148 results about "Distribution transformer" patented technology

The application belongs to the technical field of power distribution network automation, and particularly relates to a power distribution transformer intelligent regulation and control method and system based on energy efficiency evaluation, which comprises the following steps: collecting the low-voltage side current, rated current, no-load loss and load loss of a power distribution transformer, and calculating the load rate; obtaining the fluctuation intensity according to the standard deviation of the load rate in a sliding window, and obtaining the change gradient by subtracting the load rates at adjacent time points; obtaining the direction consistency index according to the consistent degree of the directions of the change gradient in a preset number of steps; calculating the noise covariance according to the fluctuation intensity and the direction consistency index, and obtaining the smoothed load rate by substituting the Kalman filter equation; dynamically determining the threshold step number according to the direction consistency index, calculating the smoothed total loss, and determining the preset energy efficiency threshold according to the no-load loss and the load loss. The application reduces the tap changer regulation frequency and prolongs the service life of the contact.

The application discloses a triangular on-load voltage regulating tap switch and distribution transformer, which comprises a triangular shell, a time sequence contact assembly arranged in a strip layout in the shell and connected in series through a same square shaft, a wiring terminal arranged at each side of the triangular structure of the shell, and a stepping motor horizontally arranged in the shell and arranged in the same direction with the square shaft. The time sequence contact assembly comprises a support seat, a time sequence system arranged on the support seat, and a contact assembly. The time sequence system controls the opening and closing sequence of the vacuum arc-extinguishing chamber, and the contact assembly is driven by the stepping motor to realize gear shifting. The whole switch is installed below the transformer box cover. The application has the advantages of compact structure, convenient wiring, and reliable sealing ensured by integral buried installation. The pure mechanical time sequence system with a transmission ratio of 9:4 synchronizes the gear stepping and time sequence action, can stably realize 9-gear wide-range on-load voltage regulation, and improves the power supply reliability and equipment service life.

This invention discloses an overload-resistant heat dissipation distribution transformer, comprising a transformer body with multiple heat dissipation pipes at both ends. The upper and lower ends of each heat dissipation pipe are connected to a manifold, which is interconnected with the transformer body. A heat dissipation cleaning component is slidably connected to the heat dissipation pipe, and a water storage component is installed on the upper manifold. A reciprocating screw is driven to the heat dissipation cleaning component. This device features fully automatic reciprocating pipe wall cleaning, relying on the reciprocating screw to drive the heat dissipation cleaning component to continuously move up and down. Through symmetrically arranged cleaning rings and cleaning cotton, it achieves full-stroke, dead-angle-free descaling of the heat dissipation pipe. Combined with a spring-loaded elastic contact structure and end-beveled anti-scratch design, it can continuously remove dust, oil, and stubborn dirt from the pipe wall without damaging the equipment structure, thoroughly solving the problems of easy scale accumulation and gradual decline in heat dissipation efficiency in traditional distribution transformer heat dissipation pipes.

The invention belongs to the technical field of electric control cabinets, and particularly discloses a direct-current voltage control device and method for a multi-terminal flexible direct-current system, and the device comprises an electric control cabinet which is internally provided with a flexible interconnection device and is used for achieving the seamless interconnection of two distribution transformers at a direct-current side; and the monitoring probe is horizontally inserted into the side surface of the electric control cabinet, and the monitoring probe is mounted in the electric control cabinet through a connecting part. The rotating rod is installed in the through groove of the inner ring in a rotating mode, the two opposite swing rods limit the side edge of the outer side end of the rotating rod through the pressing head under the elastic force effect of the first elastic piece, the outer side ends of the swing rods extrude the inner side wall of the inner ring groove, it is guaranteed that the monitoring probe is rapidly installed in the electric control cabinet, and the monitoring efficiency is improved. And the monitoring probe can be quickly taken out from the interior of the electric control cabinet in a reverse rotation mode.

The distribution transformer tap adjustment method based on comprehensive analysis and evaluation includes: acquiring distribution substation operation data and related data of the distribution transformer; establishing a comprehensive evaluation system index; establishing an optimization model for distribution transformer tap adjustment; and using the NSGA-II algorithm based on a subjective-objective coupled weighting method to optimize the distribution transformer taps and obtain the optimal adjustment command. This method not only considers traditional voltage quality and equipment loss issues but also introduces comprehensive indicators such as distribution transformer utilization rate. Valuable information is extracted from a large amount of operational data. Through the analysis and processing of historical data, relevant models are established, and multi-objective optimization algorithms are used to enable the distribution transformer to provide the optimal tap adjustment command based on real-time data and multi-dimensional evaluation indicators.

