66 results about "Power absorption" patented technology

The invention belongs to the technical field of electromagnetic wave-absorbing materials, and particularly relates to a zero-power absorption type adjustable metasurface composite material and a preparation method thereof. Comprising a panel, a square-ring-shaped metal layer, a cross-shaped metal layer, an electric control metamaterial, a resistive film and a reflecting back plate from top to bottom in sequence, a core layer is arranged among the square metal layer, the cross curve metal layer, the electric control metamaterial, the resistive film and the reflecting back plate; the electric control metamaterial comprises second structure units which are periodically arranged along x and y directions and contain PIN diodes, and the PIN diodes are embedded into the structure; the cross curve metal layer and the square metal layer respectively comprise a third structure unit and a fourth structure unit which are periodically arranged along the x direction and the y direction. Through a cascade structure formed by the electric control metamaterial, the cross-shaped metal layer and the square ring-shaped metal layer, when the PIN diode is switched off, the wave absorbing state is presented, when the PIN diode is switched on, the reflecting state is presented, and electromagnetic waves are absorbed under the condition that bias voltage is not applied.

A test method of gasoline engine generator set on engine test bench belongs to the technical field of engine test. The general engine test bench is reversibly and modularly transformed. The original power absorption device, the control and measurement industrial computer, the thermal / NVH collection system and the INCA computer are retained. The rectification, power measurement, adjustable electric load and oil consumption instrument device are newly added. The control system is reconstructed in double modes. The generator set test mode is added and the control function of the power absorption device is shielded. The speed / torque closed-loop control logic taking the adjustable electric load as the regulated variable is established. Relying on the synchronous collection of the unified clock, the microsecond time stamp alignment collection of the oil consumption, thermal, power, NVH and AC / DC electric performance of the generator set is realized. The test is carried out by reusing the extreme environment simulation system of the test bench. The transformation is reversible and non-damaging, does not affect the original function, can greatly reduce the equipment investment, improve the utilization rate of the test bench and provide support for the performance optimization of the generator set.

The composition includes a thermoplastic resin comprising a polypropylene polymer and about 0.15% to about 4.75% by weight of a filler comprising carbon nanotubes. The carbon nanotubes have an average diameter of about 5 to 15 nanometers (nm) and a density of at least about 100 square meters per gram (m 2 / gr) surface area, and 10 -3 The composition has a volume resistivity of 0.01E+1.0 Ohm.cm or less. The composition exhibits a volume electrical resistivity of 2.0E+14 Ohm.cm to 1.0E+03 Ohm.cm, and molded samples of the composition exhibit a percent power absorption of at least 65% measured in transmission mode at frequencies of about 75 GHz to about 110 GHz. Molded articles containing micron-sized features that provide the article with high absorption and low reflection properties are also described.

The invention discloses a full-direct-current offshore wind power system zero-voltage ride-through method, equipment and a medium, and relates to the field of full-direct-current offshore wind power. The objective of the invention is to solve the problem that a receiving-end converter station cannot transmit power when a land AC power grid breaks down. When the high-voltage direct-current voltage of the offshore direct-current transformer exceeds the first preset threshold value, the medium-voltage direct-current voltage control of the offshore direct-current transformer is switched to the high-voltage direct-current voltage control, so that the offshore direct-current transformer absorbs power from a high-voltage direct-current link; when the medium-voltage direct-current voltage of the fan direct-current transformer exceeds a second preset threshold value, the fan direct-current transformer is switched from low-voltage direct-current voltage control to medium-voltage direct-current voltage control, so that the fan direct-current transformer can absorb power from the low-voltage direct-current voltage side through a fan grid-side direct-current transformer; and when the low-voltage direct-current voltage of the offshore direct-current transformer exceeds a third preset threshold value, the brake resistor is activated to dissipate surplus power until the low-voltage direct-current voltage is lower than a fourth preset threshold value.

This invention discloses a transient control method for a wind turbine grid-connected system that utilizes a reverse energy absorption branch, relating to the field of new energy technology. The energy-consuming branch is connected in parallel to the DC bus capacitor. The grid connection point voltage and DC bus voltage of the wind turbine grid-connected system are acquired. When the grid connection point voltage reaches a preset condition, a reference value for the d-axis current of the grid-side converter is calculated based on the grid connection point voltage and the voltage of the DC bus capacitor. Based on the reference value, the active power state of the grid-side converter is switched to an active power absorption state, allowing the DC bus capacitor to store electrical energy and raise the voltage. When the voltage of the DC bus capacitor is greater than the threshold voltage of the transistor, the transistor is controlled to be in the conducting state. Through this technical solution, the direction of energy flow on the DC bus between the turbine-side converter and the grid-side converter can be changed. Furthermore, by consuming excess energy through resistance, wind turbine output oscillations and DC-side overvoltage can be suppressed, and the synchronous stability of the wind turbine grid-connected system can be improved.

