Overhead conductor arc hammer and conductor current monitoring system

Abstract

The utility model provides an overhead conductor arc hammer and conductor current monitoring system. The overhead conductor arc hammer and conductor current monitoring system comprises a laser distance measuring sensor, a processing unit, an induction coil, a rectifying unit, a current sampling unit and a voltage stabilizing unit, the laser distance measuring sensor is arranged at the lowest point of an arc hammer of the overhead conductor and used for measuring the distance between the arc hammer of the overhead conductor and the ground, the output end of the laser sensor is connected to the processing unit, and the induction coil is arranged on the overhead conductor and used for generating induction current based on an electromagnetic field of the overhead conductor. The output end of the induction coil is connected to the input end of the rectifying unit, the output end of the rectifying unit is connected to the input end of the current sampling unit, the output end of the current sampling unit is connected to the input end of the processing unit, and the input end of the voltage stabilizing unit is connected to the output end of the rectifying unit. The output end of the voltage stabilizing unit supplies power to the current sampling unit and the processing unit.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of electric power monitoring systems, especially a kind of overhead conductor arc hammer and conductor current monitoring system. BACKGROUND

[0002] In power system, overhead conductor is a vital part, and its state parameters have significant influence on the stability and safety of the entire power system. However, the overhead conductor expands and shrinks due to current heat and environmental effects during operation, and the change of overhead conductor sag leads to too small distance between overhead conductor arc hammer and ground, thus safety hazards exist.

[0003] In the prior art, the field of overhead conductor sag measurement mainly relies on manual visual inspection and measuring rods, among which manual visual inspection depends on human vision and experience, and the measurement accuracy is limited. It needs to approach high-voltage power lines, which poses safety hazards, is limited by environmental factors, and data is not easy to save and analyze. Using measuring rods to measure sag requires manual adjustment and operation, which is easily affected by human factors, and its accuracy is poor due to limitations of terrain, line height and other conditions.

[0004] On the other hand, the current of overhead conductor is also one of the index characteristics of stable power operation, and the existing current detection has the problems of complex structure and difficult operation and maintenance.

[0005] Therefore, in order to solve the above technical problems, it is urgent to propose a new technical means. UTILITY MODEL CONTENT

[0006] Therefore, the utility model aims to provide an overhead conductor arc hammer and conductor current monitoring system, which can accurately monitor the distance between the overhead conductor arc hammer and the ground and the current of the overhead conductor and upload in real time, thereby effectively ensuring the measurement accuracy and the continuity and reliability of the monitoring data, providing accurate data support for subsequent operation and maintenance of the power system, and the entire system structure is relatively simple and easy to implement.

[0007] The utility model provides an overhead conductor arc hammer and conductor current monitoring system, which comprises a laser ranging sensor, a processing unit, an induction coil, a rectifier unit, a current sampling unit and a voltage stabilizing unit.

[0008] The laser ranging sensor is arranged at the lowest point of the arc hammer of the overhead conductor and is used to measure the distance between the arc hammer of the overhead conductor and the ground, the output end of the laser ranging sensor is connected to the processing unit, the induction coil is arranged on the overhead conductor and is used to generate an induced current based on the electromagnetic field of the overhead conductor, the output end of the induction coil is connected to the input end of the rectifier unit, the output end of the rectifier unit is connected to the input end of the current sampling unit, the output end of the current sampling unit is connected to the input end of the processing unit, the input end of the voltage stabilizing unit is connected to the output end of the rectifier unit, and the output end of the voltage stabilizing unit supplies power to the current sampling unit and the processing unit.

[0009] Further, the current sampling unit comprises a resistor R2, an operational amplifier U1, a resistor R9, a resistor R10, and a sampling chip.

[0010] One end of the resistor R2 serves as the input end of the current sampling unit, the other end of the resistor R2 is connected to the non-inverting terminal of the operational amplifier U1, the inverting terminal of the operational amplifier U1 is directly connected to the output end of the operational amplifier to form a voltage follower, the output end of the operational amplifier U1 is connected to the ground through the series connection of the resistor R9 and the resistor R10, the common connection point between the resistor R9 and the resistor R10 is connected to the sampling input end of the sampling chip, the output end of the sampling chip is connected to the processing unit, and the sampling chip is powered by the voltage stabilizing unit.

[0011] Further, the voltage stabilizing unit comprises a resistor R3, a resistor R4, a transistor T1, a transistor T2, a resistor R5, a resistor R6, an adjustable resistor R7, a resistor R8, a capacitor C2, and a voltage stabilizing tube DW2.

