Rapid detection device for relay protection tripping matrix of power system

Abstract

The utility model provides an electric power system relay protection tripping matrix rapid detection device comprising a box body, and a control circuit is integrated in the box body; the control circuit comprises a first alternating current air switch, the other end of the first alternating current air switch is connected with one end of a second alternating current air switch, and the other end of the second alternating current air switch is connected with a relay control loop; the relay control loop comprises a knob switch and a static intermediate relay; the knob switch is connected in series with a coil contact in the static intermediate relay; a signal indication loop is connected between the first alternating current air switch and the second alternating current air switch; the signal indication loop comprises a plurality of signal lamps which are connected in series with a normally open contact in the static intermediate relay; two sides of each group of normally open contacts in the static intermediate relay are connected in parallel with a group of plug protection loops. The device can directly judge whether the tripping contact is switched on or not by observing the state of the signal lamp, so that the state of the tripping outlet contact is judged, the test time is greatly saved, and the labor intensity of verification personnel is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric detection of power systems, in particular to a rapid detection device for a relay protection tripping matrix of a power system. Background Art

[0002] The operation behavior of relay protection devices in power systems is related to the safety of the power grid. Errors in their wiring, setting, and device settings may cause false operation or failure to operate of the protection devices. The tripping output circuits of the protection devices of some important equipment are relatively complex. Therefore, these protection devices are equipped with an output matrix model. Errors in the setting and configuration of the output matrix may also cause false operation or failure to operate of the protection, endangering the safety and stability of the power grid.

[0003] The trip matrix of the power system relay protection device is a trip signal transmission method based on the power system relay protection device. It realizes the detection and tripping of various faults through the matrix combination of trip signals. When a fault occurs in the power system, the relay protection device will send a trip command to the trip matrix after detecting the fault signal, so that the relevant switches can selectively complete the tripping exit according to a certain time sequence, thereby achieving the purpose of protecting the power system and personal safety.

[0004] The trip matrix plays a vital role in power system relay protection because it can detect and cut off any potential faults that may cause damage to the power system. It requires regular inspection and maintenance, especially when newly installed or after technical transformation and overhaul of relay protection devices are put into operation. Trip matrix detection and verification must be performed on all protection types to verify which output circuits are activated for each type of protection and whether the action sequence is correct, to ensure that the relay protection meets the reliability and selectivity requirements when a system fault occurs.

[0005] At present, the trip matrix is detected and checked by a multimeter. That is, after the trip matrix is powered on, the detection head of the multimeter is used to connect the contacts in the trip matrix separately, and the multimeter is used to detect and check multiple trip output contacts in the trip matrix one by one. Although this tool can complete the detection of the trip matrix, it is necessary to connect the detection tool to the trip matrix multiple times, which takes a long time and increases the workload of the detection personnel, resulting in low detection efficiency. In addition, during the detection process, due to the large number of connection contacts in the trip matrix, it is easy to miss detections during the detection and verification process. Utility Model Content

[0006] In order to solve the problems in the prior art of using a multimeter to detect and check multiple trip output contacts in a trip matrix one by one, which has low detection efficiency and is prone to missed detection during the retrieval process, the utility model provides a power system relay protection trip matrix rapid detection device.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] The utility model proposes a power system relay protection trip matrix rapid detection device, comprising a box body, wherein a control circuit is integrated in the box body;

[0009] The control circuit includes a power connector Y, one end of a first AC circuit breaker JK is connected to the power connector Y, the other end of the first AC circuit breaker JK is connected to one end of a second AC circuit breaker ZJK, and the other end of the second AC circuit breaker ZJK is connected to a relay control circuit;

[0010] The relay control circuit includes a knob switch SK and a static intermediate relay ZJ, and the knob switch SK is connected in series with the coil contact in the static intermediate relay ZJ;

[0011] A signal indication circuit is connected to the circuit connected between the first AC circuit breaker JK and the second AC circuit breaker ZJK;

[0012] The signal indication circuit includes a plurality of signal lamps connected in series with the normally open contacts in the static intermediate relay ZJ, and each group of normally open contacts in the static intermediate relay ZJ is connected in series with one signal lamp;

[0013] A set of plug protection circuits are connected in parallel on both sides of each set of normally open contacts in the static intermediate relay ZJ;

[0014] The plug-in protection circuit includes aviation sockets CZ connected in parallel to both sides of each group of normally open contacts in the static intermediate relay ZJ, and the aviation sockets CZ are connected to the protection device outlet circuit.

