Electric leakage and flow anomaly detection instrument for electric power system

Abstract

The invention belongs to the field of electric leakage detection, and particularly relates to an electric power system electric leakage and flow anomaly detection instrument which comprises a power supply, the output end of the power supply is electrically connected with an anode main line, the tail end of the anode main line is electrically connected with a circuit breaker, and the output end of the circuit breaker is electrically connected with an electric appliance device through an anode auxiliary line. The anode main line and the cathode main line are arranged to penetrate through the interior of the first winding magnetic block, in the normal working process of the circuit, due to the fact that currents attached to the anode main line and the cathode main line are equal in magnitude and opposite in reverse direction, electromagnetic fields generated by the currents to winding coils are offset mutually, and if the circuit leaks electricity, the current can be recovered. When the current of the anode main line is not equal to that of the cathode main line, the current of the anode main line and the current of the cathode main line are not equal, the current appears in the winding coil due to the existence of the electromagnetic field, the circuit breaker cuts off the protection circuit at the moment, the current is transmitted to the first alarm and the first warning lamp, and an alarm signal is sent out.

Description

Technical Field

[0001] The invention belongs to the field of leakage detection, and in particular relates to an instrument for detecting leakage and abnormal flow in a power system. Background Art

[0002] Power system leakage

[0003] Definition: Leakage refers to the flow of current from a normal conductor (such as a cable or wire) to the ground or other parts that should not be conductive. This phenomenon usually indicates that there are defects in the insulation material and may cause safety hazards.

[0004] Detection method:

[0005] 1. Residual Current Device (RCD): It can automatically detect leakage current and cut off the circuit. It is an important device to protect personnel safety.

[0006] 2. Insulation resistance tester: measures the insulation resistance value of cables and equipment and evaluates the condition of insulation materials;

[0007] 3. Leakage detector: A special instrument can accurately measure leakage current and help locate the leakage point;

[0008] 4. Infrared thermal imaging: used to detect temperature anomalies in power equipment and lines, thereby discovering possible leakage areas.

[0009] Treatment method:

[0010] 1. Repair insulation materials: Replace or repair damaged insulation materials to ensure insulation performance;

[0011] 2. Maintain equipment: Regularly inspect and maintain electrical equipment to avoid equipment failure;

[0012] 3. Install leakage protector: Install leakage protector in the circuit to prevent safety hazards caused by leakage;

[0013] 4. Maintain a dry environment: Ensure that the environment of electrical equipment and lines is dry to avoid moisture causing leakage.

[0014] Abnormal flow in the power system

[0015] Definition: In power systems, flow usually refers to the flow of current, and abnormal flow can refer to current values ​​outside the normal range, which may be caused by load imbalance, equipment failure, or system design problems.

[0016] Detection method:

[0017] 1. Ammeter and current sensor: used to monitor the current value in real time and detect whether there is abnormal fluctuation;

[0018] 2. Data logger: records long-term data of current to help analyze abnormal trends;

[0019] 3. Power analyzer: used to measure current and voltage, analyze power factor and current waveform, and identify abnormal loads;

[0020] 4. Smart meter: It can provide detailed electricity consumption data and flow analysis to help detect abnormal situations.

[0021] Treatment method:

[0022] 1. Check load balance: ensure that the load in the system is balanced to avoid abnormal traffic caused by load imbalance;

[0023] 2. Equipment maintenance: Regularly check the operating status of power equipment and repair faults;

[0024] 3. System optimization: Optimize the design and adjust the power system to reduce flow anomalies;

[0025] Adjust the load: Adjust the load according to actual needs to avoid overload operation.

[0026] The existing publication number CN220671503U discloses a leakage and flow abnormality detection device for a power system, including an electric power meter with leakage detection and cable current carrying capacity detection functions and a power cable connected to the power equipment, wherein the power cable includes a cable core, an insulating protective sleeve is fixedly connected to the outer surface of the cable core, and the insulating protective sleeve is provided with two exposed openings exposing the cable core.

[0027] The existing power system leakage and flow anomaly detection instruments still have the following shortcomings:

[0028] 1. When facing leakage in the power system, the existing detection instruments only cut off the power to the circuit system by setting up a leakage protection device, but no warning is given, which will result in the maintenance personnel being unable to obtain feedback on circuit abnormalities in a timely manner.

[0029] 2. Existing detection instruments cannot effectively feedback information about abnormal current when faced with abnormal flow in the power system.

