Detection system of operation loop

Abstract

The embodiment of the utility model provides a detection system for an operation loop, and the system comprises a closing loop detection circuit which is provided with a first current input end and a first signal output end, and comprises a first optical coupler, and the first current input end is connected with the first signal output end through the first optical coupler; the opening loop detection circuit is provided with a second current input end and a second signal output end and comprises a second optical coupler, and the second current input end is connected with the second signal output end through the second optical coupler; and the controller is respectively connected with the first signal output end and the second signal output end and is used for receiving the first voltage signal of the first signal output end and the second voltage signal of the second signal output end and outputting the working state of the operation loop. According to the embodiment of the invention, the working state of the operation loop can be determined through the first voltage signal of the first signal output end and the second voltage signal of the second signal output end, so that the disconnection detection of the operation loop is realized.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to a detection system for an operating circuit. Background Technology

[0002] In related technologies, the detection of operational circuit breaks is increasingly important, playing a crucial role in the safety of existing power distribution networks. Traditional operational circuit detection methods mainly rely on switch position signals or external operating modules. However, these methods have significant limitations: detection using switch position signals often suffers from inaccuracy and low reliability; while using external operating modules increases system costs. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a detection system for an operating circuit, designed to detect open circuits in the operating circuit.

[0004] In a first aspect, embodiments of this application provide a detection system for an operating loop, comprising:

[0005] The closing circuit detection circuit is provided with a first current input terminal and a first signal output terminal, including a first optocoupler, wherein the first current input terminal is connected to the first signal output terminal through the first optocoupler;

[0006] The circuit for detecting the tripping circuit is provided with a second current input terminal and a second signal output terminal, including a second optocoupler. The second current input terminal is connected to the second signal output terminal through the second optocoupler.

[0007] The controller is connected to the first signal output terminal and the second signal output terminal respectively, and is used to receive the first voltage signal from the first signal output terminal and the second voltage signal from the second signal output terminal, and output the working status of the operation circuit.

[0008] According to some embodiments of this application, the closing circuit detection circuit is further provided with a first current output terminal, which is connected to the first optocoupler.

[0009] According to some embodiments of this application, the tripping circuit detection circuit is further provided with a second current output terminal, and the second current input terminal is connected to the second optocoupler.

[0010] According to some embodiments of this application, the closing circuit detection circuit further includes:

[0011] First resistor, second resistor, first transistor, and second transistor;

[0012] One end of the first resistor is connected to the first current input terminal, and the other end is connected to one end of the first transistor and the first end of the first optocoupler, respectively; one end of the second resistor is connected to the other end of the first transistor and the second end of the first optocoupler, respectively, and the other end is connected to the first current output terminal through the second transistor.

[0013] According to some embodiments of this application, the closing circuit detection circuit further includes:

[0014] The third and fourth resistors;

[0015] The first resistor is connected to the first end of the first optocoupler through the third resistor; one end of the fourth resistor is connected to the third resistor, and the other end is connected to the second resistor.

[0016] According to some embodiments of this application, the closing circuit detection circuit further includes:

[0017] First capacitor and second capacitor;

[0018] One end of the first capacitor is connected to the third resistor, and the other end is connected to the second resistor; one end of the second capacitor is connected to the third terminal of the first optocoupler, and the other end is connected to the fourth terminal of the first optocoupler.

[0019] According to some embodiments of this application, the tripping circuit detection circuit further includes:

[0020] The fifth resistor, the sixth resistor, the third transistor, and the fourth transistor;

[0021] One end of the fifth resistor is connected to the second current input terminal, and the other end is connected to one end of the third transistor and the first end of the second optocoupler, respectively; one end of the sixth resistor is connected to the other end of the third transistor and the second end of the second optocoupler, respectively, and the other end is connected to the second current output terminal through the fourth transistor.

