Electrically-operated protective connecting piece device

Abstract

The utility model discloses an electric operation protection connecting piece device, which relates to the technical field of electric power system relay protection devices, and comprises an electric actuating mechanism, which comprises a motor and a transmission assembly, and the output end of the motor can realize axial displacement and radial rotation under the action of the transmission assembly; the connecting rod is driven by the electric actuating mechanism to realize axial displacement and radial rotation; the connecting piece body is arranged on the connecting rod and is matched with an electrical panel cabinet contact to realize on-off operation; the state monitoring module is used for monitoring the state of the connecting piece body; and the control module is used for controlling motor driving parameters and judging whether control is in place or not according to a monitoring result of the state monitoring module. According to the utility model, the switching efficiency of the protection connecting sheet can be improved, and one-key operation is realized; the risk of manual operation errors can be reduced, the safety of an electric power system is guaranteed, and meanwhile real-time monitoring and remote control of the operation state are achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of power system relay protection devices, specifically to an electrically operated protection interconnection device. Background Technology

[0002] The statements in this section are provided only as background information in connection with this disclosure and may not constitute prior art.

[0003] The existing relay protection device's interconnection control system adopts a mechanical operating structure, which relies on a physical contact mechanism consisting of the interconnection body, fixed brackets, and manual operating levers. Operators must manually push and pull the operating levers to control the on / off state of the contacts. This technical solution has the following inherent drawbacks: First, operational efficiency is limited by the manual operation mode. Especially in complex systems with multi-level interconnection structures, manual operation of each interconnection significantly increases the time required for the on / off process, making it difficult to meet the rapid operation requirements of power systems. Second, operational reliability is greatly affected by human factors. Problems such as interconnection misalignment and poor contact can easily occur during the pushing and pulling process, increasing the risk of malfunction or failure to operate the protection device. Third, long-term use of the mechanical structure is prone to wear due to frequent insertion and removal, resulting in abnormally increased contact resistance, shortening the equipment's lifespan and increasing maintenance frequency.

[0004] More importantly, existing technologies lack effective status feedback mechanisms, making it impossible to monitor the actual contact status of interconnected areas in real time after operation, thus posing hidden operational safety hazards. As smart substations increasingly demand remote controllability and status visualization of protection equipment, traditional manual operation modes are no longer sufficient to meet the technological requirements of modern power system intelligent development. Utility Model Content

[0005] The purpose of this utility model is to provide an electrically operated protection connecting plate device to address the problems existing in the prior art, thereby solving the aforementioned problems.

[0006] The technical solution of this utility model is as follows:

[0007] An electrically operated protection interlocking device, comprising:

[0008] An electric actuator includes a motor and a transmission assembly, wherein the output end of the motor can achieve axial displacement and radial rotation under the action of the transmission assembly;

[0009] The connecting rod is driven by the electric actuator to achieve axial displacement and radial rotation;

[0010] The main body is mounted on the connecting rod and works with the contacts of the electrical control panel to achieve on / off operation;

[0011] The status monitoring module is used to monitor the status of the continuous body.

[0012] The control module is used to control the motor drive parameters and can also determine whether the control is in place based on the monitoring results of the status monitoring module.

[0013] Further, the transmission assembly includes:

[0014] A lead screw and nut mechanism that converts rotary motion into axial displacement and a worm gear mechanism that achieves radial rotation.

[0015] Furthermore, the axial travel of the lead screw and nut mechanism is ±15mm, and the rotation angle of the worm gear mechanism is 45°.

[0016] Furthermore, the end of the connecting rod is provided with an elastic contact, and the connecting plate body is mounted on the elastic contact.

[0017] Furthermore, the status monitoring module includes:

[0018] A pressure sensor and a position encoder are provided, wherein the pressure sensor is used to detect the contact pressure at the contact point, and the position encoder is used to detect the displacement of the connecting rod.

[0019] Furthermore, the contact pressure threshold of the elastic contact is 10N, and the position lock is triggered when the pressure sensor detects a pressure value ≥10N.

[0020] Furthermore, the control module integrates an RS485 communication interface, supporting communication with the substation automation system via the MODBUS protocol.

[0021] Furthermore, the electric actuator and the connecting rod are also provided with limit devices to limit the rotation angle of the connecting rod.

[0022] Furthermore, the control module includes a microprocessor and a drive circuit.

