CN103595073B - A kind of Wind turbines and Wind turbines overcome the method for grid fluctuations affect - Google Patents
A kind of Wind turbines and Wind turbines overcome the method for grid fluctuations affect Download PDFInfo
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- CN103595073B CN103595073B CN201310604353.8A CN201310604353A CN103595073B CN 103595073 B CN103595073 B CN 103595073B CN 201310604353 A CN201310604353 A CN 201310604353A CN 103595073 B CN103595073 B CN 103595073B
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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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Abstract
The invention discloses a kind of Wind turbines and method that Wind turbines overcomes grid fluctuations affect, Wind turbines includes main power circuit and accessory power supply loop；Described accessory power supply loop there are PLC and multiple subsystem access；Isolated by full power convertor between electromotor and electrical network；Regulated power supply is installed between single-phase or three phase mains electric power system and Wind turbines accessory power supply loop；Power network monitoring module is accessed in Wind turbines accessory power supply loop, isolated by regulated power supply between electric component and the electrical network in accessory power supply loop；When electrical network occur long-time, on a large scale after fluctuation, the Wind turbines buffer action by being arranged in main power circuit full power convertor so that the electric energy of electromotor still can be fed in electrical network, eliminates the power network fluctuation impact on feeding electric energy；By the buffer action of regulated power supply installed in accessory power supply loop so that Wind turbines 400V high voltage system remain to properly functioning.
Description
Technical field
The present invention relates to a kind of motor and the method overcoming power network fluctuation, particularly relate to a kind of Wind turbines and method that Wind turbines overcomes grid fluctuations affect
Background technology
Wind energy is big as a kind of amount of containing, pollute little new cleaning fuel, is more and more utilized at present, and the proportion that Wind turbines is linked in electrical network is gradually increased, and can Wind turbines stable operation be related to whether electrical network stable and the load of electrical network.When power network fluctuation, Wind turbines should possess stronger conformability, does not disengage with electrical network to keep the stable operation of self, and continues feeding active power and reactive power to electrical network.
By the impact of the factor such as geographical position and power transmission line, the electrical network voltage and frequency fluctuation in some region is bigger, for instance shown in table 1.
Some regional power grid operational factor of table 1
General Wind turbines can adapt to the power network fluctuation in normal range, but for the comparatively serious area of power network fluctuation, conventional Wind turbines can not stable operation, be in particular in:
1. the electric energy that electromotor sends can not be fed in electrical network；
2. generation is fluctuated by the auxiliary power supply system power supply of Wind turbines: driftage, change oar and other loop are by cisco unity malfunction；
3. Wind turbines will due to disorderly closedown.
The operational factor requirement more harsh for solving power network fluctuation, inventor invents a kind of method that Wind turbines overcomes grid fluctuations affect so that it is can adapt to line voltage and frequency fluctuates on a large scale for a long time.
Summary of the invention
For solving problem above, the invention provides a kind of method that Wind turbines overcomes grid fluctuations affect, have be adapted on a large scale, the advantage of long-time power network fluctuation, simultaneously, adopting said method, it is possible to reduce the proportion of goods damageds of mechanical part, improves the Wind turbines life-span.
It is suitable for be in the bigger electrical network of various fluctuation, electrical network end and off-network type Wind turbines type, it is with a wide range of applications.
To achieve these goals, the technical solution used in the present invention is:
A kind of Wind turbines, including main power circuit and accessory power supply loop；Described accessory power supply loop there are PLC and multiple subsystem access；
Wind turbines main power circuit accesses electromotor, is isolated by full power convertor between electromotor and electrical network；
Regulated power supply is installed between single-phase or three phase mains electric power system and Wind turbines accessory power supply loop；
Power network monitoring module is accessed in Wind turbines accessory power supply loop, isolated by regulated power supply between electric component and the electrical network in accessory power supply loop；
Further, the described multiple subsystems accessed in accessory power supply loop include yaw system, pitch-controlled system, cooling system；
The described Wind turbines of application overcomes the method for grid fluctuations affect to be:
When power network fluctuation or generation electrical network are asymmetric, electromotor is carried out excitation con-trol by full power convertor, the output electric energy rectification of electromotor and inversion are processed, making the amplitude of generator output voltage, frequency consistent with the amplitude of line voltage, frequency and phase angle with phase angle, motor still operates in symmetry status；
After line voltage fluctuates; power network monitoring module real-time sampling on-Line Voltage; voltage signal is sent to PLC; PLC summary responses also send protection unit instruction; regulated power supply is accessed accessory power supply loop; voltage magnitude is compensated by regulated power supply with the response speed of 10～30ms, output amplitude, frequency stable voltage；
The built-in Control System Software of PLC, carries out monitoring in real time, controls in real time main power circuit and accessory power supply loop, completes Wind turbines driftage, becomes oar and refrigerating function, makes Wind turbines stable operation.
