52 results about "Power margin" patented technology

The invention relates to a station domain control method and system and a storage medium. The station domain control method comprises the steps of data acquisition and state monitoring, wherein the information of electric power flow, vehicle charging state, power grid load and energy storage state of a charging station is mainly acquired; load prediction and electricity price analysis: predicting an ultra-short-term load change trend by adopting a time sequence model LSTM to predict a future load, judging a time period in which the electricity price is located, and judging which time period the current time is in, namely, a peak time period, a flat time period and a valley time period; transformer load evaluation: making a control strategy by calculating available power headroom; power optimization distribution is carried out, and power dynamic adjustment is carried out according to different conditions; a charging pile strategy and an energy storage strategy are adjusted according to the load condition and the electricity price condition; executing a charging and discharging control strategy; the real-time dynamic adjustment refers to periodical adjustment of a charging strategy; according to the invention, electric energy transmission and state monitoring in the charging station can be effectively managed, and the real-time performance, reliability and safety of vehicle network interaction are improved.

The invention provides a charging pile power adaptive regulation and control method and device, and relates to the technical field of power adaptive regulation and control. The method comprises the following steps: firstly, setting regulation and control points according to a preset time interval, collecting a station total incoming line available power upper limit, total active power and charging state data of each charging pile, and calculating a demand priority score of each charging pile based on a current battery charge state and a historical power distribution condition; generating a plurality of candidate strategies according to positive and negative total power margin, and respectively implementing differential power increase and decrease for high and low demand priority piles; according to the charging rate curve, simulating the total charging completion time of all the charging piles under each strategy, selecting the strategy with the shortest total time as a comprehensive optimal strategy, and determining the target distribution power of the next regulation and control point of each pile; and finally, smoothly issuing a power instruction to a power control unit of each pile through slope rate limitation. On the premise of guaranteeing the safety of the power grid, the overall charging efficiency and the user satisfaction degree of the station can be remarkably improved.

The invention provides a new energy transmission system new energy-storage cooperative support control method under multiple constraints of a voltage stability domain, and relates to the technical field of power system voltage stabilization. According to the method, a model of reactive power, grid-connected voltage, active power and system parameters is established based on a power flow equation, and a required reactive reference is calculated by combining a set voltage expected value and real-time output power; and under the constraints of the voltage ride-through threshold, the converter capacity, the short-circuit ratio and the power margin, executing a new-storage cooperative voltage support strategy. Under the working conditions of new energy fault ride-through, output power out-of-limit and the like, the voltage stability can be remarkably improved, the output capacity of a new energy station is enhanced, and safe and stable operation of the system is ensured.

The invention relates to the technical field of wireless communication, and discloses a design method for a broadband Mesh networking communication terminal radio frequency module, which comprises the following steps: designing the overall structure of the radio frequency module, and optimizing the design of a receiving link, a transmitting link and a transceiving logic control unit based on a radio frequency chip. The transmitting link adopts a preceding-stage, middle-stage and final-stage three-stage power amplification structure and is provided with graded power headroom, and the core is that the transmitting-receiving logic control unit takes a radio frequency chip as a core and synchronously controls the radio frequency switch of the receiving link and the amplifier bias of the transmitting link through an SPI (Serial Peripheral Interface) bus; the radio frequency module designed by the method is high in output power, low in noise, high in reliability and strong in anti-interference capability, can be used for realizing quick and reliable switching of transmitting and receiving states and frequency point selection of a frequency hopping filter, and is integrated with a circulator standing wave protection mechanism to effectively absorb reflection power and protect a power amplifier. The radio frequency module designed by the method is high in output power, low in noise, high in reliability and strong in anti-interference capability; the method is especially suitable for high-speed frequency hopping broadband Mesh ad hoc network communication terminals.

The invention provides a power headroom reporting method, terminal equipment, a storage medium and a program product. The method comprises the steps of determining a type 3 power headroom report (PHR) of a first sounding reference signal (SRS) according to a first parameter, and reporting the type 3 PHR of the first SRS. According to the method provided by the invention, the accuracy of reporting the PHR by the terminal in a heterogeneous transmission mode can be improved.

