297results about "Selective ac load connection arrangements" patented technology

The invention relates to the technical field of automation and intelligent operation and maintenance of a power system, in particular to a knowledge graph-fused reinforcement learning switching operation anti-error verification method, which systematically extracts a multi-dimensional anti-error rule covering an operation sequence, an equipment state and an electrical safety distance by constructing an operation ticket knowledge graph, and improves the accuracy of the operation ticket knowledge graph. The defect that a traditional single-station anti-error system is incomplete in rule coverage is overcome, meanwhile, in combination with deep mining of a reinforcement learning model on historical operation data, implicit anti-error rules can be automatically extracted, illegal scenes which are not covered by a traditional rule base are supplemented, overall-process and multi-level accurate verification of switching operation is achieved, and the verification efficiency is improved. And the risks of misoperation and missing detection are greatly reduced.

Disclosed in the present invention are an optimization-based regulation and control method and apparatus for distributed energy storage, a device, and a storage medium. The method comprises: on the basis of current weather parameters, constructing an extreme weather model; determining a plurality of faulted and out-of-service elements in which faults will occur in a power distribution network; then on the basis of the faulted and out-of-service elements, system parameters of a distributed energy storage system, and an operation parameter of the power distribution network, constructing a dual-objective optimization model taking load loss minimization and power failure time minimization as objectives; and finally, solving for the dual-objective optimization model to generate an optimal regulation and control scheme applied to the distributed energy storage system. Therefore, when a fault has occurred in the power distribution network, the distributed energy storage system is regulated and controlled by means of the optimal regulation and control scheme, such that power supply of the power distribution network is restored as soon as possible in extreme typhoon weather, and the transient power deficit of the power distribution network is made up promptly. Therefore, the present invention can effectively guarantee the safe operation of power distribution networks under the condition of extreme typhoon weather.

An electrical line selection system comprising a circuit module configured to connect energy sources with multiple line outputs. The circuit module has a number of inputs configured to connect to energy sources, including rechargeable battery systems, and a number of outputs configured to connect with other electrical systems such as other battery systems, loads, charging sources, and various AC or DC power supplies. A switching circuit is contained by the circuit module and a controller manages the switching circuit based on desired connections and strategies for managing power supplies and current sinks.

Responsive to a voltage across a capacitor being greater than a voltage across a traction battery, a controller may open switches such that charge current from a DC charger flows through a diode to the traction battery without following through coils of an electric machine and without flowing through an inverter.

The present disclosure describes systems for providing electrical power that are modular, upgradable, and customizable. Systems described herein can be used to create modular, upgradable, and customizable charging stations for charging electric vehicles. In one example, a sub panel module can be electrically connected to a main input line that provides an alternating current power supply, and includes a plurality of electrical outlets, and a plurality of breaker switches Each breaker switch is electrically connected to one or more of the plurality of electrical outlets and can be electrically connected to the main input line.

The invention relates to a power equipment load scheduling optimization method and device. The method comprises the following steps: carrying out load operation data acquisition through monitoring units deployed in power equipment to obtain a distributed load operation data set, and obtaining strategy game relationship network data between the equipment based on the distributed load operation data set; obtaining initial load adjustment intention intensity data of each power device according to the policy game relationship network data between the devices; sending the initial load adjustment intention intensity data and the global collaborative scheduling optimization target to a distributed negotiation chain to obtain final load adjustment strategy data after negotiation consensus; and obtaining an optimized distributed load scheduling model according to the final load adjustment strategy data after negotiation of the consensus, distributing the optimized distributed load scheduling model to each power device, and executing decentralized power device load scheduling optimization. By adopting the method, the load scheduling of the power equipment can be optimized.

The invention discloses a transformer area intelligent interconnection device with a fast charging function and a control method thereof. The device mainly comprises a first current transformation module, a second current transformation module, an all-solid-state energy storage battery, a direct current charging module and a collaborative energy manager (EMS). The DC sides of the two converter modules, the energy storage battery and the input end of the charging module are all connected to a common DC bus, and the AC sides are respectively connected to the low-voltage sides of different distribution transformers. Through uniform control of the EMS, three core functions are realized: 1, during normal operation, the two converter modules are controlled to carry out power mutual assistance and reactive power regulation, the transformer load is balanced, and the voltage of the transformer area is optimized; secondly, the direct current charging module is used for rapidly charging the electric vehicle, and an energy storage battery is used for stabilizing charging power impact; and 3, when the power grid fails, switching the converter module to a grid construction mode, and establishing an island micro-grid in cooperation with the energy storage battery to guarantee power supply of a key load. According to the invention, the integration level is high, and intelligent cooperation and autonomous operation of source-network-load-storage-charging of the transformer area are realized.