The application provides a three-phase distribution transformer life prediction method and system based on winding ratio in the field of distribution transformer service life prediction, and aims to economically, efficiently and non-destructively predict the service life of a three-phase distribution transformer. The system comprises a communication module, an acquisition module, a storage module and a data processing module. The winding ratio is calculated according to the monitored voltage and current data of the three-phase distribution transformer. The sensitivity of the winding ratio to time is calculated according to the winding ratio on the current day and the winding ratio on the n-1 days before the current day. The life prediction model is established according to the sensitivity of the winding ratio to time, the winding ratio value under serious defects and the winding ratio on the current day. The value of the winding ratio on the current day is substituted into the life prediction model to calculate the remaining life since the current day.

A hybrid transformer apparatus and a control method thereof are provided. The hybrid transformer apparatus includes at least one power electronic module having a parallel converter and a series converter electrically connected to form a hybrid converter. The parallel converter is electrically connected to the low voltage side of a distribution transformer. A controller controls the signals of the parallel converter and the series converter, including switching switches, a bypass circuit, and a compensation transformer. The controller reduces load voltage variation in response to changes in input voltage. A communication device transmits voltage and current information to the controller. The hybrid transformer apparatus also includes a circuit breaker and a bypass circuit.

This utility model discloses a three-dimensional wound core low-loss intelligent distribution transformer, relating to the field of distribution transformer technology. It includes a transformer body and a docking base plate. A fixed base is provided on the lower surface of the docking base plate. Multiple heat dissipation components are equidistantly installed on the outer wall of the transformer body. The fixed base is provided with a docking mechanism for convenient docking and fixing of the fixed base and the docking base plate. This utility model, through the docking mechanism, enables precise docking between the fixed base and the docking base plate, significantly reducing the alignment difficulty during transformer body hoisting and installation, effectively improving the convenience of docking between the fixed base and the docking base plate. After the transformer body is rotated to the designated position, the docking base plate can be easily engaged, positioned, and locked, ensuring the structural stability of the transformer body after installation and effectively preventing loosening of connections due to vibration and other factors, thereby further improving the efficiency of transformer body installation.

The application discloses a hybrid voltage transformation device and a control method thereof. The hybrid voltage transformation device comprises at least one power electronic module, a controller, a communication device, a circuit breaker and a bypass circuit. The power electronic module comprises a parallel converter and a series converter which are electrically connected to form a hybrid converter, and the parallel converter is electrically connected to a low-voltage side of a distribution transformer. The controller controls signals of at least one of the first to fourth switching switches of the parallel converter and the series converter, the bypass circuit and the compensation transformer according to the number of the power electronic modules, and reduces the change of the load voltage when the voltage of the input power electronic module changes. The communication device transmits voltage and current information to the controller.

The application discloses a low magnetic permeability amorphous alloy, characterized in that the low magnetic permeability amorphous alloy is formed by segmental magnetic field heat treatment of an iron-based alloy disordered structure strip, and the alloy composition of the iron-based alloy disordered structure strip is Fe-Si-B-M, wherein M is one or more of C, Co, Nb, Mn, Cu and Ni. The application reduces the dislocation dipole density of the alloy, improves the structural disorder, effectively releases the internal stress, and combines the uniform magnetic anisotropy induced by the segmental magnetic field, so as to realize the low magnetic permeability and low loss of the amorphous alloy. The application further discloses a preparation method of the low magnetic permeability amorphous alloy and application of the low magnetic permeability amorphous alloy to a hybrid magnetic circuit distribution transformer.

This invention discloses a method and system for matching distribution transformer substations for mobile energy storage and power supply matching, relating to the field of distribution network operation and planning technology. The method includes: determining the duration of voltage exceeding the upper limit for each substation based on the low-voltage side voltage sequence of the substation's distribution transformers; identifying photovoltaic backfeed substations by combining distributed photovoltaic installed capacity; determining the number of households experiencing voltage exceeding the limit in each substation based on the substation user voltage data sequence, and identifying substations experiencing voltage exceeding the lower limit; constructing candidate combinations based on the two types of substations; using the latitude and longitude coordinates of the substation distribution transformers and road network data for road constraint screening to obtain effective candidate combinations; calculating time-period matching score, distance matching score, and supply-demand adaptation matching score for each effective candidate combination; and then calculating a comprehensive matching score, outputting the priority matching result according to the ranking result. This invention prioritizes matching substation combinations with severe voltage exceeding limits under limited resource constraints, providing a decision-making basis for the phased construction of charging and discharging infrastructure.

