799results about "Selective ac load connection arrangements" patented technology

The invention discloses an optical storage and charging integrated micro-grid energy management system, which relates to the related technical field of micro-grids and comprises an electric energy collection layer, a digital twinborn layer, a collaborative optimization layer, an application execution layer, a photovoltaic power generation unit, an energy storage unit, a charging load unit and a distributed measurement and control terminal. The invention further discloses an energy management method of the photovoltaic, storage and charging integrated micro-grid. The energy management method comprises the steps of data acquisition, digital twin modeling, multi-target strategy generation and optimization, strategy evaluation and screening, strategy issuing and execution and closed-loop feedback and dynamic correction. According to the invention, through short-term prediction of a digital twinborn layer and real-time generation of a charging and discharging strategy by a collaborative optimization layer, fluctuating renewable energy sources are preferentially consumed, the light abandoning rate is reduced, energy storage charging is automatically triggered in an illumination peak period, and power overflow is avoided; based on the simulation result of the digital twinborn model, the power distribution of energy storage and load is dynamically adjusted, so that the photovoltaic utilization rate is improved, and the dependence on a traditional power grid is reduced.

The invention discloses a virtual power plant-based power distribution area collaborative governance system and method, and relates to the technical field of power system automation and intelligent power distribution networks, and the system comprises a dynamic autonomous partition governance unit which is used for dividing a power distribution area node into a plurality of subunits, correcting abnormal states in the subunits based on a power mutual aid strategy between adjacent subunits; the multi-time-scale collaborative optimization unit is used for constructing a second-level, minute-level and hour-level multi-time-scale collaborative mechanism and coordinating control targets of the power distribution area at different time scales; the edge-cloud collaborative decision-making unit is used for complementing the edge side real-time control strategy and the cloud global strategy; and the elastic resource pool unit is used for calculating the elastic contribution degree of the resources and formulating priorities, and calling the resources according to the priorities to meet load requirements. By integrating the virtual power plant technology, the edge calculation, the digital twinning and the multi-time scale optimization strategy, the intelligent and efficient treatment of the power distribution area is realized.

The invention relates to the technical field of hydrogen production, in particular to a micro-grid hydrogen production system based on dynamic optimization control and a multi-mode energy scheduling method. Comprising a renewable energy power generation unit which comprises at least two distributed power supplies with different power generation characteristics; the multi-stage hydrogen production device is configured to receive the electric energy output of the renewable energy power generation unit and perform proton exchange membrane water electrolysis hydrogen production; the hybrid energy storage system comprises a super capacitor bank and a lithium ion battery pack which are connected in parallel to the direct current bus through a bidirectional DC / DC converter; the dynamic optimization controller is internally provided with a multi-time-scale coordination algorithm and is used for acquiring meteorological prediction data, load demand data and an energy storage SOC state in real time; the multi-mode scheduling module comprises three working modes including an island operation mode, a grid-connected operation mode and an emergency standby mode; according to the scheme, hydrogen production economy, equipment durability and power supply reliability can be considered at the same time.

Systems and methods for managing the distribution of electrical power are disclosed. The system can maintain a status of each account of a plurality of accounts. Each account can correspond to an electrical power generation device, an electrical power consumption device, and an electrical power transmission device. The system can generate a first record object in response to the generation of a unit of power. The system can identify a first path identifying a source device and a destination device to transmit the unit of power. The system can generate a control signal to route the unit of power from the source device to the destination device. The system can update an event tracker to indicate the routing of the unit of power. The system can generate a second record object corresponding to the destination device. The system can update a second account to include the second record object.

