CN217882826U - Relay protection device and wind turbine generator system - Google Patents
Relay protection device and wind turbine generator system Download PDFInfo
- Publication number
- CN217882826U CN217882826U CN202222104544.5U CN202222104544U CN217882826U CN 217882826 U CN217882826 U CN 217882826U CN 202222104544 U CN202222104544 U CN 202222104544U CN 217882826 U CN217882826 U CN 217882826U
- Authority
- CN
- China
- Prior art keywords
- wind turbine
- turbine generator
- switch
- module
- relay protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The utility model discloses a relay protection device and a wind turbine generator system, which relates to the field of relay protection.A first switch is arranged between the body of the wind turbine generator system and a transformer of the wind turbine generator system; the input end of the acquisition module is connected with the output end of a transformer of the wind turbine generator, and the output end of the acquisition module is connected with the input end of the control module and used for acquiring the working current and the working voltage of the transformer; the first control end of the control module is connected with the first switch and used for detecting working current and working voltage, controlling the first switch to be disconnected and triggering the secondary safety chain of the wind turbine when detecting that the wind turbine breaks down, and controlling the first switch to be closed when detecting that the wind turbine normally works. The first switch is disconnected when the wind turbine generator breaks down, so that the connection between the wind turbine generator and a power grid is disconnected, and the accuracy of relay protection of the wind turbine generator can be improved.
Description
Technical Field
The utility model relates to a relay protection field especially relates to a relay protection device and wind turbine generator system.
Background
With the progress of new energy technology, the single-machine capacity of a single wind turbine generator is higher and higher, the probability of the wind turbine generator failing is higher and higher, and relay protection needs to be performed on the wind turbine generator when the wind turbine generator fails. In the prior art, when relay protection is performed on a wind turbine generator, the relay protection is usually performed by using a three-section type frame circuit breaker and a main control system, specifically, three-phase currents in the wind turbine generator are detected by the main control system, and when a current difference value between any phase current and other phase currents is greater than a preset current threshold value, it is determined that the wind turbine generator fails, and the circuit breaker executes protection action. However, the method for determining the current difference is prone to generate errors, and particularly when the power of the wind turbine generator is large, the generated errors are large, a circuit breaker or a master control system is prone to malfunction, and the wind turbine generator cannot be accurately protected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a relay protection device and wind turbine generator system realizes the relay protection to wind turbine generator system, need not judge whether unbalanced three phase carries out relay protection to wind turbine generator system through major control system, has improved relay protection's accuracy.
In order to solve the technical problem, the utility model provides a relay protection device, include:
the device comprises a control module, an acquisition module and a first switch;
the first switch is arranged between the body of the wind turbine generator and the low-voltage side of the transformer of the wind turbine generator;
the input end of the acquisition module is connected with the output end of a transformer of the wind turbine generator, the output end of the acquisition module is connected with the input end of the control module, and the acquisition module is used for acquiring the working current and the working voltage of the transformer of the wind turbine generator;
the first control end of the control module is connected with the control end of the first switch, the control module is used for controlling the first switch to be disconnected and triggering the secondary safety chain of the wind turbine generator when detecting that the body of the wind turbine generator breaks down according to the working current and the working voltage, and controlling the first switch to be closed when detecting that the body of the wind turbine generator normally works.
Preferably, the device further comprises a second switch;
the second switch is arranged between a power grid and the high-voltage side of a transformer of the wind turbine generator;
and the control end of the second switch is connected with the second control end of the control module, and the second switch is used for being disconnected when the first switch fails.
Preferably, the acquisition module comprises:
current transformers and voltage transformers;
the primary side of the current transformer is connected with the low-voltage side of a transformer of the wind turbine generator, and the secondary side of the current transformer is connected with the first input end of the control module;
the primary side of the voltage transformer is connected with the low-voltage side of a transformer of the wind turbine generator, and the secondary side of the voltage transformer is connected with the second input end of the control module.
Preferably, the device also comprises an AD module;
the input of AD module with the output of collection module is connected, the output of AD module with control module's input is connected.
Preferably, the first switch is a circuit breaker.
Preferably, the control module is a ZYNQ-7010 module.
Preferably, the device also comprises a power supply module;
the power module is connected with the control module and is used for supplying power to the control module.
Preferably, the system also comprises a prompt module;
the prompting module is connected with the control module and used for giving a prompt when the body of the wind turbine generator breaks down.