[0023] This utility model also proposes a control method for an electrically operated protection interlocking device, including:

[0024] Operation steps:

[0025] Step S1: The motor drives the connecting rod to extend axially to the set stroke;

[0026] Step S2: Rotate the drive rod 45° clockwise to complete the contact engagement;

[0027] Step S3: Lock the current position when the pressure sensor detects a contact pressure ≥10N;

[0028] Exit procedure:

[0029] Step A: Rotate the drive linkage counterclockwise by 45° to disengage from the contact point;

[0030] Step B: Control the connecting rod to retract axially to its initial position;

[0031] Step C: Feedback the operation completion signal through the position encoder;

[0032] It also includes: interlocking control steps:

[0033] When putting the equipment into operation, the mandatory sequence is functional interconnection → output interconnection;

[0034] When exiting the operation, the forced sequence is export connection → function connection.

[0035] Compared with existing technologies, the beneficial effects of this utility model are:

[0036] 1. Operation efficiency is improved by more than 80%, and the operation time of a single system is shortened to within 10 seconds.

[0037] 2. Eliminate the risk of human error and ensure the reliability of relay protection.

[0038] 3. Supports remote monitoring and automated operation and maintenance, reducing labor costs. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of an electrically operated protection interlocking device;

[0040] Figure 2 This is the operation control flowchart;

[0041] Figure 3 This demonstrates the main control algorithm for the operation sequence.

[0042] Reference numerals: 1-motor, 2-connecting rod, 3-connecting plate body, 4-limiting device. Detailed Implementation

[0043] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0045] Example 1

[0046] Please see Figure 1 An electrically operated protection interlocking device specifically includes the following structure:

[0047] The electric actuator includes a motor and a transmission assembly. The output end of the motor can achieve axial displacement and radial rotation under the action of the transmission assembly; that is, the axial displacement and radial rotation of the connecting rod are achieved through precise control. It should be noted that the motor is driven by a 24V DC servo motor (power 50W), and the rotational motion is converted into axial displacement of the connecting rod (stroke ±15mm) through a precision lead screw nut, which, together with the worm gear, achieves 45° radial rotation.

[0048] The connecting rod is driven by the electric actuator to achieve axial displacement and radial rotation;

[0049] The main body is mounted on the connecting rod and works with the contacts of the electrical control panel to achieve on / off operation;

[0050] The status monitoring module is used to monitor the status of the continuous body.

[0051] The control module is used to control the motor drive parameters and can also determine whether the control is in place based on the monitoring results of the status monitoring module.

[0052] In this embodiment, specifically, the transmission assembly includes:

[0053] A lead screw and nut mechanism that converts rotary motion into axial displacement and a worm gear mechanism that realizes radial rotation;

[0054] It should be noted that the axial displacement and radial rotation achieved through the lead screw and nut mechanism and the worm gear mechanism are existing technologies known to those skilled in the art, and will not be elaborated upon here.

[0055] In this embodiment, specifically, the axial travel of the lead screw and nut mechanism is ±15mm, and the rotation angle of the worm gear mechanism is 45°.

[0056] In this embodiment, specifically, the end of the connecting rod is provided with an elastic contact, and the connecting plate body is mounted on the elastic contact.

[0057] In this embodiment, specifically, the status monitoring module includes:

[0058] A pressure sensor and a position encoder are provided, wherein the pressure sensor is used to detect the contact pressure at the contact point, and the position encoder is used to detect the displacement of the connecting rod.

[0059] In this embodiment, specifically, the contact pressure threshold of the elastic contact is 10N, and the position lock is triggered when the pressure sensor detects a pressure value ≥10N.

[0060] In this embodiment, specifically, the control module integrates an RS485 communication interface, supporting communication with the substation automation system via the MODBUS protocol; preferably, the control module is equipped with an STM32 microcontroller, integrating an RS485 communication interface that supports the MODBUS protocol, and can be connected to the substation automation system.

[0061] In this embodiment, specifically, the electric actuator and the connecting rod are also provided with a limit device to limit the rotation angle of the connecting rod; it should be noted that, for example, a limit device can be provided. Figure 1 The aforementioned limiting rod can be used for limiting, but other limiting devices can also be used for limiting, which are not limited here.

[0062] In this embodiment, specifically, the control module includes a microprocessor and a drive circuit.

[0063] The working principle of the electrically operated protection interlocking device proposed above is as follows:

[0064] When it is necessary to disconnect the connecting piece, the motor drives the connecting rod to extend axially by a certain length, and then rotates counterclockwise radially by 45 degrees to disconnect from the contacts on the electrical panel.