Embodiments of this application relate to the field of communications technologies, and in particular, to a method and an apparatus for reporting a power headroom report, and a method and an apparatus for obtaining a power headroom report, and may be applied to the internet of vehicles, for example, V2X, LTE-V, and V2V, or may be applied to fields such as D2D, smart driving, and intelligent connected vehicles, to more properly allocate a sidelink power and resource. The solution includes: A first terminal calculates at least one of a first power headroom report PHR and a second power headroom report PHR. The first PHR is a power headroom report of the first terminal on a first transmission link. The second PHR is a total power headroom report of the first terminal on the first transmission link and a second transmission link, the second transmission link is a wireless communication link between the first terminal and a network device, and frequency division multiplexing FDM is performed on a part of transmission resources on the first transmission link and a part of transmission resources on the second transmission link. The first terminal sends the at least one of the first PHR and the second PHR.

The invention relates to the technical field of energy storage system parallel control, and particularly discloses an optimization control method and system based on an energy storage inverter, and the method comprises the steps: building a phase cooperation matrix; constructing a weighted parallel network operator, analyzing the dynamic change of the maximum characteristic value based on a percolation phase change theory, and generating a percolation early warning signal in combination with an inversion probability coefficient; supercells are divided through a reformed group algorithm; solving a virtual impedance scale transformation coefficient fusing the maximum characteristic value of the super-cell and a power margin correction term, dynamically configuring the virtual impedance scale transformation coefficient, and injecting a chaotic disintegration signal to cut off long-range correlation; monitoring the percolation long-range correlation disintegration degree and the circulation entropy, and judging whether the system is stable or not; the system comprises a collaborative acquisition module, a phase change analysis module, an anchor point analysis module, a signal injection module and a stability analysis module. The method is beneficial for suppressing circulating current resonance and synchronous instability of multi-inverter parallel connection, and is suitable for a large-scale energy storage cluster grid-connected or off-grid operation scene.

This application discloses a wind power allocation control method, which includes: dividing a regional wind-storage system into domain-level control units and group-level control units, wherein each domain-level control unit contains at least one group-level control unit; constructing a power transmission cross-section based on the transmission line groups of all group-level control units within the domain-level control unit, and calculating the total power margin of the power transmission cross-section; allocating the total power margin to each group-level control unit under the domain-level control unit; and performing power compensation based on the energy storage power station to match the total output power of each group-level control unit with the allocated power margin. This method allocates the power margin to the "group," which can solve the problem that power dispatching is difficult to control every wind farm at the same time, thus improving the stability of the wind farm.

This invention proposes an adaptive droop control method for dynamically correcting DC voltage, comprising: establishing a mathematical model of the voltage source converter in a two-phase rotating coordinate system based on the physical model of the voltage source converter; calculating the available power margin and DC voltage variation of the converter station based on real-time measured active power and DC voltage; incorporating the real-time power margin and DC voltage deviation into the droop coefficient based on the traditional droop control strategy of the converter station, while optimizing the active power command value; and establishing an additional DC voltage stabilizer, which automatically adjusts the active power command value during power disturbances, thereby reducing the DC voltage variation, using the DC voltage variation as input. This invention rationally allocates the unbalanced power on the DC side and approximately achieves zero-error regulation of the DC voltage, effectively improving the stability of system operation. Simulation results show that this invention outperforms conventional droop control strategies and improved droop control strategies under different simulation conditions.

Certain aspects of the disclosure are directed to an apparatus for wireless communication. In some examples, the apparatus may be a user equipment (UE) configured to select a power headroom (PH) value associated with: a default PH configuration of the apparatus, a signal output for transmission to a first network node of a first serving cell of a first cell group, or the signal output for transmission to a second network node of the first serving cell of a first cell group. In some examples, the UE may output, for transmission to a second serving cell of a second cell group, a PH report comprising the selected PH value, wherein the PH report is output for transmission via a first slot.

