1138 results about "Constant power" patented technology

The invention discloses a variable-frequency reconfigurable wireless electric energy transmission system and a parameter design method, and relates to a wireless electric energy transmission system and a parameter design method. The invention aims to solve the problems that the existing wireless power transmission technology is difficult to maintain approximately constant power transmission in the face of wider coupling coefficient fluctuation, and the system control complexity is higher at the same time. The system comprises a full-bridge inverter circuit, a primary side compensation network, a coupling coil, a secondary side compensation network and a rectification filter circuit. The input end of the full-bridge inverter circuit is connected with a direct-current voltage source UD, the output end of the full-bridge inverter circuit is connected with the input end of the primary side compensation network, the output end of the primary side compensation network is connected with the primary side input end of the coupling coil, and the secondary side output end of the coupling coil is connected with the input end of the secondary side compensation network. The output end of the secondary side compensation network is connected with the input end of the rectification filter circuit; the output end of the rectification filter circuit is connected with a battery load Ro. The invention belongs to the technical field of wireless power transmission.

The invention relates to the technical field of battery energy storage, and discloses a battery energy storage health state assessment method and system, and the method comprises the steps: analyzing the constant-power charging and discharging process of a lithium battery, and obtaining health factors highly related to the battery energy storage health state through Pearson correlation analysis; constructing a bidirectional long short-term memory network model, taking the health factor highly related to the battery energy storage health state as model input, and outputting an energy storage battery health state estimation value; and optimizing the bidirectional long-short-term memory network model by improving a Kepler optimization algorithm and introducing a differential evolution strategy. According to the invention, the improved Kepler optimization algorithm is combined with the bidirectional long short-term memory network (BiLSTM) and the attention mechanism (Attention), so that the accurate estimation of the health state of the battery energy storage system is realized, the safety and reliability of the battery management system are improved, the high-precision evaluation of the health state of the lithium battery is realized, and the reliability of the battery management system is improved. And the robustness and generalization ability of the model under complex working conditions are improved.

The invention belongs to the technical field of plasma sources, and provides a high-power high-stability remote plasma source fuzzy hysteresis control method and a circuit, when a reaction cavity is successfully ignited, a plasma source system is controlled to work at constant-frequency variable-duty-ratio constant-power output, and the method comprises the following steps: according to a sampled current value, a duty ratio, a predicted current value and a predicted duty ratio, calculating a constant-frequency variable-duty-ratio constant-power output value; respectively obtaining error control variables e and ec; the error control variables e and ec serve as input values of a fuzzy controller, and the actual control quantity hr output by the fuzzy controller is obtained; obtaining compensation variables # imgabs0 # and # imgabs1 # of the current and the duty ratio based on the error control variables e and ec; and taking the actual control quantity hr as the ring width value of a hysteresis comparator, and respectively compensating the current # imgabs4 # and the duty ratio # imgabs5 # at the moment k by outputting compensation variables # imgabs2 # and # imgabs3 # according to a preset rule. According to the method provided by the invention, a power window in a relatively wide range can be ensured, so that the working stability of the remote plasma source is improved, and the uniformity of a semiconductor manufacturing process is improved.

The invention discloses a variable-frequency reconfigurable wireless electric energy transmission system and a parameter design method, and relates to a wireless electric energy transmission system and a parameter design method. The invention aims to solve the problem that approximately constant power transmission is difficult to maintain in the prior art for relatively wide coupling coefficient fluctuation. The system comprises a full-bridge inverter circuit, a primary side compensation network, a coupling coil, a secondary side compensation network and a rectification filter circuit. The input end of the full-bridge inverter circuit is connected with a direct-current voltage source UD, the output end of the full-bridge inverter circuit is connected with the input end of the primary side compensation network, the output end of the primary side compensation network is connected with the primary side input end of the coupling coil, and the secondary side output end of the coupling coil is connected with the input end of the secondary side compensation network. The output end of the secondary side compensation network is connected with the input end of the rectification filter circuit, and the output end of the rectification filter circuit is connected with the battery load Ro. The invention belongs to the technical field of wireless power transmission.

