45results about How to "In line with the actual operating conditions" patented technology

The invention discloses a method for identifying parameters of synchronous wind-driven generators on the basis of an improved particle swarm optimization algorithm. The method has the advantages that selection genetic operation, crossover genetic operation and mutation genetic operation are carried out on the basis of the particle swarm optimization algorithm, so that the global search capacity and the local search capacity of the particle swarm algorithm can be improved, and the convergence speed of the particle swarm algorithm can be increased; measured data are directly acquired via a control center, so that the parameters of the synchronous wind-driven generators can be identified in an online manner, an existing method for identifying parameters of wind-driven generators in an offline manner under the condition of machine halt is changed, and normal running of the synchronous wind-driven generators is unaffected; the identified parameters effectively conform to actual running conditions of the synchronous wind-driven generators, and accordingly steady states, dynamic states and transient characteristics of the synchronous wind-driven generators can be effectively reflected.

The invention discloses an air conditioner heating operation control method. The method comprises the steps that the actual heating capacity of air conditioner operation and the actual temperature change of a room where an air conditioner is located in a set time period are obtained; the reference temperature change corresponding to the actual heating capacity is determined according to the actual heating capacity; a target parameter is determined according to the comparison result between the actual temperature change and the reference temperature change corresponding to the actual heating capacity, and the air conditioner is controlled to operate according to the target parameter; and the actual heating capacity is determined according to real-time compressor frequency, the real-time indoor temperature, the real-time outdoor temperature, the real-time indoor unit rotation speed, the real-time outdoor unit rotation speed and the real-time operation power. By the application of the air conditioner heating operation control method, control performance of the air conditioner can be improved.

The invention discloses a cophase power supply system flow controller dynamic reliability evaluating method. The influence of the actual traction load randomness and impact on the junction temperature fluctuation of a power element is taken into account. Power loss and a thermal network model are used to calculate the junction temperature of the power element. A physical model based on a failure mechanism and a linear fatigue damage cumulative model are combined to calculate the power module failure rate of a flow controller. The PFC reliability is analyzed by using a dynamic reliability assessment method which takes into account the variation of the element failure rate. According to the invention, the redundancy of a power module is analyzed; the number of cascaded modules of the flow controller is optimized; and a necessary basis is provided for engineering design and operation maintenance of a cophase power supply system.

The invention discloses an elastic side bearing fatigue test device. The elastic side bearing fatigue test device comprises a side bearing seat, a base composition, a horizontally arranged connecting beam, a horizontal loading device and a vertical loading device, wherein the side bearing seat is used for placing a side bearing; the base composition is provided with a supporting table which supports the side bearing; one end of the connecting beam is fixedly connected to the side bearing while the other end of the connecting arm is hinged to a positioning pin; the positioning pin is fixedly arranged a positioning pin boss which is far from the base composition at a certain distance; the horizontal loading device is used for applying a horizontal load to the side bearing; and the vertical loading device is arranged on a side bearing wearing plate of the elastic side bearing for applying a vertical load to the elastic side bearing. According to the elastic side bearing fatigue test device and method, the actual applying work condition of the elastic side bearing can be simulated, so that the reliability of an elastic side bearing fatigue test result is improved.

The invention discloses an inversion device and a power control method thereof. The inversion device comprises a shell, a power module and a heat dissipation structure, the power module is arranged inthe shell and comprises a boosting power switch tube and an inversion power switch tube; the heat dissipation structure is arranged in the shell and comprises a draught fan, a boosting radiator and an inversion radiator; the draught fan supplies air in the first direction, and the boosting radiator and the inversion radiator are both arranged on the air outlet side of the fan and used for radiating heat for the boosting power switch tube and the inversion power switch tube respectively. The projections of the boosting radiator and the inversion radiator along the first direction are at leastpartially overlapped, and the boosting radiator is arranged closer to the fan than the inversion radiator along the air supply direction of the fan. According to the inversion device, the air supply air flow passing through the boosting radiator can still dissipate heat of the inversion radiator, and the inversion device can meet the larger heat dissipation requirement of an inversion power switchtube.

The invention discloses a method for formulating a vibration limit value of an aeronautical transmission system. The method comprises the following steps: 1) determining a life value of the aeronautical transmission system and an S-N curve of a material; 2) establishing a multi-flexible dynamic model of the aeronautical transmission system; 3) measuring vibration values of each shafting of the aeronautical transmission system under different working conditions and load conditions, and calculating dynamic stress and load of each shafting of the aeronautical transmission system along with time history; 4) compiling a load spectrum based on the load of each shafting of the aeronautical transmission system along with the time history; 5) calculating the service life of each shafting of the aeronautical transmission system under different working conditions and load conditions; 6) establishing a coupling relation between the vibration values and the service life of each shafting of the aeronautical transmission system under different working conditions and load conditions. According to the method for formulating the limit value through combination of simulation and tests, a large number of tests are avoided, and the cost of time, manpower, material resources and the like is saved.

