Remote control device and method for circuit breaker switching operation mode

Abstract

This invention provides a remote control operating device and method for switching operation modes of a circuit breaker. The device includes a control module, a handle position detection module, a handle position conversion module, and a wireless communication module. The handle position detection module acquires handle position detection signals from at least two types of circuit breakers. The wireless communication module uploads the detection results of the handle position to a monitoring terminal and receives handle position conversion commands. The handle position conversion module is used to change the handle position of the circuit breaker. The control module generates the detection results of the handle position and controls the handle position conversion module to change the handle position of the circuit breaker. This remote control operating device uses at least two detection signals to identify the handle position, interacts with a remote monitoring terminal, and remotely switches the handle position between remote and local operation modes of the circuit breaker, reducing the manpower required for substation maintenance.

Description

Technical Field

[0001] This invention belongs to the field of circuit breaker technology, specifically relating to a remote control operation device and method for switching operation modes of a circuit breaker. Background Technology

[0002] Circuit breakers are one of the essential components in switchgear. They are used to interrupt or close current. With the continuous development and improvement of power automation systems, unmanned substations are being used more and more. To adapt to this change, in existing substations, the opening and closing of circuit breakers can be remotely controlled, that is, operated remotely through a monitoring system, thus eliminating the need for personnel to be on-site and achieving unmanned operation. However, the change from remote to on-site operation of circuit breakers still requires personnel to be on-site, which greatly affects the efficiency of unmanned operation of substations and increases the pressure on operation and maintenance. Summary of the Invention

[0003] In view of this, the present invention aims to solve the problem that the existing remote control operation of circuit breakers in substations requires personnel to be on-site for remote and local operation, which greatly affects the efficiency of unmanned operation of substations and increases the pressure of operation and maintenance.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] In a first aspect, the present invention provides a remote control operating device for switching operation modes of a circuit breaker, comprising: a control module, a handle position detection module, a handle position conversion module, and a wireless communication module;

[0006] The handle position detection module is used to acquire handle position detection signals from at least two types of circuit breakers.

[0007] The wireless communication module is used to upload the detection results of the handle position to the monitoring terminal; it is also used to receive the handle position change command issued by the monitoring terminal.

[0008] The handle position conversion module is connected to the handle conversion shaft of the circuit breaker to change the handle position of the circuit breaker;

[0009] The control module is used to generate a detection result of the handle position based on at least two handle position detection signals; it is also used to control the handle position conversion module to change the handle position of the circuit breaker according to the handle position conversion command.

[0010] Furthermore, the handle position detection module specifically includes: a position auxiliary contact signal detection module;

[0011] The position auxiliary contact signal detection module is used to obtain the detection signal when the handle is in a remote operation position or a local operation position by using the auxiliary contact set in the circuit breaker handle position. The auxiliary contact generates two different signals when the handle is in a remote operation position or a local operation position.

[0012] Furthermore, the handle position detection module also includes: a photoelectric pair signal detection module;

[0013] The photoelectric pair signal detection module is used to obtain the detection signal when the handle is in a remote or local operating position by using the photoelectric pair set at the position of the circuit breaker handle. The photoelectric pair generates two different signals when the handle is in a remote or local operating position.

[0014] Furthermore, the control module is used to generate a handle position detection result based on at least two handle position detection signals, specifically as follows:

[0015] The control module receives detection signals from the position auxiliary contact signal detection module and the photoelectric pair signal detection module. If two detection signals are received simultaneously and both signals indicate the same handle position, the detection result corresponding to the handle position at that time is generated.

[0016] Furthermore, the monitoring terminal determines the handle position switching command based on the handle position information. The process of determining the handle position information is as follows:

[0017] The monitoring terminal compares the locally acquired handle position status with the handle position detection result. If they match, handle position information is generated. The handle position status is generated by the monitoring terminal based on the detection signal of the on-site circuit breaker handle position.

[0018] Secondly, the present invention provides a remote control operation method for switching operation modes of a circuit breaker. The remote control operation method is implemented by a remote control position switching mechanism at a monitoring terminal. The position switching mechanism is connected to the switching shaft of the circuit breaker handle, and includes the following steps:

[0019] The monitoring terminal determines the handle position switching command based on the handle position detection result, which is generated based on at least two handle position detection signals;

[0020] The position switching mechanism is controlled to switch the position of the circuit breaker handle according to the handle position switching command.

