Primary equipment operation switching device

Abstract

The invention provides a primary equipment operation switching device. The primary equipment operation switching device comprises a body and a pluggable wiring terminal strip, one side of the wiring terminal strip is connected with a plurality of groups of normally open contacts and a plurality of groups of normally closed contacts on the switch, the disconnecting link and the grounding knife; the body is provided with a CPU board, a switching potential transmission board connected with the CPU board and four main buttons. The switching potential transmission plate is provided with a clamping groove which is used for realizing hot plugging of the other side of the wiring terminal strip. Each main button triggers one of a remote function, a local function, a stop function and a maintenance function and generates a corresponding analog signal when a user presses down the main button for odd times, or interrupts any function triggering when the user presses down the main button for even times; the CPU board determines the on-off states of normally open or / and normally closed contacts on the switch, the disconnecting link and the grounding switch according to the analog signals, and converts the on-off states into potential signals to be issued; the switching potential transmission board receives potential signals to switch the normally-open or / and normally-closed contacts on the wiring terminal strip so as to realize function transmission. According to the invention, the service life and convenience can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a primary equipment operation switching device. Background Art

[0002] The primary equipment in the power system substation often needs to be shut down and the system mode adjusted. When operating the primary equipment, the operators usually operate remotely at the operator workstation or from the dispatch end. Sometimes, the operators also operate on-site in the local control cabinet.

[0003] At present, primary equipment operation switching devices are widely used, mainly for the opening and closing operation switching of switches, knife switches and earth switches on the lines connected to the primary equipment. For example, the number of primary equipment operation switching devices used in 110kV substations is about 49, the number of primary equipment operation switching devices used in 220kV substations is about 88, and the number of primary equipment operation switching devices used in 500kV substations is about 150.

[0004] However, there are great differences in the manufacturers, product quality, secondary wiring, and working principles involved in the numerous primary equipment operation switching devices. When used in conjunction with the actual application of the substation, the design drawings are also quite different due to the different signals of the control cabinet and the measurement and control device. Therefore, when replacing the primary equipment operation switching device, the technical skills level of the on-site staff is required to be high, and the risk to personnel and the power grid during the replacement process is relatively high.

[0005] In the prior art, the traditional primary equipment operation switching device is mainly divided into several gears, namely remote, local, deactivation and maintenance, and each gear is equipped with several pairs of normally open contacts and normally closed contacts for users to use, and the gear is selected by turning the handle on site. At this time, the handle drives the change of the entire contact and gear through an iron rod that runs through the entire base. Once the iron rod is dislocated and stuck after long-term use, the primary equipment operation switching device will no longer be usable.

[0006] Therefore, in order to solve the above technical problems, it is necessary to improve the existing primary equipment operation switching device to increase its service life and convenience. Summary of the invention

[0007] The technical problem to be solved by the embodiments of the present invention is to provide a primary equipment operation switching device that can improve service life and convenience.

[0008] In order to solve the above technical problems, an embodiment of the present invention provides a primary equipment operation switching device, comprising a main body and a pluggable terminal block; wherein,

[0009] One side of the terminal block is connected to multiple groups of normally open contacts and multiple groups of normally closed contacts on switches, knife switches and ground switches connected to the primary equipment for operation switching;

[0010] The body comprises a shell; a CPU board and a switching potential transmission board are arranged inside the shell; four main buttons are arranged outside the shell; the CPU board is connected to the switching potential transmission board and the four main buttons; a card slot for hot-plugging the other side of the terminal block is arranged on the switching potential transmission board;

[0011] Each main button includes a pressed state and a reset state; each main button is used to be in the pressed state when the user presses it an odd number of times, so as to trigger a corresponding one of the remote, local, deactivation and maintenance functions and generate a corresponding analog signal; and, when the user presses it an even number of times, it is in the reset state to interrupt the corresponding function that has been triggered;

