45results about How to "Power balance" patented technology

The invention discloses a power distribution system and method for a modular power supply, and aims to optimize power distribution through an intelligent means, improve the operation efficiency and stability of the system, and control a unit to check the states of all power supply modules, and evaluate the required total power output according to the load demand. Then, based on the capability of each module and a redundancy planning principle, an appropriate module combination is selected to meet the load requirement, and necessary voltage or current adjustment is carried out to ensure stable power supply. In the operation process, the control system continuously monitors the state and the overall performance of each module, and once a fault or an abnormal condition is detected, measures such as automatic switching to a standby module are taken immediately, so that the continuity and the safety of the system are ensured. In addition, through analysis and learning of historical data, the system can continuously optimize a power distribution strategy, and efficiency and reliability are further improved. And the ability of the system to deal with emergency situations is also enhanced.

The invention relates to the technical field of sea surface target multi-mode fusion recognition, in particular to a multi-mode fusion sea surface target recognition method of a high-dynamic unmanned platform. According to the method, a multi-modal fusion recognition framework based on a multi-kernel learning method is provided, and a small-sample multi-modal fusion target recognition algorithm for a sea-surface target is designed on the basis of the multi-modal fusion recognition framework. Target detection and feature extraction are respectively performed according to data characteristics of different sources of visible light images, SAR images and active and passive radar one-dimensional range profile signals, multi-mode heterogeneous features are mapped by using a multi-scale kernel method, weighted fusion of a kernel matrix is performed, global training optimization is performed, and finally a classification result of each sample can be output. The algorithm not only considers the performance of a data-driven target recognition algorithm, but also considers platform hardware computing power limitation and small sample conditions, so that the balance among the performance, computing power and samples can be realized.

The invention discloses a four-wire cascade STATCOM optimized voltage support control method considering active power constraint, which comprises the following steps of: 1, calculating positive and negative zero sequence voltage amplitudes, an initial phase angle and a voltage unbalance degree of a PCC point fault in a three-phase four-wire cascade multi-level energy storage system, carrying out positive and negative zero sequence separation on three-phase current output by the system, and calculating a positive and negative zero sequence voltage amplitude value of the PCC point fault in the three-phase four-wire cascade multi-level energy storage system; obtaining a positive and negative zero sequence voltage amplitude expression; step 2, deriving according to voltage support under active power constraint and current amplitude limiting to obtain the amplitude and phase of the optimal reactive component current injected into the power grid; step 3, obtaining an active component of the reference current needing to be injected through DC capacitor voltage closed-loop control; a switching tube signal of an inverter is generated through a current control loop and a PS-SPWM modulation technology, and the voltage support control method is implemented. After the voltage supporting method provided by the invention is applied, the effect of reducing the degree of unbalance of the PCC point is obvious, and meanwhile, the power balance of the cascaded STATCOM is realized.

The invention relates to the technical field of optical fiber sensing, in particular to an MOMES and FBG fusion sensing system based on a tunable laser array. A multi-wavelength tunable laser array light source is adopted to generate fast broadband frequency sweep laser, the fast broadband frequency sweep laser is split to M paths to be output through a multi-path planar optical waveguide shunt coupler, each path of output end is connected with N FBG sensor arrays and one MOMES sensor, and sensing signal reflected light is received by a corresponding photoelectric detector. After data processing is carried out through a photoelectric converter, a logarithmic amplifier, an analog-to-digital converter and an FPGA compatible algorithm platform, wave crests and wave troughs of reflection spectrum data of each wavelength point are searched at the same time; the wave crest data is used for demodulating the FBG sensor array, and the wave trough data is used for demodulating the MOMES sensor. According to the optical path structure and algorithm design of the system, synchronous demodulation of the FBG and the MOMES sensor is realized, and the compatibility and operation efficiency of the system are remarkably improved.

