阅读说明：本技术 一种发电机保护装置及方法 (Generator protection device and method ) 是由 李勇 于 2020-03-17 设计创作，主要内容包括：本发明实施例提出了一种发电机保护装置及方法,该发电机保护装置包括：采集模块,用于采集发电机的转速和所述发电机的电压；控制模块,与所述采集模块电连接,用于接收所述采集模块发送的转速和电压,若所述转速和电压满足预设条件,则生成执行指令；执行模块,其分别与所述控制模块和所述发电机的出口开关电连接,用于接收所述控制模块发送的所述执行指令,根据所述执行指令执行断开所述出口开关的操作,能够防止发电机变成电动机,以防止发电机烧损。(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.)

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.

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.