The present application belongs to the technical field of power distribution network energy efficiency analysis, and provides a real-time estimation method and system for distribution transformer additional loss based on quantile envelope and dynamic characteristics. The present application fuses real-time electrical and rated electrical data of the transformer, adopts low quantile point envelope regression technology to accurately fit the benchmark loss envelope model in a strong noise environment, combines a dynamic adjustable exponential characteristic construction mechanism to adaptively learn the optimal nonlinear mapping relationship of the load rate, and continuously tracks the state change of the distribution transformer based on a sliding window retraining trigger mechanism, finally realizes real-time stripping and quantification of the additional loss component, that is, through dynamic calculation of the instantaneous non-negative additional loss and its time cumulative amount, provides high-precision, adaptive and implementable quantitative decision basis for harmonic pollution control and energy saving optimization of core energy-consuming equipment.

This invention relates to the field of distribution transformer voltage management technology, and more particularly to a distribution transformer voltage management system, comprising an edge sensing and autonomy module, a resource aggregation and control module, a cloud-edge collaboration and optimization module, a flexible interconnection and mutual assistance module, and a proactive and passive responsibility quantification and traceability module. This invention avoids communication delays dependent on cloud-based decision-making, achieving millisecond- to second-level rapid response, improving renewable energy absorption capacity and overall resource utilization efficiency, ensuring the most appropriate control methods are employed in different scenarios, guaranteeing reliable transmission of control commands under complex electromagnetic environments or channel degradation conditions, ensuring system robustness, significantly improving power supply reliability and disaster resistance, promoting the transformation of voltage management from passive response to proactive prevention and refined management, reducing reliance on manual inspections, remote control, and on-site debugging, lowering operation and maintenance complexity and costs, and simultaneously improving the overall automation and intelligence level of distribution network distribution transformer voltage management.

The application belongs to the technical field of electric control cabinets, and particularly discloses a multi-terminal flexible DC system DC voltage control device and method, which comprises an electric control cabinet, wherein a flexible interconnection device is built in the electric control cabinet and is used for realizing seamless interconnection of two distribution transformers on the DC side; and a monitoring probe is horizontally inserted into the side of the electric control cabinet and is installed in the electric control cabinet through a connecting component. The rotating mode is adopted to install the rotating rod in the through slot of the inner ring, the opposite two swing rods limit the side of the outer side end of the rotating rod through the pressure head under the elastic force of the first elastic member, and the outer side end of the swing rod extrudes the inner side wall of the inner ring slot, so that the monitoring probe is quickly installed in the electric control cabinet, and the monitoring probe can also be quickly taken out from the electric control cabinet through the reverse rotating mode.

In a charging station regulation method and device, a storage medium and a computer device provided in the application, if the charging station is in an energy-saving and consumption-reducing mode, the distribution transformer load rate of the charging station is calculated; when the distribution transformer load rate is greater than a distribution transformer load rate threshold, the energy storage device and / or each charging pile in the charging station are regulated according to the size relationship between the storage power and the rated power of the energy storage device corresponding to the charging station; if the charging station is in a regulation demand response mode, the energy storage device and / or each target charging pile are regulated according to the size relationship between the dischargeable time length of the energy storage device and the regulation required time length; when the regulated load of the charging station reaches the regulation required load, or after each target charging pile participates in the regulation, the regulated time length of the charging station does not reach the regulation required time length, the energy storage device and / or each non-target charging pile with a cuttable charging time length not greater than the regulation required time length are regulated. In this way, the regulation requirements of the charging station in different scenarios can be met.

The application relates to a data-driven power distribution line theoretical line loss calculation method and system, which comprises the following steps: firstly, pre-processing line measurement data, distribution transformer measurement data and tie-in junction measurement data; then, calculating the no-load loss and load loss of each connection distribution transformer in the network; on the basis of automatically calculating the distribution transformer gear, the branch loss of each node of the distribution transformer is calculated; the no-load loss, load loss and branch loss of the distribution transformer in the network are accumulated to obtain the network loss; and the ratio of the network loss to the network input power is obtained, that is, the power distribution line theoretical line loss value.

This application provides a method and apparatus for power control of flexible distribution transformer substations in weak current grids, belonging to the field of power electronics technology. The method includes: acquiring a first output power of a first substation, and determining whether the first output power is within an allowable output power range; if the first output power is not within the allowable output power range, adjusting the first output power so that the first output power is within the allowable output power range. This application can solve the problem of power distribution system downtime caused by excessively long power supply lines in weak current grids.

