233 results about "Distributed power generation" patented technology

The invention relates to the technical field of scheduling management, in particular to a source network load optimization scheduling analysis method and system for an active power distribution network of an electric vehicle. The method comprises the following steps: acquiring power supply side data, power grid side data and load side data in real time, and performing sliding filtering and standardization processing to obtain source network load standard data of the electric vehicle; historical charging data, traffic flow data, weather data and user appearing habit data are obtained, and load and power output prediction calculation is carried out to predict and output electric vehicle charging power distribution and distributed power generation power distribution; a corresponding multi-objective optimization function and a power distribution network operation constraint condition are constructed through an electric vehicle active power distribution network, a source network load optimization scheduling model is constructed, and a source network load optimization scheduling scheme is solved to adjust corresponding electric vehicle charging power and distributed power generation power in real time. The energy utilization efficiency and the power grid operation stability can be improved.

The invention provides a meteorological-distributed power supply-load long-term joint prediction method, and relates to the technical field of power system load prediction, and the method comprises the steps: introducing a multi-channel attention fusion mechanism, and constructing a feature fusion layer; performing multi-source feature coding and feature weighted fusion by using a meteorological encoder, a power encoder, a load encoder and a feature fusion layer to obtain a sample training data set; based on the time weighted loss function, adopting the sample training data set to supervise and train the long-short term memory network until convergence; and executing generation power prediction and power load prediction by using the long-term trend prediction plug-in. According to the method and the device, the technical problem of insufficient coupling modeling between prediction objects in the prior art can be solved, the technical target of collaborative modeling between the weather, the distributed power supply and the load is realized, and the technical effect of improving the power prediction precision is achieved.

The invention provides a power distribution network load flow calculation and optimal scheduling method and device based on a graph convolutional network, and the method comprises the steps: obtaining node power balance, distributed power supply output limitation and voltage constraint conditions from a network correlation matrix and original parameters of a power distribution network, adjusting the weight of the constraint conditions through the correlation matrix, and obtaining a load flow calculation result; generating a power distribution network load flow calculation nonlinear equation set; identifying an overload line and a low-voltage node from node voltage amplitude, phase angle and branch power data, generating an optimized operation scheme meeting N-1 security constraints by using a load clustering prediction and distributed power supply output probability model, and generating a power distribution network scheduling strategy; weak links are identified from a power distribution network scheduling strategy, the influence of future load increase on voltage and power is predicted by using global feature vectors, and a grid structure optimization suggestion and an equipment upgrading scheme are generated according to a power distribution network planning standard.

The invention discloses a high-water-resistance photovoltaic module non-glass front plate and a preparation method thereof. The non-glass front plate comprises a transparent fluorine film, a cut-off type transparent flame-retardant adhesive film and a transparent water-blocking composite plate; the transparent water-blocking composite board comprises a transparent transition layer, a transparent PET film, a water-blocking film and a transparent priming coat which are compounded in sequence; the cut-off type transparent flame-retardant adhesive film contains an ultraviolet light absorber; a transparent transition layer in the transparent water-blocking composite board is compounded with the cut-off type transparent flame-retardant adhesive film; the transparent bottom coating is provided with protruding points protruding out of the surface of the coating. The high-water-resistance photovoltaic module non-glass front plate has the advantages of high weather resistance, high light transmittance, light weight, water resistance and flame retardance, is suitable for distributed power generation scenes, and can effectively overcome the defects that a glass back plate is heavy in weight, not easy to install and high in infrastructure requirement.

The invention provides a large-scale distributed power supply access rural power distribution network fault feature analysis method, which comprises the following steps of 1, analyzing rural power distribution network fault feature types, including short-circuit fault features, small-current grounding fault features and arc light high-resistance fault features; 2, establishing a fault equivalent model of the distributed power supply; and step 3, analyzing the fault characteristics of the rural power distribution network containing distributed power supply access. According to the scheme, the influence of large-scale distributed power supply access on the short-circuit fault characteristics of the power distribution network is analyzed, and the influence of various influence factors such as the type, the position and the fault impedance of the distributed power supply on the amplitude, the phase and the like of fault current is systematically analyzed and summarized; the limitation of a traditional short-circuit fault differential protection algorithm applied to a distributed power supply access scene is discussed, and a foundation is laid for follow-up related research of a rural power distribution network.

