CN117313407A - Short-circuit moment analysis and optimization method for medium-speed permanent magnet synchronous wind driven generator - Google Patents

Short-circuit moment analysis and optimization method for medium-speed permanent magnet synchronous wind driven generator Download PDF

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Publication number
CN117313407A
CN117313407A CN202311354335.9A CN202311354335A CN117313407A CN 117313407 A CN117313407 A CN 117313407A CN 202311354335 A CN202311354335 A CN 202311354335A CN 117313407 A CN117313407 A CN 117313407A
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China
Prior art keywords
short
generator
circuit
transmission chain
scheme
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Inventor
陈薛梅
温俊伟
蔡梅园
杜炜
余民姚
聂思宇
杨静
柯余东
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China Shipbuilding Haizhuang Wind Power Co ltd
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China Shipbuilding Haizhuang Wind Power Co ltd
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Priority to CN202311354335.9A priority Critical patent/CN117313407A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00—Details relating to the application field
    • G06F2113/06—Wind turbines or wind farms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces

Abstract

The invention provides a short-circuit moment analysis and optimization method of a medium-speed permanent magnet synchronous wind driven generator, which comprises the steps of obtaining a simulation result by adopting similar double-winding and single-winding simulation, comparing the simulation result with a preset threshold value to judge the feasibility of a preliminary electromagnetic scheme of the generator and a preliminary scheme of a semi-integrated transmission chain with a gear box, and repeatedly obtaining the feasible preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box through iteration by adjusting the optimized preliminary electromagnetic scheme of the generator so as to realize the optimization of the scheme. Through the operation, the probability of short circuit of the single winding and the double winding of the generator is greatly reduced.

Description

Short-circuit moment analysis and optimization method for medium-speed permanent magnet synchronous wind driven generator
Technical Field
The invention relates to the technical field of wind power generation, in particular to a short-circuit moment analysis and optimization method of a medium-speed permanent magnet synchronous wind power generator.
Background
With the rapid development of offshore wind power generation in recent years, the semi-direct-drive unit is widely used, and the medium-speed permanent magnet synchronous wind power generator is used as a generator type commonly used for the semi-direct-drive unit, so that a large number of generators are used. The middle-speed permanent magnet synchronous wind driven generator adopts a permanent magnet rotor, the rotating speed of the middle-speed permanent magnet synchronous wind driven generator is lower than that of a doubly-fed wind driven generator and a high-speed permanent magnet synchronous generator by about hundreds of turns, the failure rate of a generator bearing is lower, and the weight of the middle-speed permanent magnet synchronous wind driven generator is far smaller than that of a low-speed permanent magnet synchronous generator (also called a direct-drive permanent magnet synchronous generator), so that the middle-speed permanent magnet synchronous wind driven generator is easy to transport, install and maintain, and is widely applied to offshore wind driven generator sets.
During the working operation of the wind turbine, the occurrence of short circuit is generally the following two conditions: firstly, a short circuit occurs in a power grid and power grid terminal equipment; and secondly, the generator is short-circuited. In a full-power generation system, when a power grid, a transformer and other power grid end equipment are short-circuited, short-circuit moment cannot be transmitted to a transmission chain end due to the existence of the full-power converter, and a gear box and front end equipment thereof cannot be damaged; when the generator is in short circuit, the short-circuit moment of the generator is transmitted to the gear box and front-end equipment thereof, and even if the control system of the wind generating set is unloaded at the moment, the magnetic field provided by the permanent magnet rotor cannot disappear instantaneously due to the adoption of the permanent magnet synchronous generator, so that the short-circuit moment still exists, and the gear box and the front-end equipment thereof are damaged; for high-power offshore wind turbines, the transmission chain mostly adopts an integrated structure to a certain extent, and no coupling is used, so that the short-circuit moment of the generator can still be transmitted to the transmission chain, and the transmission chain, particularly teeth of a gear box, are damaged.
Therefore, in designing a generator, it is necessary to design a generator that reduces the probability of occurrence of a short circuit. The short circuit of the generator is mainly caused by winding short circuit, and the short circuit moment of the generator can be determined and optimized through analysis of the winding, so that the short circuit occurrence probability of the generator is reduced, but no analysis and optimization method exists at present.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a short-circuit moment analysis and optimization method of a medium-speed permanent magnet synchronous wind driven generator, which aims to solve the technical problem that the short-circuit moment of the generator is determined and optimized through analysis of windings in the prior art.