The invention discloses an integrated power supply system and a scheduling method thereof, and belongs to the technical field of power supply systems, and the method comprises the steps: collecting the operation state data of a micro-grid in real time; establishing a storage battery stress factor table, identifying an effective charge-discharge cycle, calculating a life loss value, and converting the life loss value into life loss cost; the method comprises the following steps of: constructing an optimization model containing life loss cost by taking minimization of total operation cost as a target, and generating an optimal scheduling instruction set in each scheduling period by adopting a model prediction control framework and an improved particle swarm optimization algorithm. According to the invention, through real-time quantitative evaluation and optimal scheduling of the service life of the storage battery, the economy and reliability of the whole life cycle of the system are improved.

A power distribution system includes a macrogrid controller configured to control one or more first loads associated with a macrogrid, wherein the one or more first loads include a microgrid comprising one or more second loads and a plurality of energy resource systems; and a microgrid controller configured to receive one or more control signals from the macrogrid controller and control a power connection of the microgrid to the macrogrid based on the one or more control signals. The microgrid controller is configurable in a grid-connected mode, during which the microgrid is connected to the macrogrid, and a stand-alone mode, during which the microgrid is disconnected from the macrogrid, and wherein the microgrid controller is configured to operate in the grid-connected mode or in the stand-alone mode based on the one or more control signals.

A server manages power balancing resources electrically connected to a power network. The server includes a processor. In response to receipt of input of a travel schedule including a date and time of travel, a departure point, and a destination point from a user of the vehicle, the processor predicts a power supply and demand balance on the power network for the date and time of travel, based on power supply and demand performance information of the power network. In response to prediction that the power supply and demand balance is going to be adjusted on the date and time of travel, the processor provides the user suggestion to keep the vehicle connected to the power equipment on the date and time of travel and a reward for the vehicle responding to a request to adjust the power supply and demand balance.

The present teachings relate to an electrical device comprising: a first electrical power input; a second electrical power input; an electrical power output; a switching circuit operable to route electrical power from the electrical power inputs to the electrical power output; the switching circuit comprising: a first switching element activable to facilitate delivery of electrical power from the first electrical power input to the electrical power output; and a second switching element activable to facilitate delivery of electrical power from the second electrical power input to the electrical power output; a controller operable to control the switching circuit to switch to the first electrical power input or the second electrical power input for selecting which of said electrical power inputs is to supply electrical power at the electrical power output; wherein the electrical device is operable to determine a timing sequence of switching between the first electrical power input and the second electrical power input. Related circuits, methods and software products are also disclosed.

The invention relates to a transformer substation bus-level adjustable load potential evaluation and hierarchical regulation and control method and system for regional differences, and belongs to the technical field of intelligent power grid regulation and control. The method comprises the steps of obtaining transformer substation bus load data, and performing missing value processing on the transformer substation bus load data through a data missing processing model to obtain bus load reference data; performing curve clustering on the bus load reference data to obtain a load characteristic curve; performing potential evaluation based on the load characteristic curve and outputting a bus load potential evaluation result; and constructing a regional aggregation load characteristic model, and outputting an optimal load regulation and control strategy through hierarchical regulation and control according to the regional aggregation load characteristic model and a bus load potential evaluation result. And transformer substation bus-level adjustable load potential evaluation and hierarchical regulation and control oriented to regional differences are realized.

The invention discloses a power grid flexibility resource aggregation method and device, and aims at user side distributed flexibility resources, a technical constraint model of the user side flexibility resources is constructed, an internal approximation flexibility aggregation method is introduced, and on the basis of power grid topology and operation constraints, in the same node, the user side flexibility resources are aggregated. Homogeneous aggregation is carried out on similar flexible resources of a user side, heterogeneous aggregation is carried out on different types of flexible resources of a cross-node user side, node flexible resource aggregation of multi-type and large-scale distributed flexible resources is realized, and actual distribution of the flexible resources is fitted. The technical problems that an existing power grid flexibility resource aggregation method neglects the network topology constraint of a power grid, all distributed flexibility resources are considered to be centrally accessed to the same node for simplified modeling, the modeling is not consistent with the actual distribution characteristics of the flexibility resources, and the engineering feasibility of the model is limited are solved.