[0030] 3. The abnormal current will cause the cable to be overloaded, which may cause the heat of the current to melt the cable, and the existing device cannot achieve timely power-off processing. Summary of the invention

[0031] The purpose of the present invention is to address the problem raised in the above-mentioned background technology that when facing a leakage in the power system, the circuit system is only powered off by setting up a leakage protection device, but no warning is given, which will result in the maintenance personnel being unable to obtain feedback on the circuit abnormality in time. When facing abnormal flow in the power system, the information on current abnormality cannot be effectively fed back. The occurrence of current abnormality will cause excessive load on the cable, which may easily cause the heat of the current to melt the cable, and the existing devices cannot achieve timely power-off processing. An instrument for detecting leakage and abnormal flow in the power system is provided.

[0032] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an electric power system leakage and flow anomaly detection instrument, comprising a power supply, the output end of the power supply is electrically connected to an anode main line, the end of the anode main line is electrically connected to a circuit breaker, the output end of the circuit breaker is electrically connected to an electrical device through an anode auxiliary line, the output end of the electrical device is electrically connected to the circuit breaker through a cathode auxiliary line, the output end of the circuit breaker is electrically connected to the input end of the power supply through a cathode main line, and an electric power system leakage detection structure and an electric power system flow anomaly detection component are arranged on the outside of the anode main line and the cathode main line.

[0033] Furthermore, the power system leakage detection structure includes a No. 1 winding magnetic block, the anode main line and the cathode main line both pass through the center of the No. 1 winding magnetic block, and the end of the winding coil of the No. 1 winding magnetic block is electrically connected to a No. 1 lead wire.

[0034] Furthermore, the end of the No. 1 lead is electrically connected to the No. 1 controller, the output end of the No. 1 controller is electrically connected to the No. 1 cable, the end of the No. 1 cable is electrically connected to the No. 1 alarm, the upper surface of the No. 1 alarm is fixedly connected to the No. 1 warning light, and the No. 1 warning light is electrically connected to the No. 1 alarm.

[0035] Furthermore, the flow anomaly detection component includes a first-order drainage structure, a second-order drainage structure, an alarm structure and a power-off protection structure, the first-order drainage structure includes a three-way connecting pipe, two pairs of the three-way connecting pipes are electrically connected to the two ends of the anode main line and the cathode main line, an anode line No. 1 is electrically connected between the two three-way connecting pipes on the anode main line, and a cathode line No. 1 is electrically connected between the two three-way connecting pipes on the cathode main line.

[0036] Furthermore, the second-order drainage structure includes a second anode wire, the second anode wire is electrically connected to the output end of the power supply, the end of the second anode wire is electrically connected to a load resistor, the output end of the load resistor is electrically connected to a second cathode wire, and the end of the second cathode wire is electrically connected to the input end of the power supply.

[0037] Furthermore, the alarm structure includes a No. 2 winding magnetic block, and the No. 1 cathode wire and the No. 2 anode wire both pass through the No. 2 winding magnetic block.

[0038] Furthermore, the output end of the No. 2 winding magnetic block is electrically connected to a No. 2 lead, the end of the No. 2 lead is electrically connected to a No. 2 controller, the output end of the No. 2 controller is electrically connected to a No. 2 cable, the end of the No. 2 cable is electrically connected to a No. 2 alarm, a No. 2 warning light is fixedly connected to the upper surface of the No. 2 alarm, and the No. 2 warning light is electrically connected to the No. 2 alarm.

[0039] Furthermore, the power-off protection structure includes a control cable, the control cable is electrically connected to an output end on the upper surface of the second controller, and an end of the control cable is electrically connected to an input end on the side of the circuit breaker.

[0040] Compared with the existing technology, the advantages of this power system leakage and flow anomaly detection instrument are:

[0041] 1. The present invention sets an anode main line and a cathode main line to pass through the interior of the No. 1 winding magnetic block. During the normal operation of the circuit, since the currents attached to the anode main line and the cathode main line are equal in magnitude and opposite in direction, the electromagnetic fields generated by the currents on the winding coils cancel each other out. If leakage occurs in the line, the currents attached to the anode main line and the cathode main line are unequal in magnitude. Due to the existence of the electromagnetic field, current will appear in the winding coil. At this time, the circuit breaker will disconnect the protection circuit, and the current will also be transmitted to the No. 1 alarm and the No. 1 warning light, thereby issuing an alarm signal.

