Distribution network line state monitoring insulator

Abstract

The invention discloses a distribution network line state monitoring insulator, which comprises an insulator body, a line protection unit, an online energy taking unit, a voltage measurement unit and a current measurement unit, the system has the advantages that the system can analyze and monitor a line fault and a fault reason or disconnect the line to protect a rear-end circuit when an overcurrent fault occurs, and the online monitoring insulator can also monitor the power utilization condition of the rear-end circuit and power utilization equipment; the power utilization rule of the district can be analyzed through data of the power utilization condition of the rear end, and power grid pollution and the like can be analyzed through power utilization equipment; through the distribution of distribution network line insulators in the line, on-site fault types and fault areas are known at the first time, the fault range is controlled, and a main line is protected. Therefore, the line state can be intuitively monitored, and the manual troubleshooting time is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of line online monitoring, and in particular to an insulator for monitoring the state of a distribution network line. Background Art

[0002] With the progress of the times, the power grid has developed rapidly and is spread across every region. Due to its large size, differences in environment and electricity consumption in large factories, the power grid may experience a variety of faults. Faults will cause power outages in the entire area, and the power outage will last for a long time, which will cause dissatisfaction among users and lead to complaints. In order to provide more accurate fault information and avoid or reduce economic losses during power outages and operation and maintenance, distribution network equipment such as fault indicators and pole switches are now used. However, pole switches are large in size, difficult to construct and have high costs, which have been criticized. Fault indicators provide less fault information and cannot protect back-end lines. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a distribution network line status monitoring insulator, which can provide line information, including fault analysis information, etc. and produce an obvious disconnection point when overcurrent occurs.

[0004] In order to solve the above technical problems, the technical solution of the present invention is:

[0005] A distribution network line status monitoring insulator, comprising an insulator body, and also comprising: a line protection unit, an online energy acquisition unit, a voltage measurement unit, and a current measurement unit;

[0006] The line protection unit is connected to the outside of the insulator body;

[0007] The online energy acquisition unit is connected in series through a high-voltage capacitor and a first high-voltage resistor, and the two ends are respectively connected to the wire used to electrically connect the distribution line inlet terminal and the distribution line outlet terminal, and the terminal A inside the junction box; the terminal A is connected to the transformer that provides energy;

[0008] The voltage measurement unit is connected to the metal connector and the lower-level wiring terminals of the next-level distribution network line through the first high-voltage high-precision capacitor and the second high-voltage high-precision capacitor, and the outgoing lines are connected to terminal B and terminal D respectively. Finally, the first high-precision capacitor and the second high-precision capacitor are connected externally respectively. The voltage across the first high-precision capacitor and the second high-precision capacitor can be measured to obtain the voltage information of the incoming and outgoing terminals.

[0009] The current measuring unit leads the current signal to the terminal C inside the junction box through the Rogowski coil sleeved on the outside of the metal connector and performs self-integration through the second high-precision resistor.

[0010] Furthermore, the line protection unit adopts a drop-out type fuse. When the line has an overcurrent fault, the internal circuit of the drop-out fuse melts to form an obvious breakpoint.

[0011] Furthermore, the insulator body is a column structure, and an umbrella skirt structure is provided on the outside to provide insulation and isolation for the line.

[0012] Furthermore, the power distribution line incoming terminal and the power distribution line outgoing terminal are electrically connected via a metal connector and are configured in an "L" shape.

[0013] Furthermore, the power distribution line incoming terminal is connected to the upper end of the line protection unit; and the lower end of the line protection unit is connected to the lower-level wiring terminal.

[0014] Furthermore, a terminal box is provided below the insulator body, and the terminal box leads out signal terminals A, B, C, and D; the terminal box can lead out voltage signals, current signals, and electric energy usage terminals.

[0015] Furthermore, it also includes a signal processing and communication unit; the signal processing and communication unit includes a power module for providing energy, a voltage processing module, a calculation and analysis module, a current processing module and a wired and wireless transmission module; the power module is electrically connected to the voltage processing module, the calculation and analysis module, and the current processing module; the calculation and analysis module is digitally connected to the voltage processing module and the current processing module respectively; the calculation and analysis module is digitally connected to the wired and wireless transmission module.

