73 results about "Power margin" patented technology

The invention belongs to the technical field of optical storage cooperative control, and discloses a new energy grid-connected optimization control method based on an energy storage system, which comprises the following steps: collecting a power grid impedance fluctuation amplitude, a harmonic distortion rate and environment temperature data, obtaining an initial SOC value, correcting the SOC value, calculating an adjustable power margin and a response delay parameter of a photovoltaic unit, and calculating the optimal power grid impedance fluctuation amplitude and the optimal power grid impedance fluctuation amplitude. Generating an efficiency responsibility table; constructing a response cluster, generating a frequency modulation task package, and further generating a three-dimensional efficiency mapping table; the inertia demand is dynamically calculated in combination with the power grid frequency change rate, a responsibility transfer strategy is automatically activated in a high-altitude and high-temperature scene, and an efficiency instruction set is generated; analyzing response deviation by simulating typical disturbance of a high-altitude weak power grid scene, positioning a deviation source in combination with historical data, and dynamically adjusting an efficiency weight correction factor; and updating a responsibility allocation rule of the efficiency responsibility table, disrupting the low-efficiency cluster, and recombining the high-adaptability unit.

The invention discloses a distributed new energy active power regulation and control method, device and equipment and a storage medium, and is used for solving the technical problems that an existing distributed new energy regulation and control mode is low in accuracy and poor in self-adaptability and real-time performance. Comprising the following steps: calculating a distribution network voltage compensation vector by adopting voltage deviation values of all distribution network nodes and an inverse matrix of a voltage sensitivity matrix; equally dividing the whole network power regulation quantity according to the number of the distributed energy equipment accessed to the distribution network node to generate a main network demand regulation vector; performing weighted fusion on the main network demand adjustment vector and the distribution network voltage compensation vector to obtain a global active adjustment target vector; calculating an equipment adaptation index of the distributed energy equipment by adopting an equipment adjustment capability parameter of the distributed energy equipment, a dominant frequency component in a global active adjustment target vector, a main network real-time power margin and a voltage deviation value; and allocating the adjustment task in the global active adjustment target vector to the distributed energy equipment for execution by adopting the dominant frequency component and the equipment adaptation index.

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 present application discloses a communication method and a related apparatus. The method comprises: a terminal device acquires first information, the first information comprising the signal quality of a wireless link between the terminal device and a network device, and / or the signal quality of a beam between the terminal device and the network device; the terminal device receives second information from the network device, the second information being related to the power margin of the network device; and the terminal device performs beam failure monitoring and recovery and / or wireless link monitoring and recovery on the basis of the first information and the second information. When the terminal device detects and recovers the beam and / or wireless link, the power margin of the network device is taken into account, so as to avoid the terminal device executing reconstruction or beam switching in advance when the network device still has the power margin, thereby reducing the network energy consumption and reducing the energy consumption loss.

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 embodiment of the invention provides a method and device for triggering power headroom reporting and terminal equipment, and relates to the technical field of communication. The method comprises the following steps: the terminal equipment receives at least one first path loss offset value and at least one second path loss offset value; the at least one first path loss offset value and the at least one second path loss offset value are from the network device. And the terminal equipment reports the power headroom based on the at least one first path loss offset value and the at least one second path loss offset value. In the present application, a terminal device obtains at least one first path loss offset value and at least one second path loss offset value sent by a network device, and determines whether to report the power headroom based on the variable quantity between the two path loss offset values, thereby solving the problem that the actual uplink path loss is inconsistent with the measured downlink path loss in a UL only TRP scene, and improving the accuracy of the uplink path loss report. And the existing triggering mechanism is not applicable.

The present invention discloses an analytical evaluation method for the static voltage stability margin of a new energy multi-station transmission system, which includes: obtaining the structure and parameters of the new energy multi-station transmission system, including line impedance and the power factor of new energy stations, splitting the structure of the original system, and transforming it into multiple simplified single-point transmission systems; obtaining the static stability power constraint conditions of each simplified single-point transmission system, which are the static stability power constraint conditions of the entire new energy multi-station transmission system; taking the equal sign for each power constraint condition simultaneously, solving the equations to obtain the power distribution of new energy stations in the limit state, and summing to obtain the power limit of the entire transmission system; combining the power of stations in the current state, calculating the power margin index, and evaluating the static voltage stability margin of the new energy multi-station transmission system. The present invention can quickly and accurately calculate the power limit of the entire transmission system, providing a very important decision-making basis for the safe and stable operation of the power grid.

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.

The invention discloses a receiving end power self-balancing control method and related equipment, which are applied to a multi-end flexible direct current transmission system of new energy. According to the method, a first converter station at a receiving end is set as a constant DC voltage control mode stable voltage reference, and other converter stations are set as a constant active power control mode to flexibly adjust power. And monitoring the active power deviation of the first converter station in real time, and dynamically updating the power reference value of each station according to the adjustment coefficient determined by each station based on the power margin when the active power deviation exceeds a preset power threshold, thereby promoting all receiving end converter stations to jointly bear unbalanced power. Compared with the prior art, the limitation that a single station bears unbalanced power is changed, and overload is avoided; the defect of difference adjustment of droop control is overcome, and the system voltage is accurately stabilized; power is allocated based on the power margin, avoiding imbalance. Through the mechanism, the adaptability of the system to new energy fluctuation is improved, and stable operation of the multi-terminal flexible direct-current power transmission system is guaranteed.

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 a frequency modulation method of a multi-terminal flexible direct current power transmission system, and belongs to the technical field of direct current power transmission. The method comprises the following steps: improving a frequency droop control strategy by considering the power margin and the frequency margin of a converter station and the actual operation state of a controller; a target power set value of a receiving end converter station is regulated and controlled in real time, and the problem of power imbalance caused by power grid frequency fluctuation is distributed; establishing a dynamic coupling relationship between the frequency and the direct-current voltage by applying a virtual inertia control technology, and adjusting a virtual inertia coefficient in time according to the actual deviation of the direct-current voltage; based on real-time monitoring and judgment of direct-current voltage and frequency preset threshold values, various frequency modulation devices are gradually started and put into use according to a preset sequence. According to the method, the multi-terminal flexible direct current system actively participates in power grid frequency adjustment, meanwhile, the increase of direct current voltage deviation can be effectively inhibited, and it is ensured that the normal side alternating current power grid frequency is always in a stable operation interval.

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.