[0022] According to some embodiments of this application, the tripping circuit detection circuit further includes:

[0023] The seventh and eighth resistors;

[0024] The fifth resistor is connected to the first end of the second optocoupler through the seventh resistor; one end of the eighth resistor is connected to the seventh resistor, and the other end is connected to the sixth resistor.

[0025] According to some embodiments of this application, the tripping circuit detection circuit further includes:

[0026] The third and fourth capacitors;

[0027] One end of the third capacitor is connected to the seventh resistor, and the other end is connected to the sixth resistor; one end of the fourth capacitor is connected to the third end of the second optocoupler, and the other end is connected to the fourth end of the second optocoupler.

[0028] According to some embodiments of this application, the third end of the first optical coupler and the third end of the second optical coupler are connected to ground, the fourth end of the first optical coupler is connected to the first signal output terminal, and the fourth end of the second optical coupler is connected to the second signal output terminal.

[0029] According to the technical solution of the embodiments of this application, at least the following beneficial effects are achieved: The embodiments of this application propose a detection system for an operating circuit, comprising: a closing circuit detection circuit, having a first current input terminal and a first signal output terminal, including a first optocoupler, the first current input terminal being connected to the first signal output terminal through the first optocoupler; a opening circuit detection circuit, having a second current input terminal and a second signal output terminal, including a second optocoupler, the second current input terminal being connected to the second signal output terminal through the second optocoupler; and a controller, connected to both the first and second signal output terminals, for receiving a first voltage signal from the first signal output terminal and a second voltage signal from the second signal output terminal, and outputting the operating state of the operating circuit. The embodiments of this application can determine the operating state of the operating circuit through the first voltage signal from the first signal output terminal and the second voltage signal from the second signal output terminal, thereby achieving open circuit detection of the operating circuit.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments of this utility model are described below. It should be understood that the drawings described below are only for the convenience of clearly illustrating some embodiments of the technical solutions of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The utility model will be further described below in conjunction with the drawings and embodiments:

[0032] Figure 1 This is a schematic diagram of the structure of a detection system for an operating loop provided in one embodiment of this application;

[0033] Figure 2 This is a circuit diagram of an operation loop detection system provided in one embodiment of this application. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0035] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] In this utility model, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] In some situations, the detection of operational circuit breaks is becoming increasingly important, playing a crucial role in the safety of existing distribution networks. Traditional operational circuit detection methods mainly rely on switch position signals or external operating modules. However, these methods have significant limitations: detection using switch position signals often suffers from inaccuracy and low reliability; while using external operating modules increases system costs.

[0040] Based on the above, this application proposes a detection system for operating circuits, which aims to detect open circuits in operating circuits.

[0041] The various embodiments of the detection system for the operating loop of this application will be further described below with reference to the accompanying drawings.

[0042] like Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the structure of a detection system for an operating loop provided in one embodiment of this application; Figure 2 This is a circuit diagram of an operation loop detection system provided in one embodiment of this application.

[0043] In one embodiment, the operation circuit detection system includes a closing circuit detection circuit 100, a opening circuit detection circuit 200, and a controller 300.

[0044] It is understood that the closing circuit detection circuit 100 is provided with a first current input terminal and a first signal output terminal, including a first optocoupler 110, and the first current input terminal is connected to the first signal output terminal through the first optocoupler 110.

[0045] It is understood that the trip circuit detection circuit 200 is provided with a second current input terminal and a second signal output terminal, including a second optocoupler 210, and the second current input terminal is connected to the second signal output terminal through the second optocoupler 210.

[0046] It is understood that the controller 300 is connected to the first signal output terminal and the second signal output terminal respectively, and is used to receive the first voltage signal from the first signal output terminal and the second voltage signal from the second signal output terminal, and output the working status of the operation circuit.

[0047] It is worth noting that, in this embodiment of the application, the operating state of the operating circuit can be determined by the first voltage signal at the first signal output terminal and the second voltage signal at the second signal output terminal, thereby realizing the detection of the disconnection of the operating circuit.