[0016] Furthermore, the power supply module transforms and performs decoupling filtering on the energy obtained by the online energy acquisition unit, converts the electrical energy into pure required electrical energy, and provides stable energy to each module; the voltage processing module obtains the voltage on the first high-precision capacitor and the second high-precision capacitor respectively through conversion, and provides them to the calculation and analysis module for matching with the voltage on the actual line to obtain voltage information; the current processing module collects and processes the voltage across the second high-precision resistor, and provides it to the calculation and analysis module for matching with the current on the actual line to obtain current information; the signal processing and communication unit can send the line information through the wired and wireless transmission module.

[0017] Beneficial effects of the present invention:

[0018] (1) The present invention can analyze and monitor line faults and the causes of faults, or disconnect the line protection back-end circuit in the event of an overcurrent fault. The online monitoring of insulators can also monitor the power consumption of the back-end lines and power-consuming equipment. The power consumption patterns of the area can be analyzed by data analysis of the back-end power consumption, and the power grid pollution can be analyzed by power-consuming equipment.

[0019] (2) Through the distribution of insulators in the distribution network line, the type of fault and fault area on site can be understood immediately, and the fault range can be controlled to protect the trunk line. This can intuitively monitor the line status and greatly reduce the time for manual troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 is a cross-sectional view of the present invention;

[0022] Figure 3 A circuit diagram of the current, voltage and power taking unit of the present invention;

[0023] Figure 4 It is a framework diagram of the signal processing and communication unit of the present invention.

[0024] In the figure,

[0025] 1- insulator body, 2- line protection unit, 3- online energy acquisition unit, 4- voltage measurement unit, 5- current measurement unit;

[0026] 1a-incoming terminal of distribution line, 1b-outgoing terminal of distribution line, 1c-lower level terminal, 1d-umbrella structure, 1e-terminal box;

[0027] 31-high voltage capacitor, 32-first high voltage resistor;

[0028] 41-a first high-voltage high-precision capacitor, 42-a second high-voltage high-precision capacitor, 43-a first high-precision capacitor, 44-a second high-precision capacitor;

[0029] 51-second high precision resistor;

[0030] 61 - power supply module, 62 - voltage processing module, 63 - calculation and analysis module, 64 - current processing module, 65 - wired and wireless transmission module. DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] A distribution network line status monitoring insulator, referring to Figure 1-4As shown, it includes an insulator body 1, and also includes: a line protection unit 2, an online energy acquisition unit 3, a voltage measurement unit 4, and a current measurement unit 5; the line protection unit 2 is connected to the outside of the insulator body 1; the online energy acquisition unit 3 is connected in series through a high-voltage capacitor 31 and a first high-voltage resistor 32, and the two ends are respectively connected to the wire used to electrically connect the distribution line incoming terminal 1a and the distribution line outgoing terminal 1b, and the terminal A inside the junction box; the terminal A is connected to the transformer that provides energy; the voltage measurement unit 4 is connected to the metal connector and the lower-level wiring terminal 1c of the next-level distribution network line through the first high-voltage high-precision capacitor 41 and the second high-voltage high-precision capacitor 42, and the outgoing wires are respectively connected to the terminal B and the terminal D, and finally the first high-precision capacitor 43 and the second high-precision capacitor 44 are respectively connected to the outside, and the voltage at both ends of the first high-precision capacitor 43 and the second high-precision capacitor 44 can be measured to obtain voltage information. At the same time, copper foil induction can be used to replace the capacitor. The current measurement unit 5 can obtain current information by leading the current signal to the internal terminal C of the junction box through the Rogowski coil set on the outside of the metal connector and performing self-integration through the second high-precision resistor 51. The voltage information can be obtained by measuring the voltage across the first high-precision capacitor 43 and the second high-precision capacitor 44 .

[0033] Specifically, the line protection unit 2 adopts a drop-out fuse. If an overcurrent fault occurs in the line, the drop-out fuse will melt the line and form an obvious breakpoint to protect the subsequent line. At the same time, the line status monitoring insulator will send the collected fault information and location to the receiving end for timely notification at the first time, shortening the fault detection time and processing time.