The invention relates to the technical field of energy storage converters, and discloses a grid-connected and off-grid switching photoelectric control device for PCS (Power Control System) equipment, which is characterized in that a double-isolation barrier of a power grid side and a control side is constructed through photoelectric isolation and photoelectric conversion processing of a control signal between a main controller and a power grid controller; intrusion paths of interference signals such as voltage fluctuation and surge are thoroughly blocked, a control loop is prevented from being influenced by electromagnetic coupling interference from the source, the risk of false triggering of a control instruction is effectively reduced, and stability and accuracy of control signal transmission in a complex power environment are ensured.

The invention discloses an electric power metering and electric charge accounting system based on multi-source data and an intelligent algorithm, and relates to the technical field of intelligent power grids, and the system comprises the following steps: S1, constructing a multi-source power credibility weighted fusion model, and outputting multi-source credibility weighted fusion power; s2, performing section-level correction and equivalent electric quantity calculation on electric energy flow in the current settlement time slice; s3, constructing a user side clearing electric quantity model, and dynamically calculating the clearing electric quantity of the user; s4, constructing an electric charge cardinal model, and dynamically pricing the sorted electric quantity; s5, the obtained electricity charge cardinal number is optimized; and S6, establishing an anomaly identification and dynamic verification mechanism. According to the invention, a credible fusion mechanism of multi-source heterogeneous data is constructed, self-calibration modeling of a metering point topological structure is realized, a precise clearing method oriented to user contracts and line loss is introduced, and a full-link intelligent system is formed in combination with a strategy-driven electricity charge accounting model and a cross-cycle consistency anomaly detection mechanism.

The invention discloses a forest power grid optimization operation method and system in a forest fire scene, and the method comprises the steps: firstly constructing a forest power grid optimization operation model in the forest fire scene, considering the influence of smoke and high temperature generated in the forest fire scene on a power grid line, a traffic network and renewable energy output, and making full use of mobile energy storage resources; and solving the forest power grid optimization operation model in the forest fire scene to obtain an optimization operation strategy of the forest power grid in the forest fire scene, including a source-load-storage operation scheme of each node of the forest power grid. According to the method, when the forest power grid optimization operation model in the forest fire scene is constructed, various conditions, including influences of generated smoke and high temperature on a power grid line, a traffic network and renewable energy output, on the forest power grid in the forest fire scene are fully considered, and the power supply interruption cost of loads with different importance degrees is synthesized, so that the forest power grid optimization operation model in the forest fire scene is constructed. On the basis of flexibly optimizing source-load-storage operation of each node, mobile energy storage is utilized, the power recovery efficiency after disasters is improved, and light abandoning and wind abandoning amount are reduced while the power supply interruption cost of the system is reduced.

The application discloses a communication base station power supply voltage control energy-saving system and method based on communication load. The system comprises a cloud platform, an energy storage battery, a line switching unit, a voltage control unit, and a commercial power grid. The commercial power grid supplies power to the energy storage battery and an antenna in the communication base station through the voltage control unit, and the energy storage battery supplies power to the antenna through the voltage control unit. The line switching unit is used for controlling the on-off of the line. The cloud platform is in communication connection with a control system in the communication base station, and the control system in the communication base station is in control connection with the line switching unit and the voltage control unit. In the method, the cloud platform obtains communication base station load data and antenna load typical power data through the control system, calculates the data and transmits the calculation results to the control system, and the control system controls the line switching unit and the voltage control unit to work based on the calculation results. The application can realize low-carbon energy-saving operation of the communication base station and reduce the operation cost.

Systems and methods for load pre-charging may include a machine having one or more machine batteries, one or more machine loads, and a pre-charge circuit intermediary to the one or more machine batteries and the one or more machine loads. The pre-charge circuit may include a power resistor electrically coupled in series with the one or more machine batteries. The pre-charge circuit may include a plurality of arrays of positive temperature control (PTC) resistors, the plurality of arrays of PTCs resistors electrically coupled in parallel with one another, and in series between the power resistor and the one or more machine loads.