[0012] One end of the resistor R3 serves as the input end of the voltage stabilizing unit, the other end of the resistor R3 is connected to the collector of the transistor T1, the emitter of the transistor T1 is connected to the ground through the capacitor C2, the collector of the transistor T1 is connected to the base of the transistor T1 through the resistor R4, the base of the transistor T1 is connected to the collector of the transistor T2, the emitter of the transistor T2 is connected to the negative electrode of the voltage stabilizing tube DW2, the positive electrode of the voltage stabilizing tube DW2 is connected to the ground, the base of the transistor T2 is connected to the movable contact of the adjustable resistor R7, the first stationary contact of the adjustable resistor R7 is connected to the emitter of the transistor T1 through the resistor R6, the second stationary contact of the adjustable resistor R7 is connected to the ground through the resistor R8, the emitter of the transistor T1 is connected to the emitter of the transistor T2 through the resistor R5, and the common connection point between the capacitor C2 and the emitter of the transistor T1 serves as the output end of the voltage stabilizing unit.

[0013] Further, the processing unit comprises a processing chip, a wireless communication module, and a position module.

[0014] The input end of the processing chip is connected to the output end of the current sampling unit and the output end of the laser ranging sensor, the processing chip is in communication connection with a remote monitoring host through a wireless communication module, and the position module is in communication connection with the processing chip.

[0015] Further, the wireless communication module is a 2.4G power wireless private network module or a 5G module.

[0016] Further, the position module is a Beidou positioning module or a GPS positioning module.

[0017] Further, the rectifier unit comprises a rectifier circuit REC, a resistor R1, a capacitor C1 and a voltage stabilizing tube DW1.

[0018] The positive input end and the negative input end of the rectifier circuit REC are connected to the two ends of the induction coil, the negative output end of the rectifier circuit REC is grounded, the positive output end of the rectifier circuit REC is connected to one end of the resistor R1, the other end of the resistor R1 is grounded through the capacitor C1, the common connection point between the resistor R1 and the capacitor C1 serves as the output end of the rectifier unit, the common connection point between the resistor R1 and the capacitor C1 is connected to the negative electrode of the voltage stabilizing tube DW1, and the positive electrode of the voltage stabilizing tube DW1 is grounded.

[0019] Further, a surge protector GA is further included, and the surge protector GA is connected in parallel with the induction coil L1.

[0020] The utility model discloses a beneficial effect: through the utility model, can accurate monitoring and real -time upload the distance between the arc hammer of overhead conductor and ground and the current of overhead conductor simultaneously, thereby can effectively guarantee the measurement precision while guaranteeing the continuity, reliability of monitoring data, thereby provide accurate data support for subsequent power system operation and maintenance, and the whole system structure is relatively simple, facilitates implementation. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be further described in connection with the drawings and examples:

[0022] Figure 1 It is the principle diagram of the utility model.

[0023] Figure 2 It is the current sampling and voltage stabilizing circuit principle diagram of the utility model. CONCRETE IMPLEMENTATION

[0024] The utility model will be further described in connection with the drawings and examples:

[0025] The utility model discloses a kind of overhead conductor arc hammer and wire current monitoring system, including laser ranging sensor, processing unit, induction coil, rectifier unit, current sampling unit and voltage stabilizing unit;

[0026] The laser ranging sensor is arranged at the arc hammer lowest point of the overhead conductor and is used to measure the distance between the arc hammer of the overhead conductor and the ground, the output end of the laser ranging sensor is connected to the processing unit, the induction coil is arranged at the overhead conductor and is used to generate an induced current based on the electromagnetic field of the overhead conductor, the output end of the induction coil is connected to the input end of the rectifier unit, the output end of the rectifier unit is connected to the input end of the current sampling unit, the output end of the current sampling unit is connected to the input end of the processing unit, the input end of the voltage stabilizing unit is connected to the output end of the rectifier unit, and the output end of the voltage stabilizing unit supplies power to the current sampling unit and the processing unit. Wherein, when the laser ranging sensor measures, a corresponding target needs to be arranged on the ground, the laser signal emitted by the laser ranging sensor is reflected by the target, and the distance between the current arc hammer lowest point and the ground is calculated by the light speed and the time interval between the emitted laser and the received laser, through the above structure, the distance between the arc hammer of the overhead conductor and the ground and the current of the overhead conductor can be accurately monitored and uploaded in real time, so as to effectively ensure the measurement accuracy, ensure the continuity and reliability of the monitoring data, provide accurate data support for the subsequent operation and maintenance of the power system, and the whole system structure is relatively simple and convenient to implement, wherein the existing Rogowski coil can be used as the induction coil.

