Method, device, medium and equipment for determining RSO test judgment criterion of rotor with brushless exciter

Abstract

The invention relates to an RSO test judgment criterion determination method and device for a rotor with a brushless exciter, a medium and equipment, and the method comprises the following steps: simulating the normal working conditions of a generator single rotor and a generator rotor with an exciter, and obtaining the test result of the normal working conditions; simulating a fault working condition of the generator rotor with the exciter, and obtaining a test result of the fault working condition; analyzing the test result of the fault working condition to obtain an analysis result of the fault working condition; and summarizing and sorting the test result of the normal working condition, the test result of the fault working condition and the analysis result of the fault working condition to obtain a judgment standard of the RSO test detection result implemented by the rotor with the three-machine brushless exciter. The evaluation standard provided by the invention is suitable for a new RSO test method of the generator rotor with the three brushless exciters in the nuclear power plant, the detection result of the new test method is effectively judged under the special condition that the excitation pair wheel is not released, and the overall evaluation of the insulation state of the generator rotor is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of generators, and more particularly to a method, device, medium and equipment for determining RSO test evaluation criteria for a brushless exciter rotor. Background Art

[0002] RSO (Repetitive Surge Oscillograph) is a new nondestructive testing method that is easy to use, highly sensitive, and accurate. It is suitable for analyzing metallic or non-metallic short-circuit faults between generator rotor turns and can detect potential rotor insulation failures at an early stage.

[0003] During a nuclear power plant unit shutdown and transition to maintenance, the maintenance program mandated the RSO test of the generator rotor windings to ensure the integrity of the interturn insulation. Due to the structure and connection method of the generator and excitation coil windings, the RSO test required the removal of the excitation sheave bolts and complete disconnection of the generator rotor windings from the exciter rotor windings. Therefore, during the overhaul equipment reinstallation phase, mechanical engineers were required to perform the excitation sheave centering, excitation sheave connection, and ferrying tests, significantly extending the critical path of the conventional island.

[0004] In order to improve work efficiency and reduce work risks, a new method has been developed for performing RSO testing on the rotor of a nuclear power plant generator with a three-machine brushless exciter without disengaging the excitation pulley. However, the original evaluation criteria are no longer applicable to the new measurement method. Therefore, it is necessary to develop an evaluation criterion that matches the new measurement method. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method, device, medium and equipment for determining the RSO test evaluation standard of a brushless exciter rotor in response to the problems existing in the prior art.

[0006] The technical solution adopted by the present invention to solve the technical problem is to construct a method for determining the RSO test evaluation standard of a brushless exciter rotor, comprising the following steps:

[0007] Simulate the normal operating conditions of a single generator rotor and a generator rotor with an exciter, and obtain test results under normal operating conditions;

[0008] Simulate the fault condition of the generator rotor with exciter and obtain the test results of the fault condition;

[0009] Analyzing the test results of the fault condition to obtain an analysis result of the fault condition;

[0010] Based on the test results of the normal working condition, the test results of the fault working condition and the analysis results of the fault working condition, the evaluation criteria for the RSO test results of the three-machine brushless exciter rotor are obtained.

[0011] In the method for determining the RSO test evaluation standard of a rotor with a brushless exciter according to the present invention, the normal operating conditions include: a state where the single rotor of the generator has no inter-turn short circuit and a state where the rotor of the generator with an exciter has no inter-turn short circuit;

[0012] The test results of the normal working condition include: the waveform of the generator single rotor without inter-turn short circuit and the waveform of the generator rotor with exciter without inter-turn short circuit.

[0013] In the method for determining the RSO test evaluation standard for a rotor with a brushless exciter according to the present invention, simulating the normal operating conditions of a single generator rotor and a generator rotor with an exciter and obtaining the test results of the normal operating conditions includes:

[0014] The test is conducted by simulating the state of a single-rotor generator without inter-turn short circuit to obtain the waveform of the state of a single-rotor generator without inter-turn short circuit;

[0015] The generator rotor with exciter is simulated for testing in the state without inter-turn short circuit, and the waveform of the generator rotor with exciter in the state without inter-turn short circuit is obtained.