The invention relates to a power equipment state self-healing operation and maintenance method, and belongs to the field of power equipment operation and maintenance, and the method comprises the steps: obtaining the real-time operation state data of a power supply in a current multi-source power supply system, collecting the data through a preset sampling frequency, and constructing a power supply state matrix; a conversion time constraint condition is set in advance, a zero-delay switching decision tree is constructed and a power supply switching decision is output in combination with a main power supply fault risk assessment result, and if the main power supply fault risk assessment result is abnormal, the standby power supplies are switched according to the determined switching priorities of the standby power supplies and the power supply switching decision; after the switching is completed, monitoring the power supply continuity index of the power equipment in real time, and if the power supply fluctuation time or the phase jump amplitude exceeds a preset allowable value, smoothing the power supply fluctuation by adopting the rapid power compensation function of the energy storage device; the stability and reliability of the multi-source power supply system are improved, and intelligent power supply switching and self-healing disaster recovery are realized.

The invention relates to the technical field of intelligent distribution, in particular to a power grid load distribution system and method based on intelligent control, and the system comprises a data collection and processing module which carries out the real-time collection and data processing of all node data and meteorological data of a power grid, and obtains the actual power grid load data; the communication network module is used for transmitting the actual power grid load data; the intelligent regulation and control module is used for constructing a rural power grid load model to obtain a load prediction value; the monitoring alarm module is used for monitoring the actual rural electricity consumption condition in real time according to the load prediction value; the system verification module is used for verifying the stability of the power grid after regulation and control configuration, verifying the resource utilization efficiency of the power grid according to the load rate of the transformer, and adjusting the regulation and control configuration; and the execution feedback module is used for performing control strategy command execution on the power grid equipment. The power supply and demand balance of the rural power grid is realized, and the utilization efficiency of power grid resources is improved.

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.

A method operable by a controller of a static transfer switch (STS) is provided. The STS includes first and second inputs selectively coupled with first and second power sources via first and second circuit breakers, respectively, an output coupled with a load, first and second bypass breakers selectively coupling the first and second inputs, respectively, with the output, at least one removable power stage module including first and second power stages configured to conduct electrical power when active, first and second contactors selectively coupling the first and second inputs with the first and second power stages, respectively, and a load switch selectively coupling the first and second power stages with the output. The method includes modifying an operating state of the first and second contactors and the first and second power stages to implement a bypass operation and an un-bypass operation of the STS in response to a trigger condition.

The present teachings relate to an electrical device (100) comprising: a first electrical power input (101) connectable to receive electrical power from a first power source; a second electrical power input (102) connectable to receive electrical power from a second power source different from the first power source; at least one electrical power output (121, 122, 123) , each electrical power output being connectable to supply electrical power to an individual electrical power consumer; a switching circuit (105) operable to route electrical power from the first electrical input to at least one of the electrical power outputs; a sense circuit operable to detect a depletion signal indicating an interruption in the electrical power which is being provided at the first electrical input; a controller (110) operable to control the switching circuit to switch from the first electrical power input to the second electrical power input in response to the depletion signal, thereby routing electrical power from the second electrical input to at least one of the electrical power outputs. Related methods are also disclosed.

The invention provides an optical storage multi-mode control method. The optical storage multi-mode control method comprises the following steps of 1, collecting multi-source data of photovoltaic output, energy storage SOC, load requirements and electricity price signals in real time; 2, dividing operation modes based on fuzzy logic, such as an economic mode, an emergency power supply mode and a peak value adjustment mode; 3, generating an optimal power distribution strategy in each mode through model predictive control (MPC); and step 4, designing a mode switching logic based on Lyapunov stability to realize non-impact transition, and relates to the technical field of photovoltaic power generation and energy storage system cooperative control, and through multi-source data fusion, fuzzy logic mode division, model prediction control and the Lyapunov stability switching logic, the mode switching logic based on the Lyapunov stability is realized. Self-adaptive efficient operation of the optical storage system under complex working conditions is achieved, the problems that a traditional control method is single in mode, lagged in response and low in energy utilization rate are solved, and the method is suitable for improving the economical efficiency and stability of the optical storage system.

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 device (100), such as an automatic transfer switch or an electrical power distributor, comprises: a first electrical power input (101); a second electrical power input (102); an electrical power output (121, 122, 123); a switching circuit (105) operable to route electrical power from the electrical power inputs to the electrical power output; the switching circuit comprising: a first switching element (111) to allow, when enabled, power flow from the first electrical power input to the electrical power output; and a second switching element (112) to allow, when enabled, power flow from the second electrical power input to the electrical power output; a controller (110) 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.

