CN107347003B - Method and device for automatically switching communication lines and wind generating set - Google Patents
Method and device for automatically switching communication lines and wind generating set Download PDFInfo
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- CN107347003B CN107347003B CN201610292886.0A CN201610292886A CN107347003B CN 107347003 B CN107347003 B CN 107347003B CN 201610292886 A CN201610292886 A CN 201610292886A CN 107347003 B CN107347003 B CN 107347003B
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- 230000006854 communication Effects 0.000 title claims abstract description 245
- 238000004891 communication Methods 0.000 title claims abstract description 243
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010248 power generation 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
- 238000013024 troubleshooting Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/328—Blade pitch angle
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Eletrric Generators (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a method and a device for automatically switching communication lines and a wind generating set. A method for automatically switching communication lines is applicable to a first device of a wind generating set, and comprises the following steps: the first device simultaneously transmits a first status word to the second device via the master communication line and the slave communication line; the first device receives a second status word which is simultaneously returned by the second device through the main communication line and the slave communication line; the first device judges whether the first status word and the second status word transmitted through the master communication line and the slave communication line are consistent, and automatically switches the communication lines according to the judgment result. The invention solves the problem of automatic switching use of the master-slave communication circuit in the communication system of the wind generating set.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a method and a device for automatically switching communication lines and a wind generating set.
Background
With the increasing development of energy crisis and environmental crisis, wind power generation technology has been rapidly developed as a clean energy technology. The main controller of the wind generating set is usually in communication connection with the four systems of the wind generating set through a PROFIBUS communication protocol or a CAN bus protocol.
In the communication process of the main controller and the four systems, if a communication line is strongly interfered or interrupted, the unit is shut down to ensure the safety of the unit. Because communication troubleshooting and line restoration take longer time, a slave communication line is usually installed in a communication system in the wind turbine generator system for maintaining and replacing the original line. However, in the prior art, the slave communication line of the communication system of the wind generating set does not access the communication system simultaneously with the master communication line, and further, the problem of automatic switching between the master communication line and the slave communication line in the communication system of the wind generating set is solved.
Disclosure of Invention
In view of the above problems, the present invention provides a method and an apparatus for automatically switching communication lines, and a wind turbine generator system, so as to solve the problem of automatic switching between master and slave communication lines in a communication system of a wind turbine generator system.
In order to solve the above technical problem, according to a first aspect of the present invention, there is provided a method for automatically switching communication lines, the method being applied to a first device of a wind turbine generator system, when the first device is a main controller, a second device of the wind turbine generator system is any one of a tower-based controller, a nacelle controller, a converter or a pitch control system, and when the first device is any one of the tower-based controller, the nacelle controller, the converter or the pitch control system, the second device is the main controller; a master communication line and a slave communication line are installed between the first device and the second device in parallel, and the method for automatically switching the communication lines comprises the following steps:
the first device simultaneously transmitting a first status word to the second device via the master communication line and the slave communication line;
the first device receives a second status word returned by the second device through the master communication line and the slave communication line simultaneously;
the first device judges whether the first status word and the second status word transmitted through the main communication line are consistent or not;
if the communication information is consistent with the communication information of the main communication line, the first device adopts the communication information of the main communication line;
if not, when the first device judges that the first status word and the second status word transmitted through the slave communication line are consistent, the first device automatically switches to the slave communication line and adopts the communication information of the slave communication line.
Preferably, the method further comprises the following steps:
and when the first device judges that the first state word and the second state word transmitted through the slave communication line are inconsistent, the first device confirms that the communication is invalid and counts the time or the frequency of the communication invalidation.
Preferably, after the first device counts the time or the number of communication failures, the method further includes:
the first device judges whether the time or the frequency of the communication failure is larger than a corresponding preset value; if the communication between the first device and the second device is failed, the communication between the first device and the second device is lost, and the wind generating set stops.