[0042] 2. The present invention sets a first-order drainage structure, the function of which is to divert a part of the current in the main circuit as the object of detection. The second-order drainage structure and the load resistor are set to obtain a standard current in a normal circuit, and then use this as a reference standard for the current size. By passing the No. 1 cathode wire and the No. 2 anode wire through the No. 2 winding magnetic block, the circuit is detected using the principle of electromagnetic effect. If there is no abnormality in the current, the circuit will operate normally. If the circuit has an abnormal flow, current will also be generated in the winding coil in the No. 2 winding magnetic block. When current is also generated in the winding coil in the No. 2 winding magnetic block, the No. 2 warning light and the No. 2 alarm will both generate alarm signals.

[0043] 3. The present invention provides a power-off protection structure. When current is generated in the winding coil in the second winding magnetic block, the current can be transmitted to the circuit breaker through the control cable, and the circuit breaker will be disconnected in time to protect the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1It is a structural schematic diagram of an electric power system leakage and flow anomaly detection instrument provided by the present invention;

[0045] Figure 2 yes Figure 1 A magnified view of part A;

[0046] Figure 3 yes Figure 1 A magnified view of part B;

[0047] Figure 4 yes Figure 1 Enlarged view of part C;

[0048] Figure 5 It is a schematic diagram of the flow anomaly detection structure of a power system leakage and flow anomaly detection instrument provided by the present invention;

[0049] Figure 6 The present invention provides a schematic diagram of the leakage structure of an electric power system of an electric power system leakage and flow anomaly detection instrument.

[0050] In the figure, 1 is a power supply, 2 is an anode main line, 3 is a cathode main line, 4 is a circuit breaker, 5 is an electrical device, 6 is a No. 1 winding magnetic block, 7 is a No. 1 lead line, 8 is a No. 1 controller, 9 is a No. 1 cable, 10 is a No. 1 alarm, 11 is a No. 1 warning light, 12 is a three-way connecting pipe, 13 is a No. 1 anode line, 14 is a No. 1 cathode line, 15 is a No. 2 anode line, 16 is a No. 2 cathode line, 17 is a No. 2 winding magnetic block, 18 is a No. 2 lead line, 19 is a No. 2 controller, 20 is a No. 2 cable, 21 is a No. 2 alarm, 22 is a No. 2 warning light, 23 is a control cable, and 24 is a load resistor. DETAILED DESCRIPTION

[0051] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0052] like Figure 1-Figure 6 As shown, an electric power system leakage and flow anomaly detection instrument comprises a power supply 1, the output end of the power supply 1 is electrically connected to an anode main line 2, the end of the anode main line 2 is electrically connected to a circuit breaker 4, the output end of the circuit breaker 4 is electrically connected to an electrical device through an anode auxiliary line, the output end of the electrical device 5 is electrically connected to the circuit breaker 4 through a cathode auxiliary line, the output end of the circuit breaker 4 is electrically connected to the input end of the power supply 1 through a cathode main line 3, and an electric power system leakage detection structure and an electric power system flow anomaly detection component are arranged outside the anode main line 2 and the cathode main line 3. By adding the circuit breaker 4 between the power supply 1 and the electrical device 5, when an abnormal condition occurs in the circuit, the power can be cut off in time, thereby protecting the main line;

[0053] The electric power system leakage detection structure includes a No. 1 winding magnetic block 6, the anode main line 2 and the cathode main line 3 both pass through the center of the No. 1 winding magnetic block 6, and the end of the winding coil of the No. 1 winding magnetic block 6 is electrically connected to the No. 1 lead 7;

[0054] The end of the No. 1 lead wire 7 is electrically connected to the No. 1 controller 8, the output end of the No. 1 controller 8 is electrically connected to the No. 1 cable 9, the end of the No. 1 cable 9 is electrically connected to the No. 1 alarm 10, the upper surface of the No. 1 alarm 10 is fixedly connected to the No. 1 warning light 11, the No. 1 warning light 11 is electrically connected to the No. 1 alarm 10, by setting the anode main line 2 and the cathode main line 3 to pass through the No. 1 winding magnetic block 6, during the normal operation of the circuit, because the currents attached to the anode main line 2 and the cathode main line 3 are equal in magnitude and opposite in direction, the electromagnetic fields generated by the currents on the winding coils cancel each other out, if leakage occurs in the line, the currents attached to the anode main line 2 and the cathode main line 3 are not equal in magnitude, and due to the existence of the electromagnetic field, current will appear in the winding coils, at this time the circuit breaker 4 will disconnect the protection circuit, and the current will also be transmitted to the No. 1 alarm 10 and the No. 1 warning light 11, thereby sending out an alarm signal;