The invention provides a secondary battery and electric equipment, and belongs to the technical field of new energy. According to the invention, the first positive electrode active material layer and the second positive electrode active material layer with specific position sequence and specific lithium iron phosphate particle size distribution are arranged on the positive electrode current collector, so that the bottlenecks of quick charge performance and power performance of the secondary battery are broken, and the quick charge performance, the power performance, the cycle performance and the energy density are better balanced.

The invention provides a nine-level inverter topological structure and a modulation method thereof, the topological structure comprises a load end, and a first direct-current voltage source, a second direct-current voltage source and a third direct-current voltage source which are respectively connected with the load end, and the output voltage ratio among the first direct-current voltage source, the second direct-current voltage source and the third direct-current voltage source is 2: 1: 1. By configuring an insulated gate bipolar transistor and a power diode, the number of switching tubes is reduced, and the inverter is ensured not to have the problems of power backward flowing and instantaneous peak voltage, so that the power backward flowing phenomenon caused by the fact that the current of a high-voltage power unit reversely flows into a low-voltage power unit and the instantaneous peak voltage during inductive loading are avoided; the stability of circuit output power is ensured, the design is simplified, and a step wave and carrier wave laminated hybrid modulation method is used, so that the low switching loss of a high-voltage power unit and the excellent harmonic characteristic of the output voltage of the inverter are ensured.

The invention discloses a vehicle and a control method and a control device thereof. The method comprises the following steps: acquiring the required power of a whole vehicle, the heat production capacity and the heat dissipation capacity of the whole vehicle within a preset time, and the residual charge capacity and the temperature of a power battery; determining basic distribution power of the engine based on the residual charge quantity and the required power of the whole vehicle; under the condition that the whole vehicle heat production amount is larger than the whole vehicle heat dissipation amount or the temperature of the power battery is larger than a first preset temperature threshold value, the power of the power battery is limited to be a first preset power threshold value, the basic distribution power of the engine is adjusted based on the whole vehicle demand power and the first preset power threshold value, and the target power of the engine is obtained; and controlling the engine based on the engine target power. According to the control method, the power of the engine and the power of the power battery can be relatively balanced, uncontrollable temperature rise of a single assembly cannot be caused even if the load is continuously high, the good performance of the vehicle can be maintained for a long time, the cost is reduced, and the hardware heat dissipation capacity does not need to be upgraded by spending extra cost.

The invention relates to the technical field of power grid power supply and distribution control, in particular to a micro-grid intelligent power balance control method, device and system, and the method comprises the steps: obtaining the output voltage of a micro-grid photovoltaic panel line at each collection moment, and obtaining the local voltage distribution fluctuation degree of each output voltage in an output voltage sequence; obtaining an illumination floating influence degree; the method comprises the following steps: acquiring an operation steady-state reference voltage by combining different voltage values in all output voltages and the occurrence times of the different voltage values in an output voltage sequence, further acquiring the voltage change intensity in a line, calculating a boost regulation and control coefficient based on the voltage change intensity, and calculating the boost regulation and control coefficient by combining the difference between a preset maximum boost value and the operation steady-state reference voltage. And acquiring a boost regulation and control value of the line to calculate a target voltage regulation value of the buck-boost converter, and regulating the output voltage of the photovoltaic panel through the buck-boost converter. According to the invention, the balance of micro-grid power can be maintained.

The invention discloses a dual-active-bridge converter device with even modules and a zero common-mode modulation method, device and system, and belongs to the technical field of common-mode interference rejection, the device comprises 2N dual-active-bridge converters, and a primary side dual-active bridge in each dual-active-bridge converter is connected with an isolation transformer through a symmetrical coupling phase-shifting inductor; the zero common mode modulation method comprises the following steps: equally dividing the dual-active converter into N groups, for each group, under the condition that the output power requirement is met, controlling switch driving signals of bridge arms A1 and A2 to be complementary, and controlling the internal shift ratio between A1 and B1 to be equal to the internal shift ratio between A2 and B2; and under the condition that the switch driving signals of the C1 and the D1 are complementary and the switch driving signals of the C2 and the D2 are complementary, the external shift ratio between the A1 and the C1 and the external shift ratio between the A2 and the C2 are adjusted, so that the power of the two converters is equal. According to the invention, the problem of common-mode interference suppression of a multi-module dual-active bridge converter device can be effectively solved.