Preferably, the device further comprises a third switch;
the third switch is arranged between a converter of the wind turbine generator and the body of the wind turbine generator, and the third switch is used for being switched off when the body of the wind turbine generator fails and being switched on when the body of the wind turbine generator normally works.
The application also provides a wind turbine generator, which comprises a wind turbine generator body and the relay protection device;
the wind turbine generator body is connected with the relay protection device.
The utility model provides a relay protection device and a wind turbine generator system, which relates to the field of relay protection.A first switch is arranged between the body of the wind turbine generator system and a transformer of the wind turbine generator system; the input end of the acquisition module is connected with the output end of a transformer of the wind turbine generator, and the output end of the acquisition module is connected with the input end of the control module and used for acquiring the working current and the working voltage of the transformer; the first control end of the control module is connected with the first switch and used for detecting working current and working voltage, the first switch is controlled to be switched off when the wind turbine generator is detected to be out of order, and the first switch is controlled to be switched on when the wind turbine generator is detected to be in normal operation. The first switch is disconnected when the wind turbine generator breaks down, so that the connection between the wind turbine generator and a power grid is disconnected, and the accuracy of relay protection of the wind turbine generator can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a relay protection device provided in the present application;
FIG. 2 is a schematic structural diagram of a control module provided herein;
fig. 3 is a schematic structural diagram of another relay protection device provided in the present application;
fig. 4 is a schematic structural diagram of a wind turbine provided by itself.
Detailed Description
The core of the utility model is to provide a relay protection device and wind turbine generator system, realize the relay protection to wind turbine generator system, need not carry out relay protection to wind turbine generator system through judging whether unbalanced three phase of wind turbine generator system has improved relay protection's accuracy.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a relay protection device provided in the present application, including a control module 1, an acquisition module 2, and a first switch 3;
the first switch 3 is arranged between the body of the wind turbine 4 and the low-voltage side of the transformer 5 of the wind turbine 4;
the input end of the acquisition module 2 is connected with the low-voltage side of the transformer 5, the output end of the acquisition module 2 is connected with the input end of the control module 1, and the acquisition module 2 is used for acquiring the working current and the working voltage of the transformer 5;
the first control end of the control module 1 is connected with the control end of the first switch 3, the control module 1 is used for controlling the first switch 3 to be switched off and triggering the secondary safety chain of the wind turbine generator when detecting that the wind turbine generator 4 breaks down according to working current and working voltage, and controlling the first switch 3 to be switched on when detecting that the wind turbine generator 4 normally works.
At present, a plurality of double-fed wind power units produced in early stage exist, the configuration of relay protection of the wind power units 4 is simple and crude due to the small unit capacity, low voltage, low manufacturing cost compression and the like of the wind power units 4, the relay protection is realized only through a simple three-section overcurrent trip type circuit breaker, and the circuit breaker has the defects of limited fixed value grading, single action curve, no fault recording information record and the like, so that various abnormal fault conditions of a stator, a rotor and an outgoing line of the wind power unit 4 cannot be comprehensively monitored and protected. Meanwhile, as the single machine capacity of the wind turbine generator 4 is larger and larger, the fault probability of the wind turbine generator 4 is higher and higher, and the current safety requirement cannot be met by using a three-section overcurrent trip circuit breaker to perform relay protection on the wind turbine generator 4.
In order to solve the technical problems, in the application, according to B14285 specified by national standards; DL/T1631 relay protection method includes that current and voltage of a transformer 5 corresponding to a wind turbine 4 are collected through a collection module 2, a control module 1 judges whether the wind turbine 4 has a fault or not through working current and working voltage collected by the collection module 2, specifically, working current and working voltage of a plurality of wind turbines 4 in normal work can be collected in advance to determine normal data ranges of the working current and the working voltage of the wind turbine 4 in normal work, the normal data ranges are stored in the control module 1, and in actual application, if the control module 1 finds that specific values of the working current or the working voltage collected by the collection module 2 are not in the normal data ranges corresponding to the working current or the working voltage, it is stated that the working current or the working voltage is abnormal at the moment, it can be determined that the wind turbine 4 has the fault. In order to realize relay protection of the wind turbine generator 4, a first switch 3 is arranged between a transformer 5 corresponding to the wind turbine generator 4 and a body of the wind turbine generator 4, when the wind turbine generator 4 breaks down, the control module 1 controls the first switch 3 to be disconnected, the connection relation between the transformer 5 and the wind turbine generator 4 is disconnected, namely, fault equipment is separated from the whole power grid system, so that relay protection of the wind turbine generator 4 is realized, the connection between the transformer 5 and the wind turbine generator 4 is directly disconnected, and in other words, protection of various abnormal fault conditions of a stator, a rotor, a frequency converter and outgoing lines of a generator is realized.