[0048] It is understandable that when the first voltage signal is high, it indicates that the closing circuit detection circuit 100 is open; when the first voltage signal is low, it indicates that the closing circuit detection circuit 100 is on; when the second voltage signal is high, it indicates that the opening circuit detection circuit 200 is open; and when the second voltage signal is low, it indicates that the opening circuit detection circuit 200 is on.

[0049] It is understandable that at the same time, when the first voltage signal is high and the second voltage signal is low, it indicates that the operating circuit is in normal working condition.

[0050] It is understandable that at the same time, when the first voltage signal is low and the second voltage signal is high, it indicates that the operating circuit is in normal working condition.

[0051] It is understandable that if the first voltage signal is high and the second voltage signal is high at the same time, it indicates that the operating circuit is in an abnormal working state.

[0052] It is understandable that if the first voltage signal is low and the second voltage signal is low at the same time, it indicates that the operating circuit is in an abnormal working state.

[0053] It is understandable that when the controller first determines that the operation loop is in an abnormal working state, a preset time delay can be added to re-evaluate the operation loop and avoid misjudgment of the operation loop. The preset time can be 2 seconds, 3 seconds, or 5 seconds, and can be set according to actual needs. This application embodiment does not specifically limit the preset time.

[0054] Understandably, if it is determined that the operating circuit is in an abnormal working state, an SOE message can be sent to the distribution master station to report the fault so that the operating circuit can be handled and repaired.

[0055] It is understood that in this embodiment of the application, the detection current is input through the first current input terminal and the second current input terminal respectively to realize the detection of the operation circuit. The magnitude of the detection current can be 1mA, which can be set according to actual needs. This embodiment of the application does not specifically limit it.

[0056] In another embodiment, the closing circuit detection circuit 100 is further provided with a first current output terminal, which is connected to the first optocoupler 110.

[0057] It is understandable that when the detection current at the first current input terminal flows to the first current output terminal through the first optocoupler 110, it indicates that the closing circuit detection circuit 100 is in a conducting state at this time.

[0058] Understandably, the first current output terminal is connected to the closing output.

[0059] In another embodiment, the tripping circuit detection circuit 200 is further provided with a second current output terminal, and the second current input terminal is connected to the second optocoupler 210.

[0060] It is understandable that when the detection current at the second current input terminal flows to the second current output terminal through the second optocoupler 210, it indicates that the tripping circuit detection circuit 200 is in a conducting state at this time.

[0061] Understandably, the second current output terminal is connected to the trip outlet.

[0062] In another embodiment, the closing circuit detection circuit 100 further includes: a first resistor R1, a second resistor R2, a first transistor D1, and a second transistor D2.

[0063] It is understood that one end of the first resistor R1 is connected to the first current input terminal, and the other end is connected to one end of the first transistor D1 and the first terminal of the first optocoupler 110 respectively; one end of the second resistor R2 is connected to the other end of the first transistor D1 and the second terminal of the first optocoupler 110 respectively, and the other end is connected to the first current output terminal through the second transistor D2.

[0064] It is understandable that the first transistor D1 mentioned above can be a transient suppression diode, whose biggest advantages are high response speed, low on-resistance, and high power processing capability. The type of the first transistor D1 can be selected according to actual needs, and will not be specifically limited here.

[0065] It is understandable that the second transistor D2 mentioned above can be a Schottky diode, whose biggest advantages are low impedance, small forward voltage drop, and fast recovery speed. It is used in high-frequency high-current rectification and power reduction protection circuits. Rectifier diodes, diode thyristors, etc. can also be used. The type of the second transistor D2 can be selected according to actual needs, and no specific limitation is made here.

[0066] In another embodiment, the closing circuit detection circuit 100 further includes a third resistor R3 and a fourth resistor R4.

[0067] It is understandable that the first resistor R1 is connected to the first end of the first optocoupler 110 through the third resistor R3; one end of the fourth resistor R4 is connected to the third resistor R3, and the other end is connected to the second resistor R2.

