CN107968426B - Dehumidification and temperature rise method of double-fed wind driven generator - Google Patents
Dehumidification and temperature rise method of double-fed wind driven generator Download PDFInfo
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- CN107968426B CN107968426B CN201610915532.7A CN201610915532A CN107968426B CN 107968426 B CN107968426 B CN 107968426B CN 201610915532 A CN201610915532 A CN 201610915532A CN 107968426 B CN107968426 B CN 107968426B
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- Prior art keywords
- fed wind
- double
- generator
- driven generator
- wind driven
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- 238000007791 dehumidification Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Images
Classifications
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- H02J3/386—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/007—Control circuits for doubly fed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a dehumidification and temperature rise method of a double-fed wind driven generator, which is characterized in that for the grid-connected no-load operation of the double-fed wind driven generator, a main controller limits the active power of the double-fed wind driven generator to be zero, and the heat generated by the no-load loss of the double-fed wind driven generator is utilized to heat a unit, so that the dehumidification and temperature rise of the unit are realized simultaneously in the heating process. The doubly-fed wind generator is in grid-connected no-load operation, the no-load loss is about 1% of the rated power of an engine, for example, a 2.0MW unit, the no-load loss is 20kW, compared with the heater in the prior art, the power is large, and correspondingly, the heat generated by the no-load loss is increased, so that the dehumidification and temperature rise time of the doubly-fed wind generator unit can be effectively shortened.
Description
Technical Field
The invention relates to the technical field of generators, in particular to a dehumidification and temperature rise method of a double-fed wind driven generator.
Background
Under the condition of long-time shutdown or over-low environmental temperature, when the double-fed wind generating set is started, in order to avoid the influence on the insulation and the service life of a winding due to the fact that a generator winding is damped or the temperature is too low, the winding and a base space are generally heated by a heater in the prior art, and the purposes of dehumidifying and improving the winding temperature are achieved.
Due to the limitation of the space and the structure of the double-fed wind generating set, the power of the heater can only reach 2kw, the power is low, the heating time is long, the dehumidifying and heating speeds are slow, and the operation of the double-fed wind generating set is seriously influenced.
Therefore, how to shorten the dehumidification and temperature rise time of the doubly-fed wind turbine generator system becomes a technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of this, the invention provides a dehumidification and temperature rise method for a doubly-fed wind generator, so as to shorten the dehumidification and temperature rise time of the doubly-fed wind generator.
In order to achieve the purpose, the invention provides the following technical scheme:
a dehumidification and temperature rise method of a doubly-fed wind generator comprises the following steps:
1) starting a double-fed wind driven generator to enable the double-fed wind driven generator to reach a grid-connected condition;
2) and synchronously merging the double-fed wind driven generator into a power grid, and enabling the active power of the double-fed wind driven generator to be zero through a main controller of the double-fed wind driven generator, so that the double-fed wind driven generator is heated by utilizing heat generated by no-load loss of the double-fed wind driven generator.
Preferably, in the dehumidification and temperature rise method of the doubly-fed wind power generator, the time of the doubly-fed wind power generator during grid-connected no-load operation is 10-15 min.
According to the technical scheme, the dehumidification and temperature rise method of the double-fed wind driven generator provided by the invention has the advantages that the double-fed wind driven generator is connected to the power grid in a no-load mode, the main controller limits the active power of the double-fed wind driven generator to be zero, the heat generated by the no-load loss of the double-fed wind driven generator is utilized to heat the unit, and the dehumidification and temperature rise of the unit are realized simultaneously in the heating process. The doubly-fed wind generator is in grid-connected no-load operation, the no-load loss is about 1% of the rated power of an engine, for example, a 2.0MW unit, the no-load loss is 20kW, compared with the heater in the prior art, the power is large, and correspondingly, the heat generated by the no-load loss is increased, so that the dehumidification and temperature rise time of the doubly-fed wind generator unit can be effectively shortened.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a dehumidification and temperature rise method for a doubly-fed wind turbine provided in an embodiment of the present invention.
Detailed Description
The invention discloses a dehumidification and temperature rise method of a double-fed wind driven generator, which aims to shorten the dehumidification and temperature rise time of the double-fed wind driven generator.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of a dehumidification and temperature rise method for a doubly-fed wind turbine according to an embodiment of the present invention.
The invention discloses a dehumidification and temperature rise method of a double-fed wind driven generator, which comprises the following steps:
1) starting the doubly-fed wind driven generator to enable the doubly-fed wind driven generator to reach a grid-connected condition;
2) the double-fed wind driven generator is synchronously connected into a power grid, the active power of the double-fed wind driven generator is zero through the main controller of the double-fed wind driven generator, and the double-fed wind driven generator is heated by utilizing heat generated by no-load loss of the double-fed wind driven generator.
The grid connection condition of the doubly-fed wind generator is as follows:
1. the frequency of the generator is the same as the system frequency;
2. the outlet voltage of the generator is the same as the system voltage, and the maximum error of the generator is within 5%;
3. the phase sequence of the generator is the same as that of the system;
4. the generator voltage phase coincides with the system voltage phase.