The invention discloses a broadband random noise source with a high excess noise ratio, and belongs to the technical field of microwave and millimeter wave vacuum devices. The broadband random noise source comprises a medium-loaded gyrotron traveling wave tube and a Bragg filter, a wide-spectrum noise floor signal is generated by increasing the axial length of a medium loading circuit in the medium loading gyrotron traveling wave tube, and reflection filtering is performed on the wide-spectrum noise floor signal by arranging a Bragg filter between a collecting stage and an output window, so that a high-flatness wide-spectrum random noise signal is obtained. The characteristics of high power, high frequency and wide bandwidth of the gyrotron traveling wave tube for amplifying microwaves are utilized, noise floor signals can be amplified to generate high-power noise signals, meanwhile, the Bragg filter is loaded to carry out filtering and power balancing on the noise floor signals, and therefore high-power, wide-frequency-spectrum and high-flatness random noise signal output is achieved. And the output power of the generated noise signal is effectively improved.

The invention discloses a power transmission network extension planning method and device considering optimal consumption of new energy, and the method comprises the following steps: determining a net load disturbance acceptable domain, and calculating the reliability cost; establishing a power transmission network expansion planning model, and determining an objective function and constraint conditions of the model; processing the power transmission network expansion planning model, and solving the model; wherein the objective function of the model is line investment cost, standby cost, reliability cost and unit operation cost minimization, the quadratic term of the line cost part can be piecewise linearized, and a dual method is adopted to convert a constraint condition uncertainty model into a deterministic model for solving; according to the method, the whole model is converted into a deterministic model, so that the calculation efficiency of the model and the robustness of a planning result are greatly improved.

The invention relates to a multi-source self-adaptive power generation coordination control method. The method comprises the following steps: acquiring state data of each power generation device in a power grid; performing centralized training on the state data of each power generation device by adopting a federated learning mode to obtain a global power generation power prediction model; combining the obtained global power generation power prediction model with a corresponding power generation equipment physical model to obtain an overall prediction model; and dynamically adjusting a power generation control strategy and parameters of the overall prediction model according to the real-time state data and the optimization target of each power generation device, and obtaining a control strategy of each power generation device by adopting the adjusted overall prediction model. Compared with the prior art, the method has the advantages that the power generation power is accurately predicted and optimized, the optimal selection and dynamic adjustment of the power generation strategy are further realized, and the improvement of the system performance and efficiency is facilitated.

The invention relates to the technical field of power systems, and discloses a transformer area interconnection system based on direct current coupling and a control method thereof. The system is connected with two transformer areas through a direct-current coupling module, at least one transformer area comprises photovoltaic power generation equipment and / or an energy storage battery, and the photovoltaic power generation equipment and / or the energy storage battery are connected to a direct-current bus through a DC / DC converter and then connected to the low-voltage side of a power distribution network through an AC / DC converter. Each transformer area is provided with a fast-charging direct-current charging station which can be connected to the low-voltage side of the power distribution network or a direct-current bus. The control method comprises the steps of collecting the power and the voltage of the transformer, calculating the average power and the maximum power demand of the transformer area in continuous preset time, controlling the charging and discharging power of the energy storage battery according to the change of the average power, and implementing the power balance control of the transformer area according to the maximum energy storage capacity of the energy storage battery. The energy utilization efficiency and the power supply reliability are improved, the operation cost is reduced, the intelligent level of energy management is improved, and remarkable economic and social benefits are achieved.

