46 results about "Transformation ratio" patented technology

The invention relates to a method for decoupling organic matter primary-secondary cracking hydrocarbon generation conversion rate based on a gold tube hydrocarbon generation thermal simulation experiment. The method comprises the following steps: step 1, acquiring kerogen gold tube hydrocarbon generation thermal simulation experiment data; step 2, parametric modeling of the kerogen hydrocarbon generation process; step 3, constructing a least square target model under a multi-constraint condition; step 4, performing nonlinear least square optimization solution under the constraint condition; and 5, calculating the hydrocarbon generation conversion rate. According to the method, conversion rate calculation is carried out on the cumulant of each hydrocarbon generation process obtained through decoupling, the conversion rate evolution rule of the kerogen oil generation, gas generation, crude oil cracking gas generation, non-reactive carbon formation and other processes along with maturity change in the crude oil cracking process can be obtained, and a quantitative basis is provided for refined hydrocarbon generation evaluation.

The invention relates to a method for decoupling organic matter primary-secondary cracking hydrocarbon generation conversion rate based on gold tube hydrocarbon generation thermal simulation-solid product pyrolysis experiment. The method comprises the following steps: step 1, kerogen gold tube hydrocarbon generation simulation and solid product rock pyrolysis experiment data acquisition; step 2, parametric modeling of the kerogen hydrocarbon generation process; step 3, constructing a least square model of multi-source experimental information collaborative constraint; 4, carrying out optimization solution under a multi-source experiment information collaborative constraint condition; and 5, calculating the hydrocarbon generation conversion rate. According to the method, conversion rate evolution characteristics of each hydrocarbon generation process are quantitatively represented, conversion rate calculation is performed on cumulant of each hydrocarbon generation process obtained through decoupling, and conversion rate evolution rules of kerogen oil generation, kerogen gas generation, crude oil cracking gas generation, non-reactive carbon formation and other processes along with maturity changes in the crude oil cracking process can be obtained; and a quantitative basis is provided for refined hydrocarbon generation evaluation.

The application relates to a method for decoupling primary-secondary cracking hydrocarbon generation conversion rates of organic matter based on a gold tube hydrocarbon generation thermal simulation-solid product pyrolysis experiment, which comprises the following steps: step 1, kerogen gold tube hydrocarbon generation simulation and solid product rock pyrolysis experiment data acquisition; step 2, parameterized modeling of the kerogen hydrocarbon generation process; step 3, construction of a least square model cooperatively constrained by multi-source experimental information; step 4, optimization solution under the cooperatively constrained condition of multi-source experimental information; and step 5, hydrocarbon generation conversion rate calculation. The application quantitatively characterizes the conversion rate evolution characteristics of each hydrocarbon generation process, and through conversion rate calculation on the cumulative amount of each hydrocarbon generation process obtained by decoupling, the conversion rate evolution law of the kerogen oil generation, gas generation and oil cracking process, the oil cracking gas formation and the unreactive carbon formation process with the change of the maturity can be obtained, and a quantitative basis for fine hydrocarbon generation evaluation is provided.

The application relates to the technical field of metrological calibration, and discloses a multi-voltage-grade capacitor current tester calibration method based on unified transformation ratio. The method comprises the following steps: screening unified transformation ratio parameters meeting range constraints and error constraints, obtaining a ratio difference parameter of a corresponding electromagnetic voltage transformer, obtaining a capacitance ratio difference correction factor, calculating conversion coefficients under each voltage grade, determining a primary side capacitance setting value according to a preset primary side calibration capacitance value and the conversion coefficients, obtaining a secondary side output capacitance value of a standard capacitance tank, and collecting a displayed capacitance value and a displayed capacitance current value. The conversion coefficients between the unified transformation ratio and the theoretical transformation ratios of each voltage grade are established, single transformation ratio is used to cover multi-voltage-grade calibration, error components introduced by the ratio difference of the electromagnetic voltage transformer in the capacitance calibration process are reduced, and different transformation ratio equipment needs to be frequently replaced.