The invention discloses a coordination control method for energy storage and a flexible multi-state switch in a power distribution network system, and relates to the field of power supply and distribution. The hierarchical control mode is adopted to coordinate the energy storage system and the flexible multi-state switch; the coordination control layer performs working mode selection and switching in a networking operation mode by a centralized controller according to the feeder load power, the charge state of a storage battery, the operation state of each transformer and the position and the number of feeder faults; the control strategy of the flexible multi-state switch can be changed among a constant DC voltage control strategy, a constant power control strategy and a droop control strategy; the control strategy of the storage battery can be switched among constant-current charging control, floating charging control and constant-voltage control; and the feeder load in the equipment control layer can also realize a load switching control strategy. By adopting the coordination control method, the power supply reliability and the power quality of the system can be improved.

The invention relates to an energy storage converter control method and system based on variable universe fuzzy PID. A double-second-order generalized integrator accurately tracks and locks a grid-connected voltage amplitude and a phase; the data acquisition module takes the deviation e and the deviation change rate ec as input signals; the control domain module obtains an input scaling factor alpha (x) and an output scaling factor beta (x) according to an input signal; and the fuzzy control module performs fuzzy domain processing on the input signal to obtain error values delta kp, delta ki and delta kd of PID parameters. And the PID control module adjusts the alternating current side power. Through the arrangement, the phase and the amplitude of the power grid are accurately locked by adopting the double-second-order generalized integrator phase-locked loop, and meanwhile, the output power of the energy storage system is quickly adjusted to tend to a stable value. And meanwhile, adaptive adjustment of PID parameters is realized by applying a fuzzy reasoning method, dynamic and stable control of the power grid in a complex environment is realized by using fewer parameters, and a constant-power discharge effect of the energy storage system is realized.

A state of power (SOP) measurement technique includes determining an initial power command corresponding to a potential SOP of a battery system and performing an iterative power command searching process including charging the battery system to a fully-charged state of charge (SOC), discharging the battery system to a set of SOC breakpoints until the battery system reaches a fully-discharged SOC, after reaching each SOC breakpoint, applying a power command as a constant power pulse to the battery system, the power command being the initial power command or a subsequently updated power command, and based on whether a current or voltage of the battery system exceeds an error tolerance, updating the initial power command and repeating the iterative power command searching process, or outputting the initial power command or the subsequently updated power command as a measured SOP of the battery system.

The invention relates to the technical field of ship propulsion power generation system control, in particular to a constant-power rotating speed control method and system for a ship shaft generator, and the method comprises the following steps: obtaining operation state parameters and ship environment parameters of a ship propulsion power generation system; based on the operation state parameters and the ship environment parameters, the influence of the adjusting action of the shaft generator on the rotating speed of a main propulsion diesel engine and the influence of the adjusting action of a main propulsion diesel engine speed adjusting device on the output power of the shaft generator are pre-judged, and an interactive pre-judgment result is obtained; according to the interactive pre-judgment result, jointly deciding and generating a first adjusting instruction for adjusting an axle generator and a second adjusting instruction for adjusting a main propulsion diesel engine speed adjusting device; by introducing an interactive pre-judgment and joint decision-making mechanism, the negative interaction between the shaft generator and the main propulsion diesel engine speed regulation device can be effectively identified and eliminated, and the operation stability and safety of the ship under the severe sea condition are improved.