The present application belongs to the technical field of production management informatization and resource operation and optimization, and relates to a kind of underground charging chamber resource dynamic scheduling management system and method, comprising: data acquisition unit gathers underground mobile equipment data and exports discrete feature matrix;Priority arbitration unit calculates energy consumption throughput deficit margin according to job plan and energy consumption constraint, and establishes time sequence emergency degree weight factor in combination with shift handover buffer time to output priority comparison result;Scheduling matrix generation unit brings total available power margin as reverse constraint condition into the path planning process of discrete feature matrix to establish flexible time slice allocation mechanism, according to priority comparison result, the time slice duty cycle of each charging channel and power allocation quota are constrained, and charging sequence and resource occupation scheduling table are output, the present application reconstructs flexible time slice allocation mechanism by optimizing scheduling management decision algorithm, and realizes fine collaborative configuration of production resources and equipment scheduling.

This application relates to the field of multi-terminal flexible DC transmission system equipment, specifically to a method and system for adaptive adjustment of droop coefficient in a multi-terminal flexible DC transmission system. The method includes: real-time monitoring and acquisition of local electrical quantities; inputting the electrical quantities as input variables to a main fuzzy logic controller; outputting an initial adjustment amount for the droop coefficient; inputting the absolute values ​​of the real-time power margin deviation and DC voltage deviation to the corresponding auxiliary fuzzy logic controllers to obtain a power margin weighting factor and a DC voltage weighting factor, which are then used to weight and correct the initial adjustment amount to obtain the droop coefficient adjustment amount; adding the droop coefficient adjustment amount to the initial droop coefficient to obtain the real-time droop coefficient; and performing amplitude limiting processing on the real-time droop coefficient to obtain the final real-time droop coefficient; applying the method to the droop controller of the corresponding converter station to complete the adaptive adjustment of the converter station's output characteristics, thus forming a hierarchical intelligent decision-making system.

The invention discloses a power interface converter stability control method for a power-steam cogeneration system, and the method comprises the following steps: collecting a hydrogen energy storage state, a cogeneration unit operation state and an electric quantity, and constructing a comprehensive feasible region containing thermoelectric coupling constraint and ramp rate limitation; mapping an original power instruction into the feasible region and performing slope shaping to obtain a target power reference value; calculating an available energy margin and a fast power margin based on a physical boundary, and dynamically and cooperatively scheduling inertia and damping parameters of the virtual synchronous machine according to the available energy margin and the fast power margin; realizing grid-connected and off-grid seamless switching in combination with current margin gating logic; according to the invention, the system stability and the electric energy quality under complex working conditions are effectively improved.

The invention relates to a direct-current sending power distribution strategy, which comprises the following steps of: constructing and calculating a direct-current channel power distribution margin index and a new energy power generation power proportion prediction value of a sending-receiving end power grid; constructing and calculating a new energy power generation proportion change index of the direct-current transmitting-receiving end power grid, and judging whether a flexible resource adding direct-current power margin allocation scheme under a load working condition needs to be started or not; and constructing a sending end direct current sending power distribution strategy. Based on new energy power generation proportion prediction and change trend analysis, direct current channel power distribution is dynamically optimized, new energy is preferentially added, flexible resources of a sending end and a receiving end are accurately called, space-time cooperative adjustment is achieved, the channel utilization rate and the new energy consumption rate are remarkably improved, and wind and light curtailment is effectively reduced; through quantification of direct current margin and adjustable resource linkage, system stability and economy are considered, responsibility sharing is clear, different new energy proportions and power grid structures are adapted, and the engineering generalization performance is high.

