CN113586332A - Safe operation control system of wind generating set - Google Patents
Safe operation control system of wind generating set Download PDFInfo
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- CN113586332A CN113586332A CN202010362513.2A CN202010362513A CN113586332A CN 113586332 A CN113586332 A CN 113586332A CN 202010362513 A CN202010362513 A CN 202010362513A CN 113586332 A CN113586332 A CN 113586332A
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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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- 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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Abstract
The invention discloses a wind generating set safe operation control system, which comprises: the variable pitch control system comprises a plurality of variable pitch control units, each variable pitch control unit comprises a first relay and a variable pitch driver, and the first relay comprises a coil and a first contact group; coils of the first relays of the variable pitch control units are connected in parallel to an external safety chain of a variable pitch system of the wind generating set, and the first contact groups of the first relays of the variable pitch control units are connected with the emergency stop enabling ends of the corresponding variable pitch drivers; and the coil of the first relay of each variable pitch control unit is powered off under the condition that the external safety chain is disconnected, so that the first contact group of the variable pitch control unit is disconnected, the emergency stop enabling end is configured to receive a first feedback signal, and the variable pitch driver is configured to drive the corresponding variable pitch motor to execute emergency feathering when the first feedback signal indicates that the first contact group of the corresponding first relay is disconnected. By adopting the embodiment of the invention, the blades can be feathered to a safe position in an emergency manner to complete braking under the condition of failure of the variable pitch controller.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a safe operation control system of a wind generating set.
Background
The variable pitch system is an important functional component of the wind generating set. Generally, a pitch system is incorporated into a master control safety chain (also referred to as an external safety chain of the pitch system) of a wind turbine generator system, and when the external safety chain is disconnected, a pitch controller in the pitch system starts an emergency feathering function and sends a speed command to a pitch driver, so that the pitch driver drives a pitch motor to work according to the speed command, and the blades are braked from emergency feathering to a safe position.
However, the variable pitch controller may fail in the using process, and under the condition that the variable pitch driver fails, the variable pitch controller cannot send a speed command to the variable pitch driver, and at this time, the variable pitch driver cannot drive the variable pitch motor to work, which easily causes the problem of pitch jam and affects the safe operation of the wind generating set.
Disclosure of Invention
The embodiment of the invention provides a safe operation control system of a wind generating set, which can emergently feather blades to a safe position to complete braking under the condition that a variable pitch controller fails.
In a first aspect, an embodiment of the present invention provides a wind turbine generator system safety operation control system, where the wind turbine generator system safety operation control system includes: a plurality of pitch control units, each pitch control unit comprising a first relay and a pitch drive, the first relay comprising a coil and a first set of contacts;
coils of the first relays of the variable pitch control units are connected in parallel to an external safety chain of a variable pitch system of the wind generating set, and the first contact group of the first relay of each variable pitch control unit is connected with an emergency stop enabling end of the corresponding variable pitch driver;
the coil of the first relay of each pitch control unit is powered off under the condition that the external safety chain is disconnected, so that the first contact group of the first relay is disconnected, the emergency stop enabling end is configured to receive a first feedback signal, the first feedback signal is used for indicating the execution state of the first contact group corresponding to the first relay, and the pitch driver is configured to drive the corresponding pitch motor to execute emergency feathering when the first feedback signal indicates that the first contact group corresponding to the first relay is disconnected.
In a second aspect, an embodiment of the present invention provides a wind turbine generator system, including: the safe operation control system of the wind generating set is described above.
In the safe operation control system of the wind generating set in the embodiment of the invention, the first contact group of the first relay in each variable pitch control unit is connected with the emergency stop enabling end of the corresponding variable pitch driver, so that each variable pitch driver can perform emergency feathering according to the feedback signal which is received by the emergency stop enabling end and indicates that the first contact group of the first relay is disconnected after the first contact group corresponding to the first relay is disconnected, that is, the variable pitch driver can perform emergency feathering without depending on a speed command issued by the variable pitch controller, and therefore, even if the variable pitch controller fails, the variable pitch driver corresponding to the variable pitch controller can also feather the blades to a safe position to complete braking, thereby ensuring the safe operation of the wind generating set.
Drawings
The present invention will be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings, in which like or similar reference characters designate like or similar features.