[0068] In another embodiment, the closing circuit detection circuit 100 further includes a first capacitor C1 and a second capacitor C2.

[0069] It is understood that one end of the first capacitor C1 is connected to the third resistor R3, and the other end is connected to the second resistor R2; one end of the second capacitor C2 is connected to the third terminal of the first optocoupler 110, and the other end is connected to the fourth terminal of the first optocoupler 110.

[0070] It is understood that the first capacitor C1 and the second capacitor C2 mentioned above refer to capacitors capable of charging and discharging. Capacitors are mainly divided into aluminum electrolytic capacitors, ceramic capacitors, and mica capacitors. Among them, aluminum electrolytic capacitors are characterized by large capacitance and positive and negative polarity, making them suitable for power supply filtering or low-frequency circuits; ceramic capacitors are characterized by small size, good heat resistance, low loss, and high insulation resistance, but small capacitance, making them suitable for high-frequency circuits; mica capacitors are characterized by low dielectric loss, high insulation resistance, and a small temperature coefficient, making them suitable for high-frequency circuits. The type of the first capacitor C1 and the second capacitor C2 mentioned above can be selected according to the actual situation, and will not be specifically limited here.

[0071] In another embodiment, the tripping circuit detection circuit 200 further includes: a fifth resistor R5, a sixth resistor R6, a third transistor D3, and a fourth transistor D4.

[0072] It is understandable that one end of the fifth resistor R5 is connected to the second current input terminal, and the other end is connected to one end of the third transistor D3 and the first end of the second optocoupler 210 respectively; one end of the sixth resistor R6 is connected to the other end of the third transistor D3 and the second end of the second optocoupler 210 respectively, and the other end is connected to the second current output terminal through the fourth transistor D4.

[0073] It is understandable that a transient suppression diode can be selected for the third transistor D3 mentioned above. Its biggest advantages are high response speed, low on-resistance, and high power handling capability. The type of the third transistor D3 can be selected according to actual needs, and no specific limitation is made here.

[0074] Understandably, the fourth transistor D4 mentioned above can be a Schottky diode, whose biggest advantages are low impedance, small forward voltage drop, and fast recovery speed. It is used in high-frequency high-current rectification and power reduction protection circuits. Rectifier diodes, diode thyristors, etc. can also be used. The type of the fourth transistor D4 can be selected according to actual needs, and no specific restrictions are imposed here.

[0075] In another embodiment, the tripping circuit detection circuit 200 further includes a seventh resistor R7 and an eighth resistor R8.

[0076] Understandably, the fifth resistor R5 is connected to the first end of the second optocoupler 210 through the seventh resistor R7; one end of the eighth resistor R8 is connected to the seventh resistor R7, and the other end is connected to the sixth resistor R6.

[0077] In another embodiment, the tripping circuit detection circuit 200 further includes a third capacitor C3 and a fourth capacitor C4.

[0078] It is understandable that one end of the third capacitor C3 is connected to the seventh resistor R7, and the other end is connected to the sixth resistor R6; one end of the fourth capacitor C4 is connected to the third terminal of the second optocoupler 210, and the other end is connected to the fourth terminal of the second optocoupler 210.

[0079] It is understood that the third capacitor C3 and the fourth capacitor C4 mentioned above refer to capacitors capable of charging and discharging. Capacitors are mainly divided into aluminum electrolytic capacitors, ceramic capacitors, and mica capacitors. Among them, aluminum electrolytic capacitors are characterized by large capacitance and positive and negative polarity, making them suitable for power supply filtering or low-frequency circuits; ceramic capacitors are characterized by small size, good heat resistance, low loss, and high insulation resistance, but small capacitance, making them suitable for high-frequency circuits; mica capacitors are characterized by low dielectric loss, high insulation resistance, and a small temperature coefficient, making them suitable for high-frequency circuits. The types of the third capacitor C3 and the fourth capacitor C4 mentioned above can be selected according to the actual situation, and are not specifically limited here.