[0016] In the RSO test evaluation standard determination method for a rotor with a brushless exciter described in the present invention, the fault conditions include: the generator rotor is equipped with an exciter, and the inter-turn short-circuit fault of each pole coil of the generator rotor occurs; the generator rotor is equipped with an exciter, and the insulation between the generator rotor turns has different short-circuit resistance faults; the generator rotor is equipped with an exciter, and the generator rotor turns have multiple-point inter-turn short-circuit faults; the generator rotor is equipped with an exciter, and the generator rotor has a symmetrical inter-turn short-circuit fault between the two poles; the generator rotor is equipped with an exciter, and the generator rotor has multiple adjacent turns short-circuited; the generator rotor is equipped with an exciter, and has different input pulse peak voltage conditions.

[0017] In the method for determining the RSO test evaluation standard for a rotor with a brushless exciter according to the present invention, simulating a faulty operating condition of a generator rotor with an exciter and obtaining test results of the faulty operating condition include:

[0018] Simulate a generator rotor with an exciter and a short-circuit fault between turns of each magnetic pole coil of the generator rotor and perform a test to obtain test data and waveforms of the short-circuit fault between turns of each magnetic pole coil of the generator rotor;

[0019] Simulate the generator rotor with exciter and the generator rotor inter-turn insulation with different short-circuit resistance faults and perform tests to obtain the test data and waveforms of the generator rotor inter-turn insulation with different short-circuit resistance faults;

[0020] Simulate a generator rotor with an exciter and a multi-point inter-turn short circuit fault between the generator rotor turns and perform a test to obtain test data and waveforms of the multi-point inter-turn short circuit fault between the generator rotor turns;

[0021] Simulate a generator rotor with an exciter and a symmetrical inter-turn short-circuit fault on the two poles of the generator rotor and perform a test to obtain test data and waveforms of the symmetrical inter-turn short-circuit fault on the two poles of the generator rotor;

[0022] Simulate a generator rotor with an exciter and a generator rotor with multiple adjacent turns short-circuit fault and perform a test to obtain test data and waveforms of the generator rotor with multiple adjacent turns short-circuit fault;

[0023] The generator rotor with exciter and different input pulse peak voltage working conditions are simulated and tested to obtain test data and waveforms under different input pulse peak voltage working conditions.

[0024] In the method for determining the RSO test evaluation standard for a brushless exciter rotor according to the present invention, analyzing the test results of the fault condition to obtain the analysis results of the fault condition includes:

[0025] Sorting out and analyzing the test data and waveforms of the inter-turn short-circuit fault of each magnetic pole coil of the generator rotor to obtain the analysis results of the inter-turn short-circuit state of each magnetic pole coil;

[0026] Sorting out and analyzing the test data and waveforms of different short-circuit resistance faults of the generator rotor interturn insulation to obtain analysis results of different short-circuit resistance fault states;

[0027] Arranging and analyzing test data and waveforms of the generator rotor multi-point inter-turn short circuit fault to obtain an analysis result of the multi-point inter-turn short circuit fault state;

[0028] Sorting out and analyzing the test data and waveform of the generator rotor bipolar symmetrical turn-to-turn short circuit fault to obtain an analysis result of the bipolar symmetrical turn-to-turn short circuit fault state;

[0029] Arranging and analyzing the test data and waveform of the adjacent multi-turn short-circuit fault of the generator rotor to obtain an analysis result of the adjacent multi-turn short-circuit fault state;

[0030] The test data and waveforms under the different input pulse peak voltage working conditions are sorted and analyzed to obtain analysis results under the different input pulse peak voltage working conditions.

[0031] In the method for determining the RSO test evaluation criteria for a brushless exciter rotor described in the present invention, the evaluation criteria are: the absolute value of the characteristic waveform voltage deviation is less than 100 mV, and the absolute value deviation rate is less than 2.5%.

[0032] The present invention also provides a device for determining an RSO test evaluation standard for a brushless exciter rotor, comprising:

[0033] Normal operating condition simulation unit, used to simulate the normal operating conditions of a single generator rotor and a generator rotor with an exciter, and obtain test results under normal operating conditions;

[0034] A fault condition simulation unit is used to simulate the fault condition of the generator rotor with the exciter and obtain the test results of the fault condition;

[0035] a fault data analysis unit, configured to analyze the test result of the fault condition and obtain an analysis result of the fault condition;

[0036] The evaluation criterion determination unit is used to summarize and collate the test results of the normal working condition, the test results of the fault working condition and the analysis results of the fault working condition to obtain the evaluation criteria for the RSO test results of the three-machine brushless exciter rotor.

