100 results about "Power correction" patented technology

The invention relates to the technical field of photovoltaic power supply management, and discloses a photovoltaic parking building power supply management method, device and system, and a storage medium. The method comprises the steps of determining real-time irradiation and component temperature data of a parking building ceiling photovoltaic component matrix, calculating an actual light receiving area according to component surface shadow distribution, and generating a photovoltaic output power correction parameter in combination with a historical attenuation coefficient; constructing a photovoltaic power generation capacity fluctuation sequence in unit time based on the parameters, identifying a power generation capacity decline time period and a power output gap, and marking the power generation capacity decline time period and the power output gap as a power supply unstable interval; according to the interval time sequence distribution, matching real-time load demand data of the charging piles in the building, calculating the power difference between the load demand and the power generation capacity, and generating a priority power supply sequence table; and dynamically distributing photovoltaic power to charging loads with different priorities according to the sequence table, adjusting charging and discharging threshold values of the building energy storage system, and generating a photovoltaic power dispatching instruction. The method can accurately evaluate the power generation capacity, respond to power generation fluctuation and optimize power distribution.

The invention relates to the technical field of power system automation, and discloses a cooperative control method, system and device for inverters in a power distribution area and a medium, and the method comprises the steps: carrying out the identity authentication of the inverters in the power distribution area through constructing a distributed authentication platform, and constructing a logic neighbor network of the inverters; determining the operation capability of the inverter according to the physical constraint and power operation data of the inverter, and constructing a multi-time scale coordination framework according to the real-time demand of the power distribution area to determine a bidding strategy set of the inverter; constructing a transformer area clearing model considering the safety of the power distribution transformer area, and solving the transformer area clearing model according to the logical neighbor network and a distributed optimization algorithm to obtain a power control instruction of an inverter; the distributed authentication platform monitors the operation state of the power grid in the power distribution area, and when the risk is triggered, a security check algorithm is started to correct the power control instruction, and a power correction instruction is obtained to control the inverter to execute; and under the condition of considering the safety and the cost, the refined cooperation of the district level is realized.

The invention relates to the technical field of charging pile charging control, in particular to a flexible charging regulation and control system and method for a charging pile, and the method comprises the steps: obtaining real-time service parameters of the charging pile; calculating a stress accumulation item and a stress dissipation item; the equivalent lithium ion concentration stress of the current period is obtained through updating in combination with the stress accumulation item and the stress dissipation item; calculating a stress suppression item; generating a correction function; generating a dynamic current limit value by combining the stress suppression item, the correction function and a preset reference maximum allowable current; resolving a request current based on the power grid power instruction and the battery terminal voltage; generating a scheduling feasibility index in combination with the request current and the dynamic current limit value; according to the scheduling feasibility index, hierarchical power correction is executed, and actual issuing power is output; according to the invention, the operation safety of the battery is greatly improved, and the overall value of battery assets is greatly prolonged.

The application discloses a power following compensation correction control method for a range extended electric vehicle, and steps are as follows: S1, power correction: initial demand power generation is calculated, and final power generation is obtained by correction according to current atmospheric pressure, SOC and load compensation; S2, speed correction: first correction power generation speed and power generation torque between maximum and minimum values are calculated, second correction power generation speed and simulation speed are calculated and accumulated, and final power generation speed is obtained together with preset maximum power generation speed; S3, torque correction: initial power generation torque is calculated according to final power generation and final power generation speed, feedforward correction torque is calculated according to feedforward compensation control, and finally, final power generation torque is obtained. The application also discloses a power following compensation correction control device and a computer system for the range extended electric vehicle. The application can ensure good driving following property under the premise of optimal fuel consumption and NVH performance, and can be widely applied in the field of the range extended electric vehicle.