[0021] Furthermore, an auxiliary contact is installed at the circuit breaker handle position. This auxiliary contact is specifically used for:

[0022] Two different voltage signals are generated when the handle is in the remote operation position or the local operation position.

[0023] Furthermore, a photoelectric pair is installed at the circuit breaker handle position. The photoelectric pair is specifically used for:

[0024] Two different detection signals are generated when the handle is in a remote operation position or a local operation position.

[0025] Furthermore, the specific steps for generating the handle position detection result based on at least two handle position detection signals are as follows:

[0026] Determine whether two detection signals are received simultaneously and whether both signals indicate the same handle position. If so, generate the detection result corresponding to the handle position at that time.

[0027] Furthermore, the monitoring terminal determines the handle position switching command based on the handle position information. The process of determining the handle position information is as follows:

[0028] The monitoring terminal compares the locally acquired handle position status with the handle position detection result. If they match, handle position information is generated. The handle position status is generated by the monitoring terminal based on the detection signal of the on-site circuit breaker handle position.

[0029] In summary, this invention provides a remote control operating device and method for switching operation modes of a circuit breaker. The device includes a control module, a handle position detection module, a handle position conversion module, and a wireless communication module. The handle position detection module acquires at least two types of handle position detection signals from the circuit breaker. The wireless communication module uploads the handle position detection results to a monitoring terminal and receives handle position conversion commands from the monitoring terminal. The handle position conversion module connects to the handle conversion shaft of the circuit breaker to change the handle position. The control module generates handle position detection results based on the at least two types of handle position detection signals and controls the handle position conversion module to change the handle position of the circuit breaker according to the handle position conversion commands from the monitoring terminal. This remote control operating device uses at least two types of detection signals to identify the handle position, interacts with a remote monitoring terminal, and remotely switches the handle position between remote and local operation modes of the circuit breaker. This avoids the problem of requiring personnel to be on-site to change the remote or local operation mode when performing remote control operation of circuit breakers in existing substations. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a structural block diagram of a remote control operating device for switching operation modes of a circuit breaker, provided in an embodiment of the present invention.

[0032] Figure 2 This is a structural diagram of the remote control operation device provided in an embodiment of the present invention;

[0033] Figure 3 This is a flowchart illustrating a remote control operation method for switching operation modes of a circuit breaker, as provided in an embodiment of the present invention.

[0034] In the attached diagram: 1-Operating handle, 2-Panel, 3-Servo motor and controller, 4-Power input terminal, 5-Handle position detector, 6-Mounting bracket, 7-Screw hole, 8-Servo motor output shaft, 9-Existing circuit breaker remote / local operating handle, 10-Switch cabinet or panel cabinet mounting hole, 11-Panel of the existing circuit breaker remote / local operating handle. Detailed Implementation

[0035] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0036] Circuit breakers are one of the essential components in switchgear. They are used to interrupt or close current. With the continuous development and improvement of power automation systems, unmanned substations are being used more and more. To adapt to this change, in existing substations, the opening and closing of circuit breakers can be remotely controlled, that is, operated remotely through a monitoring system, thus eliminating the need for personnel to be on-site and achieving unmanned operation. However, the change from remote to on-site operation of circuit breakers still requires personnel to be on-site, which greatly affects the efficiency of unmanned operation of substations and increases the pressure on operation and maintenance.

[0037] Based on this, the present invention provides a remote control operation device and method for switching operation modes of a circuit breaker.

[0038] The following is a detailed description of an embodiment of a remote control operating device for circuit breaker switching operation mode according to the present invention.

[0039] Please see Figure 1 This embodiment provides a remote control operating device for switching operation modes of a circuit breaker, including: a control module, a handle position detection module, a handle position conversion module, and a wireless communication module.

[0040] In this embodiment, the handle position detection module is used to acquire handle position detection signals of at least two types of circuit breakers.