The invention relates to the technical field of micro-grid control, and provides an island micro-grid distributed control method, system and device and a storage medium. Comprising the following steps: performing voltage compensation gain and frequency compensation gain calculation based on droop control output of each distributed power generation unit, droop control output of all neighbor distributed power generation units, and a voltage dynamic tracking error and a frequency dynamic tracking error which are obtained by calculating a microgrid global recovery target to obtain secondary adjustment output; and after corresponding items in the droop control output and the secondary regulation output are summed to generate comprehensive reference output, voltage synthesis is carried out according to the comprehensive reference output to obtain voltage regulation output for output control of a corresponding inverter. Based on a distributed regulation and control mechanism for cooperatively calculating the compensation amount of each power generation unit by using neighbor information and a global recovery target, the dynamic response speed and the power distribution precision can be improved, voltage drop and frequency deviation caused by load disturbance are effectively eliminated, and rapid recovery is realized.

The invention provides a district-based distributed power consumption capability assessment method and system and a medium, and belongs to the technical field of power system capability assessment. The method comprises the steps that pre-processed associated data parameters are classified and stored, and a structured feature database is generated; constructing a transformer area load vector model according to the load power flow direction of the power distribution transformer areas of the power grid line, screening and classifying a plurality of power distribution transformer areas with similar characteristics of the line, and constructing a line load quantification model based on the structured characteristic database and the transformer area load vector model; obtaining a power distribution area consumption capability range according to the structured feature database and the area load vector model, and obtaining a line consumption capability range according to the structured feature database and the line load quantification model; and on the basis of the principle of minimizing the two, combining the power distribution area consumption capability range and the line consumption capability range to generate an actual evaluation result of the power grid consumption capability. According to the method, the district-based distributed power consumption capability evaluation precision can be effectively improved.

The invention discloses a high-voltage distribution network reactive voltage optimization method, device, equipment and medium based on a time scale, and relates to the technical field of distribution network optimization, and the method comprises the following steps: obtaining the real-time operation state data and prediction information of a high-voltage distribution network, dividing the operation time of the high-voltage distribution network, obtaining the divided data, and calculating the real-time operation state data of the high-voltage distribution network; the division data comprises a long time scale and a short time scale; under a long time scale, based on load prediction and distributed power supply output prediction, a mixed integer programming model is established, and a capacitor bank switching scheme and a transformer tap reference position are obtained; under a short time scale, constructing an optimal power flow model with minimum voltage deviation as a target, and dynamically calling the reactive capacity of the distributed energy converter for real-time correction; and establishing a cross-time-scale coordination control mechanism, triggering advanced re-optimization of a long time scale when the accumulated reactive power regulation quantity under a short time scale reaches a preset reactive power capacity threshold value, and updating an equipment action constraint condition.

The invention discloses a distributed electricity-hydrogen coupling system coordination control method and device based on edge calculation and an upper computer. The method comprises the following steps: firstly, acquiring electric quantity information and hydrogen energy data of each energy device in the distributed electricity-hydrogen coupling system; predicting the generating capacity of various distributed power generation devices and the power consumption of various loads; then selecting a target operation mode of the distributed electricity-hydrogen coupling system; and according to the optimization objective function and the constraint condition of the target operation mode, obtaining an optimal operation strategy of the target operation mode, and finally, the optimal operation strategy is sent to each energy device in the distributed electricity-hydrogen coupling system, so that the energy devices operate according to the optimal operation strategy, and distributed electricity-hydrogen coupling system coordination control based on edge calculation is completed. According to the method, the control speed of the distributed electricity-hydrogen coupling system can be remarkably improved, so that the overall operation efficiency is improved, and meanwhile, the reliability and the expandability of the system are enhanced.

