CN217036765U - Grid fault ride-through device of wind power generation double-fed unit - Google Patents
Grid fault ride-through device of wind power generation double-fed unit Download PDFInfo
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- CN217036765U CN217036765U CN202220821641.3U CN202220821641U CN217036765U CN 217036765 U CN217036765 U CN 217036765U CN 202220821641 U CN202220821641 U CN 202220821641U CN 217036765 U CN217036765 U CN 217036765U
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- 238000010248 power generation Methods 0.000 title claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a grid fault ride-through device of a wind power generation double-fed unit, which comprises a wind power generator and a grid access end, wherein a switch module and a maintaining module are arranged between the wind power generator and the grid access end, a first signal acquisition module is arranged between the wind power generator and the switch module as well as between the wind power generator and the maintaining module, a second signal acquisition module is arranged between the grid access end and the switch module as well as between the grid access end and the maintaining module, and the switch module, the maintaining module, the first signal acquisition module and the second signal acquisition module are respectively and electrically connected with a controller. The fault ride-through problem can be solved by simply changing the line between the wind driven generator and the power grid access end. The voltage sensor, the current sensor and the A/D conversion module are arranged in the first signal acquisition module and the second signal acquisition module, so that voltage and current can be monitored in real time, and the switch module and the maintaining module are controlled and adjusted according to accurate values when a fault occurs.
Description
Technical Field
The utility model relates to the technical field of wind power generation, in particular to a grid fault ride-through device of a wind power generation double-fed unit.
Background
Wind power generation refers to converting kinetic energy of wind into electric energy. Wind energy is a clean and pollution-free renewable energy source, and is used by people for a long time, mainly by pumping water, grinding surfaces and the like through a windmill, and people are interested in how to generate electricity by using wind. The wind generating set fault ride-through problem refers to the capability of ensuring that the wind generating set can continuously run without off-grid according to standard requirements and smoothly transit to a normal running state within a certain voltage or frequency range and a certain duration interval when the voltage or frequency of a grid-connected point exceeds a normal running range allowed by a standard due to an accident or disturbance of a power system. The grid fault brings a series of transient processes such as overcurrent, low voltage, overspeed and the like to wind power plant electrical equipment such as a wind turbine generator and the like. The wind turbine generator needs to have certain capability to pass through faults, namely, the wind turbine generator passes through faults. The proportion of wind power in a power grid reaches a higher level, if a wind turbine generator does not have qualified power grid fault resisting capability, the wind turbine generator is automatically split when meeting the power grid fault, the recovery difficulty of local power grid fault is increased, the stability of the power grid is deteriorated, and even the fault is aggravated and the system is crashed.
In the prior art, the problem of fault ride-through is generally solved by modifying a control system of a wind driven generator, but the overall modification period is long, the cost is high, the labor intensity of workers is high, the process is complex, and the rework process is complex when a problem occurs in the modification process.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a grid fault ride-through device of a wind power generation double-fed machine set, and aims to solve the problems that a control system of a wind power generator is long in modification period, high in cost, high in labor intensity of workers, complex in process and complex in rework process when problems occur in the modification process in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a wind power generation double-fed unit electric wire netting trouble passes through device, includes aerogenerator and electric wire netting incoming end, be provided with the switch module between aerogenerator and the electric wire netting incoming end and maintain the module, aerogenerator and switch module and maintain and be provided with first signal acquisition module between the module, be provided with the second signal acquisition module between electric wire netting incoming end and the switch module and the maintenance module, switch module, maintenance module, first signal acquisition module and second signal acquisition module electric connection respectively in controller.
Further preferably, the power grid is connected to one end of the power grid access end, and a circuit breaker, a transformer and a high-voltage switch are sequentially arranged between the power grid access end and the power grid.
Further preferably, a voltage sensor, a current sensor and an a/D conversion module are arranged inside each of the first signal acquisition module and the second signal acquisition module.
Further preferably, at least one voltage sensor is arranged in the first signal acquisition module and the second signal acquisition module.
Further preferably, at least one current sensor is arranged in the first signal acquisition module and the second signal acquisition module.
Further preferably, the a/D conversion module is used for connecting a voltage sensor and a controller and a current sensor and a controller.
Further preferably, the switch module further includes a plurality of power units and a plurality of unloading resistors, and the power unit and the unloading resistor form a group.
Compared with the prior art, the utility model has the beneficial effects that:
the fault ride-through problem can be solved by simply changing the line between the wind driven generator and the power grid access end. The voltage sensor, the current sensor and the A/D conversion module are arranged in the first signal acquisition module and the second signal acquisition module, so that voltage and current can be monitored in real time, and the switch module and the maintaining module are controlled and adjusted according to accurate values when a fault occurs.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
in the figure: the system comprises a wind driven generator 1, a controller 2, a switch 3, a maintaining module 4, a first signal acquisition module 5, a second signal acquisition module 6, a power grid access end 7, a circuit breaker 8, a high-voltage switch 9, a voltage sensor 10, a current sensor 11 and an A/D conversion module 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution:
the utility model provides a wind power generation double-fed unit electric wire netting trouble passes through device, including aerogenerator 1 and electric wire netting incoming end 7, be provided with switch module 3 and maintenance module 4 between aerogenerator 1 and the electric wire netting incoming end 7, aerogenerator 1 and switch module 3 and maintenance module 4 between be provided with first signal acquisition module 5, be provided with second signal acquisition module 6 between electric wire netting incoming end 7 and switch module 3 and the maintenance module 4, switch module 3, maintenance module 4, first signal acquisition module 5 and second signal acquisition module 6 electric connection respectively in controller 2.