[0041] Understandably, the original method of switching the remote / local operation of circuit breakers in the switch cabinet was achieved by rotating the handle to the corresponding position. To enable remote control operation of the handle position change, it is necessary to identify the handle's position.

[0042] In an optional embodiment, the handle position detection module includes a position auxiliary contact signal detection module. This module uses auxiliary contacts configured to detect whether the handle is in a remote or local operating position. The auxiliary contacts generate two different signals depending on whether the handle is in the remote or local operating position. Specifically, two sets of auxiliary contacts are configured for the handle. The first set of auxiliary contacts closes its normally open contacts and opens its normally closed contacts when the handle is in the remote operating position, generating a first remote position signal. The second set of auxiliary contacts closes its normally open contacts and opens its normally closed contacts when the handle is in the local operating position, generating a first local position signal.

[0043] To ensure the switch is fully engaged when the auxiliary contact generates a signal, the normally open contact of the auxiliary contact needs to close slightly later than the handle's engagement time in the actual design. The specific design of the auxiliary contact circuit is existing technology and will not be elaborated here.

[0044] In addition, to ensure the safety and accuracy of remote control operation of this device, the handle position detection module also includes a photoelectric sensor signal detection module. This module uses photoelectric sensors positioned on the circuit breaker handle to acquire detection signals indicating whether the handle is in a remote or local operating position. The photoelectric sensors generate two different signals depending on whether the handle is in the remote or local operating position. Specifically, two sets of photoelectric sensors are configured for the handle. The first set of photoelectric sensors faces the handle and generates a second remote position signal when the handle is in the remote operating position; the second set of photoelectric sensors faces the handle and generates a second local position signal when the handle is in the local operating position.

[0045] In this embodiment, the wireless communication module is used to upload the detection results of the handle position to the monitoring terminal; it is also used to receive the handle position conversion command sent by the monitoring terminal.

[0046] In this embodiment, the handle position conversion module is connected to the handle conversion shaft of the circuit breaker to change the handle position of the circuit breaker.

[0047] It should be noted that the remote control operating device in this embodiment mainly achieves handle position switching by controlling the rotation of the handle switching shaft. Therefore, the handle position switching module in this embodiment is fixedly connected to the switching shaft.

[0048] In this embodiment, the control module is used to generate a detection result of the handle position based on at least two handle position detection signals; it is also used to control the handle position conversion module to change the handle position of the circuit breaker according to the handle position conversion command issued by the monitoring terminal.

[0049] To ensure the accuracy of handle position detection and prevent misoperation, the control module needs to determine the position based on both auxiliary contact signals and photoelectric sensor signals. Specifically, when the control module simultaneously receives a first remote position signal and a second remote position signal (or a first local position signal and a second local position signal), it generates the detection result corresponding to the handle position at that moment as the remote operating position (or the local operating position).

[0050] Furthermore, the monitoring terminal compares the locally acquired handle position status with the handle position detection result. If they match, handle position information is generated. The handle position status is generated by the monitoring terminal based on the detection signal of the circuit breaker handle position on site, while the handle position signal is used by the monitoring terminal to determine the handle position conversion command at this time.

[0051] Based on the above design, this embodiment provides a remote control operation device. For example... Figure 2 As shown, the remote control operating device for circuit breaker remote and local operation modes includes an operating handle 1, a panel 2, a servo motor and controller 3, a power input terminal 4, a handle position detector 5, a mounting bracket 6, screw holes 7, and a servo motor output shaft 8. The operating handle 1 is for manual operation; manual rotation of the handle 1 enables manual operation. The panel 2 displays text indicating whether the circuit breaker is in remote or local operation mode. The servo motor and controller 3 drives the handle to the corresponding position. The handle position detector 5 detects the handle position. The mounting bracket 6 is used to install existing circuit breaker remote / local operation handles onto this device. The servo motor output shaft 8 connects to the existing circuit breaker remote / local operation handle's switching shaft.

[0052] The size of the mounting bracket 6 is larger than the original remote and local operating handles of the circuit breaker. The original remote and local operating handles of the circuit breaker are installed on the mounting bracket 6, and the mounting bracket 6 is fixed to the body by screws.

