at the electric power output terminal; a control circuit operable based on a first power supply voltage, including an input terminal to receive the detection voltage, and controlling operation of the electric power conversion circuit; and a power supply circuit generating the first power supply voltage and a second power supply voltage. The sensor circuit includes: resistors provided in a path coupling the electric power output terminal to a reference node, the resistors being coupled in series via first and second intermediate nodes, the second intermediate node being coupled to the input terminal; and a first diode including an anode coupled to the first intermediate node, and a cathode to be supplied with the second power supply voltage.

This invention relates to the field of fuel cell technology, specifically to a method, processing method, and system for predicting low voltage in a fuel cell cell. The prediction method includes: S1, starting up the fuel cell stack; S2, applying current while simultaneously applying AC excitation; S3, acquiring cell voltage data and calculating the current average cell voltage V. avg With the lowest single-chip voltage V min And the standard deviation σ of the current single-chip voltage; S4, determine |V avg -V min If the equation |≤3σ| holds true, the fuel cell stack is considered to be in good health and there is no single-cell low-voltage fault. If the equation does not hold true, the fuel cell stack is considered to have a single-cell low-voltage fault. This invention also provides a method for handling low-voltage single cells in a fuel cell and a fuel cell system. Compared with existing technologies, by using normal distribution theory to identify the number of cells potentially prone to low voltage before the single-cell voltage drops below the shutdown limit and implementing intervention and recovery measures, the failure rate is significantly reduced, thereby improving the stability and reliability of the fuel cell system.