Embodiments of the present application provide a power compensation method of a distributed system, an electronic device and an apparatus, the method comprising: determining a transmission power margin of a first radio remote unit (RRU) after initial allocation; and performing transmission power compensation on a resource block (RB) scheduled by the first RRU based on the transmission power margin. By determining the transmission power margin of each RRU after initial allocation in units of RRU, and performing transmission power compensation on the RB scheduled by each RRU based on the transmission power margin, the power that cannot be utilized by the existing power control strategy on each RRU can be compensated to the scheduled RB, thereby improving the downlink transmission power utilization rate of the RRU and improving the performance of the scheduled UE.

The application discloses a new energy station bidirectional transient reactive power measurement optimization method, which firstly establishes a PQ rectangular coordinate system, then draws a maximum operation boundary in the PQ rectangular coordinate system, and then calculates reverse transient reactive power margins and forward transient reactive power margins of the measured and controlled station's transient reactive power generating elements, calculates an optimal area of a PQ point according to the reverse transient reactive power margins and the forward transient reactive power margins of the generating elements, and prewarns and optimally controls the present operation PQ point of the transient reactive power generating elements in the station through the optimal area. The application realizes the coordinated preventive control of the transient reactive power of the generating elements in the measured and controlled station, so that the new energy station has maximized bidirectional transient reactive power reserves in real time, ensures that the maximum reverse and forward transient reactive power can be provided to inhibit the voltage rise or drop during the state change, abnormality or fault process of the power grid, supports the voltage stability of the station, and no oscillation source occurs.

The invention provides an electric power spot market demand-based power plant operation strategy generation method and system. The method comprises the steps of obtaining real-time demand data and frequency modulation capacity demand data of an electric power spot market and real-time operation parameters of a power plant; determining a safe operation boundary parameter set of the power plant at the current moment according to the real-time operation parameters, wherein the safe operation boundary parameter set comprises a water leveling load upper limit, a water leveling load lower limit, an adjustable power margin and a water level safety margin; and according to the real-time demand data, the frequency modulation capacity demand data and the safe operation boundary parameter set of the electric power spot market, generating a hydro-generator automatic vibration area crossing strategy and / or a hydro-generator intelligent start-stop strategy. According to the technical scheme provided by the invention, dynamic boundaries such as water level safety and leveling water load are embedded in the decision process, so that safe, economical and automatic optimized operation of the power plant in a spot market environment is realized.

This disclosure relates to 5G or 6G communication systems for supporting higher data transmission rates. A method performed by a user equipment (UE) in a wireless communication system is provided. The method includes: receiving a radio resource control (RRC) reconfiguration message, the RRC reconfiguration message including information indicating whether to report a power headroom report (PHR) regarding a assumed physical uplink shared channel (PUSCH); identifying that at least one PHR is triggered; and transmitting a media access control-control element (MAC CE), the MAC CE including: at least one C i Field, at least one C i The field indicates the presence of the power margin PH field of the serving cell with serving cell index i, and at least one E k Field, at least one E k The field indicates the presence of the maximum power of the assumed PUSCH field for the kth serving cell among the serving cells in which its PH field exists, where the serving cells are indexed in ascending order of serving cell index i, starting with the primary cell (PCell) and then the other serving cells.

The invention discloses an automatic voltage control method, system and device for a new energy station and a medium. The method comprises the following steps: acquiring state data and grid-connected point voltage deviation of each reactive power source in the new energy station; when the grid-connected point voltage deviation is greater than a preset voltage threshold value, calculating a reactive compensation demand according to the grid-connected point voltage deviation; based on the state data of each reactive power source, distributing a reactive power compensation demand to each dynamic reactive power source so as to carry out voltage regulation; and after the voltage is stable, optimizing reactive power distribution of the dynamic reactive power source and the static reactive power source by taking maximization of the energy storage reactive power margin as a target. Through the two-stage hierarchical coordination strategy, the voltage stability and the operation efficiency of the new energy station can be improved, and rapid voltage regulation and reactive power resource optimal distribution are realized.

