134 results about "Voltage shift" patented technology

The invention relates to the technical field of power systems, and discloses a management and control system for effectively managing and controlling distributed power supply loads based on power grid automation equipment. The system comprises an acquisition module for acquiring dynamic load parameters of a distributed power supply and topological information of a target power grid; the division module extracts load sudden change characteristics and divides the power grid into coordinated regulation and control partitions in combination with topological information; the injection module injects a preset disturbance signal to a time delay sensitive area node in the partition to obtain voltage offset distribution; the positioning module is used for positioning electrical weak nodes according to the oscillation attenuation rate of the electrical nodes and topological connection distribution; a verification module performs gridding ratio verification on the weak nodes and the coordination regulation and control partition to obtain a dynamic boundary constraint condition; an output module reconstructs a distributed power supply power output priority instruction based on the condition. According to the invention, the problems of lagging response and insufficient precision of power grid management and control under large-scale access of the distributed power supply are solved.

Methods, systems, and apparatuses include receiving, by a memory subsystem, a read command from a host device to read data from a memory portion of the memory subsystem. It is determined that the memory portion includes a partial block. A memory bin is determined for the memory portion in response to determining that the memory portion includes the partial block. A position is determined for the memory portion. A voltage offset is applied to a read voltage for the memory portion using the memory bin and the position.

The invention discloses an active power distribution network resource optimization method and system based on operation state perception, and relates to the technical field of resource optimization, and the method comprises the steps: determining a node set in an operation monitoring state, and obtaining the voltage deviation characteristics of each node in a continuous time window and the current fluctuation characteristics of a connected line; generating core regulation and control equipment and adjustable operation intervals and constraint conditions thereof based on the node-line state characteristics, and forming alternative self-healing regulation and control strategies; the node state change and the equipment resource occupation condition after the alternative self-healing regulation and control strategy is triggered are obtained, and an equipment resource load change curve is formed; extracting a resource occupation fluctuation index and accumulated resource consumption, and generating a resource consumption data set; and optimizing the self-healing operation sequence based on the resource consumption data set, generating an equipment resource optimization scheme, and executing the self-healing operation in sequence, thereby realizing dynamic resource optimization configuration of the active power distribution network, and improving the utilization efficiency of equipment and the self-healing capability of the system.

Receivers, control systems, and methods for receiving a signal. The method includes receiving a differential communication signal comprising a first component and a second component. The method also includes generating a comparison signal with a comparator by comparing the first and second components. Furthermore, the method includes generating an unbalanced communication signal by applying a debounce time to the comparison signal. Finally, the method includes inverting a voltage offset of the comparator based on the unbalanced communication signal.

This invention relates to the field of power electronics technology, specifically to a method and system for monitoring the insulation of DC charging piles. The method includes the following steps: real-time monitoring of branch voltage deviation from the busbar; adjusting measurement compensation parameters; correcting the measured value of branch insulation resistance; identifying leakage current drift; locating the leakage branch and triggering relay control; sending alarm information; and generating a charging pile monitoring record. In this invention, the consistency of branch voltage measurement is improved by combining branch voltage deviation trends with voltage compensation parameters. Observational errors are corrected by comparing insulation resistance fluctuations, optimizing measurement accuracy. Current deviation compensation under no-load conditions eliminates sensor zero-point drift interference. Leakage branch identification is achieved by combining current jump amplitude and voltage direction, enhancing location accuracy. Relay control and event information linkage are used to form a closed loop between alarm response and equipment status recording, improving the real-time performance and completeness of system monitoring.

Embodiments of a compensation circuit for a power amplifier (PA) and a method of PA compensation are disclosed. In an embodiment, a compensation circuit for a power amplifier (PA) includes an envelope detector configured to measure an input power of the PA and a bias offset generator configured to apply a voltage offset in response to the input power of the PA to generate bias voltages that are applied to back gates of transistor devices of the PA for distortion compensation and second harmonic (HD2) compensation of the PA.

This application provides a converter circuit and a control method for the converter circuit. The converter circuit provided in this application includes a converter module and a control module. The control module is used to detect the voltage parameters of the converter module and determine the voltage deviation based on the voltage parameters; determine the current zero-sequence component coefficient based on the voltage deviation; and determine the modulation waveform based on the current zero-sequence component coefficient, so as to drive the converter module using the modulation waveform. The converter circuit of this application associates the current zero-sequence component coefficient with the voltage parameters. When voltage changes are caused by system startup, shutdown, load abrupt changes, etc., only the current zero-sequence component coefficient is adjusted to quickly and smoothly switch between SVPWM and DPWM under these conditions, improving system switching efficiency and dynamic response capability.

