Protection constant value printing switching assembly

Abstract

The utility model provides a protection constant value printing switching assembly, and relates to the field of relay protection, and the protection constant value printing switching assembly comprises a printing line, a switching piece and a switching line. The printing line is connected to a first printing interface of a rear door of the relay protection device; the adapter is located at a front door of the relay protection device and comprises a dial switch, a second printing interface and a third printing interface; the patch cord comprises a fourth printing interface and a main control element, and the fourth printing interface is connected with the third printing interface; wherein the dial switch controls the output high and low levels through the on-off of the pins, and the on-off state combination of the dial switch corresponds to the ID number of the relay protection device. And during fixed value printing, an operator does not need to run back and forth. The third printing interface is connected with the fourth printing interface of the patch cord, the dial switch can control output high and low levels through on-off of the pins, the on-off state combination of the dial switch corresponds to the ID number of the relay protection device, and the device can automatically identify corresponding protection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relay protection, in particular to a protection setting value printing switching component. BACKGROUND

[0002] The relay protection of the power system is an important part of the power system, which plays a very important role in ensuring the safe, stable and economic operation of the power system. Effective and timely relay protection management work is a powerful guarantee for the safe and stable operation of the power grid. By setting the relay protection device, when the power grid fails, it can automatically isolate the fault and ensure the safety of the rest of the power grid.

[0003] In the related art, with the increasing application of computer technology in the production and dispatching of the power system, the relay protection setting value management mode has begun to transition from the original manual input and paper-based office form to the paperless office form based on computer and network technology.

[0004] However, the current setting value printing needs to connect the printing line to the back door of the device, then issue a printing command at the front door, and needs to run back and forth, and the device name needs to be manually selected and determined, and the corresponding protection is manually selected. The entire relay protection setting value management mode is cumbersome and inefficient, and needs to be improved. CONTENT OF THE INVENTION

[0005] In view of the deficiencies of the prior art, the present application provides a protection setting value printing switching component, which solves the problem of cumbersome and inefficient relay protection setting value management mode of the current relay protection device.

[0006] To achieve the above purpose, the present application is implemented by the following technical solutions:

[0007] The protection setting value printing switching component provided by the embodiment of the present application comprises a printing line, a switching piece and a switching line; the printing line is connected to a first printing interface of the back door of the relay protection device; the switching piece is located at the front door of the relay protection device, and comprises a DIP switch, a second printing interface and a third printing interface; the two ends of the printing line are connected to the first printing interface and the second printing interface respectively, and the second printing interface and the third printing interface are electrically connected to each other and located at the inner side and the outer side of the front door of the relay protection device respectively; the switching line comprises a fourth printing interface and a master control element; the fourth printing interface is connected to the third printing interface, and the master control element has a standard USB interface to connect a printing terminal; wherein the DIP switch controls the high and low levels of the output through the on-off of the pin, and the on-off state combination of the DIP switch corresponds to the ID number of the relay protection device.

[0008] In some embodiments, the first printing interface, the second printing interface, the third printing interface and the fourth printing interface are all DB25 interfaces.

[0009] In some embodiments, the second printing interface includes a first pin group, the third printing interface includes a second pin group, and the pins in the first pin group and the pins in the second pin group are directly connected based on the index number.

[0010] In some embodiments, the first pin group includes a pin 3, a pin 7, and a pin 20 of the second printing interface; the second printing interface further includes a third pin group, and a plurality of pins in the third pin group are left hanging.

[0011] In some embodiments, the second pin group includes a pin 3, a pin 7, and a pin 20 of the third printing interface; the third printing interface further includes a fourth pin group, and a plurality of pins in the fourth pin group are connected to a first side of a DIP switch, and a second side of the DIP switch is connected to a pin 20 of the third printing interface.

[0012] In some embodiments, the pin 20 of the third printing interface is a high-level pin; the fourth pin group is further connected to a pull-down resistor, and the pull-down resistor is connected to a pin 7 of the third printing interface, and the pin 7 of the third printing interface corresponds to a ground end GND of an electric wire.