[0065] When the connecting piece is engaged, the motor first rotates 45 degrees clockwise radially, and then controls the connecting rod to shorten axially by a certain length, which is the operation of engaging the connecting piece.

[0066] Example 2

[0067] Example 2 is an electrically operated protection interlocking device based on Example 1, such as... Figure 2 and Figure 3 As shown, a control method is also proposed, as detailed below.

[0068] A control method for an electrically operated protection interlocking device includes:

[0069] Operation steps:

[0070] Step S1: The motor drives the connecting rod to extend axially to the set stroke;

[0071] Step S2: Rotate the drive rod 45° clockwise to complete the contact engagement;

[0072] Step S3: Lock the current position when the pressure sensor detects a contact pressure ≥10N;

[0073] Exit procedure:

[0074] Step A: Rotate the drive linkage counterclockwise by 45° to disengage from the contact point;

[0075] Step B: Control the connecting rod to retract axially to its initial position;

[0076] Step C: Feedback operation completion signal via position encoder.

[0077] In this embodiment, it should be noted that the motor operation control logic further includes:

[0078] 1. One-click activation or deactivation of the protection exit network;

[0079] 2. One-click activation or deactivation of all protection functions;

[0080] 3. Exiting single protection network, etc.

[0081] This also includes: interlocking control steps:

[0082] 1. When installing interconnected sections, the functional interconnected sections must be installed first, followed by the export interconnected sections;

[0083] 2. When exiting a connecting section, you must first exit the exit connecting section, and then exit the functional connecting section.

[0084] When the connection between the panel and the electrical control cabinet comes into contact or disconnects, the relevant status signal is sent to the computer monitoring system.

[0085] Operating modes: Supports single-chip operation, whole-group operation, and group operation according to protection function.

[0086] Lockout logic: During operation, the sequence of function connections → output connections is locked. During operation, the sequence of output connections → function connections is locked.

[0087] Safety mechanism: The operation will be automatically interrupted and an alarm will be triggered if the timeout exceeds 10 seconds.

[0088] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

[0089] The background section is provided to generally present the context of this utility model. The work of the currently named inventors, the work to the extent described in this background section, and aspects described in this section that did not constitute prior art at the time of filing are neither expressly nor impliedly acknowledged as prior art to this utility model.

Claims

1. An electrically operated protection interlocking device, characterized in that, include: An electric actuator includes a motor and a transmission assembly, wherein the output end of the motor can achieve axial displacement and radial rotation under the action of the transmission assembly; The connecting rod is driven by the electric actuator to achieve axial displacement and radial rotation; The main body is mounted on the connecting rod and works with the contacts of the electrical control panel to achieve on / off operation; The status monitoring module is used to monitor the status of the continuous body. The control module is used to control the motor drive parameters and can also determine whether the control is in place based on the monitoring results of the status monitoring module.

2. The electrically operated protection interlocking device according to claim 1, characterized in that, The transmission assembly includes: A lead screw and nut mechanism that converts rotary motion into axial displacement and a worm gear mechanism that achieves radial rotation.

3. The electrically operated protection interlocking device according to claim 2, characterized in that, The axial travel of the lead screw and nut mechanism is ±15mm, and the rotation angle of the worm gear mechanism is 45°.

4. The electrically operated protection interlocking device according to claim 1, characterized in that, The connecting rod end is provided with an elastic contact, and the connecting plate body is mounted on the elastic contact.

5. The electrically operated protection interlocking device according to claim 4, characterized in that, The status monitoring module includes: A pressure sensor and a position encoder are provided, wherein the pressure sensor is used to detect the contact pressure at the contact point, and the position encoder is used to detect the displacement of the connecting rod.

6. The electrically operated protection interlocking device according to claim 5, characterized in that, The contact pressure threshold of the elastic contact is 10N. When the pressure sensor detects a pressure value ≥10N, position locking is triggered.

7. The electrically operated protection interlocking device according to claim 1, characterized in that, The control module integrates an RS485 communication interface and supports communication with the substation automation system via the MODBUS protocol.

8. The electrically operated protection interlocking device according to claim 1, characterized in that, The electric actuator and the connecting rod are also equipped with limit devices to limit the rotation angle of the connecting rod.

9. The electrically operated protection interlocking device according to claim 1, characterized in that, The control module includes a microprocessor and a drive circuit.

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