A training device for the secondary circuit of relay protection

Abstract

The present invention discloses a training device for a secondary circuit of relay protection, which includes a relay and multiple displays; the relay includes a coil and at least one first switch group, and the first switch group includes a first common contact, a first normally open contact, and a first normally closed contact; the secondary circuit of relay protection includes multiple sub-protection circuits, and the coil, the first common contact, the first normally open contact, and the second normally open contact are all arranged in each sub-protection circuit; each display is used to display the status information of the coil, the first common contact, the first normally open contact, and the first normally closed contact. By displaying the status information of each component in the relay through the display, that is, directly displaying the energized state of the coil, the on-off state of the first normally open contact, and the on-off state of the first normally closed contact, when conducting education and training for learners, it can enable learners to intuitively understand and learn the working principle of the relay and its role in the secondary circuit of relay protection.

Description

Technical Field

[0001] The invention relates to the technical field of power systems, and in particular to a training device for a relay protection secondary circuit. Background Art

[0002] The relay protection secondary circuit is a low-voltage electrical device that monitors, controls, measures, adjusts and protects the operating conditions of the power system and primary equipment. It usually includes multiple relays to achieve control of the main circuit.

[0003] When the relay coil is energized, the opening and closing of its normally closed and normally open contacts will change accordingly, and the circuit breaker will open, close, and prevent tripping. There are many relay coils in the circuit, and one coil may correspond to two, three, or even more auxiliary contacts. In actual relays, the coils and auxiliary contacts are staggered, and it is difficult to show how they are connected in different circuits. The opening and closing of the auxiliary contacts cannot be seen by the naked eye, making it difficult for beginners to understand and remember the status of the normally open and normally closed contacts. If you only look at the schematic diagram, the learning process is very difficult. Summary of the invention

[0004] The invention provides a training device for a relay protection secondary circuit, which helps learners to intuitively understand and learn the working principle of a relay and the role of a relay in a relay protection secondary circuit.

[0005] According to one aspect of the present invention, there is provided a training device for a relay protection secondary circuit, comprising: a relay and a plurality of displays;

[0006] The relay comprises a coil and at least one first switch group, wherein the first switch group comprises a first common contact, a first normally open contact and a first normally closed contact;

[0007] The relay protection secondary circuit includes a plurality of sub-protection circuits, and the coil, the first common contact, the first normally open contact and the second normally open contact are all arranged in each of the sub-protection circuits;

[0008] Each of the displays is used to display status information of the coil, the first common contact, the first normally open contact and the first normally closed contact.

[0009] Optionally, the training device for the relay protection secondary circuit further includes: a controller;

[0010] The relay further comprises a second switch group, the second switch group comprising a second common contact, a second normally open contact and a second normally closed contact;

[0011] The second common contact is electrically connected to the positive power supply, the second normally open contact is electrically connected to the controller, and the second normally closed contact is floating or grounded; when the second normally open contact is closed, the positive voltage signal provided by the positive power supply is transmitted to the controller through the closed second normally open contact;

[0012] The controller is also electrically connected to each display, and the controller is configured to control each display to display the status information of the coil, the first normally open contact, and the first normally closed contact when receiving the positive voltage signal.

[0013] Optionally, the multiple displays include a first display, a second display, and a third display;

[0014] The controller is configured to control the first display to display the status information that the coil is in the energized state, control the second display to display the status information that the first normally closed contact is in the open state, and control the third display to display the status information that the first normally open contact is in the closed state when receiving the positive voltage signal.

[0015] Optionally, the controller is further configured to control the first display to display the status information that the coil is in the de-energized state, control the second display to display the status information that the first normally closed contact is in the closed state, and control the third display to display the status information that the first normally open contact is in the open state when not receiving the positive voltage signal.

[0016] Optionally, the multiple displays include a fourth display and a fifth display;

[0017] The controller is further configured to control the fourth display to display the status information that the second normally closed contact is in the open state, and control the fifth display to display the status information that the second normally open contact is in the closed state when receiving the positive voltage signal.