Fig. 1 is a schematic structural diagram of a safe operation control system of a wind generating set according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a first relay according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second relay according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a safe operation control system of a wind turbine generator system according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a third relay according to an embodiment of the present invention.
Description of reference numerals:
101-shaft 1 variable pitch control unit; 102-shaft 2 pitch control unit;
103-shaft 3 pitch control unit; 104-external security chain; 105-internal safety chain;
20SK1 — first relay; a1 — coil of first relay;
11/12-first set of contacts of the first relay; 21/22-second set of contacts of the first relay;
p11 — first signal input of first relay;
20SK2 — second relay; a2 — coil of second relay;
13/14-first set of contacts of a second relay; 23/24-second set of contacts of a second relay;
p21 — first signal input of second relay;
p22 — second signal input of second relay;
20SK3 — third relay; a3 — coil of third relay;
15/16-first set of contacts of a third relay; 25/26-second set of contacts of third relay;
d1-scram enable terminal.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention.
The wind generating set safety chain includes: an outer safety chain and an inner safety chain of the pitch system.
The external safety chain of the variable pitch system is also called a master control safety chain, all fault nodes which can seriously damage the wind generating set can be connected in series to form a loop, and any fault node acts to cause the power failure of the whole external safety chain loop, so that the wind generating set enters an emergency stop state. The fault node involved in the external safety chain of the pitch system comprises: the emergency shutdown device comprises an emergency shutdown button (located in a tower bottom main control cabinet), a generator overspeed module, a cable twisting switch, an external safety relay (namely a first relay 20SK1) in three shaft control cabinets of a variable pitch system, the emergency shutdown button (located in a cabin control cabinet), a vibration switch and the like.
Fig. 1 schematically illustrates an external safety chain of a pitch system, and the external safety chain 104 shown in fig. 1 is connected in series by a vibration switch 3S1, a safety relay 128K4, a first relay 20SK1 corresponding to the shaft 1-shaft 3, and an overspeed switch 3S 2. The coils (a1) of the shafts 1 to 3 corresponding to the first relay 20SK1 are connected in series in parallel to the external safety chain 104. Any fault node action can cause the whole external safety chain 104 loop to be powered off, and further causes the coils (A1) of the first relays 20SK1 corresponding to the three shafts to be powered off simultaneously, so that the wind generating set enters an emergency stop state.
When the wind generating set is in emergency shutdown, the variable-pitch controller can generate an emergency feathering instruction and send the emergency feathering instruction to the corresponding variable-pitch driver, so that the corresponding variable-pitch driver drives the corresponding variable-pitch motor to perform emergency feathering according to the emergency feathering instruction. Illustratively, the emergency feathering instruction comprises a given value of the pitch speed, and the given value of the pitch speed is gradually reduced to 0 from the emergency feathering to the completion of the feathering, wherein the type causing the emergency shutdown fault of the wind generating set is not limited.
However, the pitch controller may also be in failure during use, and under the condition that the pitch driver is in failure, the pitch controller cannot send a speed command to the corresponding pitch driver, and at this time, the pitch driver cannot drive the corresponding pitch motor to work, which easily causes a problem of pitch jam and affects safe operation of the wind turbine generator system.
Based on the above, the embodiment of the invention provides a wind generating set safe operation control system, which is used for controlling a safety chain related to a variable pitch system of a wind generating set. Referring to fig. 1, the safe operation control system of the wind turbine generator system includes: a plurality of pitch control units.
Fig. 1 shows pitch control units corresponding to three blade axes, which are respectively: the variable pitch control units of the shaft 1, the shaft 2 and the shaft 3 are independently arranged and are not communicated with each other, and the variable pitch control units can be respectively and integrally arranged in a shaft control cabinet.
Each pitch control unit comprises: a first relay 20SK1 and a pitch drive. The first relay 20SK1 in each pitch control unit comprises a coil (A1) and a first contact group (11/12), the coil (A1) of the first relay 20SK1 in each pitch control unit is connected in parallel to an external safety chain 104 of a pitch system of the wind generating set, the first contact group (11/12) of the first relay 20SK1 in each pitch control unit is connected with an emergency stop enabling end D1 of a corresponding pitch driver, and the pitch drivers corresponding to three blade shafts are shown in FIG. 1 and respectively: shaft 1 pitch drive, shaft 2 pitch drive and shaft 3 pitch drive.
