327 results about "Power difference" patented technology

The invention belongs to the field of data processing, and particularly relates to a dynamic cooperative control system and method for a gas turbine and a micro-grid, and the method comprises the steps: constructing a micro-grid real-time monitoring module, continuously collecting distributed energy real-time output, controllable load demands, bus voltage frequency and equipment state parameters, and carrying out the filtering and noise reduction through a preprocessing unit, thereby guaranteeing the data precision; calculating a real-time power difference value based on the preprocessed data, calling an adaptive neural fuzzy inference system, taking the power difference value, the bus voltage deviation and the frequency deviation as input, and judging whether the power difference value, the bus voltage deviation and the frequency deviation exceed a preset threshold value by means of a fuzzy rule base and a neural network model; if the threshold values are not exceeded, the current states of the gas turbine and the energy storage system are maintained; if any one exceeds the threshold value, a dynamic cooperative control instruction is triggered, precise cooperative control of the gas turbine and the micro-grid is achieved, and the operation stability, the operation efficiency and the reliability of the micro-grid are improved.

The invention belongs to the technical field of power systems and automation thereof, and relates to a virtual inertia fuzzy self-adaptive new energy inverter frequency active support method. Aiming at the problem of power grid frequency stability caused by new energy power generation intermittency and volatility, the method comprises the following steps: simulating inertia characteristics of a synchronous generator through a direct current side capacitance control strategy; detecting the frequency of the power grid by using a power synchronous ring, and converting a power difference value into a frequency deviation; designing a fuzzy control module, and adjusting the coefficient of the virtual inertia controller in real time according to the frequency deviation to optimize the frequency response; an inverter current given value is adjusted according to the output of the fuzzy control module, and active and reactive power output is calculated and controlled; relevant parameters are monitored in real time, the performance of the self-adaptive control module is evaluated, and parameter optimization response of the fuzzy controller is adjusted. The frequency stability and reliability of the power grid can be effectively improved, the control flexibility and precision of the inverter are improved, and new energy efficient grid-connected power generation is promoted.

The invention relates to the technical field of electric power reactive power compensation, in particular to a novel static dynamic reactive power compensation device and a control method thereof, and the device comprises a power grid state monitoring module, a reactive power demand calculation module, a compensation control execution module, a harmonic suppression module and a dynamic energy storage support module. According to the method, through real-time extraction and segmented analysis of the dynamic operation parameters of the power grid, accurate perception of the state of the power grid is realized, the transient characteristics of operation are represented, an accurate basis is provided for subsequent compensation, decomposition and classified accumulation of reactive power requirements are realized, inductive and capacitive power differences are accurately identified, the calculation accuracy and efficiency are improved, and load adaptation is optimized; in harmonic suppression, resolution and response speed are enhanced through signal separation and frequency correction, energy storage and compensation linkage is improved through dynamic energy storage optimization, dynamic response capability is enhanced, loss is reduced, voltage stability and power factors are improved, stable guarantee is provided for complex fluctuation scenes, and electric energy is saved.

The invention relates to the technical field of energy storage control, and discloses a demand control method and system based on industrial and commercial energy storage, and the method comprises the steps: obtaining and carrying out the standardized processing of a real-time load demand, an energy storage state and power grid dispatching data; establishing a load prediction model to generate demand baseline parameters, and constructing a dynamic adjustment rule base; the energy storage output is verified in real time, and the dynamic response trend of the power difference value is analyzed; and generating a demand control index to determine a charging and discharging strategy. The system comprises a load monitoring module, a strategy generation module, a dynamic execution module and a control judgment module which are respectively used for realizing data acquisition and processing, model construction, output verification analysis and strategy judgment functions. According to the scheme, through multi-dimensional data integration, dynamic rule base optimization and multi-constraint coordination technologies, the precision and economical efficiency of industrial and commercial energy storage demand control are improved, the demand electric charge can be effectively reduced, the electric energy utilization rate is improved, and the method is suitable for energy storage management and power grid collaborative optimization of industrial and commercial users.