The invention provides an efficient in-situ conversion synergistic hydrogen production method for shale oil with medium and low maturity, and belongs to the technical field of shale oil application. An upper-middle-lower three-well layout system is established, a hydrogen separation membrane layer is welded to a hydrogen production well, electric heating is matched with a conductive proppant to form an artificial fracture network, and a temperature field prediction model is adopted to dynamically regulate and control the heating power based on an artificial intelligence algorithm to maintain the optimal temperature; and an air slug and a steam slug are circularly injected to realize oxidation heat supply to promote organic matter cracking and gasification reaction with coke and other byproducts to produce hydrogen, an injection strategy is adjusted according to the ratio of the oxygen consumption rate to the coke gasification rate, and underground hydrogen separation is realized by virtue of a gravity differentiation effect and a hydrogen separation membrane. The method effectively solves the problem of low conversion rate in the in-situ conversion of the shale oil with medium and low maturity, and realizes clean and efficient underground hydrogen production.

The invention provides a pole-mounted vacuum circuit breaker and a control method thereof, and relates to the technical field of power distribution equipment of a power system. The pole-mounted vacuum circuit breaker comprises a circuit breaker body, a multi-transformation-ratio current transformer and an isolation module, and further comprises an automatic transformation ratio adjustment module which comprises a change-over switch and a first motor used for driving the change-over switch to switch taps; the electric on-off isolation module comprises a motor module used for driving the isolation module to act; and the central control unit is electrically connected with the first motor and the motor module, and is used for controlling the first motor to act according to the line load change so as to automatically switch the transformation ratio of the mutual inductor, and controlling the motor module to act according to an instruction so as to realize electric closing and opening of the isolation module. On the basis, the problems that an existing pole-mounted vacuum circuit breaker cannot adjust the transformation ratio of a mutual inductor in time according to the load requirement, and the isolation function depends on manual operation are solved.

The invention discloses a residual sensitivity matrix-based power distribution network parameter anomaly positioning and correction method. The method comprises the following steps of: determining the type of each branch of a power distribution network and then obtaining a to-be-checked parameter of each branch; obtaining actual values of active power and reactive power of each branch in the power distribution network; obtaining conductance and susceptance of each branch, calculating theoretical values of active power and reactive power of each branch according to the conductance and susceptance of each branch and the to-be-checked parameter data, and calculating an active power residual error and a reactive power residual error of each branch; constructing a sensitivity matrix and a measurement residual vector, establishing a regular equation through the sensitivity matrix and the measurement residual vector, and solving the regular equation to obtain a line length deviation value and a transformer transformation ratio deviation value; and correcting the line length and the transformer transformation ratio. According to the invention, high-precision, anti-interference and stable identification of the line length and the transformation ratio of the transformer is realized.

The invention belongs to the technical field of power system relay protection and power distribution network flexible interconnection, and discloses a flexible loop closing device body topological structure, which comprises a double-core symmetric phase-shifting transformer and a mode switching interface unit, and is characterized in that the double-core symmetric phase-shifting transformer comprises an exciting transformer bank and a series transformer bank; the mode switching interface unit is arranged on a low-voltage electric energy coupling loop between the secondary side output end of the exciting transformer bank and the secondary side input end of the series transformer bank, and the mode switching interface unit is arranged on a low-voltage electric energy coupling loop between the secondary side output end of the exciting transformer bank and the secondary side input end of the series transformer bank. And the current-limiting impedance of the secondary side is mapped to the primary side by the square times of the transformation ratio, so that on the premise of not increasing the volume and cost of the external current-limiting reactor, the self-protection and fault current suppression of the body are realized, and the organic unification of steady-state current regulation and transient current limiting is realized. The invention also discloses a virtual impedance identification-based adaptive protection method matched with the topological structure of the flexible loop closing device body.

The invention relates to the technical field of power supply control, and discloses a current space vector decoupling control method, system and device for a dual-active bridge type single-stage AC-DC converter and a medium, and the method comprises the steps: enabling the dual-active bridge type single-stage AC-DC converter to be equivalent to two independent dual-active bridge type DC-DC converters in a control period, an alternating current side three-phase current synthesis vector is decomposed to calculate an input average current, a duty ratio is determined in combination with parameters such as an input line voltage and an instantaneous voltage transformation ratio, a switch tube action logic is generated, and a current space vector decoupling modulation strategy is realized. According to the method, the problem of alternating current side transmission current distortion is solved, the actual alternating current side transmission current of the system approaches a given value more accurately, and grid side current distortion is reduced. And meanwhile, the action logic of a switching tube is accurately controlled, the internal circulation of the converter is reduced, the system efficiency is improved, the buck-boost characteristic of the dual-active bridge type single-stage AC-DC converter is exerted, and the actual requirement of an AC grid-connected energy storage system is better met.