The invention discloses a direct-current converter for oscillation suppression and surplus power absorption and a control method thereof, and relates to the technical field of direct-current power transmission and distribution, a function module unit is formed through the parallel design of an oscillation suppression subunit and a power absorption subunit, and then a function module is formed through cascading the function module unit. And the function module and the starting module are connected in series to form the direct-current converter for oscillation suppression and surplus power absorption. By adopting the embodiment of the invention, accurate suppression of direct current voltage oscillation and efficient absorption of surplus power can be integrated, and safe, stable and reliable operation of a direct current power transmission and distribution system is ensured while hardware cost and space occupation are reduced.

The invention discloses a frequency cooperative control system, method and device for a flexible interconnection low-voltage power distribution network and a medium, and belongs to the technical field of flexible interconnection power distribution networks, and the method comprises the steps: building an equivalent circuit model of the DC side of a multi-end feed-in flexible hub switch, calculating the impedance analytical expression of each converter and DC capacitor, and calculating the impedance analytical expression of each converter and DC capacitor; obtaining a quantitative index for measuring the stability margin of the direct current side of the system; if not more than 0, positioning a direct current side unstable link and optimizing control parameters of the direct current side unstable link; if gt; and if yes, completing the parameter design, and applying the control parameter to the frequency cooperative control of the flexible interconnection low-voltage power distribution network. According to the method, the internal interaction stability of the device is evaluated by constructing quantitative indexes, weak links of the stability can be positioned, control parameters are optimized in a targeted manner, and the overall operation stability is effectively improved; meanwhile, when frequency deviation occurs in the power distribution network on one side, power absorption or release of the internal energy storage device can be regulated and controlled on the premise that normal operation of the power distribution network on the other side is not interfered.

This invention relates to the field of pumped storage technology, and discloses a method, device, medium, and product for joint regulation and control of pumped storage units. The method includes: acquiring the rated power value, variable speed operation power adjustment range, and hydraulic short-circuit operation power adjustment range of the pumped storage unit to be controlled; upon receiving the power absorption value from the power grid dispatch system, determining a first ratio between the power grid dispatch absorption power and the rated power value; acquiring the maximum variable speed operation power value based on the variable speed operation power adjustment range, and determining a second ratio between the maximum variable speed operation power and the rated power; and determining the target operating mode of the pumped storage unit to be controlled based on the first ratio, the second ratio, the variable speed operation power adjustment range, and the hydraulic short-circuit operation power adjustment range, and controlling the operation of the pumped storage unit. Therefore, by implementing this invention, considering the hydraulic short-circuit operation mode, continuous regulation of absorbed power across the entire power range is achieved.

The invention discloses an energy storage method, system, equipment and medium for quick start and wide load operation, and relates to the technical field of energy storage, and the method comprises the steps: controlling a first energy storage unit to be connected with a grid preferentially to realize quick response, and starting a compressed air energy storage unit at the same time. After load switching, when the system needs to operate below the safety boundary, the first energy storage unit absorbs power, and the low-load operation capacity of the system is cooperatively expanded. According to the invention, second-level quick start of the energy storage system is realized, and the emergency response requirement of a power grid is met. According to the method, by presetting the safe operation boundary and adopting the cooperative control strategy, the technical problems that the minimum output limitation of a traditional compressed air energy storage system is strict, and the low-load peak regulation capacity is insufficient are solved, and the load regulation range of the system is greatly widened. Therefore, the energy storage system not only can provide rapid frequency support, but also can carry out safe deep peak regulation, and the support capability and the operation flexibility of a power grid are remarkably improved.

A new circuit element is introduced which is a regulated power source (RPS) capable of delivering a controlled power into an uncontrolled load. In a first embodiment, a switching power supply controls power delivery rate by setting a peak inductor current or by controlling switching frequency. In a second embodiment, an analog multiplier circuit is placed into a feedback loop of an operational amplifier so power is delivered or absorbed responsive to a power control signal. Applications that exist for a first RPS embodiment include maintaining a solar panel at its MPP (maximum power point), combining the DC outputs of solar panels receiving unequal illumination, transfer of power to batteries or inverters and energy transfer using timed power delivery. Applications for a second embodiment also include temperature control and high bandwidth AC and DC precision power sourcing and sinking.

