12 results about "Transient mode" patented technology

The invention relates to the technical field of transformer substation monitoring, and discloses a power supply and distribution safety monitoring method and system for a transformer substation. The method comprises the following steps: acquiring various data in a transformer substation, and performing time synchronization calibration on the three types of data; dividing a power supply and distribution operation mode into a steady-state mode, a transient mode and an overload mode based on the calibrated data, extracting a harmonic distortion rate, a dielectric loss angle tangent value and a vibration spectrum entropy value of a current waveform in each mode, and generating an operation characteristic matrix; detecting an operation mode switching event, and calculating a characteristic offset between modes; decomposing a degradation characteristic component in the operation characteristic matrix according to a matching degree between an insulation aging stage and current dielectric loss data in a historical fault case library; coupling compensation correction is performed on the degradation characteristic component in combination with the cross influence relationship between the electrical parameters and the mechanical parameters of the equipment; and reversely tracing the abnormal signal source equipment node along the topological structure of the power supply and distribution network based on the corrected degradation characteristic component, and outputting an equipment maintenance sequence.

The application relates to the technical field of vehicles, in particular to a test method and device of an electric drive system, electronic equipment and a storage medium, wherein the method comprises the following steps: obtaining an electric drive test requirement of a to-be-tested electric drive system; controlling a load simulator, an environment simulator, a simulated charging pile and a battery simulator to provide at least one test state for the to-be-tested electric drive system according to the electric drive test requirement; obtaining test information output by the to-be-tested electric drive system in the corresponding test state, so as to generate a test result according to the test information. Thus, the problem of single test dimension and insufficient dynamic performance evaluation in the electric drive boost charging test method is solved, the real complex working condition is reproduced by synchronously applying electrical, thermal and control multi-dimensional stress, the dynamic response capability and control robustness of the system are quantitatively evaluated through step disturbance and transient mode switching, and the fault detection rate and the research and development efficiency are improved.

A method for training an operator of a spray drying plant is disclosed, the spray drying plant comprising a plurality of plant elements, the plurality of plant elements comprising a pre-treatment element, a spray drying element, a post-treatment element, a powder recovery element and a programmable logic controller (PLC). The method comprises the steps of: obtaining a transient mode of the spray drying plant, wherein the transient mode comprises a transient sub-mode of the plurality of plant elements; repeatedly calculating simulated sensor data using a processing unit based on the obtained transient mode; displaying a training human-machine interface (tHMI) on a display, the training human-machine interface being configured to communicate with the transient mode of the spray drying plant and display simulated sensor data and control data of the transient mode; and updating the transient mode based on operator input on the tHMI for controlling the transient mode of the spray drying plant.

A digital filter includes a delay line; coefficients coupled to the delay line; and a summer coupled to at least one of the of coefficients, wherein the coefficients each include a first value during a normal mode of operation, and wherein at least one of the coefficients comprises a second value during a transient mode of operation.

The invention discloses a control method for transient correction of an engine, relates to the field of engine control, and solves the technical problems that the environment is polluted by exhaust gas and the service life of engine oil is influenced by dilution of the engine oil in an existing post-injection transient correction strategy. The method comprises the steps that a transient mode rotating speed difference threshold value, a transient mode rotating speed change rate threshold value and a transient trigger requirement are set, the rotating speed difference and the rotating speed change rate of an engine are obtained, and a first transient trigger condition is set according to the transient mode rotating speed difference threshold value and the rotating speed difference; setting a second transient trigger condition according to the transient mode rotating speed change rate threshold and the rotating speed change rate, judging whether the first transient trigger condition and the second transient trigger condition meet the transient trigger requirement or not, and if yes, entering the transient mode. The transient capacity of the engine is optimized, and white smoke and pollution are reduced.

The invention discloses a circulating current transient suppression method based on output voltage reconstruction, relates to the technical field of flexible control of a distributed power generation system, and solves the problems of voltage control and circulating current suppression coupling, poor transient mode adaptability, difficulty in considering multi-type circulating current suppression and the like in the existing parallel connection of multiple groups of converters. Specifically, on the premise that an output voltage reference instruction of the converter is not directly modified, various types of circulating current problems caused by control parameter deviation, phase asynchronization or circuit parameter mismatch can be effectively suppressed, so that a circulating current suppression process and an output voltage control process are decoupled, the system design is simplified, and the system reliability is improved. And the overall operation efficiency is improved, safe and reliable operation of the multi-converter parallel system in various working modes is ensured, and the method has high practical value and wide application prospects.