The invention relates to a current transformer capable of automatically switching the transformation ratio and an automatic transformation ratio switching method, and belongs to the technical field of current transformers, the current transformer comprises a current transformer body, and a secondary winding of the current transformer body is provided with at least two groups of output taps with different transformation ratios; the current detection unit is used for sampling primary side current in real time and calculating an effective value; the transformation ratio switching execution unit is connected to the output tap and used for changing the effective turn ratio connected to the measurement loop; the intelligent control unit is electrically connected with the current detection unit and the transformation ratio switching execution unit; and the protection unit is used for preventing a secondary side open circuit of the current transformer body in the transformation ratio switching process and in an abnormal state. The optimal transformation ratio is dynamically calculated in combination with current real-time and historical data, the transformation ratio switching execution unit is driven to automatically adjust the effective turn ratio of the secondary winding, and the problem that the measurement precision of a traditional current transformer is reduced due to the fixed transformation ratio in a wide load range is solved.

The invention relates to a transformation ratio detection method for a low-voltage step impact type mutual inductor. The method comprises the following steps: S1, obtaining the representation of the transformation ratio N of the mutual inductor based on five basic parameters; s2, obtaining five basic parameters of the transformation ratio N of the mutual inductor; and S3, obtaining a basic parameter calculation formula of the transformation ratio N of the transformer. The transformer body is abstracted into the transfer function mathematical model, the transformation ratio of the transformer body is obtained according to the two-port transfer function of the transformer system, and the field problems that in existing transformer transformation ratio detection, personal risks are high, equipment is expensive, the weight is large, and damage is prone to occurring are solved.

A power converter includes a piezoelectric transformer comprising a piezoelectric material and metalized electrodes that form two or more ports, at least one of the two or more ports being an input port having an input port surface area, at least one of the at least two ports being an output port having an output port surface area, wherein, the piezoelectric transformer has a physical characteristic of a geometry term H comprised of piezoelectric transformer dimensions at least one of input port and output port measurements, including and a voltage swing across the input port, a voltage swing across the output port, a charge utilization at the input port, a charge utilization at the output port, an input voltage, an output voltage, and a transformation ratio.

The invention discloses a method for on-line identification of metering anomalies of a special transformer district and a public transformer district of a medium-voltage branch line, and the method comprises the following steps: (1) collecting the data of the primary side current of an outgoing line of the medium-voltage branch line through power distribution automation equipment; meanwhile, according to the secondary side current data, collected by the main metering collection device, of all the special transformer and public transformer metering devices under the branch lines, the real-time data change trend is determined by combining the transformation ratio data of the current transformers of the special transformer and public transformer districts; (2) judging whether the secondary current is abnormal or not according to the real-time data change, and (3) in the same period, if delta is greater than 10%, indicating that the secondary side current of the special transformer or the public transformer under the branch line is abnormal, and automatically assigning the abnormal medium-voltage branch line to related workers by the system. According to the invention, the online identification of the metering abnormity of the special transformer and public transformer districts on the medium-voltage branch lines is realized for the first time, and the problem that the abnormal special transformers and public transformers cannot be identified in time due to the large number of medium-voltage branch lines and the large number of special transformers and public transformers for a long time is solved.

The invention relates to the technical field of power supply phase shift voltage regulation, in particular to a double-input vector fine phase shift method, device and equipment for a GIS same-frequency and same-phase voltage withstand test, and the method comprises the steps: firstly, determining a three-phase test power supply, selecting a two-phase power supply from the three-phase test power supply, and then respectively connecting the selected two-phase power supply to independent voltage regulators; the output end of one voltage regulator is connected to the positive end of the primary winding of the exciting transformer, the output end of the other voltage regulator is connected to the negative end of the primary winding of the exciting transformer, finally, a reference signal is obtained, the transformation ratio of the voltage regulators is adjusted, and the exciting transformer outputs voltage consistent with the reference signal in phase. The device solves the problems of high cost, low reliability and harmonic pollution generation in the prior art, and has the beneficial effects of high reliability, quick response, low cost, no harmonic pollution and simple structure.

1. The name of the design product: high-voltage solid-enclosed pole mutual inductor. 2. The use of the design product: mainly to transform large current into small current according to the corresponding transformation ratio for protection and metering. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view. 5. The rear view is symmetrical with the front view, and the rear view is omitted.

