41 results about "Distributed power systems" patented technology

The invention discloses a micro-grid optimization scheduling method based on an improved Loueer fox algorithm, relates to the technical field of micro-grid operation, and realizes collaborative optimization scheduling of a distributed power supply, an energy storage device, a load and the like in a micro-grid system by simulating various perception and behavior strategies of the Loueer fox. Aiming at the demand of distributed power supply system micro-grid optimization scheduling, the micro-grid system operation economy is taken as a main target, a function corresponding to a micro-power supply scheduling scheme is constructed, improvement is carried out based on an RFO algorithm, and a quantum fractal annealing disturbance strategy, a hyperbolic tangent self-adaptive olfactory disturbance strategy and a Riemannian metric accumulation disturbance strategy are introduced, so that the optimal scheduling of the micro-power supply system is realized. Through the fusion of the triple innovation strategies, the defects of poor population diversity, easy premature convergence, insufficient balance capability, low precision and the like when the original RFO algorithm and the traditional intelligent algorithm are used for solving the complex optimization problem are solved, and the efficient solution of the micro-grid optimization scheduling scheme is realized.

The invention discloses a distributed power supply-based control method, system, equipment and medium, and relates to the technical field of distributed power supply control, and the method comprises the steps: collecting and preprocessing the real-time data of a distributed power supply, training a prediction model to optimize parameters, obtaining a load demand and power generation capability estimation, and adjusting the power based on a prediction result. Distributing active power according to a total load and a power contribution factor; setting a target power factor to calculate reactive power; monitoring voltage and load changes of a power grid in real time; dynamically selecting and adjusting a reactive power control strategy; and visualizing the running state and backing up the data to a database. Through closed-loop cooperation of data prediction, dynamic power control, value-oriented intelligent operation and maintenance and visual management, the stability, electric energy quality, operation and maintenance economy and management efficiency of the distributed power supply system are comprehensively improved.

The present invention provides a distributed power generation system, a control method for the distributed power generation system, and an output control device that can more appropriately reduce the amount of electricity purchased from the power grid and more effectively utilize the generated electricity. [Solution] A distributed power system is provided, comprising: a distributed power source; a power converter that converts the power supplied from the distributed power source into AC power corresponding to the load and supplies the converted AC power to the load; an output control device that controls the operation of power conversion by the power converter; and a power generation forecasting device that stores a power generation forecasting model that enables the prediction of the amount of power generated by the distributed power source based on weather forecasts at the locations where the distributed power source is installed, predicts the amount of power generated by the distributed power source after a predetermined time based on the weather forecasting data and the power generation forecasting model, and outputs power generation forecasting information including the predicted value of the amount of power generated, thereby enabling the planning of the demand power required by the load in advance.

To provide a power conversion device, a control device, and a distributed power supply system that can improve the resistance to noise in measured values while also improving the ability to track changes in system characteristics.SOLUTION: The power conversion device includes a main circuit unit that converts the power from distributed power sources into AC power that can be used by a power grid and a control unit that controls the operation of the main circuit unit. The control unit has an estimated value calculation unit that calculates an estimated value of a resistance component of system impedance of the power grid, an estimated value of a reactance component of the system impedance, and an estimated value of a voltage value of an infinite bus power grid. The estimated value calculation unit has an estimation unit that calculates the estimated value of the resistance component, the estimated value of the reactance component, and the estimated value of the voltage value by applying a covariance matrix adaptive evolutionary strategy to period data that includes multiple active power values, multiple reactive power values, and multiple voltage values for a given period.SELECTED DRAWING: Figure 1

To provide a technology for integrally operating a plurality of distributed power supply systems in conjunction with each other.SOLUTION: A distributed power supply system that is interconnected with a commercial power system and supplies power to a load, the distributed power supply system comprising: a first power supply system including a first storage battery and a first power conditioner; a second power supply system including a second storage battery and a second power conditioner; and an operation control for performing at least one of first operation control for charging and discharging the first storage battery and the second storage battery in accordance with a preset priority order or second operation control for transferring power between the first storage battery and the second storage battery; And a controller configured to instruct the first power conditioner and the second power conditioner to perform operation control.SELECTED DRAWING: Figure 1

The present invention relates to a distributed power system using a flow battery, the system comprising: a stack accommodation unit in which a stack included in a flow battery is accommodated for durability and assemblability of the stack; an environment creation unit for providing a set environment to the stack; an efficiency improvement unit for improving the energy efficiency of the stack and the lifespan of the flow battery; a maintenance unit for performing maintenance on components of the flow battery by using artificial intelligence; a facility construction unit for constructing an ESS facility of the flow battery on the basis of a digital twin; and a control unit connected to each of the stack accommodation unit, the environment creation unit, the efficiency improvement unit, the maintenance unit, and the facility construction unit so as to control operations of the stack accommodation unit, the environment creation unit, the efficiency improvement unit, the maintenance unit, and the facility construction unit.