The invention discloses a method for evaluating the carrying capacity of a distributed power supply of a power grid, and aims to solve the defects of a traditional method in the aspects of dynamic modeling, complex topology adaptability, real-time performance and robustness. According to the method, multi-scale time features and spatial dependence features are extracted through wavelet transform and a graph neural network, and comprehensive feature vectors are generated through multi-head attention mechanism fusion; constructing a Transform and gating cycle unit hybrid model, embedding power balance and voltage stability constraints, and predicting the bearing capacity; optimizing the access capacity and position by using a depth deterministic strategy gradient algorithm; parallel processing and result verification are realized through distributed calculation and a digital twinborn model; and evaluating the extreme scene risk by adopting a generative adversarial network and a conditional value-at-risk method. According to the method, the evaluation precision, the real-time performance and the robustness are remarkably improved, the access capacity is improved, and the method is suitable for an intelligent power grid scene with high-proportion distributed power supply access and has good economic and social benefits.

The invention discloses a preparation method of a distributed power generation variable frequency driving cable, and belongs to the technical field of power cables. The prepared cable is composed of a cable core, a filling material, a metal shielding layer, an aluminum-plastic composite layer and an outer sheath layer. Wherein the outer sheath layer is prepared from the following raw materials in parts by weight: 70-90 parts of polypropylene resin, 22-30 parts of ethylene-vinyl acetate copolymer, 15-25 parts of modified magnesium hydroxide and 4-6 parts of lubricant. Polypropylene is used as a matrix, so that the cable is endowed with excellent mechanical property and electrical insulation property; wherein the ethylene-vinyl acetate copolymer can enhance the anti-aging performance of the cable; wherein the modified magnesium hydroxide has good compatibility with a polypropylene matrix, can greatly enhance the flame retardance, smoke suppression, aging resistance and rat-proof performance of the cable, and is stable in performance; therefore, the prepared cable is good in mechanical property, has stable and efficient flame retardance, smoke suppression, aging resistance and rat-proof performance, and has important application value in the technical field of power cables.

According to the distributed energy management system for the smart power grid and the optimal scheduling method thereof, efficient, intelligent and sustainable management of power resources is realized by integrating advanced data acquisition, processing, optimal scheduling, control execution and user interaction modules. The system adopts a multi-dimensional optimization scheduling strategy and a self-adaptive control strategy, and is combined with a digital twinning technology, so that the accuracy of real-time monitoring and prediction of the running state of the power grid is improved, and the response speed and the decision-making capability of the system are enhanced. The system can automatically adjust the operation parameters of the distributed power generation resources and the energy storage system, realizes accurate load control, improves the energy utilization efficiency, reduces the operation cost, and promotes the sustainable development of a power grid. Meanwhile, the transparency of the system and the participation degree of users are improved through the use of the user interaction module, and powerful technical support is provided for construction and operation of an intelligent power grid.

The invention discloses a furnace flue gas waste heat graded cycle power generation method and system, which combines multi-stage purification and temperature division utilization, and comprises the following steps: firstly, carrying out component analysis and desulfurization purification treatment on furnace flue gas, establishing a layered purification chain, and identifying an acid dew point area; a safe flue gas purification area is formed through material adaptability evaluation and corrosion control measures; then carrying out temperature gradient analysis and temperature field reconstruction on the purified flue gas, establishing a heat grade distribution mechanism and forming a gradient heat energy flow to realize complementary utilization of heat sources at different temperature sections; a water vapor main cycle and organic working medium auxiliary cycle cascade power generation system is constructed, and the magnetic suspension bearing technology is integrated to improve the auxiliary cycle power generation efficiency; establishing a heat balance parameter and optimizing a circulation network through heat matching degree monitoring and mismatch detection; and finally, an energy transfer matrix is constructed, distributed power generation configuration is formed through generator coupling analysis and rotating speed coordination control, stable electric energy output is completed, and efficient utilization of waste heat is achieved.

