CN114566946B - Method and equipment for processing faults of grid-connected contactor of wind generating set - Google Patents
Method and equipment for processing faults of grid-connected contactor of wind generating set Download PDFInfo
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- CN114566946B CN114566946B CN202210405312.5A CN202210405312A CN114566946B CN 114566946 B CN114566946 B CN 114566946B CN 202210405312 A CN202210405312 A CN 202210405312A CN 114566946 B CN114566946 B CN 114566946B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000002159 abnormal effect Effects 0.000 claims abstract description 20
- 238000004590 computer program Methods 0.000 claims description 10
- 230000011664 signaling Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000003672 processing method Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/083—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for three-phase systems
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- 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)
Abstract
The invention provides a method and equipment for processing a contactor fault of a wind generating set, wherein the method comprises the steps that a contactor fault identification module acquires contactor state information; judging whether the contactor is abnormal in breaking or not according to the contactor state information; when the breaking of the contactor is abnormal, a breaking signal is generated and sent to the breaker to break the breaker. Therefore, the contactor state is detected on line under various operation conditions, the abnormal condition of the contactor is found in advance, and the circuit breaker is opened according to the abnormal condition, so that the safety of the frequency converter and the like is protected, and accidents are avoided.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a method and equipment for processing faults of grid-connected contactors of a wind generating set.
Background
In the existing wind generating set, for example, a Hua Rui 1.5MW set generally adopts a stator contactor as a grid-connected switch, when the set is normally disconnected, a frequency converter and a control system can firstly control the power of the set to be reduced to be close to zero power, and when the current of a generator is close to zero, the stator contactor is controlled to be disconnected, so that the disconnection is realized. However, in emergency situations, the contactor breaks large current. The contactor itself does not have the capability of breaking large current, and most wind field contactors have longer running time and lower performance, which can cause arc discharge when the contactor is broken, even serious faults of contact adhesion. Once the fault occurs, the electric loop cannot be disconnected, the safety of devices such as a frequency converter is protected, and serious accidents such as inter-phase short circuit, grid-connected cabinet fire and even whole cabin fire can be caused directly due to the fact that the contactor contact copper bar is melted at high temperature and the contactor explosion is caused by arc discharge.
Disclosure of Invention
The invention provides a method and equipment for processing faults of a contactor of a wind generating set and a computer storage medium, and aims to solve the problem that the contactor in the prior art is not disconnected timely.
In order to solve the technical problem, in a first aspect, the invention provides a method for processing a failure of a contactor of a wind generating set, which comprises the following steps:
the contactor fault recognition module acquires contactor state information;
judging whether the contactor is abnormal in breaking or not according to the contactor state information;
when the breaking of the contactor is abnormal, a breaking signal is generated and sent to the breaker to break the breaker.
In one possible implementation, the method further includes:
after the contactor fault recognition module obtains that the fan has no fault, a closing signal is generated;
and sending the closing signal to the circuit breaker so as to close the circuit breaker.
In one possible implementation, the method further includes before:
setting a contactor fault identification module according to historical operation data of the contactor and allowable breaking time limit of the contactor; the historical operation data of the contactor comprise historical breaking time and historical breaking current.
In one possible implementation, the status information includes a tower-based breaker signal, a time period when the wind turbine is disconnected from the stator contactor, whether the wind turbine is balanced in three phases of current, a time period when the wind turbine is disconnected from the grid side contactor, and a current of the wind turbine is in the grid.
In one possible implementation manner, the determining whether the contactor breaks an abnormality according to the contactor state information specifically includes:
when grid connection is performed, a unit reports a broken tower foundation breaker signal to trigger a fault;
when the stator is disconnected, the fan overturns when the stator contactor is disconnected; alternatively, the fan is unbalanced in three phases of current, or the fan is overtime when the fan is disconnected from the contact device at the network side, or the fan flows through the power grid current.
In one possible implementation, when the contactor breaks abnormally, the method further includes:
determining a fault level;
and determining a fault processing mode according to the fault grade.