The invention relates to the field of audio recognition and processing, in particular to a game voice noise reduction and enhancement method based on AI voiceprint analysis, which comprises the following steps: firstly, decoupling audio data into two groups of orthogonal feature streams, and carrying out parallel calculation on spectrum features for neural network input and trigger features for state judgment; and then, switching between a steady-state self-adaption mode and a transient locking mode according to the spectral flux change rate and the envelope saturation by utilizing a finite-state machine containing asymmetric hysteresis logic. In the steady-state mode, the system updates the dynamic background noise model in real time to execute denoising standardization; and in the transient mode, freezing statistic update and inhibiting high-frequency clipping distortion through a nonlinear gain function. And finally, coding the state flag into a priori gating signal, and injecting the priori gating signal into a neural network attention layer. According to the method, pollution of burst high-energy signals to a background model is effectively prevented, mistaken truncation of long-tail reverberation is avoided, and speech enhancement robustness and response speed in a complex acoustic environment are remarkably improved.

The present application belongs to the technical field of reactive power compensation, and particularly relates to a new energy station dynamic reactive power compensation device voltage control method, system equipment and medium. In view of the deficiency of the existing new energy station dynamic reactive power compensation device repeatedly switching between the steady-state AVC control mode and the transient emergency voltage support mode, the present application adopts the following technical scheme: the new energy station dynamic reactive power compensation device voltage control method comprises: when the emergency voltage support action or the system fault is cleared, and the actual voltage of the new energy station grid-connected point returns to the normal range, a time delay is first performed, during the time delay period, the dynamic reactive power compensation device adopts voltage closed-loop control, after the time delay is over, the dynamic reactive power compensation device maintains the current reactive power unchanged, until a new AVC reactive power regulation instruction is received, the steady-state AVC control is accepted, and the steady-state mode is entered. The present application has the beneficial effect of avoiding the oscillation problem caused by repeatedly entering and exiting the transient mode in a short time.

The invention relates to the technical field of industrial equipment state monitoring and data processing, and discloses a multi-parameter fusion triggered steam turbine generator unit vibration data recording method, which comprises the following steps: automatically judging whether a unit operates in a working condition steady state or transient state mode according to a macroscopic parameter fluctuation ratio; in the steady-state mode, monitoring is performed by comparing the structural difference between the real-time reference correlation matrix and the dynamic reference correlation matrix; in the transient mode, monitoring is carried out by matching the morphological difference between the real-time parameter track and the standardized template, and data recording is triggered when any monitored difference value exceeds the limit. Therefore, the method can automatically adapt to baseline drift generated by normal aging of the unit so as to avoid false alarm, and at the same time, for multi-parameter cooperative relationship disintegration caused by early failure, high sensitivity is shown so as to avoid missing alarm.

This invention discloses a control method for a hybrid vehicle, a hybrid vehicle, and a computer-readable storage medium. The method includes: when the vehicle needs to switch from a current preset driving mode to a first target driving mode, determining a target transient mode based on the preset driving mode and the first target driving mode; controlling the vehicle to switch from the preset driving mode to the target transient mode; and after switching to the target transient mode, controlling the vehicle to switch back to the first target driving mode when the target transition completion condition corresponding to the target transient mode is met. This invention introduces a transient mode during the driving mode switching process of a hybrid vehicle, enabling a smoother transition between different driving modes, effectively solving the problems of uneven power switching and delays that may occur during driving mode switching, and improving the safety and stability of the vehicle.

The invention discloses a multi-modal analysis method, system, medium and equipment for the synchronization stability of a converter, and belongs to the technical field of stability analysis of an electric power system.The method comprises the steps that a second-order motion equation is built based on converter-power grid coupling parameters; according to comparison of power grid impedance and a critical value, a d-axis current state during a fault and an equivalent power angle relation before and after the fault, the transient mode is divided into three types: the first type is that the impedance is smaller than the critical value and the power angle after the fault is larger than the power angle before the fault, the second type is that the impedance is smaller than the critical value and the power angle after the fault is smaller than the power angle before the fault, and the third type is that the impedance is larger than or equal to the critical value; and if not, calculating the acceleration area, the deceleration area and the equivalent damping power integral value of the first period after the fault, and outputting a stability result in combination with the area comparison condition of the mode type and the positive and negative integral values. By implementing the method, the problem of inaccurate judgment of the instability boundary condition due to the fact that the fault mode is not distinguished in the synchronous stability analysis of the converter in the prior art can be solved.

The ANSYS-based evaluation method for the radiation immunity simulation of the avionics equipment comprises the following steps: respectively importing models of a circuit board PCB and a case into a test platform HFSS, and matching file formats of the circuit board PCB and the case with the test platform HFSS; the method comprises the following steps: editing 3D Components of a circuit board PCB in a test platform HFSS, selecting the position of a signal port in a Transient mode of the test platform, establishing a rectangular geometric surface at the position, selecting the geometric surface, setting a port mode of the circuit board PCB as a Lumped mode, setting port impedance as 50 ohm, setting a port at the other end of the circuit board PCB, and determining a sensitive circuit of a product; the electric field radiation excitation of the test platform HFSS is set, the simulation system is started to obtain the final simulation result of the sensitive circuit and interference of the product, whether the product is qualified or not is determined according to the final simulation result, and the performance evaluation efficiency is improved.