The invention discloses an ECPT system based on a bilateral LC and bilateral LCLC hybrid compensation network, and relates to the technical field of wireless electric energy transmission, the ECPT system comprises an electric energy transmitting end and an electric energy receiving end, two sets of coupling mechanisms of which the cross coupling capacitance can be neglected respectively use bilateral LC and bilateral LCLC topologies for compensation, and the two are connected with an inverter and a load through series input and series output combination. The bilateral LC compensation topology and the bilateral LCLC compensation topology both adopt constant current mode matching, the system can achieve the constant current output characteristic irrelevant to the load, and due to the fact that the output characteristics of the two compensation topologies and the coupling mutual capacitance CM are in a complementary relation, the system can basically achieve constant power output under the change of the coupling mutual capacitance CM. And good anti-coupling mechanism deviation performance is shown.

The invention discloses an ignition control method of a remote plasma source in the technical field of remote plasma sources, which comprises the following steps: S1, setting a gas current excitation threshold value, and introducing excitation gas; s2, judging whether an ignition signal is received or not, and if yes, closing a relay and entering a constant current stage; s3, whether system ignition is normal or not is judged, and if not, the ignition voltage is adjusted through a self-learning type ignition threshold value calibration method; s4, the output power is improved, and the ignition voltage is adjusted through an ignition threshold calibration method during the period; s5, entering a constant power stage when the output power reaches the full-load power; according to the self-learning type ignition threshold value calibration method, gas flow, gas pressure and cavity temperature are collected in real time, a current load impedance value is predicted through an LSF-BP model, and an ignition voltage threshold value is updated according to the current load impedance value. According to the method, the ignition threshold is dynamically adjusted according to the operation condition, the ignition stability can be effectively improved, and equipment damage and maintenance cost are reduced.

The invention discloses a short-circuit current limiting and short-circuit recovery transient voltage control device and method for an aviation three-stage power generation system, and the device comprises a three-stage power generator, a power generator controller, a current sensor, a voltage and current collection module, and an asymmetric half-bridge excitation control circuit. Collecting the output current iL and voltage UL of the generator through a digital processor of the generator controller; when short circuit occurs, the given voltage USet of the voltage regulating loop is linearly reduced in a piecewise mode according to the relation between the iL and a preset threshold value, so that the generator works in a constant power interval; and when the short circuit is recovered, closing the upper / lower power tubes of the asymmetric half-bridge excitation control circuit according to the relationship between UL and a preset threshold value in a grading manner, and triggering a negative-pressure follow-current mode of a main excitation winding of the generator controller to quickly extinguish the field. The method can adapt to different generators without adjusting hardware circuit parameters, has no motor ablation risk during short circuit, has transient voltage less than 350V after short circuit recovery, has no power supply interruption in the whole process, has response delay less than 1ms, and greatly improves the safety and robustness of an aviation power supply and distribution system.

The invention discloses a power supply method, a power supply system and a cabinet, the method is applied to the power supply system, the power supply system comprises a PSU and an explosion power supply module, both the PSU and the explosion power supply module are connected with a bus of the cabinet, and the method comprises the following steps: detecting the state of the cabinet where the power supply system is located; and when the state shows that the cabinet has a transient power supply event, triggering the PSU and the explosion power supply module to supply power to the cabinet in a coordinated manner according to a transient power supply demand. The explosion power supply module is additionally arranged in the power supply system in the cabinet, and when the PSU supplies power to the cabinet at constant power, the explosion power supply module connected with the bus can obtain electric energy and store the electric energy. When a transient power supply event occurs in the cabinet, the explosion power supply module quickly supplements the electric energy required by the cabinet to supply power to the cabinet, so that the transient power supply requirement of the cabinet is met. Therefore, the power supply reliability of the cabinet when the transient power supply event occurs in the cabinet is improved.

The invention discloses a magnetic adjusting assembly, a motor, an electric drive system and a vehicle, and the magnetic adjusting assembly comprises a magnetic conductive part which is suitable for being movably disposed on one side of a rotor in the radial direction, so as to adjust the magnetic flux passing through the rotor. According to the magnetic adjusting assembly, the magnetic flux passing through the rotor is adjusted to change the magnetic flux of the magnetic flux short-circuit loop formed by the magnetic conductive piece and the rotor, so that the adjustment of the magnetic flux of the main magnetic field is realized, the adjustment is convenient, and the motor applying the magnetic adjusting assembly has the advantages of a constant torque area and a constant power area; and a constant-power operation region and a high-efficiency region are effectively widened while high torque density and power density are ensured.