[0055] The flow anomaly detection component includes a first-order drainage structure, a second-order drainage structure, an alarm structure and a power-off protection structure. The first-order drainage structure includes a three-way connecting pipe 12. Two pairs of three-way connecting pipes 12 are electrically connected to the two ends of the anode main line 2 and the cathode main line 3, respectively. A first anode line 13 is electrically connected between the two three-way connecting pipes 12 on the anode main line 2, and a first cathode line 14 is electrically connected between the two three-way connecting pipes 12 on the cathode main line 3. The function of the first-order drainage structure is to separate a part of the current in the main line as the object of detection;

[0056] The second-order current drainage structure includes a second anode line 15, the second anode line 15 is electrically connected to the output end of the power supply 1, the end of the second anode line 15 is electrically connected to the load resistor 24, the output end of the load resistor 24 is electrically connected to the second cathode line 16, and the end of the second cathode line 16 is electrically connected to the input end of the power supply. By setting the second-order current drainage structure and the load resistor, a standard current in a normal circuit is obtained, which is then used as a reference standard for the current size;

[0057] The alarm structure includes a No. 2 winding magnetic block 17, and the No. 1 cathode wire 14 and the No. 2 anode wire 15 are both passed through the No. 2 winding magnetic block 17. By passing the No. 1 cathode wire 14 and the No. 2 anode wire 15 through the No. 2 winding magnetic block 17, the circuit is detected by using the principle of electromagnetic effect. If there is no abnormality in the current, the circuit will operate normally. If the circuit has an abnormal flow, current will also be generated in the winding coil in the No. 2 winding magnetic block 17;

[0058] The output end of the No. 2 winding magnetic block 17 is electrically connected to the No. 2 lead wire 18, the end of the No. 2 lead wire 18 is electrically connected to the No. 2 controller 19, the output end of the No. 2 controller 19 is electrically connected to the No. 2 cable 20, the end of the No. 2 cable 20 is electrically connected to the No. 2 alarm 21, the upper surface of the No. 2 alarm 21 is fixedly connected to the No. 2 warning light 22, the No. 2 warning light 22 is electrically connected to the No. 2 alarm 21, when current is also generated in the winding coil of the No. 2 winding magnetic block 17, the No. 2 warning light 22 and the No. 2 alarm 21 will both generate alarm signals;

[0059] The power-off protection structure includes a control cable 23, which is electrically connected to the output end of the upper surface of the No. 2 controller 19, and the end of the control cable 23 is electrically connected to the input end on the side of the circuit breaker 4. When current is generated in the winding coil in the No. 2 winding magnetic block 17, the current can be transmitted to the circuit breaker 4 through the control cable 23, and the circuit breaker 4 will be disconnected in time to protect the circuit.

[0060] The working principle of the present invention is as follows:

[0061] By adding a circuit breaker 4 between the power source 1 and the electrical device 5, when an abnormal situation occurs in the circuit, the power can be cut off in time, thereby protecting the main line;

[0062] By setting the anode main line 2 and the cathode main line 3 to pass through the first winding magnetic block 6, during the normal operation of the circuit, since the currents attached to the anode main line 2 and the cathode main line 3 are equal in magnitude and opposite in direction, the electromagnetic fields generated by the currents on the winding coils cancel each other out. If leakage occurs in the line, the currents attached to the anode main line 2 and the cathode main line 3 are unequal in magnitude. Due to the existence of the electromagnetic field, current will appear in the winding coils. At this time, the circuit breaker 4 will disconnect the protection circuit, and the current will also be transmitted to the first alarm 10 and the first warning light 11, thereby issuing an alarm signal;

[0063] By setting a first-order drainage structure, the function of the first-order drainage structure is to divert a part of the current in the main circuit to be used as the object of detection. By setting a second-order drainage structure and a load resistor, it is to obtain a standard current in a normal circuit, and then use it as a reference standard for the current size. By passing the No. 1 cathode wire 14 and the No. 2 anode wire 15 through the No. 2 winding magnetic block 17, the circuit is detected using the principle of electromagnetic effect. If there is no abnormality in the current, the circuit will operate normally. If the circuit has an abnormal flow, current will also be generated in the winding coil in the No. 2 winding magnetic block 17. When current is also generated in the winding coil in the No. 2 winding magnetic block 17, the No. 2 warning light 22 and the No. 2 alarm 21 will both generate alarm signals;