The invention belongs to the technical field of equipment energy-saving control, and particularly discloses and provides an energy-saving control system based on a direct-current bus system, which comprises a direct-current bus framework module, an equipment state acquisition module, an equipment state analysis module and an energy flow control module. According to the method, the direct current bus voltage and the multi-dimensional operation data of the equipment motor are collected in real time, the motor power state space model is constructed by means of the Kalman filter, and the power sudden change probability of the future preset time period is accurately predicted. And meanwhile, an energy distribution strategy is dynamically adjusted in combination with the total power demand generated by the production schedule and according to the braking type and the power sudden change probability. The defect that dynamic power difference cannot be tracked through fixed threshold value feed-forward compensation in the prior art is effectively overcome, so that bus energy deposition is avoided, braking energy is distributed according to needs, meanwhile, it can be ensured that the braking energy can be recycled timely and correctly, and energy waste caused by misjudgment is reduced.

The invention relates to the field of locomotive power battery electric quantity control, and particularly discloses a locomotive power battery electric quantity hysteresis equalization control method, which comprises the following steps that: a traction force exerting mode is reset into an axle load transfer mode, and the initial value of an electric quantity equalization compensation coefficient K is a rack axle load transfer coefficient corresponding to zero speed; judging whether the current mode is a power battery power supply mode; if yes, the TCU receives the electric quantity of a front power battery and the electric quantity of a rear power battery in real time according to the current locomotive working mode, calculates the electric quantity average value difference value, monitors the auxiliary load power and the traction motor power and calculates the power difference value; entering a hysteresis control logic process; calculating a dynamic traction force compensation coefficient, ensuring that the traction force compensation amount is matched with the actual load characteristic of the system, correcting the traction characteristic curve in real time, and dynamically compensating the electric quantity difference of the battery; and performing traction distribution control according to the locomotive speed and outputting corresponding traction.

The invention relates to the technical field of energy storage modules, in particular to a direct-current power supply energy storage system suitable for various household appliances. According to the method, the current change value and the power fluctuation range of the energy storage unit are analyzed, statistics of the power change amplitude and the time interval is combined, the work cycle rule of the energy storage unit is defined, the power difference between the partitions is extracted through the Markov chain model, and real-time balance of the partition power supply state is achieved by gradually optimizing path distribution. And resource waste caused by power fluctuation is effectively reduced. Through gradual correction of a real-time output power value and a target power value, dynamic power matching of an energy storage unit is realized, the flexibility and accuracy of energy distribution are improved, voltage fluctuation trend is monitored and adjusted through a variational mode decomposition technology, voltage stability control of an energy storage module is realized, the reliability of an energy storage system is optimized, and the energy storage efficiency is improved. And the overall stability and the energy utilization efficiency are improved by matching the output power and the frequency adjustment range.

The invention relates to the technical field of source-load cooperative scheduling analysis, and relates to a virtual power plant multi-time scale source-load cooperative scheduling control system. According to the method, the hourly consumption load of the current day in the coverage area of the virtual power plant is counted and the total demand load is predicted in combination with historical load demand data, so that accurate prediction of the regional load is realized; energy storage power source dispatching requirements are judged according to the supply power of the virtual power plant, the dispatched energy storage power sources are screened, the output sequence of the dispatched energy storage power sources is determined according to the minute-level consumption load and the supply power in the current time period, and ordered dispatching of the energy storage power sources in supply and demand scenes in different time periods is achieved. Meanwhile, the real-time second-level consumption load is compared with the real-time supply power to obtain the real-time demand power difference, the power of the energy storage power supply is adjusted and scheduled according to the real-time demand power difference, refined dynamic adjustment of the power of the energy storage power supply is achieved, and a systematic solution is provided for virtual power plant multi-time scale source-load cooperative scheduling.