[0015] Preferably, the signal indication circuit includes ten signal lights, namely a first signal light, a second signal light, a third signal light, a fourth signal light, a fifth signal light, a sixth signal light, a seventh signal light, an eighth signal light, a ninth signal light and a tenth signal light;

[0016] Wherein, the first signal light is connected in series with the third contact in the static intermediate relay ZJ;

[0017] The second signal lamp is connected in series with the fifth contact of the static intermediate relay ZJ;

[0018] The third signal light is connected in series with the seventh contact in the static intermediate relay ZJ;

[0019] The fourth signal light is connected in series with the ninth contact in the static intermediate relay ZJ;

[0020] The fifth signal light is connected in series with the 11th contact in the static intermediate relay ZJ;

[0021] The sixth signal light is connected in series with the 12th contact in the static intermediate relay ZJ;

[0022] The seventh signal light is connected in series with the 13th contact in the static intermediate relay ZJ;

[0023] The eighth signal light is connected in series with the 17th contact in the static intermediate relay ZJ;

[0024] The ninth signal light is connected in series with the nineteenth contact in the static intermediate relay ZJ;

[0025] The tenth signal light is connected in series with the 21st contact in the static intermediate relay ZJ.

[0026] Preferably, the protection device outlet circuit includes an outlet relay contact and an outlet pressure plate connected in series.

[0027] Preferably, the power connector Y is a common single-phase 3-pin 5A power plug.

[0028] Preferably, the specification of the first AC circuit breaker JK is 2P and the rated current is 5A.

[0029] Preferably, the specification of the second AC circuit breaker ZJK is 2P and the rated current is 2A.

[0030] Preferably, the model of the knob switch SK is LAY39.

[0031] Preferably, the indicator light is a red indicator light.

[0032] Preferably, the model of the red indicator light is AD16-22D.

[0033] Preferably, the model of the static intermediate relay ZJ is JZ-7GY-L000K.

[0034] Compared with the prior art, the present invention has the following beneficial technical effects:

[0035] The utility model proposes a rapid detection device for a relay protection tripping matrix of a power system, which ensures the flexibility and safety of power supply access through the first AC circuit breaker JK and the second AC circuit breaker ZJK, facilitates maintenance or testing without interrupting the main circuit power supply, and reduces operational risks. Then, in the signal indication circuit, the normally open contacts of each group of static intermediate relays ZJ correspond to a signal light. It is only necessary to insert the power plug into the AC220V maintenance power socket, and by observing the status of the signal light, it is possible to directly determine whether the tripping contact is connected, and then determine whether the tripping outlet contact corresponds to the outlet pressure plate wiring, and whether the sequence of each protection tripping is correct, which greatly saves test time. Moreover, through the indicator light, it is possible to intuitively and accurately understand whether the tripping outlet circuit is connected, the connection time, and the sequence are correct, thereby reducing the labor intensity of the calibration personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a structural diagram of a power system relay protection trip matrix rapid detection device provided by the utility model;

[0037] Figure 2 This is a circuit diagram of a power system relay protection trip matrix rapid detection device provided by the utility model; DETAILED DESCRIPTION

[0038] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0041] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0044] See also Figure 1 and Figure 2 The utility model discloses a rapid detection device for a relay protection tripping matrix of a power system, comprising a box body, a control circuit integrated in the box body, the control circuit comprising a power connector Y, one end of a first AC circuit breaker JK being connected to the power connector Y, the other end of the first AC circuit breaker JK being connected to one end of a second AC circuit breaker ZJK, the other end of the second AC circuit breaker ZJK being connected to a relay control circuit;

[0045] The relay control circuit includes a rotary switch SK and a static intermediate relay ZJ, wherein the rotary switch SK is connected in series with the coil contacts in the static intermediate relay ZJ;

[0046] A signal indication circuit is connected to the circuit between the first AC circuit breaker JK and the second AC circuit breaker ZJK;

[0047] The signal indication circuit includes a plurality of signal lamps connected in series with the normally open contacts in the static intermediate relay ZJ, and each group of normally open contacts in the static intermediate relay ZJ is connected in series with a corresponding signal lamp;

