208results about "Power supply lines" patented technology

The invention provides a voltage fluctuation suppression method and device for a subway direct-current power supply system, and the method comprises the steps: obtaining the voltage amplitude change information of the subway direct-current power supply system at different sampling moments, and determining a real-time voltage fluctuation sequence and the operation state characteristics of each power supply node according to the voltage amplitude change information; space-time correlation mapping processing is carried out on the real-time voltage fluctuation sequence and the operation state features, a fluctuation correlation feature set is generated, and the fluctuation correlation feature set comprises voltage fluctuation space-time propagation path features and inter-node coupling influence features; calling a pre-trained fluctuation suppression decision model to perform dynamic suppression strategy generation processing on the fluctuation association feature set to obtain a voltage regulation parameter sequence for each power supply node; according to the voltage regulation parameter sequence and the operation state characteristics of the power supply nodes, generating a node-coordinated fluctuation suppression execution instruction set; and according to the fluctuation suppression execution instruction set, triggering voltage regulation operation of each power supply node to suppress voltage fluctuation.

The invention discloses a distributed cooperative voltage control method for a hybrid flexible traction substation group, and aims at solving the problems of output voltage cooperation, no-load circulating current suppression and multi-substation load distribution during networking operation of a plurality of hybrid flexible traction substations (HFTSS). Rapid synchronization of output voltage phases of the substations is achieved by introducing an average consistency algorithm, and nearby distribution of train loads among the traction substations is achieved by combining self-adaptive virtual impedance. According to the method, the capacity of the hybrid flexible traction substation for coping with the dynamic change of the external power grid voltage phase can be effectively enhanced, the loss of a contact network is reduced, the regenerative braking energy utilization efficiency is improved, and a feasible path is provided for large-scale application of a low-cost hybrid flexible traction power supply system and improvement of a cooperative control technology system.

The method is applied to the fields of train regenerative braking energy utilization, stray current and rail potential treatment and the like in electrified rail transit, especially urban rail transit. The invention provides a direct-current traction power supply system capable of reducing the energy storage capacity of a super capacitor of urban rail transit, which is combined with a super capacitor energy storage device of the urban rail transit and supplies power to a power electronic device for treating stray current and rail potential by utilizing regenerative braking energy of a train. The super-capacitor energy storage device has the following advantages that on one hand, the energy storage capacity of the super-capacitor bank in the super-capacitor energy storage device between train braking and traction can be reduced, and the utilization efficiency of regenerative braking energy stored by the super-capacitor bank is improved; on the other hand, the problems of stray current, rail potential and the like in the system can be solved from the source, and the power supply distance of a traction substation is remarkably increased. Therefore, the direct-current traction power supply system is of great significance to green and safe operation of urban rail transit.

The application provides a voltage fluctuation suppression method and device for a subway direct-current power supply system, comprising: obtaining voltage amplitude change information of the subway direct-current power supply system at different sampling moments, determining a real-time voltage fluctuation sequence and an operating state feature of each power supply node according to the voltage amplitude change information; performing space-time correlation mapping processing on the real-time voltage fluctuation sequence and the operating state feature to generate a fluctuation correlation feature set, wherein the fluctuation correlation feature set comprises a space-time propagation path feature of voltage fluctuation and a coupling influence feature between nodes; calling a pre-trained fluctuation suppression decision model to perform dynamic suppression strategy generation processing on the fluctuation correlation feature set to obtain a voltage regulation parameter sequence for each power supply node; generating a node-coordinated fluctuation suppression execution instruction set according to the voltage regulation parameter sequence and the operating state feature of each power supply node; and triggering voltage regulation operations of each power supply node according to the fluctuation suppression execution instruction set to suppress voltage fluctuation.