[0012] The CPU board is used to define the contacts of the received analog signal according to the preset signal-contact correspondence mapping table when receiving the analog signal generated by a main button, so as to determine the on-off state of each group of normally open contacts and normally closed contacts on the switch, knife switch and ground switch connected to the primary equipment, and process the determined on-off state of the contact into a corresponding potential signal, which is further sent to the switching potential transmission board; wherein the signal-contact correspondence mapping table is used to indicate the relationship between any one of the functions of remote, local, deactivation and maintenance and a group or more of normally open contacts and normally closed contacts on the switch, knife switch and ground switch connected to the primary equipment, and reflects the on-off state of the corresponding normally open contacts and normally closed contacts;

[0013] The switching potential transmission board is used to select the normally open contact or / and normally closed contact corresponding to the terminal block for switching operation when receiving the potential signal sent by the CPU board, so as to realize the transmission of a corresponding function among remote, local, deactivation and maintenance.

[0014] Among them, it also includes: at least one spare button connected to the CPU board; wherein,

[0015] Each standby button is arranged outside the shell, including a pressed state and a reset state; each standby button is used to standby the trigger function of a corresponding main button, and is in the pressed state when the user presses it an odd number of times, enabling a corresponding one of the remote, local, deactivated and maintenance functions triggered by the corresponding standby main button to generate a corresponding analog signal; and, when the user presses it an even number of times, it is in the reset state to interrupt the function triggered by the corresponding standby main button.

[0016] The backup of the triggering function of any standby button and the corresponding main button is achieved by the two generating the same analog signal.

[0017] It also includes: a display screen for human-computer interaction;

[0018] The display screen is arranged outside the shell and connected to the CPU board, and is used to receive user instructions to pre-build the signal and contact correspondence mapping table; and display the corresponding function triggered by the current main button and the on-off status of the normally open contacts and normally closed contacts on the switches, knife switches and ground switches connected to the primary equipment determined in the CPU board.

[0019] Among them, it also includes: a device button for human-computer interaction; among them,

[0020] The device button is arranged outside the shell and connected to the CPU board, and includes up, down, left, right, confirm, switch and exit buttons; the device button is used to switch the display mode and content of the display screen according to the button.

[0021] Among them, also include: power amplifier; among them,

[0022] The power amplifier is arranged outside the housing and connected to the CPU board, and is used to issue an alarm through sound or play the corresponding function triggered by the current main button.

[0023] Among them, it also includes: at least one data interface; wherein,

[0024] The data interface is a USB interface, which is arranged outside the housing and connected to the CPU board for data transmission.

[0025] Among them, it also includes: a cooling fan; among them,

[0026] The heat dissipation fan is arranged outside the housing and connected to the CPU board for heat dissipation.

[0027] Implementing the embodiments of the present invention has the following beneficial effects:

[0028] 1. Compared with the manual handle switching mode of the traditional primary equipment operation switching device, the primary equipment operation switching device of the present invention uses buttons to switch modes to select remote, local, deactivated and maintenance gears, which solves the problem that the primary equipment operation switching device can no longer be used due to the iron rod being disengaged and stuck after long-term use in the traditional primary equipment operation switching device, thereby improving the service life and convenience;

[0029] 2. The primary equipment operation switching device of the present invention adopts a fixed mode in the wiring terminal block to connect with multiple groups of normally open contacts and multiple groups of normally closed contacts used for operation switching on the switches, knife switches and ground switches connected to the primary equipment. Once a fault occurs, it is only necessary to pull out the primary equipment operation switching device body of the present invention from the terminal block for replacement, and then reinstall the new primary equipment operation switching device body on the terminal block, thereby avoiding the traditional cumbersome process and danger, while also reducing the possibility of errors, and further improving the service life and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0031] Figure 1 A distribution diagram of the external structure of a main body shell in a primary equipment operation switching device provided in an embodiment of the present invention;

[0032] Figure 2 The present invention provides a connection diagram of the internal logical structure of a main body shell in a primary equipment operation switching device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] like Figure 1 and Figure 2 As shown in the figure, a primary equipment operation switching device is proposed in an embodiment of the present invention, comprising a main body and a pluggable terminal block 2; wherein,