The coil (a1) of the first relay 20SK1 of each pitch control unit is de-energized in case the external safety chain 104 is open, causing a corresponding opening of the first set of contacts (11/12) of the corresponding first relay 20SK 1.
The scram enable terminal D1 of each pitch drive is configured to receive a first feedback signal for indicating an execution status of the first contact set (11/12) of the corresponding first relay 20SK 1. For example, when the first contact set (11/12) of the first relay 20SK1 is closed, the first feedback signal is a high level signal, and when the first contact set (11/12) of the first relay 20SK1 is open, the first feedback signal is a low level signal.
Each pitch drive is configured to drive the corresponding pitch motor to perform emergency feathering when the first feedback signal indicates that the first contact set (11/12) corresponding to the first relay 20SK1 is disconnected, that is, each pitch drive can perform autonomous feathering according to the first feedback signal received by the emergency stop enabling end D1, and when the pitch is autonomously feathered, a feathering parameter may be prestored in the pitch drive and called when the pitch is emergently feathered, and the feathering parameter may be a pitch speed.
As described above, since the first contact group (11/12) of the first relay 20SK1 in each pitch control unit is connected to the emergency stop enabling end D1 of the corresponding pitch drive, each pitch drive can perform emergency feathering according to the feedback signal indicating that the first contact group (11/12) of the first relay 20SK1 is disconnected, which is received by the emergency stop enabling end D1, after the first contact group (11/12) of the corresponding first relay 20SK1 is disconnected, that is, the pitch drive can perform emergency feathering without depending on the speed command issued by the pitch controller, and therefore, even if the pitch controller fails, the pitch drive corresponding to the pitch controller can perform emergency feathering of the blade to a safe position to complete braking, thereby ensuring safe operation of the wind turbine generator set.
In some embodiments, a limit switch, such as an 87-degree position limit switch, is disposed on a path along which each blade rotates, the limit switch is connected to a corresponding pitch drive, and each pitch drive is further configured to stop feathering according to a received trigger signal of the limit switch, so that the blade stops at the 87-degree position and does not continue to feather towards a large angle. In the example of fig. 1, the shaft 1 pitch drive, the shaft 2 pitch drive and the shaft 3 pitch drive each show input ports S1 and S2 for signals of two limit switches, which have the same function, and in case of damage of one limit switch, the pitch drive can still stop feathering using the trigger signal of the other limit switch.
The first relay 20SK1 of each pitch control unit shown in fig. 1 further comprises a second set of contacts (21/22), each pitch control unit further comprising: and the variable pitch controllers are a shaft 1 variable pitch controller, a shaft 2 variable pitch controller and a shaft 3 variable pitch controller respectively. The second contact set (21/22) of the first relay 20SK1 of each pitch control unit is connected to the corresponding pitch controller. Each pitch controller is configured to receive a second feedback signal indicative of an execution state of a second set of contacts (21/22) of the corresponding first relay 20SK 1.
Since the second contact group (21/22) of the first relay 20SK1 and the first contact group (11/12) of the first relay are consistent in action and are opened or closed simultaneously, the execution state of the first relay 20SK1 can be fed back to the pitch controller through the second contact group (21/22), so that the pitch controller can monitor the execution state of the first relay 20SK1 and upload the execution state of the first relay 20SK1 to a higher-level controller (such as a master controller), complete safety loop verification of safety feedback-safety execution results can be achieved, and data support is provided for analysis and positioning of the pitch system fault reasons.
Fig. 1 also gives a brief illustration of the internal safety chain of the pitch system. The internal safety chain 105 shown in fig. 1 is formed by connecting in series the first contact sets (13/14) of the second relays 20SK2 corresponding to the shafts 1 to 3. The opening of the first set of contacts (13/14) of the second relay 20SK2 on either axis causes the entire internal safety chain 105 loop to be de-energized.
Each pitch control unit shown in fig. 1 further comprises a second relay 20SK2, the second relay 20SK2 comprises a coil (a2) and a first contact set (13/14), the coil (a2) of the second relay 20SK2 of each pitch control unit is connected with the corresponding pitch controller, and the first contact set (13/14) of the second relay 20SK2 of each pitch control unit is serially connected into the internal safety chain 105 of the pitch system.