[0013] In some embodiments, the adapter wire further includes a level conversion element and a high-low level detection element, the level conversion element is connected to the master control element and a first part of pins of the fourth printing interface; and the high-low level detection element is connected to the master control element and a second part of pins of the fourth printing interface.

[0014] In some embodiments, the first part of pins is a pin 3 of the fourth printing interface, the pin 3 of the fourth printing interface is electrically connected to the master control element through the level conversion element; and the level conversion element converts the level output by the fourth printing interface to be consistent with the communication level of the master control element, so as to realize data transmission.

[0015] In some embodiments, the second part of pins is electrically connected to the high-low level detection element, so as to identify the ID number of the relay protection device by judging the high-low level of each pin in the second part of pins.

[0016] In some embodiments, the fourth printing interface further includes a third part of pins, the third part of pins is a pin 7 and a pin 20 of the fourth printing interface, and the third part of pins is directly connected to the master control element.

[0017] In some embodiments, the protection setting value printing adapter assembly further includes an ID card sticker arranged on a front door of the relay protection device, and the adapter wire further includes a radio frequency identification (RFID) element, the RFID element is electrically connected to the master control element, so as to perform identification verification with the ID card sticker when the adapter wire is close to the front door of the relay protection device.

[0018] The application provides a protection setting value printing switching assembly. Compared with the prior art, the following beneficial effects are achieved.

[0019] The application sets a printing line at the back door position of a relay protection device, and installs a switching piece at the front door of the relay protection device. The switching piece comprises a DIP switch, a second printing interface arranged on the inner side of the front door, and a third printing interface arranged on the outer side of the front door. The second printing interface and the third printing interface are connected to each other. The printing line directly extends from the back door to the inner side of the front door and connects the first printing interface and the second printing interface. Data can be transmitted to the third printing interface arranged on the outer side of the front door. When setting value printing is performed, an operator does not need to connect the printing line at the back door of the device and return to the front door to issue a printing command, and does not need to run back and forth. The third printing interface is connected to a fourth printing interface of a switching line. The DIP switch can control the high and low levels of the output through the on-off of the pin. The on-off state combination of the DIP switch corresponds to the ID number of the relay protection device. The device can automatically identify the corresponding protection. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained without creative labor.

[0021] Figure 1 It is an exemplary structural arrangement drawing of the protection setting value printing switching assembly provided by the embodiment of the present application.

[0022] The drawings are as follows: printing line 1; first printing interface 11; switching piece 2; DIP switch 21; second printing interface 22; third printing interface 23; switching line 3; fourth printing interface 31; main control element 32; standard USB interface 321; level conversion element 33; high and low level detection element 34; radio frequency identification (RFID) element 35; pull-down resistor 4; ID card 5. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0024] It is to be understood that the terminology used herein such as first and second, and the like, is only used to differentiate one entity or action from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0025] The embodiment of the present application provides a protection setting value printing switching component, and solves the problems of complicated and inefficient relay protection setting value management modes of current relay protection devices.

[0026] The technical solutions in the embodiment of the present application are used to solve the above technical problems, and the general idea is as follows:

[0027] In a power system, short circuit will occur due to various reasons, and very large fault short circuit current will occur when the fault occurs. If the part of electrical equipment that has the fault is not quickly cut off from the normal operation of the power grid system, the fault current will last for a long time, or reach the setting value of the upper level protection device, causing the upper level power grid switch to trip.

[0028] For relay protection, relay protection devices are usually installed between various levels of power transmission, power transformation, power distribution and power utilization equipment. One is to quickly cut off the fault current, and the other is to reduce the fault range. The protection device needs two basic parameters: one is that when the fault current reaches a certain value, the protection must act and automatically trip the switch, and the other is that when the fault current reaches a certain value, the protection device must act within a certain time and issue a trip command. The two sets of parameters are protection setting values, which are usually calculated by the dispatching department.

[0029] Power system relay protection is an important part of the power system, and plays a very important role in ensuring the safe, stable and economic operation of the power system. Effective and timely relay protection management work is a powerful guarantee for the safe and stable operation of the power grid. By setting the relay protection device, when the power grid fails, the fault can be automatically isolated, thereby ensuring the safety of the rest of the power grid.