The invention have the benefit that after fluctuation long-time, large-scale occurs electrical network, the Wind turbines buffer action by being arranged in main power circuit full power convertor, the electric energy making electromotor still can be fed in electrical network, eliminates the power network fluctuation impact on feeding electric energy；By the buffer action of regulated power supply installed in accessory power supply loop so that Wind turbines 400V high voltage system remain to properly functioning.
The method that a kind of Wind turbines of the present invention overcomes grid fluctuations affect, Wind turbines is made to can adapt to the big frequency of line voltage, on a large scale, fluctuate for a long time, can pass through from controlling after fluctuation, self-regulation maintains steady operational status, solves that the power network fluctuation caused due to environmental factors is excessive and the difficult problem that causes Wind turbines to disengage with electrical network.
Accompanying drawing explanation
The present invention has accompanying drawing 3 width；
Fig. 1 is the topology diagram of Wind turbines of the prior art；
Fig. 2 is the topology diagram of Wind turbines of the present invention；
Fig. 3 is the operational flow diagram of the present invention.
Detailed description of the invention
The present invention is further described in conjunction with the drawings and the specific embodiments.
A kind of Wind turbines, including main power circuit and accessory power supply loop；Described accessory power supply loop there are PLC and multiple subsystem access；
Wind turbines main power circuit accesses electromotor, is isolated by full power convertor between electromotor and electrical network；
Regulated power supply is installed between single-phase or three phase mains electric power system and Wind turbines accessory power supply loop；
Power network monitoring module is accessed in Wind turbines accessory power supply loop, isolated by regulated power supply between electric component and the electrical network in accessory power supply loop；
Further, the described multiple subsystems accessed in accessory power supply loop include yaw system, pitch-controlled system, cooling system；
The described Wind turbines of application overcomes the method for grid fluctuations affect to be:
When power network fluctuation or generation electrical network are asymmetric, electromotor is carried out excitation con-trol by full power convertor, the output electric energy rectification of electromotor and inversion are processed, making the amplitude of generator output voltage, frequency consistent with the amplitude of line voltage, frequency and phase angle with phase angle, motor still operates in symmetry status；
After line voltage fluctuates; power network monitoring module real-time sampling on-Line Voltage; voltage signal is sent to PLC; PLC summary responses also send protection unit instruction; regulated power supply is accessed accessory power supply loop; voltage magnitude is compensated by regulated power supply with the response speed of 10～30ms, output amplitude, frequency stable voltage；
The built-in Control System Software of PLC, carries out monitoring in real time, controls in real time main power circuit and accessory power supply loop, completes Wind turbines driftage, becomes oar and refrigerating function, makes Wind turbines stable operation.
Main power circuit is made up of full power convertor, grid-connected chopper and electromotor, rotation function is converted to electric energy and is fed to electrical network by main power circuit, bigger electrical network is fluctuated and stable operation, it is necessary to full power convertor and corresponding assembly thereof are carried out parameter spread in order to make Wind turbines can adapt to；
Wind turbines controls programming procedure:
(1) for the design of electric power loop, increase power network monitoring module, in real time monitoring power network fluctuation state, add and control output point and feedback test point, detection line voltage state and regulated power supply output voltage state accordingly；
(2) design the state machine of unit operation, the state that line voltage or frequency fluctuation amplitude is bigger, increase the corresponding control strategy of controller；
(3) for the requirement of the bigger operation of power networks that adapts to fluctuate; need the interrelated logic in control system of wind turbines and parameter are optimized, for instance electric network protection logic and parameter, current transformer relay protective scheme and parameter, power control logic and parameter, pitch control logic and parameter and complete machine Protection parameters etc..
