CN102231529A - Method for controlling switchover-free grid connection of double-fed wind driven generator - Google Patents
Method for controlling switchover-free grid connection of double-fed wind driven generator Download PDFInfo
- Publication number
- CN102231529A CN102231529A CN2011101511640A CN201110151164A CN102231529A CN 102231529 A CN102231529 A CN 102231529A CN 2011101511640 A CN2011101511640 A CN 2011101511640A CN 201110151164 A CN201110151164 A CN 201110151164A CN 102231529 A CN102231529 A CN 102231529A
- Authority
- CN
- China
- Prior art keywords
- rotor current
- incorporated
- closed loop
- power networks
- stator voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The invention relates to a method for controlling switchover-free grid connection of a double-fed wind driven generator. In the method, a stator flux linkage directional vector control method is adopted, and rotor current and stator voltage before grid connection are both controlled by a closed loop regulator. In cooperation with a voltage closed loop, the control strategies before and after grid connection are consistent. The method has the beneficial effects that firstly, rotor current regulator parameters and coupling item calculation modes do not need to be switched; and secondly, compared with the traditional control method, the method has a simplified control process, thus the method is easy for engineering implementation, is more concise and more reliable.
Description
Technical field
The invention belongs to technical field of wind power generation, particularly double-fed wind power generator does not have the switching grid-connected control method.
Background technology
Variable speed constant frequency doubly-fed in recent years type wind power generation becomes the focus that new energy field is paid close attention to, and it is widely used in the high-power wind power generation, and its good variable speed constant frequency characteristic has improved wind energy utilization.The rotor current transformer is less because of only needing to handle the slip power capacity; Under vector decoupling zero control, the characteristics of its flexible reactive power can improve network system stability.
The frequency of double feedback electric engine stator voltage, amplitude, phase place must be adjusted to identical with electrical network to realize that not having impact is incorporated into the power networks by the rotor current transformer.At present the double feedback electric engine control strategy that is incorporated into the power networks is generally chosen stator voltage vector or stator magnetic linkage vector oriented, realizes decoupling zero control under the effect that controller is regulated.Motor mathematical model difference before and after owing to be incorporated into the power networks, its vector control coupling terms form is also different with the current regulator parameter.Generally before and after being incorporated into the power networks, coupling terms and current regulator parameter are switched (as shown in Figure 1).But the problem that switching brings is that secondly the at first reality difficult acquisition of switching instant accurately carries out coupling terms in the control and the switching of PI parameter is more loaded down with trivial details.
Summary of the invention
The present invention is directed to above-mentioned defective discloses and has proposed double-fed wind power generator and do not have the switching grid-connected control method.It may further comprise the steps:
Step 1: according to double feedback electric engine parameter designing rotor current adjuster, double feedback electric engine time constant after the integration time constant of adjustment rotor current adjuster equals to be incorporated into the power networks, the ratio time constant is determined according to the rotor current closed-loop bandwidth, remains unchanged before and after above-mentioned two time constants are incorporated into the power networks;
Step 2: the coupling terms account form is written as the back account form that is incorporated into the power networks, remains unchanged before and after this account form is incorporated into the power networks;
Step 3: design be incorporated into the power networks predetermination electronic voltage regulator and parameter thereof are designed to the time constant of stator voltage closed loop to ignore the dynamic process of rotor current closed loop than the big order of magnitude of rotor current closed loop time constant;
Step 4: start rotor current closed-loop control and stator voltage closed-loop control simultaneously, the instruction of stator voltage closed loop slowly rises to rated value with constant speed, the rotor current closed loop is then followed the output of stator voltage closed loop, exciting current rises to rated value synchronously, and the amplitude of motor stator voltage, frequency, phase place are close to line voltage gradually;
Step 5: closed stator voltage close loop after amplitude, frequency, the phase place of motor stator voltage and line voltage is all identical;
Step 6: motor stator is connected to electrical network, and the operating process of being incorporated into the power networks finishes.
Beneficial effect of the present invention comprises: at first, rotor current regulator parameter and coupling terms account form do not need to switch.Secondly, with traditional control method simplified in comparison control procedure, be easy to Project Realization, more succinct more reliable.