The invention relates to a load modulation balance power amplifier circuit, which belongs to the technical field of wireless communication, and comprises a first bridge and a circulator, one end of a phase impedance adjusting line is connected with a first bridge straight-through port, and the other end of the phase impedance adjusting line is connected with a third port of the circulator; one end of the impedance adjusting line is connected with the first bridge coupling port, and the other end is connected with the circulator first port; one end of the phase adjusting line is electrically connected with the circulator second port, and the other end serves as a circuit output end; the input end of the power divider serves as a circuit input end; the input end of the main power amplifier is electrically connected with the first output port of the power divider; the input end of the auxiliary power amplifier is electrically connected with the second output port of the power divider; one end of the impedance conversion line is electrically connected with the main power amplifier output end, and the other end is electrically connected with the first bridge isolation port; the output end of the auxiliary power amplifier is electrically connected with the input port of the first bridge. A power absorption load does not need to be arranged, the circuit area and cost are saved, higher power back-off efficiency is achieved, and the transistor can be protected.

The invention provides a symmetrical half-bridge-based power decoupling topology and a control method thereof.The symmetrical half-bridge-based power decoupling topology comprises a bus capacitor, a power absorption unit, a decoupling unit, a sampling unit and a control unit; the output end of the bus capacitor is connected with the input end of the power absorption unit, and the output end of the power absorption unit is connected with the decoupling unit; the input end of the sampling unit is connected with the bus capacitor, the feedback end of the sampling unit is connected with the input end of the control unit, and the output end of the control unit is connected with the input end of the power absorption unit. The power decoupling circuit used in the invention can be ensured to be stable under various working conditions, the double frequency ripple absorption of the bus can be realized, and the design and the control method of the invention show better stability.

The present application relates to a method for refining the size of potassium bubbles in W-K alloy rods by electron beam heat loading, comprising the following steps: (1) cutting the W-K alloy rods into samples with a thickness of not more than 1 mm, and polishing the samples to make the sample surface smooth and bright; (2) placing the samples obtained by step (1) in an electron beam device for cyclic electron beam heat loading treatment, wherein the absorption power density of the electron beam heat loading is 10-20 MW / m 2 and the scanning frequencies of the electron beam in the x direction and the y direction are 35 kHz and 26 kHz respectively. The present application refines the tubular potassium bubbles in the W-K alloy to a nanoscale row distribution by applying an electron beam heat load with a suitable power density. The purpose of refining the potassium bubbles is achieved without changing the microstructure of the tungsten matrix, and the overall mechanical properties of the material are improved.

The application provides a grid-connected device control method and system, a grid-connected device and a medium. The method comprises the following steps: acquiring a first grid-connected point voltage; when the first grid-connected point voltage enters a preset low penetration buffer interval or a preset high penetration buffer interval, adjusting the active power or the reactive power of the grid-connected device according to the priority mode configuration and the device attribute parameters of the grid-connected device to obtain a second grid-connected point voltage. When the second grid-connected point voltage enters a low penetration interval or a high penetration interval, the priority mode configuration is adjusted to a reactive power priority mode, and reactive power absorption is performed to obtain a third grid-connected point voltage. When the third grid-connected point voltage is greater than a preset low penetration threshold or less than a preset high penetration threshold, the priority mode configuration is adjusted to an active power priority mode. In this way, the problem of power oscillation caused by frequent fluctuations of the grid-connected point voltage at the high and low penetration thresholds is avoided, and the safety of the power grid and the grid-connected device is effectively ensured.

The application discloses a power grid residual power distributed absorption regulation method based on a private charging pile group, relates to the technical field of private charging piles, and generates an absorption input set Dat through a cloud regulation platform; performs heterogeneous identification and target screening on the private charging pile group to generate a heterogeneous candidate set Can; when a residual power absorption triggering condition is met, the absorption input set Dat and the heterogeneous candidate set Can are input into a pre-trained deep reinforcement learning model to generate a path absorption strategy Map, and a control group is formed and a control group cooperative execution sequence is formed; an edge computing node issues specific execution instructions according to the control group cooperative execution sequence, and the cloud regulation platform performs rolling correction, supplementary control and result reporting. The demand side response scheduling instruction can be directly converted into an equipment side executable strategy, and the response speed, residual power absorption efficiency and regulation precision of the heterogeneous private charging pile group are improved.

