8 results about "Oscillation test" patented technology

The invention discloses a broadband oscillation test system and test method for a converter, and relates to the technical field of electrical equipment testing, and the system comprises an equipment configuration and access module, a test mode switching module, a test operation and data acquisition module, a data automatic analysis module and a test report generation module. By constructing a closed hardware test loop, the comprehensiveness of the broadband oscillation test of the converter is improved, in a data analysis link, a broadband oscillation characteristic frequency identification formula is introduced, a time domain signal is converted into a frequency domain signal through fast Fourier transform, the broadband oscillation characteristic frequency is obtained, and meanwhile, through an oscillation amplitude normalization formula, the frequency domain signal is converted into the frequency domain signal to obtain the broadband oscillation characteristic frequency. According to the method, the oscillation amplitude after normalization is obtained, the dimensional difference under different working conditions is eliminated, in addition, a system impedance matching degree formula and a stability comprehensive evaluation index formula quantify the stability from the aspect of impedance matching and multi-parameter comprehensive evaluation, and the whole process from feature extraction to risk evaluation is covered.

The invention discloses an online evaluation method and system for an oscillation monitoring algorithm, and the method comprises the steps: obtaining diversified oscillation test cases, and marking the oscillation characteristics of each case; the method comprises the following steps: configuring a test plant station in an actually running power system, adopting a high-precision sending mechanism by the test plant station, generating an analog data message consistent with a time mark and a format of an actual PMU message according to an oscillation test case, and sending the analog data message to a message bus; and performing oscillation detection on the analog data message received by the message bus by applying an oscillation monitoring algorithm, and comparing an oscillation detection result with the oscillation characteristics of the corresponding oscillation test case to obtain an evaluation result of the oscillation monitoring algorithm. The method can truly reflect the performance of the oscillation monitoring algorithm in an actual environment without influencing the actual operation of a power grid, improves the accuracy and reliability of the algorithm, has the advantages of high authenticity, high reliability and comprehensive coverage, and is suitable for online evaluation and optimization of the oscillation monitoring algorithm of the power system.

The utility model discloses a terminal anti -swing test seat, including upper insulating seat, lower insulating seat and conductive terminal structure, the upper end surface of lower insulating seat is provided with the accommodation groove, the conductive terminal structure includes the action terminal and static terminal of setting in the accommodation groove, the one end of action terminal and static terminal elastic abutment, the lower end of upper insulating seat is provided with the anti -swing structure, and the anti -swing structure is used for action terminal horizontal limit, the bottom of accommodation groove is provided with terminal action groove, in the utility model, through setting the anti -swing structure in the lower end of upper insulating seat, can be in horizontal direction to action terminal horizontal limit, reduce the horizontal deviation of action terminal, thereby reduce the influence of the assembly precision of action terminal to its deformation amount in the test state, avoid action terminal after the probe insertion of test probe and cause the excessive deformation and lead to the original state of being unable to restore.

The application provides a tilting and rolling test device and a control method of the tilting and rolling test device. The tilting and rolling test device is used for providing a rolling platform for a ship model fixed on the tilting and rolling test device to simulate the rocking of a ship under the action of sea waves. The tilting and rolling test device comprises a controller, a base, a hydraulic actuator assembly and a rolling support. The base is fixed on the ground or a pre-buried base. The base and the rolling support are rotationally connected. The hydraulic actuator assembly comprises a hydraulic oil circuit system and an actuator driven by the hydraulic oil circuit system. The hydraulic oil circuit system is controlled by the controller, and the actuator is fixedly connected with the rolling support. The hydraulic oil circuit system is used for driving the actuator to move in a horizontal direction under the control of the controller, and driving the rolling support to tilt or roll through the actuator. The tilting and rolling test device and the control method of the tilting and rolling test device can accurately simulate the rocking of a ship to guide the design of the ship.

The invention provides dust collector floor brush swing testing equipment and a using method thereof, and relates to the technical field of dust collector floor brush swing testing. The device comprises a supporting frame and detection equipment, the upper end of the detection equipment is fixedly connected with a display, the side surface of the supporting frame is fixedly connected with a swing table, the inner side surface of the supporting frame is provided with a movable plate, and the lower side surface, close to the swing table, of the movable plate is fixedly connected with a supporting rod; the supporting rod is rotationally connected to the inner side surface of the supporting frame. When an arc-shaped plate in the swinging device moves through the radian of the arc-shaped plate, an adjusting block gradually gets away from the joint of a rolling brush head and a first connecting block, so that a second spring pulls a connecting roller, and the action of pulling the rolling brush head during manual use is simulated; and the adjusting device is arranged to provide pressure for the connecting roller to simulate the action of manually pushing the rolling brush head for testing, so that the testing accuracy is improved, and more real and reliable data are provided.

The utility model discloses a kind of experimental constant-temperature oscillation test tube fixing frame, it is related to experimental equipment technical field, including: two clamps one, for parallel arrangement, its upper and lower are uniformly provided with notched; clamp two, between two described clamps one, it is elastically slidably arranged, it is also provided with described notched on it, the notched on the clamp one and the notched lateral wall on the clamp two form test tube clamping area;The test tube in this scheme is placed, will not directly fall into the bottom of clamping area, can be first fallen on step, after transverse moving clamp two, can make test tube reach the bottom, by twice operation, reduce the speed of test tube falling, avoid test tube because of rapid falling and the violent collision of clamping area bottom, effectively protect test tube from being damaged, only need to insert test tube into the notched of clamp one in upper side during use, it is simple and quick to operate.

The utility model relates to the technical field of automobile accessory detection, disclose gear shift fork oscillation test frock, including shift fork foot, flat plate and shift fork foot support, one end of shift fork foot is equipped with the crash component, the outside of shift fork foot is equipped with fixed component, the crash component includes recessed groove, recessed groove fixed connection one end at shift fork foot, the outside fixed connection of shift fork foot support has convex groove, the inside setting of convex groove is at recessed groove, fixed component includes piston connection, piston connection fixed connection one end at shift fork foot, the inside setting of piston connection has connecting rod. In the utility model, gear shift fork oscillation test frock, simulate the durability test of gearbox actual gear shifting condition, after the appearance inspection and the analysis result of cutting inspection weld after the test, prevent batch welding to be bad to flow out, prevent the automobile gear shifting failure from being recalled due to the welding problem.

This invention provides a voltage-excited method, apparatus, and system for testing the oscillation of wind turbine generators. The voltage-excited method includes: controlling a power converter in a grid-connected testing device to generate a voltage excitation signal to the wind turbine generator; acquiring generator speed vectors within the disturbance frequency range of the wind turbine generator; determining speed deviation indices at each disturbance frequency based on the generator speed vectors at each disturbance frequency; and determining the target oscillation mode frequency of the wind turbine generator based on comparisons between the speed deviation indices at each disturbance frequency and preset thresholds, and comparisons between the speed deviation indices at the corresponding previous disturbance frequency and preset thresholds. This invention can quickly and effectively identify the oscillation modes of wind turbine generators, significantly improving testing efficiency and reducing testing costs.