[0080] In another embodiment, the third end of the first optical coupler 110 and the third end of the second optical coupler 210 are connected to ground, the fourth end of the first optical coupler 110 is connected to the first signal output terminal, and the fourth end of the second optical coupler 210 is connected to the second signal output terminal.

[0081] The above provides a detailed description of the preferred embodiments of this application. However, this application is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A detection system for an operating circuit, characterized in that, include: The closing circuit detection circuit is provided with a first current input terminal and a first signal output terminal, including a first optocoupler, wherein the first current input terminal is connected to the first signal output terminal through the first optocoupler; The circuit breaker detection circuit is provided with a second current input terminal and a second signal output terminal, including a second optocoupler. The second current input terminal is connected to the second signal output terminal through the second optocoupler. The controller is connected to the first signal output terminal and the second signal output terminal respectively, and is used to receive the first voltage signal from the first signal output terminal and the second voltage signal from the second signal output terminal, and output the working status of the operation circuit.

2. The detection system for the operating circuit according to claim 1, characterized in that, The closing circuit detection circuit is also provided with a first current output terminal, which is connected to the first optocoupler.

3. The detection system for the operating circuit according to claim 1, characterized in that, The circuit breaker detection circuit is also provided with a second current output terminal, and the second current input terminal is connected to the second optocoupler.

4. The detection system for the operating loop according to claim 2, characterized in that, The closing circuit detection circuit also includes: First resistor, second resistor, first transistor, and second transistor; One end of the first resistor is connected to the first current input terminal, and the other end is connected to one end of the first transistor and the first end of the first optocoupler, respectively; one end of the second resistor is connected to the other end of the first transistor and the second end of the first optocoupler, respectively, and the other end is connected to the first current output terminal through the second transistor.

5. The detection system for the operating circuit according to claim 4, characterized in that, The closing circuit detection circuit also includes: The third and fourth resistors; The first resistor is connected to the first end of the first optocoupler through the third resistor; one end of the fourth resistor is connected to the third resistor, and the other end is connected to the second resistor.

6. The detection system for the operating circuit according to claim 5, characterized in that, The closing circuit detection circuit also includes: First capacitor and second capacitor; One end of the first capacitor is connected to the third resistor, and the other end is connected to the second resistor; one end of the second capacitor is connected to the third end of the first optocoupler, and the other end is connected to the fourth end of the first optocoupler.

7. The detection system for the operating circuit according to claim 3, characterized in that, The tripping circuit detection circuit also includes: The fifth resistor, the sixth resistor, the third transistor, and the fourth transistor; One end of the fifth resistor is connected to the second current input terminal, and the other end is connected to one end of the third transistor and the first end of the second optocoupler, respectively; one end of the sixth resistor is connected to the other end of the third transistor and the second end of the second optocoupler, respectively, and the other end is connected to the second current output terminal through the fourth transistor.

8. The detection system for the operating circuit according to claim 7, characterized in that, The tripping circuit detection circuit also includes: The seventh and eighth resistors; The fifth resistor is connected to the first end of the second optocoupler through the seventh resistor; one end of the eighth resistor is connected to the seventh resistor, and the other end is connected to the sixth resistor.

9. The detection system for the operating circuit according to claim 8, characterized in that, The tripping circuit detection circuit also includes: The third and fourth capacitors; One end of the third capacitor is connected to the seventh resistor, and the other end is connected to the sixth resistor; one end of the fourth capacitor is connected to the third end of the second optocoupler, and the other end is connected to the fourth end of the second optocoupler.

10. The detection system for the operating circuit according to claim 1, characterized in that, The third ends of the first and second optical couplers are connected to ground, the fourth end of the first optical coupler is connected to the first signal output terminal, and the fourth end of the second optical coupler is connected to the second signal output terminal.

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