To perform power supply and absorption with a system for power system stabilization, efficiently and at low costs.SOLUTION: An arrangement (1) connectable to an alternating current power transmission system (2) comprises a static synchronous compensator device (3) having a converter unit (4) and an energy storage unit (5) connected with the converter unit; a power absorption device (6); and a control device (9) connected with the static synchronous compensator device and with the power absorption device. The control device controls the static synchronous compensator device to exchange power with the alternating current power transmission system, controls the power absorption device in dependence of a charge state of the energy storage unit and a state of the power transmission system, further determines whether or not there is a need to absorb active power from the AC power transmission system in excess of what the static synchronous compensator device is currently absorbing and, in the case of such a need, controls the power absorption device to absorb active power.SELECTED DRAWING: Figure 1

The invention relates to a multi-machine parallel seamless switching diesel generating set system which comprises a common bus, a direct current bus, a bidirectional DC-AC converter, a power generation unit group and a main controller. The power generation unit at least comprises two diesel generators connected in parallel and a super capacitor energy storage unit, the diesel generators are connected with the direct current bus through a bidirectional AC-DC converter, and a super capacitor is directly connected to the direct current bus in parallel. The system is coordinated and controlled by the main controller, and the power is instantaneously compensated or absorbed when the load is suddenly changed by utilizing the quick response characteristic of the super capacitor energy storage unit, so that the stability of a direct-current bus is maintained; instantaneous power buffering is provided when a unit is started, stopped, connected to a grid or breaks down, and smooth power transition is achieved. Seamless power switching and parallel operation among a plurality of diesel generating sets are realized, the dynamic stability of the system is effectively improved, the power supply quality is effectively improved, and the service life of equipment is effectively prolonged.

The application discloses an ion source tilting extraction device and relates to the technical field of semiconductor processing equipment; the device comprises a microwave main path, a plasma chamber, a gas supply assembly, an ion beam extraction control assembly and a power supply assembly; the microwave main path comprises a microwave source, a waveguide and a residual power absorption load, the microwave source, the waveguide and the residual power absorption load are sequentially communicated, the waveguide is connected with the plasma chamber, a plurality of slot holes are formed on the waveguide and are spaced apart from each other and face the plasma chamber, and an ion beam extraction outlet is formed on the plasma chamber; the gas supply assembly is connected with the plasma chamber and is used for introducing working gas into the plasma chamber; the ion beam extraction control assembly is arranged at the ion beam extraction outlet of the plasma chamber, and the power supply assembly is electrically connected with the ion beam extraction control assembly. The application can realize uniform tilting extraction of an ion beam and can greatly improve the flexibility of process treatment.

The invention discloses an energy storage photovoltaic consumption control method, device and equipment and a storage medium, and relates to the technical field of power control. Comprising the steps that the current unit power at the current moment, the photovoltaic prediction power at the next moment and the environment temperature of a target heat supply environment of a heat pump host in the thermal control system are obtained, and whether the preset environment thermal comfort condition is met or not based on the environment temperature is judged; if the environment temperature meets the preset environment heat comfort condition, the current heat pump power level of the heat pump host is determined based on the current unit power, and the photovoltaic prediction power is compared with the interval power of the current heat pump power level to determine the frequency adjustment target of the heat pump host; and the operation mode of an energy storage water tank in the thermal control system is obtained, the photovoltaic power consumption state of the energy storage water tank is adjusted according to the operation mode and the frequency adjustment target, and the current unit power of the heat pump host is controlled and adjusted based on the preset storage battery. Therefore, the distributed photovoltaic power can be effectively consumed on the premise of indoor thermal comfort.

The utility model relates to the technical field of power electronics, in particular to a voltage spike absorption circuit and a fire-fighting power supply, which are reasonable in structure, safe and reliable, and capable of improving the quality and operation stability of a power supply product, and is characterized by being provided with a power absorption resistor, a damping resistor, an absorption capacitor and a clamping diode, compared with the prior art, the power supply has the remarkable advantages that the structure is reasonable, the safety and the reliability are realized, the quality and the operation stability of a power supply product can be improved, and the like.