[0053] The servo motor output shaft 8 can rotate coaxially with the operating handle 1 and the original circuit breaker remote and local operating handle shafts; the operating part of the original circuit breaker remote and local operating handle 9 is removed, exposing the conversion shaft 12, and the servo motor output shaft 8 can be completely locked onto the original circuit breaker remote and local operating handle conversion shaft.

[0054] This device is installed on a switch cabinet or panel cabinet. Remove the operating part of the original circuit breaker remote / local operating handle 9 to expose the conversion shaft 12. The servo motor output shaft 8 is clamped onto the conversion shaft of the original circuit breaker remote / local operating handle 9. The mounting bracket 6 is installed between the panel 11 of the original circuit breaker remote / local operating handle and the mounting hole 10 of the switch cabinet or panel cabinet. The mounting bracket 6 is fixed to the main body of this device with screws 7. Then, the power supply is connected to the power supply terminal 4 of this device.

[0055] The handle position detector 5 is used to detect the handle position. It uses two methods to detect the handle position: auxiliary contact and photoelectric pair. After the auxiliary contact and photoelectric pair detect the handle position, they compare the handle position output with the target position received by the monitoring system from the servo motor and controller 3. The handle position can only be output when both the auxiliary contact and photoelectric pair detect the handle position simultaneously.

[0056] The device is connected to the substation monitoring system via a wireless module. Its operation steps are as follows: The monitoring system sends a command, which is transmitted to this device via the wireless transmitting module. Upon receiving the command, the wireless receiving module (located within the servo motor and controller 3) controls the servo motor to rotate. The servo motor output shaft 8 rotates, causing the operating handle 1 and the existing remote / local operating handle shafts of the circuit breaker to rotate. The operating handle 1 and the existing remote / local operating handle 9 of the circuit breaker rotate to their corresponding positions. The position detector 5 detects the handle position and compares the handle position output with the target position received by the monitoring system from the servo motor and controller 3. After confirming the handle is in position, a stop command is sent to the servo motor and controller 3, which then controls the servo motor to stop rotating, thus changing the remote / local operation mode of the circuit breaker.

[0057] This embodiment provides a remote control operating device for switching operation modes of a circuit breaker, including a control module, a handle position detection module, a handle position conversion module, and a wireless communication module. The handle position detection module acquires handle position detection signals from at least two types of circuit breakers; the wireless communication module uploads the detection results of the handle position to a monitoring terminal and receives handle position conversion commands sent by the monitoring terminal; the handle position conversion module is connected to the handle conversion shaft of the circuit breaker to change the handle position of the circuit breaker; the control module generates the handle position detection results based on the at least two types of handle position detection signals and controls the handle position conversion module to change the handle position of the circuit breaker according to the handle position conversion commands. The remote control operating device of this invention uses at least two detection signals to identify the handle position, interacts with a remote monitoring terminal, and remotely realizes the switching of the handle position between remote and local operation modes of the circuit breaker.

[0058] The above is a detailed description of an embodiment of a remote control operation device for a circuit breaker switching operation mode according to the present invention. The following will provide a detailed description of an embodiment of a remote control operation method for a circuit breaker switching operation mode according to the present invention.

[0059] Please see Figure 3 This embodiment provides a remote control operation method for switching operation modes of a circuit breaker. This remote control operation method is implemented by a remote control position conversion structure at the monitoring end. The position conversion structure is connected to the conversion shaft of the circuit breaker handle and includes the following steps:

[0060] S100: The monitoring terminal generates a handle position conversion command based on the handle position detection result. The handle position detection result is generated based on at least two handle position detection signals.

[0061] It should be noted that position detection is achieved by setting auxiliary contacts and phototransistors at the circuit breaker handle position. The auxiliary contacts and phototransistors are used to generate two different voltage signals when the handle is in the remote operation position or the local operation position, respectively.

[0062] In this embodiment, the detection result corresponding to the handle position at this time is generated by determining whether two detection signals are received simultaneously and both detection signals indicate the same handle position.

[0063] S200: Controls the position switching mechanism to switch the position of the circuit breaker handle according to the handle position switching command.