In one possible implementation manner, the determining a fault handling mode according to the fault level specifically includes:
generating a warning fault signal when the fault level is one level;
when the fault level is the second level, generating a warning fault signal and controlling the fan to stop;
and when the fault level is three-level, generating a disconnection signal and sending the disconnection signal to the tower foundation breaker so as to break the breaker.
In one possible implementation, the fault identification module is connected to the low voltage side of the tank and the foundation control cabinet to control the closing or opening of the circuit breaker via the low voltage side of the tank and the foundation control cabinet.
In a second aspect, the present invention provides a wind turbine generator system contactor fault handling apparatus comprising a memory, a processor and a computer program stored on the memory, the processor executing the computer program to carry out the steps of any of the methods of the first aspect.
In a third aspect, the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of any of the methods of the first aspect.
By applying the fault processing method for the contactor of the wind generating set, the state of the contactor is detected on line under various operation conditions, the abnormal condition of the contactor is found in advance, and the breaker is opened according to the abnormal condition, so that the safety of a frequency converter and the like is protected, and accidents are avoided.
Drawings
FIG. 1 is a main loop diagram of a tower foundation cabinet;
FIG. 2 is a schematic flow chart of a method for handling a failure of a contactor of a wind turbine generator system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a failure handling apparatus for a contactor of a wind turbine generator system according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of a computer readable storage medium according to a third embodiment of the present invention.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Example 1
Fig. 1 is a single line diagram of a 690V main circuit, and in fig. 1, includes a tank low voltage side, a tank circuit breaker (a part of the unit), a tower base circuit breaker, a network side contactor, a frequency converter network side, a stator contactor, and a generator stator side.
Wind field master control systems are divided into two types: ABB and bachman. In the control cabinet of any wind field main control system, the leading-out points of a programmable logic controller (Programmable Logic Controller, PLC) are inconsistent, and the inside of the tower foundation control cabinet is modified for the convenience of subsequent external construction so as to realize the unification of external interfaces and the standardization and the attractiveness of wiring.
Leading out a control signal line from a PLC of a wind generating set control system to a terminal of a tower foundation control box, adding 5 wiring terminals in the tower foundation control box, wherein a terminal strip is named as-X1, and the wiring conditions of a wiring port are as follows:
the port of the X1:1 terminal is connected with the port 5 of the PLC module DIO216, and the circuit breaker is controlled to be closed;
the port of the X1:2 terminal is connected with the port 6 of the PLC module DIO216 to control the breaking of the circuit breaker;
the port of the X1:3 terminal is connected with the port of the X150.2:1 24V+ in the tower foundation control cabinet to provide a 24V power supply for a circuit breaker control loop and a state feedback signal thereof;
the port of the X1:4 terminal is connected with the port of the X150.2:2:24V in the tower foundation control cabinet to provide a 24V power supply for a circuit breaker control loop and a state feedback signal thereof; (-X1: 5 Standby)
The port X1:6 is connected with the port 7 of the PLC module DIO216, and the breaking state of the circuit breaker is fed back.
Therefore, the PLC can carry out closing and breaking control on the circuit breaker through the tower foundation control cabinet.
Fig. 2 is a schematic flow chart of a method for handling faults of a contactor of a wind turbine generator system according to an embodiment of the present invention, as shown in fig. 2, the method includes the following steps:
step 110, a contactor fault recognition module acquires contactor state information;
specifically, the contactor fault recognition module is one module in the PLC, and the fault recognition module is connected with the tower foundation control cabinet so as to control the closing or opening of the tower foundation breaker through the tower foundation control cabinet. Prior to step 110, a contactor fault identification module is required, which may be set according to historical contactor operation data, contactor allowable breaking time limits. The historical operation data of the contactor comprise the historical breaking time and the historical breaking current of the stator contactor, and the historical breaking time and the historical breaking current of the main contactor refer to a network side contactor.
The state information comprises a tower base breaker signal, the disconnection time of the fan at the stator contactor, whether the fan is balanced in three phases of current, the disconnection time of the fan at the network side contactor and the current of the fan at the power grid.