The present disclosure relates to inductor current shunt linear control techniques for mitigating DC-DC regulator load dump transients. For inductor-based DC-DC converters, a current shunt switch can provide a backup path for inductor current that does not include the output capacitor. An amplifier circuit can be included and coupled with a control node of the current shunt switch to adjust a voltage on the control node to control the amount of inductor current shunted from the output node. A fast linear loop can be included to ensure smooth transitions when turning on or off the current shunt switch. These techniques can minimize the subsequent negative output voltage excursion and duration when the final value of a step-down load transient is not zero, depending on the specific ESL and ESR values of the output voltage capacitor. These techniques can improve the positive output voltage response caused by output load transients in the negative direction.

The application provides a power converter, a controller, a power supply system and a midpoint voltage deviation control method, which are applied to the technical field of power electronics, and the power converter comprises a power conversion module, a main control module and at least two DC bus capacitors, each DC bus capacitor is connected in series between the positive electrode of a DC bus and the negative electrode of the DC bus, and since the midpoint voltage deviation suppression strategy in the related art can only achieve good midpoint deviation suppression effect when the bus voltage is high, the main control module increases the bus voltage when the voltage deviation between the capacitance voltage of at least one DC bus capacitor and the target capacitance voltage is greater than the first preset deviation threshold, thereby providing guarantee for the midpoint voltage deviation suppression strategy to achieve better midpoint deviation suppression effect, improving the midpoint deviation suppression effect and significantly improving the stability of the power supply system.

The invention relates to an intrinsic temperature measurement for cross-temperature handling in a memory device. A system includes a memory device; and a processing device operably coupled with the memory device to perform operations including: measuring a read temperature metric associated with a segment of the memory device; estimating a read temperature based on the read temperature metric; determining a cross-over temperature value based on the read temperature and the write temperature; determining a set of crossover temperature voltage offsets associated with the crossover temperature values; and associating the set of cross temperature voltage offsets with the segment of the memory device.

The invention relates to the technical field of intelligent energy storage, in particular to an intelligent energy storage system based on source-grid-load storage integration, which comprises a power supply state evaluation module, a power grid constraint judgment module, an energy storage adaptation capability calculation module, a collaborative scheduling strategy matching module and an instruction execution consistency verification module. According to the method, the predictability of new energy output is enhanced by analyzing the wind power and photovoltaic power change rate in real time and extracting the average output of a stable interval as a reference, and a safe scheduling path is screened based on the power grid node load and voltage offset condition, so that scheduling failure caused by node overrun is avoided; according to the method, participating objects are accurately screened in combination with the charge state, temperature and discharge capacity of an energy storage unit, a clear scheduling capacity boundary is constructed, the response efficiency is improved, the energy storage capacity and a load gap are matched and judged, dynamic strategy adaptation under multiple scenes is achieved, the actual response and instruction consistency of a converter is verified, and it is guaranteed that a closed loop is accurately executed.

A non-volatile memory is capable of suspending a programming process before completion to perform a read (or other) process. When resuming the suspended programming process, a magnitude of a next program voltage pulse is set to be a voltage magnitude of a previous program voltage pulse plus a nominal increment adjusted by a voltage offset in response to the programming process being suspended for greater than a first time period. The magnitude of the next program voltage pulse is set to be the voltage magnitude of the previous program voltage pulse plus the nominal increment in response to the programming process being suspended for less than the first time period. The voltage offset and the first time period are set based on usage of the non-volatile memory (e.g., based on number of program-erase cycles performed).

This invention discloses a multi-objective optimization method for flexible distribution systems based on reward decoupling normalization reinforcement learning. This method constructs a multi-objective deep reinforcement learning model based on group reward decoupling normalization strategy optimization to perform multi-objective optimization scheduling for complex constraints in flexible distribution systems, such as renewable energy fluctuations, load changes, and scheduling resource coordination. The method designs the three objectives—minimizing operating costs, minimizing voltage offset, and minimizing photovoltaic curtailment—as independent reward functions, guiding the flexible distribution system's operation strategy to focus on multiple dimensions, including economy, environmental friendliness, and safety. The group reward decoupling normalization strategy optimization algorithm independently normalizes each reward, avoiding the collapse problem of multiple reward signals in advantage estimation and effectively preserving the relative differences between the objectives.