[0037] The present invention also provides a storage medium storing a computer program, wherein the computer program is suitable for being loaded by a processor to execute the steps of the method for determining the RSO test evaluation standard of a brushless exciter rotor as described above.

[0038] The present invention also provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor executes the steps of the above-mentioned method for determining the RSO test evaluation standard for a brushless exciter rotor by calling the computer program stored in the memory.

[0039] The method, device, medium, and equipment for determining evaluation criteria for RSO testing of a rotor with a brushless exciter according to the present invention have the following beneficial effects: The method comprises the following steps: simulating normal operating conditions of a single generator rotor and a generator rotor with an exciter, and obtaining test results for the normal operating conditions; simulating faulty operating conditions of a generator rotor with an exciter, and obtaining test results for the faulty operating conditions; analyzing the test results for the faulty operating conditions, and obtaining analysis results for the faulty operating conditions; and summarizing and arranging the test results for the normal operating conditions, the test results for the faulty operating conditions, and the analysis results for the faulty operating conditions to obtain evaluation criteria for the RSO test results of a rotor with a three-motor brushless exciter. The evaluation criteria provided by the present invention are applicable to a new RSO test method for a nuclear power plant generator rotor with a three-motor brushless exciter, enabling effective evaluation of the test results of the new test method without disengaging the excitation pulleys, and completing a comprehensive evaluation of the insulation condition of the generator rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0041] Figure 1 This is a schematic diagram of the excitation circuit provided by the present invention;

[0042] Figure 2 This is the electrical schematic diagram of the RSO test wiring and pulse signal input provided by the present invention;

[0043] Figure 3 It is a flow chart of a method for determining RSO test evaluation criteria for a brushless exciter rotor provided by the present invention;

[0044] Figure 4 The present invention provides a logic block diagram of a device for determining an RSO test evaluation standard for a brushless exciter rotor. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] In order to solve the problem that the existing judgment standard is not applicable to the new method for RSO test of the rotor with three brushless exciters, the present invention provides a method for determining the evaluation standard of the RSO test of the rotor with a brushless exciter. The evaluation standard provided by the method is applicable to the validity judgment of the detection result of the RSO test of the rotor of the three brushless exciters carried out on the rotor of the nuclear power plant without disengaging the excitation pair wheels, and evaluates whether there are inter-turn insulation defects in the generator rotor winding, so as to realize the overall evaluation of the insulation status of the generator rotor without disengaging the excitation pair wheels.

[0047] Specifically, the generator rotor body consists of four poles, each with eight rotor coil slots, for a total of 32 rotor coil slots, each housing rotor coils. Each magnetic pole contains four coils, with six, seven, eight, and eight turns, respectively, from the innermost to the outermost. Each coil is placed in two slots, connected by bridges. The rotor windings have three inter-pole connecting wires, made of the same material as the coils and forming an Ω-shaped elastic structure. The pole leads are welded to the coils, and the other ends are fixed to conductive screws, which are secured to the axial leads via tapered threads. The axial leads are bolted to the square leads.

[0048] like Figure 1As shown in the figure, the brushless exciter consists of a permanent magnet auxiliary exciter, an AC main exciter, and a diode rectifier installed on the same shaft. The high-frequency power generated by the stator of the permanent magnet auxiliary exciter is transmitted to the automatic voltage regulator; the DC power output by the automatic voltage regulator is transmitted to the stator field winding of the AC exciter ( Figure 1 The AC exciter armature (the rotor winding of the AC main exciter) consists of a multi-phase winding and transmits high-frequency power to a diode rectifier. The DC output of the diode rectifier serves as the excitation power source, which is fed through a conductive ring, a conductive screw, and an axial lead installed in the center hole of the shaft, ultimately via the angled lead to the generator rotor winding. The generator and exciter are coaxially coupled and driven by the steam turbine, forming a more reliable excitation system. During the current overhaul, to perform the generator RSO test, it was necessary to remove the excitation pulleys, including 18 M30 coupling bolts, retaining sleeves, shear sleeves, and four M30 hexagon socket bolts. The excitation pulleys must then be completely disconnected before the RSO pulse signal can be input from the angled lead at the excitation end of the generator rotor to the generator rotor winding. Due to the disconnection of the excitation wheel, it is necessary to lift the excitation machine, measure the flatness of the end face of the excitation wheel, measure the end face deviation data, adjust the concentricity, and perform rotor rotation swing test. The operation process is complicated, the workload is large, and it takes a long time. At the same time, there are also risks such as bolts seizing, major equipment being damaged and becoming unusable, and hoisting and transportation. In response to these situations, a new detection method has been developed for nuclear power plant generators to perform generator rotor RSO test with three-machine brushless exciter rotor without disconnecting the excitation wheel (the test wiring and pulse signal input electrical schematic diagram are shown as follows Figure 2 This new testing method can avoid major risks, reduce workload, and improve equipment reliability. However, the original evaluation criteria are no longer applicable to the new measurement method, and a new evaluation standard that matches the new measurement method is urgently needed.