The invention provides a micro-grid optimization scheduling method, system and device and a readable storage medium, and the method comprises the steps: constructing a micro-grid system which is used for collecting the operation data of a distributed power generation device and energy storage equipment in real time, and adjusting the load of a user side through executing a scheduling strategy; constructing a micro-grid optimization scheduling model, setting an objective function of the model, setting constraint conditions of the model, and calculating an optimal operation strategy of the micro-grid system by solving the micro-grid optimization scheduling model; constructing a QUBO model, and associating the QUBO model with the micro-grid optimization scheduling model to determine an optimal operation strategy of the micro-grid system by calculating an optimal solution of the QUBO model; based on the QUBO model, performing conversion processing on the objective function and the constraint condition of the micro-grid optimization scheduling model to determine the objective function of the QUBO model; and obtaining operation data of the micro-grid system in real time, and generating an optimal operation strategy through the micro-grid optimization scheduling model.

The invention relates to a park micro-grid distributed power supply and energy storage coordinated optimization configuration method, and belongs to the field of power system computer software application. The method comprises the steps that original data collection and import design is carried out, and a user interaction visual interface is created and used for importing and visualizing original data needed by micro-grid planning; establishing and designing a distributed power generation model, namely establishing a wind power generation model and a photovoltaic power generation model; establishing and designing an energy storage model, and adopting a KiBaM quasi-steady-state battery simulation model; time-of-use electricity price setting design: designing a time-of-use electricity price setting interface; model control and target optimization design, including micro-grid power balance and storage battery charging and discharging power control design; designing a micro-grid operation program, and optimizing system configuration and a scheduling strategy; and carrying out simulation calculation and result data analysis, verifying the effectiveness of a system optimization configuration scheme, and realizing park micro-grid distributed power supply and energy storage coordinated optimal configuration.

The invention discloses a flexible interconnection and mode smooth switching method for a distributed power generation system, and relates to the technical field of distributed power generation, and the method comprises the steps: building a droop control relation through continuously collecting DC voltage and current for a source side rectifier of each power generation unit; in a normal mode, the output current of the back-to-back rectifier and the voltage of an intermediate capacitor are collected, the same phase of the current and the load current is kept by using phase locking control, and voltage regulation is realized by combining a dq coordinate model; when a fault of a source side rectifier is detected, an alternating current reference value is generated based on intermediate capacitor voltage deviation and is input into a single current loop controller for voltage stabilization, and meanwhile, a phase advance, adaptive gain and integral saturation resistance mechanism is introduced, so that quick response and stable operation are ensured; in the mode switching process, normal control quantity and fault control quantity are subjected to weighted fusion, and dynamic consistency is achieved through pole matching and reference pre-alignment; the intermediate capacitor voltage fluctuation is significantly reduced, the recovery time is shortened, and the system stability and reliability are improved.

The invention relates to the technical field of micro-grids, and discloses an AC micro-grid distributed power control method with quantitative event triggering. According to the method, due to droop control in an island DC micro-grid, distribution of reactive power and unbalanced power in a system cannot be guaranteed, and a distributed control method with quantitative event triggering is provided for solving the problem. According to the control scheme provided by the invention, communication is reduced on the basis of realizing reactive power and unbalanced power distribution among distributed power generation units by adding a designed distributed secondary controller with a quantitative event triggering method, and parts which cannot be accurately distributed can be readjusted by a negative feedback system through PI control; in addition, the proposed method does not need global power information, each distributed generator only communicates with a neighbor when meeting a triggering condition, the communication burden of a micro-grid communication network is greatly reduced, the stability of the method is proved through a Russell invariant set principle, and Zeno behaviors are also eliminated through an anti-security method.