The invention discloses a transmitter and a driving compensation circuit and method. The driving compensation circuit comprises a common-mode conversion module used for obtaining a detection signal representing bus common-mode voltage offset; and the current generation module is used for generating compensation current according to the detection signal and performing current compensation on at least one of a positive differential signal and a negative differential signal of the differential signals, so that the symmetry of the positive differential signal and the negative differential signal is recovered when the bus common-mode voltage deviates. Based on the compensation mechanism, the transient jitter and direct current offset of the bus common-mode voltage can be effectively suppressed, and the electromagnetic compatibility (EMC) performance and the anti-interference capability of the differential communication system are improved.

A system includes a memory device comprising multiple dies and a processing device coupled to the memory device. The processing device causes a health scan to be performed on a block family of the multiple dies. The processing device updates, for each read sample taken during the health scan, an assignment to a voltage offset bin of a plurality of voltage offset bins. The processing device provides the updated assignments to the plurality of voltage offset bins to a machine learning trigger rate (TR) model. The processing device receives, from the machine learning TR model, a code word error rate (CWER) distribution of the memory device. In response to determining that a TR margin value associated with the CWER distribution does not satisfy a threshold value, the processing device causes a data associated with the block family to be refreshed.

The invention discloses a PMOLED voltage compensation method based on big data, relates to the technical field of voltage compensation, is used for solving the problem that compensation voltage is disorderly accumulated and amplified in the long-term operation process, and calculates the pixel brightness decay rate by collecting driving voltage data and brightness data of display pixels in a preset evaluation period. Voltage mismatched pixels are screened in combination with the driving voltage deviation condition, the lightening duty ratio and position information of the voltage mismatched pixels are collected, pixel aging areas are divided on the basis of the use intensity consistency and the spatial neighborhood aggregation relation, a historical database is further accessed, the historical compensation times of all the pixel aging areas are counted, and the compensation retention coefficient is calculated; compensation behavior intensity and compensation effect stability are quantified, a historical compensation coefficient and a compensation retention coefficient are fused to generate a mismatch correction coefficient, and the driving voltage compensation amount is corrected in combination with a voltage compensation reference, so that the stability, controllability and long-term display consistency of a voltage compensation process are improved.

The invention discloses a power distribution network dynamic voltage regulation and power optimization system based on wind power photovoltaic access, and relates to the field of power distribution network control, and the system comprises a sensing module which is used for sensing multi-source heterogeneous signals of wind power photovoltaic output, power distribution network node voltage and load power in real time; the fusion module is used for receiving the operation sensing signals of the sensing module and carrying out space-time dimension fusion processing on the signals so as to extract coupling characteristics of wind power photovoltaic output volatility, load change trend and voltage deviation and generate a standardized fusion data set; according to the invention, by capturing and optimizing wind power photovoltaic output, voltage and load related signals in real time, multi-factor coupling characteristics are mined accurately, the voltage offset risk and the voltage regulation demand are effectively pre-judged, and new energy consumption maximization, power distribution equalization and regulation and control cost minimization are realized through collaborative optimization.

A memory sub-system having a memory device with a plurality of cells and a processing device operatively coupled to the memory device, the processing device to perform the operations of: responsive to detecting a power off event, programming, to a predefined logical state, a dummy subset of the plurality of cells; responsive to detecting a power-up event, determining a voltage shift associated with the dummy subset of the plurality of cells; and identifying, based on the voltage shift, a voltage offset bin shift corresponding to a voltage offset bin associated with a specified subset of the plurality of cells.

This application relates to voltage bin calibration based on a voltage distribution reference voltage. A current memory access voltage distribution is measured for a memory page of a block family associated with a first voltage bin of a plurality of voltage bins at a memory device. The first voltage bin is associated with a first voltage offset. A current value of a reference voltage is determined based on the current memory access voltage distribution measured for the memory page. A voltage shift amount for the memory page is determined based on the current value of the reference voltage and a previous value of the reference voltage. The previous value of the reference voltage is associated with a previous memory access voltage distribution of the memory page. In response to determining that the voltage shift amount satisfies a voltage shift criterion, the block family is associated with a second voltage bin of the plurality of voltage bins. The second voltage bin is associated with a second voltage offset.