A short-circuit moment analysis and optimization method for a medium-speed permanent magnet synchronous wind driven generator comprises the following steps: establishing a first three-dimensional model of the generator by using ansoft based on the received generator preliminary electromagnetic scheme; based on the received semi-integrated transmission chain preliminary scheme containing the gear box, adopting a solidworks to build a second three-dimensional model related to the transmission chain; designing a duplex winding load circuit in the first three-dimensional model, and obtaining a first short-circuit moment time schedule through simulation; based on the first three-dimensional model and the second three-dimensional model, taking the first short-circuit moment time sequence table as excitation, and carrying out load simulation of a complete machine transmission chain by adopting flex5 to obtain a first simulation result; judging whether the first simulation result accords with a preset threshold value or not; if the judging result is not in conformity, designing a single-winding load circuit, and obtaining a second short-circuit moment time sequence table through simulation; taking the second short-circuit moment time sequence table as excitation, and carrying out load simulation of a whole transmission chain by adopting flex5 to obtain a second simulation result; judging whether the second simulation result accords with the preset threshold value, and analyzing the feasibility of the preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box according to the judgment result; if the preliminary electromagnetic scheme of the generator is not feasible, the preliminary electromagnetic scheme of the generator is adjusted and optimized, the optimized preliminary electromagnetic scheme of the generator is used as the preliminary electromagnetic scheme of the generator, and the steps are repeated iteratively until the preliminary electromagnetic scheme of the generator is feasible.
In one embodiment, designing a duplex winding load circuit in the first three-dimensional model, and simulating to obtain a first short-circuit moment time schedule includes: designing a duplex winding load circuit based on the first three-dimensional model; performing double-winding simulation under the no-load state of the generator by using maxwell to obtain a short-circuit moment time sequence table under the no-load state as a first numerical value corresponding table; and performing double-winding simulation under the rated full-power working condition of the generator by using maxwell, and obtaining a maximum short-circuit moment time sequence table under a theoretical state as a first short-circuit moment time sequence table based on the first numerical value corresponding table.
In one embodiment, the preset threshold includes a rated torque and an initial gearbox input load, wherein the rated torque is 1.8T N 。
In one embodiment, the first simulation result includes a first drive train short circuit torque and a first gearbox input load.
In one embodiment, the step of determining whether the first simulation result meets a preset threshold includes: comparing the first transmission chain short-circuit moment with the rated torque, and judging whether the transmission chain slips or not; comparing the first gearbox input load with the initial gearbox input load, and judging that the gearbox input shaft is increased; if the transmission chain does not slip and the input load of the gear box is not increased, the judgment result is in line; if the transmission chain slips or the input load of the gearbox increases, the judgment result is not consistent.
In one embodiment, comparing the first drive chain short-circuit torque with the rated torque, the step of determining whether the drive chain slips includes: when the first transmission chain short-circuit moment is smaller than the rated torque, the transmission chain is not slipped; and when the short-circuit moment of the first transmission chain is larger than or equal to the rated torque, the transmission chain slips.
In one embodiment, after determining whether the first simulation result meets the preset threshold, the method further includes: and if the judging result is in accordance with the judging result, the preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box are considered to be feasible, and the analysis of the short-circuit moment of the generator is completed.
In one embodiment, if the above determination result is not met, designing a single winding load circuit, and obtaining the second short-circuit moment schedule by simulation includes: if the judging result is in accordance, designing a single-winding load circuit based on the first three-dimensional model; performing single-resistance winding simulation under the no-load state of the generator by adopting ansoft to obtain a short-circuit moment time sequence table under the no-load state as a second numerical value corresponding table; and carrying out single-winding simulation under the rated full-power working condition of the generator by adopting ansoft, and obtaining a maximum short-circuit moment time sequence table under a theoretical state as a second short-circuit moment time sequence table based on the second numerical value corresponding table.
In one embodiment, the second simulation result includes a second drive train short circuit torque and a second gearbox input load.