[0018] Optionally, the controller is further configured to control the fourth display to display the status information that the second normally closed contact is in the closed state, and control the fifth display to display the status information that the first normally open contact is in the conducting state when not receiving the positive voltage signal.

[0019] Optionally, the training device for the secondary circuit of the relay protection further includes: display elements provided in one-to-one correspondence with the multiple sub-protection circuits;

[0020] Each of the multiple sub-protection circuits is integrated in the corresponding display element.

[0021] Optionally, the display is disposed on the surface of the display element.

[0022] Optionally, the first display is disposed on the surface of the display element electrically connected to the coil;

[0023] The second display is disposed on the surface of the display element electrically connected to the first normally closed contact;

[0024] The third display is disposed on the surface of the display element electrically connected to the first normally open contact.

[0025] Optionally, each of the displays is specifically configured to display the status information of the coil, the first common contact, the first normally open contact, and the first normally closed contact through video animations.

[0026] For the training device of the secondary circuit of the relay protection provided by the embodiment of the present invention, when a relay is provided in the secondary circuit of the relay protection, the status information of each element in the relay is displayed through a display, that is, the energized state of the coil, the on / off state of the first normally open contact, and the on / off state of the first normally closed contact are visually displayed. When educating and training learners, it can enable learners to intuitively understand and learn the working principle of the relay and its role in the secondary circuit of the relay protection.

[0027] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 is a circuit diagram of a part of the secondary circuit of the relay protection in the prior art;

[0030] Figure 2 is a schematic structural diagram of a training device for a secondary circuit of a relay protection provided by an embodiment of the present invention;

[0031] Figure 3 is a schematic structural diagram of another training device for a secondary circuit of a relay protection provided by an embodiment of the present invention;

[0032] Figure 4 is a schematic structural diagram of yet another training device for a secondary circuit of a relay protection provided by an embodiment of the present invention;

[0033] Figure 5It is a schematic structural diagram of a training device for a secondary circuit of a relay protection provided by an embodiment of the present invention. Detailed implementation manners

[0034] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily need to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these process, method, product or device.

[0036] Figure 1 It is a circuit diagram of a part of the secondary circuit of a relay protection in the prior art. In the figure, +KM is the positive control bus in the small bus, -KM is the negative control bus in the small bus, TWJ is the trip position monitoring relay, R is the resistor, KK is the control handle, HBJ is the closing holding relay, QF is the breaker position auxiliary contact, HJ is the closing contact, HQ is the closing coil, LD is the green light, HWJ is the closing position monitoring relay, BTJ is the protection trip contact, HD is the red light, TQ is the trip coil, TBJ is the anti-trip relay in the protection device, and TBJV is the voltage type anti-trip locking relay. As Figure 1 shown, the coils and contacts of the same relay are distributed in different control circuits. For example, the coil and normally open contact of the voltage type anti-trip locking relay TBJV are located in the anti-trip circuit in the protection device, while its normally closed contact is located in the manual closing circuit, making the distribution of the coil and each contact belonging to the same relay relatively scattered. And because the wiring of the secondary circuit of the relay protection is usually relatively complex and has many links, it is often difficult for beginners to understand and remember the states of the normally open and normally closed contacts during teaching and training for beginners. If only looking at the schematic diagram, the learning process is very difficult.

[0037] To solve the above technical problems, an embodiment of the present invention provides a training device for a secondary circuit of a relay protection. Figure 2 As shown in the structural schematic diagram of a training device for a secondary circuit of a relay protection provided by an embodiment of the present invention, Figure 2 as shown, the training device 00 for the secondary circuit of the relay protection includes a relay 10 and a plurality of displays 20; the relay 10 includes a coil L0 and at least one first switch group 11, and the first switch group 11 includes a first common contact COM1, a first normally open contact NO1, and a first normally closed contact NC1; the secondary circuit of the relay protection includes a plurality of sub - protection circuits 01, and the coil L0, the first common contact COM1, the first normally open contact NO1, and the second normally closed contact NC1 are all arranged in each sub - protection circuit 01; each display 20 is used to display the status information of the coil L0, the first common contact COM1, the first normally open contact NO1, and the first normally closed contact NC1.