The invention relates to the technical field of power control, in particular to an active regulation space quantitative evaluation method considering active voltage coupling influence, and the method comprises the steps: firstly constructing a steady-state power flow equation containing DC control characteristics, correcting a Jacobian matrix through introducing a commutation bus power correction, and building a voltage active sensitivity index; probabilistic load flow calculation is carried out in combination with a new energy output probability model, and a voltage weak node is accurately identified by using an impedance mode margin index; and generating a PV curve by adopting a continuous power flow method, superposing a static voltage safety constraint condition, and performing intersection operation on a unit output interval and a reserve capacity interval in a safe operation range to obtain an effective active power regulation space, thereby accurately quantifying the actual regulation capability on the premise of ensuring the voltage safety, and further realizing high-precision voltage regulation. And the safety and the economical efficiency of system operation are effectively improved.

The invention discloses a multi-inverter module off-grid parallel operation control method and a storage medium. According to the control method, a three-ring series control method comprising a power ring, a voltage ring and a current ring is adopted for each inverter module; power distribution is carried out among the multiple inverter modules according to an agreed droop curve; the power loop is used for controlling power output of the system; the power loop introduces virtual synchronous machine control and power correction according to an agreed droop curve to obtain voltage frequency and amplitude needing to be output; the voltage loop is used for maintaining the stability of system output voltage; the current loop is used for controlling output current; the voltage loop and the current loop are respectively controlled by positive and negative sequences. Real-time communication of the inverter modules is removed, configuration of the master and slave modules is removed, the inverter modules operate independently, the master and slave modules are not separated, and the problems of power coordinated distribution and the like caused by downtime of part of modules in a multi-inverter module parallel system are solved.

The invention provides a battery management system, a heat pump regulation and control method, equipment and a medium, and relates to the technical field of heat pumps. The pressure overshoot of the refrigerant in the working condition switching process is extracted from the response data, and then the dynamic stability index of the heat pump unit in the working condition switching process is determined based on the pressure overshoot and the temperature difference change rate of the refrigerant on the two sides of the evaporator; the tracking cost of battery temperature control of the heat pump unit in the working condition switching process is determined; the power regulation and control quantity of the compressor in the working condition switching process is obtained, correlation correction is conducted on the power regulation and control quantity according to the dynamic stability index and the tracking cost, and a power correction factor of the compressor is obtained; and the output power of the compressor in the working condition switching process is subjected to balanced regulation and control according to the power correction factor. By the adoption of the scheme, dynamic balance adjustment of the power of the heat pump in the working condition switching process can be achieved.

This application provides a method, electronic device, and storage medium for online power monitoring of photovoltaic modules. The method includes: constructing verification conditions; determining a valid test time based on pre-established verification conditions (string operating status verification, irradiance integer value verification, and irradiance stability verification); real-time power correction of the module based on the measured irradiance and cell temperature at the valid test time; determining the online power test value based on the corrected power value under the same integer irradiance reference value; when the integer irradiance reference value reaches a preset high irradiance threshold, correcting the online power test value to standard test conditions to obtain a comparable online power test value; determining the current control reference for the current test cycle based on its corresponding factory power correction value; and updating the dynamic iterative control reference based on the current control reference and historical control references to perform power anomaly monitoring. This application achieves accurate online testing and anomaly identification of photovoltaic module power.

This invention proposes a fast frequency control method and device for wind-solar-storage power stations, belonging to the field of fast frequency and active power control technology for new energy power stations. The method includes: at the arrival of each sampling period, updating the active power target values ​​of wind turbines, photovoltaics, and energy storage based on whether the grid connection frequency of the wind-solar-storage power station is outside the upper and lower limits of the frequency warning and the active power regulation capabilities of wind, solar, and energy storage, reserving the maximum active power regulation capability of photovoltaics and energy storage; calculating the total active power regulation of the wind-solar-storage power station based on whether the grid connection frequency is outside the upper and lower limits of the frequency and the active power frequency droop curve function; updating the active power target values ​​of wind turbines, photovoltaics, and energy storage based on the active power regulation demand and the active power regulation capabilities of photovoltaics and energy storage; and performing active power correction for energy storage and photovoltaics when the fast frequency response time arrives. This invention can utilize the fast active power regulation capabilities of photovoltaics and energy storage to compensate for the capacity loss due to the inability of wind turbine active power regulation to be implemented on time, restoring the fast frequency response capability of the power station.

