248 results about "Electrical grid" patented technology

The invention relates to the technical field of cable fault diagnosis and positioning, in particular to a cable fault positioning method and system based on multi-source data space-time correlation, and the method comprises the steps: obtaining partial discharge, traveling wave and temperature multi-source monitoring data from a high-voltage cable-overhead line hybrid power transmission network; on the basis of space-time correlation analysis of partial discharge and temperature data, heat-electricity associated defect points are calibrated; comparing traveling waves of the cable and the overhead line, and identifying and inhibiting cross-domain propagation interference; positioning the traveling wave data which are not identified to obtain temporary coordinates, judging fault characteristics by fusing information such as sheath ring current and the like, and comparing the temporary coordinates with defect points to generate matching identification; and inputting multi-dimensional information such as fault features, defect matching identification and temperature into the fusion model, calculating the confidence coefficient of a fault mode, and outputting a cross validation positioning result. According to the invention, high-reliability positioning of mixed line faults and active early warning of insulation defects are realized by carrying out space-time correlation and fusion decision on multi-source monitoring quantities such as traveling waves, partial discharge, circulation, temperature and the like.

A system and method of power management for a power generation system is disclosed. A method of power management for a hydrogen generation system including one or more electrochemical stacks, the one or more electrochemical stacks receiving power from an electrical grid including at least one power source, includes: receiving a frequency or voltage reference value for the hydrogen generation system; continually monitoring a frequency or voltage of the electrical grid; and varying a load of the hydrogen generation system in response to the frequency or voltage of the electrical grid differing from the frequency or voltage reference value to restore the frequency or voltage of the electrical grid to the frequency or voltage reference value.

Information about power events on the electrical grid may be determined by processing reports of power anomalies from power monitors installed at various points on the electrical grid, such as in buildings of end users of electrical power. A power monitor may process sensor measurements of the power line to determine that a power anomaly has occurred. The power monitor may transmit information about the power anomaly, such as the time and location, to a processing location. The processing location may select power anomaly reports having a similar time and location to determine information about a power event that caused the power anomalies. The information about the power event may include the type, time, and location of the power event. A notification may be sent about the power event to facilitate repairs and reduce risks, such as the risk of electrical fires.

A medical imaging system includes an X-ray source configured to emit X-rays. The medical imaging system also includes a high voltage generator configured to provide power to the X-ray source. The medical imaging system further includes a high efficiency power distribution unit configured to receive electrical power from an electrical grid and to store the electrical power, wherein the high efficiency power distribution unit includes an active rectifier configured to regulate a high voltage direct current outputted to components of the medical imaging system including the high voltage generator.

The present disclosure relates to a method for protecting an electrical power collection system comprising an electrical grid being electrically coupled to an electrical branch, the electrical branch comprising a plurality of switches for connecting or disconnecting the electrical branch at respective positions on the electrical branch, wherein a distributed energy resource is electrically coupled to a node on the electrical branch. The method includes detecting a fault occurrence on the electrical branch based on a monitored voltage and / or current of the electrical branch; limiting, based on the detecting a fault occurrence, a power flow from the electrical branch to the electrical grid; adjusting, based on the detecting a fault occurrence, a voltage and / or current on the electrical branch; determining a fault location based on the adjusted voltage and / or current on the electrical branch; and disconnecting a portion of the electrical collection system based on the determined fault location.

Systems connected to an electrical grid for delivering electrical power thereto and methods of controlling such systems are provided. The electrical system includes a plurality of power generators. A system-level controller receives a demand signal from the electrical grid. The system-level controller generates first and second power production commands for respective first and second power generators. The first power production command is based on an excluded zone of operation for the first power generator. The first and second power production commands are transmitted to the plurality of power generators so as to control a power output of the first power generator according to the first power production command and to control a power output of the second power generator according to the second power production command. The power output of the first power generator is outside of the excluded zone of operation for the first power generator.

A method for detecting discrepancies in an electrical grid configuration includes receiving network-communicated telemetry data from a plurality of grid monitoring devices of an electrical grid over a computer network. The apparent grid configuration is estimated based at least in part on the network-communicated telemetry data, and compared to a digital documented configuration of the electrical grid stored in computer storage. Based on the comparison, an indication of a potential discrepancy between the apparent grid configuration and the digital documented grid configuration is output.

A power supply that extracts power from the electromagnetic field surrounding an electrical cable of an electrical grid over a wide current range through the electrical cable. The power supply includes multiple power supply modules connected in parallel across the same input ferromagnetic core and across the same output capacitor. The power supply modules have different numbers of windings across the ferromagnetic core, and when the output voltage exceeds an allowable value for a particular power supply module, a short circuit is applied across the winding of each power supply module.