[0027] In the embodiment, the current sampling unit comprises a resistor R2, an operational amplifier U1, a resistor R9, a resistor R10, and a sampling chip.

[0028] One end of the resistor R2 serves as the input end of the current sampling unit, the other end of the resistor R2 is connected to the non-inverting terminal of the operational amplifier U1, the inverting terminal of the operational amplifier U1 is directly connected to the output terminal of the operational amplifier to form a voltage follower, the output terminal of the operational amplifier U1 is connected to the ground through the series connection of the resistor R9 and the resistor R10, the common connection point between the resistor R9 and the resistor R10 is connected to the sampling input end of the sampling chip, the output end of the sampling chip is connected to the processing unit, and the sampling chip is powered by the voltage stabilizing unit. The voltage follower has the function of isolation protection for the sampling chip by using its high impedance characteristic, and can ensure the accuracy of the sampling result. The sampling chip can be an existing chip, such as SC1281, SGM58601, etc., which can be selected according to actual needs.

[0029] In the embodiment, the voltage stabilizing unit comprises a resistor R3, a resistor R4, a triode T1, a triode T2, a resistor R5, a resistor R6, an adjustable resistor R7, a resistor R8, a capacitor C2, and a voltage stabilizing tube DW2.

[0030] One end of the resistor R3 is the input end of the voltage stabilizing unit, the other end of the resistor R3 is connected to the collector of the triode T1, the emitter of the triode T1 is grounded through the capacitor C2, the collector of the triode T1 is connected to the base of the triode T1 through the resistor R4, the base of the triode T1 is connected to the collector of the triode T2, the emitter of the triode T2 is connected to the negative electrode of the voltage stabilizing tube DW2, the positive electrode of the voltage stabilizing tube DW2 is grounded, the base of the triode T2 is connected to the moving contact of the adjustable resistor R7, the first static contact of the adjustable resistor R7 is connected to the emitter of the triode T1 through the resistor R6, the second static contact of the adjustable resistor R7 is grounded through the resistor R8, the emitter of the triode T1 is connected to the emitter of the triode T2 through the resistor R5, the common connection point between the capacitor C2 and the emitter of the triode T1 is the output end of the voltage stabilizing unit, through the above structure, the feedback is formed by the triode T2, the resistor R6, the adjustable resistor R7 and the adjustable resistor R8, thereby guaranteeing the final voltage stabilizing effect and providing guarantee for the power reliability of subsequent devices, and the inductive coil, the rectifying unit and the voltage stabilizing unit are adopted, without the need of additionally setting other power supplies, thereby ensuring the power supply reliability of the whole system.

[0031] In the embodiment, the processing unit comprises a processing chip, a wireless communication module and a position module.

[0032] The input end of the processing chip is connected to the output end of the current sampling unit and the output end of the laser ranging sensor, the processing chip is in communication connection with a remote monitoring host through the wireless communication module, and the position module is in communication connection with the processing chip, wherein the processing chip adopts an existing chip, such as an STM32 series chip.

[0033] The wireless communication module is a 2.4G power wireless private network module or a 5G module, which is beneficial to timely uploading monitoring information.

[0034] In the embodiment, the position module is a Beidou positioning module or a GPS positioning module, and through the structure, the geographical position of the current monitoring point is marked, thereby providing accurate data support for subsequent maintenance and inspection.

[0035] In the embodiment, the rectifying unit comprises a rectifying circuit REC, a resistor R1, a capacitor C1 and a voltage stabilizing tube DW1.

[0036] The positive input end and the negative input end of the rectifier circuit REC are connected with two ends of the induction coil respectively, the negative output end of the rectifier circuit REC is grounded, the positive output end of the rectifier circuit REC is connected with one end of the resistor R1, the other end of the resistor R1 is grounded through the capacitor C1, the common connection point between the resistor R1 and the capacitor C1 is used as the output end of the rectifier unit, the common connection point between the resistor R1 and the capacitor C1 is connected with the negative electrode of the voltage stabilizing tube DW1, and the positive electrode of the voltage stabilizing tube DW1 is grounded, wherein the rectifier circuit adopts a full-bridge rectifier circuit composed of existing diodes, and the capacitor C1 is used for filtering.

[0037] In the embodiment, a surge protector GA is further included, and the surge protector GA is connected with the induction coil L1 in parallel.

[0038] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and are not limited, although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the utility model, and all should be covered in the scope of the claims of the utility model.