An electrical power apparatus for coupling between an electrical power supply and one or more electrical power loads includes: a plurality of dynamically dispatchable electrical energy storage components providing at least one of dynamically dispatchable energy storage thereto and energy retrieval therefrom; and a controller to dynamically control the operation of the one or more dynamically dispatchable energy storage components in order to dynamically match the electrical power supply to the one or more loads by dynamically storing energy in one or more of the dynamically dispatchable electrical energy storage components when the available electric power exceeds that required by the one or more loads, and / or dynamically supplying electrical energy from one or more of the dynamically dispatchable electrical energy storage components when the available electric power is less than that required by the one or more loads.

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.

A system and related method balance phase power in a power distribution system. The method comprises performing the following operations dynamically and repeatedly, during operation of subcomponents receiving power from a plurality of redundant intelligent PDUs. Input phases of the intelligent PDUs are monitored for power values associated with the input phases that provide power to the subcomponents through the PDUs. A target per-phase power value is determined. When the input phases are not balanced, an input phase at an input port is redirected to an output port of at least one of the PDUs using a switch to bring the not-balanced phases closer to being balanced phases by reducing a difference of phase powers to the target per-phase power value. The method then comprises performing load shifting on the power supply units (PSUs) associated with the redundant PDUs to improve an overall phase power balance across all redundant PDUs.

The invention provides a power distribution network transfer path preferential analysis method based on an ELCTRE multi-attribute decision-making method, and the method comprises the steps: obtaining a power grid operation mode, taking a power grid frame in the power grid operation mode as a model, taking an operation state as measurement, and selecting a group of anticipated faults as a transfer path analysis object; superposing the initial operation mode and the anticipated fault to define a ground state mode, and carrying out transfer path analysis on the ground state mode to obtain a plurality of transfer schemes; carrying out load flow calculation, short-circuit calculation and risk assessment on each transfer scheme, and calculating residual capacity, voltage condition, short-circuit current condition and risk accumulated value of each level related to the path; calculating the operation cost according to the switching action times of the transfer scheme, and constructing a standardized decision matrix after performing normalization processing on each index according to the weight; carrying out harmony and non-harmony analysis on the standardized decision matrix, and determining the priority and sorting of each scheme; and determining a transfer scheme according to the priority and the sequence.

The invention provides a power supply device, a power supply control device and a control method thereof, the power supply control device is electrically connected to a power supply, and the power supply is used for supplying power to a post-stage circuit of the power supply control device. The power supply control device comprises a current limiting module and a control unit. The current-limiting module is electrically connected to the power supply and the post-stage circuit and comprises a first current-limiting unit and a second current-limiting unit which are connected in parallel, the first current-limiting unit is configured to limit a surge current generated when the post-stage circuit is started, and the second current-limiting unit is configured to limit a surge current generated when the power supply is abnormal. The control unit is electrically connected to the current limiting module and is configured to control the first current limiting unit and the second current limiting unit.

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.

A static transfer switch (STS) system for transferring power between power sources is provided. The STS system includes first and second alternate-current (AC) switch assemblies. The first AC switch assembly includes a first current interrupter, and a first controller configured to control the first current interrupter. The second AC switch assembly includes a second current interrupter, and a second controller configured to control the second current interrupter. The first AC switch assembly and the second AC switch assembly are in communication with one another and are each configured to monitor an output power to the load, the first power source, and the second power source and transfer power when disturbance is detected in the output power, the first power source, and / or the second power source.