This invention relates to the field of energy-saving technology for distribution transformers, and discloses a method and system for optimizing energy saving in distribution transformers based on intelligent switching technology. The method uses intelligent terminals deployed on the low-voltage side of the distribution transformer to accurately collect real-time operating parameters such as load current, voltage deviation rate, temperature rise rate, and power factor of multiple adjacent transformers. Based on these parameters, a dynamic feature tensor reflecting the collaborative operating status of the transformer cluster is constructed, and an adaptive sliding window algorithm is used to perform piecewise normalization processing in the time dimension. The normalized tensor is input into an operating mode decision model based on a deep dynamic graph neural network, and the output is a decision vector containing the optimal switching combination strategy. This vector includes key information such as single-unit operating identifiers and parallel operating identifiers. A control command sequence is generated based on the decision vector and sent to the circuit breaker actuators of each transformer through the distributed communication protocol of the intelligent terminal, realizing automatic switching of operating modes.

1. Name of the designed product: transformer monitoring box. 2. Use of the designed product: for monitoring distribution transformer. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

A object temperature monitoring apparatus includes a first housing configured for attachment to an object, such as an electrical distribution transformer, and a thermistor module coupled to or integrated with the first housing. The thermistor module includes a second housing and a thermistor. The second housing includes an elastic boot and a thermistor compartment adjacent to the elastic boot. The thermistor is positioned within the thermistor compartment and oriented to sense a temperature of the object when the first housing is attached to the object and the thermistor compartment is placed against a surface of the object. The elastic boot may be constructed to allow movement of the thermistor compartment when it is compressed against the surface of the object to enable the thermistor compartment to form a seal against the object's surface to prevent ambient air from affecting temperature measurements.

The application provides a rural power grid multi-element distributed resource aggregation substation energy autonomous system, method and control system, equipment and medium, the system comprises a multi-element distributed resource access module, a communication management module, a distribution transformer access module and a substation energy autonomous management and control module; the substation energy autonomous management and control module is in communication connection with a superior dispatching management system, is used for operating or receiving a superior dispatching management system instruction through a man-machine interface, and generates a control instruction to adjust the operating state and operating value of the multi-element distributed resource in the substation based on the related data of the multi-element distributed resource and the operating data of the distribution transformer according to a preset autonomous strategy logic, promotes full consumption of distributed photovoltaic, guarantees safe operation of the distribution transformer and voltage stability of the substation, and reduces power grid regulation and control cost.

This invention relates to the field of smart grid and distribution network automation technology, and discloses a method and system for fault location in distribution transformer areas based on power line carrier time synchronization. The key technical points are: addressing the problems of difficulty in deploying high-precision time synchronization networks in existing low-voltage distribution transformer areas, power line carrier communication interference traveling wave feature extraction, and poor robustness of single ranging algorithms, this invention adopts a power line carrier microsecond-level synchronization mechanism with hardware delay compensation, combined with distributed terminal local active cancellation of carrier interference based on preamble channel estimation and lightweight extraction of fault features, and through intelligent fusion terminal collaborative judgment based on traveling wave and power frequency impedance multi-source algorithm with dynamic confidence weight, high-precision fault location in complex low-voltage distribution transformer areas is achieved.

This invention discloses a three-dimensional wound core distribution transformer oil tank with spiral flow guiding and zoned cooling fins, including an oil tank body, an oil conservator, a three-dimensional wound core body, multiple windings, two cooling fin groups, a forced air cooling device, and an oil tank base. The multiple windings are respectively mounted on multiple columns of the three-dimensional wound core body, which is fixedly installed on the oil tank base. This invention significantly extends the flow path of transformer oil in the winding area by constructing spiral flow guiding channels inside the windings. Combined with the tip-oriented design of the teardrop-shaped flow guiding blocks, it effectively guides the oil to flow along a predetermined path, avoiding the stable eddy current phenomenon easily formed in traditional vertical oil channels, thereby improving cooling uniformity. The through holes and interlayer spacers on the support bars are arranged alternately, providing auxiliary channels for lateral flow of oil while maintaining the strength of the insulation structure, promoting heat exchange and mixing of the oil between layers, and preventing localized overheating.

The application provides a wide-range on-load voltage regulation voltage compensation control method and system, and an AC / DC / AC converter is connected to the output of an on-load voltage regulation transformer. The converter mainly comprises a parallel side and a series side, and the output of the series side converter is connected to a series transformer. Output voltage regulation is combined with on-load voltage regulation distribution transformer gear adjustment and converter series compensation. Converter capacity configuration considers voltage compensation range, three-phase imbalance compensation, reactive power compensation, thermal effect caused by harmonic compensation and maximum current stress of the converter output. The series side converter output voltage compensation adopts a positive and negative sequence separation control algorithm. The scheme can realize wide-range output voltage stepless compensation regulation, can flexibly limit the current inner loop of the series side converter, avoids equipment overload, and improves equipment reliability.