The invention relates to the technical field of battery thermal performance measurement, in particular to a method for measuring the specific heat capacity of an energy storage battery. The theoretical model is calibrated by monitoring the cooling curve of the battery so as to ensure that the heat transfer characteristic of the battery is accurately reflected. Then, constant-power heating is adopted, so that the thermal field of the battery reaches a quasi-steady state, and in the steady state, the temperature change is gradually consistent; and recording a temperature change curve in real time through a temperature acquisition instrument, and calculating the specific heat capacity of the battery in combination with the calibrated model and a constant power input condition. According to the method, only the voltage-stabilized power supply and the temperature acquisition instrument are needed, so that the cost is greatly reduced; the measurement precision is improved through temperature change curve analysis after model calibration, and the problems that in a traditional method, environmental interference is large, and precision is insufficient are solved; the time for reaching the quasi-steady state is shortened through constant-power heating, and the measurement process is accelerated. The method is suitable for various energy storage batteries, can meet the requirements of industries such as electric automobiles and electric energy storage on the thermal performance of the batteries, and has wide popularization value.

The invention discloses a converter grid following-grid construction control mode smooth switching method suitable for wide-range source-grid state change. The method comprises the following steps: constructing a phase-locked loop control loop, a power outer loop control loop and a current inner loop control loop of a grid following type converter based on constant power control; constructing a voltage control loop, a phase control loop and a voltage and current double-closed-loop control loop of the network construction type converter based on the virtual synchronous generator VSG; calculating real-time output active power P and reactive power Q of the converter; constructing a voltage phase synchronization loop switching control loop and a current instruction tracking loop, and realizing smooth switching of dq-axis current instruction values output by a power outer loop of a following network type and a voltage outer loop of a construction network type; and the output dq-axis current instruction value is transmitted to a current inner loop to generate a final voltage signal, and a PWM wave is output to the converter through a modulation link. According to the method, a voltage phase synchronous switching compensation mechanism is adopted, a voltage amplitude and a phase signal are synchronously corrected in the mode switching process, and smooth change of an inner ring current reference signal is achieved.

The invention provides a constant-power load analog circuit, a constant-power adjusting method and a rack-mounted load box, and belongs to the field of rack-mounted load boxs.The analog circuit comprises a rectifying circuit, a diverter, a power module, a fan module and a control and drive circuit, and the power module comprises at least one heating tube and at least one transistor. The control and drive circuit comprises a main control circuit, a voltage signal processing circuit, a current signal processing circuit, a power setting and display module and at least one IGBT drive circuit, the base electrode of the transistor is connected to the main control circuit through the IGBT drive circuit, and the power setting and display module is connected to the main control circuit and used for inputting a set power value. The main control circuit collects voltage and current of an external power supply, calculates a rated power value, calculates a signal duty ratio according to a set power value and the rated power value, outputs a PWM wave, controls on or off of a transistor through the IGBT driving circuit, dynamically adjusts actual output power of the load simulation circuit to be consistent with the set power value, and controls the load simulation circuit to work. And the power regulation precision of the load box is improved.

The invention provides a constant-power driving method of a light source, a light source driver and an air conditioning system, and the constant-power driving method comprises the steps: determining an equivalent voltage corresponding to the power of the current light source based on the working current and working voltage of the current light source obtained in real time; performing differential amplification processing on the equivalent voltage and the expected voltage to generate a constant power modulation instruction of the light source; the expected voltage is a constant voltage simulated according to the rated power of the light source; driving power of the light source is generated based on a constant power modulation instruction of the light source and a feedback adjustment instruction, the driving power is amplified by using a preset power amplification coefficient, the amplified driving power is used for driving the light source to emit light, and the feedback adjustment instruction is generated based on sampling feedback of the driving power of the amplified light source. The constant-power driving of the light source is adopted, so that the service life, the precision and the response speed of the light source are ensured.