[0049] Based on the above needs, the present invention simulates the normal operating conditions and fault conditions of the generator by using the exciter rotor in combination with the design layout and end structure of the generator rotor winding, measures and collects the corresponding RSO test waveform changes, organizes and analyzes the data, finds the change rules, and clarifies the appropriate evaluation criteria.

[0050] Specifically, in a preferred embodiment, Figure 3 As shown, the method for determining the RSO test evaluation standard of the brushless exciter rotor provided by the present invention includes the following steps:

[0051] Step S101: Simulate the normal operating conditions of a single generator rotor and a generator rotor with an exciter, and obtain test results of the normal operating conditions.

[0052] Among them, normal operating conditions include: the state of a single generator rotor with no inter-turn short circuit and the state of a generator rotor with an exciter with no inter-turn short circuit; the test results of normal operating conditions include: the state waveform of a single generator rotor with no inter-turn short circuit and the state waveform of a generator rotor with an exciter with no inter-turn short circuit.

[0053] In some embodiments, simulating the normal operating conditions of a single generator rotor and a generator rotor with an exciter and obtaining test results for these normal operating conditions includes: simulating a single generator rotor with no inter-turn short circuits for testing, obtaining a waveform for the single generator rotor with no inter-turn short circuits; simulating a generator rotor with an exciter with no inter-turn short circuits for testing, obtaining a waveform for the generator rotor with an exciter with no inter-turn short circuits. Specifically, by simulating two normal operating conditions: a single generator rotor with no inter-turn short circuits and a generator rotor with an exciter with no inter-turn short circuits, measuring and recording relevant test data, and obtaining corresponding state waveforms and waveform data. When performing the generator rotor with an exciter simulation test for the no inter-turn short circuits, a pulse signal is input from the interpole connection line after the rotor is connected to the exciter, and the rotor is in a normal state. The present invention does not specifically limit the method for measuring and obtaining data / waveforms, as long as the corresponding test data / waveforms can be obtained.

[0054] Step S102: Simulate a faulty operating condition of the generator rotor with an exciter, and obtain a test result of the faulty operating condition.

[0055] Optionally, in an embodiment of the present invention, the fault conditions include: the generator rotor is equipped with an exciter, and there is a short circuit fault between the turns of each pole coil of the generator rotor, the generator rotor is equipped with an exciter, and there is a short circuit resistance fault between the turns of the generator rotor, the generator rotor is equipped with an exciter, and there is a multi-point short circuit fault between the turns of the generator rotor, the generator rotor is equipped with an exciter, and there is a symmetrical short circuit fault between the turns of the generator rotor at both poles, the generator rotor is equipped with an exciter, and there is a short circuit fault between adjacent turns of the generator rotor, and the generator rotor is equipped with an exciter and has different input pulse peak voltage conditions.