Each pitch controller is configured to control the coil (a2) of the corresponding second relay 20SK2 to be de-energized to open the first contact set (13/14) of the corresponding second relay 20SK2 to disconnect the internal safety chain 105 when the received second feedback signal indicates that the second contact set (21/22) of the corresponding first relay 20SK1 is open.
In this embodiment, if the pitch controller receives a feedback signal indicating that the second contact set (21/22) corresponding to the first relay 20SK1 is open, it indicates that the first contact set (11/12) and the coil (a1) corresponding to the first relay 20SK1 are both open, i.e., the external safety chain 104 is open. Because the priority and the execution speed of the hardware safety chain are higher than those of software control, after the external safety chain 104 is disconnected for a period of time, the internal safety chain 105 may still be in a connected state, at this time, the pitch controller controls the coil (A2) of the second relay 20SK2 to be powered off according to the received feedback signal indicating that the second contact group (21/22) corresponding to the first relay 20SK1 is disconnected, the internal safety chain 105 can be disconnected, so that the interlocking control of the external safety chain 104 and the internal safety chain 105 of the pitch system can be realized, further, the related protection measures for disconnecting the internal safety chain 105 can be executed in time, and the operation safety of the wind generating set is further ensured.
The second relay 20SK2 of each pitch control unit shown in fig. 1 further comprises a second set of contacts (23/24), the second set of contacts (23/24) of the second relay 20SK2 of each pitch control unit being connected to the corresponding pitch controller. Each pitch controller is further configured to receive a third feedback signal for indicating an execution state of a second set of contacts (23/24) of the corresponding second relay 20SK 2.
Since the second contact group (23/24) of the second relay 20SK2 is consistent with the action of the first contact group (13/14) thereof, and the second contact group (3826) thereof is opened or closed at the same time, the execution state of the second relay 20SK2 can be fed back to the corresponding pitch controller through the second contact group (23/24) thereof, so that the corresponding pitch controller can monitor the execution state of the second relay 20SK2, and upload the execution state of the second relay 20SK2 to a higher-level controller (such as a master controller), thereby being capable of realizing complete safety loop verification of safety feedback-safety execution results, and providing data support for analysis and positioning of fault reasons of the pitch system.
Fig. 2 is a schematic structural diagram of the first relay 20SK1 according to the embodiment of the present invention, and as can be seen from fig. 2, the first relay 20SK1 includes a first signal input terminal P11 in addition to the coil (a1), the first contact set (11/12), and the second contact set (21/22).
Wherein, the first signal input end P11 of the first relay 20SK1 of each pitch control unit is also connected with the corresponding pitch controller, and each pitch controller is further configured to send a first control signal to the first signal input end P11 of the corresponding first relay 20SK1 to enable the corresponding first relay 20SK1 to control the coil (a1) thereof to be powered off according to the first control signal to disconnect the external safety chain 104 when the received third feedback signal indicates that the second contact set (23/24) of the corresponding second relay 20SK2 is disconnected.
In this embodiment, if the pitch controller receives a feedback signal indicating that the second set of contacts (23/24) corresponding to the second relay 20SK2 is open, it indicates that the internal safety chain 105 of the pitch system has been opened. Since the hardware safety chain has a higher priority and execution speed than the software control, the outer safety chain 104 of the pitch system may still be in the on state after the inner safety chain 105 of the pitch system has been switched off for a while, at this time, the pitch controller sends a control signal for powering off a coil (A1) of the first relay 20SK1 to a first signal input end P11 corresponding to the first relay 20SK1 according to the received feedback signal for indicating that a second contact group (23/24) corresponding to the second relay 20SK2 is disconnected, so that the coil (A1) of the first relay 20SK1 is controlled to be powered off, the external safety chain 104 can be disconnected, and the interlocking control of the internal safety chain 105 and the external safety chain 104 of the pitch system can be realized, therefore, the related protection measures for disconnecting the external safety chain 104 of the variable pitch system can be executed in time, and the operation safety of the wind generating set is ensured.
In some embodiments, the wind turbine generator set safe operation control system further includes a master control controller (not shown in the figure), the master control controller is connected with the pitch controllers in the pitch control units, each pitch controller is configured to forward the received third feedback signal to the master control controller, the master control controller is configured to receive the third feedback signal forwarded by each pitch controller, and the outer safety chain 104 is disconnected when the third feedback signal forwarded by any pitch controller indicates that the second contact group (23/24) of the corresponding second relay 20SK2 is disconnected.