The tower foundation breaker signal is used for triggering a fault alarm, and the tower foundation breaker can automatically trigger the alarm; the time length of the fan when the stator contactor is disconnected refers to the time length that the fan is when the stator contactor is disconnected exceeding the preset time length, and the stator contactor of the unit is marked to be disconnected abnormally; whether the fans are balanced in three phases of current or not refers to the three-phase balance of the current of the unit, namely, the three phases of current are all sine waves, and the frequency is the same, the amplitude is the same, and the phase difference is 120 degrees. To ensure three-phase balance, the three-phase voltage sources must be sine waves, and have the same frequency, the same amplitude, 120 degrees of phase difference, and the same load impedance of the three phases and linear impedance.
Step 120, judging whether the contactor is abnormal in breaking or not according to the contactor state information;
specifically, the contactor fault recognition module may perform the following judgment for grid connection and grid disconnection respectively:
first, grid connection
a. Under normal conditions, the fan meets the wind speed condition and starts to start the propeller, when the rotating speed is increased to a certain rotating speed, the frequency converter starts to start, the frequency converter automatically starts the grid side and the machine side, and after synchronization, grid connection is performed, and a grid connection contactor is closed.
b. After the unit breaks the tower foundation breaker signal to trigger the fault, the contactor fault recognition module controls the tower foundation breaker to be opened, the unit power supply is opened, whether the main loop of the unit is abnormal or not needs to be checked on site, and after the checking and processing are completed, the tower foundation breaker is closed, and the unit performs grid-connected logic under normal conditions.
Second, take off net
a. The frequency converter informs the PLC that it is in a fault state. The PLC controls the frequency converter to disconnect the grid-connected contactor, and then the PLC disconnects the grid-connected contactor.
b. If the fan is connected with the grid for more than 1 minute by the small wind, or the rotating speed is too low, the PLC is disconnected with the grid.
c. If the frequency converter is off-grid during power generation, the PLC is off-grid and enters a state of accelerating wind waiting.
d. If the wind is too large and exceeds the cut-out wind speed, the PLC actively informs the frequency converter to be disconnected, and after the frequency converter is normally disconnected, the PLC is disconnected.
e. The normal failure of the fan can lead the PLC to send a shutdown and off-grid command to the frequency converter.
Wherein a-e are normal off-line, and the subsequent f-i are processing methods in abnormal states.
f. When the stator contactor is disconnected, the fan overturns, the stator contactor of the unit is not normally disconnected, and the contactor fault recognition module controls the tower foundation breaker to break the brake-separating coil and break the tower foundation breaker.
g. The fan is unbalanced in three phases of current, the current of the unit is abnormal, and the contactor fault recognition module controls the brake-separating coil of the tower foundation breaker to separate the tower foundation breaker.
h. The fan is overtime when the network side contact device is disconnected, the unit network side contact device is not normally disconnected, and the contactor fault recognition module controls the switching-off coil of the tower foundation breaker to switch off the tower foundation breaker.
Wherein, the h is directed to a Bach Manger group.
i. When the fan flows through the power grid, the contactor fault recognition module controls the tower foundation breaker to break the brake coil and the tower foundation breaker to break.
The set values of the overtime and the current overcurrent of different types of units are different, and the specific numerical values are not limited in the application.
And 130, when the breaking of the contactor is abnormal, generating a breaking signal and sending the breaking signal to the circuit breaker so as to break the circuit breaker.
Wherein, before step 130, further comprises: determining a fault level; and determining a fault processing mode according to the fault grade.
Generating a warning fault signal when the fault level is one level; when the fault level is the second level, generating a warning fault signal and controlling the fan to stop; and when the fault level is three-level, generating a disconnection signal and sending the disconnection signal to the tower foundation breaker so as to break the tower foundation breaker.
Specifically, after step 130, if the anomaly has been relieved, the application may further include: after the contactor fault recognition module obtains that the fan has no fault, a closing signal is generated; and sending the closing signal to the tower foundation breaker so as to close the tower foundation breaker.