The utility model discloses a voltage displacement driving circuit, which completes real-time driving from input to output under the condition of different input and output voltage polarities, satisfies driving conversion from signals generated from a positive voltage domain to output to a negative voltage domain in some applications, and comprises an input amplification circuit, a phase inverter and an output conversion circuit, the input amplification circuit is connected with the phase inverter and the output conversion circuit, and the phase inverter is connected with the output conversion circuit; the output conversion circuit comprises a signal amplification circuit, a positive feedback circuit and an output driving circuit, the signal amplification circuit is respectively connected with the input amplification circuit, the phase inverter, the positive feedback circuit and the output driving circuit, and the positive feedback circuit is connected with the output driving circuit.

The invention provides a voltage lag simulation method and device, a battery simulation method and device and a storage medium, and the voltage lag simulation method comprises the steps: S31, obtaining the actual measurement data of a lithium removal voltage Eex and a lithiation voltage Ein; s32, setting a correction voltage E, an average voltage Eavg, an offset voltage Eoffset and a correction coefficient sigma, and establishing a correction model E (sigma); s33, introducing a lithiation state x and time t, setting identification parameters including a lag boundary alpha, a lag constant K and a critical coefficient epsilon, and establishing a dynamic equation sigma (x, t) about a correction coefficient sigma; and S34, simultaneously establishing a function E (sigma) and a function sigma (x, t), setting an initial value for the identification parameter, solving simulation discrete data (Esim, x, t) by comparing the actually measured voltage discrete data (Etest, x, t), defining an error index d (Esim, Etest), fitting the identification parameter by using an optimization algorithm, and solving the identification parameter. And a dynamic correction coefficient sigma is introduced to establish a voltage lag accurate correction model, so that high-precision mathematical description of the unbalanced behavior of the battery is realized, and the accuracy of a simulation result is improved.

The application provides a voltage control method and device for a black start recovery process, and relates to the technical field of power system safety defense. The method comprises the following steps: in the black start recovery process, every interval of a first recovery period, a global objective function is established and solved to obtain node voltage planning values and reactive power output planning values of each regional subsystem, with the aim of minimizing network loss in each regional subsystem; every interval of a second recovery period, based on the node voltage planning values and the reactive power output planning values, a middle-layer objective function is established and solved to obtain terminal voltage adjustment values and reactive power output adjustment values of each local station, with the aim of minimizing node voltage offset and reactive power output deviation of the local station; and every interval of a third recovery period, the reactive power equipment in each local station is controlled to operate according to the terminal voltage adjustment values and the reactive power output adjustment values. The application can accurately control the voltage and the reactive power output in the black start recovery process, and ensure the safety of the black start recovery process.

A digital-to-analog converter (DAC) and an operation method thereof are provided. The DAC includes a first operational amplifier (OPA), a second OPA, a resistor circuit, first switches, second switches, a first voltage shift circuit and a second voltage shift circuit. The first OPA outputs a first operating voltage. The second OPA outputs a second operating voltage. First terminals of the first switches receive the first operating voltage. First terminals of the second switches receive the second operating voltage. Second terminals of the first switches and the second switches are coupled to the resistor circuit. The first switches and the second switches perform switching operations in response to digital values. The first voltage shift circuit provides a first compensation voltage to the first OPA. The second voltage shift circuit provides a second compensation voltage to the second OPA.

For each voltage offset bin of a plurality of voltage offset bins, a corresponding period of scan operations of memory blocks associated with the voltage offset bin is determined. For each voltage offset bin of the plurality of voltage offset bins, a corresponding scheduling time offset of scan operations is determined. For a chosen voltage offset bin, based on a period of scan operations associated with the chosen voltage offset bin and a scheduling time offset associated with the chosen voltage offset bin, a scan operation is scheduled. The scan operation with respect to one or more blocks associated with the chosen voltage offset bin is performed.