The invention discloses a flexible resource distributed optimization scheduling method and system considering wind power uncertainty, and the method comprises the steps: constructing a distribution robust opportunity constraint according to a wind power prediction error fuzzy set, and carrying out the convex approximation of the distribution robust opportunity constraint through introducing a conditional value-at-risk, carrying out linearization processing on the distribution robust opportunity constraint after convex approximation; based on the distribution robust opportunity constraint subjected to linear processing, multi-element flexible resource differentiation operation characteristics of an energy storage system, an electric vehicle and an adjustable load are considered, and a flexible resource collaborative scheduling model considering the wind power uncertainty distribution robust opportunity constraint is constructed; adopting a consensus alternating direction multiplier algorithm to reconstruct the flexible resource collaborative scheduling model considering the wind power uncertainty distribution robust opportunity constraint into a distributed optimal scheduling model; and improving a consensus alternating direction multiplier method through a branch and bound method, processing an adjustable load discrete variable, and solving the distributed optimization scheduling model to obtain a flexible resource distributed optimization scheduling strategy.

The invention relates to the technical field of safe operation of a power system, in particular to a power distribution network information physical system fault collaborative recovery method, which comprises the following steps of: acquiring basic operation data of a communication layer and a physical layer, and respectively constructing fault recovery models of the communication layer and the physical layer; the communication layer takes optimal link performance as a target and applies constraints such as link capacity and connectivity, the physical layer takes multiple parameters such as load recovery as an optimization target and applies constraints such as network topology and power flow, and a double-layer optimization model, an upper layer optimization communication recovery strategy and a lower layer optimization physical recovery strategy are constructed for concurrent faults; and solving by using a double-layer optimization objective function to realize power distribution network fault collaborative recovery. According to the method, the interaction between the communication layer and the physical layer is comprehensively considered, so that the fault point can be more accurately positioned, the fault area can be quickly identified, the optimal recovery strategy is formulated, the power supply reliability is improved, and the healthy development of the smart power grid is promoted.

The invention discloses a smart energy unit device with load flexible adjustment and a load adjustment method. The smart energy unit device comprises a main control module and a function module. The main control module comprises a core processing unit, a power supply module, a man-machine interaction module, a hardware encryption module and various communication interfaces; the core processing unit comprises a central processing unit and a memory and is responsible for executing load identification, intelligent adjustment and decision-making functions; the power supply module comprises a main power supply and a back-up power supply and provides power supply for the unit in a normal or power-off condition; the man-machine interaction module provides a display screen and a key interface for a user to configure and adjust; and the hardware encryption module is used for guaranteeing the security of data storage, transmission and interaction. According to the invention, the flexibility and accuracy of load adjustment are enhanced; and an intelligent algorithm and a machine learning mechanism enable the system to dynamically adapt to load fluctuation, and energy supply is optimized.

Disclosed embodiments provide methods, systems, and computer program products for implementing predictive three-phase power distribution unit (PDU) output load switching for input phase balancing. Disclosed embodiments measure PDU output port power values for powering a plurality of loads over time, perform pattern recognition on the PDU output port power values over time to produce recognized power patterns; and create switching rules based on the recognized power patterns to provide input phase load balancing, wherein the switching rules include at least one of (i) predicted output port power values for a periodic time interval, or (ii) predicted output port power values based on the measured PDU output port power values associated with the loads. Disclosed embodiments switch input phase connection to one or more PDU outputs based on the switching rules.

A power source automatic transfer device is provided, including: a first and second power source input end; an auxiliary power supply unit whose electric energy is acquired from a first and second power source; a device output end connected to a load; and a power source switchover unit including a control unit and a power source switchover switch, the power source switchover switch including a first and second power source switchover switch, wherein a first input end of the first and second power source switchover switch are respectively connected to the first power source input end and the second power source input end, a second input end of the first and second power source switchover switch are both connected to an output end of the auxiliary power supply unit, and an output end of the first and second power source switchover switch are connected with the device output end.