In this embodiment, if the master controller receives a feedback signal forwarded by any pitch controller indicating that the second contact set (23/24) corresponding to the second relay 20SK2 is open, it indicates that the internal safety chain 105 of the pitch system is open. Because the priority and the execution speed of the hardware safety chain are higher than those of software control, after the internal safety chain 105 of the variable pitch system is disconnected for a period of time, the external safety chain 104 of the variable pitch system may still be in a connected state, and at the moment, the main control controller directly disconnects the external safety chain 104, so that the rapid linkage control of the internal safety chain 105 and the external safety chain 104 of the variable pitch system is realized. Specifically, the master controller may disconnect the external safety chain 104 of the pitch system by controlling any faulty node in the external safety chain 104 to disconnect.
Fig. 3 is a schematic structural diagram of the second relay 20SK2 according to the embodiment of the present invention, and as can be seen from fig. 3, the second relay 20SK2 includes a first signal input terminal P21 and a second signal input terminal P22 in addition to the coil (a2), the first contact set (13/14) and the second contact set (23/24).
The first signal input end P21 of the second relay 20SK2 of each pitch control unit is connected with the corresponding pitch controller, the pitch controller is further configured to send a fourth feedback signal to the first signal input end P21 of the corresponding second relay 20SK2, the fourth feedback signal is used for indicating the health state of the pitch controller, the second relay 20SK2 is further configured to receive the fourth feedback signal sent by the corresponding pitch controller, and when the fourth feedback signal indicates that the corresponding pitch controller has a fault, the coil (A2) of the corresponding pitch controller is controlled to be powered off, so that the internal safety chain 105 is disconnected.
In this embodiment, when the pitch controller of each pitch control unit detects a fault of itself, the coil (a2) of the pitch controller is controlled to be powered off by the first signal input end P21 corresponding to the second relay 20SK2, so that the internal safety chain 105 can be quickly disconnected, and a protection measure related to the disconnection of the internal safety chain 105 can be timely executed under the condition that the pitch controller is in fault, thereby ensuring the operation safety of the wind turbine generator system.
Fig. 4 is a schematic structural diagram of another wind turbine generator system safe operation control system provided according to an embodiment of the invention, and fig. 4 differs from fig. 1 in that each pitch control unit in fig. 4 further includes a third relay 20SK3, and a specific structure of the third relay 20SK3 is shown in fig. 5.
In the example of fig. 4 and 5, the third relay 20SK3 comprises a coil (A3) and a first set of contacts (15/16), the coil (A3) of the third relay 20SK3 of each pitch control unit being connected to the corresponding pitch drive, and the first set of contacts (15/16) of the third relay 20SK3 of each pitch control unit being connected to the second signal input P22 of the corresponding second relay 20SK 2.
Each pitch drive is configured to output a fifth feedback signal to the coil (A3) of the corresponding third relay 20SK3, the fifth feedback signal being indicative of the health of the pitch drive, the coil (A3) of the third relay 20SK3 being de-energised to open its first set of contacts (15/16) when the fifth feedback signal indicates a fault with the corresponding pitch drive.
The second signal input terminal P22 of each second relay 20SK2 is configured to receive a sixth feedback signal for indicating an execution state of the first contact set (15/16) of the corresponding third relay 20SK 3; each second relay is configured to control the coil (a2) of the corresponding second relay 20SK2 to be de-energized to open the first set of contacts (13/14) of the corresponding second relay 20SK2 to open the internal safety chain 105 when the sixth feedback signal indicates that the first set of contacts (15/16) of the corresponding third relay 20SK3 is open.
In the embodiment, when the pitch drive of each pitch control unit detects a fault, the fault information of the pitch drive can be fed back to the second relay 20SK2 through the coil (A3) and the first contact group (15/16) of the third relay 20SK3, and after the second relay 20SK2 receives a feedback signal indicating that the corresponding pitch drive has a fault, the coil (A2) of the second relay is actively controlled to be powered off, so that the first contact group (13/14) is disconnected, the internal safety chain 105 can be disconnected, and therefore the internal safety chain 105 can be started in time to disconnect related protective measures under the condition that the pitch drive has a fault, and the operation safety of the wind generating set is ensured.
