CN202663349U - Wind power generating unit with third harmonic power supply and controlled rotary transformation - Google Patents
Wind power generating unit with third harmonic power supply and controlled rotary transformation Download PDFInfo
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- CN202663349U CN202663349U CN 201220248423 CN201220248423U CN202663349U CN 202663349 U CN202663349 U CN 202663349U CN 201220248423 CN201220248423 CN 201220248423 CN 201220248423 U CN201220248423 U CN 201220248423U CN 202663349 U CN202663349 U CN 202663349U
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Abstract
The utility model provides a brushless excitation method of a wind power generating unit with third harmonic power supply and controlled rotary transformation, relating to the design of a megawatt-level wind power generating unit structure and excitation method of a third harmonic power supply and controlled rotary transformer. The wind power generating unit with third harmonic power supply and controlled rotary transformation is mainly characterized in that a three-phase fundamental wave winding (9) of a main generator is used as a wind power generation output end; the three-phase fundamental wave winding is further connected to a driving pulse generating circuit (25) through a PI adjuster (24); and pulse output is used as a control signal of a middle-frequency inverter (22) so as to control excitation of the generator. A third harmonic winding (8) inputs single-phase input three-phase output middle-frequency rotary transformer (21) through a three-phase rectifier (26) and the middle-frequency inverter (22), a three-phase winding with auxiliary edges subjected to rotary transformation is connected with an exciting winding (10) by a rotary transformation rectifier (15), so that the brushless excitation is realized; and a storage battery charging module (23) is connected with the input end of the inverter, so that power supply is realized in an original excitation process. The scheme is applicable to the brushless excitation of the large-power wind power generating unit, so that the system has strong stability.
Description
Technical field
What the utility model was related is to adopt the power supply of triple-frequency harmonics winding, the MW level synchro wind generator group structure of controlled rotation transformer brushless excitation and the design of exciting method.
Background technology
Synchronous generator adopts the direct current excitation, and its active power and reactive power can be regulated as required, can satisfy the needs of various loads, and because excitation winding and armature winding separately, are easy to realize high performance control.These characteristics so that synchronous generator be widely used.And along with the concern of people to new forms of energy, wind generating technology has obtained fast development, from research situation both domestic and external, be applied at present the high voltage direct current wind energy turbine set what drive directly that generator mainly adopts also is synchronous machine.Its excitation form comprises two kinds in electric excitation and permanent magnetism.Excitation system is an important component part of synchronous generator, adopts which type of excitation mode and excitation control mode will directly have influence on performance, reliability and the specification requirement of generator.In order to improve the reliability of generator, reduce maintenance workload, particularly to be fit to the needs of Oversea wind power generation, adopt the brushless excitation technology more and more to be subject to people's attention.At present, the scheme that is used for synchronous motor brushless excitation is existing multiple, comprises permanent magnet excitation, rotating rectifier formula excitation mode, additional asynchronous rotating magnetic field induction coupling brushless excitation technology etc.Adopt the scheme of the power supply of triple-frequency harmonics winding, the brushless excitation of controlled intermediate frequency resolver that a kind of exciting method and motor set structure form of novelty are provided for brushless excitation synchro wind generator group.
From domestic and foreign literature, the research of the synchro wind generator of triple-frequency harmonics winding power supply, controlled intermediate frequency resolver brushless excitation scheme still is in the starting stage.Before, utility model person design utilize rotating transformer structures that synchronous generator is carried out brushless excitation the time, adopted high frequency brushless excitation scheme, this brushless excitation system consists of the non-contact type electric energy transmission link with the rotary converter of tank shape magnetic core form major part realizes the brushless excitation of synchronous machine.But this type of high frequency scheme is applicable to the brushless excitation of synchro wind generator in theory, and for the large-scale wind powered generation syst of the larger excitation capacity of needs, the making of the high-frequency rotating transformer of tank shape core structure all has irrationality on cost and technique; Simultaneously, such scheme adopts the external dc power excitation, for high-power system, has reduced the stability of a system.
The utility model content
The purpose of this utility model is to provide a kind of motor set structure that is applicable to the high-power wind power generation field, and a kind of synchro wind generator brushless excitation scheme that has than strong system stability.