In one embodiment, the step of determining whether the second simulation result meets the preset threshold, and analyzing the feasibility of the preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gearbox according to the determination result includes: comparing the second transmission chain short-circuit moment with the rated torque, and judging whether the transmission chain slips or not; comparing the second gearbox input load with the initial gearbox input load, and judging that the gearbox input shaft is increased; if the transmission chain does not skid and the input load of the gear box does not increase, the preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box are feasible, and the analysis of the short-circuit moment of the generator is completed; if there is a slip in the drive chain or an increase in the gearbox input load, the generator preliminary electromagnetic scheme, the semi-integrated drive chain preliminary scheme with gearbox, is not feasible.
According to the technical scheme, the beneficial technical effects of the invention are as follows:
1. according to the scheme, simulation results are obtained through simulation similar to double windings and single windings, the simulation results are compared with a preset threshold value to judge the feasibility of the preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box, and the feasible preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box can be obtained through iteration repetition through the preliminary electromagnetic scheme of the generator after adjustment and optimization, so that the scheme is optimized. Through the operation, the probability of short circuit of the single winding and the double winding of the generator is greatly reduced.
2. Compared with the prior art that the permanent magnet synchronous generator is mentioned, the scheme can obtain a safer and more reliable electromagnetic scheme of the permanent magnet synchronous generator with higher economical efficiency after being applied to the 10MW medium-speed permanent magnet synchronous generator.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. The term "plurality" means two or more, unless otherwise indicated. In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B. The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B. The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
Compared with the permanent magnet synchronous generator mentioned in the background art, the scheme provided by the invention can be applied to the 10MW medium-speed permanent magnet synchronous generator, and based on the method provided by the following embodiment, the electromagnetic scheme of the permanent magnet synchronous generator with safer and more reliable economy can be finally obtained after the application through the analysis and optimization of the short-circuit moment of the medium-speed permanent magnet synchronous wind power generator, namely, the probability of simultaneously short-circuiting the two windings of the single winding and the double winding of the generator is reduced, and the feasibility of the electromagnetic scheme of the permanent magnet synchronous generator is improved.
In one embodiment, as shown in fig. 1, a method for analyzing and optimizing short-circuit torque of a medium-speed permanent magnet synchronous wind generator is provided, and at present, generators of various wind turbines have single windings or double windings, and multiple conditions of single windings and double windings, the embodiment is exemplified by the most complex single windings and double windings, and specifically includes the following steps:
s101 builds a first three-dimensional model of the generator using ansoft based on the received generator preliminary electromagnetic regime.
Specifically, an initial generator preliminary electromagnetic scheme is first received, and a three-dimensional model, i.e., a first three-dimensional model, is built with an ansoft simulation software for the generator. The primary electromagnetic scheme of the generator comprises a stator resistor, a quadrature axis transient inductance, a synchronous inductance d-axis component, a synchronous inductance q-axis component, a direct axis transient short-circuit time constant, an armature winding short-circuit time constant, electric density, air gap magnetic density and the like.
S102 builds a second three-dimensional model of the drive train using solidworks based on the received semi-integrated drive train preliminary scheme with gearbox.
Specifically, a semi-integrated drive train preliminary solution including a gearbox is first received and a three-dimensional model, i.e., a second three-dimensional model, is built about the drive train using a solidworks. The gear box primary scheme comprises tooth width, deflection coefficient, safety coefficient and the like.
S103, designing a duplex winding load circuit in the first three-dimensional model, and obtaining a first short-circuit moment time schedule through simulation.
In one embodiment, step S103 includes: designing a duplex winding load circuit based on the first three-dimensional model; performing double-winding simulation under the no-load state of the generator by using maxwell to obtain a short-circuit moment time sequence table under the no-load state as a first numerical value corresponding table; and performing double-winding simulation under the rated full-power working condition of the generator by using maxwell, and obtaining a maximum short-circuit moment time sequence table under a theoretical state as a first short-circuit moment time sequence table based on the first numerical value corresponding table.