[0038] Specifically, the sub - protection circuit 01 may include a first sub - protection circuit 011 electrically connected to the coil L0, a second sub - protection circuit 012 electrically connected to the first normally closed contact NC1, and a third sub - protection circuit 013 electrically connected to the first normally open contact NO1. Each sub - protection circuit 01 may be each protection circuit as shown in Figure 1 For example, taking the voltage - type anti - bounce locking relay TBJV as an example, the first sub - protection circuit 011 and the third sub - protection circuit 013 are the anti - bounce circuits in the protection device, and the second sub - protection circuit 012 is the manual closing circuit. The relay 10 may include at least one first switch group 11 composed of the first common contact COM1, the first normally open contact NO1, and the first normally closed contact NC1. When the coil L0 of the relay 10 is in a power - off state, the first normally closed contact NC1 in the first switch group 11 is in a closed state, while the first normally open contact NO1 is in an open state, that is, as shown in Figure 1 the switch between the first common contact COM1 and the first normally closed contact NC1 is conducting, and the switch between the first common contact COM1 and the first normally open contact NO1 is disconnected. When the coil L0 of the relay 10 is in a power - on state, the first normally closed contact NC1 in the first switch group 11 is in an open state, while the first normally open contact NO1 is in a closed state, that is, as shown in Figure 1 the switch between the first common contact COM1 and the first normally open contact NO1 is conducting, and the switch between the first common contact COM1 and the first normally closed contact NC1 is disconnected.

[0039] Displays 20 can be provided corresponding to coil L0, first common contact COM1, and first normally closed contact NC1 respectively. For example, a first display 21 is provided to display the status information of coil L0, that is, the status information indicating whether coil L0 is energized. A second display 22 is provided to display the status information of first normally closed contact NC1, that is, the status information indicating whether first normally closed contact NC1 is closed or open. A third display 23 is provided to display the status information of first normally open contact NO1, that is, the status information indicating whether first normally open contact NO1 is closed or open. In this way, when conducting training and teaching on the secondary circuit of relay protection, the working principle of relay 10 and the on-off status of relay 10 in the secondary circuit of relay protection can be intuitively shown through the respective displays, facilitating learners to better understand the role of the relay in the secondary circuit of relay protection.

[0040] Exemplarily, Figure 2 Only the case where relay 10 only includes one first switch group 11 is exemplarily shown. In other embodiments of the present invention, relay 10 may further include multiple first switch groups 11 to implement the functions of the secondary circuit of relay protection. The embodiments of the present invention do not make specific limitations in this regard. When relay 10 includes multiple first switch groups 11, displays can be provided corresponding to each first normally open contact NO1 and each first normally closed contact NC1 one by one to independently display each contact, so as to avoid confusing the learners.

[0041] The training device for the secondary circuit of relay protection provided by the embodiments of the present invention, when a relay is provided in the secondary circuit of relay protection, displays the status information of each component in the relay through a display, that is, intuitively displays the energized status of the coil, the on-off status of the first normally open contact, and the on-off status of the first normally closed contact. When conducting education and training for learners, it can enable the learners to intuitively understand and learn the working principle of the relay and its role in the secondary circuit of relay protection.

[0042] Optionally, each display 20 is specifically configured to display the status information of coil L0, first common contact COM1, first normally open contact NO1, and first normally closed contact NC1 through video animations.

[0043] Specifically, the display 20 can display the status information of each component in the relay 10 through video animations. For example, the first display 21 can display an image of the coil L0, and the image is displayed in a first color when the coil L0 is powered on and in a second color when the coil L0 is not powered on; the second display 22 can display the image information of the first normally closed contact NC1, and the closing and opening of the first normally closed contact NC1 are displayed through video animations; the third display 23 can display the image information of the first normally open contact NO1, and the closing and opening of the first normally open contact NO1 are displayed through video animations. In this way, learners can better understand and learn the working principle of the relay and its role in the secondary circuit of relay protection through an intuitive display method.