The invention relates to a rectifier arrangement for hydrogen electrolysis, comprising a transformer (1) with a primary winding (2) for connecting an input alternating voltage and a secondary winding (3) for providing an output alternating voltage, and comprising a rectifier (4) connected to the secondary winding (3) for generating an output direct current IDC and an output direct voltage UDC, wherein at the primary winding (2) of the transformer (1) a number N>1 of winding taps (5) are provided, and a load stage switch (6) connected to a controller (7) is provided which is designed for switching the winding taps (5) without interruption such that the transformation ratio of the transformer (1) can be switched via the controller (7) in N stages.

The present application belongs to the technical field of oil exploration, and relates to a method for identifying late-stage natural gas charging proportion. The method comprises the following steps: calculating a crude oil conversion rate; calculating a calculated value of a gas-oil ratio of a reservoir; establishing a corresponding relationship between the sum of the absolute concentrations of 3-methyl durene and 4-methyl durene and a measured value of the gas-oil ratio of the reservoir; taking the sum of the angle concentrations as a benchmark, adjusting the calculated value of the gas-oil ratio of the reservoir, so that the late-stage natural gas proportion is 0-99%, and obtaining a late-stage natural gas charging proportion identification chart; detecting the sum of the absolute concentrations of 3-methyl durene and 4-methyl durene in the crude oil to be evaluated; and based on the sum of the absolute concentrations and the measured value of the gas-oil ratio of the reservoir, according to the late-stage natural gas charging proportion identification chart, the identification of the late-stage natural gas charging proportion in the oil and gas reservoir to be evaluated is realized. The method is fast, intuitive and easy to operate, and improves the speed and accuracy of the identification of the late-stage natural gas charging proportion.

The invention discloses a single-core step-down phase shifter based on thyristor control and a winding transformation ratio design and multi-mode control method thereof, and the maximum utilization of the winding capacity of the phase shifter and the minimum adjustment step length in the adjustment process are realized through the transformation ratio design of a secondary winding of the phase shifter; when no fault is detected, the transformation ratio of the winding is controlled through the thyristor valve group so as to execute voltage reduction and phase shift operation, the output voltage amplitude and the phase shift angle are kept at reference values, and the system runs normally; after a fault occurs, impedance is calculated, and the fault position is determined; when an upstream fault occurs, entering a low-voltage protection mode, and limiting a non-fault phase-to-ground voltage through a phase shifter winding; and when a downstream fault occurs, entering a fault current limiting mode, and compensating voltage and absorbing power through a phase shifter winding so as to limit fault phase current and maintain non-fault phase voltage. According to the invention, the functions of voltage stabilization during normal operation of the phase shifter, low-voltage protection during abrupt drop of upstream voltage and current limiting during a downstream short-circuit fault can be realized.

The invention relates to the technical field of energy chemical industry and coal conversion, and discloses a multi-nozzle opposed coal gasification and isothermal transformation coupling method which comprises the following steps: step 1, firstly, executing a multi-nozzle opposed coal gasification process, and mixing pulverized coal with the particle size of less than or equal to 0.1 mm with water according to a mass ratio of 1: (1.8-2.2) to prepare coal water slurry; through the coupling design of hedging impinging stream gasification and U-shaped pipe isothermal transformation, the carbon conversion rate and the CO conversion stability are greatly improved, and the service life of core equipment is prolonged. In the gasification stage, 4-6 opposed burners inject coal water slurry and oxygen into the gasification furnace to form a hedging impinging stream reaction zone, the mixing uniformity is improved to 95% or above, the high temperature of 1400-1600 DEG C and the high pressure of 6.0-7.5 MPa are matched, the carbon conversion rate breaks through 98%, and the residual carbon loss is reduced by 60%; meanwhile, the cooling water amount is adjusted through CO content feedback at an outlet, the CO conversion rate is stabilized at 98.5% or above, the service life of the catalyst is prolonged to 3-4 years, and the replacement frequency is reduced by 60%.

The invention relates to the technical field of oil and gas engineering, and discloses an oil and gas yield planning-based reserve storage and production ratio prediction method, device, equipment and medium, which are used for respectively performing unit conversion, correction and addition on planned oil yield and planned gas yield of each oil and gas field of an enterprise in continuous multiple years. And obtaining the net planned oil and gas yield equivalent of each oil and gas field in each year. And according to the net planned oil and gas yield equivalent of each oil and gas field in each year, the remaining technical recoverable reserves of the enterprise in the year and the net planned oil and gas yield equivalent of the enterprise in the year are determined. And multiplying the remaining technical recoverable reserves of the enterprise in the year by a set economic conversion rate to obtain the remaining economic recoverable reserves of the enterprise in the year. And determining the ratio of the remaining economic recoverable reserves of the enterprise in the year to the net planned oil and gas yield equivalent as the reserve storage and production ratio of the enterprise in the year. The method can effectively reduce the workload, and improves the reserve storage and production ratio prediction efficiency.