The invention discloses a high-precision synchronization method and system for a distributed power system, the method comprises a host and a plurality of sub-machines which are interconnected with the host in a point-to-point manner and are to be synchronized, the host and the sub-machines both adopt a CPU + FPGA architecture, and a high-precision synchronization mechanism is realized in the FPGA. According to the synchronization mechanism, synchronization compensation time and synchronization errors are calculated through a plurality of message sending periods, the step length of an interval is adjusted in a self-adaptive mode by comparing the synchronization errors with a reasonable range, and high-precision synchronization of the master machine and the slave machine is carried out. Under the condition that the processor is non-inductive, extremely high synchronization precision is achieved through extremely low network overhead occupation, the complexity and cost of distributed system synchronization design construction are reduced, and the method has high engineering application value.

The present application relates to the technical field of aircraft control, and discloses a distributed power ground effect aircraft convenient to control and a control method thereof; the present application replaces traditional rudder control with a distributed power system, realizes full-range efficient control from static to high speed, and directly generates multi-dimensional control torque through power difference by adopting independent control of positive and negative rotors in cooperation with differential adjustment, so that not only the failure defect of traditional rudder at low speed stage is completely eliminated, but also precise attitude adjustment and in-place turning are completed at zero airspeed, and the response capability of the aircraft in a complex environment is improved; in combination with air cushion effect optimization design, directional airflow of front and rear rotors forms a stable air cushion in combination with a skid structure, low-speed maneuverability is improved, a body-level turning radius is realized, and the risk of touching water is avoided. The distributed architecture simplifies the mechanical system, relies on pure electric driving, seamlessly integrates short take-off and landing, cruising and landing processes, reduces energy consumption, and enhances adaptability in narrow water areas.

This invention discloses a high-voltage spacecraft load control system applied to distributed power sources, comprising a fully regulated bus, a power supply control module, an intelligent management module, and high-voltage loads. The fully regulated bus outputs 400V to supply power to the power supply control module. The power supply control module includes multiple SSPC high-voltage control switches for performing load power supply on / off operations. The high-voltage loads include multiple 400V high-voltage loads, each connected one-to-one with the SSPC high-voltage control switches of the power supply control module. The intelligent management module is responsible for detecting the voltage of each power supply and issuing corresponding SSPC on / off commands according to the management strategy. This invention solves the safety control problem of high-voltage loads in spacecraft based on droop-controlled distributed power systems, ensuring the stable and safe operation of the distributed power bus. It is suitable for the output characteristics of droop-controlled distributed power systems and has advantages such as simple and reliable control logic, flexible intelligent control methods, fast system response, and good stability.

The present application relates to the technical field of power regulation, in particular to a power distribution area collaborative balance regulation method for a distributed power system. The method is based on the statistical irrigation pump group power consumption data and photovoltaic power generation data in a target time period to construct a photovoltaic output curve model and an agricultural area irrigation load curve model in the target time period of the current agricultural area. The correlation between the two curves is analyzed to obtain the photovoltaic power source irrigation consumption correlation coefficient. According to the photovoltaic power source irrigation consumption correlation coefficient, the power consumption matching condition of the irrigation pump group and the photovoltaic power station is determined, and then the voltage increase amount of the power grid is determined based on the power consumption matching condition, so as to obtain an effective voltage adjustment amount and ensure the safe and stable operation of the power grid. The present application analyzes the data based on the historical database, analyzes the power consumption matching condition of the photovoltaic power station and the irrigation pump group, and analyzes the accurate adjustment amount for the power grid voltage lower limit condition.