[0044] Optionally, Figure 3 is a schematic structural diagram of another training device for the secondary circuit of relay protection provided by an embodiment of the present invention. As Figure 3 shown, the training device 00 for the secondary circuit of relay protection further includes a controller 30; the relay 10 further includes a second switch group 12, and the second switch group 12 includes a second common contact COM2, a second normally open contact NO2, and a second normally closed contact NC2; the second common contact COM2 is electrically connected to the positive power supply VCC, the second normally open contact NO2 is electrically connected to the controller 30, and the second normally closed contact NC2 is suspended or grounded; when the second normally open contact NO2 is closed, the positive voltage signal provided by the positive power supply VCC is transmitted to the controller 30 through the closed second normally open contact NO2; the controller 30 is also electrically connected to each display 20, and the controller 30 is configured to control each display 20 to display the status information of the coil L0, the first normally open contact NO1, and the first normally closed contact NC1 when receiving the positive voltage signal.

[0045] Specifically, when the coil L0 of the relay 10 is in a power-off state, the second normally closed contact NC2 in the second switch group 12 is in a closed state, while the second normally open contact NO2 is in an open state, that is, as Figure 2 the switch between the second common contact COM2 and the second normally closed contact NC2 is turned on, and the switch between the second common contact COM2 and the second normally open contact NO2 is turned off. When the coil L0 of the relay 10 is in a powered-on state, the second normally closed contact NC2 in the second switch group 22 is in an open state, while the second normally open contact NO2 is in a closed state, that is, as Figure 2The switch between the second common contact COM2 and the second normally open contact NO2 is turned on, and the switch between the second common contact COM2 and the second normally closed contact NC2 is turned off. In this way, when the switch between the second common contact COM2 and the second normally open contact NO2 is turned on, the positive voltage signal provided by the positive power supply VCC is transmitted to the controller 30 through the closed second normally open contact NO2. After receiving the positive voltage signal, the controller 30 can determine that the coil L0 is powered on, and thus can further determine that the first normally closed contact NC1 in the first switch group 11 is turned off and the first normally open contact NO1 is turned on, so as to control each display 20 to display the status information of the coil L0, the status information of the first normally closed contact NC1, and the status information of the first normally open contact NO1.

[0046] Optionally, referring to Figure 3 , the multiple displays 20 include a first display 21, a second display 22, and a third display 23; the controller 20 is configured to control the first display 21 to display the status information that the coil L0 is in the powered-on state, control the second display 22 to display the status information that the first normally closed contact NC1 is in the off state, and control the third display 23 to display the status information that the first normally open contact NO1 is in the on state when receiving the positive voltage signal.

[0047] Specifically, in combination with the above embodiments, when the controller 20 receives the positive voltage signal, it can determine that the coil L0 is powered on, and further determine that the first normally closed contact NC1 is turned off and the first normally open contact NO1 is turned on. At this time, it can control the first display 21 to display the status information that the coil L0 is in the powered-on state, control the second display 22 to display the status information that the first normally closed contact NC1 is switched from the closed state to the off state, that is, in the off state, and control the third display 23 to display the status information that the first normally open contact NO1 is switched from the off state to the on state, that is, in the on state.

[0048] Optionally, the controller 30 is further configured to control the first display 21 to display the status information that the coil L0 is in the powered-off state, control the second display 22 to display the status information that the first normally closed contact NC1 is in the closed state, and control the third display 23 to display the status information that the first normally open contact NO2 is in the off state when not receiving the positive voltage signal.