The invention discloses a PTC power control method for IGBT (Insulated Gate Bipolar Transistor) staggered frequency starting and related equipment, and relates to the field of automobile heating, the method comprises the following steps: acquiring a target power value under the condition that a power request signal is received; based on the target power value, calculating to obtain an average starting duty ratio of the plurality of power control units; generating a first control signal corresponding to each power control unit based on the average opening duty ratio; according to the first control signal, controlling each power control unit to be switched on in an error frequency manner; when it is detected that the power difference value between the actual output power of each power control unit and the target power value exceeds a preset deviation threshold value, the starting duration of each power control unit is adjusted, and a second control signal is obtained; and controlling each power control unit based on the second control signal until the power difference value does not exceed the preset deviation threshold value. By implementing the method, the heating performance of the power control unit in automobile heating can be improved.

The invention discloses a control method of a flat wire motor. The method comprises the following steps: constructing an optimal current instruction table taking a rotating speed and a torque as indexes; if the motor is in the dynamic working condition, directly looking up a table to obtain a current optimal current instruction; if in a steady-state working condition, performing online search by taking a table look-up result as an initial point: generating two-dimensional Bernoulli random disturbance, and sequentially applying positive and negative disturbances to the initial point; respectively measuring the input power under the two disturbances; according to the ratio of the positive and negative input power difference to the corresponding disturbance component, synchronously calculating gradient estimation vectors of the system input power to d-axis and q-axis current; according to a steepest descent method, the current instruction is updated in the reverse direction of the gradient, an optimal instruction enabling the input power to be minimized is obtained, and an inverter is driven to control a motor to operate. According to the method, through a hybrid control strategy combining dynamic table look-up and steady-state online search, the total loss minimization of the flat wire motor under all working conditions in consideration of alternating current copper loss is realized, and the rapidity of dynamic response is ensured.

The invention provides a new energy station load stability control method and system based on mutual conversion of electricity and hydrogen energy. Obtaining a generated power prediction curve of the new energy power generation facility, and determining a power difference value between the new energy power generation load and the power grid stability demand based on the prediction curve; a surplus hydrogen production electricity consumption instruction is issued, the operation number and the hydrogen production rate of an electric hydrogen production module are dispatched, and surplus electric energy is converted into hydrogen energy to be temporarily stored; receiving a real-time charging demand signal, dynamically issuing a charging permission load instruction based on the current new energy power generation load and the hydrogen gas turbine power generation load, and scheduling the power output of each charging pile; and according to the real-time states of the new energy power generation load, the electrical hydrogen production electrical load, the charging pile electrical load and the hydrogen gas turbine power generation load, starting, stopping and output power of the hydrogen gas turbine are adjusted, and reverse compensation of the new energy fluctuation power is achieved. New energy power generation fluctuation can be effectively stabilized, abandoned wind and abandoned light are reduced, and stable power supply of the distributed charging pile is achieved.

The invention provides a diesel-storage hybrid power anti-overload system and device based on a network-forming inverter, and a medium. A pre-synchronization module realizes seamless switching between a VSG mode and a PQ mode based on dynamic voltage amplitude matching, phase-locked loop frequency synchronization and phase real-time alignment technologies; the hardware current limiting module adopts high-speed current monitoring and hardware-level protection logic to cut off an overcurrent pulse in real time and prevent a power device from failing due to transient impact; the power suppression module optimizes the power distribution of the diesel generator and the energy storage by judging an overload threshold value and a steady state recovery condition in real time; the logic judgment module coordinates the diesel generator dynamic frequency modulation and energy storage mode switching, the diesel generator preferentially bears the transient power difference when the load suddenly changes, and the energy storage mode is seamlessly switched to the network construction mode after the system recovers the steady state; according to the system, through software and hardware full-link collaborative design, the problems of transient overload and mode switching instability of the diesel storage system are solved, and the stability and energy efficiency of the diesel storage hybrid power system are improved.