The invention discloses a power prediction method and device, electronic equipment and a storage medium, and belongs to the technical field of electric power, and the method comprises the steps: generating first feature information based on predicted irradiation data of a target region where a target power generation assembly group is located in a first time period in the future and the first time period in the future; using a power prediction model corresponding to a reference component of the target power generation component group to predict first power data of the reference component in a future first time period based on the first feature information; generating second feature information based on the future first time period, the component information of the first component and the reference component and the historical operation state features in the second time period; using a power correction model corresponding to the target power generation component group to predict a power correction coefficient corresponding to the first component in the future first time period based on the second feature information; second power data for the first component during a future first period is determined based on the first power data and the power correction factor. The method can significantly improve the precision of short-term power prediction of the power generation assembly.

The invention discloses a gear pair wind resistance power loss test method, platform and device, and relates to the technical field of power loss tests.Oil is injected to a gear pair through an oil injection lubrication control system, and a motor drives a driving wheel to drive a driven wheel to rotate; rotating the rotating speed knob at a preset rotating speed to increase the rotating speed, recording the torque value of the current input torque rotating speed sensor and the torque value of the current output torque rotating speed sensor every time the preset increment rotating speed is increased, and determining the driving wheel transmission power and the driven wheel transmission power on the basis; drawing a power-rotating speed curve graph based on the rotating speed of the motor and the difference value between the driving wheel transmission power and the driven wheel transmission power, and determining the parasitic power of the gear pair based on the curve graph; and correcting the parasitic power of the gear pair to obtain a corrected value of the parasitic power of the gear pair, subtracting the corrected value of the parasitic power of the gear pair from the obtained difference value to obtain a wind resistance power loss value of the gear pair, and rapidly and accurately testing the wind resistance power loss of the gear pair.

This application discloses a method and system for predicting wind turbine icing power based on sensitivity and hyperbolic residuals, belonging to the field of wind power generation technology. The method includes: collecting wind turbine datasets; calculating theoretical ice-free power based on blade element momentum theory; obtaining weighted equivalent ice thickness from the wind turbine dataset using a pre-calibrated sensitivity function, and constructing a power correction model based on the theoretical ice-free power to obtain the corrected power; fitting the residual between the observed power and the corrected power using a generalized hyperbolic distribution; constructing a state-space model and updating the parameters of the state-space model based on a particle filter algorithm incorporating physical consistency constraints; outputting the final power prediction value based on the determined parameters of the state-space model, and calculating the uncertainty confidence interval and icing risk probability index; improving the accurate characterization of asymmetric ice layers, making the confidence interval coverage of the state-space model more accurate when predicting extreme icing events, and enhancing robustness.

This application discloses a temperature control method and related apparatus. First, it acquires the current operating data of the crystal furnace. Then, based on the current operating data and a first prediction model, it determines the timing for shutting down the low-level heater. Furthermore, by predicting the timing for shutting down the bottom heater, it controls the bottom heater, resulting in better temperature control. Next, based on the current operating data, a second prediction model predicts the first time interval for the solution percentage in the crystal furnace to reach a second preset threshold. Then, based on the first time interval and the current operating data, the prediction model predicts the power correction amount for the main heater. Finally, based on the power correction amount, it controls the main heater to ensure consistent liquid temperature after temperature control. Therefore, it achieves better consistency in liquid temperature after temperature control, realizes standardized temperature control of the crystal furnace, and improves the accuracy of temperature control.