Preferably, the predetermined time for the communication failure is 200 milliseconds.
Preferably, the predetermined number of communication failures is 10.
According to a second aspect of the present invention, there is provided a device for automatically switching communication lines, which is suitable for a first device of a wind turbine generator system, wherein when the first device is a main controller, a second device of the wind turbine generator system is any one of a tower-based controller, a nacelle controller, a converter or a pitch control system, and when the first device is any one of the tower-based controller, the nacelle controller, the converter or the pitch control system, the second device is the main controller; a master communication line and a slave communication line are installed between the first device and the second device in parallel, and the device for automatically switching the communication lines comprises:
a transmitting unit for simultaneously transmitting a first status word to the second device via the master communication line and the slave communication line;
a receiving unit, configured to receive a second status word that is returned by the second device via the master communication line and the slave communication line at the same time;
a first judging unit configured to judge whether the first status word and the second status word transmitted via the main communication line are identical;
a first executing unit, configured to enable the first device to use the communication information of the main communication line when the determination result of the first determining unit is consistent;
a second judging unit configured to judge whether the first status word and the second status word transmitted via the slave communication line are identical when the judgment result of the first judging unit is not identical;
and the second execution unit is used for automatically switching the first device to the slave communication line and adopting the communication information of the slave communication line when the judgment result of the second judgment unit is consistent.
Preferably, the method further comprises the following steps:
and the counting unit is used for confirming the communication failure by the first device and counting the time or the frequency of the communication failure when the judgment result of the second judgment unit is inconsistent.
Preferably, the method further comprises the following steps:
the comparison unit is used for judging whether the communication failure time or frequency is greater than a corresponding preset value;
and the third execution unit is used for executing the shutdown of the wind generating set when the judgment result of the comparison unit is greater than the judgment result of the comparison unit, and the communication between the first device and the second device is lost.
According to a third aspect of the present invention, there is provided a wind turbine generator set comprising: a main controller, a tower footing controller, a nacelle controller, a converter and a pitch system, wherein the main controller, the tower footing controller, the nacelle controller, the converter and the pitch system are provided with devices having an automatic switching communication line according to any one of the second aspect.
Compared with the prior art, the two communication lines are simultaneously and parallelly installed between the first device and the second device which are communicated with each other in the wind generating set, the device which is used for communication in the wind generating set can automatically judge whether the communication content is effective or not by adding the status word, and further, when the master communication line and the slave communication line are used simultaneously, the automatic switching of the communication lines can be realized.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a method for automatically switching a communication line according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for automatically switching communication lines according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a connection structure between a first device and a second device according to an embodiment of the present invention;
FIG. 4 is a wind turbine generator system according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for automatically switching a communication line according to a third embodiment of the present invention.
Detailed Description
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.
The terms "first" and "second," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
Example one
Referring to fig. 1, a schematic flow chart of a method for automatically switching communication lines according to a first embodiment of the present invention is shown, where the method is applied to a first device of a wind turbine generator system, when the first device is a main controller, a second device of the wind turbine generator system is any one of a tower-based controller, a nacelle controller, a converter and a pitch control system, and when the first device is any one of the tower-based controller, the nacelle controller, the converter and the pitch control system, the second device is the main controller; referring to fig. 3, a main communication line and a slave communication line are installed between the first device and the second device in parallel, and a specific connection manner is shown, two communication lines, namely a main communication line 303 and a slave communication line 304, are installed between a first device 301 and a second device 302 in parallel, the first device 301 and the second device 302 communicate with each other through the main communication line 303 or the slave communication line 304, and the method for automatically switching the communication lines specifically includes the following steps:
step 101: after the first device simultaneously sends a first status word to the second device via the master communication line and the slave communication line, the process goes to step 102;
in step 101, the status word is a status flag word added to a communication protocol of each device communicating with each other, and the status flag word may be similar to a heartbeat signal or other accumulated number signal that can be used to determine the status of a communication line.