The invention discloses an energy fine management method and device for an optical storage and charging integrated power station. The method comprises the following steps: determining the charging power difference between the power generation power of new energy of the power station and the power required by charging of an electric device; establishing a relation function between the unit electricity price and the charging power difference of the power station, and representing the charging power difference through the unit electricity price; the unit electricity price is used as an input variable of the fuzzy logic controller, and the output current of the energy storage battery is used as an output variable of the fuzzy logic controller; and the magnitude and the flow direction of the output current of the energy storage battery are controlled by using the output result of the fuzzy logic controller. By adopting the scheme, the expected charging and discharging state of the battery is controlled, the service life of the battery is prolonged, the transmission power between the power station and the power grid is stable, no large instantaneous fluctuation exists, stable control over the light storage and charging integrated power station is achieved, meanwhile, the dependence of the power station on the external power grid is reduced, and the economic benefits of power consumers are improved.

The invention relates to the technical field of photovoltaic power generation monitoring, in particular to a power generation monitoring method and system for a photovoltaic panel, and the method comprises the steps: collecting the electrical parameters and environmental parameters of the photovoltaic panel in real time, and determining a preliminary voltage adjustment step length according to the electrical parameters and equivalent impedance characteristics of the photovoltaic panel; according to the change amplitude, the change rate and the historical stability of the illumination intensity and the temperature at the current moment, an environment influence factor is constructed, the initial voltage regulation step length is subjected to nonlinear correction through the environment influence factor, and the self-adaptive constraint and relaxation regulation of the step length on the severe environment change are realized. And on the basis, carrying out multiple symmetric disturbance operations on the voltage at the current moment, judging the adjustment direction through power difference, and carrying out dynamic adjustment in combination with the step length until the maximum power point is determined. The method improves the accuracy, stability and response sensitivity of photovoltaic power generation monitoring in a complex environment.

The invention discloses a shared charging equipment instruction control system and method based on multi-mode signal fusion, particularly relates to the field of shared charging control, solves the protocol out-of-step overshoot risk, takes a handshake millisecond window as a switching-in port, and synchronously checks a digital message and a physical transient state through surge energy and thermal inertia double indexes. Locking an instruction missing risk before a driving link; the residual error-message joint judgment captures hidden abnormity in real time at a power issuing node, a rollback channel is rapidly pulled back to a safe power grade, and brand-channel mapping logic is triggered to re-plan output resources; a threshold bin dynamically tightens a threshold according to a target-actual measurement power difference, so that prediction and actual measurement are gradually fitted, and new prior is written back to a forward inference link; high-voltage overshoot and power failure of the whole row are avoided, a billing curve is completely matched with a charging curve, high turnover of a port can be kept in a passenger flow peak, the safety is integrally improved, the service life of hardware is prolonged, and the user experience is improved.

The invention discloses a mechanical loss detection method and device for motors. The mechanical loss detection method for the motors comprises the following steps: selecting two same motors as to-be-detected motors; providing a connecting piece, and coaxially connecting the two to-be-tested motors in series through the connecting piece; controlling one to-be-tested motor to be electrified and run, and driving the other to-be-tested motor to synchronously rotate and run; and respectively acquiring a power difference value and other operation loss values of the two motors to be tested, and calculating to obtain a mechanical loss value of each motor to be tested according to a preset relational expression of the power difference value, the other operation loss values and the mechanical loss values. Any two identical motors can be selected as the to-be-detected motors, a detection motor does not need to be additionally arranged in advance for detection, the rotating speed matching requirement of the detection motor is lowered, the mechanical loss value of the to-be-detected motors can be detected and determined conveniently and efficiently no matter how the rotating speed of the to-be-detected motors is, and the detection efficiency of the to-be-detected motors is improved. And the detection precision of the mechanical loss value can be improved.

The embodiment of the invention provides a method, a device and a system for compensating anode voltage and output power of a magnetron, and belongs to the technical field of radiators for microwave heating. The method comprises the following steps: acquiring a current temperature and an anode voltage measurement value of a magnetron; calculating a correction voltage according to the current temperature; determining a temperature change rate according to the correction voltage and / or the anode voltage measurement value; performing PID control on the PWM signal of the magnetron according to the temperature change rate and the target voltage value; judging whether the current temperature is within a safe working interval or not; acquiring a current anode voltage value when the current temperature is out of the safe working interval; calculating theoretical output power according to the anode voltage value; calculating a power difference value between the theoretical output power and the actual output power; judging whether the power difference value is greater than or equal to a difference value threshold value; and calculating a target voltage value according to the theoretical output power and the input power under the condition that the difference value is greater than or equal to the difference threshold value.