The invention relates to the technical field of power grid dispatching, in particular to an active-reactive collaborative optimization dispatching method for a power distribution network. Acquiring voltage, active power and power grid line data at the uploading moment of the user side and various monitoring data of the transformer substation in a preset time period; because the user side data and the transformer substation side data are in space-time asymmetry and have measurement blind areas, various data numerical value characteristics are fused and analyzed and compared with the user side voltage, a voltage-power transmission coefficient is determined, an accurate voltage prediction model is constructed, and the voltage prediction value of the user side at each preset moment is obtained; as the time goes on or the photovoltaic fluctuates greatly, the error increases, so that the active power change in the preset time period and the active power difference of the user side at the to-be-measured moment are corrected based on the difference characteristics of the transformer station monitoring data, and the corrected available capacity of the inverter is obtained; and determining an adjustment burden index by combining the voltage predicted value, and finally adjusting the transformer according to an index accumulation condition and the voltage predicted value.

The invention provides an equipment control method, energy storage equipment and a storage medium, and the method comprises the steps: determining a first active droop coefficient and a first reactive droop coefficient according to the rated power of a power converter; determining a direct current bus voltage and a preset voltage value of the direct current bus corresponding to the power converter, and determining a second active droop coefficient according to the direct current bus voltage and the preset voltage value; determining a third active droop coefficient according to the first active droop coefficient and the second active droop coefficient; and controlling the power converter according to the third active droop coefficient and the first reactive droop coefficient. According to the invention, the output power can be balanced, and the ring current suppression effect can be improved.

The utility model belongs to the technical field of precision machining, and particularly relates to a gear type PCD trimmer. The gear type PCD trimmer comprises a supporting base body, a gear-shaped PCD piece and a reinforcing ring which are arranged in a split mode, gear teeth matched with the gear honed by the honing wheel are arranged on the supporting base body in the circumferential direction, and a gear shaft is integrally formed on the supporting base body. A central hole coaxially matched with a gear shaft is formed in the gear-shaped PCD piece, the gear-shaped PCD piece is tightly attached and fixed to the end face of the supporting base body and provided with dressing teeth which correspond to gear teeth one to one and are matched with the gear teeth in shape, and the dressing teeth are used for being meshed with the honing wheel to grind and dressed the honing wheel; the reinforcing ring is fixedly arranged on the gear shaft in a sleeving mode and fixedly attached to the gear-shaped PCD piece. The aluminum profile is low in manufacturing difficulty, high in strength and long in service life.

The invention relates to a method for improving transient stability of a network-building type converter based on voltage amplitude regulation, which comprises the following steps of: simplifying a network-building type converter system model; obtaining three-phase active power from the voltage of the network-constructing converter to the voltage of the power grid and a droop relation between the active power and the frequency; based on the three-phase active power, drawing a relation curve between the active power and the phase angle difference between the grid-forming converter and the power grid, obtaining the active power conversion condition of the grid-forming converter, and determining the condition and balance point of the grid-forming converter for maintaining the transient stability according to the active power conversion condition; and when transient instability of the network-forming converter occurs, according to the conditions, adjusting the voltage and the line resistance of the network-forming converter to reach a new balance point, improving the transient stability of the network-forming converter, and keeping the voltage of the network-forming converter to be greater than the voltage amplitude of the network-forming converter.

This invention relates to the field of coal-to-methanol production equipment technology, and more particularly to a distillation column for separating crude methanol by-products from coal-to-methanol production. The column includes a pre-distillation column, a pressurized distillation column, and an atmospheric distillation column. An energy-saving control device is installed between the pressurized and atmospheric distillation columns. The power control device controls the steam output of the pressurized distillation column, and then valve two controls the liquid phase distribution to the atmospheric distillation column, thereby achieving equilibrium and effectively saving energy. A temperature compensation device is installed between the pressurized distillation column and the reboiler. This device includes a heat storage body installed on pipeline two, with an insulation layer outside the heat storage body. A temperature sensor is installed near the end of the heat storage body. The heat storage body can store heat when the steam flow is high, thus stabilizing the power of the reboiler and providing a buffer time for delayed feedback control, ensuring stable operation of the three columns.