For achieving the above object, need to study and improve from aspects such as brushless structure and exciting methods, thereby so that the scheme of utilizing the non-contact type energy transfer mode to carry out brushless excitation is applicable to large-scale synchronous wind generating system, this will expand the application competitiveness of brushless excitation wind generator system, bring larger economy and social effect.
This triple-frequency harmonics power supply, controlled wind turbine generator of revolving change, its feature is comprised of following mode:
The salient pole synchronous main alternator by: three-phase first-harmonic winding, triple-frequency harmonics winding and excitation winding form; Wherein the three-phase output end of three-phase first-harmonic winding links to each other with system is outside; The three-phase output end of three-phase first-harmonic winding links to each other by the input of pi regulator with the driving pulse circuit for generating simultaneously, and the output of driving pulse circuit for generating links to each other with the control end of if inverter; The three-phase output end of triple-frequency harmonics winding links to each other with the input of if inverter through three-phase commutation bridge; The output of if inverter links to each other with the input of the intermediate frequency resolver of single-phase input three-phase output, and the output of the intermediate frequency resolver of single-phase input three-phase output links to each other with excitation winding through rotating rectifier; The input of if inverter also links to each other with the charge in batteries module.
According to above-mentioned triple-frequency harmonics power supply, the controlled exciting method that revolves the wind turbine generator of change, its feature comprises following process: the three-phase first-harmonic winding of installing in the main generator unit stator groove provides electric energy as the wind power generation output port to external electrical network or power consumption equipment; Simultaneously, three-phase first-harmonic winding need connect the driving pulse circuit for generating through pi regulator, and the pulse output of driving pulse circuit for generating is as the control signal of if inverter, thus control main generator excitation and output voltage.Remaining space in the main generator unit stator groove is laid the triple-frequency harmonics winding, the electric energy that winding induces produces the single-phase mid-frequency alternating current after three-phase commutation bridge and if inverter conversion, be connected to the former limit of the intermediate frequency resolver winding of single-phase input three-phase output, the mode of transmitting by the resolver non-contact type energy with electrical energy transfer to its secondary rotor three-phase winding, this three phase winding is connected to the rotor field coil of main generator after the rotating rectifier rectification, realize the brushless excitation of main generator; The charge in batteries module provides electric energy during for initial excitation, is connected in parallel on the input of if inverter, and storage battery is connected with diode, is blocked by diode behind Voltage Establishment.
The new topological structure that the utility model proposes is compared with existing topological structure, and maximum not being both changed the topological structure that non-contact type energy transmits in the brushless excitation link.In the former design, adopt the major part of the rotary converter formation non-contact type electric energy transmission link of high frequency tank shape magnetic core form, realized the brushless excitation of synchronous generator.But this type of high frequency scheme is for the large-scale wind powered generation syst of the larger excitation capacity of needs, and the making of tank shape rotary magnetic core all has irrationality on cost and technique.Simultaneously, such scheme adopts the external dc power excitation, and excitation capacity is restricted, and has reduced the stability of a system.And the topological structure that the utility model adopts the intermediate frequency resolver of the single-phase input three-phase output that is similar to wire-wound asynchronous motor to transmit as non-contact type energy, so that excitation capacity can design to tens kilowatts, and keep the electrical energy transfer efficient about 90%, simultaneously, the utility model has adopted this generator self-excitation scheme with feedback load characteristic of triple-frequency harmonics winding excitation, so that this brushless excitation wind power generation scheme is applicable to the high-power wind-driven generator group, this will expand the application competitiveness of brushless excitation synchro wind generator group.
Description of drawings
Fig. 1 is based on resolver brushless excitation MW level synchronous wind generating system architecture diagram
Fig. 2 is based on resolver brushless excitation MW level synchronous wind generating system mechanics structure chart
Number in the figure title: 1, main shaft, 2, the main generator bearing, 3, the main generator end cap, 4, the main generator outlet box, 5, the main generator rotor iron core, 6, the main generator unit stator iron core, 7, the main generator casing, 8, the triple-frequency harmonics winding, 9, three-phase first-harmonic winding, 10, excitation winding, 11, the main generator fan, 12, motor stator connects casing, 13, the resolver stator core, 14, the resolver rotor core, 15, rotating rectifier, 16, the resolver fan, 17, the resolver end cap, 18, the resolver outlet box, 19, the resolver rotor bearing, 20, resolver connects 21 with the main generator rotor keyway, the intermediate frequency resolver of single-phase input three-phase output, 22, if inverter, 23, the charge in batteries module, 24, pi regulator, 25 driving pulse circuit for generatings, 26, three-phase commutation bridge.