The invention relates to the field of wind power research, and discloses a wind power variable pitch and rotating speed cooperative control method, system and device and a medium, and the method comprises the steps: extracting operation space-time working condition characteristics in a target time window according to obtained operation state data and incoming flow environment data, and obtaining working condition space-time comprehensive characteristic indexes; calculating a unit working condition average power value corresponding to the target time window, forming a working condition level power feature set, and obtaining a working condition power difference index according to the dispersion degree of the data; performing feature matching on the obtained indexes, and calculating a cooperative control fusion weight on the basis of the basic weight of the variable pitch channel and the basic weight of the rotating speed or torque channel; and according to the power grid dispatching information and the unit control constraint condition, a cooperative control instruction is generated, and the wind generating set executes the cooperative control instruction to complete cooperative control of the variable pitch and the rotating speed. According to the method, under the condition that grid connection and safety constraints are met, power fluctuation and loads are reduced, variable pitch abrasion is reduced, and robustness is improved.

The invention discloses an active power control method for a flyback topology micro inverter system, and the method comprises the steps: calculating the load power of a load end through a current sampling module, and carrying out the uniform power distribution of a PV primary side branch when the load power is greater than or equal to the rated power of an inverter system; when the load power is smaller than the rated power of the inverter system, the PV primary side branch is closed step by step according to the load power difference; and when the load power is smaller than the minimum set power sum, one PV primary side branch is kept to operate. When the load power is smaller than the minimum set power, all the PV primary side branches are closed, and when the load power is larger than the minimum set power of the PV primary side branch with the lowest minimum set power, the system is started. According to the invention, multi-path regulation and control can be realized, and the control stability of the system is improved. And uniform distribution control, step-by-step adjustment distribution control, minimum power control and active power control are relatively flexible and efficient, so that the service life of the system is remarkably prolonged, and the reliability of the system is remarkably improved.

The invention discloses a power grid power compensation method, which is applied to a controller, and the controller is connected with a power compensation system. The power compensation system comprises a traction transformer and a converter. The converter is connected with the traction transformer through a first power supply arm and a second power supply arm of the traction transformer; the method comprises the following steps: acquiring a first power parameter of a first power supply arm, and acquiring a second power parameter of a second power supply arm; determining a power compensation parameter for performing power compensation on the first power supply arm and the second power supply arm under the condition of determining that a power adjustment condition is met based on the first electric power parameter and the second electric power parameter; the first power supply arm and the second power supply arm are subjected to power compensation based on the power compensation parameter and the converter, namely, the power difference between the two power supply arms (the first power supply arm and the second power supply arm) is adjusted through the calculated power compensation constant and the converter, so that the influence of unbalanced negative sequence voltage is reduced, and the power supply stability is improved.

The invention provides a virtual synchronous machine grid-connected control method and device and a readable storage medium, and relates to the technical field of electric power. The method comprises the following steps: calculating grid-connected active power and actual reactive power according to inverter parameters and power grid parameters of previous grid-connected control; determining the output voltage of the inverter according to the actual reactive power and the reference reactive power; inputting the grid-connected active power, the reference active power and the rated angular frequency into a first-order low-pass filtering module to obtain a frequency deviation and a frequency change rate, and adaptively adjusting the virtual inertia according to the power difference and the frequency deviation; updating the output angular frequency of the inverter according to the sum of the frequency deviation and the rated angular frequency; and performing voltage and current double-closed-loop control on the output voltage and the output angular frequency to obtain a modulated wave signal, and performing sine pulse width modulation based on the modulated wave signal to obtain a switching control signal of the inverter. Therefore, the active power oscillation is eliminated, the active steady-state deviation is reduced, and the frequency deviation and the frequency change rate are effectively inhibited.