The invention discloses a closed-loop transformer based on a single-core symmetric phase-shifting transformer and a control method thereof. The control method comprises the following steps: establishing a target closed-loop transformer, and establishing a first connection strategy and a first access strategy based on the target closed-loop transformer; acquiring a first control target of the target loop closing transformer; and based on the first control target, the target loop closing transformer is controlled in combination with the first connection strategy and the first access strategy. By adopting the structure that the single-core symmetrical phase-shifting transformer bank and the voltage-regulating transformer bank are connected in series, the amplitude-phase decoupling regulation of the voltage phasor difference on the two sides of a loop closing point is realized, the control rule and mode are simpler, the wiring is simple and convenient, the regulation is flexible, and the regulation range is wider and the regulation precision is higher.

The invention discloses a multi-energy industrial park carbon-electricity cooperative scheduling method considering a carbon emission factor. The method comprises the following steps: acquiring an initial power supply curve and an initial power demand curve, and inputting the curves into a power clearing model considering a space-time carbon emission factor to obtain the space-time carbon emission factor; inputting the space-time carbon emission factor into a carbon-electricity joint decision model of the multi-energy industrial park to obtain an adjusted power demand curve and a carbon quota demand curve; and respectively inputting the adjusted power demand curve and the carbon quota demand curve into a power clearing model and a carbon clearing model which consider the space-time carbon emission factor to respectively obtain a power clearing result and a carbon clearing result, wherein the power clearing result and the carbon clearing result jointly serve as a carbon-power cooperative scheduling result. According to the method, by introducing the space-time carbon emission factor calculation model, the energy use plan can be adjusted, the production cost of the industrial park can be effectively reduced, the carbon emission of the load end is reduced, and the social welfare is improved.

The invention provides a three-network cooperative power grid recovery method and system based on a complex network theory, belongs to the technical field of power systems, and effectively solves the problems that a traditional scheme only pays attention to fault propagation in a single network, and a simulation result is greatly different from a real physical condition. And because the structure of the current urban power station is single, the existing power grid recovery strategy mostly considers a pure traditional power generation station, the recovery capability for coping with disasters is poor, the anti-disaster capability is weak, and the recovery strategy is not flexible enough.

The capacity-adjustable power distribution network interconnection system comprises the following steps: when a first power distribution network is a fault side power distribution network, a second power distribution network is a non-fault side power distribution network, and the interconnection capacity of a split-phase flexible interconnection device is smaller than the to-be-transferred power of the first power distribution network, switching the first power distribution network to the second power distribution network; the split-phase flexible interconnection device is used for absorbing the maximum transfer power corresponding to the interconnection capacity from the second power distribution network and transmitting the maximum transfer power to the first power distribution network, and the adjustable resistor group is used for absorbing the adjustable transfer current corresponding to the adjustable resistor group value from the second power distribution network and transmitting the adjustable transfer current to the first power distribution network; the adjustable resistor group is introduced, so that when the interconnection capacity of the split-phase flexible interconnection device is not enough to support and transfer all fault side loads, the fault side loads can be transferred without adding extra power electronic devices; and the problems of economic loss and adverse effects caused by incapability of transferring all fault side loads due to insufficient interconnection capacity are effectively solved by utilizing the adjustable resistor group.

An inverter is disclosed that includes inverter settings that adjust how power is received and provided by the inverter based on an identified source of the power. The inverter includes a port configured to receive power from a source, a memory to store reference source characteristics for a plurality of power sources, and control circuitry configured to analyze the power to determine one or more characteristics associated with the source, compare the determined one or more characteristics with the reference source characteristics to identify the source, and apply an inverter setting based on the identified source.

Embodiments of the present application relate to the technical field of power supplies, and disclosed are a microgrid synchronization control method and a microgrid power supply system. In the embodiments of the present application, a central controller can directly send a phase difference between voltages on two sides of a grid-connected switch to a power converter in a microgrid, and the power converter directly performs phase compensation on a voltage between the power converter and the grid-connected switch instead of performing phase compensation on the voltage between the power converter and the grid-connected switch in a phase closed-loop control mode by the central controller. Compared with the phase closed-loop control mode, a direct phase compensation mode can quickly realize the phase synchronization of the voltages on the two sides of the grid-connected switch. Therefore, the microgrid synchronization control method provided by the embodiments of the present application can improve the speed of synchronization control.