The invention discloses a two-phase input coordination control method and system for a hybrid through traction power supply device. The method comprises the following steps: acquiring alternating-current side voltage and current and direct-current side voltage of each group of two-phase input ports in the device in real time; obtaining an active reference instruction of each output port according to the DC side voltage; performing single-phase dq conversion based on a virtual axis according to the alternating current side voltage and current to obtain dq axis current components of each group of two-phase input ports; obtaining active and reactive current reference instructions of each group of two-phase input ports according to the active reference instruction and a first condition; pWM modulation is carried out according to the dq-axis current component and the active and reactive current reference instruction, and PWM instructions of each group of two-phase input ports are obtained; and continuously obtaining a PWM instruction and driving the device according to the PWM instruction.

The invention discloses a locomotive electrical system and a locomotive power supply control method, and the locomotive electrical system is characterized in that the high-voltage input end of a traction transformer is electrically connected with a locomotive contact net through the rising of a pantograph, or is electrically disconnected with the locomotive contact net through the falling of the pantograph; the input end of the four-quadrant rectifier module is connected with the low-voltage output end of the traction transformer; the auxiliary load module, the power battery module and the traction module are respectively connected with the output end of the at least one four-quadrant rectification module; the power battery module is used for storing energy and supplying power to the locomotive; the traction module is used for traction locomotive driving and / or kinetic energy recovery. The invention provides a locomotive electrical system. An auxiliary load module, a power battery module and a traction module are connected to the output end of a four-quadrant rectification module. The auxiliary load module, the power battery module and the traction module operate independently so that a charging strategy can be controlled conveniently, and charging of a power battery of a locomotive electrical system can be achieved when a locomotive operates.

To obtain a power control unit that enables suitable power utilization according to a situation of equipment included in a railway system.SOLUTION: A power control unit 21 comprises: a data acquisition part 22 that acquires status data from at least one managed object among an electrical feeding system including equipment for supplying electric power to an electric train, the electric train, and station equipment; a calculation part 24 that calculates control parameters for controlling electric power in at least one controlled object among the electrical feeding system, the electric train, and the station equipment on the basis of status data of a managed object different from the controlled object; and a transmission processing part 25 that transmits the calculated control parameters to the controlled object.SELECTED DRAWING: Figure 2

Embodiments include techniques for automatically restarting a voltage foldback circuit, the techniques include operating a circuit, and detecting a condition of the circuit. The techniques also include performing a foldback operation based at least in part on the condition of the circuit, subsequently detecting the condition of the circuit. The techniques include initiating a timer of the circuit based at least in part on the subsequent detection of the circuit, and returning the circuit to normal operation based on the timer.

Provided in the present application are a dual-current vehicle power supply conversion system and method, and a vehicle and a storage medium, which are used for power supply conversion of a dual-current vehicle between a suburban railway and an urban rail. The system comprises: a detection unit, a conversion unit, a power supply unit and a central control unit, wherein the detection unit comprises a beacon detection module, a vehicle speed measurement module, a vehicle traveling time detection module and a vehicle power supply mode detection module; and the central control unit comprises an operation module, a first determination module, a second determination module and a storage module, the operation module being used for calculating a vehicle traveling mileage, the first determination module being used for determining whether a vehicle successfully detects each beacon, the second determination module being used for determining whether the vehicle reaches each beacon, and the storage module being used for storing distance information between two adjacent beacons and a beacon level classification mode. In the present application, level classification is performed on beacons in a conversion area, and the vehicle executes corresponding actions at beacons of different levels, thereby improving the reliability of alternating-current / direct-current power supply conversion for dual-current vehicles.

The application discloses a kind of urban rail transit full flexible DC power supply systems, including centralized power supply system and decentralized power supply system, centralized power supply system includes at least two independent main substation, and is supplied to multiple substations by medium voltage network, and main substation is accessed two-way external power supply and is respectively output to I section medium voltage bus, Ⅱ section medium voltage bus by converter device;I section medium voltage bus, Ⅱ section medium voltage bus are connected with the medium voltage bus of substation;Decentralized power supply system is provided with at least two settings in substation opening and closing station, and is supplied to adjacent substation by medium voltage network, and opening and closing station is accessed two-way external power supply and is output to the medium voltage bus of substation by converter device;The medium voltage network of two kinds of power supply systems is connected with double loop network scheme or loop network scheme;Substation is provided with two energy routers for mutual standby, and the input end of energy router is respectively connected I section medium voltage bus or / and Ⅱ section medium voltage bus.