[0064] In addition, the monitoring terminal determines the handle position switching command based on the handle position information. Specifically, the monitoring terminal compares the handle position status obtained locally with the handle position detection result. If they match, handle position information is generated. The handle position status is generated by the monitoring terminal based on the detection signal of the circuit breaker handle position on site.

[0065] It should be noted that the remote control operation method provided in this embodiment is based on the remote control operation device provided in the foregoing embodiment. The specific implementation of each step is based on the function provided by the device in the foregoing embodiment, and will not be repeated here.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A remote control operating device for switching operation modes of a circuit breaker, characterized in that, include: The system includes a control module, a handle position detection module, a handle position conversion module, and a wireless communication module. The handle position detection module is used to acquire handle position detection signals of at least two types of circuit breakers; The wireless communication module is used to upload the detection results of the handle position to the monitoring terminal; it is also used to receive the handle position conversion command issued by the monitoring terminal. The handle position conversion module is connected to the handle conversion shaft of the circuit breaker and is used to change the handle position of the circuit breaker. The control module is used to generate a detection result of the handle position based on at least two handle position detection signals; it is also used to control the handle position conversion module to change the handle position of the circuit breaker according to the handle position conversion command; the at least two handle position detection signals include at least a handle position auxiliary contact signal and a photoelectric pair signal. The handle position detection module specifically includes: a position auxiliary contact signal detection module; The position auxiliary contact signal detection module is used to obtain the detection signal of the handle being in a remote operation position or a local operation position by using the auxiliary contact set at the position of the circuit breaker handle. The auxiliary contact generates two different signals when the handle is in a remote operation position or a local operation position. The handle position detection module further includes: a photoelectric pair signal detection module; The photoelectric pair signal detection module is used to acquire the detection signal of the handle being in a remote operation position or a local operation position by using the photoelectric pair set at the position of the circuit breaker handle. The photoelectric pair generates two different signals when the handle is in a remote operation position or a local operation position.

2. The remote control operating device for switching operation modes of a circuit breaker according to claim 1, characterized in that, The control module is used to generate the detection result of the handle position based on the at least two handle position detection signals, specifically as follows: The control module receives detection signals from the position auxiliary contact signal detection module and the photoelectric pair signal detection module. If two detection signals are received simultaneously and both signals indicate the same handle position, a detection result corresponding to the handle position at that time is generated.

3. The remote control operating device for switching operation modes of a circuit breaker according to claim 2, characterized in that, The monitoring terminal determines the handle position conversion command based on the handle position information. The process of determining the handle position information is as follows: The monitoring terminal compares the locally acquired handle position status with the detection result of the handle position. If they match, the handle position information is generated. The handle position status is generated by the monitoring terminal based on the detection signal of the on-site circuit breaker handle position.

4. A remote control operation method for switching operation modes of a circuit breaker, characterized in that, The remote control operation method is implemented by a remote control position switching mechanism at the monitoring terminal. The position switching mechanism is connected to the switching shaft of the circuit breaker handle and includes the following steps: An auxiliary contact is provided at the circuit breaker handle position, and the auxiliary contact is specifically used for: Two different voltage signals are generated when the handle is in the remote operation position or the local operation position, respectively. A photoelectric pair is installed at the circuit breaker handle position, and the photoelectric pair is specifically used for: Two different detection signals are generated when the handle is in a remote operation position or a local operation position; The monitoring terminal determines the handle position conversion command based on the handle position detection result, which is generated based on at least two handle position detection signals; the at least two handle position detection signals include at least the handle position auxiliary contact signal and the photoelectric pair signal. The position switching mechanism is controlled to switch the position of the circuit breaker handle according to the handle position switching command; The specific method for generating the handle position detection result based on at least two handle position detection signals is as follows: Determine whether two detection signals are received simultaneously and whether both detection signals indicate the same handle position. If so, generate the detection result corresponding to the handle position at this time. The monitoring terminal determines the handle position conversion command based on the handle position information. The process of determining the handle position information is as follows: The monitoring terminal compares the locally acquired handle position status with the detection result of the handle position. If they match, the handle position information is generated. The handle position status is generated by the monitoring terminal based on the detection signal of the on-site circuit breaker handle position.

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