This invention relates to the field of distribution network dispatching and virtual power plant collaborative control technology, specifically to a distribution network load restoration method based on a multi-agent coordination mechanism under a virtual power plant. This method first models the adjustable resources of the virtual power plant to quantify its power regulation potential, then abstracts the load restoration process into a Markov decision process. Subsequently, it configures three types of agents: switch control agents, virtual power plant collaborative agents, and global coordination agents. Finally, it achieves multi-agent training and execution. This invention can fully release the power support potential of the virtual power plant, solve problems such as slow convergence of single agents, susceptibility to local optima, and spatial adaptation defects in mixed actions of multiple agents, ensure the safe operation of the power grid, and improve the flexibility, efficiency, and safety of load restoration after distribution network faults.

The invention relates to a load processing method and device under multi-dispatch joint control, power equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring a first dispatching instruction issued by a first power dispatching system, acquiring a second dispatching instruction issued by a second power dispatching system, and acquiring a current operation state of a power plant; according to an operation mode selected in the current operation state, performing multi-target scheduling distribution processing on first scheduling demand information in the first scheduling instruction and second scheduling demand information in the second scheduling instruction to obtain a scheduling distribution result for the power plant; based on the dispatching distribution result, controlling a unit of the power plant to execute load distribution processing to obtain distributed load information of the unit; and obtaining a load distribution execution result of the power plant according to a load deviation between the distributed load information and target load information in the scheduling distribution result. By adopting the method, the operation efficiency of multi-scheduling joint control can be improved.

1. A power device for coupling a power supply to one or more power loads, comprising: a plurality of dynamically dispatchable electrical energy storage components providing at least one of dynamically dispatchable energy storage and energy recovery; and a controller for dynamically controlling operation of one or more of the dynamically dispatchable electric energy storage components to dynamically balance the power supply device and the one or more power loads by dynamically storing energy in the dynamically dispatchable electric energy storage components when available electric power exceeds the electric power required by the one or more power loads, and / or dynamically supplying energy from the one or more dynamically dispatchable electric energy storage components when the available electric power is equal to or less than the electric power required by the one or more power loads.

Methods for switching the power source supplying an alternating current (AC) electrical load from a first AC power supply to a second AC power supply comprising: (a) determining, during a time period, the zero voltage crossings of at the first and second AC power supplies; (b) estimating for a future time period, based on information obtained in said determining step (a), the times at which a series of future current zero-crossings of said AC load and at least the current zero-crossing of the second power supply; (c) based on said estimating step (b), determining whether during said future time period the time of said zero-crossing of said load current and the zero-crossing of the second power supply are within about 0.1 microseconds of each other; and (d) for a time period during which said zero crossings are estimated to be within 0.1 microseconds of each other, switching said load to said second power supply at said time at which said zero crossings are estimated to be within 0.1 microseconds of each other, wherein said switching: (i) uses a solid-state switching system and microprocessor-based control system for actuating said solid-state switching circuit; and (ii) accounts for any known actuation delay between the actuation signal from said microprocessor and the occurrence of said switching.

A power control system includes: a first energy storage system; a bidirectional AC / DC converter connected between an AC power system and the first energy storage system; and a control device for controlling an operation of the bidirectional AC / DC converter. The control device controls the operation of the bidirectional AC / DC converter to control charging and discharging of the first energy storage system. The power control system includes: a circuit breaker connected between the AC power system and the bidirectional AC / DC converter; a resistor connected between the circuit breaker and the bidirectional AC / DC converter; and a switch for forming a discharge path for discharging the DC power of the first energy storage system via the resistor, while the circuit breaker is open.

The invention provides a power supply assembly and a power distribution area flexible interconnection device and system, and the power supply assembly comprises an AC / DC switching power supply which is characterized in that a first AC input end obtains first AC power, and a first DC output end converts the first AC power to obtain first DC power and outputs the first DC power; the DC / DC power supply comprises a second direct current input end which obtains second direct current, and a second direct current output end which converts the second direct current to obtain third direct current and outputs the third direct current; the standby power supply UPS is connected with the first direct current output end and comprises a third direct current output end, if the first direct current voltage is smaller than a preset threshold value, first direct current output is cut off, and fourth direct current of the standby power supply UPS is output, otherwise, the first direct current is output; the power supply redundancy module comprises a fourth direct current input end for acquiring the first direct current or the fourth direct current and the third direct current, and a fourth direct current output end for outputting the larger voltage in the first direct current or the fourth direct current and the third direct current; therefore, safe redundant power supply is realized.

