61 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 photovoltaic inverter protocol conversion adaptation method, system and device supporting group scheduling and group control, and relates to the technical field of distributed power systems, the adaptation method comprises the following steps: establishing a communication parameter vector of an inverter, and constructing a unified resource function interface model; establishing a conversion rule between an inverter communication protocol and a power communication protocol based on the communication parameter vector; according to the resource function interface model, packaging a function interface of the inverter into a remote calling service on a cloud platform service; and based on the remote calling service and the conversion rule, the power system concurrently controls instructions through a communication network so as to realize group calling and group control of the inverters. By establishing the conversion rule between the inverter communication protocol and the electric power communication protocol, automatic conversion between the local communication protocol and the electric power communication protocol of the inverter equipment can be realized, and group dispatching and group control of the inverter equipment are realized.

A distributed power system including multiple (DC) batteries each DC battery with positive and negative poles. Multiple power converters are coupled respectively to the DC batteries. Each power converter includes a first terminal, a second terminal, a third terminal and a fourth terminal. The first terminal is adapted for coupling to the positive pole. The second terminal is adapted for coupling to the negative pole. The power converter includes: (i) a control loop adapted for setting the voltage between or current through the first and second terminals, and (ii) a power conversion portion adapted to selectively either: convert power from said first and second terminals to said third and fourth terminals to discharge the battery connected thereto, or to convert power from the third and fourth terminals to the first and second terminals to charge the battery connected thereto. Each of the power converters is adapted for serial connection to at least one other power converter by connecting respectively the third and fourth terminals, thereby forming a serial string. A power controller is adapted for coupling to the serial string. The power controller includes a control part adapted to maintain current through or voltage across the serial string at a predetermined value.

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.

A computer system (which may include one or more computers) that automatically generates a plan for a power-system project is described. During operation, the computer system may receive a user query that specifies an objective or a goal. Then, the computer system may access stored information, where the stored information includes: wind data, solar data, ownership of land, energy cost, environmental conditions, connectivity, local infrastructure, regulations associated with a utility approval process, and available equipment (such as wind and / or solar equipment). Next, based at least in part on the information and the objective or goal, the computer system may automatically generate the plan for the power-system project. Moreover, the computer system may provide second information specifying the plan for the power-system project.

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.

A distributed power system includes a communication device and a control device. The communication device is configured to be disposed onboard a first vehicle of a vehicle system that also includes at least a second vehicle. The communication device is configured to communicate a discover message. The control device is configured to be operatively connected to the communication device, and, responsive to the communication device receiving a discover reply message from a second vehicle, to generate a configure message for the communication device to transmit to the second vehicle based on an identifier of the second vehicle included in the discover reply message. The configure message includes instructions for the second vehicle to transition to a remote mode of operation in which remote control of tractive and braking efforts of the second vehicle is enabled.

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.

An access control device according to one aspect disclosed herein is an access control device in a distributed energy system composed of one or more distributed power supply systems and an energy management system that controls the distributed power supply systems. The access control device comprises: a power generation state discerning unit that discerns the power generation state of each of the distributed power supply systems; and an access authorization unit that determines whether to permit or deny access to information or control functions of the distributed power supply systems according to the power generation state.

The application provides a kind of data security efficient access method and system, comprising: receiving the access request of user, receiving the access request of user;With multistage recursive aggregation search algorithm, according to access request, in turn through global index, cross-device index and dynamic local index data search is carried out, and the summary search data is obtained;With the improved block encoding homomorphic encryption method combined with data reorganization rules, the search data is fed back to the user;The application is based on global index, cross-device index and dynamic local index, improved block encoding homomorphic encryption method combined with data reorganization rules, composed of the micro-service architecture of power grid, through micro-service architecture, based on access request, carries out layer by layer search, realizes the safe and efficient access of power equipment data, effectively solves the efficient retrieval of data across regions and across devices in distributed power system, solves the problem of safe transmission of data.