[0030] With the increasingly widespread application of computer technology in power system production dispatching, the management of relay protection settings is transitioning from manual data entry and paper-based office methods to a paperless system based on computer and network technologies. However, current setting printing requires connecting the printing line at the back of the equipment and then issuing the printing command at the front, necessitating back-and-forth movement. The equipment name and corresponding protection must also be manually selected. This entire relay protection setting management method is cumbersome and inefficient, and urgently needs improvement.

[0031] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0032] The following is a description of a protection setting printing adapter component provided in the embodiments of this application.

[0033] This application provides a protection setting printing adapter component, such as... Figure 1 As shown, the protection setting printing adapter assembly includes: a printing line 1, an adapter 2, and an adapter line 3; the printing line 1 is connected to the first printing interface 11 on the rear door of the relay protection device; the adapter 2 is located on the front door of the relay protection device, and the adapter 2 includes a DIP switch 21, a second printing interface 22, and a third printing interface 23. The two ends of the printing line 1 are respectively connected to the first printing interface 11 and the second printing interface 22. The second printing interface 22 and the third printing interface 23 are electrically connected to each other and are located on the inner and outer sides of the front door of the relay protection device, respectively.

[0034] In addition, the adapter cable 3 includes a fourth printing interface 31 and a main control element 32; the fourth printing interface 31 is connected to the third printing interface 23, and the main control element 32 has a standard USB interface 321 to connect to the printing terminal; wherein, the DIP switch 21 controls the high and low level of the output through the on and off state of the pins, and the on and off state combination of the DIP switch 21 corresponds to the ID number of the relay protection device.

[0035] In the embodiments of this application, it is understood that a printing line 1 is installed at the rear door of the relay protection device, and an adapter 2 is installed at the front door of the relay protection device. The adapter 2 includes a DIP switch 21, a second printing interface 22 located on the inside of the front door, and a third printing interface 23 located on the outside of the front door. The second printing interface 22 and the third printing interface 23 are connected to each other. The printing line 1 extends directly from the rear door to the inside of the front door and connects to the first printing interface 11 and the second printing interface 22. Data can be transmitted to the third printing interface 23 located on the outside of the front door. When performing fixed value printing, the operator does not need to go to the rear door of the equipment to connect the printing line 1 and return to the front door to issue the printing command, and there is no need to run back and forth.

[0036] Further, when the fixed value printing is performed, the fourth printing interface 31 of the adapter line 3 is connected to the third printing interface 23 outside the front door of the relay protection device; the data transmission is performed through the connection between the third printing interface 23 and the fourth printing interface 31 of the adapter line 3; the on-off of the pin of the DIP switch 21 can control the high and low level of the output, and the on-off state combination of the DIP switch 21 corresponds to the ID number of the relay protection device, and the device can automatically identify the corresponding protection. When the DIP switch 21 is in the closed state, the corresponding pin is high; when the DIP switch 21 is in the open state, the corresponding pin is low.

[0037] In some embodiments, please refer to Figure 1 , the first printing interface 11, the second printing interface 22, the third printing interface 23 and the fourth printing interface 31 are all DB25 interfaces. It can be understood that the DB25 interface is a common type of D-sub interface, the DB25 interface has 25 pins, which are divided into upper and lower rows, 13 pins in the upper row and 12 pins in the lower row; the DB25 interface is commonly used for data communication and control.

[0038] In some embodiments, please refer to Figure 1 , the second printing interface 22 includes a first pin group, the third printing interface 23 includes a second pin group, and the pins in the first pin group and the pins in the second pin group are directly connected based on the index number.

[0039] In the embodiments of the present application, it can be understood that the second printing interface 22 is located inside the front door of the relay protection device, the third printing interface 23 is located outside the front door of the relay protection device, and the first pin group and the second pin group are directly connected in sequence; in the process of protection fixed value printing, the front door of the relay protection device does not need to be opened.