Description of drawings
Fig. 1 is traditional double-fed wind power generator control strategy block diagram that is incorporated into the power networks
Fig. 2 switches the control strategy block diagram that is incorporated into the power networks for double-fed wind power generator does not have
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are specified:
As shown in Figure 2, double-fed wind power generator does not have and switches grid-connected control method and may further comprise the steps:
Step 1: according to double feedback electric engine parameter designing rotor current adjuster, double feedback electric engine time constant after the integration time constant of adjustment rotor current adjuster equals to be incorporated into the power networks, the ratio time constant is determined according to the rotor current closed-loop bandwidth, remains unchanged before and after above-mentioned two time constants are incorporated into the power networks;
Step 2: the coupling terms account form is written as the back account form that is incorporated into the power networks, remains unchanged before and after this account form is incorporated into the power networks;
Step 3: design be incorporated into the power networks predetermination electronic voltage regulator and parameter thereof are designed to the time constant of stator voltage closed loop to ignore the dynamic process of rotor current closed loop than the big order of magnitude of rotor current closed loop time constant;
Step 4: start rotor current closed-loop control and stator voltage closed-loop control simultaneously, the instruction of stator voltage closed loop slowly rises to rated value with constant speed, the rotor current closed loop is then followed the output of stator voltage closed loop, exciting current rises to rated value synchronously, and the amplitude of motor stator voltage, frequency, phase place are close to line voltage gradually;
Step 5: closed stator voltage close loop after amplitude, frequency, the phase place of motor stator voltage and line voltage is all identical;
Step 6: motor stator is connected to electrical network, and the operating process of being incorporated into the power networks finishes.
Claims (1)
1. double-fed wind power generator does not have the switching grid-connected control method, it is characterized in that, may further comprise the steps:
Step 1: according to double feedback electric engine parameter designing rotor current adjuster, double feedback electric engine time constant after the integration time constant of adjustment rotor current adjuster equals to be incorporated into the power networks, the ratio time constant is determined according to the rotor current closed-loop bandwidth, remains unchanged before and after above-mentioned two time constants are incorporated into the power networks;
Step 2: the coupling terms account form is written as the back account form that is incorporated into the power networks, remains unchanged before and after this account form is incorporated into the power networks;
Step 3: design be incorporated into the power networks predetermination electronic voltage regulator and parameter thereof are designed to the time constant of stator voltage closed loop to ignore the dynamic process of rotor current closed loop than the big order of magnitude of rotor current closed loop time constant;
Step 4: start rotor current closed-loop control and stator voltage closed-loop control simultaneously, the instruction of stator voltage closed loop slowly rises to rated value with constant speed, the rotor current closed loop is then followed the output of stator voltage closed loop, exciting current rises to rated value synchronously, and the amplitude of motor stator voltage, frequency, phase place are close to line voltage gradually;
Step 5: closed stator voltage close loop after amplitude, frequency, the phase place of motor stator voltage and line voltage is all identical;
Step 6: motor stator is connected to electrical network, and the operating process of being incorporated into the power networks finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101511640A CN102231529A (en) | 2011-06-07 | 2011-06-07 | Method for controlling switchover-free grid connection of double-fed wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101511640A CN102231529A (en) | 2011-06-07 | 2011-06-07 | Method for controlling switchover-free grid connection of double-fed wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102231529A true CN102231529A (en) | 2011-11-02 |
Family
ID=44844074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101511640A Pending CN102231529A (en) | 2011-06-07 | 2011-06-07 | Method for controlling switchover-free grid connection of double-fed wind driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102231529A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162168A (en) * | 2015-10-15 | 2015-12-16 | 国家电网公司 | Wind generator system grid connection control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797936A (en) * | 2004-12-20 | 2006-07-05 | 卢骥 | Torque control method for frequency control of asynchronous motor with no speed sensor |