A contactless power feeding facility includes a coupling unit electromagnetically coupling a target feeder line and an adjacent feeder line. A target power supply apparatus includes: a phase detector detecting the induced current phase which is the phase of an induced current flowing through the target feeder line by the electromagnetic induction via the coupling unit while an alternating current is supplied to the adjacent feeder line by an adjacent power supply apparatus; an alternating-current generator generating the alternating current to be supplied to the target feeder line; and a phase controller controlling the alternating-current generator such that the phase of the alternating current to be supplied to the target feeder approaches the induced current phase detected by the phase detector.

The invention provides a voltage fluctuation suppression method for a subway DC power supply system, and the method comprises the steps: obtaining the voltage amplitude change information of the subway DC power supply system at different sampling moments, and determining a real-time voltage fluctuation sequence and the operation state characteristics of each power supply node according to the voltage amplitude change information; space-time correlation mapping processing is carried out on the real-time voltage fluctuation sequence and the operation state features, a fluctuation correlation feature set is generated, and the fluctuation correlation feature set comprises voltage fluctuation space-time propagation path features and inter-node coupling influence features; calling a pre-trained fluctuation suppression decision model to perform dynamic suppression strategy generation processing on the fluctuation association feature set to obtain a voltage regulation parameter sequence for each power supply node; according to the voltage regulation parameter sequence and the operation state characteristics of the power supply nodes, generating a node-coordinated fluctuation suppression execution instruction set; and according to the fluctuation suppression execution instruction set, triggering voltage regulation operation of each power supply node to suppress voltage fluctuation.

Embodiments of the present application provide a kind of rail transit traction power supply system flexible mutual aid topology structure and its control method, belong to rail transit power supply technical field.The topology structure includes: traction power supply system, including multiple traction power supply subarea and corresponding main station;Three-port power electronic converter, first AC port and second AC port are connected to corresponding traction power supply subarea respectively, the third AC port of three-port power electronic converter is connected to city distribution network;Power mutual aid dispatching center, through communication link with three-port power electronic converter, city grid and traction power supply system connection, for collecting the multi-source data of city grid and traction power supply system, and based on multi-source data, three-port power electronic converter is controlled.The present application scheme realizes the electric energy two-way flexible mutual aid between rail transit traction power supply system and city grid, improves distributed photovoltaic consumption capacity and promotes grid collaborative operation stability.

The present application relates to and is suitable for the track return current power supply system of the metro train with direct current power supply, the scheme in the application provides a method for reducing the stray current generated by the metro running rail power return current, a connection branch formed by parallel inductance, super capacitor, IGBT switch, contactor and the like is adopted, and the conduction and flow direction of the intelligent control current is used to effectively filter the harmonic components of the return current, which can effectively reduce the leakage of the stray current harmonic components generated by the harmonic of the inverter switch circuit of the train to the outside of the running track itself, and prevent the electrochemical corrosion from harming other facilities and equipment.

The utility model relates to the technical field of electrified railway traction power supply, and particularly discloses a standby-considered uplink and downlink ground automatic neutral section passing commutation device, which is based on a standby commutation process, can timely respond and control a standby neutral section passing device to replace commutation action to continue to complete commutation when the neutral section passing device breaks down, so that the standby neutral section passing device is prevented from being damaged. The tight connection of the standby neutral section passing device in the uplink and downlink ground automatic neutral section passing commutation considering standby is realized, and the stability of train commutation entering the neutral section area is improved.