[0056] Among them, simulating the fault condition of the generator rotor with an exciter and obtaining the test results of the fault condition include: simulating the generator rotor with an exciter and the short-circuit fault between the turns of each pole coil of the generator rotor and performing a test to obtain the test data and waveform of the short-circuit fault between the turns of each pole coil of the generator rotor; simulating the generator rotor with an exciter and the different short-circuit resistance faults of the generator rotor interturn insulation and performing a test to obtain the test data and waveform of the different short-circuit resistance faults of the generator rotor interturn insulation; simulating the generator rotor with an exciter and the multi-point short-circuit fault between the turns of the generator rotor and performing a test to obtain Test data and waveforms of multi-point inter-turn short-circuit faults between generator rotor turns; simulate the generator rotor with an exciter and the generator rotor bipolar symmetrical inter-turn short-circuit fault and test it to obtain the test data and waveforms of the generator rotor bipolar symmetrical inter-turn short-circuit fault; simulate the generator rotor with an exciter and the generator rotor adjacent multi-turn short-circuit fault and test it to obtain the test data and waveforms of the generator rotor adjacent multi-turn short-circuit fault; simulate the generator rotor with an exciter and different input pulse peak voltage working conditions and test it to obtain the test data and waveforms under different input pulse peak voltage working conditions.

[0057] Step S103: Analyze the test result of the fault condition to obtain the analysis result of the fault condition.

[0058] In some embodiments, the test results of the fault conditions are analyzed to obtain the analysis results of the fault conditions, including: organizing and analyzing the test data and waveforms of the short-circuit faults between the turns of each pole coil of the generator rotor to obtain the analysis results of the short-circuit status of each pole coil; organizing and analyzing the test data and waveforms of the different short-circuit resistance faults of the insulation between the turns of the generator rotor to obtain the analysis results of the different short-circuit resistance fault states; organizing and analyzing the test data and waveforms of the multi-point short-circuit faults between the turns of the generator rotor to obtain the analysis results of the multi-point short-circuit fault state; organizing and analyzing the test data and waveforms of the bipolar symmetrical short-circuit faults between the turns of the generator rotor to obtain the analysis results of the bipolar symmetrical short-circuit fault state; organizing and analyzing the test data and waveforms of the adjacent multi-turn short-circuit faults of the generator rotor to obtain the analysis results of the adjacent multi-turn short-circuit fault state; organizing and analyzing the test data and waveforms under different input pulse peak voltage conditions to obtain the analysis results under different input pulse peak voltage conditions.

[0059] Specifically, the fault condition simulation and analysis are as follows:

[0060] (1) For the generator rotor with exciter, the waveform of the short-circuit state between the turns of each pole coil of the generator rotor is simulated respectively, and the waveform data is measured, recorded and analyzed to obtain the corresponding analysis results, as shown in Table 1.

[0061] Table 1 Waveform data simulating the short-circuit state between the turns of each pole coil of the generator rotor

[0062]

[0063]

[0064] (2) The generator rotor is equipped with an exciter, and different short-circuit resistance test waveforms are performed on the generator rotor inter-turn insulation. The generator rotor inter-turn insulation different short-circuit resistance tests include: metallic inter-turn short circuit: short-circuit resistance is less than 0.2Ω; low-resistance inter-turn short circuit: short-circuit resistance is between 0.2Ω and 5Ω; high-resistance inter-turn short circuit: short-circuit resistance is between 5Ω and 10Ω.

[0065] The waveform data and analysis results are organized as shown in Table 2.

[0066] Table 2 Test waveform data of different short-circuit resistances of simulated generator rotor interturn insulation

[0067]

[0068] (3) The generator rotor is equipped with an exciter. The generator rotor is tested under multi-point inter-turn short-circuit conditions, and the waveform data and analysis results are organized as shown in Table 3.

[0069] Table 3 Test waveform data simulating multi-point short circuit between generator rotor turns

[0070]

[0071]

[0072] (4) The generator rotor with exciter was tested for a symmetrical turn-to-turn short circuit fault on both poles of the generator rotor, and the waveform data and analysis results were compiled. The final analysis result showed that there was a possibility of misjudgment for extremely symmetrical turn-to-turn short circuits.

[0073] (5) The generator rotor is equipped with an exciter. A short-circuit fault of multiple adjacent turns of the generator rotor is simulated and tested. The waveform data and analysis results are organized as shown in Table 4.

[0074] Table 4 Test waveform data simulating short circuit of adjacent turns of generator rotor

[0075]

[0076] (6) Generator rotor with exciter, simulate the effect of changing the input pulse peak voltage on the generator rotor RSO test waveform, and organize the waveform data and analysis results. The details are shown in Table 5.