In addition, in order to guarantee safety, when the wind turbine generator 4 breaks down and the control module 1 controls the first switch 3 to be switched off, the control module 1 cannot automatically control the first switch 3 to be switched on, but the control module 1 controls the first switch 3 to be switched on only after receiving a signal that the wind turbine generator 4 recovers to work normally, for example, a worker repairs the wind turbine generator 4, the repair is completed and the test determines that the wind turbine generator is completely normal, the worker sends a signal that the wind turbine generator recovers to work normally to the control module 1 through equipment, at the moment, the control module 1 controls the first switch 3 to be switched on only, so that the first switch 3 is prevented from being accidentally switched on when the wind turbine generator 4 still breaks down.
The main functions of the control module 1 are implemented by a trip Unit, a CPU (Central Processing Unit), a bus Unit and an operation panel Unit, please refer to fig. 2, and fig. 2 is a schematic structural diagram of the control module provided in the present application. The trip unit is used for controlling the action of the first switch 3, provides 16-way opening and closing output and 5-way opening and closing input, and is controlled by the CPU; the CPU is mainly used for calculating according to the working voltage and the working current so as to judge whether the wind turbine generator 4 is in fault; the operation panel unit is mainly used as a man-machine interface interaction unit, and the units are mutually connected through a bus.
In summary, by arranging the control module 1, the acquisition module 2 and the first switch 3, the first switch 3 is arranged between the body of the wind turbine 4 and the transformer 5 of the wind turbine 4; the input end of the acquisition module 2 is connected with the output end of a transformer 5 of the wind turbine generator 4, and the output end of the acquisition module is connected with the input end of the control module 1 and is used for acquiring the working current and the working voltage of the transformer 5; the first control end of the control module 1 is connected with the first switch 3 and used for detecting working current and working voltage, when the wind turbine generator 4 is detected to be out of order, the first switch 3 is controlled to be disconnected and a secondary safety chain of the wind turbine generator 4 is triggered, and when the wind turbine generator 4 is detected to be in normal operation, the first switch 3 is controlled to be closed. The first switch 3 is disconnected when the wind turbine generator 4 breaks down, so that the connection between the wind turbine generator 4 and a power grid is disconnected, main protection and auxiliary protection of the wind turbine generator are achieved, and the accuracy of relay protection of the wind turbine generator 4 can be improved.
On the basis of the above-described embodiment:
as a preferred embodiment, a second switch 6 is further included;
the second switch 6 is arranged between the power grid and the high-voltage side of the transformer 5 of the wind turbine 4;
the control end of the second switch 6 is connected with the second control end of the control module 1, and the second switch 6 is used for being disconnected when the first switch 3 fails.
In order to improve reliability, in the application, it is considered that the first switch 3 may not be timely disconnected when the wind turbine generator 4 fails due to the conditions of line aging or failure and the like, so that relay protection cannot be timely performed on the wind turbine generator 4; in addition, it is also considered that since only a load switch and a fuse are usually configured at the transformer 5, once the wind turbine 4 fails, and the first switch 3 also fails, the fuse can be blown to remove the failure, and relay protection cannot be performed well. Based on this, a second switch 6 may be disposed between the transformer 5 and the power grid, please refer to fig. 3, and fig. 3 is a schematic structural diagram of another relay protection device provided in the present application, when the wind turbine 4 fails and the control module 1 controls the first switch 3 to be turned off, if the control module 1 can still collect a large current and a large voltage from the collection module 2 after a period of time, it indicates that the first switch 3 fails, and at this time, the second switch 6 is controlled to be turned off, which is equivalent to directly turning off the connection between the wind turbine system where the wind turbine 4 is located and the power grid, which not only achieves the purpose of relay protection, but also serves as the differential protection of the transformer 5, thereby improving the reliability.