The invention discloses a power distribution network short circuit fault diagnosis method and device based on a heterogeneous graph attention network and a medium, and belongs to the field of power system protection and control, and the method comprises the steps: building a heterogeneous power distribution network topological graph structure, and measuring the electric data of each node in the power distribution network topological graph; preprocessing the measured electric data and constructing a fault data set; constructing a power distribution network short-circuit fault diagnosis model based on the heterogeneous graph attention network; defining a training hyper-parameter and a loss function of the power distribution network short-circuit fault diagnosis model, and training the power distribution network short-circuit fault diagnosis model; and when a power distribution network fault occurs, preprocessing real-time measurement data, and inputting the data into the optimal power distribution network short-circuit fault diagnosis model to obtain prediction results of a node fault state, a fault category and a fault phase. According to the method, the fault of the power distribution network can be accurately and effectively diagnosed under the condition of distributed power supply deployment, and the method has relatively high diagnosis accuracy and robustness.

The invention is suitable for the technical field of wind power generation equipment, and provides a distributed power generation vertical shaft fan which comprises a fan support, a main transmission shaft, a fan main shaft base, a wind power detection device and at least one distributed power generation unit. The fan impeller is divided into a spiral impeller structure and a lift-drag composite impeller structure, the distributed power generation unit comprises a power generation device base and a main driving outer gear, the power generation device base is rotationally provided with a plurality of power generation driving gears, and the power generation driving gears are meshed with the main driving outer gear; the power generation driving gear is in driving connection with the distributed generators through the power generation driving shaft, the main transmission shaft drives the main driving outer gear to drive the distributed generators to generate power, the electromagnetic clutch is arranged between the power generation driving shaft and the distributed generators, and the number of the distributed generators connected to the load can be flexibly adjusted according to working conditions. And maximum utilization of energy is realized.

The invention discloses a multi-microgrid intelligent power distribution system joint optimization operation method based on energy interaction, and the method comprises the following steps: 1), taking the minimum total operation cost of the power generation cost, the environment cost and the power exchange cost between the power generation cost and a power distribution network as a target, and building a bottom layer multi-microgrid system optimization model; 2) constructing an optimization model of an upper-layer intelligent power distribution system, considering the cost of power purchase of an upper-layer power grid, the cost of controllable distributed power generation, the cost of load demand response compensation and the cost of interaction with a multi-microgrid system, and establishing a model by taking the minimum total operation cost and the minimum payload peak-valley difference of the intelligent power distribution network as targets; 3) converting the upper-layer model and the lower-layer model into a second-order cone programming problem and a mixed integer linear programming problem respectively by using a second-order cone relaxation method and a linearization method to solve the two-order cone programming problem and the mixed integer linear programming problem; according to the invention, the operation cost of the intelligent power distribution system and the multi-microgrid system can be reduced, the load fluctuation condition of the intelligent power distribution system is reduced, and the electric energy quality of the intelligent power distribution system is improved.

The invention provides an overhead line power supply reliability assessment method and device considering a distributed power supply. The method comprises the following steps: acquiring an assessment parameter set of a first line; calculating the evaluation parameter set according to a preset evaluation method to obtain the number of households during first power failure and the number of households during second power failure; obtaining the total number of lines and the total number of users corresponding to the medium-voltage overhead line set; determining a third number of households during power failure according to the total number of lines, the first number of households during power failure and the second number of households during power failure; the third number of households during power failure represents the number of households during power failure of all medium-voltage overhead lines; determining the average power failure time of the users according to the number of households in the third power failure and the total number of the users; and determining the target power supply reliability corresponding to the medium-voltage overhead line set according to the user average power failure time. Various evaluation parameters can be comprehensively considered, so that the accuracy of power supply reliability evaluation of the medium-voltage overhead line is improved.