The invention relates to the technical field of electric energy quality, in particular to a system short-circuit capacity estimation method and system considering voltage fluctuation quantity and reactive correction. The method comprises the following steps: calculating a reactive power array of a power supply main incoming line of a concerned bus; identifying a reactive power abrupt change point corresponding to the maximum change of the adjacent extreme point in the monitored reactive power array, and obtaining the maximum reactive power value and the minimum reactive power value corresponding to the reactive power abrupt change point, and the fundamental wave voltage effective values of the concerned bus corresponding to the maximum reactive power value and the minimum reactive power value; correcting the maximum reactive power value and the minimum reactive power value corresponding to the reactive power abrupt change point to obtain a corrected reactive power value under the nominal voltage; calculating a voltage fluctuation quantity according to the fundamental wave voltage effective value of the concerned bus; and calculating the short-circuit capacity based on the voltage fluctuation quantity and the corrected reactive power value under the nominal voltage.

The application discloses a kind of first monitoring and grid point voltage and station reactive power, reactive power output value is calculated by reactive power voltage regulating coefficient, and instruction is issued to power station reactive power equipment;Again, real-time voltage and station reactive power of re-monitoring grid point, real-time voltage is in voltage regulation dead zone, then dynamic voltage regulating reaches target value, no longer carries out voltage regulating;If grid point voltage is still outside grid point voltage regulation dead zone, then according to the real-time voltage and station reactive power of monitoring, correct reactive power voltage regulating coefficient, with corrected reactive power voltage regulating coefficient, carry out dynamic voltage regulating again by droop curve, until voltage regulation is in dead zone range.The improved droop regulation of closed loop verification retains the rapidity of open loop droop regulation, and also has the accuracy of closed loop regulation.In the process of voltage regulating, by controlling the number of closed loop feedback, the problem of adjustment oscillation can be effectively prevented to solve the problem of existing dynamic voltage regulating not in place.

A method is presented for determining a setpoint signal of a wind energy conversion system. The method includes: providing a first input signal, comprising system frequency values of an electric power system, and a second input signal comprising an angular speed value of a wind energy conversion system; determining, from the first input signal, an intermediate signal comprising system frequency deviation values, the system frequency deviation values indicating deviations between the system frequency values and a target frequency value; determining, from the intermediate signal and the first input signal, a power correction signal comprising a first power value; determining, from the second input signal, a first reference signal comprising a second power value corresponding to a point of maximum power extraction of the wind energy conversion system; and determining a setpoint signal for setting an output power value of the wind energy conversion system.

The application relates to the field of wireless communication, in particular to a wireless communication intelligent anti-interference method and system based on artificial intelligence, which comprises the following steps: collecting a sending signal value sequence of any radio transmitting equipment, collecting a receiving signal value sequence with a label of any radio transmitting equipment; obtaining an interference process, calculating an interference weight of an interference equipment on a target equipment according to the sending signal value sequence and the receiving signal value sequence, so as to calculate a transmitting power adjustment coefficient of the target equipment in a detection process; taking the product of the transmitting power adjustment coefficient and a preset transmitting power value of the target equipment as a transmitting power correction value of the target equipment, returning the transmitting power correction value to the target equipment for real-time transmitting power adjustment of a radio frequency signal, and completing communication anti-interference. Through the technical scheme, the precision of a wireless communication anti-interference result can be improved.

The application discloses a Sepic type power correction circuit based on a switched inductor, which comprises switching tubes S1-S3, diodes D1-D5, inductors L1-L5, capacitors C1 and C o The diodes D3-D5 and the inductors L4 and L5 form a switched inductor structure, and the voltage gain of the converter is D / (2-D). Compared with a conventional Sepic PFC converter, the Sepic type power correction circuit based on the switched inductor improves the step-down gain, ensures that the whole duty cycle range is in a step-down state, and has a larger duty cycle than the conventional Sepic PFC converter in the case of a high step-down ratio, thereby effectively avoiding the emergence of a limit duty cycle. The no-bridge structure can realize lower conduction loss. The original output diode is replaced by the switched inductor structure, so that the output current is continuous, and the output current can be filtered. All the switching tubes are common ground, and a lower-cost driving circuit can be used.