Therefore, at the moment, the relay protection device can not only carry out relay protection on the wind turbine generator 4, but also carry out relay protection on a wind turbine system where the wind turbine generator 4 is located, the relay protection of the wind turbine generator or the wind turbine generator 4 is realized by configuring segmented overcurrent or direction overcurrent, negative sequence overcurrent or negative sequence direction overcurrent criteria, and meanwhile, the source of the fault can be determined to be the position of the wind turbine generator 4 or the power grid side and the like by detecting the negative sequence direction overcurrent protection, and in addition, when the first switch 3 has the fault, the second switch 6 is switched off after short time delay; when the fault point is in the power grid, the fault point needs to be matched with the fixed value and the action time of low-voltage ride through of the fan and far-end protection of the power grid side, so that a backup protection effect is achieved. Based on this, the relay protection device improves the relay protection function of the wind turbine generator system and improves the usability of the electromechanical protection device.
As a preferred embodiment, the acquisition module 2 comprises:
a current transformer and a voltage transformer;
the primary side of the current transformer is connected with the low-voltage side of a transformer 5 of the wind turbine generator, and the secondary side of the current transformer is connected with the first input end of the control module 1;
the primary side of the voltage transformer is connected with the low-voltage side of a transformer 5 of the wind turbine generator, and the secondary side of the voltage transformer is connected with the second input end of the control module 1.
In order to collect the working current and the working voltage of the transformer 5, in the application, the current in the power transmission line is considered to be greatly different, the common instruments such as a voltmeter and an ammeter are difficult to accurately measure, and the direct measurement of the larger current or voltage also easily causes equipment damage or personnel injury, so that the current and the voltage can be collected through the current transformer and the voltage transformer. The current transformer and the voltage transformer have similar functions, can convert larger current and voltage into smaller current and voltage, and can ensure the safety of operators and instruments.
Considering that the control module 1 cannot normally acquire working current and working voltage due to the fact that the current transformer and the voltage transformer are damaged or broken, in order to enable a worker to find problems in time, whether the current transformer and the voltage transformer are broken can be detected, a signal is sent to the alarm module when the current transformer and the voltage transformer are broken, so that the alarm module sends an alarm to prompt the worker that the acquisition module 2 is damaged, specifically, the judgment can be carried out through the current value or the voltage value acquired by the current transformer and the voltage transformer, and when the acquired current value or the voltage value is very small or even zero, the disconnection of the transformer can be indicated; when the acquisition module 2 is damaged or disconnected, because working current and working voltage cannot be acquired, whether the wind turbine generator 4 has a fault or not cannot be determined, and at the moment, the first switch 3 and the second switch 6 can be kept closed, so that abnormal relay protection of the wind turbine generator 4 is avoided.
As a preferred embodiment, the device further comprises an AD module;
the input end of the AD module is connected with the output end of the acquisition module 2, and the output end of the AD module is connected with the input end of the control module 1.
In order to determine the values of the operating current and the operating voltage, in the present application, it is considered that the operating voltage value and the operating current value acquired by the acquisition module 2 are both analog quantities, and the control module 1 can only operate on digital quantities, so that it is necessary to convert the operating voltage value and the operating current value of the analog quantities into digital quantities first, specifically, referring to fig. 2, fig. 2 is a schematic structural diagram of the control module 1 provided in the present application, an AD (analog-to-digital conversion) module is composed of an AI analog quantity input unit and a DO digital quantity output unit, the AI analog quantity input unit provides 14 paths of alternating current signal inputs, the DO digital quantity output unit provides 16 paths of open quantities, and the CPU module opens the control module 1 to perform control, and converts the operating voltage value and the operating current value. In addition, the AD module may be further disposed in the control module 1, and disposed on the same backplane as the CPU in the control module 1, at this time, the AD module may input the converted signal to the CPU through the backplane wiring, so that the CPU determines the values of the operating current and the operating voltage.
As a preferred embodiment, the first switch 3 is a circuit breaker.
The circuit breaker is a switching device which can normally switch on and off and bear current when the wind turbine generator 4 is not in fault, can sensitively perform switching action according to an instruction of the control module 1 and can automatically break in a specified time when the wind turbine generator 4 is in fault, and therefore the circuit breaker not only can realize the function of the first switch 3, but also can automatically cut off when the wind turbine generator 4 is in serious overload or short circuit, undervoltage and other faults. In addition, the breaker can bear a large voltage peak value, and can be widely applied to various types of wind turbines 4.
As a preferred embodiment, the control module 1 is a ZYNQ-7010 module.