The utility model discloses a constant power controller with pressure control for a high-pressure plunger pump, which comprises a shell, a variable piston is arranged in the shell, a return spring connected with the shell is arranged at the small end of the variable piston, a shifting block rotationally connected with the shell is arranged on the radial side of the variable piston, and a power control valve is arranged on one side of the shifting block. A variable supporting column extending towards the shifting block is arranged on the variable piston in the radial direction, a guide hole is formed in the end face of the variable supporting column, the bottom face of the guide hole is communicated with the small end of the variable piston, a variable plunger is arranged in the guide hole and comprises a plunger body and a sliding shoe, the plunger body is in sliding connection with the variable supporting column, and one side of the sliding shoe is in spherical hinge joint with the plunger body. And the other side of the sliding shoe is in surface contact with the shifting block. The utility model has the advantages of longer service life and higher constant power control precision.

An automatic lock is disclosed. The lock can use a constant power spring to automatically lock itself when unlocked. The door lock can comprise a motor configured to charge a capacitor when a battery is depleted. The door lock can comprise a spindle extending from an exterior portion of the door lock to an interior portion of the door lock, mechanically linked to a key arm and a latch. When engaged, the key arm can allow the spindle to be turned by the exterior knob without actuating the latch, when disengaged, the key arm can allow the spindle to be turned by the exterior knob and actuate the latch.

The invention discloses a shutdown discharge method for an all-vanadium redox flow battery system. The all-vanadium redox flow battery system comprises an all-vanadium redox flow battery, a battery management system and an energy storage converter, the all-vanadium redox flow battery comprises a galvanic pile, an electrolyte, an electrolyte circulating pump and positive and negative storage tanks, the battery management system and the energy storage converter are independently and electrically connected with the all-vanadium redox flow battery; the battery management system is in communication connection with the energy storage converter through a communication protocol; after the all-vanadium redox flow battery system is shut down, when the SOC value of the all-vanadium redox flow battery is smaller than SOC3, shutdown discharging is not needed; and when the SOC value of the all-vanadium redox flow battery is greater than or equal to SOC3, the battery management system issues a discharging instruction to control the energy storage converter to discharge at constant power until the voltage of the all-vanadium redox flow battery is reduced to cut-off voltage V, and the battery management system issues a discharging stopping instruction to control the energy storage converter to stop discharging.

The invention discloses a wireless electric energy transmission system with a reconfigurable topology, and relates to the technical field of wireless electric energy transmission. In order to solve the technical problems that in an existing IPT technology research, in the face of wide coupling coefficient fluctuation, nearly constant power transmission cannot be maintained, and meanwhile, the system control complexity cannot be reduced, the technical scheme provided by the invention is that the wireless electric energy transmission system with the reconfigurable topology comprises a wireless electric energy transmission module and a wireless electric energy transmission module, comprising a full-bridge inverter circuit, a primary side compensation network, a coupling coil, a secondary side compensation network and a rectification filter circuit. The input end of the full-bridge inverter circuit is connected with a direct-current voltage source UD, the output end of the full-bridge inverter circuit is connected with the input end of the primary side compensation network, the output end of the primary side compensation network is connected with the primary side input end of the coupling coil, and the secondary side output end of the coupling coil is connected with the input end of the secondary side compensation network. The output end of the secondary side compensation network is connected with the input end of the rectification filter circuit; the output end of the rectification filter circuit is connected with a battery load Ro. The system is suitable for wireless electric energy transmission work.