The invention belongs to the technical field of flexible direct-current power transmission, and particularly relates to a sending-end bipolar converter control method and device and a computer readable storage medium. When the power requirements of receiving end power grids connected with receiving end current converters of two flexible direct current transmission poles are inconsistent and only one pole of receiving end power grid has a clear active power requirement, a control device of a sending end current converter of a pole where the receiving end current converter connected with the receiving end power grid with the clear active power requirement is located adopts PI control to calculate a frequency difference value; the control device of the transmitting-end converter of the other pole adopts active power-alternating current frequency droop control to realize active power differential control of the two-pole converter, so that the active power of the transmitting-end two-pole converter is distributed as required according to the active power requirement of the receiving-end power grid; flexible configuration of new energy active power is realized, a new energy station is prevented from being urgently cut off, and the effective utilization rate of new energy is improved.

The invention belongs to the technical field of inverter transient stability evaluation, and provides a power amplitude limiting setting method and system for improving the transient stability of a network construction device in current limiting. The method comprises the steps of triggering and controlling a grid-forming inverter to enter a current limiting mode when the grid-forming inverter grid-connected system has voltage drop at a power grid side, and limiting the increase of the power difference when the power difference exceeds the maximum value of the set power difference; the switching conditions are analyzed into corresponding power angle switching conditions; according to the power vacancy at the fault moment of the network-building type inverter, calculating the acceleration area of the network-building type inverter under the action of power amplitude limiting; on the basis of the relation between the fault clearing angle and the power angle switching condition of the network building type inverter, the deceleration area of the network building type inverter under the power amplitude limiting effect is obtained; and based on an equal area rule, solving a setting value range of a maximum value of a power difference value of power amplitude limiting under the condition of transient stability of the single-machine grid-connected system of the grid-forming inverter.

The invention provides a permanent magnet direct drive fan bus voltage oscillation suppression method after power grid fault recovery, and belongs to the technical field of permanent magnet direct drive fans. The technical problem of DC bus voltage oscillation after symmetric fault recovery is solved. According to the technical scheme, the method comprises the following steps that S1, the power difference value P between a computer side and a network side during a fault period and the maximum unbalanced power Pmax absorbed by the rotational inertia of a fan rotor are included, if P is smaller than or equal to Pmax, the step S2 is executed, and if P is larger than Pmax, the step S3 is executed; s2, controlling a direct-current bus voltage outer ring by a grid-side converter, and turning to S5; s3, a DC bus voltage outer ring is controlled by a fuzzy PI adaptive controller; and S4, carrying out fuzzy processing. According to the invention, adaptive adjustment of DC bus voltage outer loop PI parameters is realized, the dynamic response capability is enhanced, voltage oscillation is effectively suppressed, and the stability is improved.

The invention provides an anti-countercurrent control method and system based on load removal feature recognition, and the method comprises the steps: setting an anti-countercurrent power judgment threshold value and a feature signal capturing judgment threshold value, recording an event triggering moment, a power reduction starting moment and initial power when the power of a user home-entry gateway is lower than the feature signal capturing judgment threshold value, and recording the initial power of the user home-entry gateway; collecting voltage and current waveforms within a preset time span before and after a power reduction starting moment to form a load removal characteristic waveform, calculating a time difference value and a power difference value, and storing related data in a characteristic library; scanning the voltage and current waveforms of the home-entry gateway in real time, calculating the correlation between the real-time waveform and the waveforms in the feature library through a Pearson's correlation coefficient method, updating the credibility value and the application timestamp of the matched feature waveform when the correlation coefficient exceeds a threshold value, and updating the application timestamp when the credibility value reaches a set threshold value. And generating an energy storage system power suppression instruction based on the power difference value and the time difference value. According to the invention, economic loss and power supply enterprise fines caused by reverse power transmission can be reduced.