[0035] One side of the terminal block 2 is connected to multiple groups of normally open contacts (not shown) and multiple groups of normally closed contacts (not shown) on the switches, switches and ground switches connected to the primary equipment for operation switching; it should be noted that the way the terminals on the terminal block 2 are connected to the normally open contacts and the normally closed contacts can be exactly the same as the way the handles are connected on the traditional primary equipment operation switching device, only the terminals corresponding to the terminal block 2 are used to replace the connection points of the handles for unified deployment (such as Figure 1 As shown), and select control through simple electrical signals; of course, it can also be different from the traditional primary equipment operation switch device upper handle connection method, only all normally open contacts and normally closed contacts are connected once, and select control through complex electrical signals;

[0036] The main body includes a housing 11; a CPU board 111 and a switching potential transmission board 112 are arranged inside the housing 11; four main buttons 121 are arranged outside the housing 11; the CPU board 111 is connected to the switching potential transmission board 112 and the four main buttons 121; the switching potential transmission board 112 is provided with a card slot (not shown) for hot plugging the other side of the wiring terminal block 2;

[0037] Each main button 121 includes a pressed state and a reset state; each main button 121 is used to be in the pressed state when the user presses it an odd number of times to trigger a corresponding function among remote, local, deactivation and maintenance, and generate a corresponding analog signal; and, when the user presses it an even number of times, it is in the reset state to interrupt the corresponding function triggered; it should be noted that by generating different analog signals, the CPU board 111 can distinguish different main button triggers and the functions they trigger;

[0038] The CPU board 111 is used to define the contacts of the received analog signal according to the preset signal and contact correspondence mapping table when receiving the analog signal generated by a main button 121, so as to determine the on-off state of each group of normally open contacts and normally closed contacts on the switch, knife switch and ground switch connected to the primary equipment, and process the determined on-off state of the contact into a corresponding potential signal, which is further sent to the switching potential transmission board 112; wherein the signal and contact correspondence mapping table is used to indicate the relationship between any one of the functions of remote, local, deactivation and maintenance and a group or more of normally open contacts and normally closed contacts on the switch, knife switch and ground switch connected to the primary equipment, and reflects the on-off state of the corresponding normally open contacts and normally closed contacts;

[0039] The switching potential transmission board 112 is used to select the normally open contact or / and the normally closed contact connected to the corresponding terminal block 2 for switching operation when receiving the potential signal sent by the CPU board 111, so as to realize the transmission of a corresponding function of remote, local, deactivation and maintenance. It should be noted that the switching potential transmission board 112 can cooperate with the connecting piece between the terminals in the terminal block 2, and control the connection or disconnection of the connecting piece between the corresponding terminals through different potentials to realize the switching operation of the corresponding normally open contact or / and the normally closed contact. The specific process is realized by the common technical means in this field, and will not be elaborated here. In addition, in view of the fact that there are many ways to connect the normally open contact and the normally closed contact of the terminals on the terminal block 2, the selection mode of the corresponding potential signal will also be flexibly adjusted to realize the switching of different functions, which will not be repeated here.

[0040] In the embodiment of the present invention, considering the scenario where one or more main buttons 121 fail, the primary device operation switching device further includes: at least one standby button 122 connected to the CPU board; wherein,

[0041] Each standby button 122 is arranged outside the housing 11, including a pressed state and a reset state; each standby button is used to standby the trigger function of the corresponding main button 121, and is in the pressed state when the user presses it an odd number of times, enabling a corresponding function among remote, local, deactivated and repaired triggered by the corresponding standby main button to generate a corresponding analog signal; and, when the user presses it an even number of times, it is in the reset state to interrupt the function triggered by the corresponding standby main button. At this time, the standby of the trigger function of any standby button and the corresponding main button is achieved by the two generating the same analog signal, that is, the type of analog signal generated when the corresponding standby button 122 is pressed is predefined, so that the CPU board 111 can quickly identify the main button 121 that it replaces according to the type of analog signal generated by the standby button 122. It can be understood that the type of analog signal can be distinguished according to different level values.