Step 102: after receiving a second status word returned by the second device through the master communication line and the slave communication line, the first device proceeds to step 103;
the second device receives the information with the first status word sent by the first device, puts the status word into feedback information, and transmits the feedback information to the first device through the main communication line and the slave communication line at the same time, and then the first device receives the feedback information with the second status word returned by the second device through the two communication lines.
Step 103: the first device judges whether the first state word and the second state word transmitted through the main communication line are consistent, if so, the step 104 is carried out, and if not, the step 105 is carried out;
step 104: the first device adopts the communication information of the main communication line;
step 105: the first device determines whether the first status word and the second status word transmitted via the communication line are consistent, and if so, the method proceeds to step 106;
step 106: the first device automatically switches to a slave communication line, and communication information of the slave communication line is adopted.
The method for automatically switching the communication line provided by the first embodiment of the present invention is described by taking the first device of the wind turbine generator system as an example, and similarly, the second device of the wind turbine generator system may also automatically switch the communication line when communicating with the first device by using the method.
In the method for automatically switching communication lines provided in the first embodiment of the present invention, the first device can determine whether the sent status word is consistent with the received status word by adding the status word to the communication information communicated with the second device, so as to determine the credibility of the communication information transmitted by the communication line.
Further, after step 106, the method further includes:
step 107: when the first device judges that the first state word and the second state word transmitted through the slave communication line are inconsistent, the first device confirms that the communication is invalid and counts the time or the frequency of the communication invalidation;
the first device counts the time or the frequency of communication failure, which is performed after the communication between the first device and the second device through the two communication lines fails, and the time or the frequency of communication failure can be counted at the same time, namely the time of communication failure and the frequency of communication failure counted by the first device are counted by the first device; the time or the number of communication failures may also be counted separately, that is, the first device counts the time of the communication failures, or the first device counts the number of the communication failures, and the specific content of the first device counting the communication failures in the embodiment of the present invention is not limited.
Further, after step 107, the method further includes:
step 108: the first device judges whether the time or the frequency of the communication failure is larger than a corresponding preset value; if yes, go to step 109;
in the technical scheme of the invention, the preset value of the communication failure time is preferably 200 milliseconds; the preset value of the number of times of communication failures is 10 times. However, the predetermined value may be an exact value or a range of values, which is a preset value mainly according to a specific communication device in the wind turbine generator system, and the specific value or range of values of the predetermined value is set according to different actual situations, and the predetermined value is not specifically limited in the embodiment of the present invention.
Step 109: and the communication between the first device and the second device is failed, the communication between the first device and the second device is lost, and the wind generating set is stopped.
Example two
Referring to fig. 2, a schematic structural diagram of a device for automatically switching communication lines according to a second embodiment of the present invention is shown, where the device is suitable for a first device of a wind turbine generator system, when the first device is a main controller, a second device of the wind turbine generator system is any one of a tower-based controller, a nacelle controller, a converter and a pitch control system, and when the first device is any one of the tower-based controller, the nacelle controller, the converter and the pitch control system, the second device is the main controller; a master communication line and a slave communication line are installed in parallel between the first device and the second device, and for a specific connection relationship between the first device and the second device, please refer to fig. 3 and the explanation in the first embodiment of the present invention, which is not described herein again. The device for automatically switching the communication line specifically comprises:
a receiving unit 201, configured to receive a second status word returned by the second device via the master communication line and the slave communication line at the same time;
a first determining unit 202, configured to determine whether the first status word and the second status word transmitted through the main communication line are consistent;
a first executing unit 203, configured to enable the first device to adopt the communication information of the main communication line when the determination result of the first determining unit 202 is consistent;
a second judging unit 204, configured to judge whether the first status word and the second status word transmitted via the slave communication line are consistent when the judgment result of the first judging unit 202 is inconsistent;
a second executing unit 205, configured to, when the determination result of the second determining unit 204 is consistent, automatically switch the first device to the slave communication line, and use the communication information of the slave communication line.