In the example of fig. 5, the third relay 20SK3 further comprises a second contact set (25/26), the second contact set (25/26) of the third relay 20SK3 of each pitch control unit being connected to the pitch controller, each pitch controller being further configured to receive a seventh feedback signal for indicating an execution state of the second contact set (25/26) of the corresponding third relay 20SK 3.
Since the second contact group (25/26) of the third relay 20SK3 is consistent with the action of the first contact group (15/16), and the second contact group (25/26) is opened or closed at the same time, the execution state of the third relay 20SK3 is fed back to the corresponding pitch controller through the second contact group (25/26), so that the pitch controller can monitor the execution state of the third relay 20SK3, and upload the execution state of the third relay 20SK3 to a higher-level controller (such as a master controller), complete safety loop verification of safety feedback-safety execution results can be realized, and data support is provided for analysis and positioning of fault reasons.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. For the device embodiments, reference may be made to the description of the method embodiments in the relevant part. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Those skilled in the art may make various changes, modifications and additions or change the order between the steps after appreciating the spirit of the invention. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. For example, the algorithms described in the specific embodiments may be modified without departing from the basic spirit of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (11)
1. A wind generating set safe operation control system characterized by comprising: a plurality of pitch control units, each pitch control unit comprising a first relay (20SK1) and a pitch drive, the first relay (20SK1) comprising a coil (A1) and a first set of contacts (11/12);
the coil (A1) of the first relay (20SK1) of each pitch control unit is connected in parallel to an external safety chain (104) of a pitch system of the wind generating set, and the first contact group (11/12) of the first relay (20SK1) of each pitch control unit is connected with the emergency stop enabling end D1 of the corresponding pitch driver;
the coil (A1) of the first relay (20SK1) of each pitch control unit is powered off to open the first contact set (11/12) of the first relay in the case that the external safety chain (104) is disconnected, the scram enable end D1 is configured to receive a first feedback signal, the first feedback signal is used for indicating the execution state of the first contact set (11/12) of the corresponding first relay (20SK1), and the pitch driver is configured to drive the corresponding pitch motor to execute emergency feathering when the first feedback signal indicates that the first contact set (11/12) of the corresponding first relay (20SK1) is disconnected.
2. The system of claim 1,
each variable pitch control unit also comprises a variable pitch controller;
the variable pitch controller of each variable pitch control unit is connected with a corresponding variable pitch driver, and the variable pitch controller is configured to generate an emergency feathering instruction when a preset shutdown fault occurs in the wind generating set and send the emergency feathering instruction to the corresponding variable pitch driver, so that the variable pitch driver drives the corresponding variable pitch motor to execute emergency feathering according to the emergency feathering instruction.
3. The system of claim 1,
the first relay (20SK1) further comprising a second set of contacts (21/22);
each variable pitch control unit also comprises a variable pitch controller;
the second contact set (21/22) of the first relay (20SK1) of each pitch control unit is connected to a corresponding pitch controller, and the pitch controller is configured to receive a second feedback signal for indicating an execution state of the second contact set (21/22) of the corresponding first relay (20SK 1).
4. The system of claim 3,
each pitch control unit further comprises a second relay (20SK2), the second relay (20SK2) comprises a coil (A2) and a first contact group (13/14), the coils (A2) of the second relays (20SK2) of each pitch control unit are connected with corresponding pitch controllers, and the first contact group (13/14) of the second relays (20SK2) of each pitch control unit is connected into an internal safety chain (105) of the pitch system in series;
the pitch controller is further configured to control the coil (A2) of the corresponding second relay (20SK2) to be de-energized to open the first contact set (13/14) of the corresponding second relay (20SK2) to disconnect the internal safety chain (105) when the second feedback signal indicates that the second contact set (21/22) of the corresponding first relay (20SK1) is open.
5. The system of claim 4,
the second relay (20SK2) further comprising a second set of contacts (23/24);
the second contact set (23/24) of the second relay (20SK2) of each pitch control unit is connected to the corresponding pitch controller, and the pitch controller is further configured to receive a third feedback signal for indicating an execution state of the second contact set (23/24) of the corresponding second relay (20SK 2).