The present application relates to the technical field of power test equipment, and discloses a diesel generator set testing device and a control method, wherein the diesel generator set testing device is composed of a three-winding dry-type transformer containing taps, a double-winding transformer, a single bus suitable for multiple voltage grades and its power distribution device, and 10.5kV medium-voltage resistive, inductive and capacitive loads, has four kinds of transformation ratios, and thus can transform the output voltages of diesel generators with different voltages to 10.5kV voltage side through the transformer to perform resistive, inductive and capacitive load tests, reduces the need for different voltage loads of equipment and investment for testing diesel generators with different voltages, has good compatibility, significantly improves the utilization efficiency and economy of the testing device, the transformer adopts Yyyn0 connection group, guarantees the authenticity of harmonics in the test, is beneficial to reflecting the test performance and actual operation condition of the diesel generator, and the safety control automation degree of the testing device is high, effectively preventing operation safety risks.

The invention discloses a resonant multi-transformation-ratio switched capacitor converter and a control method, and belongs to the technical field of converters. The invention aims to solve the problem of how to design a circuit topology design for improving the efficiency and the power density of the resonant switched capacitor converter. Soft switching of all switching devices is achieved through resonance, high working efficiency and power density are guaranteed, the converter works in an uncontrolled mode, the converter can achieve the designed three different transformation ratios through reasonable design of the switching time sequence of all the switching devices in the converter, and the converter can be applied to the field of power conversion. And relatively high efficiency can be ensured under the working conditions of different transformation ratios. According to the invention, each switching device can realize ZCS soft switching.

The application provides a kind of based on hydrocarbon generation kinetics of source rock original total organic carbon parameter recovery and evaluation method.The method realizes the recovery of residual oil amount by light and heavy hydrocarbon correction, and with the kinetic parameters such as dry kerogen hydrocarbon conversion rate, oil cracking conversion rate and coke generation proportion calibrated by thermal simulation experiment as the constraint, builds the evaluation model of intra-source cracking oil and its material balance formula, restores and evaluates the original S2, intra-source cracking oil amount, coke carbon content and original total organic carbon, and further reveals the mechanism of total organic carbon evolution of first decrease and then increase.This application provides a complete closed-loop framework from experimental calibration to geological parameter recovery, which significantly improves the geological reliability of hydrocarbon source rock resource evaluation.The method overcomes the limitations of traditional methods in the interpretation of total organic carbon evolution in high mature area, improves the accuracy of residual oil amount recovery, and provides a scientific, repeatable and reviewable technical path for hydrocarbon source rock resource evaluation.

The invention relates to the technical field of transformation ratio direction compensation, and discloses a voltage transformer transformation ratio direction compensation method, device and equipment and a storage medium, and the method comprises the steps: collecting a first voltage signal of a primary side of a voltage transformer and a second voltage signal of a secondary side of the voltage transformer; determining a cross correlation coefficient and a transformation ratio error based on the first voltage signal and the second voltage signal; determining a phase difference according to the cross correlation coefficient; and performing transformation ratio direction compensation on the voltage transformer according to the transformation ratio error and the phase difference, the transformation ratio direction compensation at least comprising transformation ratio compensation, phase compensation and direction compensation, and realizing the transformation ratio direction compensation on the voltage transformer by combining the transformation ratio compensation, the phase compensation and the direction compensation. And the compensation efficiency and accuracy are effectively improved.

The utility model discloses a portable high-protection transformer transformation ratio tester, which relates to the technical field of transformer transformation ratio testing, and comprises a storage box, a box cover is mounted on the top surface of the storage box, a transformation ratio tester body is mounted in the storage box, a fixed cylinder is fixedly mounted in the middle of the bottom surface of the storage box, and the fixed cylinder is fixedly mounted on the bottom surface of the storage box. A telescopic pull rod is slidably installed in one side of the fixing cylinder, the storage box is matched with the box cover to store the transformation ratio tester body, when the transformation ratio tester body needs to be carried to test a transformer, the telescopic pull rod in the fixing cylinder is pulled out, the storage box is controlled to incline through the pulled-out pull rod, and the transformation ratio tester body is placed in the storage box. According to the transformation ratio tester disclosed by the invention, the two moving wheels mounted on one side of the bottom surface of the storage box are in contact with the ground, so that the transformation ratio tester body is convenient to carry under the cooperation of the telescopic pull rod and the two moving wheels, the transformation ratio tester body does not need to be carried by hands, and the comfort of the hands of a worker is improved.