The invention discloses a voltage active support type energy storage networking control method and system, and belongs to the technical field of networking equipment control. The method comprises the following steps: acquiring an actually measured frequency, comparing the actually measured frequency with a reference frequency, and performing primary frequency modulation according to a comparison result; a synchronous generator rotor motion equation is simulated, virtual inertia and virtual damping are introduced in control, the virtual rotating speed of the energy storage converter is obtained, and then a virtual internal potential phase angle is obtained; generating a virtual voltage phase through power difference feedforward and PID control in response to power change; and performing dp conversion control according to the virtual internal potential phase angle and the virtual voltage phase to realize active voltage support. According to the method, the active supporting capability of the system is improved, and the dynamic stability of the system is improved.

The invention provides a hybrid energy storage cooperative control method and apparatus. The method comprises the steps of obtaining an actual value, a rated value and a frequency change rate of a power grid frequency; dynamically adjusting the initial virtual inertia coefficient by adopting an improved Sigmoid function based on the frequency change rate, and generating a dynamic virtual inertia coefficient; dynamically adjusting the initial droop coefficient by using the same function according to the deviation between the actual value and the rated value of the power grid frequency to generate a dynamic droop coefficient; calculating a power reference value of electrochemical energy storage according to the dynamic virtual inertia coefficient and the dynamic droop coefficient; based on the difference value between the power reference value and the power demand of the power grid, determining the number of weight blocks needing to be put into gravity energy storage; and controlling the gravity energy storage unit to output corresponding power according to the determined input quantity of the weight blocks so as to realize the stability of the power grid frequency. The core of the invention lies in determining the input amount of the weight block through the power difference value, thereby regulating and controlling the gravity energy storage output, and guaranteeing the stable power grid frequency.

The invention discloses an automatic generation control (AGC) operation method based on a gradient equidirectional distribution strategy. The method comprises the steps of receiving a set value of a control center, measuring actual generation power, judging a distribution mode, executing gradient equidirectional distribution, issuing a distribution instruction, monitoring an operation state and the like. The set value needs verification and format conversion, and the actual generated power is obtained by collecting electrical parameters and calculating. And determining to execute small load distribution or gradient equidirectional distribution according to a comparison result of the difference value between the set value and the actual generated power and a preset threshold value. The gradient same-direction distribution algorithm comprises the steps of determining participating units, calculating distribution units, calculating a proportionality coefficient and distributing a load value. The distribution instruction needs to be coded and is transmitted to the generator set control system through a special communication line. The operation state monitoring comprises the steps of collecting operation parameters and judging a parameter range, and triggering an alarm and adjusting if the range is exceeded. According to the invention, the response speed and stability of the power system can be improved, and the reliability and safety of power supply are ensured.

The invention relates to a three-phase four-bridge-arm flexible interconnection device and a switching control method, the three-phase four-bridge-arm flexible interconnection device in a back-to-back design is adopted, a main converter station adopts UdcQ control, a slave converter station adopts transient damping VSG control, a power difference value is obtained through a power instruction value and a feedback value of the slave converter station, and the three-phase four-bridge-arm flexible interconnection device and the switching control method are used for switching the three-phase four-bridge-arm flexible interconnection device. An engine power angle is obtained through a rotor mechanical equation, a function relation between the power angle and inverter output is obtained based on a linearization model, a VSG active loop closed-loop transfer function is obtained, a VSG signal model is established, and output power is controlled through an input power instruction and an input system frequency of the VSG signal model. When the operation mode of the flexible interconnection device is switched, smooth transition of voltage and current on the direct current side can be achieved, and inertia and damping support can be provided for a power grid during steady-state operation. Compared with the prior art, the method has the advantages of high stability, high reliability and the like.

A blower is provided. The blower includes a blower housing, a motor for driving a fan disposed within the blower housing, and a controller disposed in the blower housing and electrically coupled to the motor for controlling a power output of the motor. The controller is configured to perform a plurality of operations. The plurality of operations include receiving a power setpoint, receiving a measured power, comparing the power setpoint and the measured power to obtain a power difference, generating a control signal based on the power difference, and adjusting the power output of the motor based on the control signal.