By applying the fault processing method for the contactor of the wind generating set, the state of the contactor is detected on line under various operation conditions, the abnormal condition of the contactor is found in advance, and the breaker is opened according to the abnormal condition, so that the safety of a frequency converter and the like is protected, and accidents are avoided.
Example two
In a second embodiment of the present invention, as shown in fig. 3, a failure handling device for a contactor of a wind turbine generator set is provided, where the failure handling device for a contactor of a wind turbine generator set includes a memory, a processor, and a computer program stored on the memory, and the processor executes the computer program to implement the steps of the method according to any one of the embodiments.
Example III
A third embodiment of the present invention provides a computer readable storage medium, as shown in fig. 4, having stored thereon a computer program which, when executed by a processor, implements the steps of any of the methods of the embodiments.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of function in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. A method for handling a failure of a contactor of a wind turbine generator system, the method comprising:
the contactor fault recognition module acquires contactor state information;
judging whether the contactor is abnormal in breaking or not according to the contactor state information;
when the breaking of the contactor is abnormal, a breaking signal is generated and sent to the breaker to break the breaker;
wherein, the method further comprises the following steps:
setting a contactor fault identification module according to historical operation data of the contactor and allowable breaking time limit of the contactor; the historical operation data of the contactor comprise historical breaking time and historical breaking current;
the state information comprises a tower foundation breaker signal, the disconnection time of the fan at the stator contactor, whether the fan is balanced in three phases of current or not and the disconnection time of the fan at the network side contactor; the judging whether the contactor is abnormal or not according to the contactor state information specifically comprises the following steps:
when grid connection is performed, a unit reports a broken tower foundation breaker signal to trigger a fault;
when the stator is disconnected, the fan overturns when the stator contactor is disconnected; alternatively, the blower is unbalanced in the three phases of current, or the blower is disconnected from the contactor over time in the network side.
2. The method according to claim 1, wherein the method further comprises:
after the contactor fault recognition module obtains that the fan has no fault, a closing signal is generated;
and sending the closing signal to the circuit breaker so as to close the circuit breaker.
3. The method of claim 1, wherein the status information further comprises fan on grid current.
4. A method according to claim 3, wherein the determining whether the contactor is abnormal according to the contactor status information comprises:
when the grid is disconnected, the fan flows through the grid current.
5. The method according to claim 1, wherein when the contactor is abnormal, the method further comprises:
determining a fault level;
and determining a fault processing mode according to the fault grade.
6. The method of claim 5, wherein determining a failure handling mode based on the failure level comprises:
generating a warning fault signal when the fault level is one level;
when the fault level is the second level, generating a warning fault signal and controlling the fan to stop;
and when the fault level is three-level, generating a disconnection signal and sending the disconnection signal to the tower foundation breaker so as to break the breaker.
7. The method of claim 1, wherein the fault identification module box low voltage side is connected to a tower foundation control cabinet to control the closing or opening of the circuit breaker via the box low voltage side, tower foundation control cabinet.
8. A wind turbine generator set contactor fault handling device comprising a memory, a processor and a computer program stored on the memory, characterized in that the processor executes the computer program to carry out the steps of the method according to any one of claims 1-7.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1-7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210405312.5A CN114566946B (en) | 2022-04-18 | 2022-04-18 | Method and equipment for processing faults of grid-connected contactor of wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210405312.5A CN114566946B (en) | 2022-04-18 | 2022-04-18 | Method and equipment for processing faults of grid-connected contactor of wind generating set |
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| CN114566946B true CN114566946B (en) | 2024-02-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115419549B (en) * | 2022-09-14 | 2025-01-03 | 中国华能集团清洁能源技术研究院有限公司 | Grid-connected loop system of wind turbine generator and control method |
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| AU2020101819A4 (en) * | 2020-08-14 | 2020-09-24 | Xuchang University | A kind of fault handling system and unit structure of doubly-fed wind turbine generator |
| CN113394757A (en) * | 2021-06-18 | 2021-09-14 | 四川华能宝兴河水电有限责任公司 | Single-trip-coil-unit-based outlet circuit breaker failure protection method |
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