Claims

1. An overhead conductor arc hammer and conductor current monitoring system characterized by: The application relates to an overhead line monitoring device, which comprises a laser ranging sensor, a processing unit, an induction coil, a rectifier unit, a current sampling unit and a voltage stabilizing unit. The laser ranging sensor is arranged at the lowest point of an arc hammer of an overhead line and is used for measuring the distance between the arc hammer of the overhead line and the ground, the output end of the laser ranging sensor is connected to the processing unit, the induction coil is arranged on the overhead line and is used for generating an induced current based on the electromagnetic field of the overhead line, the output end of the induction coil is connected to the input end of the rectifier unit, the output end of the rectifier unit is connected to the input end of the current sampling unit, the output end of the current sampling unit is connected to the input end of the processing unit, the input end of the voltage stabilizing unit is connected to the output end of the rectifier unit, and the output end of the voltage stabilizing unit supplies power to the current sampling unit, the laser ranging sensor and the processing unit.

2. The overhead conductor arc-hammer and conductor current monitoring system of claim 1, wherein: The current sampling unit comprises a resistor R2, an operational amplifier U1, a resistor R9, a resistor R10 and a sampling chip. One end of the resistor R2 is used as the input end of the current sampling unit, the other end of the resistor R2 is connected to the non-inverting terminal of the operational amplifier U1, the inverting terminal of the operational amplifier U1 is directly connected to the output end of the operational amplifier to form a voltage follower, the output end of the operational amplifier U1 is grounded through the series connection of the resistor R9 and the resistor R10, the common connection point between the resistor R9 and the resistor R10 is connected to the sampling input end of the sampling chip, the output end of the sampling chip is connected to the processing unit, and the sampling chip is powered by the voltage stabilizing unit.

3. The overhead conductor arc-hammer and conductor current monitoring system of claim 1, wherein: The voltage stabilizing unit comprises a resistor R3, a resistor R4, a triode T1, a triode T2, a resistor R5, a resistor R6, an adjustable resistor R7, a resistor R8, a capacitor C2 and a voltage stabilizing tube DW2. One end of the resistor R3 is used as the input end of the voltage stabilizing unit, the other end of the resistor R3 is connected to the collector of the triode T1, the emitter of the triode T1 is grounded through the capacitor C2, the collector of the triode T1 is connected to the base of the triode T1 through the resistor R4, the base of the triode T1 is connected to the collector of the triode T2, the emitter of the triode T2 is connected to the negative electrode of the voltage stabilizing tube DW2, the positive electrode of the voltage stabilizing tube DW2 is grounded, the base of the triode T2 is connected to the moving contact of the adjustable resistor R7, the first static contact of the adjustable resistor R7 is connected to the emitter of the triode T1 through the resistor R6, the second static contact of the adjustable resistor R7 is grounded through the resistor R8, the emitter of the triode T1 is connected to the emitter of the triode T2 through the resistor R5, and the common connection point between the capacitor C2 and the emitter of the triode T1 is used as the output end of the voltage stabilizing unit.

4. The overhead conductor arc-hammer and conductor current monitoring system of claim 1, wherein: The processing unit comprises a processing chip, a wireless communication module and a position module. The input end of the processing chip is connected to the output end of the current sampling unit and the output end of the laser ranging sensor, the processing chip is in communication connection with a remote monitoring host through the wireless communication module, and the position module is in communication connection with the processing chip.

5. The overhead conductor arc-hammer and conductor current monitoring system of claim 4, wherein: The wireless communication module is a 2.4G power wireless private network module or a 5G module.

6. The overhead conductor arc-hammer and conductor current monitoring system of claim 4, wherein: The position module is a Beidou positioning module or a GPS positioning module.

7. The overhead conductor arc-hammer and conductor current monitoring system of claim 1, wherein: The rectifier unit comprises a rectifier circuit REC, a resistor R1, a capacitor C1 and a voltage stabilizing tube DW1. The positive input end and the negative input end of the rectifier circuit REC are connected with two ends of the induction coil respectively, the negative output end of the rectifier circuit REC is grounded, the positive output end of the rectifier circuit REC is connected with one end of the resistor R1, the other end of the resistor R1 is grounded through the capacitor C1, the common connection point between the resistor R1 and the capacitor C1 serves as an output end of the rectification unit, the common connection point between the resistor R1 and the capacitor C1 is connected with the negative electrode of the stabilizing tube DW1, and the positive electrode of the stabilizing tube DW1 is grounded.

8. The overhead conductor arc-hammer and conductor current monitoring system of claim 1, wherein: A surge protector GA is further included, which is connected in parallel with the induction coil L1.

Images