[0048] Preferably, the signal indication circuit includes ten signal lights, namely a first signal light, a second signal light, a third signal light, a fourth signal light, a fifth signal light, a sixth signal light, a seventh signal light, an eighth signal light, a ninth signal light and a tenth signal light;

[0049] Among them, the first signal light is connected in series with the third contact in the static intermediate relay ZJ; the second signal light is connected in series with the fifth contact in the static intermediate relay ZJ; the third signal light is connected in series with the seventh contact in the static intermediate relay ZJ; the fourth signal light is connected in series with the ninth contact in the static intermediate relay ZJ; the fifth signal light is connected in series with the eleventh contact in the static intermediate relay ZJ; the sixth signal light is connected in series with the twelfth contact in the static intermediate relay ZJ; the seventh signal light is connected in series with the thirteenth contact in the static intermediate relay ZJ; the eighth signal light is connected in series with the seventeenth contact in the static intermediate relay ZJ; the ninth signal light is connected in series with the nineteenth contact in the static intermediate relay ZJ; and the tenth signal light is connected in series with the twenty-first contact in the static intermediate relay ZJ.

[0050] Each set of normally open contacts in the static intermediate relay ZJ is connected in parallel with a set of plug-in protection circuits on both sides;

[0051] The plug-in protection circuit includes aviation sockets CZ connected in parallel on both sides of each group of normally open contacts in the static intermediate relay ZJ, that is, the first connecting point of the aviation socket CZ connected in parallel on both sides of the first group of normally open contacts corresponding to the second and third contacts in the static intermediate relay ZJ, the second connecting point of the aviation socket CZ connected in parallel on both sides of the second group of normally open contacts corresponding to the fourth and fifth contacts in the static intermediate relay ZJ, the third connecting point of the aviation socket CZ connected in parallel on both sides of the third group of normally open contacts corresponding to the sixth and seventh contacts in the static intermediate relay ZJ, and the fourth connecting point of the aviation socket CZ connected in parallel on both sides of the fourth group of normally open contacts corresponding to the eighth and ninth contacts in the static intermediate relay ZJ. The fourth docking point of Z, the fifth docking point of the aviation socket CZ on both sides of the fifth group of normally open contacts corresponding to the 10th and 11th contacts in the static intermediate relay ZJ, the sixth docking point of the aviation socket CZ on both sides of the sixth group of normally open contacts corresponding to the 12th and 13th contacts in the static intermediate relay ZJ, the seventh docking point of the aviation socket CZ on both sides of the seventh group of normally open contacts corresponding to the 14th and 15th contacts in the static intermediate relay ZJ, the eighth docking point of the aviation socket CZ on both sides of the eighth group of normally open contacts corresponding to the 16th and 17th contacts in the static intermediate relay ZJ, the eighth docking point of the aviation socket CZ on both sides of the eighth group of normally open contacts corresponding to the 18th contact in the static intermediate relay ZJ. The ninth pair of normally open contacts corresponding to the first and the 19th contact are connected in parallel on both sides of the ninth pair of normally open contacts of the aviation socket CZ. The tenth pair of normally open contacts corresponding to the 20th and 21st contacts in the static intermediate relay ZJ are connected in parallel on both sides of the aviation socket CZ. A protection device outlet circuit is connected between each pair of points on the aviation socket CZ. The protection device outlet circuit includes an outlet relay contact and an outlet pressure plate. The outlet relay contact and the outlet pressure plate are connected in series, and multiple groups are provided. The number of groups of the protection device outlet circuit corresponds to the number of contact pairs on the aviation socket CZ, that is, a first outlet circuit is provided between the first docking points, and a second outlet circuit is provided between the second docking points. A third outlet circuit is arranged between the third docking points, a fourth outlet circuit is arranged between the fourth docking points, a fifth outlet circuit is arranged between the fifth docking points, a sixth outlet circuit is arranged between the sixth docking points, a seventh outlet circuit is arranged between the seventh docking points, an eighth outlet circuit is arranged between the eighth docking points, a ninth outlet circuit is arranged between the ninth docking points, and a tenth outlet circuit is arranged between the tenth docking points, wherein the first outlet circuit, the second outlet circuit, the third outlet circuit, the fourth outlet circuit, the fifth outlet circuit, the sixth outlet circuit, the seventh outlet circuit, the eighth outlet circuit, the ninth outlet circuit and the tenth outlet circuit are connected in parallel.