In the utility model, one end of the power grid access end 7 is also connected with a power grid, and a circuit breaker 8, a transformer and a high-voltage switch 9 are sequentially arranged between the power grid access end 7 and the power grid.
In the utility model, a voltage sensor 10, a current sensor 11 and an A/D conversion module 12 are arranged in each of the first signal acquisition module 5 and the second signal acquisition module 6. The voltage or the current of the output end of the wind driven generator 1 and the input end of the power grid access end 7 can be monitored in real time according to requirements, and the voltage or the current can be effectively controlled through the controller 2.
In the utility model, at least one voltage sensor 10 is arranged in the first signal acquisition module 5 and the second signal acquisition module 6. The simultaneous operation of the plurality of voltage sensors 10 enables real-time monitoring of the multi-phase voltage and accurate control by the controller 2 in case of a fault.
In the utility model, at least one current sensor 11 is arranged in the first signal acquisition module 5 and the second signal acquisition module 6. The simultaneous operation of the current sensors 11 enables real-time monitoring of multiphase voltages and precise control by the controller 2 in case of a fault
In the present invention, the a/D conversion module 12 is used to connect the voltage sensor 10 and the controller 2 and the current sensor 11 and the controller 2.
In the utility model, the switch module 3 further comprises a plurality of power units and a plurality of unloading resistors, and one power unit and one unloading resistor form a group.
The working principle is as follows:
when the device is used, the voltage sensor 10 and the current sensor 11 in the first signal acquisition module 5 and the second signal acquisition module 6 are used for detecting voltage and current signals at the output end of the wind driven generator 1 and the input end of the power grid access end 7, and the voltage and current signals are converted into digital signals through the A/D conversion module 12 and are sent to the controller 2, so that whether the power grid has faults or not is judged. When the voltage and the current signal of the output end of the wind driven generator 1 or the input end of the power grid access end 7 are abnormal, the controller 2 controls the power unit and the unloading resistor of the switch module 3 to be disconnected, and controls the maintaining module 4 to work through the controller 2; when the voltage and the current signal of the output end of the wind driven generator 1 or the input end of the power grid access end 7 are normal, the controller 2 controls the power unit and the unloading resistor of the switch module 3 to be closed, and controls the maintaining module 4 to pause working through the controller 2.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model 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, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (7)
1. The utility model provides a wind power generation double-fed unit electric wire netting trouble passes through device, includes aerogenerator (1) and electric wire netting incoming end (7), its characterized in that: be provided with switch module (3) and maintain module (4) between aerogenerator (1) and electric wire netting incoming end (7), aerogenerator (1) and switch module (3) and maintain and be provided with first signal acquisition module (5) between module (4), electric wire netting incoming end (7) and switch module (3) and maintain and be provided with second signal acquisition module (6) between module (4), switch module (3), maintain module (4), first signal acquisition module (5) and second signal acquisition module (6) electric connection respectively in controller (2).
2. The grid fault ride-through device of the wind power generation doubly-fed machine set according to claim 1, characterized in that: the power grid system is characterized in that one end of the power grid access end (7) is further connected with a power grid, and a circuit breaker (8), a transformer and a high-voltage switch (9) are further sequentially arranged between the power grid access end (7) and the power grid.
3. The grid fault ride-through device of the wind power generation double-fed machine set according to claim 1, characterized in that: and a voltage sensor (10), a current sensor (11) and an A/D conversion module (12) are arranged in the first signal acquisition module (5) and the second signal acquisition module (6).
4. The grid fault ride-through device of the wind power generation double-fed machine set according to claim 3, characterized in that: at least one voltage sensor (10) is arranged in the first signal acquisition module (5) and the second signal acquisition module (6).
5. The grid fault ride-through device of the wind power generation double-fed machine set according to claim 3, characterized in that: at least one current sensor (11) is arranged in the first signal acquisition module (5) and the second signal acquisition module (6).
6. The grid fault ride-through device of the wind power generation doubly-fed machine set according to claim 3, characterized in that: the A/D conversion module (12) is used for connecting the voltage sensor (10) and the controller (2) and connecting the current sensor (11) and the controller (2).
7. The grid fault ride-through device of the wind power generation doubly-fed machine set according to claim 1, characterized in that: the switch module (3) further comprises a plurality of power units and a plurality of unloading resistors, and one power unit and one unloading resistor form a group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220821641.3U CN217036765U (en) | 2022-04-07 | 2022-04-07 | Grid fault ride-through device of wind power generation double-fed unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220821641.3U CN217036765U (en) | 2022-04-07 | 2022-04-07 | Grid fault ride-through device of wind power generation double-fed unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217036765U true CN217036765U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220821641.3U Expired - Fee Related CN217036765U (en) | 2022-04-07 | 2022-04-07 | Grid fault ride-through device of wind power generation double-fed unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217036765U (en) |
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2022
- 2022-04-07 CN CN202220821641.3U patent/CN217036765U/en not_active Expired - Fee Related
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Granted publication date: 20220722 |