This invention provides a single-phase three-wire grid-connected inverter circuit that can suppress common noise more effectively than conventional circuits. [Solution] A single-phase three-wire inverter circuit comprising: a voltage divider circuit comprising two capacitors, with the neutral AC side connection terminal connected between the two capacitors; a first leg comprising two switching elements, connected to the first AC side connection terminal via a first inductor between the two switching elements; a second leg comprising two switching elements, connected to the second AC side connection terminal via a second inductor between the two switching elements; and a third leg comprising two sets of two switching elements, each with a diode facing in opposite directions, connected to the neutral AC side terminal via a third inductor between the two sets of switching elements, passing through the midpoint of the voltage divider path.

The present application provides an analysis method and apparatus for generating an anti-misoperation strategy on the basis of distributed power supply data, an electronic device, and a storage medium. The method comprises: collecting distributed power supply data of different power supply types, and classifying the distributed power supply data; performing real-time multi-dimensional monitoring on the classified distributed power supply data, performing mining and analysis processing on the detected multi-dimensional power supply monitoring data, and upon identification of an abnormal data point, performing data preprocessing; performing misoperation analysis processing on the preprocessed multi-dimensional power supply monitoring data to obtain a misoperation analysis result; and generating an anti-misoperation strategy on the basis of the misoperation analysis result. The analysis solution for generating an anti-misoperation strategy on the basis of distributed power supply data provided in the present application improves the accuracy and reliability of distributed power supply system data processing by combining refined classification, multi-dimensional data monitoring and depth data analysis, and prevents and reduces the risk of data misoperation, thereby improving the operation efficiency and security of power systems.

The present invention provides a power control device that reduces power loss from inverters and improves ease of installation when introducing a distributed power supply system connected to the commercial power grid. [Solution] A power control device comprising: a distribution board section having a first terminal connected to a commercial power grid and a second terminal that serves as at least a power output terminal to a load; an inverter section connected to one or more distributed power sources and converting DC power output from the distributed power sources into AC power; and a housing that accommodates the distribution board section and the inverter section.

The present invention relates to a V2X charging / discharging module for detecting an abnormality and cutting off power, and a distributed power supply system including same. The V2X charging / discharging module includes: an abnormality detection unit connected to a bidirectional charger / discharger over a network and detecting whether a power system is abnormal, whether a charger is abnormal, and whether an electric vehicle is abnormal; and an emergency cut-off unit connected to the bidirectional charger / discharger over the network and turning off a plurality of switches when the abnormality detection unit detects an abnormality in any one of the power system, the bidirectional charger / discharger, or the electric vehicle.

The invention provides a micro-grid adaptive optimization control method, system and equipment in a high altitude area, and relates to the technical field of distributed power system control. The method comprises the steps of obtaining environment data, operation data and communication parameters of a place where a micro-grid is located, and evaluating communication quality, operation pressure and operation stability of the micro-grid; adjusting the operation mode of the micro-grid; if the micro-grid is in the autonomous mode, the safe operation boundary of each power device is dynamically adjusted based on the current operation mode and the environment data; based on the load grading condition, an objective function is constructed with the purpose of minimizing the comprehensive operation cost of the micro-grid in the current operation mode, and constraint conditions are added for the objective function based on the safe operation boundary and power balance to form an autonomous optimization control model; and solving the model to obtain an optimal control strategy for autonomous control of the micro-grid. According to the invention, the problems of frequent out-of-limit and low operation safety of the micro-grid in the existing high-altitude area are solved.

A hybrid drive system that uses multiple sources of mechanical energy to drive an oilfield apparatus is provided. The hybrid drive system may include a first mover for generating first mechanical energy, the oilfield apparatus, a drivetrain for providing first mechanical energy from the first mover to the oilfield apparatus, and a second mover to generate and provide second mechanical energy to the oilfield apparatus. The second mover comprises an electric motor / generator. The second mover can, at times, be operable to provide excess power that can be used elsewhere at the wellsite.

This invention provides a single-phase three-wire grid-connected inverter circuit that can suppress common noise more effectively than conventional circuits. [Solution] A single-phase three-wire inverter circuit comprising: a first leg corresponding to the first phase AC side terminal, comprising two switching elements and connected to a first inductor midway between the two switching elements; a second leg corresponding to the second phase AC side terminal, comprising two switching elements and connected to a second inductor midway between the two switching elements; and a third leg corresponding to the AC side terminal related to the neutral wire, comprising two sets of two switching elements each equipped with a diode facing in opposite directions and connected to the neutral wire AC side terminal midway between the two sets of switching elements.