This application relates to the field of power system technology, specifically to a reactive power compensation intelligent control method and system based on power generation. The method includes: acquiring voltage and current signals of edge nodes in the distribution network; extracting node voltage offset and reactive power of the edge nodes based on the voltage and current signals; controlling a bidirectional reactive power regulation device to perform preliminary regulation of the edge nodes based on the joint determination result of node voltage offset and reactive power; and recording the regulation indicators of the preliminary regulation. Based on the node voltage offset and regulation indicators after preliminary regulation, determining whether the preliminary regulation meets the standards. If it does not meet the standards, the cause of non-compliance is located based on the node voltage offset and regulation indicators after preliminary regulation, and closed-loop secondary regulation is performed; the causes of non-compliance include uncorrected voltage offset, reactive power regulation parameter deviation, and slow response speed. This application has the advantages of strong real-time regulation, high reactive power compensation accuracy, and outstanding node voltage regulation capability.

The invention discloses a partial energy storage embedded medium-voltage optical storage integrated control method and device and a medium, and relates to the technical field of distributed control, and the method comprises the steps: calculating a health state index, associating a current charge state in an operation feature set, and generating a dynamic role distribution table; according to the three-phase voltage in the operation characteristic set, determining a voltage offset condition, when voltage offset exists, assigning a dominant decision component to cooperate with an auxiliary response component according to a dynamic role allocation table, determining a reactive power allocation share through distributed communication negotiation, and forming a reactive power instruction group; and issuing the reactive power instruction group to an energy storage assembly for execution, simultaneously obtaining an actual voltage value of the medium-voltage interconnection point after execution, performing effect verification on the actual voltage value of the medium-voltage interconnection point, and determining whether to start updating of the dynamic role allocation table according to a verification conclusion. According to the invention, real-time role optimization configuration of the energy storage unit is realized through dynamic role allocation and a self-adaptive updating mechanism.

This invention relates to the field of relay control technology. Specifically, it relates to a digital delay-activated relay control method. The method includes the following steps: S1, acquiring relay parameter information, extracting the operating voltage range corresponding to relay activation based on the parameter information, and temporarily taking the lowest value within the operating voltage range as the standard operating voltage. This invention achieves adaptive compensation of delay time under the coupling of multiple factors such as ambient temperature, humidity, atmospheric pressure, electromagnetic interference intensity, and power supply load current by constructing a two-dimensional offset matrix that correlates multi-dimensional environmental parameters with historical deviation time. Simultaneously, it dynamically updates and calibrates the standard operating voltage by combining grid voltage offset and line voltage drop, effectively solving the problem that traditional fixed-delay control methods cannot adapt to changes in operating conditions, significantly improving the accuracy of timing control, and ensuring the synchronous operation of multiple devices and the stable operation of the power system.

The invention discloses a device for improving bus common-mode voltage offset of a CAN (Controller Area Network) transceiver and the CAN transceiver. The device comprises a main driving module, a common-mode clamping module and a slope control module, the common mode clamping module and the slope control module are connected between the CAN high side CANH and the CAN low side CANL; the output end of the common-mode clamping module is connected with common-mode feedback nodes of the CANH and the CANL; the main driving module is used for generating a slope control signal according to a set time sequence control logic; the common-mode clamping module is used for generating common-mode clamping voltage at common-mode feedback nodes of the CANH and the CANL; and the slope control module is used for generating bias current based on the common-mode clamping voltage after the slope control enable signal is enabled, and generating a discharge current path which flows from the CANH and the CANL to the circuit operational amplifier node and is controllable in size based on the bias current and the slope control signal. By using the scheme of the invention, the EMC characteristic of the CAN transceiver can be optimized, and the common mode stability and the system robustness can be ensured.

The invention provides an insulation hidden danger-to-fault evolution dual-identification device, which comprises a plurality of acquisition boards used for acquiring direct current leakage current and zero sequence current signals of a sensor; the plurality of pulse voltage excitation plates are used for providing pulse voltage excitation for the sensor; the power panel is used for being connected with an external power supply and collecting zero-sequence voltage in the system; the back plate is used as a connection hub among all the acquisition plates, the pulse voltage excitation plate and the power supply plate; the interior of the device is divided into two independent bins by the metal isolation plate; the sensor is respectively connected with the acquisition board and the pulse voltage excitation board; calculating branch insulation resistance based on the ratio of the direct current leakage current to the superposed direct current voltage; an alarm is triggered through zero-sequence current abrupt change and zero-sequence voltage offset, and a single-phase earth fault is identified. According to the invention, direct current leakage current, zero-sequence current and zero-sequence voltage are synchronously acquired through the multi-coil multi-magnetic-core sensor, and real-time double identification of an insulation state and a grounding fault is realized by combining pulse voltage excitation and dynamic voltage regulation.