[0040] In some embodiments, please refer to Figure 1 , the first pin group includes the 3rd pin, the 7th pin and the 20th pin of the second printing interface 22; the second printing interface 22 further includes a third pin group, and the pins in the third pin group are suspended. The second pin group includes the 3rd pin, the 7th pin and the 20th pin of the third printing interface 23; the third printing interface 23 further includes a fourth pin group, and the pins in the fourth pin group are connected to the first side of the DIP switch 21, and the second side of the DIP switch 21 is connected to the 20th pin of the third printing interface 23.

[0041] In the embodiments of the present application, it can be understood that the No. 3 pin, No. 7 pin and No. 20 pin of the second printing interface 22 are directly connected to the corresponding No. 3 pin, No. 7 pin and No. 20 pin of the third printing interface 23. Further, the third printing interface 23 includes a second pin group and a fourth pin group, that is, part of the pins of the third printing interface 23 are connected to the second printing interface 22, and another part of the pins of the third printing interface 23 are connected to the code switch 21.

[0042] In one example, referring to Figure 1 , the No. 20 pin of the third printing interface 23 is a high-level pin; the fourth pin group is further connected to a pull-down resistor 4, and the pull-down resistor 4 is connected to the No. 7 pin of the third printing interface 23, and the No. 7 pin of the third printing interface 23 corresponds to the ground end GND of the wire. It can be understood that the pull-down resistor is an electronic element in which multiple pull-down resistors are integrated together, and which plays a role of simultaneously pulling down multiple signal lines to a low level in a circuit.

[0043] In some embodiments, referring to Figure 1 , the adapter wire 3 further includes a level conversion element 33 and a high-low level detection element 34, the level conversion element 33 is connected to the master control element 32 and the first part of the pins of the fourth printing interface 31; and the high-low level detection element 34 is connected to the master control element 32 and the second part of the pins of the fourth printing interface 31.

[0044] In one example, referring to Figure 1 , the first part of the pins is the No. 3 pin of the fourth printing interface 31, and the No. 3 pin of the fourth printing interface 31 is electrically connected to the master control element 32 through the level conversion element 33; the level conversion element 33 converts the level output by the fourth printing interface 31 to be consistent with the communication level of the master control element 32, so as to realize data transmission.

[0045] In another example, referring to Figure 1 , the second part of the pins is electrically connected to the high-low level detection element 34, so as to identify the ID number of the relay protection device by judging the high-low level of each pin in the second part of the pins. The fourth printing interface 31 further includes a third part of the pins, which is the No. 7 pin and No. 20 pin of the fourth printing interface 31 and is directly connected to the master control element 32.

[0046] It can be understood that the pins of the fourth printing interface 31 are divided into three types, that is, the first part of the pins, the second part of the pins and the third part of the pins constitute all the pins of the fourth printing interface 31; wherein the first part of the pins is used for data transmission, and the second part of the pins is used for identifying the ID number of the relay protection device through high-low level.

[0047] In some embodiments, referring to Figure 1The protection fixed value printing adapter further comprises an ID card sticker 5 arranged at the front door of the relay protection device, and the adapter wire 3 further comprises a radio frequency identification (RFID) element 35, which is electrically connected to the master control element 32 to perform identification verification with the ID card sticker 5 when the adapter wire 3 approaches the front door of the relay protection device.

[0048] Compared with the prior art, the application has the following beneficial effects:

[0049] 1. The application provides a printing line arranged at the rear door of the relay protection device, a dial switch arranged at the front door of the relay protection device, a second printing interface arranged at the inner side of the front door, and a third printing interface arranged at the outer side of the front door. The printing line directly extends from the rear door to the inner side of the front door and is connected to the first printing interface and the second printing interface. Data can be transmitted to the third printing interface arranged at the outer side of the front door. When performing fixed value printing, the operator does not need to first connect the printing line at the rear door of the device and return to the front door to issue a printing command, and does not need to run back and forth.

[0050] 2. The third printing interface is connected to the fourth printing interface of the adapter wire. The dial switch can control the high and low levels of the output through the on-off of the pins. The on-off state combination of the dial switch corresponds to the ID number of the relay protection device. The high and low level detection element can identify the ID number of the relay protection device by judging the high and low levels of the connected pins. The device can automatically identify the corresponding protection.