[0064] By setting up a power-off protection structure, when current is generated in the winding coil in the second winding magnetic block 17, the current can be transmitted to the circuit breaker 4 through the control cable 23, and the circuit breaker 4 will be disconnected in time to protect the circuit.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric power system leakage and flow anomaly detection instrument, characterized in that: The invention comprises a power supply (1), wherein the output end of the power supply (1) is electrically connected to an anode main line (2), the end of the anode main line (2) is electrically connected to a circuit breaker (4), the output end of the circuit breaker (4) is electrically connected to an electrical device via an anode auxiliary line, the output end of the electrical device (5) is electrically connected to the circuit breaker (4) via a cathode auxiliary line, the output end of the circuit breaker (4) is electrically connected to the input end of the power supply (1) via a cathode main line (3), and a power system leakage detection structure and a power system flow abnormality detection component are arranged outside the anode main line (2) and the cathode main line (3).

2. The power system leakage and flow anomaly detection instrument according to claim 1, characterized in that: The electric power system leakage detection structure comprises a No. 1 winding magnetic block (6), the anode main line (2) and the cathode main line (3) both pass through the center of the No. 1 winding magnetic block (6), and the winding coil end of the No. 1 winding magnetic block (6) is electrically connected to a No. 1 lead wire (7).

3. The power system leakage and flow anomaly detection instrument according to claim 2, characterized in that: The end of the No. 1 lead wire (7) is electrically connected to the No. 1 controller (8), the output end of the No. 1 controller (8) is electrically connected to the No. 1 cable (9), the end of the No. 1 cable (9) is electrically connected to the No. 1 alarm (10), the upper surface of the No. 1 alarm (10) is fixedly connected to the No. 1 warning light (11), and the No. 1 warning light (11) is electrically connected to the No. 1 alarm (10).

4. The power system leakage and flow anomaly detection instrument according to claim 1, characterized in that: The flow anomaly detection component comprises a first-order drainage structure, a second-order drainage structure, an alarm structure and a power-off protection structure. The first-order drainage structure comprises a three-way connecting pipe (12). Two pairs of the three-way connecting pipes (12) are electrically connected to the two ends of the anode main line (2) and the cathode main line (3), respectively. A first anode line (13) is electrically connected between the two three-way connecting pipes (12) on the anode main line (2), and a first cathode line (14) is electrically connected between the two three-way connecting pipes (12) on the cathode main line (3).

5. The power system leakage and flow anomaly detection instrument according to claim 4, characterized in that: The second-order drainage structure comprises a second anode wire (15), the second anode wire (15) is electrically connected to the output end of the power supply (1), the end of the second anode wire (15) is electrically connected to a load resistor (24), the output end of the load resistor (24) is electrically connected to a second cathode wire (16), and the end of the second cathode wire (16) is electrically connected to the input end of the power supply.

6. The power system leakage and flow anomaly detection instrument according to claim 5, characterized in that: The alarm structure comprises a No. 2 winding magnetic block (17), and the No. 1 cathode wire (14) and the No. 2 anode wire (15) both pass through the No. 2 winding magnetic block (17).

7. The power system leakage and flow anomaly detection instrument according to claim 6, characterized in that: The output end of the No. 2 winding magnetic block (17) is electrically connected to a No. 2 lead wire (18), the end of the No. 2 lead wire (18) is electrically connected to a No. 2 controller (19), the output end of the No. 2 controller (19) is electrically connected to a No. 2 cable (20), the end of the No. 2 cable (20) is electrically connected to a No. 2 alarm (21), the upper surface of the No. 2 alarm (21) is fixedly connected to a No. 2 warning light (22), and the No. 2 warning light (22) is electrically connected to the No. 2 alarm (21).

8. The power system leakage and flow anomaly detection instrument according to claim 7, characterized in that: The power-off protection structure comprises a control cable (23), wherein the control cable (23) is electrically connected to an output end on the upper surface of the second controller (19), and an end of the control cable (23) is electrically connected to an input end on the side of the circuit breaker (4).

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