[0077] Table 5 Data on the impact of changing the input pulse peak voltage on the generator rotor RSO test waveform

[0078]

[0079] Step S104: Summarize and collate the test results of the normal working condition, the test results of the fault working condition, and the analysis results of the fault working condition to obtain an evaluation criterion for the RSO test results of the three-machine brushless exciter rotor.

[0080] By simulating different fault conditions in step S103 and analyzing the recorded measured data / waveforms, corresponding analysis results are obtained. The test results for normal conditions, fault conditions, and the analysis results for each fault condition are summarized and collated to yield the following conclusions: 1) For rotor or exciter ground faults, insulation measurements are used as the standard. 2) For symmetrical interturn shorts between poles #1 and #4, or between poles #2 and #3, the RSO waveform may not be present. Based on this conclusion, the evaluation criteria for the RSO test results of a three-motor brushless exciter rotor are as follows: the absolute value of the characteristic waveform voltage deviation is less than 100mV, and the absolute value deviation rate is less than 2.5%. In other words, when the absolute value of the measured characteristic waveform voltage deviation is less than 100mV, and the absolute value deviation rate is less than 2.5%, the generator rotor winding is considered to have no interturn insulation defects and is in good overall insulation condition.

[0081] Furthermore, the present invention also provides coil fault judgment criteria and location in each magnetic pole, as shown in Table 6.

[0082] Table 6 Fault judgment criteria and location of each coil

[0083] Coil number Deviation rate (%) Characteristic waveform voltage deviation (mV) #1 2.5 100 #2 3.5 150 #3 5.5 200 #4 7.5 300

[0084] The fault judgment criteria for each coil in the four magnetic poles (#1 pole, #2 pole, #3 pole and #4 pole) of the generator rotor are judged by the standards in Table 6. The #1 coil, #2 coil, #3 coil and #4 coil in Table 6 refer to the four coils in any magnetic pole. As shown in Table 6, when the characteristic waveform voltage deviation of the #1 coil reaches 100mV or above, and the absolute value deviation rate reaches 2.5% or above, it is judged that the #1 coil is short-circuited (that is, if the coil of one magnetic pole is equivalent to a wire, it is a short-circuit fault in the front 1 / 4); when the characteristic waveform voltage deviation of the #2 coil reaches 150mV or above, and the absolute value deviation rate reaches 3.5% or above, it is judged that the tail end of the #1 coil to the #2 coil is short-circuited (that is, if the coil of one magnetic pole is equivalent to a wire, it is a short-circuit fault in the 2 / 4 section); when the #3 If the voltage deviation of the characteristic waveform of the coil reaches 200mV or above, and the absolute value deviation rate reaches 5.5% or above, it is judged that a short circuit fault occurs from the tail end of the #2 coil to the #3 coil (that is, if the coil of one magnetic pole is equivalent to a wire, then the 3 / 4 section is short-circuited); when the voltage deviation of the characteristic waveform of the #4 coil reaches 200mV or above, and the absolute value deviation rate reaches 5.5% or above, it is judged that a short circuit fault occurs from the tail end of the #3 coil to the #4 coil (that is, if the coil of one magnetic pole is equivalent to a wire, then the last 1 / 4 section is short-circuited).

[0085] The method for determining evaluation criteria for RSO testing of brushless exciter rotors provided by this invention is applicable to the evaluation criteria for a new RSO test method for nuclear power plant generator rotors with three-motor brushless exciters. This method allows for validating the results of RSO tests on generator rotors with three-motor brushless exciters without disconnecting the exciter pulleys. It accurately assesses the presence of interturn insulation defects in the generator rotor windings and enables comprehensive evaluation of the generator rotor insulation condition without disconnecting the exciter pulleys. This method eliminates the additional steps required by the previous test method, such as lifting the entire exciter, measuring the end surface flatness and runout of the exciter pulleys, adjusting concentricity, and testing the rotor's rotational runout. It also avoids the risks of exciter pulley bolts seizing, damage to critical equipment resulting in unavailability, and the need for lifting and transportation. This reduces safety risks during maintenance, improves the intrinsic safety of critical equipment maintenance, and optimizes the critical path for power plant maintenance. This method not only has significant practical value but also significantly enhances intrinsic safety, providing effective support for subsequent sustainable applications.

