Abstract: A method and device for a pumping start test for a pumped storage engine, and an apparatus are disclosed. The method includes: obtaining a switch state of guide vanes of the pumped storage engine; controlling the pumping start of the engine to enter a first stage according to the switch state of the guide vanes, and obtaining parameters related to the first stage, to determine a first-stage test result; controlling the pumping start of the engine to enter a second stage according to the first-stage test result, and obtaining parameters related to the second stage, to determine a second-stage test result; controlling the pumping start of the engine to enter a third stage according to the second-stage test result, and obtaining parameters related to the third stage to determine a final test result. The first stage, the second stage and the third stage correspond to different speeds of the engine.

Abstract: A dynamic-balance test method for a rigid rotor includes: acquiring a counterweight influence coefficient library, initial vibration swing data and an initial vibration vector; determining an initial test weight mass and an initial test weight phase according to the initial vibration swing data and the counterweight influence coefficient library, and triggering a speed increase test according to the initial test weight mass and the initial test weight phase to obtain a target vibration vector; determining a target configuration influence coefficient according to the initial vibration vector, the target vibration vector and the initial test weight mass; calculating a residual vibration swing value; and determining a target test weight adjustment scheme according to the residual vibration swing value, a rotor operation vibration standard, a target test weight mass and a target test weight phase.

Abstract: A method of synchronization test of a generator set outlet switch apparatus includes that: prior to a synchronization grid-connected closing of an outlet switch apparatus of a target generator set, a wiring phase sequence of a synchronization apparatus is determined to be correct; then three-phase closings of the outlet switch apparatus are determined to be synchronous; two-side voltage waveform data at a closing moment of the outlet switch apparatus is measured and recorded; and a simulated synchronization closing quality coefficient of the outlet switch apparatus of the target generator set is determined according to the two-side voltage waveform data, and a synchronization closing performance of the outlet switch apparatus of the target generator set is evaluated according to the simulated synchronization closing quality coefficient.

Abstract: A dynamic-balance test method for a rigid rotor includes: acquiring a counterweight influence coefficient library, initial vibration swing data and an initial vibration vector; determining an initial test weight mass and an initial test weight phase according to the initial vibration swing data and the counterweight influence coefficient library, and triggering a speed increase test according to the initial test weight mass and the initial test weight phase to obtain a target vibration vector; determining a target configuration influence coefficient according to the initial vibration vector, the target vibration vector and the initial test weight mass; calculating a residual vibration swing value; and determining a target test weight adjustment scheme according to the residual vibration swing value, a rotor operation vibration standard, a target test weight mass and a target test weight phase.

Abstract: A method of synchronization test of a generator set outlet switch apparatus includes that: prior to a synchronization grid-connected closing of an outlet switch apparatus of a target generator set, a wiring phase sequence of a synchronization apparatus is determined to be correct; then three-phase closings of the outlet switch apparatus are determined to be synchronous; two-side voltage waveform data at a closing moment of the outlet switch apparatus is measured and recorded; and a simulated synchronization closing quality coefficient of the outlet switch apparatus of the target generator set is determined according to the two-side voltage waveform data, and a synchronization closing performance of the outlet switch apparatus of the target generator set is evaluated according to the simulated synchronization closing quality coefficient.

Abstract: A method and device for a load rejection test for a pumped storage group, an apparatus and a medium. The method includes: determining a probability distribution model of at least one known random variable corresponding to a target pumped storage group, and determining an origin moment of the target random variable based on each probability distribution model; determining semi-invariants of the target random variable based on the origin moment of the target random variable; determining a probability density function of the target random variable based on the semi-invariants, and determining an overall offset risk value of the target random variable; determining an objective function based on the overall offset risk value, and determining a combination of target decision contents in the load rejection test for the target pumped storage group, so as to perform the load rejection test on the target pumped storage group.

Abstract: A method and device for a pumping start test for a pumped storage engine, and an apparatus are disclosed. The method includes: obtaining a switch state of guide vanes of the pumped storage engine; controlling the pumping start of the engine to enter a first stage according to the switch state of the guide vanes, and obtaining parameters related to the first stage, to determine a first-stage test result; controlling the pumping start of the engine to enter a second stage according to the first-stage test result, and obtaining parameters related to the second stage, to determine a second-stage test result; controlling the pumping start of the engine to enter a third stage according to the second-stage test result, and obtaining parameters related to the third stage to determine a final test result. The first stage, the second stage and the third stage correspond to different speeds of the engine.

Abstract: Provided is a method for determining insulation thermomechanical deterioration of a VPI wire rod of a pumped storage power generator motor. The method includes: periodically performing a cold-heat cycling test on a wire rod, and performing an insulation dielectric dissipation factor testing and a result interpretation of the insulation dielectric dissipation factor testing before and after each period to obtain corresponding data; in response to determining the interpretation result as the data being qualified, continuing to perform the cold-heat cycling test; and in response to determining the interpretation result as the data being unqualified, striking the wire rod with a copper hammer, and using an acoustic acquisition and analysis system to perform signal processing to determine spectral characteristics in a thermomechanical deterioration state as a deterioration criterion.

Abstract: Provided is a method for determining insulation thermomechanical deterioration of a VPI wire rod of a pumped storage power generator motor. The method includes: periodically performing a cold-heat cycling test on a wire rod, and performing an insulation dielectric dissipation factor testing and a result interpretation of the insulation dielectric dissipation factor testing before and after each period to obtain corresponding data; in response to determining the interpretation result as the data being qualified, continuing to perform the cold-heat cycling test; and in response to determining the interpretation result as the data being unqualified, striking the wire rod with a copper hammer, and using an acoustic acquisition and analysis system to perform signal processing to determine spectral characteristics in a thermomechanical deterioration state as a deterioration criterion.

Abstract: A DNA amplification approach, enabling the amplification of DNA targets with unknown sequences, involves successive PCR steps. In a first reaction, linear amplification of the target nucleic acid is achieved using one or more specially designed primers. In the second reaction, additional primers are added and exponential amplification of a double stranded DNA is achieved. Combined with conventional DNA sequencing procedures, this approach can be used for the direct sequencing of genomic DNA, avoiding the need to sub-clone large fragments. With the inventive method, moreover, sequencing information can be gathered in a much less costly and labor-intensive manner than was possible previously.