Claims (1)
1. the method that a Wind turbines overcomes grid fluctuations affect, it is characterised in that comprise the following steps:
When a, power network fluctuation or generation electrical network are asymmetric, electromotor is carried out excitation con-trol by full power convertor, the output electric energy rectification of electromotor and inversion are processed, making the amplitude of generator output voltage, frequency consistent with the amplitude of line voltage, frequency and phase angle with phase angle, motor still operates in symmetry status；
After b, line voltage fluctuate; power network monitoring module real-time sampling on-Line Voltage; voltage signal is sent to PLC; PLC summary responses also send protection unit instruction; regulated power supply is accessed accessory power supply loop; voltage magnitude is compensated by regulated power supply with the response speed of 10 ~ 30ms, output amplitude, frequency stable voltage；
The built-in Control System Software of c, PLC, carries out monitoring in real time, controls in real time main power circuit and accessory power supply loop, completes Wind turbines driftage, becomes oar and refrigerating function, makes Wind turbines stable operation；
Described Wind turbines, including main power circuit and accessory power supply loop；Described accessory power supply loop there are PLC and multiple subsystem access, it is characterised in that: in Wind turbines main power circuit, access electromotor, isolated by full power convertor between electromotor and electrical network；Regulated power supply is installed between single-phase or three phase mains electric power system and Wind turbines accessory power supply loop；Power network monitoring module being accessed in Wind turbines accessory power supply loop, isolated by regulated power supply between electric component and the electrical network in accessory power supply loop, rotation function is converted to electric energy and is fed to electrical network by main power circuit；The described multiple subsystems accessed in accessory power supply loop include yaw system, pitch-controlled system, cooling system；
Wind turbines controls programming procedure:
(1) control output point and feedback test point, detection line voltage state and regulated power supply output voltage state are added；
(2) design the state machine of unit operation, the state that line voltage or frequency fluctuation amplitude is bigger, increase the corresponding control strategy of controller；
(3) interrelated logic in control system of wind turbines and parameter being optimized, described interrelated logic and parameter include electric network protection logic and parameter, current transformer relay protective scheme and parameter, power control logic and parameter, pitch control logic and parameter and complete machine Protection parameters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310604353.8A CN103595073B (en) | 2013-11-23 | 2013-11-23 | A kind of Wind turbines and Wind turbines overcome the method for grid fluctuations affect |
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| CN201310604353.8A CN103595073B (en) | 2013-11-23 | 2013-11-23 | A kind of Wind turbines and Wind turbines overcome the method for grid fluctuations affect |
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| CN103595073A CN103595073A (en) | 2014-02-19 |
| CN103595073B true CN103595073B (en) | 2016-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3316437A1 (en) * | 2016-10-26 | 2018-05-02 | MHI Vestas Offshore Wind A/S | Providing auxiliary power when a high-voltage link is nonfunctional |
| CN106549614B (en) * | 2016-12-12 | 2019-01-22 | 科诺伟业风能设备（北京）有限公司 | A kind of wind generating set pitch control is away from system power network fluctuation guard method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007124780A (en) * | 2005-10-27 | 2007-05-17 | Hitachi Industrial Equipment Systems Co Ltd | Power storage system and wind power station |
| CN102882230A (en) * | 2012-09-21 | 2013-01-16 | 上海交通大学 | Wind electricity-based electric energy quality series compensator |
| CN103256175A (en) * | 2012-02-17 | 2013-08-21 | 周登荣 | Wind energy utilization system |
| CN103580029A (en) * | 2012-07-31 | 2014-02-12 | 华锐风电科技(集团)股份有限公司 | Control system and method of power supply loop of wind generating set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2166225B1 (en) * | 2008-09-19 | 2016-08-10 | Vestas Wind Systems A/S | A wind park having an auxiliary power supply |
| CN101873072B (en) * | 2010-06-24 | 2012-05-23 | 太原理工大学 | Three-phase digital power supply device for mines |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007124780A (en) * | 2005-10-27 | 2007-05-17 | Hitachi Industrial Equipment Systems Co Ltd | Power storage system and wind power station |
| CN103256175A (en) * | 2012-02-17 | 2013-08-21 | 周登荣 | Wind energy utilization system |
| CN103580029A (en) * | 2012-07-31 | 2014-02-12 | 华锐风电科技(集团)股份有限公司 | Control system and method of power supply loop of wind generating set |
| CN102882230A (en) * | 2012-09-21 | 2013-01-16 | 上海交通大学 | Wind electricity-based electric energy quality series compensator |
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