In order to implement the functions of the control module 1, in the present application, a ZYNQ-7010 module is adopted as the control module 1, specifically as a processor in the control module 1, and the ZYNQ-7010 module is composed of an ARM (Advanced RISC microprocessors, RISC microprocessors) chip with dual cores A9 and an FPGA (Field Programmable Gate Array), wherein a CPU-0 core in the ARM implements a function of communicating with a device and a user, a CPU-1 core in the ARM implements logic functions such as current and voltage detection and relay protection judgment, and the FPGA implements functions of opening and closing other modules such as the acquisition module 2 or the first switch 3.
As a preferred embodiment, the device further comprises a power supply module;
the power module is connected with the control module 1 and is used for supplying power to the control module 1.
Because control module 1 itself needs electric power just can normally work, consider if the electric power that directly uses wind turbine generator 4 to produce supplies power to control module 1, when wind turbine generator 4 breaks down, probably lead to the power supply to control module 1 to go wrong to probably lead to control module 1 can't control first switch 3 disconnection in time when wind turbine generator 4 breaks down, can not carry out relay protection to wind turbine generator 4 better. Based on this, a power module may be additionally set, and the power module provides power for the control module 1, or the power module may be used as a unit in the control module 1, please refer to fig. 2, and fig. 2 is a schematic structural diagram of the control module 1 provided in the present application. In addition, control module 1 can also detect whether power module has the trouble, judges through the electric current and the voltage of power module output, in time reminds the staff when power module breaks down to in time maintain power module, guarantee control module 1's normal operating.
As a preferred embodiment, the system further comprises a prompt module;
the prompting module is connected with the control module 1 and used for giving a prompt when the body of the wind turbine generator 4 breaks down.
For in time indicate the staff, in this application, send the information that wind turbine generator system 4 broke down through the suggestion module with the suggestion staff, it is specific, when wind turbine generator system 4 broke down, control module 1 can carry out the trouble record ripples, record wind turbine generator system 4's working parameter and current-voltage isoparametric, when carrying out the record ripples, can self-defined record ripples way number and record ripples duration etc. with wind turbine generator system 4's parameter in a period of time after the trouble, and send and show on the suggestion module, can not only in time indicate the staff, can also let the staff simply confirm the reason that wind turbine generator system 4 broke down.
As a preferred embodiment, a third switch 7 is further included;
the third switch 7 is arranged between a converter 8 of the wind turbine 4 and the body of the wind turbine 4, and the third switch 7 is used for being switched off when the body of the wind turbine 4 is in fault and being switched on when the body of the wind turbine 4 normally works.
In order to better protect the wind turbine 4, please refer to fig. 3 in the present application, fig. 3 is a schematic structural diagram of another relay protection device provided in the present application, a third switch 7 is further provided, when the wind turbine 4 fails, after the first switch 3 is disconnected, the connection between the wind turbine 4 and the power grid is disconnected, so as to form relay protection for the wind turbine 4, however, because the wind turbine 4 is a power generation device, the short-circuit current inside the wind turbine 4 can be eliminated within a certain time, if the short-circuit current inside the wind turbine is eliminated for too long, the risk of damage to the wind turbine 4 may also be generated, by providing the third switch 7, when the wind turbine 4 fails, the connection between the wind turbine 4 itself and the converter 8 of the wind turbine 4 is disconnected, so as to achieve fast demagnetization of the rotor winding of the wind turbine 4, and fast cut off the internal short-circuit when the wind turbine 4 fails, thereby better protecting the wind turbine 4.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a wind turbine provided by itself, including a wind turbine body 91, and further including a relay protection device 92 as described above;
the wind turbine generator body 91 is connected to a relay protection device 92.
For detailed description of the wind turbine provided in the present application, please refer to the embodiment of the relay protection device described above, which is not described herein again.
It should also be noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, article, or apparatus that comprises the element.
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 (10)
1. A relay protection device, comprising:
the device comprises a control module, an acquisition module and a first switch;
the first switch is arranged between the body of the wind turbine generator and the low-voltage side of the transformer of the wind turbine generator;
the input end of the acquisition module is connected with the low-voltage side of a transformer of the wind turbine generator, the output end of the acquisition module is connected with the input end of the control module, and the acquisition module is used for acquiring the working current and the working voltage of the transformer of the wind turbine generator;
the first control end of the control module is connected with the control end of the first switch, the control module is used for controlling the first switch to be disconnected and triggering the secondary safety chain of the wind turbine generator when detecting that the body of the wind turbine generator breaks down according to the working current and the working voltage, and controlling the first switch to be closed when detecting that the body of the wind turbine generator normally works.