[0086] like Figure 4 As shown, the present invention also provides a device for determining the RSO test evaluation standard for a brushless exciter rotor.

[0087] The device for determining the RSO test evaluation standard of the brushless exciter rotor includes:

[0088] The normal operating condition simulation unit 401 is used to simulate the normal operating conditions of a single generator rotor and a generator rotor with an exciter, and obtain test results of the normal operating conditions.

[0089] The fault condition simulation unit 402 is used to simulate the fault condition of the generator rotor with exciter and obtain the test result of the fault condition.

[0090] The fault data analysis unit 403 is configured to analyze the test result of the fault condition to obtain an analysis result of the fault condition.

[0091] The evaluation criterion determination unit 404 is configured to summarize and collate the test results of the normal operating condition, the test results of the faulty operating condition, and the analysis results of the faulty operating condition to obtain an evaluation criterion for the RSO test results of the three-machine brushless exciter rotor.

[0092] Specifically, the specific coordination operation process between the various units in the device for determining the RSO test evaluation standard for the brushless exciter rotor can refer to the above-mentioned method for determining the RSO test evaluation standard for the brushless exciter rotor, and will not be repeated here.

[0093] In addition, an electronic device of the present invention includes a memory and a processor; the memory is used to store a computer program; the processor is used to execute the computer program to implement the method for determining the RSO test evaluation standard of the brushless exciter rotor as described in any of the above items. Specifically, according to an embodiment of the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed by an electronic device and, when executed, performs the above functions defined in the method of the embodiment of the present invention. The electronic device in the present invention can be a terminal such as a notebook, desktop, tablet computer, smart phone, or a server.

[0094] In addition, the present invention provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-mentioned methods for determining the RSO test evaluation criteria for a brushless exciter rotor. Specifically, it should be noted that the storage medium of the present invention may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present invention, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to wires, optical cables, RF (radio frequency), etc., or any suitable combination thereof.

[0095] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0096] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0097] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0098] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0099] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. All equivalent variations and modifications within the scope of the claims of the present invention are intended to be covered by the claims of the present invention.

Claims

1. A method for determining the RSO test evaluation standard for a brushless exciter rotor, characterized in that: The following steps are involved: Simulate the normal operating conditions of a single generator rotor and a generator rotor with an exciter, and obtain test results under normal operating conditions; Simulate the fault condition of the generator rotor with exciter and obtain the test results of the fault condition; Analyzing the test results of the fault condition to obtain an analysis result of the fault condition; Based on the test results of the normal working condition, the test results of the fault working condition and the analysis results of the fault working condition, the evaluation criteria for the RSO test results of the three-machine brushless exciter rotor are obtained.

2. The method for determining the RSO test evaluation standard of a brushless exciter rotor according to claim 1, characterized in that: The normal operating conditions include: a state where the generator single rotor has no inter-turn short circuit and a state where the generator rotor with an exciter has no inter-turn short circuit; The test results of the normal working condition include: the waveform of the generator single rotor without inter-turn short circuit and the waveform of the generator rotor with exciter without inter-turn short circuit.

3. The method for determining the RSO test evaluation standard of a brushless exciter rotor according to claim 2, characterized in that: The simulation of the normal operating conditions of the generator single rotor and the generator rotor with exciter and obtaining the test results of the normal operating conditions include: The test is conducted by simulating the state of a single-rotor generator without inter-turn short circuit to obtain the waveform of the state of a single-rotor generator without inter-turn short circuit; The generator rotor with exciter is simulated for testing in the state without inter-turn short circuit, and the waveform of the generator rotor with exciter in the state without inter-turn short circuit is obtained.

4. The method for determining the RSO test evaluation standard of a brushless exciter rotor according to claim 1, characterized in that: The fault conditions include: the generator rotor is equipped with an exciter, and the short circuit fault occurs between the turns of the generator rotor pole coils; the generator rotor is equipped with an exciter, and the insulation between the generator rotor turns is different short circuit resistance fault; the generator rotor is equipped with an exciter, and the generator rotor turns have multiple-point short circuit faults; the generator rotor is equipped with an exciter, and the generator rotor has symmetrical short circuit faults between the two poles; the generator rotor is equipped with an exciter, and the generator rotor has multiple adjacent short circuit faults; the generator rotor is equipped with an exciter, and has different input pulse peak voltage conditions.