A power generation system for supplying power to at least one electrical grid of an aircraft, the power generation system comprising a control device configured to receive a universal operational setpoint and to output a first parameterized setpoint (PCONS1) of a first converter (C1) and a second parameterized setpoint (PCONS2) of a second converter (C2), each parameterized setpoint (PCONS1, PCONS2) being a power supply for switching between the converters (C1, C2) and the first converter (C1) and the second converter (C2). The control device is controlled by a voltage regulation setpoint (RegU) of the distribution voltage or an auxiliary regulation setpoint (RegA) for the turbine, the control device being configured to output a parameterized setpoint with a stable delay with respect to the parameterized setpoint of the voltage conversion (TransU) for the auxiliary conversion (TransA) such that the voltage regulation (RegU) is extended during the auxiliary conversion (TransA).

A power supply system and method for operating an electrical grid having coupled thereto at least one fluctuating source of AC power generated from renewable energy, consumers creating a fluctuating AC power demand, at least one grid forming controllable inverter coupled to an electric battery, and the power supply system including a controller. The controller being configured to perform a method of:operating the at least one fluctuating source of AC power as a slave to the grid, measuring grid frequency,controlling grid frequency with the controllable inverter as master controller to obtain a desired grid frequency,supplying power from the electric battery through the controllable inverter to the grid when the measured gridfrequency is below the desired grid frequency by more than a first lower margin, and withdrawing power through the controllable inverter from the grid to the electric battery when the measured grid frequency is above the desired grid frequency by more than a second first upper margin.

The invention provides an importance degree evaluation method and device of a power transmission line, electronic equipment and a storage medium, and can be applied to the technical field of electric power. The method comprises the following steps: acquiring perfection evaluation data corresponding to each evaluation index for evaluating the importance of the power transmission line; wherein the perfection degree evaluation data comprises at least one expert based on index data of the evaluation index and a perfection degree score for evaluating the perfection degree of the evaluation index; for each evaluation index, based on the perfection evaluation data and the index type of the evaluation index, obtaining the index importance of the evaluation index; and obtaining the comprehensive importance of the power transmission line based on the index importance of each evaluation index. According to the method provided by the invention, various evaluation indexes for evaluating the importance of the power transmission network are classified and evaluated, so that a differentiated evaluation system which better conforms to the operation characteristics of the power distribution network is constructed, and the accuracy of power transmission line importance evaluation is effectively improved.

A method of operating a heating system of a wind turbine connected to an electrical grid. The method includes receiving, via a heating circuit of the heating system, a voltage signal from the electrical grid. The method also includes processing the voltage signal using the heating circuit of the heating system. Processing the voltage signal using the heating circuit of the heating system includes superimposing a pulse width modulation (PWM) signal onto the voltage signal. Further, the method includes providing continuous temperature control to at least one heating element of the heating system via the PWM signal from the heating circuit. In addition, the method includes maintaining a temperature of the at least one heating element within a temperature range using the PWM signal during operation of the wind turbine to minimize temperature cycling of the at least one heating element.

The present utility model relates to a connector for photovoltaic windows which is designed to transmit the electrical energy generated by a photovoltaic glass sheet installed in a window pane to the frame, thereby allowing it to be integrated into the electrical grid of the building. The connector consists of flexible conductors embedded in the window joint, which is an electrical contact system between the pane and the frame, having an insulating sleeve. The main advantages include its ease of installation, durability, energy efficiency and aesthetic design, ensuring discrete integration without affecting the functionality of the window. The invention can be used for residential, commercial and industrial buildings seeking to efficiently harness solar energy.

NUCLEAR STEAM SUPPLY SYSTEM AND METHOD This disclosure relates to a nuclear steam supply system, comprising: a nuclear power plant, a heat source circuit, a working fluid circuit, a steam consumer, and a steam heat accumulator, where the nuclear power plant is connected to the heat source circuit, the working fluid circuit is connected to the steam consumer and the steam heat accumulator, the steam heat accumulator is connected to the steam consumer, and the heat source circuit and the working fluid circuit are independent of each other. This disclosure allows for peak levelling load adjustment of the nuclear power plant and steam load adjustment of the steam consumer, while ensuring the operational safety of an electrical grid and a reactor. Summary figure: Fig. 1

An electrical grid system includes: a first obtaining controller that obtains the electric power demand or supply request information from the electric power transmission and distribution facility; a second obtaining controller that obtains an electric storage state information; a third obtaining controller that obtains a vehicle information of an electric vehicle; a supply and demand satisfaction level calculation controller that calculates a supply and demand satisfaction level based on the electric power demand or supply request information; a selection controller that selects an electric vehicle to be guided to the charge or discharge spot based on the vehicle information obtained by the third obtaining controller and the supply and demand satisfaction level calculated by the supply and demand satisfaction level calculation controller; and a communication controller that sends a guide information to the selected electric vehicle.