After the generator is connected to the grid, the engine is actually in a grid-connected no-load running state, the main controller controls the active power of the doubly-fed wind driven generator to be zero, the no-load power is about 1% of the rated power of the generator, the no-load power mainly comprises generator iron loss, mechanical loss and a small amount of copper loss, heat generated by the iron loss and the copper loss can be used for heating a generator winding, the mechanical loss is mainly caused by wind abrasion during air circulation inside the generator, and the winding can be uniformly heated through air circulation.
The generator is incorporated into the power networks no-load operation, and no-load loss is about 1% of generator rated power, like 2.0MW unit, no-load loss is about 20KW, for the heater among the prior art, the heat that no-load loss produced is many more, can shorten double-fed wind generating set's dehumidification and intensification time greatly, and the winding heating is even simultaneously, has improved the reliability that double-fed wind generating set dehumidified and intensification, has solved double-fed wind generating set and has heated the standby and problem that can not start for a long time.
When the doubly-fed wind generator is in no-load operation, the voltage of the rotor is only 1/6-1/4 of the rotor opening voltage, so that the safety of grid-connected no-load operation of the doubly-fed wind generator is guaranteed.
In order to reduce the cost of the dehumidification and temperature rise method of the double-fed wind driven generator, the grid-connected no-load running time of the double-fed wind driven generator is controlled within 10-15min, the dehumidification and temperature rise of the winding can be effectively realized in the time period, and the risks of reduction of the insulation performance of the winding and shortening of the service life caused by the fact that the generator is affected with damp or the environment temperature is too low are reduced.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A dehumidification and temperature rise method of a doubly-fed wind generator comprises the following steps:
1) starting a doubly-fed wind driven generator, and modulating the doubly-fed wind driven generator to enable the doubly-fed wind driven generator to reach a grid-connected condition;
2) the double-fed wind driven generator is synchronously connected into a power grid, the active power of the double-fed wind driven generator is enabled to be zero through a main controller of the double-fed wind driven generator, the double-fed wind driven generator is heated by utilizing the heat generated by the no-load loss of the double-fed wind driven generator, the heat generated by the no-load loss mainly comprises the iron loss, the mechanical loss and the copper loss of the generator, the heat generated by the iron loss and the copper loss can be used for heating a winding of the generator, the mechanical loss is mainly caused by wind abrasion during the circulation of air in the generator, and the winding can be uniformly heated through the circulation of the air,
the time of the grid-connected no-load operation of the doubly-fed wind generator is 10-15 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915532.7A CN107968426B (en) | 2016-10-20 | 2016-10-20 | Dehumidification and temperature rise method of double-fed wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915532.7A CN107968426B (en) | 2016-10-20 | 2016-10-20 | Dehumidification and temperature rise method of double-fed wind driven generator |
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| Publication Number | Publication Date |
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| CN107968426A CN107968426A (en) | 2018-04-27 |
| CN107968426B true CN107968426B (en) | 2021-06-15 |
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| CN201610915532.7A Active CN107968426B (en) | 2016-10-20 | 2016-10-20 | Dehumidification and temperature rise method of double-fed wind driven generator |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01282464A (en) * | 1988-05-10 | 1989-11-14 | Chubu Electric Power Co Inc | Moisture measuring device |
| CN201425001Y (en) * | 2009-06-09 | 2010-03-17 | 上海万德风力发电股份有限公司 | 1.5-MW permanent magnet direct-drive wind-driven power generator unit |
| CN102996343B (en) * | 2012-11-27 | 2015-01-07 | 华锐风电科技(集团)股份有限公司 | Wind turbine generator control method, wind turbine generator control device and wind turbine generator control system |
| CN103107757B (en) * | 2013-01-24 | 2015-05-13 | 北京天诚同创电气有限公司 | Method for heating wind driven generator by using full-power converter |
| CN203114514U (en) * | 2013-03-17 | 2013-08-07 | 南京风电科技有限公司 | Low-temperature starting control device of wind turbine generator system |
| CN103195652B (en) * | 2013-04-11 | 2015-03-11 | 国电联合动力技术有限公司 | Low-temperature start control method for wind generating set |
| CN105526046B (en) * | 2014-10-27 | 2018-05-15 | 南车株洲电力机车研究所有限公司 | Wind power generating set low temperature no-load running heating control system and method |
| CN104600926A (en) * | 2015-01-09 | 2015-05-06 | 北京天诚同创电气有限公司 | Generator online heating system and method of wind generating set |
| CN104901492B (en) * | 2015-05-14 | 2017-09-01 | 北京天诚同创电气有限公司 | Moisture drying and heating control method and system of wind driven generator |
| CN105257473A (en) * | 2015-11-10 | 2016-01-20 | 四川东方电气自动控制工程有限公司 | Low-temperature quick starting control method of wind turbine generator |
| CN107783038B (en) * | 2016-08-26 | 2020-11-27 | 中国船舶重工集团海装风电股份有限公司 | Method, device and system for testing efficiency of doubly-fed wind generator |
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