In the device for automatically switching a communication line provided in the second embodiment of the present invention, whether communication information of the master communication line is trusted is mainly determined by determining, by a first determining unit, whether a first status word sent by the first device to the second device via the master communication line is consistent with a received second status word returned by the second device, and when the communication information of the master communication line is not trusted, the second determining unit determines whether communication information of the slave communication line is trusted by using the same determining method, and if the communication information is trusted, the slave communication line is automatically switched to, thereby implementing automatic switching of the communication line.
Further, in some embodiments of the present invention, the apparatus for automatically switching a communication line may further include:
a counting unit 206, configured to, when the determination result of the second determining unit is inconsistent, the first device confirms that the communication is failed, and counts time or frequency of the communication failure.
It should be noted that, the counting unit 206 counts the time or the number of times of communication failure, which is performed after both the first device and the second device fail to communicate via the two communication lines, and the time or the number of times of communication failure may be counted at the same time, that is, the counting unit 206 counts the time of communication failure and counts the number of times of communication failure; the time or the number of times of the communication failure may also be counted separately, that is, the time of the communication failure is counted, or the number of times of the communication failure is counted.
Further, the apparatus further comprises:
a comparing unit 207, configured to determine whether the time or the number of times of the communication failure is greater than a corresponding predetermined value;
it should be noted that the predetermined value set in the comparing unit 207 may be an exact value or a value range, and is a value preset mainly according to a specific communication device in the wind turbine generator system, and the specific value or the value range of the predetermined value is set according to different actual situations, and the predetermined value is not specifically limited in the embodiment of the present invention.
And a third executing unit 208, configured to, when the determination result of the comparing unit is greater than the predetermined threshold, perform shutdown of the wind turbine generator system if the communication between the first device and the second device is lost.
Referring to fig. 4, an embodiment of the present invention further provides a wind turbine generator system, including: the main controller 401, the tower footing controller 402, the nacelle controller 403, the converter 404, and the pitch system 405, where the main controller 401, the tower footing controller 402, the nacelle controller 403, the converter 404, and the pitch system 405 are all provided with devices for automatically switching communication lines according to the description in the second embodiment of the present invention, for which reference is specifically made to the second embodiment of the present invention, which is not described herein again.
EXAMPLE III
In the third embodiment, mainly taking a communication process between a main controller and a cabin controller of a wind turbine as an example, a main communication line and a slave communication line are installed in parallel between the main controller and the cabin controller, and specifically, refer to fig. 5, which is a schematic flow chart of a method for automatically switching communication lines provided by the third embodiment of the present invention, and the method includes the following steps:
step 501: after the master controller simultaneously sends a first status word to the cabin controller through the master communication line and the slave communication line, the method goes to step 502;
step 502: after receiving a second status word returned by the cabin controller through the master communication line and the slave communication line at the same time, the master controller proceeds to step 503;
step 503: the main controller judges whether the first state word and the second state word transmitted through the main communication line are consistent, if so, the step 504 is carried out, and if not, the step 505 is carried out;
step 504: the main controller adopts the communication information of the main communication line;
step 505: the master controller determines whether the first status word and the second status word transmitted through the slave communication line are consistent, and if so, the process goes to step 506;
step 506: and the master controller automatically switches to the slave communication line and adopts the communication information of the slave communication line.
In the method for automatically switching the communication line between the main controller and the cabin controller of the wind turbine provided in the third embodiment of the present invention, the main controller adds the status word to the communication information communicated with the cabin controller, and further determines whether the sent status word is consistent with the received status word, so as to determine the credibility of the communication information transmitted by the communication line, and thus the main controller can realize automatic switching of the communication line when using the master-slave communication line.