Method for controlling a wind power plant for generating and delivering electrical energy to an electrical grid (2), the wind power plant (1) comprising a wind turbine (3) configured to be selectively connected to the electrical grid (2), the method comprising controlling the wind turbine (3) among a plurality of operational modes on the basis of different weather conditions.

A system for producing clean hydrogen and clean hydrogen derived products using water electrolysis and time correlated renewable power whereby the operation of the electrolysis is optimized for using time correlated renewable power amongst other factors. The system includes a hydrogen production unit that uses an electrolyzer to produce hydrogen from water and electricity, where the electricity is delivered via a connection to the electrical grid and / or behind the meter renewables and whereby a control unit manages the production of hydrogen based on the attributes of the renewable power, including time correlation and other factors. The hydrogen produced from time correlated renewables may be used directly to decarbonize industrial, transportation, or other applications or the hydrogen may be used to produce hydrogen derived products such as ammonia, methanol, transportation fuels (such as sustainable aviation fuel (SAF), diesel, gasoline), LPG, chemicals, or other low carbon products that use hydrogen as an input for the production process.

The present disclosure proposes an apparatus (110) for powering an electrical grid (120) of an aviation propulsion system (100), the apparatus (110) comprising: a generator (112), preferably a permanent magnet synchronous machine, comprising a rotor and a stator, the rotor being configured to be driven by a turbine engine (111), the stator being configured to generate a first AC voltage (V1); an AC / DC converter (114) configured to rectify a first voltage (V1) transmitted by the generator (112) to obtain a second voltage (V2); and a DC / DC converter (116) configured to chop a second voltage (V2) delivered by the AC / DC converter (114) to obtain a third voltage (V3), with reference to a current flow from the AC / DC converter (114) to the DC / DC converter (116), the DC / DC converter (116) being located downstream of the AC / DC converter (114).

In one example, a circuit interrupter includes a bus bar configured to conduct a current and configured to connect to an electrical grid. The circuit interrupter includes a bus bar cutter configured to sever the bus bar, a temperature compensation circuit including a resistance-temperature-coefficient (RTC) circuit configured to provide a temperature-compensated delay, and a detonator firing circuit configured to trigger the bus bar cutter in response to the temperature-compensated delay. The temperature-compensated delay is based on a voltage across a resistance temperature detector (RTD).

The invention is in the field of an integrated energy buffer system for urban storage, such as in a building, in particular in a parking lot thereof, for mitigating electrical grid con- gestion of transport of electrical power in particular in urban areas, and for balancing demand and supply of electrical energy.

The disclosure concerns a method, system, and business model for integrating an electric vehicle into a power grid as a distributed energy resource, specifically through a demand response program. The method comprises several steps. In the first step, an electric mobility service provider (EMSP) is deployed to enable data exchange between the electric vehicle and a charging station connectable to the electric vehicle. Furthermore, the EMSP receives a charging and discharging plan defined by the electric vehicle, as well as data on the electric vehicle's state of charge (SOC). The EMSP retrieves energy supply and grid demand data from a balancing entity (BRP). Based on the electric vehicle's needs, the grid demand data, and / or the energy supply data, the EMSP creates an optimized charging and discharging plan for the electric vehicle.The EMSP unit transmits the optimized charging and discharging plan to the BRP unit for aggregation. The BRP unit provides the EMSP unit with constraints based on data about the grid capacity and / or energy supply and demand conditions. The EMSP unit then adapts the electric vehicle's charging and discharging plan to these constraints and distributes the adapted plan to the charging station, controlling the energy flow between the electric vehicle and the grid.

The application belongs to the technical field of power grid contactor equipment, and discloses a high-safety power grid contactor device, which comprises a base, a first driving assembly and a second driving assembly, the base is provided with a mounting plate, the mounting plate is provided with a mounting hole, in actual operation, the base can be mounted on external transformer equipment and other equipment by means of fasteners such as bolts penetrating through the mounting hole, and the mounting is simple and convenient. Two groups of contactor assemblies are movably arranged on the base, the contactor assembly comprises a connecting member and a rotating member, the connecting member is connected with a wire, the rotating member is rotatably arranged on the base, the first driving assembly drives the two groups of rotating members to rotate, and the second driving assembly drives the two groups of contactor assemblies to relatively move close to or away from each other. The high-safety power grid contactor device can effectively avoid the misoperation of the contactor starting switch, the incorrect combination of the contactor device caused by the misoperation, and the electrification, so as to guarantee the operation safety of the operator in the circuit maintenance process.