The invention relates to the technical field of vehicles, in particular to a fuel cell power distribution method and device, a vehicle and a storage medium. The method comprises the steps of judging whether a vehicle is in a loading operation condition; if the vehicle is in the loading operation working condition, the current total demand power of the vehicle, the current charge state of a power battery and the total demand power change value are obtained, and a power correction value is determined according to the current charge state and the total demand power change value; and obtaining the target output power of the fuel cell according to the power correction value and a preset basic power value, and obtaining the target output power of the power cell according to the current total demand power and the target output power of the fuel cell. Therefore, the problem that the service life and the efficiency of the fuel cell are seriously damaged due to frequent load change, start and stop of the fuel cell caused by the fact that the difference of power requirements of driving and operation of the sanitation vehicle is not fully considered in the prior art is solved, and real-time optimal power distribution is realized.

The present application relates to the technical field of power regulation, in particular to a refrigeration control strategy optimization method based on cold storage and electricity price change, comprising the following steps: through collecting refrigeration capacity and refrigerant temperature difference, calculating the difference between cold demand and refrigeration capacity, combining real-time electricity price and energy efficiency parameter normalization to generate energy efficiency parameter correction result, analyzing power correction coefficient and electricity price segmentation, setting cold storage and cold release instructions, adjusting cold storage or cold release strategy combined with electricity price trend, generating electricity price response control strategy set, and optimizing cold storage power regulation; in the present application, through the difference between cold demand and refrigeration capacity calculation, combined with real-time electricity price and energy efficiency parameter normalization, fitting energy efficiency parameter correction result, based on electricity price segmentation analysis, setting appropriate cold storage or cold release instructions, improving the energy efficiency of the equipment in the peak-valley electricity price interval, adjusting the cold storage or cold release strategy according to the electricity price trend to avoid energy waste, finally improving the electricity utilization efficiency, reducing the cost, and enhancing the flexibility and adaptability of the refrigeration trolley.

The invention discloses a power correction and control method for a hybrid energy storage system, and the method comprises the steps: monitoring the current SOC values of a lithium iron phosphate battery and a super capacitor, and carrying out the SOC interval division of the lithium iron phosphate battery and the super capacitor in a power correction controller according to a preset threshold value; correcting the original power instruction according to the SOC interval of the lithium iron phosphate battery and the super capacitor; sampling regularly by using a black-wing plinary algorithm, and optimizing PID parameters in real time; the real-time optimized PID acts on the current tracking error, a PWM modulation module outputs a duty ratio instruction signal, and then the hybrid energy storage system is controlled to work. Through cooperative control of dynamic power correction and parameter self-adaption, sudden power change is suppressed, the dynamic response capability of the system is improved, the risk of over-charging and over-discharging of equipment is reduced, and technical support is provided for hybrid energy storage.

The application provides a vehicle energy consumption prediction method and device, an electronic device and a storage medium, wherein the method comprises the following steps: obtaining a target predicted residual power of a power battery of a vehicle and a target predicted consumed power of the vehicle when the vehicle arrives at a destination from a specified position, which are determined at a last time; determining target residual power correction logic according to the target predicted residual power and the target predicted consumed power; obtaining a current actual residual power of the power battery at a current time; predicting a current predicted residual power of the power battery when the vehicle arrives at the destination based on the current actual residual power and a remaining route of the vehicle from a current position to the destination; and updating the target predicted residual power by the current predicted residual power when it is determined that the current actual residual power and the current predicted residual power meet the target residual power correction logic. Through the application, the technical problem of poor accuracy of vehicle energy consumption prediction in the related art is solved.