The invention discloses a stability control method, device and equipment of a power system, a medium and a product, and the method comprises the steps: monitoring the voltage fluctuation state of a main power grid in real time, and calculating the total reactive power support amount needed by the power system when the voltage is remarkably deviated; determining an adjustable reactive power margin of each power generation equipment cluster of the power distribution network through a piecewise linear interval mapping method; a reactive power distribution strategy is generated according to the total reactive power support amount, the adjustable reactive power margin and the distribution priority, the total reactive power support amount is dynamically distributed to each power generation equipment cluster of the power distribution network, and the power generation equipment clusters are driven to complete reactive power output adjustment; and acquiring a voltage recovery state fed back in real time, and dynamically optimizing a reactive power distribution strategy through a closed-loop control mechanism according to the difference between the voltage recovery state and a target voltage state. According to the invention, transient voltage stability control of the power system is realized based on a main and distribution network cooperation mechanism, and safe and stable operation of the power system is guaranteed.

The present invention discloses a method for suppressing subsequent commutation of a high-voltage direct current system, and discloses a device, a terminal and a storage medium having the method for suppressing subsequent commutation failure of a high-voltage direct current system. The method for suppressing subsequent commutation failure of a high-voltage direct current system includes screening effective side measurement data by setting voltage thresholds and parameter constraints, and realizing real-time estimation of the Thevenin equivalent parameters based on the least squares method to obtain the maximum DC operating power under the constraints of the AC system after the fault. According to the characteristic that the power change near the maximum power point is less sensitive to the current change, the DC current corresponding to the maximum power after retaining a certain power margin is determined as the current control upper limit for suppressing subsequent commutation failure. Finally, after PSCAD simulation verification, the proposed estimation method can quickly track the Thevenin equivalent parameters, and the DC current limiting measures obtained based on the parameters can effectively avoid subsequent commutation failures caused by reduced system strength.

The invention discloses a power flow symmetrical control method and system for a high-voltage flexible direct-current system, and belongs to the technical field of flexible direct-current transmission, and the method comprises the steps: collecting the direct-current voltage, line power and circuit breaker state signals of each converter station in a direct-current power grid in real time; establishing a mirror symmetry relationship between the available margin of the line power and actual power distribution, and constructing a system symmetric comprehensive index SMPFE for quantitatively evaluating the symmetry of power flow distribution; and on the basis of an SMPFE index, an optimal droop control parameter is solved by adopting an NBI method, and the variable quantity of an output voltage reference value of the converter station is dynamically adjusted, so that autonomous equilibrium distribution of power is realized. According to the method, a mirror symmetry control mechanism of power headroom-actual allocation is provided, power allocation is dynamically matched with the real-time bearing capacity of the current converter and the direct-current line by minimizing the SMPFE index, power out-of-limit is avoided, the method is suitable for application scenes with frequent power fluctuation such as offshore wind power, and safe and stable operation of a multi-terminal direct-current system is effectively guaranteed.

The present disclosure provides a method for reporting power headroom, device, terminal device, and network device. The method, performed by a terminal device, includes: triggering a power headroom report when a transmission path type changes; wherein the transmission path type comprises a direct path and / or an indirect path; the direct path is a transmission path for direct communication between the terminal device and the network device, and the indirect path is a transmission path requiring relay by a relay device for communication between the terminal device and the network device.

The invention relates to the technical field of power grid voltage fluctuation suppression, in particular to an active power distribution network voltage fluctuation suppression method and device, equipment and a storage medium. Determining a plurality of first sensitive indexes according to the current voltage of the first target load feeder line and the first current compensation amount; determining a first voltage compensation amount according to the voltage deviation and / or the voltage fluctuation value of the first target load feeder line; and finally, determining a plurality of reactive compensation amounts according to the first voltage compensation amount, the plurality of first sensitive indexes and the reactive allowance of the plurality of power supply feeders. According to the invention, the power supply feeder is selected according to the first sensitive index to compensate the voltage of the target load feeder, the reactive adjustment amount is small, the voltage compensation efficiency is high, the influence on the voltage of other load feeders is small, and more obviously, the voltage fluctuation is compensated through reactive power, the consumption of the new energy is not influenced, and the consumption rate of the new energy is improved.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information corresponding to power headroom reporting associated with simultaneous transmissions on a plurality of uplink channels, the configuration information indicating a maximum total transmit power limit associated with the simultaneous transmissions. The UE may transmit, based at least in part on the configuration information, a medium access control (MAC) control element (MAC CE) that includes at least one power headroom report corresponding to the plurality of uplink channels. Numerous other aspects are described.