6. The system of claim 5,
the first relay (20SK1) further comprising a first signal input (P11);
the first signal input end of the first relay (20SK1) of each pitch control unit is connected with the corresponding pitch controller, and the pitch controller is further configured to send a first control signal to the first signal input end (P11) of the corresponding first relay (20SK1) when the third feedback signal indicates that the second contact set (23/24) of the corresponding second relay (20SK2) is disconnected, so that the corresponding first relay (20SK1) controls the coil of the wire (A1) to be powered off according to the first control signal, and the external safety chain (104) is disconnected.
7. The system of claim 5,
the system also includes a master controller;
the master control controller is connected with a pitch controller in each pitch control unit, and the pitch controller is configured to forward the third feedback signal to the master control controller;
the master control controller is further configured to receive third feedback signals forwarded by the pitch controllers in each pitch control unit, and to disconnect the outer safety chain (104) when the third feedback signals forwarded by any pitch controller indicate that the second contact set (23/24) of the corresponding second relay (20SK2) is disconnected.
8. The system of claim 4,
the second relay (20SK2) further comprising a first signal input (P21);
the first signal input end (P21) of the second relay (20SK2) of each pitch control unit is connected with the corresponding pitch controller, and the pitch controller is further configured to send a fourth feedback signal to the first signal input end (P21) of the corresponding second relay (20SK2), wherein the fourth feedback signal is used for indicating the health state of the pitch controller;
the second relay (20SK2) is further configured to receive a fourth feedback signal sent by the corresponding pitch controller and control the coil (A2) to be de-energized to open the first contact set (13/14) thereof to disconnect the internal safety chain (105) when the fourth feedback signal indicates that the corresponding pitch controller is faulty.
9. The system of claim 4,
the second relay (20SK2) further comprising a second signal input (P22),
each pitch control unit further comprises a third relay (20SK3), each third relay (20SK3) comprises a coil (A3) and a first contact group (15/16), the coil (A3) of the third relay (20SK3) of each pitch control unit is connected with the corresponding pitch drive, and the first contact group (15/16) of each third relay (20SK3) is connected with a second signal input end (P22) of the corresponding second relay (20SK 2);
the pitch drive is configured to output a fifth feedback signal to a coil (A3) of a corresponding third relay (20SK3), the fifth feedback signal being indicative of a state of health of the pitch drive;
a coil (A3) of the third relay (20SK3) is de-energized causing a first set of contacts (15/16) thereof to open when the fifth feedback signal indicates a fault with the corresponding pitch drive;
a second signal input of the second relay (20SK2) is configured to receive a sixth feedback signal indicative of an execution state of a first contact set (15/16) of a corresponding third relay (20SK 3);
the second relay (20SK2) is configured to control the coil (A2) of the corresponding second relay (20SK2) to be de-energized to open the first set of contacts (13/14) of the corresponding second relay (20SK2) to disconnect the internal safety chain (105) when the sixth feedback signal indicates that the first set of contacts (15/16) of the corresponding third relay (20SK3) is open.
10. The system of claim 9,
the third relay (20SK3) further comprising a second set of contacts (25/26);
the second contact set (25/26) of the third relay (20SK3) of each pitch control unit is connected to the corresponding pitch controller, and the pitch controller is further configured to receive a seventh feedback signal for indicating an execution state of the second contact set (25/26) of the corresponding third relay (20SK 3).
11. A wind turbine generator set, comprising: a wind park safety operation control system as claimed in any one of claims 1 to 10.
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| US20120087792A1 (en) * | 2010-10-12 | 2012-04-12 | Clipper Windpower, Inc. | Emergency feather rate limit with proportionality to operating pitch angle and energy storage voltage |
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| CN105484937A (en) * | 2015-12-30 | 2016-04-13 | 北京天诚同创电气有限公司 | Control method and device for variable pitch system of wind generating set |
| CN107917043A (en) * | 2016-10-10 | 2018-04-17 | 北京金风科创风电设备有限公司 | The processing method and system of the communication flash of wind-driven generator |
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2020
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| US20120087792A1 (en) * | 2010-10-12 | 2012-04-12 | Clipper Windpower, Inc. | Emergency feather rate limit with proportionality to operating pitch angle and energy storage voltage |
| WO2013182514A1 (en) * | 2012-06-06 | 2013-12-12 | Ssb Wind Systems Gmbh & Co. Kg | Safety system for a wind turbine |
| CN104963809A (en) * | 2015-06-25 | 2015-10-07 | 北京天诚同创电气有限公司 | Rotating speed protection method and system of wind generating set |
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