[0051] The above embodiments are only used to illustrate the technical solutions of the application, but not to limit the same. Although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents. Such modifications or replacements do not change the essence of the corresponding technical solutions, and do not deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A protection setpoint printing adapter assembly, characterized by, The utility model relates to a relay protection device printing terminal, which comprises: a printing line (1) connected to a first printing interface (11) of a back door of a relay protection device; an adapter (2) located at a front door of the relay protection device, the adapter (2) comprising a DIP switch (21), a second printing interface (22) and a third printing interface (23), two ends of the printing line (1) being connected to the first printing interface (11) and the second printing interface (22) respectively, the second printing interface (22) and the third printing interface (23) being electrically connected to each other and located at the inner side and the outer side of the front door of the relay protection device respectively; and an adapter line (3) comprising a fourth printing interface (31) and a master control element (32), the fourth printing interface (31) being connected to the third printing interface (23), and the master control element (32) having a standard USB interface (321) for connecting a printing terminal. The DIP switch (21) controls the high and low levels of the output through the on-off of the pin, and the on-off state combination of the DIP switch (21) corresponds to the ID number of the relay protection device.

2. The protection setting print relay adapter assembly of claim 1, wherein, The first printing interface (11), the second printing interface (22), the third printing interface (23) and the fourth printing interface (31) are all DB25 interfaces.

3. The protection setting print relay adapter assembly of claim 2, wherein, The second printing interface (22) comprises a first pin group, the third printing interface (23) comprises a second pin group, and the pins in the first pin group and the pins in the second pin group are directly connected based on the index number.

4. The protection setting print relay adapter assembly of claim 3, wherein, The first pin group comprises pin No. 3, pin No. 7 and pin No. 20 of the second printing interface (22), the second printing interface (22) further comprises a third pin group, and the pins in the third pin group are suspended.

5. The protection setting print relay adapter assembly of claim 3, wherein, The second pin group comprises pin No. 3, pin No. 7 and pin No. 20 of the third printing interface (23), the third printing interface (23) further comprises a fourth pin group, the pins in the fourth pin group are connected to the first side of the DIP switch (21), and the second side of the DIP switch (21) is connected to pin No. 20 of the third printing interface (23).

6. The protection setting print relay adapter assembly of claim 5, wherein, Pin No. 20 of the third printing interface (23) is a high-level pin, the fourth pin group is further connected with a pull-down resistor (4), the pull-down resistor (4) is connected to pin No. 7 of the third printing interface (23), and pin No. 7 of the third printing interface (23) corresponds to a wire grounding end GND.

7. The protection setting print relay adapter assembly of claim 2, wherein, The adapter line (3) further comprises a level conversion element (33) and a high-low level detection element (34), the level conversion element (33) being connected to the master control element (32) and a first part of pins of the fourth printing interface (31), and the high-low level detection element (34) being connected to the master control element (32) and a second part of pins of the fourth printing interface (31).

8. The protection setting print relay adapter assembly of claim 7, wherein, The first part of the pin is No. 3 pin of the fourth printing interface (31), and the No. 3 pin of the fourth printing interface (31) is electrically connected with the master control element (32) through the level conversion element (33); the level conversion element (33) converts the level output by the fourth printing interface (31) to be consistent with the communication level of the master control element (32) to realize data transmission.

9. The protection setting print relay adapter assembly of claim 8, wherein, The second part of the pin is electrically connected with the high-low level detection element (34) to identify the ID number of the relay protection device by judging the high-low level of each pin in the second part of the pin. The fourth printing interface (31) further comprises a third part of the pin, which is No. 7 pin and No. 20 pin of the fourth printing interface (31) and is directly connected with the master control element (32).

10. The protection setting print relay adapter assembly of claim 1, wherein, Further comprising an ID card sticker (5) arranged on the front door of the relay protection device, and the adapter wire (3) further comprises a radio frequency identification (RFID) element (35) electrically connected with the master control element (32) to perform identification verification with the ID card sticker (5) when the adapter wire (3) is close to the front door of the relay protection device.

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