The present invention discloses a long-period modular high-heat-density solid thermal storage battery and its energy conversion model, which belong to the field of power systems. The electric heat exchange device provides thermal power for the high-heat-density medium to store heat, and the high-heat-density medium is used to store the thermal energy generated by the electric heat exchange device; the thermoelectric conversion device converts the thermal energy stored in the high-heat-density medium into electrical energy, and the thermal insulation layer is used to isolate the heat transfer between the high-heat-density medium and the outside air. Based on the LSTM algorithm, the present invention proposes an LSTM-based electric-thermal conversion efficiency model and an electric-thermal conversion efficiency model, which are respectively used to improve the accuracy of the calculation of electric-thermal conversion efficiency and thermal-electric conversion efficiency. The present invention has the advantages of low manufacturing difficulty and low cost, and can be modularly assembled according to the needs of different scenarios (new energy capacity differences, regional load differences, heating demand differences, etc.), and has broad application prospects.

The present invention discloses a voltage support method for a three-phase four-wire cascade multi-level system considering power balance, step one, calculating the following parameters in the three-phase four-wire cascade multi-level energy storage system: the positive-sequence, negative-sequence, and zero-sequence voltage amplitude, initial phase angle, and voltage imbalance of the PCC point fault, separating the three-phase current output by the system into positive, negative, and zero sequences, and obtaining the voltage amplitude expression of the positive, negative, and zero sequences; step two, achieving power balance in the three-phase four-wire cascade multi-level energy storage system by adjusting the ratio of the injected negative-sequence current and zero-sequence current to the positive-sequence current, and obtaining the conditions for the system to meet power balance; step three, calculating the optimal voltage support point under the condition that the grid imbalance is minimal and the grid currents of each phase and the neutral current meet the current limit. After applying the voltage support method proposed by the present invention, the PCC point imbalance is significantly reduced, and the power balance of the cascade multi-level energy storage system is achieved at the same time.

The present invention relates to a hydraulic full-period frequency regulation new energy generator set and a primary frequency regulation method thereof. The generator set includes blades, a one-way quantitative hydraulic pump, a coupling, a proportional throttle valve, a two-way variable hydraulic motor, an excitation synchronous generator, a grid-connected cabinet, a turbine, a water valve, a water storage tank, a water pump, a bladder accumulator, an energy conversion element, a hydraulic oil tank, an overflow valve, a generator, an oil replenishment pump and a one-way valve. According to different wind conditions, it is divided into three areas, namely, a maximum power tracking area, a constant speed area and a constant power area, and when the grid frequency deviates from 50Hz, the stability of the grid frequency is controlled by changing the rotor kinetic energy of the blades and the opening of the proportional throttle valve, the bladder accumulator storage and supply, and the hydraulic storage and supply. The hydraulic storage and supply of the present invention stores more energy and has a longer frequency regulation period. It uses a wind-storage combination method to perform comprehensive frequency regulation control, so that the frequency anti-interference ability of the entire system is enhanced.

This invention discloses a microwave photonic power equalizer and a microwave photonic power equalization method based on power monitoring and compensation. The equalizer includes a light source, a carrier-suppressed double-sideband modulation module, an optical power control module, a data processing and driving module, an optical power detection module, and a photodetector. The light source is split into two paths via an optical coupler: one path inputs to the carrier-suppressed double-sideband modulation module, and the other path inputs to the optical power control module. The carrier-suppressed double-sideband modulation module also outputs a channel to the optical power detection module. This invention provides a microwave photonic power equalizer and a microwave photonic power equalization method based on power monitoring and compensation. It enables power equalization of broadband microwave signals in the optical domain, without being limited by the frequency and bandwidth of electronic devices. Power equalization can be performed in real time based on changes in the power of the input signal simply by changing the power of the optical carrier through the optical power control module. Furthermore, all components used can be integrated, achieving miniaturization.