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 application relates to the technical field of power system simulation, and solves the problem that there is currently a lack of corresponding overall performance calculation models of complete machines developed according to the layout characteristics of distributed power systems, specifically an engine overall simulation modeling method and system based on a distributed power system, and an overall performance calculation model of a tip turbine fan engine is established, which comprises the following steps: modeling each component along the airflow direction; using a design point algorithm and a non-design point algorithm to establish the overall performance calculation model; and establishing an air generator-tip turbine fan engine overall calculation model, which comprises the following steps: performing overall performance calculation of the air generator; taking the air supply parameters as the internal content air intake parameters of an auxiliary engine, and using the overall performance calculation model of the tip turbine fan engine to complete simulation calculation. A mathematical calculation model of a tip turbine fan engine suitable for simulation design of a distributed air path connected power system of a vertical / short take-off and landing aircraft is established.

The invention discloses a voltage control method and device for a distributed power system, terminal equipment and a storage medium, and belongs to the field of power systems, and the method comprises the steps: generating GPON package data based on a preset control field and bus real-time voltage data of the distributed power system; transmitting the GPON packaging data to an optical line terminal, and obtaining a packaging data sending timestamp and a packaging data receiving timestamp; carrying out fixed propagation delay compensation on the basis of the acquisition timestamp to obtain an encapsulation data compensation sending timestamp, and correcting bus real-time voltage data in the GPON encapsulation data on the basis of real-time delay to obtain bus correction voltage; the reactive power adjustment amount is calculated based on the bus correction voltage, and the reactive power adjustment instruction is generated according to the reactive power adjustment amount so that the distributed power system can be adjusted, and therefore the problem that in the prior art, the voltage adjustment accuracy of the distributed power system is low can be solved.

The embodiment of the application provides a kind of island detection method and device, it is related to circuit technical field, it can be applied to the direct current distributed power system including multiple distributed power supply units, multiple distributed power supply units are all accessed direct current bus;Each distributed power supply unit includes the converter for connecting power supply equipment, the input end of converter is connected power supply equipment, the output end of converter is accessed direct current bus, method includes: determining the current component at target port is less than or equal to first threshold;Wherein, target port is the port of converter access direct current bus;Target frequency disturbance current is injected to target port, and island detection is carried out according to disturbance current.This way, when injecting current disturbance of target frequency to power supply equipment, the current component at the target port of the power supply equipment access bus is less than or equal to first threshold, can avoid the offset of current component to the disturbance injected, to improve the accuracy of island detection result.

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 invention discloses an uncertain distributed power supply control method, system, equipment and medium, and the method relates to distributed power supply modeling, renewable energy source permeability, load flow calculation and transformer tap selection, and solves the negative influence of the randomness and volatility of renewable energy sources on the safe and stable operation of a distributed energy system. And the operation mode of each device in the distributed energy system is single, and the operation scheme is too conservative. The method comprises the following steps: 1, establishing a distributed power supply model; 2, establishing a renewable energy output prediction model, a load prediction model and an uncertainty model thereof according to the renewable energy historical data and the load historical data; and 3, based on the system power flow under multiple uncertainties, selecting a transformer tap, optimizing an energy storage operation strategy, and realizing effective control of the distributed power supply. The basic idea of the invention is to provide support for the operation control of the distributed power supply system from the aspects of safety, reliability, node voltage and the like.

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 a distributed power system collaborative fault diagnosis method based on federated learning, relates to distributed power fault prediction and health management, solves the problem of diagnosis threshold drift caused by non-independent identically-distributed samples, and is characterized in that fault data differences collected locally are taken as the basis, confidence gradient distribution of each node is molded through resampling, and a fault diagnosis result is obtained. Adjusting a merging mode by using an index reflecting a difference degree, so that a judgment standard of the shared model is not dominated by common faults any more; then, only rare fault categories are subjected to directional fine adjustment, model offset is measured through changes before and after fine adjustment, and a merging strategy is corrected through feedback, so that the diagnosis model is continuously self-calibrated when facing data distribution changes; therefore, false alarms and missing alarms are reduced at the same time, threshold drift is restrained, collaborative diagnosis results are stable and consistent, fault prediction is earlier and more accurate, health state evaluation is more reliable, and meanwhile data privacy and communication conciseness under a distributed architecture are reserved.