The application discloses a real-time dynamic cloud capacity algorithm for a transformer of a traction power supply system, and particularly compares the load power of left and right power supply arms with the rated power of left and right windings of the transformer in real time to determine whether expansion is needed and how to expand. The algorithm uses power compensation resources such as the left and right windings of the transformer, the left and right windings of adjacent transformers and energy storage devices, and based on the compensation strategy of priority levels of the power compensation resources, the algorithm calculates the compensation power values that the power compensation resources should provide at the moment, controls the corresponding energy-saving devices to output corresponding compensation power in real time according to the compensation power values, and completes real-time dynamic expansion of the transformer. With the algorithm, the traction substation does not need to replace a transformer with large capacity, but only needs to use existing high-power power electronic energy-saving devices to realize real-time dynamic expansion of the transformer of the traction substation through cloud algorithm.

The present application relates to a kind of conveying trolley systems, with: conveying trolley, along track travel;Control device, control conveying trolley;And power supply device, for the multiple intervals of track being divided into each interval setting.For multiple power supply devices respectively have the monitoring device of monitoring the state of this power supply device, and the communication device of the monitoring result of monitoring device is sent to control device.Control device controls conveying trolley according to monitoring result.

An electric power supply apparatus for external devices of an overhead hoist transport system using a high frequency track cable, the electric power supply apparatus being conveniently installed without specific machining of a structure having a high frequency track cable laid therein on a side of an overhead hoist transport system adjacent to external devices installed to monitor the state of tracks or a carriage and the electric power supply apparatus being supplied with inductive power using magnetic induction through a magnetic field generated by the high frequency track cable to be able to supply power for operation of the external devices, thereby not requiring specific machining of a structure for changing the structure of existing overhead hoist transport systems or attaching an electric power supply apparatus.

The present application provides a traction network two-way feeding power supply ride-through power utilization system, and a control method, relating to the technical field of electrified railway power supply. The system comprises: a power conversion device BCSa and a controller CCa that are arranged at a substation TSa; a power conversion device BCSb and a controller CCb that are arranged at a substation TSb; and a traction network OCS between the substation TSa and the substation TSb, said traction network OCS using two-way feeding power supply; the controller CCa is used for acquiring power information of the substation TSa in real time, and the controller CCb is used for acquiring power information of the substation TSb in real time; the controller CCa and the controller CCb perform information exchange in respect of an OFL via optical fiber, on the basis of the result of the information exchange, either the controller CCa controls the power conversion device BCSa to use ride-through power or the controller CCb controls the power conversion device BCSb to use ride-through power, such that ride-through power returned to the power grid meets a preset requirement.

The invention discloses a high-voltage energy control network power supply system and a control method, and belongs to the technical field of railway power transmission and power utilization. The system comprises an external power supply, a voltage regulation and phase modulation device, a high-voltage energy control net, a voltage reduction station, a medium-voltage looped network, a traction and mixing station and a traction net, the first step-down station is connected with the high-voltage energy-controlling net through a main inlet wire, the first external power supplies provide electric energy for the high-voltage energy-controlling net, the high-voltage energy-controlling net is electrically connected, n is greater than or equal to 2, at most one of the n first external power supplies is not provided with a voltage-regulating and phase-regulating device, and the voltage-regulating and phase-regulating device is used for actively regulating the amplitude and phase of output voltage. The high-voltage energy control net is additionally arranged between the first external power source and the medium-voltage looped network, the first external power source adjusts the voltage and the phase to be consistent through the voltage and phase adjusting device and supplies power to the high-voltage energy control net together, the whole high-voltage energy control net is electrically connected, the power supply capacity is remarkably improved, long-distance power supply is achieved, and supply and demand cooperation of an electric power system can be participated; the internal power flow is adjustable and controllable, and the characteristics of flexibility and intelligence are realized.