Specifically, a duplex winding load circuit is designed based on a three-dimensional model of a generator, and then duplex winding simulation based on maxwell is performed, firstly, short circuit electromagnetic simulation of duplex windings of voltage zero-crossing points of single phase, two phases and three phases is performed under no load of the generator, and a short circuit moment time schedule under three states under no load is obtained, wherein the short circuit moment time schedule and a numerical value corresponding table of short circuit moment of the generator at different time points are obtained. And then carrying out short-circuit electromagnetic simulation of double windings of voltage zero-crossing points of single phase, two phases and three phases under the rated full-power working condition of the generator, and adding the obtained maximum short-circuit moment time sequence table (namely a first short-circuit moment time sequence table) which is the same as the theoretical design calculation as excitation into flex5 to carry out load simulation of a complete machine transmission chain.
S104, based on the first three-dimensional model and the second three-dimensional model, using the first short-circuit moment time sequence table as excitation, and carrying out load simulation of a whole transmission chain by adopting flex5 to obtain a first simulation result.
In one embodiment, the first simulation result includes a first drive train short circuit torque and a first gearbox input load.
Specifically, load simulation of the whole transmission chain is carried out based on flex5 simulation software, and a first simulation result including a first transmission chain short-circuit moment and a first gear box input load is obtained and used for judging whether a double-winding problem exists.
In one embodiment, the preset threshold includes a rated torque and an initial gearbox input load, where the rated torque is 1.8T N 。
S105, judging whether the first simulation result meets a preset threshold value.
In one embodiment, step S105 includes: comparing the first transmission chain short-circuit moment with the rated torque, and judging whether the transmission chain slips or not; comparing the first gearbox input load with the initial gearbox input load, and judging that the gearbox input shaft is increased; if the transmission chain does not slip and the input load of the gear box is not increased, the judgment result is in line; if the transmission chain slips or the input load of the gearbox increases, the judgment result is not consistent.
In one embodiment, comparing the first drive chain short-circuit torque with the rated torque, the step of determining whether the drive chain slips includes: when the first transmission chain short-circuit moment is smaller than the rated torque, the transmission chain is not slipped; and when the short-circuit moment of the first transmission chain is larger than or equal to the rated torque, the transmission chain slips.
Specifically, the first drive train short circuit torque is less than 1.8T N ，(T N Rated torque), the driving chain is considered to have no slipping phenomenon, meanwhile, the input load of the gear box is not increased, and the primary scheme of the driving chain and the primary electromagnetic scheme of the generator are considered to be feasible, so that the scheme of the generator and the scheme of the gear box are determined. The short-circuit moment of the first transmission chain is more than or equal to 1.8T N The phenomenon of slipping of the transmission chain is considered to occur, or the input load of the gear box is increased, so that the problem of double windings of the generator under the scheme is solved, and single winding short circuit electromagnetic simulation is conducted.
The principle of double windings and then single windings is carried out: in actual engineering, as long as the double-winding simulation is performed, the transmission chain does not slip, and meanwhile, the input load of the gearbox is not increased, the single winding certainly does not cause problems; in this case, therefore, no simulation of a single winding is required. However, if a problem occurs during double winding simulation, it is necessary to determine whether the problem is caused by the double winding or the single winding and the double winding, in which case, the single winding needs to be simulated first to determine whether the influence caused by the single winding is caused. Therefore, after the simulation result is determined to be not in accordance with the preset threshold value through the double windings, the subsequent single winding simulation is required.
In one embodiment, after step S105, further includes: and if the judging result is in accordance with the judging result, the preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box are considered to be feasible, and the analysis of the short-circuit moment of the generator is completed.
Specifically, if the judging result is in accordance, that is, the primary electromagnetic scheme of the generator and the primary scheme of the semi-integrated transmission chain with the gear box cannot generate double-winding problems, and meanwhile, the single winding cannot be problematic.
And S106, if the judging result is not met, designing a single-winding load circuit, and obtaining a second short-circuit moment time sequence table through simulation.
In one embodiment, step S106 includes designing a single-winding load circuit based on the first three-dimensional model if the above determination result is met; performing single-resistance winding simulation under the no-load state of the generator by adopting ansoft to obtain a short-circuit moment time sequence table under the no-load state as a second numerical value corresponding table; and carrying out single-winding simulation under the rated full-power working condition of the generator by adopting ansoft, and obtaining a maximum short-circuit moment time sequence table under a theoretical state as a second short-circuit moment time sequence table based on the second numerical value corresponding table.