The application discloses a kind of kiln flue gas waste heat grading circulation power generation method and system, adopt multi-stage purification and temperature utilization combination, first, kiln flue gas is carried out component analysis and desulfurization purification treatment, establish layered purification chain and identify acid dew point area, form safe purification flue gas area by material adaptability evaluation and corrosion control measure;Then, temperature gradient analysis and temperature field reconstruction are carried out to purified flue gas, establish heat grade distribution mechanism and form cascade thermal energy flow, realize the complementary use of different temperature section heat source;Further, build the cascade power generation system of water vapor main cycle and organic working medium auxiliary cycle, integrate magnetic suspension bearing technology to improve auxiliary cycle power generation efficiency;Through heat matching degree monitoring and mismatch detection, establish heat balance parameter and optimize circulation network;Finally, build energy transfer matrix, through generator coupling analysis and speed coordination control, form distributed power generation configuration and complete stable electric energy output, realize the efficient use of waste heat.

The invention discloses a virtual power plant-oriented multi-resource aggregation participation power grid regulation potential evaluation method, and relates to the technical field of virtual power plant management, and the method comprises the steps: carrying out the resource classification of a virtual power plant, and analyzing the resource characteristics; performing fine evaluation on the resource scheduling potential of the virtual power plant; and calculating a virtual power plant resource scheduling potential value, and issuing a regulation and control instruction. According to the virtual power plant-oriented multi-resource aggregation participation power grid regulation potential evaluation method provided by the invention, aggregation and classification management of distributed photovoltaic, energy storage systems, controllable loads, electric vehicles and other dispersed resources and characteristic analysis of flexible loads, distributed power generation resources and source loads are carried out; the virtual power plant can provide more flexible power grid regulation services, such as frequency regulation and peak reduction, and can optimize resource configuration, more reasonably dispatch the resources and improve the use efficiency of the resources at the same time.

The invention discloses a flexible interconnection power distribution network voltage optimization control method considering flexible interconnection switch access, and belongs to the technical field of power system operation control, and the method comprises the steps: 1, building a target function considering the total voltage deviation, the total line loss, the total loss cost of a flexible interconnection switch and the net load deviation of a power distribution network; 2, establishing an overall model of the flexible interconnection power distribution network voltage optimization control method considering the flexible interconnection switch and the distributed photovoltaic access; and 3, solving the overall nonlinear optimization model by using a second-order cone programming algorithm to obtain a voltage optimization control result. According to the invention, the voltage of the power distribution network can be optimally controlled by accessing the flexible interconnection switch into the flexible interconnection power distribution network, and the problems and phenomena of instantaneous heavy load or overload of the power distribution network, insufficient existing capacity utilization rate, insufficient distributed power generation permeability and the like are obviously improved.

The invention provides a distributed optimal scheduling method and system for an AC / DC power distribution network. The method comprises the following steps: acquiring load data, distributed power supply output data and energy storage state data of a local node based on a first local intelligent controller; performing a local optimization decision based on the first local intelligent controller according to the local optimization objective function in combination with the load data, the distributed power supply output data and the energy storage state data to obtain a preliminary local scheduling decision; based on each first local intelligent controller, performing consistency collaborative optimization according to the first interaction information and second interaction information of the second local intelligent controller, and determining a target local scheduling decision; and performing distributed collaborative optimization according to the target local scheduling decision of the target local intelligent controller based on each regional coordinator, determining a node scheduling decision of a node corresponding to the target local intelligent controller, and realizing peak-valley difference optimal scheduling of the AC / DC power distribution network. The overall operation efficiency and stability of the power grid are improved.

The invention relates to the technical field of electric power, and discloses an initial black-start frequency and voltage distributed optimization control method and system in a virtual power plant mode, and the method comprises the steps: building a virtual power plant structure relation, and reducing the state difference between adjacent agent nodes of a distributed multi-agent system until the state of each node is converged to a consistent value; establishing an initial black-start control model of the distributed new energy of the virtual power plant by taking the minimum transient frequency and the minimum voltage deviation value as optimization objectives; and overall optimization and power scheduling of initial black-start voltage and frequency control of the distributed power supply cluster are carried out through a consistency algorithm in combination with a hierarchical control mode. The method not only has better control stability, but also has stronger robustness and reliability for operation scenes such as new energy output fluctuation and unit random commissioning and quitting.