The invention discloses a train-ground good control method and system for regenerative braking of an urban rail train. A hybrid energy storage framework comprising an energy type ground energy storage system and an energy type railway energy storage system is evaluated. In the planning stage, a multi-objective optimization algorithm is adopted for coordinating and searching for capacity configuration of an optimal vehicle-ground standby system, initial investment is balanced, and energy conservation and high efficiency are achieved. And real-time and good charging time table control: during operation, setting and accessing mutually independent voltage threshold groups with strategic differences for the vehicle-ground energy storage system, and constructing a priority scheduling priority. And online self-adaptive threshold correction: according to the actual energy variation of the energy storage system monitored and counted in real time, dynamically parameters the threshold reference value so as to adapt to the working condition change. Through vehicle-ground coordination, the emergency of a single power grid scheme is overcome, the comprehensive benefit of regenerated energy can be obviously improved, the obtained power grid voltage stability is optimized, and the power grid voltage stability is enhanced.

The present disclosure relates to the field of direct current traction power supply system technologies, and more particularly, to a dynamic collaborative control method for a flexible direct current traction power supply system based on approximate optimization. The method includes: obtaining an instantaneous direct current voltage vector and an instantaneous direct current vector of a traction substation in the flexible direct current traction power supply system; decomposing the flexible direct current traction power supply system according to a circuit superposition principle, and deriving a load component of a traction substation current from the instantaneous direct current voltage vector and the instantaneous direct current vector of the traction substation based on a decomposed flexible direct current traction power supply system; calculating a collaborative component control instruction of the traction substation current according to an analytical mapping relationship between the load component of the traction substation current and the collaborative component control instruction of the traction substation current; further solving a traction substation voltage control instruction based on proportional integration and feedforward control, and controlling operation of the traction substation by using the traction substation voltage control instruction. In this way, a problem in the related art that an optimal control method only considers steady-state modeling and fails to perform real-time control accurately and rapidly is solved.

The present invention relates to a printed circuit board device enabling the measurement of at least one electrical quantity, said device comprising a printed circuit board (1), referred to as motherboard (1), having a face, referred to as main face (1a), a measuring device enabling the measurement of at least one electrical quantity and the generation of measurement signals and at least one current-conducting track (3) for measurement.It is characterized in that it further comprises an additional printed circuit board, called daughterboard (2), having two opposite faces and being connected directly to the main face (1a) of the motherboard (1) by being held substantially perpendicular to the motherboard (1), in that the conductive track or each conductive track (3) comprises a main part (30, 30') extending over the main face (1a) of the motherboard (1) and a transition part extending over the two faces (20, 20') of the daughterboard (2) by passing through it, the main part (30, 30') comprising two main segments (30, 30') on either side of the daughterboard (2), each connected, by a conductive link (8), to the transition part of said conductive track (3) and in that the measuring device is implanted on the daughterboard (2) by being connected to the or one of the conductive transition parts.

The application is applied to the fields of train regenerative braking energy utilization, stray current and track potential treatment in electrified rail transit, especially urban rail transit. The application provides a DC traction power supply system for reducing the super capacitor energy storage capacity of urban rail transit, which is combined with the super capacitor energy storage device of urban rail transit, and uses the train regenerative braking energy to supply power to the power electronic device for treating stray current and track potential. The application has the following advantages: on the one hand, the super capacitor group in the super capacitor energy storage device can reduce the energy storage capacity between train braking and traction, and improve the regenerative braking energy utilization efficiency of the super capacitor group; on the other hand, the problem of stray current and track potential in the system can be solved from the source, and the power supply distance of the traction substation can be significantly improved. Therefore, the DC traction power supply system has important significance for green and safe operation of urban rail transit.