Embodiment
Narrate with reference to the accompanying drawings embodiment of the present utility model, operation principle and mechanical structure:
As shown in Figure 1, main generator in brushless wind power generating in this paper system new departure, version adopts salient pole electricity excitation synchronous generator, the main generator design capacity can reach the MW level, in main generator except three-phase first-harmonic winding, independently triple-frequency harmonics winding also is installed, its capacity is generally about 2% of main generator winding, take triple-frequency harmonics winding power supply self-excitation mode, but not common generator power winding shunt excitation mode, can avoid external fault (such as short circuit) to cause power failure and cause can not excitation problem; Third-harmonic component except excitation field, the triple-frequency harmonics winding can also be responded to the triple-frequency harmonics magnetic field of armature reacting field, bringing onto load is larger when main generator institute, armature reaction is stronger, the air-gap field wave distortion is just larger, third-harmonic component is also larger, so the carrying load ability of the electric energy that the triple-frequency harmonics electromotive force of induction provides after rectification is stronger, and the electromotive force size can reflect the load-carrying situation of change of main generator substantially.Be stressed that and compare from main winding shunt excitation power supply, the triple-frequency harmonics winding is not subjected to defeated out of order impact the (referring to that the voltage that the reason such as line short causes falls), the main winding power supply plan of encouraging oneself is more reliable than adopting, be more suitable for the wind power generation occasion, and the excitation electric energy that supplies can increase with the generator loading electric current, help and improve the excitation regulation rapidity.
Intermediate frequency resolver in brushless wind power generating in this paper system new departure is similar to the wound induction motor structure, be with the main distinction of traditional induction machine: 1, rotating shaft is not re-used as the port of output kinetic energy, but driven by the rotating shaft of main generator, its rotating speed is consistent with the main generator rotating speed, because the slip in rotor speed and intermediate frequency magnetic field is very large, so can substantially not consider rotation speed change; 2, the intermediate frequency three-phase voltage is exported in the induction of rotor winding, receives the rotating rectifier of rear class, is the power supply of main generator excitation winding; 3, resolver is powered by if inverter, the triple-frequency harmonics coil volume of both design capacities and main generator is close, the resolver of single-phase input three-phase output adopts the 0.35mm silicon steel sheet that adapts to intermediate frequency work, stator adopts the single phase alternating current (A.C.) winding, rotor adopts three-phase symmetrical to exchange winding, and need not similar general control all adopt the single phase alternating current (A.C.) winding with revolving the such rotor of change, so design can increase power density, reduce volume.
Control system in brushless wind power generating in this paper system new departure is with the main circuit of if inverter as excitation control, control strategy is selected PWM control, control system is according to given generator command voltage, detect simultaneously generator output voltage, the size of closed-loop adjustment if inverter pulse-width modulation output voltage equivalent amplitude value, thereby change the inner impulsive magnetic field size of intermediate frequency resolver, thereby the size of the exciting voltage that change resolver induction output voltage is exported, thereby reach the purpose of controlling the main generator excitation electric current after rectification.Storage battery provides electric energy during for initial excitation, and by the diode blocking-up, the control board of converter (weak current part) is also by storage battery power supply behind Voltage Establishment.