[0042] In the embodiment of the present invention, the primary device operation switching device is further provided with a display screen 123 for human-computer interaction, a device button 124 for human-computer interaction, an amplifier 125, at least one data interface 126 and a cooling fan 126 outside the housing 11; wherein,

[0043] The display screen 123 is connected to the CPU board 111, and is used to receive user instructions to pre-build a mapping table of signal and contact correspondence; and to display the corresponding function triggered by the current main button and the on / off status of the normally open contacts and normally closed contacts on the switches, switches and ground switches connected to the primary equipment determined in the CPU board, etc.;

[0044] The device button 124 is connected to the CPU board 111 and includes up, down, left, right, confirm, switch and exit buttons; the device button 124 is used to switch the display mode and content of the display screen 123 according to the button;

[0045] The power amplifier 125 is connected to the CPU board 111 and is used to issue an alarm or play the corresponding function currently triggered by the main button 121 through sound;

[0046] The data interfaces 126 are all USB interfaces, and are connected to the CPU board 111 for data transmission;

[0047] The cooling fan 127 is connected to the CPU board 111 for heat dissipation.

[0048] The application scenario of a primary equipment operation switching device proposed in an embodiment of the present invention is further described as follows:

[0049] 1. Installation and debugging: After the primary equipment operation switching device of the present invention is positioned, the power cord is connected and a power-on test is performed to ensure that the device operates normally. At the same time, the device button 124 is used to test whether the menus in the display screen 123 are entered correctly, and after the power is turned on correctly, the test setting value needs to be entered. All switches, knife switches and earth switches connected to the primary equipment, as well as the normally open contacts and normally closed contacts of each switch, knife switch and earth switch are debugged through external devices to test whether the normally open and normally closed contacts are consistent with the device definition, and whether the device alarm and other functions can be accurately issued.

[0050] 2. Disconnect all secondary lines of the manual handle switching mode of the traditional primary equipment operation switching device, and reconnect the secondary lines on the terminal block 2 through the contact definition of the primary equipment operation switching device of the present invention, and no changes are required to the secondary lines in subsequent work.

[0051] 3. Fixed value execution: define the contacts according to the corresponding functions of the traditional primary equipment operation switching device, and construct a relationship between any one of the functions of indicating remote, local, out of service and maintenance and a certain group of normally open contacts and normally closed contacts on the switches, knife switches and ground switches connected to the primary equipment, and reflect the signal and contact correspondence mapping table of the on-off status of the corresponding normally open contacts and normally closed contacts, and check after the contacts are defined to ensure correctness.

[0052] 4. Functional acceptance: After the wiring and contact definition are prepared correctly, acceptance work is carried out according to the actual situation on site. The circuit acceptance is carried out by switching the main button 121 corresponding to the remote, local, deactivation and maintenance functions on the primary equipment operation switching device of the present invention. The specific display can be checked by the primary equipment operation switching device of the present invention and the operator workstation monitoring background, measurement and control device, control circuit and interlocking circuit to check the potential situation.

[0053] 5. The device is put into operation. After the function of the primary equipment operation switching device of the present invention is accepted and verified, it is put into actual use on site. According to the actual use on site, the areas that need improvement are summarized and the operation instructions are written for use by the operating personnel.

[0054] Implementing the embodiments of the present invention has the following beneficial effects:

[0055] 1. Compared with the manual handle switching mode of the traditional primary equipment operation switching device, the primary equipment operation switching device of the present invention uses buttons to switch modes to select remote, local, deactivated and maintenance gears, which solves the problem that the primary equipment operation switching device can no longer be used due to the iron rod being disengaged and stuck after long-term use in the traditional primary equipment operation switching device, thereby improving the service life and convenience;

[0056] 2. The primary equipment operation switching device of the present invention adopts a fixed mode in the wiring terminal block to connect with multiple groups of normally open contacts and multiple groups of normally closed contacts used for operation switching on the switches, knife switches and ground switches connected to the primary equipment. Once a fault occurs, it is only necessary to pull out the primary equipment operation switching device body of the present invention from the terminal block for replacement, and then reinstall the new primary equipment operation switching device body on the terminal block, thereby avoiding the traditional cumbersome process and danger, while also reducing the possibility of errors, and further improving the service life and convenience.