| CN100424988C (en) * | 2003-07-15 | 2008-10-08 | 歌美飒创新技术公司 | Control and protection of a doubly-fed induction generator system |
| US20090206606A1 (en) * | 2007-12-28 | 2009-08-20 | Vestas Wind Systems A/S | Variable Speed Wind Turbine Configured For Wind Farm Operation |
| CN201733269U (en) * | 2010-05-20 | 2011-02-02 | 浙江省电力试验研究院 | Double-fed wind driven generator control system |
-
2011
- 2011-06-07 CN CN2011101511640A patent/CN102231529A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424988C (en) * | 2003-07-15 | 2008-10-08 | 歌美飒创新技术公司 | Control and protection of a doubly-fed induction generator system |
| CN1797936A (en) * | 2004-12-20 | 2006-07-05 | 卢骥 | Torque control method for frequency control of asynchronous motor with no speed sensor |
| US20090206606A1 (en) * | 2007-12-28 | 2009-08-20 | Vestas Wind Systems A/S | Variable Speed Wind Turbine Configured For Wind Farm Operation |
| CN201733269U (en) * | 2010-05-20 | 2011-02-02 | 浙江省电力试验研究院 | Double-fed wind driven generator control system |
Non-Patent Citations (9)
| Title |
|---|
| 《中国电机工程学报》 20061031 郎永强等 交流励磁双馈电机分段并网控制策略 1 第26卷, 第19期 * |
| 《中国电机工程学报》 20070630 杨淑英等 变速恒频双馈风力发电机投切控制策略 1 第27卷, 第17期 * |
| 《太阳能学报》 20041031 赵栋利等 变速恒频风力双馈发电机并网电压控制研究 1 第25卷, 第5期 * |
| 《电力自动化设备》 20110228 方太勋等 基于电压闭环的双馈风力发电软切入控制 90-93 1 第31卷, 第2期 * |
| 《科技广场》 20091130 李艳秀等 双馈发电机并网后功率控制策略研究 1 , 第11期 * |
| GERARDO TAPIA,MIKEL TELLERIA: "Methodlogy for smooth connection of doubly fed induction generators to the grid", 《IEEE TRANSTIONS ON ENERGY CONVERSION》 * |
| 侯勇，童建东: "基于积分型变结构控制器的双馈风力发电机并网控制", 《电工技术学报增刊2》 * |
| 杨淑英，张兴，张崇巍，谢震，曹仁贤: "变频恒速双馈风力发电机投切控制策略", 《中国电机工程学报》 * |
| 王中，孙元章，李国杰，黎雄: "双馈风力发电矢量控制电流环参数特性分析", 《电力系统自动化》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162168A (en) * | 2015-10-15 | 2015-12-16 | 国家电网公司 | Wind generator system grid connection control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chen et al. | Analysis of squirrel-cage induction generator with Vienna rectifier for wind energy conversion system | |
| CN102074967B (en) | Method for controlling energy storage type wind power station with synchronization property | |
| Fernández et al. | Operating capability as a PQ/PV node of a direct-drive wind turbine based on a permanent magnet synchronous generator | |
| Bu et al. | An excitation-capacitor-optimized dual stator-winding induction generator with the static excitation controller for wind power application | |
| CN108429289B (en) | Control method and system based on virtual synchronous generator | |
| CN107968415B (en) | Self-adaptive virtual inertia control method of virtual synchronous generator | |
| CN102255586B (en) | Constant power wide speed regulation control method for permanent magnet synchronous motor | |
| CN105811825A (en) | Current compensation based power decoupling method of virtual synchronous power generator | |
| CN109980670A (en) | A kind of double-fed wind energy converter direct current bus voltage control method | |
| CN102497154A (en) | Method for avoiding shutdown of frequency converter under instantaneous power-down situation | |
| CN101719678B (en) | No-load cutting-in modeling and experimental method of double-fed type wind-driven generator | |
| CN202455089U (en) | Megawatt-grade direct-driven type mouse cage asynchronous generator AC-DC-AC wind power generation system | |
| CN101499665A (en) | Idle grid connection control method for speed variant frequency constant dual feedback asynchronous wind power generator set | |
| Wang et al. | Principle and control strategy of pulse width modulation rectifier for hydraulic power generation system | |
| Pimple et al. | New direct torque control of DFIG under balanced and unbalanced grid voltage | |
| CN106816889B (en) | Gird-connected inverter power decoupled method and device | |
| Abo-Khalil et al. | Loss minimization control for doubly-fed induction generators in variable speed wind turbines | |
| Xu et al. | General average model of D-PMSG and its application with virtual inertia control | |
| CN102097812A (en) | Wind generating set and reactive power control method thereof | |
| CN102231529A (en) | Method for controlling switchover-free grid connection of double-fed wind driven generator | |
| CN102006003A (en) | Three-phase asynchronous motor economizer | |
| Hanmei et al. | Increasing output power of switched reluctance generator with three-level power converter | |
| Li | Modeling and simulation of micro gas turbine generation system for grid connected operation | |
| Aouani et al. | Control strategy of a variable speed wind energy conversion system based on a Doubly Fed Induction Generator | |
| Yan et al. | Study on an optimum design for DC and doubly-controlled DFIG system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111102 |