Embodiments of the present disclosure relate to a current detection device for an electrical grid. A detection device for a DC electrical grid comprises: - a first detection module configured to detect a line current flowing along an electrical line and to provide a first detection signal indicative of the line current; - a second detection module configured to detect the line current along the electrical line and to provide a second detection signal indicative of a rate of change of the magnitude of the line current over time; - a plurality of signal processing modules for processing the first detection signal and the second detection signal and for providing a detection signal indicative of a behavior of the line current.

To provide electric transmission and distribution networks.SOLUTION: A system for detecting faults in an electric grid is provided, comprising: a plurality of grid measuring devices distributed in the electric grid and configured to be operative to measure current and / or voltage with their respective time of occurrence, enabling a user to define at least one fault type; and at least one rule for detecting the fault type, where the rule associates the fault type with at least one of the measurements, executes measurement, and analyzes the measurements according to the rule to detect a fault.SELECTED DRAWING: None

A method and controller are provided for operating an isolated or weakly connected electrical grid supplied by at least one fluctuating renewable energy source, such as wind or photovoltaic generation, in combination with a grid-forming controllable inverter coupled to a battery. The inverter operates as a master controller to regulate grid frequency and voltage, while the renewable sources operate as slaves. Battery charging and discharging are controlled according to deviations in grid frequency and charge level, with slopes defined for smooth power transitions. Additional selectively driven or non-driven alternators may be coupled in parallel with the inverter to stabilize frequency, provide inertia, reactive power, and short-circuit capacity, or support load changes. Control logic further manages integration of combustion engine-driven generators, resistive load banks, and external energy banks, while accounting for battery temperature and charge thresholds, thereby ensuring stable grid operation under fluctuating generation and demand conditions.

To provide a power control unit 1 for a ship's propulsion system 100, comprising an internal combustion engine 4 and a shaft 2 having a shaft generator 5. [Solution] The power control unit 1 is configured to provide fuel commands to the internal combustion engine 4 based on the low-speed component of the shaft 2 speed error, i.e., the low-speed component of the deviation of the shaft speed from the speed setpoint. A generator power command is provided to the shaft generator 5 based on the high-speed component of the shaft 2 speed error and the state of the electrical grid of the electrical grid electrically connected to the shaft generator 5. An energy buffer 7 is used to store power from the shaft generator 5, release power to the shaft generator 5, and release power to the electrical grid 8. Thus, it becomes easier to achieve a more stable engine control system and avoid engine overload.

The application discloses an insulator state monitoring device for power transmission lines of power grids, and relates to the technical field of insulator monitoring.The device comprises a fixing assembly and a monitoring ring.The fixing assembly is erected on an iron frame workpiece, and the iron frame workpiece is connected with a plurality of insulators on one side.The monitoring ring is provided with two semicircular rings, and a visual monitoring module one is arranged on the surface of the side of the monitoring ring facing the insulators.The inner diameter surface of the semicircular ring is respectively provided with a visual monitoring module two and an infrared monitoring module.Air chambers one and two are sequentially arranged inside the semicircular ring from inside to outside.The air chamber one is provided with a plurality of through holes on the side facing the insulators at intervals, and a fixing rod is arranged in the through hole.The fixing rod is provided with a rotating plate, and a torsional spring is connected between the fixing rod and the rotating plate.The application improves the comprehensiveness of insulator state monitoring, and improves the surface cleaning quality and convenience of the insulator.

The present invention relates a method for controlling a power generating unit connected to an electrical grid, during a fault ride through event, wherein the fault ride through event causes a phase jump in the electrical grid, the method comprises the steps of: measuring a voltage signal of the power generation unit, calculating a phase angle, based on the measured voltage, in a phase look loop (PLL) block, comparing the phase angle with previous measured phase angle, and calculate a phase angle change, detecting if the phase angle change larger than a threshold and changing to an another state by a Fault Ride Through State machine (FRTSM) for which the power generation unit shall operate, after the threshold has been exceeded.

The invention relates to an isolated DC-DC electrical converter (2) configured to convert a first DC current at a first voltage received at an input terminal (4) into a second DC current at a second voltage at an output terminal (6), the electrical converter (2) comprising a first circuit (10) connected to the input terminal (4) and a second circuit (12) connected to the output terminal (6), the electrical converter (2) further comprises a magnetic coupler (14) coupling the first circuit (10) to the second circuit (12), the electrical converter (2) comprising a controller (8) configured to control the controlled switch (2) according to at least one control rule defining a change in the switching frequency of the electrical converter (2) as a function of at least one voltage value, referred to as an adjustment value, the adjustment value depends at least on the first voltage and / or the second voltage.