Techniques for managing direct current (DC) power sources are disclosed. A plurality of DC power sources is accessed. The DC power sources are configured using a series connection. The series connection is bypassed using a distributed controller-switch. Each distributed controller-switch is monitored using a system controller. The distributed controller-switch includes a bypass switch, a series switch, one or more sensors, and a communications module coupled to the system controller. The bypass switch and the series switch comprise a mutually exclusive switching connection. The mutually exclusive switching connection enables dead-zone control. An optimal DC power source configuration is computed, based on the monitoring. The DC power sources are reconfigured, based on the computing. The reconfiguring enables a level voltage and / or a level current at output terminals of the series connection. The reconfiguring enables hot swapping of one or more of the DC power sources.

The invention discloses an LC coupling inductor series connection type direct current boost converter, and belongs to the technical field of power electronic converters. The problem that an existing boost converter is poor in boost capacity is solved. An inductor, a capacitor, a diode and coupling inductors (N1 and N2) are combined in a specific series-cross connection mode to form an integrated high-gain unit. According to the invention, the turn ratio of the coupling inductor is improved and the voltage bootstrap effect of the capacitance-inductance network is utilized, so that high voltage gain can be realized under a medium duty ratio. Meanwhile, leakage inductance energy of the coupling inductor can be automatically and losslessly recycled and utilized through the specific connecting structure, voltage spikes of the switching tube and the diode are effectively restrained, voltage stress is reduced, an additional dissipative absorption circuit is not needed, and therefore the efficiency and reliability of the converter are remarkably improved while the boosting capacity is improved. The method is suitable for DC power conversion occasions requiring high step-up ratio, such as new energy power generation and distributed power supply systems.

The present application relates to the technical field of power regulation capability evaluation, and discloses a kind of flexible regulation capability evaluation method and system of distribution transformer user containing light storage and filling, the willingness of electric vehicle charging user participating in power grid regulation is determined, and the charging capacity of electric vehicle charging user participating in power grid regulation is transferred to the next period of the current calculation period within a day, so as to reasonably arrange the charging scheme, and the regulation income maximization of distribution transformer user is taken as the target condition, and the electric vehicle charging capacity of the next period of the current calculation period within a day is taken as the maximum charging capacity margin of electric vehicle regulation, the target function of charging regulation is constructed, the optimal solution corresponding to the regulation capacity determined by optimizing and solving the target function of charging regulation is used to represent the flexible regulation capability of distribution transformer user, the regulation income of distribution transformer user is guaranteed, and the calculation flexibility and precision of the flexible regulation capability of distribution transformer user are improved.

The invention discloses a real-time operation checking method for a distributed near-zero carbon emission power system, and relates to the technical field of distributed energy, and the method comprises the steps: monitoring the power state data of a power grid in real time through a sensor group, and obtaining a dynamic response data set and an output disturbance data set through data processing; and calculating a node delay behavior index Nod according to the dynamic response data set, and carrying out node behavior state evaluation. And when a control loop in the node has offset, calculating an energy flow closed residual index Tfl according to an output disturbance data set, and fitting the energy flow closed residual index Tfl with a node delay behavior index Nod to calculate a comprehensive check index Zall and generate node comprehensive check evaluation. And adjusting hierarchical monitoring and operation and maintenance strategies of the nodes based on the comprehensive check evaluation result. According to the method, the abnormal state in the distributed power system is identified through multi-level real-time data analysis and node behavior evaluation, and stable operation of the power system under the target of approaching zero carbon emission is ensured through a dynamic adjustment strategy.

The invention relates to the technical field of power electronics and distributed power systems, in particular to a current sharing control method and system based on virtual angular frequency and virtual reactive power. A double-droop architecture of current-virtual angular frequency droop and virtual reactive power-voltage droop is set, and a double-closed-loop structure of a virtual angular frequency loop and a real voltage-current double loop is adopted, so that a modulation signal is generated. Through the control method and system, high-precision current sharing without voltage drop can be realized through local control on the premise of completely not depending on continuous communication between power supply modules, and meanwhile, the dynamic response speed and stability of the system are ensured.