A converter converts a DC input voltage into a DC output voltage. The converter includes: a regulator unit coupled to a power unit. The power unit has: a first converter stage, with two input connections; a second converter stage, which is connected to the first converter stage; and a third converter stage, which is connected to the second converter stages and has two output connections. The first, second, and third converter stages are adapted so that, when the DC input voltage is applied, the DC output voltage is supplied during operation of the converter. An actual transformation ratio of the power unit is defined: by a ratio between the DC input voltage and the DC output voltage, or by a ratio between an input current and an output current. The regulator unit acts on the power unit such that the actual transformation ratio is matched to a predetermined transformation ratio.

The invention relates to a transformation ratio detection method for a low-voltage spike pulse type mutual inductor. The method comprises the following steps: S1, obtaining the representation of the transformation ratio N of the mutual inductor based on five basic parameters; s2, obtaining five basic parameters of the transformation ratio N of the mutual inductor; and S3, obtaining a basic parameter calculation formula of the transformation ratio N of the transformer. According to the invention, a transformer transformation ratio detection technology of a transformer substation current transformer and a transformer substation voltage transformer is deduced by virtue of low-voltage direct current in a human body bearing range for the first time; the current situations that the transformation ratio detection is high in personal risk, expensive in equipment, heavy in weight and easy to damage are changed, so that the field transformation ratio detection work becomes simple and convenient without personal risk; the current situation that transformer substation mutual inductor acceptance equipment assets are heavy at present is changed, and reference is provided for transformation of a traditional on-site acceptance process to lean, scientific and technical and high-end.

This application relates to a method for decoupling the primary-secondary pyrolysis hydrocarbon generation conversion rate of organic matter based on a gold tube hydrocarbon generation thermal simulation experiment. The method includes the following steps: Step 1, acquiring thermal simulation data of kerogen gold tube hydrocarbon generation; Step 2, parametric modeling of the kerogen hydrocarbon generation process; Step 3, constructing a least-squares objective model under multiple constraints; Step 4, nonlinear least-squares optimization solution under constraints; and Step 5, calculating the hydrocarbon generation conversion rate. By calculating the conversion rate of the cumulative amounts of each decoupled hydrocarbon generation process, this invention can obtain the evolution law of conversion rate changes with maturity for processes such as kerogen oil generation, gas generation, and crude oil pyrolysis into gas and non-reactive carbon formation during crude oil pyrolysis, providing a quantitative basis for refined hydrocarbon generation evaluation.

The invention discloses a method for accurately calculating circulating current during parallel operation of transformers, which comprises the following steps of: 1, when the current transformation ratios of two transformers are not equal, generating circulating current between secondary windings under the action of electromotive force difference between the secondary windings; 2, when the secondary winding generates circulating current, the primary winding also generates circulating current, and an induced electromotive force expression of the primary winding is obtained; 3, obtaining a secondary winding induced electromotive force expression according to the primary winding induced electromotive force expression, and obtaining a power grid voltage calculation formula of the transformer parallel common node according to the secondary winding induced electromotive force difference expression; and 4, substituting the bus voltage of the superior power supply substation and the reactance of the line between the parallel common nodes of the two transformers into the power grid voltage calculation formula, and calculating the circulating current during parallel operation and the relation between the accurate value of the circulating current and the bus voltage of the superior power supply substation and the transformation ratio of the two transformers. The stability and reliability of the power system can be improved.

This invention discloses a method for identifying the transformer ratio of energy meters in low-voltage distribution transformer areas based on particle swarm optimization (PSO) algorithm, relating to the field of power system metering technology. The method includes: given that a predetermined number of three-phase user energy meters in the transformer area require transformer ratio correction, dividing the transformer area operation dataset into a training set for model training and a validation set for verification; defining the variables to be solved as the user identities requiring correction and their corresponding correct transformer ratio parameters; constructing a single comprehensive evaluation function to evaluate the correction effect of any given user identity and transformer ratio combination by integrating multiple transformer area operation features; employing a swarm intelligence optimization algorithm, using the user identity and transformer ratio combination as optimization variables and the comprehensive evaluation function as the optimization objective, and searching in the solution space by simulating swarm iterative optimization behavior; and outputting the globally optimal solution obtained by the search when the swarm intelligence optimization algorithm meets a preset convergence condition.