The invention provides a nonuniform spraying device for a SCR cold-state mode experiment. The nonuniform spraying device is arranged in a flue gas and comprises multiple spraying subunits of a same structure, and each spraying subunit comprises a NOx / tracer gas diluting air inlet pipe, a support pipe communicated with the NOx / tracer gas diluting air inlet pipe, multiple nozzles arranged on the support pipe and a static mixing pipe arranged at a spout of each nozzle. The device can realize nonuniform spraying of NOx / tracer gas in the SCR cold-state mode experiment, so that experiment parameters are ensured to better meet actual running conditions, and accuracy and reliability of the cold mode experiment are improved. The invention further provides a spraying method based on the device.

The invention relates to a multi-step prediction method for early warning of overtemperature of the tube wall of the heating surface of an ultra-supercritical boiler, comprising: step 1, collecting training data in the training stage, and constructing a time series network model after preprocessing the collected training data And carry out offline training; step 2, collect the input data in the use stage as the input of the time series network model, and obtain the prediction result of the metal wall temperature data. The beneficial effects of the present invention are: the temperature of the tube wall on the heating surface can be predicted in advance, and guidance can be provided for over-temperature control; longer time-series characteristic information can be captured, and the prediction accuracy can be improved; by sinusoidal encoding of time, the transition of each day can be smoothed, It is more in line with the actual operating conditions; it can not only solve the problem that the sensor cannot work for a long time by direct measurement, but also realize the prediction of wall temperature at different positions; it can easily add the latest data and retrain the model, and has good anti-interference.

The invention discloses an optical fiber differential protection field simulation test system and method based on a Beidou system. The system consists of a line local side test unit and an opposite side test unit, and each test unit internally comprises a Beidou communication module, a data simulation module and a data interface module. The Beidou communication module receives a satellite time tick message to realize clock synchronization, and interacts test control information and a test result with the opposite side test unit through a short message; the data simulation module simulates testvirtual data required by a protection device according to the input system operation parameters; and the data interface module outputs test sampling analog quantity and switch position information tothe protection device and collects tripping information output by the protection device at the same time. According to the invention, the problem that there is no systematic debugging technology of line optical fiber differential protection in a transformer substation site at present can be solved to meet the requirements of power system users for field detection of line protection devices.

The present invention discloses a durability test method, device, equipment and storage medium of an electric vehicle drive motor, wherein the electric vehicle drive motor durability test method includes S10: controlling the drive motor to run according to a first set working condition, and correspondingly obtaining the the first operating parameter of the driving motor; S20: control the driving motor to operate according to the second set working condition, and correspondingly obtain the second operating parameter of the driving motor; and, S30: according to the first operating parameter and the The second operating parameter is to evaluate the drive motor according to the reliability evaluation method set in the set reliability test standard, wherein the first set working condition is set in the set reliability test standard fixed working conditions. In the technical solution provided by the present invention, by setting the first set working condition and the second set working condition, the test time can be extended, the test working condition complexity can be increased, and the qualified drive motor has stronger durability.

An online detection method for a refrigeration energy efficiency ratio and a refrigeration capacity of an air conditioner. The online detection method for a refrigeration energy efficiency ratio comprises: during the operational process of an air conditioner, acquiring a real-time compressor frequency, a real-time indoor temperature, a real-time outdoor temperature, a real-time inner machine rotation speed and a real-time outer machine rotation speed; determining a real-time core energy efficiency ratio corresponding to the real-time compressor frequency and the real-time indoor temperature according to a typical compressor frequency, a typical outdoor temperature, a typical core energy efficiency ratio and a typical relational expression; determining a real-time indoor temperature energy efficiency ratio correction factor according to the real-time indoor temperature and a rated indoor temperature, determining a real-time inner machine rotation speed energy efficiency ratio correction factor according to the real-time inner machine rotation speed and a rated inner machine rotation speed, and determining a real-time outer machine rotation speed energy efficiency ratio correction factor according to the real-time outer machine rotation speed and a rated outer machine rotation speed; and determining a real-time refrigeration energy efficiency ratio according to the real-time core energy efficiency ratio and each energy efficiency ratio correction factor. Thus, the real-time detection of a refrigeration energy efficiency ratio and a refrigeration capacity under different operational working conditions of an air conditioner can be achieved.

The invention discloses an air conditioner refrigeration running control method. The method includes the steps that the actual running refrigerating capacity of an air conditioner within a set time period and the actual temperature change of a room where the air conditioner is located are obtained; the reference temperature change corresponding to the actual refrigerating capacity is determined according to the actual refrigerating capacity and the corresponding relation between the known refrigerating capacity and reference temperature change; and target parameters are determined according to comparison results of the actual temperature change and the reference temperature change corresponding to the actual refrigerating capacity, and the air conditioner is controlled to run according to the target parameters. The actual refrigerating capacity is determined according to the real-time press frequency, the real-time indoor temperature, the real-time outdoor temperature, the real-time indoor unit rotating speed, the real-time outdoor unit rotating speed and the real-time running power. By means of the method, the control performance of the air conditioner can be improved.