A power control method according to the present disclosure includes: supplying power to a power load of a power consumer from a distributed power supply system including a solar power generation device, a fuel cell device, and a power storage device; the value equal to or less than the difference between the sum of the actual power demand of the power consumer and the chargeable power equal to or less than the maximum charging power of the power storage device and the actual power generation of the fuel cell device is set as the power generation upper limit value of the solar power generation device.

A frequency detector detects a system frequency from an AC voltage on an AC power line to which a power conditioner performing system interconnection of a distributed power supply is connected. A power converter is configured to inject lead reactive power or delay reactive power into the AC power line. A controller controls reactive power output from the power converter to output the lead reactive power in response to an increase in the system frequency while outputting the delay reactive power in response to a decrease in the system frequency.

Systems and methods for supplying stable electrical power using an alternating energy storage architecture under supervisory control. Systems and methods may include at least two energy storage modules, an electrical bus configured to deliver power to a load, a motor-generator assembly coupled to the electrical bus, and a feedback distribution system configured to route a proportion of electrical power produced by the motor-generator assembly back to at least one energy storage module. An intelligent control system alternates discharge and recharge roles between the energy storage modules such that one module supplies power while another module is charged and maintains each energy storage module within a bounded state-of-charge envelope. The feedback distribution system is selectively engaged to reduce effective energy loss while maintaining stable power delivery. The systems and methods may apply to telecommunications towers, distributed power systems, microgrids, and other environments requiring reliable electrical power.

The invention provides a communication delay compensation method for real-time simulation of a spatially distributed power system, and the method comprises the steps: obtaining the communication delay time between a transmitting end simulation host and a receiving end simulation host, and the current electric quantity data received by the receiving end simulation host at the current simulation step length; according to the communication delay time, the current electrical quantity data and historical electrical quantity data of the receiving end simulation host, an electrical quantity predicted value of the next simulation step length is generated by utilizing a target fitting function, and the electrical quantity predicted value serves as input data of the receiving end simulation host at the next simulation step length and is used for compensating data vacancy caused by communication delay; and calculating a prediction error value according to the next electrical quantity data and the electrical quantity prediction value received by the receiving end simulation host at the next simulation step length, and optimizing the target fitting function by adopting the prediction error value so as to continuously generate the electrical quantity prediction value by adopting the optimized target fitting function. According to the method, the time consistency of cross-node data and the stability of the whole system are ensured.

A protection method in a distributed power system including of DC power sources and multiple power modules which include inputs coupled to the DC power sources. The power modules include outputs coupled in series with one or more other power modules to form a serial string. An inverter is coupled to the serial string. The inverter converts power input from the string and produces output power. When the inverter stops production of the output power, each of the power modules is shut down and thereby the power input to the inverter is ceased.

A power conversion device includes a major circuit part converting a power of a distributed power source into AC power corresponding to a power system, and a controller controlling an operation of the major circuit part; the controller includes an estimated value calculation part and a reactive power calculation part; the estimated value calculation part calculates an estimated value of a resistance component of a system impedance of the power system, an estimated value of a reactance component of the system impedance, and an estimated value of a voltage value of the infinite bus power system based on an active power value of a connection point to the power system, a reactive power value of the connection point, and a voltage value of the connection point; the reactive power calculation part calculates a reactive power command value of reactive power supplied to the power system based on the estimated values; the estimated value calculation part includes a first estimation part and a second estimation part; the first estimation part calculates the estimated values by using a Kalman filter applicable to a nonlinear equation; the second estimation part calculates the estimated values by using Newton's method. Accordingly, a power conversion device, a control device, and a distributed power source system are provided that can more appropriately suppress voltage fluctuation of a connection point of the distributed power source.

The invention discloses a risk decision engine and method for a distributed power system. The risk decision engine comprises a decision matrix construction module, a strategy generation and conflict detection module and an instruction packaging and sending module. By establishing an equipment evaluation matrix and integrating multi-dimensional data such as network security, service priority and network performance, the problems that in a traditional distributed power system, the risk execution mode is single, risk grading cannot be achieved, service continuity is difficult to guarantee, and the risk response speed is low are solved. According to the method, the strategy matching accuracy is improved by more than 40%, differential actions can be automatically triggered for different threat levels through a four-level risk control strategy, and the extensive problem of a traditional binarization strategy is avoided.