[0052] The aviation socket CZ, static intermediate relay ZJ, power connector Y, first AC circuit breaker JK and second AC circuit breaker ZJK are all installed on an epoxy resin board inside the box. The circuit connections between these components are connected by wires; among them, the power connector Y is an ordinary single-phase 3-pin 5A power plug, the specification of the first AC circuit breaker JK is 2P, the rated current is 5A, the specification of the second AC circuit breaker ZJK is 2P, the rated current is 2A; the model of the knob switch SK is LAY39, and the indicator light is a red indicator light, numbered in sequence as the first red signal indicator light 1HD, the second red signal indicator light 2HD, the third red signal indicator light 3HD, the fourth red signal indicator light 4HD, the fifth red signal indicator light 5HD, the sixth red signal indicator light 6HD, the seventh red signal indicator light 7HD, the eighth red signal indicator light 8HD, the ninth red signal indicator light 9HD, and the tenth red signal indicator light 10HD The first red signal indicator light 1 is connected to the first docking point and the third contact, the second red signal indicator light 2 is connected to the second docking point and the fifth contact, the third red signal indicator light 3 is connected to the third docking point and the seventh contact, the fourth red signal indicator light 4 is connected to the fourth docking point and the ninth contact, the fifth red signal indicator light 5 is connected to the fifth docking point and the eleventh contact, the sixth red signal indicator light 6 is connected to the sixth docking point and the thirteenth contact, the seventh red signal indicator light 7 is connected to the seventh docking point and the fifteenth contact, the eighth red signal indicator light 8 is connected to the eighth docking point and the seventeenth contact, the ninth red signal indicator light 9 is connected to the ninth docking point and the nineteenth contact, and the tenth red signal indicator light 10 is connected to the tenth docking point and the twenty-first contact. The model of the red indicator lights is AD16-22D. The model of the static intermediate relay ZJ is JZ-7GY-L000K.

[0053] This device is inserted into the AC220V maintenance power socket of the production site through the power connector Y to provide AC power input for the device.

[0054] Close the second AC circuit breaker ZJK, turn on the knob switch SK, energize the static intermediate relay ZJ, and its 10 groups of normally open contacts are turned on. Because the 10 groups of normally open contact signal lights of the static intermediate relay ZJ are connected in series, that is, the first group of normally open contacts and the first red signal indicator 1HD, the second group of normally open contacts and the second red signal indicator 2HD, the third group of normally open contacts and the third red signal indicator 3HD, the fourth group of normally open contacts and the fourth red signal indicator 4HD, the fifth group of normally open contacts and the fifth red signal indicator 5HD, the sixth group of normally open contacts and the sixth red signal indicator 6HD, the seventh group of normally open contacts and the seventh red signal indicator 7HD, the eighth group of normally open contacts and the eighth red signal indicator 8HD, and the ninth group of normally open contacts and the ninth red signal indicator 9H D. If the tenth group of normally open contacts and the tenth red signal indicator light 10HD, the first red signal indicator light 1HD, the second red signal indicator light 2HD, the third red signal indicator light 3HD, the fourth red signal indicator light 4HD, the fifth red signal indicator light 5HD, the sixth red signal indicator light 6HD, the seventh red signal indicator light 7HD, the eighth red signal indicator light 8HD, the ninth red signal indicator light 9HD and the tenth red signal indicator light 10HD are all lit, it means that the tripping output contacts are good. Quickly detect the condition of the tripping output contacts, check which switches to trip, the tripping time and the tripping sequence according to the setting list, and quickly determine whether the actual tripping logic of the protection device is completely consistent with the setting list by observing the lighting of the corresponding signal lights.

[0055] When debugging the protection device, disconnect the external cable of the protection device outlet tripping, and introduce the 10 pairs of outlet tripping contact circuits of the protection device to be inspected into the tripping matrix rapid detection device through the wires and aviation plug CZ. Each pair of outlet contact circuits is connected in series with a signal light and connected to the matrix monitoring power supply. After each pair of outlet tripping contact circuits is connected, the corresponding signal light will light up, and it will automatically detect whether the tripping outlet contacts are in good condition, whether the tripping outlet contacts correspond to the outlet pressure plate wiring, and observe the changes in the signal lights to determine whether the tripping sequence of each protection is correct.