The invention provides a ridge-shaped mixed-polarity direct-current power distribution system. The ridge-shaped mixed-polarity direct-current power distribution system comprises a high-voltage side bipolar bus, a low-voltage side bipolar bus, a current converter part for connecting a high-voltage power distribution network with a low-voltage power distribution network, and a high-voltage and low-voltage bipolar direct-current common neutral line, the converter part is composed of a four-port active bridge QAB converter and a power direct transmission line. A positive electrode high-voltage side active bridge of the converter part is composed of four MOSFET switch tubes S11, S12, S13 and S14 and four anti-parallel diodes D11, D12, D13 and D14, a low-voltage side is composed of switch tubes S21, S22, S23 and S24 and diodes D21, D22, D23 and D24, the high-voltage side active bridge and the low-voltage side active bridge are connected through a high-frequency transformer with the turn ratio n being 1: 1, the equivalent leakage inductance of the transformer is Lr1, and the negative electrode and the positive electrode have the same structure. According to the invention, the direct current systems with different voltage levels are interconnected, the partial power transmission capability of the high-voltage and low-voltage direct current systems is realized, the load access selection of the five voltage levels of + / -2VDC, 4VDC and + / -VDC is realized, and the operation mode is flexible.

The present invention belongs to the field of advanced control technology for high-performance power conversion systems, and specifically relates to a reliable parallel control system and method for efficient bidirectional power conversion modules, including a bipolar current space vector modulation module, an input current sharing backstepping control module and an output voltage sharing backstepping control module; wherein the input current sharing backstepping control module includes an output current outer loop backstepping controller, an output voltage middle loop backstepping control unit, and an input current inner loop backstepping control unit; the output voltage sharing backstepping control module includes an output voltage outer loop backstepping control unit and an input current inner loop backstepping control unit; the current stress and voltage stress of the switch tube are greatly reduced, and a modular design is adopted, which is easy to expand; from the perspective of energy conservation, the output voltage sharing and input current sharing of each module are used as the entry point, and the power balance between modules is achieved through the power balance backstepping control method, which effectively improves the safety and reliability of the parallel system.

The invention belongs to the technical field of power system regulation and control, and particularly relates to a regulation and control method and system for power balance of a distribution network system. The method comprises the steps that grid division is carried out on a distribution network system, each grid comprises a power supply and a load, the power supply comprises a new energy power supply and a traditional power supply, and the load comprises a flexible load; when the total power of the power supply and the total power of the load in the grid are unbalanced, regulating and controlling the power of the flexible load or the power of the new energy power supply in the grid in situ according to the total power of the power supply and the total power of the load in the grid; if the grid is still unbalanced after regulation and control, the distribution network monitoring system is used for regulating and controlling the traditional power supply power in the grid, so that the total power supply power and the total load power in each grid are balanced, the regulation and control time is shortened, the communication and operation pressure of the distribution monitoring system is reduced, the source load power in the grid can be quickly balanced, and the power of the whole distribution system is further quickly balanced; electricity utilization requirements of different types of loads are met, and overall reliable operation of a distribution network system is guaranteed.

The invention discloses an alternating-current micro-grid frequency adjusting device adopting fuzzy logic, and relates to the technical field of micro-grid control, comprising an initialization module for initializing parameters; the data acquisition module acquires operation parameters in real time; the hierarchical control module comprises a primary control unit and a secondary control unit, the primary control unit outputs frequency and output voltage based on a droop control strategy, and the secondary control unit performs fine adjustment on frequency deviation and voltage deviation of adjustment of the primary control unit according to fuzzy logic; and the simulation optimization module constructs a micro-grid simulation model, performs simulation verification, and obtains optimal PI controller parameters by optimizing an objective function. By adopting fuzzy logic control and an objective function optimization algorithm, PI controller parameters are dynamically optimized, the stability of the micro-grid is effectively improved, the electric energy quality is optimized, frequency fluctuation and harmonic distortion are reduced, meanwhile, multi-objective optimization is achieved, and efficient and stable operation of the micro-grid under complex working conditions is ensured.