Specifically, a single-winding load circuit is designed based on the three-dimensional model about the generator, and single-winding simulation based on ansoft software is performed. Firstly, carrying out short-circuit electromagnetic simulation of a single-set winding of voltage zero-crossing points of single phase, two phases and three phases under no load to obtain a short-circuit moment time schedule under three states under no load. And then carrying out short-circuit electromagnetic simulation of a single winding of a single-phase, two-phase and three-phase voltage zero-crossing point under the rated full-power working condition, adding the obtained maximum short-circuit moment time sequence table which is the same as the theoretical design calculation into flex5 as excitation to carry out load simulation of the whole transmission chain, and judging whether the transmission chain slips. flex5 is simulation software.
And S107, taking the second short-circuit moment time sequence table as excitation, and carrying out load simulation of the whole transmission chain by adopting flex5 to obtain a second simulation result.
In one embodiment, the second simulation result includes a second drive train short circuit torque and a second gearbox input load.
Specifically, load simulation of the whole transmission chain is carried out based on flex5 simulation software, and a second simulation result comprising a second transmission chain short-circuit moment and a second gear box input load is obtained and used for judging whether a problem occurs in a single winding.
S108, judging whether the second simulation result meets the preset threshold value, and analyzing the feasibility of the preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box according to the judgment result.
In one embodiment, step S108 includes: comparing the second transmission chain short-circuit moment with the rated torque, and judging whether the transmission chain slips or not; comparing the second gearbox input load with the initial gearbox input load, and judging that the gearbox input shaft is increased; if the transmission chain does not skid and the input load of the gear box does not increase, the preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box are feasible, and the analysis of the short-circuit moment of the generator is completed; if there is a slip in the drive chain or an increase in the gearbox input load, the generator preliminary electromagnetic scheme, the semi-integrated drive chain preliminary scheme with gearbox, is not feasible.
Specifically, the second drive train short circuit torque is less than 1.8T N The transmission chain is considered not to slip, and the input load of the gear box is not increased, and the transmission chain primary scheme and the generator primary electromagnetic scheme are considered to be feasible, so that the generator scheme and the gear box scheme are determined, wherein the generator primary electromagnetic scheme comprises a stator resistor, a quadrature axis transient inductance, a synchronous inductance d-axis component, a synchronous inductance q-axis component, a direct axis transient short-circuit time constant, an armature winding short-circuit time constant, electric density, air gap magnetic density and the likeThe gear box primary scheme comprises tooth width, deflection coefficient, safety coefficient and the like. The short-circuit moment of the second transmission chain is more than or equal to 1.8T N The drive chain slip phenomenon is considered to occur or the gearbox input load is increased.
And S109, if the method is not feasible, adjusting and optimizing the preliminary electromagnetic scheme of the generator, taking the optimized preliminary electromagnetic scheme of the generator as the preliminary electromagnetic scheme of the generator, and repeating the iteration until the method is feasible.
Specifically, if the method is not feasible, returning to an optimized generator electromagnetic scheme, adjusting d and q axis inductance values, and repeating the steps until the method is feasible.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.

Claims (10)

1. A short-circuit moment analysis and optimization method of a medium-speed permanent magnet synchronous wind driven generator is characterized by comprising the following steps of:
establishing a first three-dimensional model of the generator by using ansoft based on the received generator preliminary electromagnetic scheme;
based on the received semi-integrated transmission chain preliminary scheme containing the gear box, adopting a solidworks to build a second three-dimensional model related to the transmission chain;
designing a duplex winding load circuit in the first three-dimensional model, and obtaining a first short-circuit moment time schedule through simulation;
based on the first three-dimensional model and the second three-dimensional model, taking the first short-circuit moment time sequence table as excitation, and carrying out load simulation of a complete machine transmission chain by adopting flex5 to obtain a first simulation result;
judging whether the first simulation result accords with a preset threshold value or not;
if the judging result is not in conformity, designing a single-winding load circuit, and obtaining a second short-circuit moment time sequence table through simulation;
taking the second short-circuit moment time sequence table as excitation, and carrying out load simulation of a whole transmission chain by adopting flex5 to obtain a second simulation result;
judging whether the second simulation result accords with the preset threshold value, and analyzing the feasibility of the preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box according to the judgment result;
if the preliminary electromagnetic scheme of the generator is not feasible, the preliminary electromagnetic scheme of the generator is adjusted and optimized, the optimized preliminary electromagnetic scheme of the generator is used as the preliminary electromagnetic scheme of the generator, and the steps are repeated iteratively until the preliminary electromagnetic scheme of the generator is feasible.