A DC electronic load circuit relates to the technical field of electronic load control. The utility model provides a direct current electronic load circuit which integrates a dissipation MOS tube array, an analog PID loop, a digital integrated control module, a bus electrical parameter sampling and processing module and a WiFi communication module, and realizes a plurality of working modes such as constant current, constant voltage, constant resistance and constant power by accurately controlling the conduction degree of the MOS tube array. The system has the advantages of real-time monitoring, remote control, overvoltage and overcurrent protection, low power consumption design and the like, and an electronic load solution which is high in precision, high in stability and flexible to operate is provided, so that diversified test requirements are met, and the power supply test efficiency and safety are improved.

The invention discloses a flexible interconnection photovoltaic transformer area global optimization regulation and control method based on sequential quadratic programming, and the method comprises the steps: selecting a DC port of a current converter, employing a constant voltage control strategy for maintaining the voltage stability of a DC bus, and employing a constant power control strategy for the DC ports of the remaining transformer area current converters; reading data information of the transformer area, generating real-time data, and performing derivation and back substitution processes on nodes of the multi-distribution transformer area flexible interconnection system to obtain final power flow information; calculating power loss on the direct current bus by using the power transmission loss coefficient, and obtaining constraint conditions between power; and S3, optimizing the power loss in the step S3 by using an SQP optimization algorithm to obtain a power control instruction of the multi-distribution transformer area flexible interconnection system, and completing regulation and control optimization. According to the invention, the maximum consumption of photovoltaic resources is realized, and the voltage of each node is regulated and controlled to a certain extent through active-reactive coordinated voltage regulation.

According to the current-limiting circuit and the linear voltage regulator for achieving constant power control, after the current of a power tube Ppower tube of a mirror image LDO circuit of a detection tube is compared with a set current-limiting threshold, an output signal pulls up the grid electrode of the Ppower tube to reduce output current, so that output current-limiting control is achieved, and when Vin rises, the output current-limiting control is achieved through the channel length modulation effect of the detection tube and the power tube. And the rated current limiting value is reduced, so that constant power control is realized when the input and output voltage difference of the LDO circuit is increased. Meanwhile, in order to avoid the influence of different Vout on the current limiting value, a Vout clamping circuit is adopted, the drain electrode potential of the Ppower and the drain electrode potential of the detection tube are approximately the same, and the current limiting difference caused by the change of the Vout is avoided. According to the circuit, current limiting and channel length effect differences are combined, as Vin rises, the current rising proportion of the detection tube is larger than that of the power tube, current limiting protection is started in advance, the output current is reduced, the constant power effect is achieved, power rising of the power tube along with Vin rising is avoided, and risks caused by heating when the power is large are reduced.

The invention provides a method for calculating the running stroke frequency of a pumping unit in a constant power mode and a method and device for controlling the pumping unit. The method comprises the following steps: acquiring production data of a sucker-rod pump producing well and basic parameters of a pumping unit; identifying that the working condition of the sucker-rod pump oil extraction system is normal according to the production indicator diagram; drawing a net torque curve in combination with basic parameters of the oil pumping unit; the average output power of the oil pumping unit in one swabbing period of the oil well pump is calculated based on the stroke frequency and the net torque curve; and the stroke frequency corresponding to each crank rotation angle in one swabbing period of the oil well pump is calculated based on the average output power of the oil pumping unit and the net torque curve. According to the invention, real-time dynamic optimization is carried out on the production working condition of the pumping unit, and constant power mode operation of the pumping unit is realized.

The invention relates to the technical field of grinding control, in particular to a constant-power grinding control method, system and equipment of a numerical control grinding machine. According to the method, in a preset historical time period of a to-be-regulated moment, a time sequence curve of the deviation of the grinding power of the numerical control grinding machine relative to the preset grinding power is obtained and subjected to time sequence decomposition, and then proportional gain in PID control parameters is obtained according to the change trend of a trend component and the power deviation at the to-be-regulated moment in the trend component; obtaining an integral gain in the PID control parameters according to the periodic fluctuation characteristics of the seasonal components; according to the change trend of the time sequence curve and the fluctuation characteristics of the residual component, and in combination with the proportional gain and the integral gain, obtaining the differential gain in the PID control parameters; and finally carrying out constant-power grinding control on the numerical control grinding machine. The PID control parameters are adaptively adjusted based on the time sequence decomposition result of the power deviation, and the constant power control effect on the numerical control grinding machine is improved.