The invention belongs to the technical field of solid oxide fuel cells, and discloses a perovskite-spinel composite material and application thereof. The perovskite-spinel composite material is prepared from the following raw materials: perovskite powder, spinel powder, an adhesive and a dispersing agent, the structural formula of the perovskite powder is LaxSr (1-x) CoO3, and x is more than or equal to 0.6 and less than or equal to 0.8; the mass ratio of the perovskite powder to the spinel powder is (3-1): 1. The perovskite-spinel composite material provided by the invention can be used in the assembly of a solid oxide fuel cell stack, can be used as a cathode collector layer of a cell and a protective layer of a connector, can effectively improve the electrochemical performance and long-term stability of the solid oxide fuel cell stack, has wide application potential in the field of power generation devices, and can be widely applied to the field of power generation devices. The perovskite-spinel composite material and the solid oxide fuel cell stack can be applied to preparation of auxiliary or power sources of distributed power generation and fixed power stations, vehicles or unmanned aerial vehicles, and the preparation process of the perovskite-spinel composite material and the solid oxide fuel cell stack is simple, easy to operate, low in cost, short in period and suitable for mass production.

The invention provides a centralized megawatt-level autonomous grid-connected device, system and control method, and relates to the technical field of energy routers wherein the centralized megawatt-level autonomous grid-connected device comprises an energy router and a photovoltaic controller; an alternating current port of the energy router is used for accessing a power grid; a plurality of direct current ports of the energy router are used for being connected with a distributed power generation device; a plurality of power modules in the energy router adopt an H-bridge cascade structure, and direct current buses of the plurality of power modules are connected together to form a common direct current bus; the common DC bus is connected with an external photovoltaic array through a photovoltaic controller. According to the invention, the CHB topological structure is adopted to directly hang the power grid, the conversion from the AC port to the DC port is realized, the photovoltaic controller is matched, the centralized photovoltaic access of the power grid side is realized, the difference of the access grid-connected modes of the high-proportion distributed power generation device is simplified, the data information interaction real-time performance is higher, and the regional autonomous coordination difficulty is reduced.

This invention discloses a UPS power supply system and control method based on hydrogen fuel cell distributed power generation, relating to the field of power supply circuit technology. The system includes a safety and control module, a control execution module, a front-stage bidirectional DC-DC converter module, and a rear-stage bidirectional DC-DC converter. The safety and control module is used to determine whether the proton exchange membrane (PEM) shows signs of dehydration or flooding. The control execution module controls the air compressor to perform pulsed water blowing on the PEM. The front-stage bidirectional DC-DC converter module switches the front-stage converter to current closed-loop mode. The rear-stage bidirectional DC-DC converter switches the rear-stage converter to either a boost or buck topology. This invention, by determining whether the PEM shows signs of dehydration or flooding, maximizes the net output efficiency and ensures high-reliability continuous operation of the UPS power supply system under all dynamic operating conditions, solving the problem of significantly reduced operating efficiency in existing UPS power supply systems.

The invention discloses a method for distributed photovoltaic reactive power compensation, which belongs to the field of photovoltaics, and the method steps are as follows: S1, investigate the capacitance capacity Q of the capacitor cabinet before the factory; S2, connect the intelligent composite switch in series with each group of capacitors; S3, reliably connect the intelligent composite switch with the four-quadrant functional reactive controller, and realize the automatic adjustment of the four-quadrant functional reactive controller and 18 groups of capacitors; S4, calculate the reactive power compensation capability range value Qi that the photovoltaic inverter can provide; S5, after the four-quadrant functional reactive controller detects the power factor of the second bus, it completes the primary adjustment; S6, when the AVC system detects that the power factor of the first bus meets the standard value, it does not issue instructions to each group of photovoltaic inverters; S7, when the AVC system detects that the standard value is not met, the secondary adjustment of the power factor of the factory is realized. The invention improves the utilization rate of distributed power generation and improves the profit of power generation operation; it has an alarm reminder function, avoids the waste of effective resources, and saves the investment of funds.