The utility model relates to the technical field of switching power supplies, and provides a switching power supply for adjusting the duty ratio of multiple points, which comprises a switching power supply main circuit, and a power correction circuit, an output voltage adjusting circuit and an output voltage stabilizing circuit which are connected with the switching power supply main circuit, the switching power supply main circuit comprises an inductor LF1, an inductor LF2, rectifiers BD1 and BD2, an inductor L2, an inductor L1, a diode D7, a resistor NTR2 and a transformer T1 which are sequentially connected from an alternating current input end to a direct current output end, a first output end of the transformer T1 outputs a direct current power supply, and a second output end of the transformer T1 is grounded through a switching tube Q7. Through the scheme, the electric energy utilization efficiency, the voltage stabilization precision and the load regulation rate of the power supply are improved, and stable and reliable direct current power supply output can be provided under various load conditions.

A frequency and power modulation radio frequency (RF) generator includes a first frequency and power modulation RF generator including a signal generator configured to generate an RF signal, an amplifier configured to amplify power of the RF signal from the signal generator, and a phase controlled power correction (PCPC) circuit configured to control a phase of the RF signal amplified by the amplifier. The signal generator, the amplifier, and the PCPC circuit are controlled to perform multi-level pulsing and frequency modulation on the RF signal, thereby supplying RF power of the RF signal to a chamber. The multi-level pulsing has pulse forms with different power levels.

The invention discloses a battery pack electric quantity correction method, a controller and an energy storage system. The method comprises the following steps: acquiring voltage values of a plurality of battery cells; when the voltage values of the plurality of battery cells meet a preset condition, executing the following correction operation; according to the voltage value, a first electric quantity value of the corresponding battery cell is corrected, and the first electric quantity value is used for representing the relative ratio of the electric quantity value of the battery cell to the reachable maximum electric quantity value of the battery cell. The first electric quantity value of each battery cell is pertinently corrected, so that parameters obtained by a final user can clearly reflect the difference between the current total electric quantity value of the battery pack and the reachable total electric quantity value of the battery pack, and can also reflect the states of other battery cells except the fully charged battery cells in the battery pack.

This invention discloses a sludge pretreatment method and system, belonging to the field of sludge treatment technology. The method includes: determining a target torque value; acquiring the outlet sludge temperature, influent sludge flow rate, influent sludge concentration, and real-time torque value; calculating a power correction amount if the torque value is greater than the target torque value; acquiring an allocation weighting factor based on the above data, and then acquiring the allocated power for ultrasonic and microwave treatments; if the outlet sludge temperature is within a preset first and second temperature threshold range within a preset time period, acquiring and issuing control commands for each device, and re-acquiring the outlet sludge temperature and real-time torque value; if the torque value is equal to the target torque value and the outlet sludge temperature is within the preset first and second temperature threshold range within the preset time period, the sludge pretreatment is completed. Therefore, by implementing this invention, the problem of inaccurate coordinated control of ultrasonic and microwave technologies, leading to unstable sludge treatment effects, can be avoided, achieving efficient pretreatment of sludge from wastewater treatment through the synergistic effect of ultrasonic and microwave technologies.

The invention discloses a virtual synchronous machine participated double-layer frequency modulation and voltage regulation control method, which comprises a fast inertia response process and an active frequency modulation recovery process, and is characterized in that when a frequency deviation change rate exceeds a preset threshold value, a VSG generates additional active power which is inversely proportional to the frequency deviation change rate, and the VSG recovers the active frequency modulation; active power is applied to the VSG; the active frequency modulation recovery process comprises the following steps: when the continuous existence time of the frequency deviation exceeds a preset value, the VSG calculates an active power correction amount, generates the active power correction amount through a PI controller of the VSG or generates the active power correction amount through a water turbine governor, and acts on the total active power until the frequency is recovered to a rated value. A whole-process frequency control method is adopted, a'passive + active 'double-layer frequency modulation framework is provided, frequency sudden change is suppressed, steady-state deviation is eliminated, and a'dynamic suppression-steady-state recovery' closed-loop control process of frequency is realized.