The invention provides a load transfer method and device in a fault scene of a main power distribution network. The method comprises the following steps: S1, determining a power distribution network no-supply node corresponding to a main network fault bus and a power distribution network transfer path set of the no-supply node according to a main power distribution network topology model; s2, determining an optimal transfer path in the transfer path set of the power distribution network by using a multi-target particle swarm optimization algorithm, and carrying out load transfer; s3, if the voltage and the power of the loss-of-supply node are not recovered to be normal, updating the power distribution network topology model based on the optimal transfer path, performing power flow simulation according to the updated power distribution network topology model, and determining whether power grid operation out-of-limit exists or not; and S4, when power grid operation out-of-limit exists, determining a control strategy based on the out-of-limit scale. The load transfer method and device in the fault scene of the main power distribution network have the capabilities of global perception, intelligent path selection and out-of-limit linkage disposal, and the robustness of load transfer scheduling of the power distribution system and the timeliness of out-of-limit response are effectively improved.

A storage and charging integrated apparatus includes an energy storage module and a charging module. A first input terminal of the charging module is connected to a first output terminal of an AC-DC conversion module, a first terminal of the energy storage module is connected to a second output terminal of the AC-DC conversion module, a second terminal of the energy storage module is connected to a second input terminal of the charging module, and an input terminal of the AC-DC conversion module is connected to an AC power grid. The charging module is configured to perform charging output based on a first charging power and a second charging power connected in series, and provide a third charging power output by the charging module for a to-be-charged device; where the first charging power is provided based on a working state of the AC-DC conversion module.

A method, apparatus, device and storage medium for generating electric power dispatching task are provided, where the method includes: obtaining current operating data of a target power grid, where the operating data includes an operating parameter of each electric power device in the target power grid; extracting a global operating feature representing global operating information of the target power grid from the operating data; extracting, for each electric power device from the operating data, a local feature of a neighborhood with the electric power device as a topological center; fusing the global operating feature and the local feature of each electric power device to obtain a fused feature; and generating an electric power dispatching task based on the fused feature, where the electric power dispatching task includes a dispatching operation of each electric power device.

A static transfer switch includes first and second inputs, an output, first and second bypass breakers, first and second power stages, first and second contactors, a load switch, and a controller. The first and second inputs are configured to selectively couple with a first power source via a first circuit breaker and a second power source via a second circuit breaker, respectively. The first and second bypass breakers are configured to selectively couple the first and second input with the output, respectively. The first and second contactors are configured to selectively couple the first input with the first power stage and the second input with the second power stage, respectively. The load switch is configured to selectively couple the first and second power stages with the output, and the controller is configured to modify an operating state of the first and second contactors and the first and second power stages.

The invention relates to the technical field of emergency power supplies, in particular to distributed photovoltaic micro-grid emergency power supply equipment which comprises a photovoltaic power generation unit, a wind power generation unit and a fuel cell power generation unit. The electric energy management module is electrically connected with the energy production module and the energy storage module, the core of the electric energy management module is a microcontroller, and the electric energy management module judges and executes an operation emergency mode according to the internal state data of the system; and the emergency power supply interface module is connected with the electric energy management module and comprises a traditional wired power supply interface and a wireless electric energy transmission unit. According to the invention, the risk of laying cables in a dangerous environment is thoroughly avoided through the wireless electric energy transmission interface, and rescue workers only need to place equipment in a power supply area for charging, so that the deployment speed and the operation safety are greatly improved; by integrating photovoltaic cells, wind cells and fuel cells, other energy sources can be supplemented in time when one energy source fails, and the continuous power supply capacity under severe conditions is remarkably enhanced.

The application discloses a kind of integrated protection self-healing function's power distribution network energy balance regulation and control method, comprising the following steps: S1, power distribution network system normal operation, energy manager acquires the data information of power distribution network system;S2, whether there is change in power distribution network system node load, if yes, enter step S3;If no, power distribution network system if fault enters step S4;If no fault, enter step S1;S3, whether there is fault in power distribution network system, if yes, enter step S4;If no, execute energy manager individual regulation strategy;S4, whether energy manager in power distribution network system adjusts switch position, if yes, adjust distributed power output, enter step S5;If no, carry out distributed protection self-healing system regulation;S5, power distribution network system restores balance.It is realized that energy balance regulation and control under normal operation condition of power distribution network system containing distributed power supply configuration and double-end power supply and self-healing system regulation and control under fault condition and energy regulation after fault self-healing.