2. The method of claim 1, wherein designing a duplex winding load circuit in the first three-dimensional model, simulating to obtain a first short-circuit moment schedule step, comprises:
designing a duplex winding load circuit based on the first three-dimensional model;
performing double-winding simulation under the no-load state of the generator by using maxwell to obtain a short-circuit moment time sequence table under the no-load state as a first numerical value corresponding table;
and performing double-winding simulation under the rated full-power working condition of the generator by using maxwell, and obtaining a maximum short-circuit moment time sequence table under a theoretical state as a first short-circuit moment time sequence table based on the first numerical value corresponding table.
3. The method of claim 1, wherein the preset threshold includes a rated torque and an initial gearbox input load, wherein the rated torque is 1.8T N 。
4. A method according to claim 3, wherein the first simulation result comprises a first drive train short circuit torque and a first gearbox input load.
5. The method of claim 4, wherein the step of determining whether the first simulation result meets a preset threshold comprises:
comparing the first transmission chain short-circuit moment with the rated torque, and judging whether the transmission chain slips or not;
comparing the first gearbox input load with the initial gearbox input load, and judging that the gearbox input shaft is increased;
if the transmission chain does not slip and the input load of the gear box is not increased, the judgment result is in line;
if the transmission chain slips or the input load of the gearbox increases, the judgment result is not consistent.
6. The method of claim 5, wherein comparing the first drive chain short circuit torque to the rated torque, the step of determining whether the drive chain is slipping comprises:
when the first transmission chain short-circuit moment is smaller than the rated torque, the transmission chain is not slipped;
and when the short-circuit moment of the first transmission chain is larger than or equal to the rated torque, the transmission chain slips.
7. The method of claim 1, further comprising, after the step of determining whether the first simulation result meets a preset threshold value:
and if the judging result is in accordance with the judging result, the preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box are considered to be feasible, and the analysis of the short-circuit moment of the generator is completed.
8. The method of claim 1, wherein if the determination result is not met, designing the single winding load circuit, and simulating to obtain the second short-circuit moment schedule comprises:
if the judging result is in accordance, designing a single-winding load circuit based on the first three-dimensional model;
performing single-resistance winding simulation under the no-load state of the generator by adopting ansoft to obtain a short-circuit moment time sequence table under the no-load state as a second numerical value corresponding table;
and carrying out single-winding simulation under the rated full-power working condition of the generator by adopting ansoft, and obtaining a maximum short-circuit moment time sequence table under a theoretical state as a second short-circuit moment time sequence table based on the second numerical value corresponding table.
9. A method according to claim 3, wherein the second simulation result comprises a second drive train short circuit torque and a second gearbox input load.
10. The method of claim 9, wherein the step of determining whether the second simulation result meets the preset threshold value, and analyzing the feasibility of the generator preliminary electromagnetic scheme and the gearbox-containing semi-integrated drive train preliminary scheme according to the determination result comprises:
comparing the second transmission chain short-circuit moment with the rated torque, and judging whether the transmission chain slips or not;
comparing the second gearbox input load with the initial gearbox input load, and judging that the gearbox input shaft is increased;
if the transmission chain does not skid and the input load of the gear box does not increase, the preliminary electromagnetic scheme of the generator and the preliminary scheme of the semi-integrated transmission chain with the gear box are feasible, and the analysis of the short-circuit moment of the generator is completed;
if there is a slip in the drive chain or an increase in the gearbox input load, the generator preliminary electromagnetic scheme, the semi-integrated drive chain preliminary scheme with gearbox, is not feasible.
CN202311354335.9A 2023-10-19 2023-10-19 Short-circuit moment analysis and optimization method for medium-speed permanent magnet synchronous wind driven generator Pending CN117313407A (en)

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