5. The method for determining the RSO test evaluation standard for a brushless exciter rotor according to claim 4, characterized in that: The simulating the fault condition of the generator rotor with the exciter and obtaining the test result of the fault condition includes: Simulate a generator rotor with an exciter and a short-circuit fault between turns of each magnetic pole coil of the generator rotor and perform a test to obtain test data and waveforms of the short-circuit fault between turns of each magnetic pole coil of the generator rotor; Simulate the generator rotor with exciter and the generator rotor inter-turn insulation with different short-circuit resistance faults and perform tests to obtain the test data and waveforms of the generator rotor inter-turn insulation with different short-circuit resistance faults; Simulate a generator rotor with an exciter and a multi-point inter-turn short circuit fault between the generator rotor turns and perform a test to obtain test data and waveforms of the multi-point inter-turn short circuit fault between the generator rotor turns; Simulate a generator rotor with an exciter and a symmetrical inter-turn short-circuit fault on the two poles of the generator rotor and perform a test to obtain test data and waveforms of the symmetrical inter-turn short-circuit fault on the two poles of the generator rotor; Simulate a generator rotor with an exciter and a generator rotor with multiple adjacent turns short-circuit fault and perform a test to obtain test data and waveforms of the generator rotor with multiple adjacent turns short-circuit fault; The generator rotor with exciter and different input pulse peak voltage working conditions are simulated and tested to obtain test data and waveforms under different input pulse peak voltage working conditions.

6. The method for determining the RSO test evaluation standard for a brushless exciter rotor according to claim 5, characterized in that: Analyzing the test result of the fault condition to obtain the analysis result of the fault condition includes: Sorting out and analyzing the test data and waveforms of the inter-turn short-circuit fault of each magnetic pole coil of the generator rotor to obtain the analysis results of the inter-turn short-circuit state of each magnetic pole coil; Sorting out and analyzing the test data and waveforms of different short-circuit resistance faults of the generator rotor interturn insulation to obtain analysis results of different short-circuit resistance fault states; Arranging and analyzing test data and waveforms of the generator rotor multi-point inter-turn short circuit fault to obtain an analysis result of the multi-point inter-turn short circuit fault state; Sorting out and analyzing the test data and waveform of the generator rotor bipolar symmetrical turn-to-turn short circuit fault to obtain an analysis result of the bipolar symmetrical turn-to-turn short circuit fault state; Arranging and analyzing the test data and waveform of the adjacent multi-turn short-circuit fault of the generator rotor to obtain an analysis result of the adjacent multi-turn short-circuit fault state; The test data and waveforms under the different input pulse peak voltage working conditions are sorted and analyzed to obtain analysis results under the different input pulse peak voltage working conditions.

7. The method for determining the RSO test evaluation standard for a brushless exciter rotor according to any one of claims 1 to 6, characterized in that: The evaluation criteria are: the absolute value of the characteristic waveform voltage deviation is less than 100 mV, and the absolute value deviation rate is less than 2.5%.

8. A device for determining the RSO test evaluation standard for a brushless exciter rotor, characterized in that: include: Normal operating condition simulation unit, used to simulate the normal operating conditions of a single generator rotor and a generator rotor with an exciter, and obtain test results under normal operating conditions; A fault condition simulation unit is used to simulate the fault condition of the generator rotor with the exciter and obtain the test results of the fault condition; a fault data analysis unit, configured to analyze the test result of the fault condition and obtain an analysis result of the fault condition; The evaluation criterion determination unit is used to summarize and collate the test results of the normal working condition, the test results of the fault working condition and the analysis results of the fault working condition to obtain the evaluation criteria for the RSO test results of the three-machine brushless exciter rotor.

9. A storage medium, characterized in that: The storage medium stores a computer program, which is suitable for being loaded by a processor to execute the steps of the method for determining the RSO test evaluation standard of a brushless exciter rotor according to any one of claims 1 to 7.

10. An electronic device, characterized in that: The invention comprises a memory and a processor, wherein a computer program is stored in the memory, and the processor executes the steps of the method for determining the RSO test evaluation standard of a brushless exciter rotor according to any one of claims 1 to 7 by calling the computer program stored in the memory.

Images