[0049] Specifically, if the controller 30 does not receive a positive voltage signal, it indicates that the second normally open switch NO2 is in the off state at this time. Based on this, it can be determined that the coil L0 is not energized, that is, in the de-energized state. Then, it can be further determined that the first normally closed contact NC1 is in the closed state and the first normally open contact NO2 is in the off state. Therefore, at this time, the controller 30 can control the first display 21 to display the status information that the coil L0 is in the de-energized state, control the second display 22 to display the status information that the first normally closed contact NC1 is in the closed state, and control the third display 23 to display the status information that the first normally open contact NO2 is in the off state.

[0050] Optionally, Figure 4 is a schematic structural diagram of another training device for the secondary circuit of relay protection provided by an embodiment of the present invention, as Figure 4 shown. The plurality of displays 20 include a fourth display 24 and a fifth display 25. The controller 30 is further configured to control the fourth display 24 to display the status information that the second normally closed contact NC2 is in the off state and control the fifth display 25 to display the status information that the second normally open contact NO2 is in the closed state when receiving a positive voltage signal.

[0051] Specifically, a display 20 corresponding to the second switch group 12 can also be set, that is, a fourth display 24 for displaying the second normally closed contact NC2 and a fifth display 25 for displaying the second normally open contact NO2 are set. Similarly, if the controller 30 receives a positive voltage signal, it can be determined that the second normally open contact NO2 is in the closed state and the second normally closed contact NC2 is in the off state. Then, it can be determined that the coil L0 is in the energized state. At this time, the controller 30 can control the fourth display 24 to display the status information that the second normally closed contact NC2 is in the off state and control the fifth display 25 to display the status information that the second normally open contact NO2 is in the closed state.

[0052] Optionally, referring to Figure 4 , the controller 30 is further configured to control the fourth display 24 to display the status information that the second normally closed contact NC2 is in the closed state and control the fifth display 25 to display the status information that the first normally open contact NO2 is in the conducting state when not receiving a positive voltage signal.

[0053] Specifically, if the controller 30 does not receive a positive voltage signal, it can be determined that the second normally open contact NO2 is in an open state, while the second normally closed contact NC2 is in a closed state. Furthermore, it can be determined that the coil L0 is in a de-energized state. At this time, the fourth display 24 can be controlled to display the status information that the second normally closed contact NC2 is in a closed state, and the fifth display 25 can be controlled to display the status information that the first normally open contact NO2 is in a conducting state. In this way, not only can the status of each contact of the relay 10 provided in the secondary circuit of the relay protection be displayed, but also the status of each contact in the second switching resistance 13 of the relay 10 can be displayed, which can help learners understand the linkage relationship between the relay 10 and the controller 30.

[0054] Optionally, Figure 5 is a schematic structural diagram of another training device for the secondary circuit of the relay protection provided by an embodiment of the present invention. As Figure 5 shown, the training device 00 for the secondary circuit of the relay protection further includes display elements 40 provided in one-to-one correspondence with a plurality of sub-protection circuits 01; each of the plurality of sub-protection circuits 01 is integrated in the corresponding display element 40.

[0055] Specifically, the display element 40 can be understood as a package body, and other components in the circuits where the components of the relay 10 are located can be integrated in the display element 40. In this way, when demonstrating the working principle of the relay to the learners, only the coil and each contact in the relay 10 can be shown to the learners, without showing other devices in the circuit where the relay 10 is located. In this way, by simplifying the presentation form of the secondary circuit of the relay protection, it can further help the learners understand the working principle of the relay.

[0056] Optionally, referring to Figure 5 , the display 20 is provided on the surface of the display element 40.

[0057] Specifically, the display 20 can be provided on one side surface of the display element 40. In this way, there is no need to reserve a separate installation space for the display 20, which can reduce the volume of the training device 00 for the secondary circuit of the relay protection and facilitate transfer or carrying.

[0058] Optionally, continuing to refer to Figure 5 , the first display 21 is provided on the surface of the display element 40 electrically connected to the coil L0; the second display 22 is provided on the surface of the display element 40 electrically connected to the first normally closed contact NC1; the third display 23 is provided on the surface of the display element 40 electrically connected to the first normally open contact NO1.