The application relates to a vanadium flow battery energy storage power distribution method, device and system, and relates to the technical field of energy storage energy management. The method comprises the following steps: performing online parameter identification processing on an acquired equivalent loss model to determine battery identification parameters of a plurality of battery groups; determining the health states of the plurality of battery groups according to the battery identification parameters, original battery resistances and resistance values at a time of scrapping; determining the charging and discharging priorities of the plurality of battery groups according to the battery states of charge and the health states; selecting a plurality of target battery groups participating in power distribution from the plurality of battery groups according to total scheduling demand power and the charging and discharging priorities; determining a multi-objective function with the minimum battery working loss, the minimum state of charge uniformity and the minimum total life loss as targets according to the battery identification parameters and the battery states of charge, and constructing a multi-objective optimization model; and solving the multi-objective optimization model based on constraint conditions to obtain target power distribution results of the plurality of target battery groups.

The application relates to the field of silicon-based optoelectronic integration, and particularly discloses an on-chip adaptive combining method and a feedback system for polarization diversity MZM, which comprises the following steps: optical coupling and mode conversion, polarization diversity electro-optical modulation, optical power collection and photoelectric conversion, signal processing and feedback control, and a tunable combining module; after the coupling conversion and modulation, two-way optical power is collected and photoelectrically converted, a power difference voltage is obtained through an analog circuit, a control voltage is generated by superimposing a bias voltage, and a tunable combiner is driven to dynamically adjust a beam splitting ratio to complete combining. The application solves the problems that the output power of the polarization diversity MZM randomly fluctuates with the polarization state, the existing polarization control scheme has slow response, a complex structure and is difficult to integrate with a silicon-based process, realizes real-time and accurate compensation of power fluctuation, guarantees stable combining output power, and has a simple system structure, low power consumption, is easy to monolithically integrate with a silicon-based chip, and improves the performance and compatibility of an integrated photonic link.

The invention belongs to the field of fluid machinery, and discloses a separation and purification fan system, a purification device capable of being applied to a centrifugal fan comprises a separation and purification assembly and a surfactant water flow assembly, and the separation and purification assembly comprises a rotatable filler supporting frame and a porous filler; the surface active agent water flow assembly comprises a surface active agent box body and a water inlet pipeline; the water inlet pipeline is used for conveying liquid containing a surface active agent into the porous filler of the separation and purification assembly; a grease separation assembly capable of synchronously rotating is further arranged at the front end of the filler supporting frame; in addition, a fixed multi-layer arc-shaped flow guide structure is arranged on the front side of the grease separation assembly. The separation and purification assembly capable of coaxially rotating with the impeller of the centrifugal fan is utilized, and under cooperation of the surfactant water flow assembly, purification of pollutants in air flow conveyed to the centrifugal fan can be achieved. The correspondingly obtained centrifugal fan with the purification function has the characteristic of integration, and is small in size and high in purification and separation efficiency.

The present application provides a method, device, medium and equipment for monitoring power balance based on an electric power system, including: obtaining the power load forecast result after the influence of new energy, obtaining the power load value affected by the demand side response; obtaining the power of the energy storage device on the user side on the power grid load, the power value of the energy storage device on the power grid side and the power value of the distributed new energy energy storage device, and calculating the power load forecast value according to the power load forecast result after the influence of new energy, the power load value affected by the demand side response, the power of the energy storage device on the user side on the power grid load, the power value of the energy storage device on the power grid side and the power value of the distributed new energy energy storage device, and determining the adjustment strategy according to the power load forecast value and preset conditions. The adjustment strategy is obtained by obtaining the power load value affected by the demand side response and the power of the energy storage device on the power grid load to balance the power.