The invention provides a linear power flow calculation method and device of a power grid-AT traction network coupling system, and relates to the technical field of power system data processing. The sinusoidal quantity in the phase angle decoupling active injection formula is linearized through a sinusoidal quantity linearization formula, and the voltage amplitude-phase in the phase angle decoupling active injection formula is decoupled and the voltage amplitudes are decoupled through a voltage amplitude and phase decoupling formula; and decoupling the reactive power injection formula through a phase angle decoupling formula, a sinusoidal quantity linearization formula and a voltage amplitude and phase decoupling formula to obtain a linearly decoupled single-phase reactive power injection formula. The load flow calculation is carried out based on the linearly decoupled single-phase active injection formula and the linearly decoupled single-phase reactive injection formula, and the effect of improving the calculation efficiency can be achieved.

The invention discloses a traction power supply integrated energy control method, which is based on a railway traction power supply integrated energy system and comprises a railway energy router, a low-voltage direct-current bus, a power generation source, a direct-current converter, an energy storage device and a controller, a direct-current port of the railway energy router is connected with the low-voltage direct-current bus, an alternating-current side a-phase port is connected with a railway traction power supply a phase, and an alternating-current side b-phase port is connected with a railway traction power supply b phase; the power generation source outputs controllable direct current through the direct-current converter and then is connected to the low-voltage direct-current bus. An energy storage direct-hanging low-voltage direct-current bus; comprising the steps that a controller adopts constant-current closed-loop control on a power generation source based on low-voltage direct-current bus voltage actively clamped by stored energy, it is ensured that the power generation source outputs optimized current through a direct-current converter, a railway energy router is controlled, and power interaction between the power generation source and stored energy and a phase a and a phase b of railway traction power supply is achieved. According to the invention, the problems of integrating renewable new energy and accessing the low-voltage direct-current bus of the railway energy router without DC-DC energy storage are solved.

To provide a simulation system of a railway system for a Medium-Voltage Direct Current (MVDC) distribution network.SOLUTION: In the simulation system, a converter station model simulates a converter station included in the MVDC distribution network, a train operation model simulates an operation state of a train, and a converter controller controls a DC / DC converter included in the converter station model. The simulation system includes a Hardware In the Loop Simulation (HILS) device which performs a simulation based on the converter station model, the train operation model and the converter controller. The converter station model and the train operation model are executed in software by the HILS device, and the converter controller is connected to the HILS device and driven to control the converter station model.SELECTED DRAWING: Figure 6

The invention provides a dynamic cooperative control method for regenerative energy of a traction power supply system fused with power prediction, and relates to the technical field of traction power supply systems, and the method comprises the steps: obtaining a plurality of train position vectors of a plurality of running trains; executing dual-thread asynchronous matching to obtain a plurality of line environment characteristic parameters and a plurality of multi-source sensor dynamic fusion weights; multiple pieces of train operation state data are collected; constructing a plurality of spatio-temporal joint feature vectors; working condition migration probability prediction is carried out, and a plurality of ultra-short-term net power demands are output; power supply interval topology affiliation prediction is carried out, and a plurality of power supply interval topology codes are positioned; and according to the space-time coupling relationship, executing the dynamic closed-loop cooperative control of the regenerated energy of the far-end traction power supply system. The technical problem that a traction power supply system in the prior art depends on a simple load distribution rule and cannot respond to severe load fluctuation in time, so that power distribution is uneven, and the stability of a power grid is affected is solved.

The invention relates to a rotary joint (1) having a damping device (6), to a side holder (20) having such a rotary joint (1), to an overhead line system having at least one side holder (20), and to a method for adjusting the damping of a side holder (20) having a rotary joint (1) according to the invention, wherein the rotary joint (1) has a housing (2), a joint pin (3), which passes through the housing (2), the joint pin (3) having a first end element (4) at one end and a second end element (5) at the opposite end, and at least one damping device (6), the damping device (6) having at least one first friction element (7) and one second friction element (8), and the at least two friction elements (7, 8) of the damping device (6) being arranged on the joint pin (3) outside the housing (2) and being directly in contact, and the at least one damping device (6) of the rotary joint (1) having at least one adjustment element (10) which is arranged on the joint pin (3) and with which the transmission of force between the at least two friction elements (7; 8) is adjustable.