The invention discloses a method for evaluating the dynamic reliability of a power flow controller of an in-phase power supply system. By taking into account the influence of the actual traction load randomness and impact on the fluctuation of the junction temperature of the power element, the power loss and the thermal network model are used to calculate the junction temperature of the power element. , combined with the physical model based on the failure mechanism and the linear fatigue damage accumulation model, the failure rate of the power module of the power flow controller is calculated, and the reliability of the PFC is analyzed by a dynamic reliability evaluation method that takes into account the change of the component failure rate. The invention analyzes the redundancy of the power modules, optimizes the number of cascaded modules of the power flow controller, and provides necessary basis for the engineering design and operation and maintenance of the same-phase power supply system.

The invention discloses a method applied to fusion reactor cladding accurate engineering design. The method comprises the following steps: firstly, performing plasma calculation to obtain anisotropicneutron source distribution and cladding first wall surface heat flux density distribution; combining anisotropic neutron source distribution obtained through plasma calculation in neutron transport physics calculation with material temperature distribution obtained through thermohydraulics calculation, and obtaining cladding core heat source distribution and cladding tritium propagation rate; obtaining material temperature distribution of different areas in the cladding by utilizing cladding first wall surface heat flux density distribution provided by plasma calculation and nuclear heat source distribution provided by neutron transport calculation in thermal hydraulics calculation; neutron transport calculation and thermal hydraulics calculation needing to be mutually iterated until therequirements of material temperature safe operation limitation and cladding tritium propagation rate are met. According to the method, engineering design can be carried out on the fusion reactor cladding in the real service environment of the cladding, the defect that in a traditional method, an isotropic neutron source and the surface heat flux of the first wall of the uniform cladding are adopted is overcome, and accurate engineering design of the cladding is achieved.

The invention discloses an inverter device and a power control method thereof. The inverter device includes: a casing, a power module and a heat dissipation structure; the power module is arranged in the casing and includes a boost power switch tube and an inverter Variable power switch tube; the heat dissipation structure is arranged in the housing and includes a fan, a boost radiator and an inverter radiator; the fan blows air along the first direction, and the boost radiator and inverter radiator Both are arranged on the air outlet side of the fan and are used to dissipate heat for the boost power switch tube and the inverter power switch tube respectively; the step-up radiator and the inverter radiator along the first direction The projections are at least partially overlapped, and along the blowing direction of the fan, the boost radiator is arranged closer to the fan than the boost radiator. The inverter device of the present invention can still dissipate heat to the inverter radiator through the air supply airflow passing through the booster radiator, and can adapt to the greater heat dissipation demand of the inverter power switch tube.

The invention discloses a partial discharge test system for a basin-type insulator epoxy insulating material, and the system comprises a test cavity which is internally provided with a ground electrode, and the ground electrode is internally provided with a heating device which is used for directly heating the ground electrode and indirectly heating the basin-type insulator epoxy insulating material and filling gas in the test cavity. A gradient temperature environment is formed by the ground electrode, the basin-type insulator epoxy insulating material and the filling gas; a high-voltage electrode is further arranged in the test cavity, one end of the high-voltage electrode is externally connected with a power source, the other end of the high-voltage electrode is connected with a basin-type insulator epoxy insulating material arranged on the ground electrode, and the high-voltage electrode and the ground electrode form an electrode assembly which is used for carrying out a partial discharge test on the basin-type insulator epoxy insulating material in a gradient temperature environment.

The present invention discloses a thermal shock test system for a transmission project outdoor galvanization fitting. The system comprises a fitting heating assembly and an ice water spraying assembly. The test fitting heating assembly comprises a voltage regulation power current transformer, a current transformer and a test fitting, and the test fitting heating assembly establishes a conductive communication line through a lead. The ice water spraying assembly includes an ice water tank, an inlet pipe, a shower pipe, an outlet pipe and a test water tank. The thermal shock test system and method for a transmission project outdoor galvanization fitting fully consider the influence of the heating mode and the cooling speed on the thermal fatigue properties of the transmission project outdoor galvanization fitting and provide a thermal shock test design rule through combination of the through-flow heating and the spraying ice water mixture cooling to more accord with the real operation condition of the transmission project outdoor galvanization fitting so as to effectively guide the development of the thermal fatigue property test of the transmission project outdoor galvanization fitting and the design of the through-flow fitting and prevent the through-flow fitting from cracking and damaging caused by continuous accumulation of the interior thermal stress in the extreme cold and hot alternating environment.