[0057] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A primary equipment operation switching device, characterized in that: It includes a main body and a pluggable terminal block; wherein, One side of the terminal block is connected to multiple groups of normally open contacts and multiple groups of normally closed contacts on switches, knife switches and ground switches connected to the primary equipment for operation switching; The body comprises a shell; a CPU board and a switching potential transmission board are arranged inside the shell; four main buttons are arranged outside the shell; the CPU board is connected to the switching potential transmission board and the four main buttons; a card slot for hot-plugging the other side of the terminal block is arranged on the switching potential transmission board; Each main button includes a pressed state and a reset state; each main button is used to be in the pressed state when the user presses it an odd number of times, so as to trigger a corresponding one of the remote, local, deactivation and maintenance functions and generate a corresponding analog signal; and, when the user presses it an even number of times, it is in the reset state to interrupt the corresponding function that has been triggered; The CPU board is used to define the contacts of the received analog signal according to the preset signal-contact correspondence mapping table when receiving the analog signal generated by a main button, so as to determine the on-off state of each group of normally open contacts and normally closed contacts on the switch, knife switch and ground switch connected to the primary equipment, and process the determined on-off state of the contact into a corresponding potential signal, which is further sent to the switching potential transmission board; wherein the signal-contact correspondence mapping table is used to indicate the relationship between any one of the functions of remote, local, deactivation and maintenance and a group or more of normally open contacts and normally closed contacts on the switch, knife switch and ground switch connected to the primary equipment, and reflects the on-off state of the corresponding normally open contacts and normally closed contacts; The switching potential transmission board is used to select the normally open contact or / and normally closed contact corresponding to the terminal block for switching operation when receiving the potential signal sent by the CPU board, so as to realize the transmission of a corresponding function among remote, local, deactivation and maintenance.

2. The primary equipment operation switching device according to claim 1, characterized in that: Also includes: At least one standby button connected to the CPU board; wherein, Each standby button is arranged outside the shell, including a pressed state and a reset state; each standby button is used to standby the trigger function of a corresponding main button, and is in the pressed state when the user presses it an odd number of times, enabling a corresponding one of the remote, local, deactivated and maintenance functions triggered by the corresponding standby main button to generate a corresponding analog signal; and, when the user presses it an even number of times, it is in the reset state to interrupt the function triggered by the corresponding standby main button.

3. The primary equipment operation switching device according to claim 2, characterized in that: The backup of the triggering function of any standby button and the corresponding main button is achieved by both generating the same analog signal.

4. The primary equipment operation switching device according to claim 3, characterized in that: Also includes: A display screen for human-computer interaction; wherein, The display screen is arranged outside the shell and connected to the CPU board, and is used to receive user instructions to pre-build the signal and contact correspondence mapping table; and display the corresponding function triggered by the current main button and the on-off status of the normally open contacts and normally closed contacts on the switches, knife switches and ground switches connected to the primary equipment determined in the CPU board.

5. The primary equipment operation switching device according to claim 4, characterized in that: Also includes: Device button for human-computer interaction; wherein, The device button is arranged outside the shell and connected to the CPU board, and includes up, down, left, right, confirm, switch and exit buttons; the device button is used to switch the display mode and content of the display screen according to the button.

6. The primary equipment operation switching device according to claim 5, characterized in that: Also includes: Amplifier; among them, The power amplifier is arranged outside the housing and connected to the CPU board, and is used to issue an alarm through sound or play the corresponding function triggered by the current main button.

7. The primary equipment operation switching device according to claim 6, characterized in that: Also includes: At least one data interface; wherein, The data interface is a USB interface, which is arranged outside the housing and connected to the CPU board for data transmission.

8. The primary equipment operation switching device according to claim 7, characterized in that: Also includes: A cooling fan; wherein: The heat dissipation fan is arranged outside the housing and connected to the CPU board for heat dissipation.

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