The utility model discloses an energy-absorbing resistor module which comprises two insulating bases arranged in parallel and two groups of resistor strings, and each group of resistor strings is provided with an insulating penetrating rod fixedly arranged between the two insulating bases and a plurality of carbon-based composite resistors sequentially sleeved on the insulating penetrating rod along the length direction of the insulating penetrating rod. Every two adjacent carbon-based composite resistors are bonded and fixedly connected through a heat-conducting and electric-conducting adhesive and are electrically conducted; in addition, a leading-out terminal is connected in parallel between any two carbon-based composite resistors which belong to different resistor strings and are located on the same outermost side. The energy-absorbing resistor module has the advantages of low resistance, very small inductance, high power absorbing capacity, high continuous average power capacity and the like, and well meets the use requirements of various application scenes such as a pulse power supply, power transmission, electric traction, induction heating and the like.

The embodiment of the invention provides a photovoltaic system anti-countercurrent control method, device and equipment based on a single-phase inverter, and the method comprises the steps: obtaining the current-phase load power and inverter output power of each single-phase inverter, and determining the maximum allowable output power and power absorption margin of each single-phase inverter according to the current-phase load power and inverter output power of each single-phase inverter; broadcasting the current-phase load power, the inverter load power, the power absorption margin and the maximum allowable output power of each single-phase inverter to other single-phase inverters through a communication bus; when the current-phase load power of any single-phase inverter is changed, the power adjustment amount is dynamically allocated based on the power absorption margin broadcasted by other single-phase inverters which are not changed, the power adjustment amount is used for independently adjusting the actual inverter output power of each single-phase inverter, split-phase independent control is achieved by arranging the single-phase inverters, and the single-phase inverter can be used for independently adjusting the actual inverter output power of each single-phase inverter. A path of countercurrent caused by excess single-phase power is cut off, the single-phase inverter performs local detection and decision, and the response speed of the system is improved in combination with a communication bus.

Disclosed in the present invention are a regulation and control method and apparatus for a 100% renewable energy power system and considering energy storage control. The method comprises: acquiring basic data of a 100% renewable energy power system; on the basis of the basic data, with the objective of comprehensively minimizing the total operating cost of the power system and the total voltage deviation of nodes in a power grid, constructing an objective function for a regulation and control model of the 100% renewable energy power system, and wind turbine generator set output constraints, photovoltaic generator set output constraints, energy storage operation constraints, direct-current channel operation constraints, power flow constraints and secure operation constraints of the objective function; solving the objective function under the constraints, so as to generate a wind turbine generator set output, a photovoltaic generator set output, the active power absorption of energy storage and a direct-current transmission power of the 100% renewable energy power system when the total operating cost of the power system and the total voltage deviation of the nodes in the power grid are comprehensively minimized; and regulating and controlling the 100% renewable energy power system. By means of implementing the present invention, the voltage stability of a 100% renewable energy power system can be improved.

The invention discloses a hybrid DC transient overvoltage suppression method and system based on MMC and LCC cooperation. The method comprises the following steps: acquiring MMC related data and LCC related data of a hybrid multi-output DC power transmission system in real time; calculating an MMC reactive power absorption upper limit and a sending end AC system reactive power surplus; comparing the size relationship between the reactive surplus of the alternating current system at the sending end and the upper limit of the reactive absorption of the MMC; if the reactive surplus of the sending-end alternating current system is smaller than or equal to the upper limit of MMC reactive absorption, the reactive surplus of the sending-end alternating current system serves as an MMC reactive instruction; otherwise, taking the MMC reactive power absorption upper limit as an MMC reactive power instruction; calculating an LCC current instruction compensation amount according to the MMC reactive instruction; and adding the LCC current instruction compensation amount to the original LCC direct current instruction to form a final current instruction. Based on cooperation of MMC reactive power regulation and LCC current optimization, effective suppression of the transient overvoltage of the hybrid DC system is realized.

The utility model discloses a novel medium wave transmitter benefit coil fixed bolster. Include: coil fixed cylinder, coil fixed cylinder is polytetrafluoroethylene cylinder body, and the outer cylinder wall is evenly provided with a plurality of coil fixed grooves along the extension direction, and the one end to benefit coil board is evenly provided with a plurality of mounting holes, a plurality of mounting holes correspond with the connecting hole of benefit coil board, and the mounting hole is provided with damping connection subassembly, and the connection with connecting hole is realized through damping connection subassembly, damping connection subassembly includes connecting piece and damping washer, and damping washer is located between benefit coil board and coil fixed cylinder, and connecting piece connects benefit coil board, damping washer and coil fixed cylinder in proper order. The utility model is fixed through coil fixed groove, avoids the slip of coil, sets up damping connection subassembly between coil fixed cylinder and benefit coil board, absorbs the mechanical vibration caused by power output fluctuation, avoids the frequent displacement of coil to appear vibration, leads to the problem of signal transmission efficiency decline.