As shown in Figure 2, because native system utilizes resolver to carry out transformation of electrical energy, so part as brushless excitation system, the rotor of resolver is installed on the elongated end of rotating shaft of main generator, so that main generator and excitation resolver rotor speed are synchronous, place the diode circuit plate of rotating rectifier at the axle head of resolver side, rotate with axle, the groove that the rotating rectifier output lead mills out in advance along the axle surface is arranged, is connected to the main generator excitation winding.Opening end cap is rotating rectifier convenient to check and maintenance, also needs to reserve certain axial space to rotating rectifier bolt type diode when the design end cap.Aspect bearing; the axle head that resolver is installed adopts duplex bearing; main generator adopts high-power bearing on request; the resolver stator also arranges a bearing by self end cap and rotating shaft place; its stator is fixedly connected with main generator; it is inner that the main generator rotating shaft is stretched in the resolver rotating shaft; connect with main generator by spline; wire casing on two machine shafts also is conducted by circular guide holes simultaneously; so that resolver rotor winding can be connected with the main generator excitation winding, the guide hole outer cover has protective sleeve.Above Machine Design can prevent because of the spacious amount of bearing wear excessive, and beating of main generator axle alters into the possible thorax fault of sweeping to revolving of small air gap.
Claims (1)
1. triple-frequency harmonics power supply, controlled wind turbine generator of revolving change, its feature is comprised of following mode:
The salient pole synchronous main alternator by: three-phase first-harmonic winding (9), triple-frequency harmonics winding (8) and main shaft (1) form; Wherein the three-phase output end of three-phase first-harmonic winding (9) links to each other with system is outside; The three-phase output end of three-phase first-harmonic winding (9) links to each other with the input of driving pulse circuit for generating (25) by pi regulator (24) simultaneously, and the output of driving pulse circuit for generating (25) links to each other with the control end of if inverter (22); The three-phase output end of triple-frequency harmonics winding (8) links to each other with the input of if inverter (22) through three-phase commutation bridge (26); The output of if inverter (22) links to each other with the input of the intermediate frequency resolver (21) of single-phase input three-phase output, and the output of the intermediate frequency resolver (21) of single-phase input three-phase output links to each other with excitation winding (10) through rotating rectifier (15); The input of if inverter (22) also links to each other with charge in batteries module (23).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220248423 CN202663349U (en) | 2012-05-30 | 2012-05-30 | Wind power generating unit with third harmonic power supply and controlled rotary transformation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220248423 CN202663349U (en) | 2012-05-30 | 2012-05-30 | Wind power generating unit with third harmonic power supply and controlled rotary transformation |
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| CN202663349U true CN202663349U (en) | 2013-01-09 |
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| CN 201220248423 Withdrawn - After Issue CN202663349U (en) | 2012-05-30 | 2012-05-30 | Wind power generating unit with third harmonic power supply and controlled rotary transformation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710201A (en) * | 2012-05-30 | 2012-10-03 | 南京航空航天大学 | Third harmonic power supply and controlled rotary transformation wind power generating unit as well as brushless excitation method |
| RU2704313C1 (en) * | 2018-11-26 | 2019-10-28 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный энергетический университет" (ФГБОУ ВО "КГЭУ") | System for boosting excitation of self-contained synchronous generator included in electrical system, using energy accumulators based on storage batteries and high-power supercapacitors |
| RU2738159C1 (en) * | 2020-05-27 | 2020-12-10 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный энергетический университет" | Combined system of start-up and smoothing of loads graphs of group of independent gas-piston and diesel-generator sets using high-capacity accumulator batteries |
-
2012
- 2012-05-30 CN CN 201220248423 patent/CN202663349U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710201A (en) * | 2012-05-30 | 2012-10-03 | 南京航空航天大学 | Third harmonic power supply and controlled rotary transformation wind power generating unit as well as brushless excitation method |
| CN102710201B (en) * | 2012-05-30 | 2014-10-15 | 南京航空航天大学 | Third harmonic power supply and controlled rotary transformation wind power generating unit as well as brushless excitation method |
| RU2704313C1 (en) * | 2018-11-26 | 2019-10-28 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный энергетический университет" (ФГБОУ ВО "КГЭУ") | System for boosting excitation of self-contained synchronous generator included in electrical system, using energy accumulators based on storage batteries and high-power supercapacitors |
| RU2738159C1 (en) * | 2020-05-27 | 2020-12-10 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный энергетический университет" | Combined system of start-up and smoothing of loads graphs of group of independent gas-piston and diesel-generator sets using high-capacity accumulator batteries |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130109 Effective date of abandoning: 20141015 |
|
| RGAV | Abandon patent right to avoid regrant |