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 (9)
1. A method for automatically switching communication lines is characterized in that the method is applicable to a first device of a wind generating set, when the first device is a main controller, a second device of the wind generating set is any one of a tower-based controller, a cabin controller, a current transformer or a variable pitch system, and when the first device is any one of the tower-based controller, the cabin controller, the current transformer or the variable pitch system, the second device is the main controller; a master communication line and a slave communication line are installed between the first device and the second device in parallel, and the method for automatically switching the communication lines comprises the following steps:
the first device simultaneously transmitting a first status word to the second device via the master communication line and the slave communication line;
the first device receives a second status word returned by the second device through the master communication line and the slave communication line simultaneously;
the first device judges whether the first status word and the second status word transmitted through the main communication line are consistent;
if the communication information is consistent with the communication information of the main communication line, the first device adopts the communication information of the main communication line;
if not, when the first device judges that the first status word and the second status word transmitted through the slave communication line are consistent, the first device automatically switches to the slave communication line and adopts the communication information of the slave communication line.
2. The method of claim 1, further comprising:
and when the first device judges that the first state word and the second state word transmitted through the slave communication line are inconsistent, the first device confirms that the communication is invalid and counts the time or the frequency of the communication invalidation.
3. The method of claim 2, wherein after the first device counts the time or number of communication failures, further comprising:
the first device judges whether the time or the frequency of the communication failure is larger than a corresponding preset value; if the communication between the first device and the second device is failed, the communication between the first device and the second device is lost, and the wind generating set stops.
4. The method of claim 3, wherein the predetermined time of communication failure is 200 milliseconds.
5. The method of claim 3, wherein the predetermined number of communication failures is 10.
6. A device for automatically switching communication lines is characterized by being applicable to a first device of a wind generating set, wherein when the first device is a main controller, a second device of the wind generating set is any one of a tower-based controller, a cabin controller, a current transformer or a variable pitch system, and when the first device is any one of the tower-based controller, the cabin controller, the current transformer or the variable pitch system, the second device is the main controller; a master communication line and a slave communication line are installed between the first device and the second device in parallel, and the device for automatically switching the communication lines comprises:
a transmitting unit for simultaneously transmitting a first status word to the second device via the master communication line and the slave communication line;
a receiving unit, configured to receive a second status word that is returned by the second device via the master communication line and the slave communication line at the same time;
a first judging unit configured to judge whether the first status word and the second status word transmitted via the main communication line are identical;
a first executing unit, configured to enable the first device to use the communication information of the main communication line when the determination result of the first determining unit is consistent;
a second judging unit configured to judge whether the first status word and the second status word transmitted via the slave communication line are identical when the judgment result of the first judging unit is not identical;
and the second execution unit is used for automatically switching the first device to the slave communication line and adopting the communication information of the slave communication line when the judgment result of the second judgment unit is consistent.
7. The apparatus of claim 6, further comprising:
and the counting unit is used for confirming the communication failure by the first device and counting the time or the frequency of the communication failure when the judgment result of the second judgment unit is inconsistent.
8. The apparatus of claim 7, further comprising:
the comparison unit is used for judging whether the communication failure time or frequency is greater than a corresponding preset value;
and the third execution unit is used for executing the shutdown of the wind generating set when the judgment result of the comparison unit is greater than the judgment result of the comparison unit, and the communication between the first device and the second device is lost.
9. A wind turbine generator set, comprising: the main controller, the tower footing controller, the cabin controller, the converter and the pitch system are all provided with the device for automatically switching the communication lines, wherein the device for automatically switching the communication lines is as claimed in any one of claims 6 to 8.
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| CN112145370B (en) * | 2020-09-04 | 2021-11-02 | 上海电气风电集团股份有限公司 | Communication quality detection method, system and readable storage medium |
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| CN102959900A (en) * | 2011-06-22 | 2013-03-06 | 三菱重工业株式会社 | Remote monitoring device, power generation system, and remote monitoring device control method |
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