The application discloses a kind of pure new energy power system regulation and control method and device considering energy storage control, method includes: obtaining the basic data of pure new energy power system;According to basic data, with the minimum of power system total operation cost and the total deviation of each node voltage of power grid, construct the objective function of pure new energy power system regulation and control model and the wind turbine generator set output constraint, photovoltaic generator set output constraint, energy storage operation constraint, DC channel operation constraint, power flow constraint and safe operation constraint of objective function;Under the constraint of the above constraint, the objective function is solved, when the total deviation of each node voltage of power grid and the total operation cost of power system are minimum, the wind turbine generator set output of pure new energy power system, photovoltaic generator set output, energy storage active absorption power and DC transmission power are generated, and pure new energy power system is regulated and controlled.Through implementation of the present application, the voltage stability of pure new energy power system can be improved.

The embodiment of the invention provides a new energy base source storage adaptive cooperative control method and related equipment, and belongs to the technical field of power system control. The invention provides a cooperative control mechanism: when a fault occurs, a following network type new energy station adaptively and rapidly reduces active output through a concave function load shedding strategy according to the voltage rise degree of a grid-connected point, and the reactive power absorption capability is enhanced by dynamically supplementing reactive current; meanwhile, according to the frequency change rate and the deviation, the net-forming type energy storage system smoothly and adaptively adjusts the rotational inertia and the damping coefficient of virtual synchronous control of the net-forming type energy storage system through a buffer function, so that the transient supporting performance is improved. Through cooperation and optimization of source and storage side control, on the premise of not depending on an alternating current energy consumption resistor, transient overvoltage is effectively restrained, frequency oscillation is stabilized, the system recovery time is shortened, and an economical and reliable solution is provided for safe and stable operation of a new energy base flexible direct current sending-out system.

This application provides a method, apparatus, and device for anti-reverse current control of a photovoltaic system based on single-phase inverters. The method acquires and determines the maximum allowable output power and power absorption margin of each single-phase inverter based on its local load power and inverter output power. It then broadcasts the local load power, inverter output power, power absorption margin, and maximum allowable output power of each single-phase inverter to other single-phase inverters via a communication bus. When the local load power of any single-phase inverter changes, a power adjustment amount is dynamically allocated based on the power absorption margins broadcast by the other unchanged single-phase inverters. This power adjustment amount is used to independently adjust the actual inverter output power of each single-phase inverter. By setting up independent phase control for each single-phase inverter, the path of reverse current caused by excess single-phase power is cut off. The single-phase inverter performs local detection and decision-making, and combined with the communication bus, the system response speed is improved.

This invention relates to the field of synchronous condenser technology, and more particularly to a synchronous condenser system and its control method. A synchronous condenser system includes a control module, a synchronous condenser, a motor, a shaft, a flywheel, and a brake. A control method for the synchronous condenser system enables the system to start and connect to the external power grid, absorb or output active and reactive power based on external signals, and shut down the system. The synchronous condenser and motor of this invention adopt a coaxial dual-rotor structure, making the overall system structure more compact. The control module controls the synchronous condenser system to absorb or output active and reactive power based on the primary frequency regulation parameters and reactive power demand information of the external power grid, participating in primary frequency regulation and power grid reactive power regulation. The control module also helps to smooth high-frequency power fluctuations in wind or photovoltaic power generation by adjusting the duration and period of active and reactive power absorption or output.

The invention relates to the technical field of diesel generator set control, discloses a diesel generator set parallel operation sudden load unloading cooperative protection method based on energy storage PCS power buffering, and provides a diesel generator set parallel operation sudden load unloading cooperative protection strategy based on energy storage PCS power buffering. The strategy aims at forming a multi-level and active defense system through instantaneous power absorption of an energy storage PCS, cooperative power reduction of a diesel generator speed regulator and shutdown of a part of diesel generators, and therefore zero-interruption power supply of key loads is achieved on the premise that the safety of power generation equipment is guaranteed.