The application discloses a power distribution cabinet distributed control system based on GCS, belongs to the technical field of power distribution systems, and can acquire safe and distributable power margin data based on actually measured power margin and a Monte Carlo method to predict power margin, so that power distribution of each loop is dynamically adjusted according to the differentiated charging demand of users, a control instruction is issued to a current limiter in series with a load side, the equivalent impedance of the current limiter is adjusted, and the current of the corresponding power supply loop is adjusted to realize power distribution. Compared with the prior art, the electric resource allocation of the application is more reasonable, the personalized charging demand of different users is taken into account, and the service flexibility of charging piles and user experience are improved.

The invention provides an LDPC-assisted non-orthogonal multiple access interference elimination method, receiving method, sending method and device, and relates to the technical field of transmission, and the interference elimination method comprises the steps: carrying out the continuous interference elimination of a non-orthogonal multiple access signal recovered from an optical signal, so as to obtain a large signal and a small signal, performing LDPC decoding on the large signal to obtain a decoded bit sequence; and reconstructing the large signal based on the decoding bit sequence to obtain a target large signal, and obtaining a target small signal based on the target large signal and the non-orthogonal multiple access signal. According to the invention, the noise generated by the judgment error of the large signal on the small signal can be effectively reduced in the non-orthogonal multiple access interference elimination process, the error rate of the small signal can be effectively reduced, the application performance of the small signal can be improved, and the power margin can be more reasonably utilized; and the reasonability of distributing the signals to the users can be improved to improve the user experience.

The invention discloses a starting generator voltage establishment control method, device and system based on power boundary analysis and compensation, and belongs to the field of motor control. The method comprises the following steps: acquiring a current parameter of a generator in a voltage establishment process, and discretizing the current parameter to obtain a current change rate at a current moment k; based on the first voltage boundary and the second voltage boundary, a current dynamic component compensation value is calculated in a preset current safety margin; calculating the maximum current variable quantity in the current switching period according to the current dynamic component compensation value; and performing current rate compensation on the current change rate at the moment k based on the maximum current variable quantity. Key factors such as the current change rate, the motor rotating speed and the load characteristic are considered, and rapid and stable voltage establishment under different rotating speed working conditions is achieved.

The present disclosure provides a method, device, user equipment, base station and storage medium for power headroom reporting, which belong to the field of communication technology. The method includes: receiving configuration information sent from a base station, indicating that the UE supports PHR reporting of a single or multiple TRPs in one carrier; receiving power control parameters supporting at least one TRP corresponding to at least one carrier sent from the base station; receiving a PHR reporting trigger condition of at least one TRP sent from the base station; and triggering PHR reporting of at least two TRPs corresponding to each carrier according to the power control parameters and the reporting trigger condition. The embodiment of the present disclosure provides a PHR reporting method adapted to a multi-TRP scenario, and ensures effective allocation of network resources.

A bandwidth upgrade control method and device for an optical access network, and a readable storage medium, relating to the technical field of optical communications, comprising: when it is detected that a target client needs to be switched to a target high-order code pattern, determining a link budget margin of the target client under a current code pattern; determining a target to-be-adjusted margin according to a target signal power margin required by a target client for switching from a current code pattern to a target high-order code pattern and the link budget margin; and adjusting the splitting ratio of an adjustable optical distribution network where the target client is located based on the target allowance to be adjusted, and controlling the host end and the target client to be modulated to a target high-order code pattern so as to realize network bandwidth upgrading of the target client. According to the invention, the flexibility of the optical access network can be improved, so that the bandwidth upgrading requirement is met.