[0056] This device is equipped with a self-checking function. Through multiple groups of normally open contacts in a static intermediate relay ZJ, it can automatically check whether the signal light is intact. Close the second AC circuit breaker ZJK, turn on the knob switch SK, and energize the static intermediate relay ZJ. If the signal light is on, it means that the signal light is intact. If a light does not light up, it proves that there is a problem with the light and a new signal light needs to be replaced.

[0057] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0058] In addition, it should be understood that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This description is for clarity only. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for the purpose of illustrating the technical concept of the present utility model and cannot be used to limit the scope of protection of the present utility model. Any changes made based on the technical solution in accordance with the technical concept proposed by the present utility model shall fall within the scope of protection of the claims of the present utility model.

Claims

1. A power system relay protection trip matrix rapid detection device, characterized in that: It comprises a box body, wherein a control circuit is integrated in the box body; The control circuit includes a power connector Y, one end of a first AC circuit breaker JK is connected to the power connector Y, the other end of the first AC circuit breaker JK is connected to one end of a second AC circuit breaker ZJK, and the other end of the second AC circuit breaker ZJK is connected to a relay control circuit; The relay control circuit includes a knob switch SK and a static intermediate relay ZJ, and the knob switch SK is connected in series with the coil contact in the static intermediate relay ZJ; A signal indication circuit is connected to the circuit connected between the first AC circuit breaker JK and the second AC circuit breaker ZJK; The signal indication circuit includes a plurality of signal lamps connected in series with the normally open contacts in the static intermediate relay ZJ, and each group of normally open contacts in the static intermediate relay ZJ is connected in series with one signal lamp; A set of plug protection circuits are connected in parallel on both sides of each set of normally open contacts in the static intermediate relay ZJ; The plug-in protection circuit includes aviation sockets CZ connected in parallel to both sides of each group of normally open contacts in the static intermediate relay ZJ, and the aviation sockets CZ are connected to the protection device outlet circuit.

2. A power system relay protection trip matrix rapid detection device according to claim 1, characterized in that: The signal indicator circuit includes ten signal lights, namely a first signal light, a second signal light, a third signal light, a fourth signal light, a fifth signal light, a sixth signal light, a seventh signal light, an eighth signal light, a ninth signal light and a tenth signal light; Wherein, the first signal light is connected in series with the third contact in the static intermediate relay ZJ; The second signal lamp is connected in series with the fifth contact of the static intermediate relay ZJ; The third signal light is connected in series with the seventh contact in the static intermediate relay ZJ; The fourth signal light is connected in series with the ninth contact in the static intermediate relay ZJ; The fifth signal light is connected in series with the 11th contact in the static intermediate relay ZJ; The sixth signal light is connected in series with the 12th contact in the static intermediate relay ZJ; The seventh signal light is connected in series with the 13th contact in the static intermediate relay ZJ; The eighth signal light is connected in series with the 17th contact in the static intermediate relay ZJ; The ninth signal light is connected in series with the nineteenth contact in the static intermediate relay ZJ; The tenth signal light is connected in series with the 21st contact of the static intermediate relay ZJ; The model of the static intermediate relay ZJ is JZ-7GY-L000K.

3. A power system relay protection trip matrix rapid detection device according to claim 1, characterized in that: The protection device outlet circuit includes an outlet relay contact and an outlet pressure plate connected in series.

4. A power system relay protection trip matrix rapid detection device according to claim 1, characterized in that: The power connector Y is a common single-phase 3-pin 5A power plug.

5. The power system relay protection trip matrix rapid detection device according to claim 1, characterized in that: The specification of the first AC circuit breaker JK is 2P and the rated current is 5A.

6. A power system relay protection trip matrix rapid detection device according to claim 1, characterized in that: The specification of the second AC circuit breaker ZJK is 2P and the rated current is 2A.

7. A power system relay protection trip matrix rapid detection device according to claim 1, characterized in that: The model of the knob switch SK is LAY39.

8. A power system relay protection trip matrix rapid detection device according to claim 2, characterized in that: The indicator light is a red indicator light.

9. A power system relay protection trip matrix rapid detection device according to claim 8, characterized in that: The model of the red indicator light is AD16-22D.

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