2. The relay protection device according to claim 1, further comprising a second switch;
the second switch is arranged between a power grid and the high-voltage side of a transformer of the wind turbine generator;
and the control end of the second switch is connected with the second control end of the control module, and the second switch is used for being disconnected when the first switch fails.
3. The relay protection device according to claim 1, wherein the collection module comprises:
current transformers and voltage transformers;
the primary side of the current transformer is connected with the low-voltage side of a transformer of the wind turbine generator, and the secondary side of the current transformer is connected with the first input end of the control module;
the primary side of the voltage transformer is connected with the low-voltage side of a transformer of the wind turbine generator, and the secondary side of the voltage transformer is connected with the second input end of the control module.
4. The relay protection device according to claim 1, further comprising an AD module;
the input of AD module with the output of collection module is connected, the output of AD module with control module's input is connected.
5. The relay protection device according to claim 1, wherein said first switch is a circuit breaker.
6. The relay protection device according to claim 1, wherein said control module is a ZYNQ-7010 module.
7. The relay protection device according to claim 1, further comprising a power supply module;
the power module is connected with the control module and is used for supplying power to the control module.
8. The relay protection device according to claim 1, further comprising a prompt module;
the prompting module is connected with the control module and used for giving a prompt when the body of the wind turbine generator breaks down.
9. The relay protection device according to any one of claims 1 to 8, further comprising a third switch;
the third switch is arranged between a converter of the wind turbine generator and the body of the wind turbine generator, and the third switch is used for being switched off when the body of the wind turbine generator fails and being switched on when the body of the wind turbine generator works normally.
10. A wind turbine generator, characterized by comprising a wind turbine generator body and a relay protection device according to any one of claims 1 to 9;
the wind turbine generator body is connected with the relay protection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222104544.5U CN217882826U (en) | 2022-08-10 | 2022-08-10 | Relay protection device and wind turbine generator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222104544.5U CN217882826U (en) | 2022-08-10 | 2022-08-10 | Relay protection device and wind turbine generator system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217882826U true CN217882826U (en) | 2022-11-22 |
Family
ID=84075087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222104544.5U Active CN217882826U (en) | 2022-08-10 | 2022-08-10 | Relay protection device and wind turbine generator system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217882826U (en) |
-
2022
- 2022-08-10 CN CN202222104544.5U patent/CN217882826U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107819357B (en) | Isolated parallel UPS system with fault location detection | |
| US9007735B2 (en) | Fault detection, isolation, location and reconnection systems and methods | |
| CN107819356B (en) | Isolated parallel uninterruptible power supply system with choke bypass switch | |
| CN101752873B (en) | Protection method of DC electricity transmission high-voltage convertor station | |
| WO2018105989A1 (en) | Microgrid system, and method for managing malfunction | |
| CN102522731B (en) | Intelligent reclosing controller | |
| CN109061451B (en) | Monitoring method and system for lightning arrester of hybrid direct current circuit breaker | |
| Mirsaeidi et al. | Review and analysis of existing protection strategies for micro-grids | |
| CN207853440U (en) | A kind of intelligent universal circuit breaker | |
| CN201199630Y (en) | Leakage protector with zero-off protection | |
| CN201360135Y (en) | Intelligent integrated leakage protection device | |
| CN113572193B (en) | Distributed power island operation state identification method, fusion terminal and system | |
| Oyon et al. | Three Phase Fault Analysis Using Thermal-Magnetic Circuit Breaker and Overcurrent Relay | |
| EP3391489B1 (en) | Ground fault detection and interrupt system | |
| CN217882826U (en) | Relay protection device and wind turbine generator system | |
| CN105471278A (en) | Auxiliary control device applied to converter and converter system | |
| CN111650542A (en) | Detection device and method for preventing slow fusing of generator set terminal voltage transformer fuse | |
| Hosseini | Analysis of substation protection system failures and reliability | |
| Hedel et al. | Reliability assessment of protection system for DC Ring microgrid using fault tree method | |
| Wu et al. | Research on fault isolation technology and device development of LVDC system | |
| CN217112562U (en) | Power supply and distribution fault handling device and power supply and distribution system | |
| CN219980426U (en) | DC protection power supply system | |
| CN213813868U (en) | Circuit breaker control circuit fault point positioning device | |
| CN217332751U (en) | Alternating current circuit breaker level difference cooperation testing device | |
| KR20140009747A (en) | Apparatus and method for controlling fault monitoring and fault prevention of power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |