CN111431144A - Generator protection device and method - Google Patents
Generator protection device and method Download PDFInfo
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- CN111431144A CN111431144A CN202010188592.XA CN202010188592A CN111431144A CN 111431144 A CN111431144 A CN 111431144A CN 202010188592 A CN202010188592 A CN 202010188592A CN 111431144 A CN111431144 A CN 111431144A
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- generator
- voltage
- control module
- electrically connected
- rotating speed
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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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- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The embodiment of the invention provides a generator protection device and a method, wherein the generator protection device comprises: the acquisition module is used for acquiring the rotating speed of the generator and the voltage of the generator; the control module is electrically connected with the acquisition module and used for receiving the rotating speed and the voltage sent by the acquisition module, and if the rotating speed and the voltage meet preset conditions, an execution instruction is generated; and the execution module is respectively electrically connected with the control module and the outlet switch of the generator and is used for receiving the execution command sent by the control module and executing the operation of disconnecting the outlet switch according to the execution command, so that the generator can be prevented from being changed into a motor, and the generator can be prevented from being burnt.
Description
Technical Field
The embodiment of the invention relates to a generator protection device and a generator protection method.
Background
The generator cannot be disconnected in industrial development, and when the generator is in an off-state, if the generator is operated by mistake, the power grid can transmit power to the generator, so that the generator becomes a motor, and the generator is burnt.
Disclosure of Invention
Problems to be solved by the invention
An object of an embodiment of the present invention is to provide a generator protection apparatus and method, which can prevent a generator from becoming a motor, so as to prevent the generator from being burnt.
Means for solving the problems
To achieve the above object, in a first aspect of embodiments of the present invention, there is provided a generator protection device including:
the acquisition module is used for acquiring the rotating speed of the generator and the voltage of the generator;
the control module is electrically connected with the acquisition module and used for receiving the rotating speed and the voltage sent by the acquisition module, and if the rotating speed and the voltage meet preset conditions, an execution instruction is generated;
and the execution module is respectively electrically connected with the control module and the outlet switch of the generator, and is used for receiving the execution instruction sent by the control module and executing the operation of disconnecting the outlet switch according to the execution instruction.
Further, the preset conditions include: the rotation speed is less than the first threshold value and the voltage is greater than the second threshold value.
Further, the first threshold value is 3000r/min, and the second threshold value is any value between 20V and 30V.
Further, the execution module includes:
a relay, an excitation coil of which is electrically connected with the control module, and a normally-open contact of which is electrically connected with a tripping coil of the outlet switch;
the relay receives an execution instruction sent by the control module, the normally open contact is closed, and at the moment, the tripping coil of the outlet switch trips to disconnect the outlet switch after being electrified.
Further, the acquisition module comprises:
the transformer is electrically connected with the generator at one end and used for converting strong current output by the generator into weak current;
the voltage sampling plate is electrically connected with the control module and the other end of the mutual inductor respectively and is used for collecting the weak current voltage;
a sensor for acquiring a rotational speed of the generator.
Further, the apparatus further comprises:
and the display module is electrically connected with the control module and is used for displaying the rotating speed and the voltage received by the control module.
In a second aspect of embodiments of the present invention, a generator protection method is provided, the method comprising:
collecting the rotating speed of a generator and the voltage of the generator;
if the rotating speed and the voltage meet preset conditions, generating an execution instruction;
and according to the execution instruction, executing the operation of opening an outlet switch of the generator.
ADVANTAGEOUS EFFECTS OF INVENTION
The embodiment of the invention adopts at least one technical scheme which can achieve the following beneficial effects:
according to the embodiment of the invention, the acquisition module is used for acquiring the rotating speed and the voltage of the generator, the control module is used for receiving the rotating speed and the voltage sent by the acquisition module, if the rotating speed and the voltage meet the preset conditions, the execution module is used for generating the execution instruction, the execution module is used for receiving the execution instruction sent by the control module, and the operation of disconnecting the outlet switch is executed according to the execution instruction, so that the generator can be prevented from being changed into the motor, and the generator can be prevented from being burnt.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the embodiments of the invention and, together with the description, serve to explain the principles of the embodiments of the invention.
Fig. 1 is a schematic structural diagram of a generator protection device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a generator protection method according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments, features and aspects of embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of embodiments of the invention. It will be understood by those skilled in the art that the embodiments of the invention may be practiced without these specific details. In other instances, well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the embodiments of the invention.
Fig. 1 is a schematic structural diagram of a generator protection device according to an embodiment of the present invention, where the generator protection device 100 may include: an acquisition module 10, a control module 20 and an execution module 30. The following respectively describes the connection relationship and the working relationship among the acquisition module 10, the control module 20, and the execution module 30 in detail, specifically:
the control module 20 is electrically connected with the acquisition module 10, and the execution module 30 is electrically connected with the control module 20 and the outlet switch 41 of the generator 40 respectively. The collecting module 10 is used for collecting the rotation speed of the generator 40 and the voltage of the generator 40. The control module 20 is configured to receive the rotation speed and the voltage sent by the acquisition module 10, and generate an execution instruction if the rotation speed and the voltage meet preset conditions. The execution module 30 is configured to receive an execution instruction sent by the control module 20, and execute an operation of turning off the outlet switch 41 according to the execution instruction.
Specifically, the preset condition may include: the rotation speed is less than the first threshold value and the voltage is greater than the second threshold value. Wherein the first threshold value is 3000r/min, and the second threshold value is any value between 20V and 30V.
In specific implementation, if the rotation speed of the generator 40 acquired by the acquisition module 10 is less than 3000r/min and the voltage of the generator 40 is greater than any value between 20V and 30V, it may be determined that the generator 40 is in a shutdown state, in order to prevent the generator 40 from being operated by mistake so that the generator 40 becomes a motor, the control module 20 generates an execution instruction, and the execution module 30 executes an operation of turning off the outlet switch 41 according to the execution instruction.
The control module 20 may be a CPU, the acquisition module 10 may be a sampling board, and the execution module 30 may be a relay, and of course, the modules may also adopt other circuits or electric devices having corresponding functions, which are not listed here.
For example, the execution module 30 described in the above embodiments may include: a relay. The field coil of the relay is electrically connected to the control module 20, and one normally open contact of the relay is electrically connected to the trip coil of the outlet switch 41. The relay receives an execution instruction sent by the control module 20, a normally open contact is closed, and at this time, a trip coil of the outlet switch 41 is tripped after being electrified to disconnect the outlet switch 41.
For example, the acquisition module 10 described in the above embodiments may include: mutual-inductor and voltage sampling board. One end of the transformer is electrically connected with the generator 40, and the voltage sampling plate is electrically connected with the control module 20 and the other end of the transformer respectively. Wherein, the mutual inductor converts the strong current output by the generator 40 into weak current, and the voltage sampling plate collects the weak current voltage.
The acquisition module 10 may further include: a sensor. The sensor is used to acquire the rotational speed of the generator 40. The sensor may be a capacitive sensor or a variable reluctance sensor. Of course, other acquisition circuits or acquisition devices with corresponding functions in the prior art may also be used, and embodiments of the present invention are not listed here.
Further, in order to facilitate a worker to intuitively know the state of the motor so as to play a role of reminding, the generator protection device provided by the embodiment of the invention may further include: a display module 50. The display module 50 is electrically connected to the control module 20, and the display module 50 is used for displaying the rotation speed and the voltage received by the control module 20.
According to the embodiment of the invention, the acquisition module is used for acquiring the rotating speed and the voltage of the generator, the control module is used for receiving the rotating speed and the voltage sent by the acquisition module, if the rotating speed and the voltage meet the preset conditions, the execution module is used for generating the execution instruction, the execution module is used for receiving the execution instruction sent by the control module, and the operation of disconnecting the outlet switch is executed according to the execution instruction, so that the generator can be prevented from being changed into the motor, and the generator can be prevented from being burnt.
Fig. 2 is a schematic flow chart of a generator protection method according to an embodiment of the present invention, where the method includes:
The step can be realized specifically by converting strong current output by the generator into weak current through the mutual inductor, and collecting the weak current voltage by the voltage sampling plate; the rotating speed of the generator is acquired through the sensor.
And 102, if the rotating speed and the voltage meet preset conditions, generating an execution instruction.
The preset conditions may include: the rotation speed is less than the first threshold value and the voltage is greater than the second threshold value. Wherein the first threshold value is 3000r/min, and the second threshold value is any value between 20V and 30V.
The step can be specifically realized in such a way that if the rotating speed of the generator acquired by the acquisition module is less than 3000r/min and the voltage of the generator is greater than any value between 20V and 30V, the generator can be determined to be in a shutdown state, the control module generates an execution instruction, and the execution instruction is an instruction for preventing the generator from being mistakenly operated to turn into a motor.
And 103, according to the execution instruction, executing the operation of disconnecting the outlet switch of the generator.
The step may be specifically implemented as follows: a relay. The excitation coil of the relay is electrically connected with the control module, and one normally-open contact of the relay is electrically connected with the tripping coil of the outlet switch. The relay receives an execution instruction sent by the control module, one normally open contact is closed, and at the moment, the tripping coil of the outlet switch trips to disconnect the outlet switch after being electrified.
According to the embodiment of the invention, the rotating speed of the generator and the voltage of the generator are collected, if the rotating speed and the voltage meet the preset conditions, the execution instruction is generated, and the operation of disconnecting the outlet switch is executed according to the execution instruction, so that the generator can be prevented from being changed into the motor, and the generator can be prevented from being burnt.
The above description is only a specific implementation of the embodiments of the present invention, but the scope of the embodiments of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the embodiments of the present invention, and all such changes or substitutions should be covered by the scope of the embodiments of the present invention. Therefore, the protection scope of the embodiments of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A generator protection device, comprising:
the acquisition module is used for acquiring the rotating speed of the generator and the voltage of the generator;
the control module is electrically connected with the acquisition module and used for receiving the rotating speed and the voltage sent by the acquisition module, and if the rotating speed and the voltage meet preset conditions, an execution instruction is generated;
and the execution module is respectively electrically connected with the control module and the outlet switch of the generator, and is used for receiving the execution instruction sent by the control module and executing the operation of disconnecting the outlet switch according to the execution instruction.
2. Generator protection device according to claim 1, characterized in that said preset conditions comprise: the rotation speed is less than the first threshold value and the voltage is greater than the second threshold value.
3. The generator protection device of claim 1, wherein the first threshold is 3000r/min and the second threshold is any value between 20V-30V.
4. The generator protection device of claim 1, wherein the execution module comprises:
a relay, an excitation coil of which is electrically connected with the control module, and a normally-open contact of which is electrically connected with a tripping coil of the outlet switch;
the relay receives an execution instruction sent by the control module, the normally open contact is closed, and at the moment, the tripping coil of the outlet switch trips to disconnect the outlet switch after being electrified.
5. The generator protection device of claim 1, wherein the acquisition module comprises:
the transformer is electrically connected with the generator at one end and used for converting strong current output by the generator into weak current;
the voltage sampling plate is electrically connected with the control module and the other end of the mutual inductor respectively and is used for collecting the weak current voltage;
a sensor for acquiring a rotational speed of the generator.
6. The generator protection device of claim 1, further comprising:
and the display module is electrically connected with the control module and is used for displaying the rotating speed and the voltage received by the control module.
7. A method of protecting a generator, comprising:
collecting the rotating speed of a generator and the voltage of the generator;
if the rotating speed and the voltage meet preset conditions, generating an execution instruction;
and according to the execution instruction, executing the operation of opening an outlet switch of the generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010188592.XA CN111431144A (en) | 2020-03-17 | 2020-03-17 | Generator protection device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010188592.XA CN111431144A (en) | 2020-03-17 | 2020-03-17 | Generator protection device and method |
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| Publication Number | Publication Date |
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| CN111431144A true CN111431144A (en) | 2020-07-17 |
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| CN202010188592.XA Pending CN111431144A (en) | 2020-03-17 | 2020-03-17 | Generator protection device and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1556570A (en) * | 2004-01-05 | 2004-12-22 | 中国科学院广州能源研究所 | Protective method of oscillaton water column type wave energy device turbine electric generator set |
| CN203589682U (en) * | 2013-12-10 | 2014-05-07 | 贵州振华群英电器有限公司 | Three-phase power source over-current protection relay |
| CN204046140U (en) * | 2014-08-27 | 2014-12-24 | 郑州众智科技股份有限公司 | Inverse probability peculiar to vessel and overcurrent protection module |
| CN204290274U (en) * | 2014-11-12 | 2015-04-22 | 郑州众智科技股份有限公司 | Reverse power protection device |
| CN205610220U (en) * | 2016-05-16 | 2016-09-28 | 阿克苏舒奇蒙光伏发电有限公司 | Little electric anti -reverse connection circuit of photovoltaic |
-
2020
- 2020-03-17 CN CN202010188592.XA patent/CN111431144A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1556570A (en) * | 2004-01-05 | 2004-12-22 | 中国科学院广州能源研究所 | Protective method of oscillaton water column type wave energy device turbine electric generator set |
| CN203589682U (en) * | 2013-12-10 | 2014-05-07 | 贵州振华群英电器有限公司 | Three-phase power source over-current protection relay |
| CN204046140U (en) * | 2014-08-27 | 2014-12-24 | 郑州众智科技股份有限公司 | Inverse probability peculiar to vessel and overcurrent protection module |
| CN204290274U (en) * | 2014-11-12 | 2015-04-22 | 郑州众智科技股份有限公司 | Reverse power protection device |
| CN205610220U (en) * | 2016-05-16 | 2016-09-28 | 阿克苏舒奇蒙光伏发电有限公司 | Little electric anti -reverse connection circuit of photovoltaic |
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Application publication date: 20200717 |
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