[0059] Specifically, in combination with the above embodiments, the first display 21 is used to display the status information of the coil L0, the second display 22 is used to display the status information of the first normally closed contact NC1, and the third display 23 is used to display the status information of the first normally open contact NO1. Thus, by setting the first display 21 on the surface of the display element 40 electrically connected to the coil L0, setting the second display 22 on the surface of the display element 40 electrically connected to the first normally closed contact NC1, and setting the third display 23 on the surface of the display element 40 electrically connected to the first normally open contact NO1, the relevance of the coil of the relay 10 and each contact in the secondary circuit of the relay protection can be enhanced, which can help the learners understand the influence of the dynamics in the circuit on the operation of the relay 10 and the relevance between the operations of each contact in the relay 10 and other elements.

[0060] The above specific embodiments do not limit the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A training device for the secondary circuit of relay protection, characterized in that, Comprising: A relay and a plurality of displays; The relay includes a coil and at least one first switch group, and the first switch group includes a first common contact, a first normally open contact, and a first normally closed contact; The secondary protection circuit of the relay protection includes a plurality of sub - protection circuits, and the coil, the first common contact, the first normally open contact, and the second normally open contact are all arranged in each of the sub - protection circuits; Each of the displays is used to display the status information of the coil, the first common contact, the first normally open contact, and the first normally closed contact; The training device of the secondary protection circuit of the relay protection further includes: a controller; The relay further includes a second switch group, and the second switch group includes a second common contact, a second normally open contact, and a second normally closed contact; The second common contact is electrically connected to the positive power supply, the second normally open contact is electrically connected to the controller, and the second normally closed contact is floating or grounded; when the second normally open contact is closed, the positive voltage signal provided by the positive power supply is transmitted to the controller through the closed second normally open contact; The controller is also electrically connected to each display, and the controller is configured to control each display to display the status information of the coil, the first normally open contact, and the first normally closed contact when receiving the positive voltage signal; The plurality of displays include a first display, a second display, and a third display; The controller is configured to control the first display to display the status information that the coil is in the energized state, control the second display to display the status information that the first normally closed contact is in the open state, and control the third display to display the status information that the first normally open contact is in the closed state when receiving the positive voltage signal; The controller is also configured to control the first display to display the status information that the coil is in the de - energized state, control the second display to display the status information that the first normally closed contact is in the closed state, and control the third display to display the status information that the first normally open contact is in the open state when not receiving the positive voltage signal.

2. The training device for the secondary circuit of the relay protection according to claim 1, characterized in that, The plurality of displays include a fourth display and a fifth display; The controller is also configured to control the fourth display to display the status information that the second normally closed contact is in the open state, and control the fifth display to display the status information that the second normally open contact is in the closed state when receiving the positive voltage signal.

3. The training device of the secondary protection circuit of the relay protection according to claim 2, wherein The controller is also configured to control the fourth display to display the status information that the second normally closed contact is in the closed state, and control the fifth display to display the status information that the second normally open contact is in the conducting state when not receiving the positive voltage signal.

4. The training device for the secondary circuit of the relay protection according to claim 1, characterized in that, Further comprising: Display elements provided in one - to - one correspondence with the plurality of sub - protection circuits; Each of the plurality of sub - protection circuits is integrated in the corresponding display element.

5. The training device for the secondary circuit of relay protection according to claim 4, wherein The display is arranged on the surface of the display element.

6. The training device for the secondary circuit of the relay protection according to claim 5, characterized in that The first display is arranged on the surface of the display element electrically connected to the coil; The second display is disposed on the surface of the display element electrically connected to the first normally-closed contact; The third display is disposed on the surface of the display element electrically connected to the first normally-open contact.

7. The training device for the secondary circuit of relay protection according to claim 1, characterized in that, Each of the displays is specifically configured to display the status information of the coil, the first common contact, the first normally-open contact, and the first normally-closed contact through video animations.

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