A method for Field Oriented Control (FOC) of a Permanent Magnet Synchronous Motor (PMSM) with a constant Power Factor Control (PFC) Loop includes measuring a rotor position of the PMSM. A plurality of stator voltages of the PMSM is controlled with a required direct (d)-axis current, a required quadrature (q)-axis current, the rotor position and a plurality of measured stator currents of the PMSM in a three-phase stationary reference frame. The required d-axis current is determined with a required power factor, the plurality of measured stator currents transformed into two-phase stationary reference frame, the measured stator currents transformed into a rotational reference frame, and each of a required α-axis voltage and a required β-axis voltage transformed into the two-phase stationary reference frame, wherein a power factor of the PMSM is controlled to be equal to the required power factor.

The invention discloses an MPC-SP-based all-vanadium redox flow battery constant-power charging and discharging control method, which is applied to an energy storage control system composed of an MPC-SP controller, a PCS and an all-vanadium redox flow battery, and is characterized in that the controller dynamically and accurately adjusts the power output to the battery based on preset SOC interval division, and the power output to the battery is increased along with the increase of the actual SOC value of the battery. The power is increased in stages. Meanwhile, the controller pays attention to the voltage Ud of the battery end all the time, and when the Ud reaches a voltage limiting value, the constant voltage mode is switched, so that the battery is effectively prevented from being damaged due to overhigh voltage. The state-based dynamic power management is much safer, more flexible and more intelligent than traditional fixed constant power control. According to the invention, the change rate of current in the charge-discharge process of the all-vanadium redox flow battery can be reduced, the service life of the battery is prolonged, and the safety is guaranteed.

The invention discloses a virtual impedance compensation-based active-disturbance-rejection control method for a dual-active-bridge converter, and the method comprises the following steps: firstly designing a virtual impedance compensation strategy, connecting an equivalent virtual conductor in parallel with an output capacitor, converting the equivalent virtual conductor into a duty ratio injection amount, and achieving the active counteracting of the negative impedance of a constant-power load and the reconstruction of the damping of a port; an unstable pole of the right half plane is made to move back to the left half plane, and extra power loss is not introduced; an active disturbance rejection control strategy based on virtual impedance compensation is designed, residual uncertainty after virtual impedance compensation is uniformly regarded as total disturbance online observation and feedforward offset, and therefore rapid and smooth voltage tracking is kept under parameter perturbation and external disturbance. Under the working conditions of voltage reference step and load abrupt change, the improved active disturbance rejection control strategy realizes the effects of no overshoot, shortest setting time and minimum oscillation by enhancing disturbance observation and virtual impedance compensation, and has better damping and disturbance rejection performance.

The invention relates to the technical field of micro-grids, and discloses a control method of a distributed power supply in a plant micro-grid, and the method comprises the steps: S1, constructing a multi-source collaborative micro-grid system; s2, executing real-time power dynamic allocation; s3, working condition power balance control; s4, active regulation of bidirectional power flow and the like. Based on a real-time AGC instruction and plant load data, a hierarchical coordination mechanism is adopted, charging and discharging power is dynamically adjusted by means of stored energy to track the AGC instruction, and constant power output of wind power is maintained in combination with a wind power prediction model; when a thermal power generating unit is subjected to deep peak regulation, shutdown or fault, the system absorbs excess wind power through energy storage charging, synergistically improves the hydrogen production load power, guarantees dynamic matching of the load and power generation, and actively adjusts energy storage charging and discharging and hydrogen production loads by monitoring the power flow directions of a thermal power generating unit section and a desulfurization section in real time according to voltage fluctuation caused by bidirectional power flow. And the voltage deviation is dynamically compensated, and the system voltage stability is greatly improved.