[0034] Specifically, the insulator body 1 is a column structure, and an shed structure 1d is arranged on the outside thereof to provide insulation and isolation for the line. The shed structure 1d can provide insulation and isolation for the line.

[0035] Specifically, the power distribution line incoming terminal 1a and the power distribution line outgoing terminal 1b are electrically connected through a metal connector and are configured in an "L" shape, so that the internal structure is convenient for layout.

[0036] Specifically, the incoming terminal 1a of the distribution line is connected to the upper end of the line protection unit 2; it can be inserted into the buckle of the outgoing terminal of the distribution line to fix it, or the line protection unit can be pulled open with force to isolate and protect the circuit at the lower end. The lower end of the line protection unit 2 is connected to the lower-level wiring terminal 1c; the back is connected to the next-level distribution network line. If the line protection unit is closed, electricity can be introduced and transmitted to the next level.

[0037] Specifically, a terminal box 1e is provided below the insulator body 1, and the terminal box 1e leads out signal terminals A, B, C, and D; the terminal box 1e can lead out voltage signals, current signals, and electric energy usage terminals.

[0038] Specifically, it also includes a signal processing and communication unit 6; the signal processing and communication unit 6 includes a power module 61 for providing energy, a voltage processing module 62, a calculation and analysis module 63, a current processing module 64 and a wired and wireless transmission module 65; the power module 61 is electrically connected to the voltage processing module 62, the calculation and analysis module 63, and the current processing module 64; the calculation and analysis module 63 is electrically connected to the voltage processing module 62 and the current processing module 64 respectively; the calculation and analysis module 63 is electrically connected to the wired and wireless transmission module 65.

[0039] Specifically, the power module 61 transforms and decouples the energy obtained by the online energy acquisition unit 3, converts the electric energy into pure required electric energy, and provides stable energy to each module; the voltage processing module 62 obtains the voltage on the first high-precision capacitor 43 and the second high-precision capacitor 44 respectively, and provides them to the calculation and analysis module 63 for matching with the voltage on the actual line to obtain voltage information; the current processing module 64 collects and processes the voltage across the second high-precision resistor 51, and provides it to the calculation and analysis module 63 for matching with the current on the actual line to obtain current information; the signal processing and communication unit 6 can send the line information through the wired and wireless transmission module 65. Through the combined analysis of current and voltage information, the detailed situation of the back-end line can be understood, including fault conditions, power consumption conditions, and pollution of power-consuming equipment.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A distribution network line status monitoring insulator, comprising an insulator body (1), characterized in that: Also includes: Line protection unit (2), online energy acquisition unit (3), voltage measurement unit (4), current measurement unit (5); The line protection unit (2) is connected to the outside of the insulator body (1); The online energy acquisition unit (3) is connected in series via a high-voltage capacitor (31) and a first high-voltage resistor (32), and its two ends are respectively connected to a wire for electrically connecting a distribution line incoming terminal (1a) and a distribution line outgoing terminal (1b), and a terminal A inside a junction box; the terminal A is connected to a transformer that provides energy; The voltage measurement unit (4) is connected to the metal connector and the lower-level wiring terminal (1c) of the next-level distribution network line through the first high-voltage high-precision capacitor (41) and the second high-voltage high-precision capacitor (42), and the outgoing lines are connected to the terminal B and the terminal D respectively. Finally, the first high-precision capacitor (43) and the second high-precision capacitor (44) are externally connected respectively. By measuring the voltage across the first high-precision capacitor (43) and the second high-precision capacitor (44), the voltage information of the incoming line and the outgoing line can be obtained. The current measuring unit (5) leads the current signal to the terminal C inside the junction box through a Rogowski coil sleeved outside the metal connector and performs self-integration through a second high-precision resistor (51).

2. The distribution network line status monitoring insulator according to claim 1, characterized in that: The line protection unit (2) adopts a drop-out type fuse. When the line has an overcurrent fault, the internal line of the drop-out fuse fuses and forms an obvious breakpoint.

3. The distribution network line status monitoring insulator according to claim 1, characterized in that: The insulator body (1) is a columnar structure, and an umbrella skirt structure (1d) is provided on the outside thereof for providing insulation and isolation for the line.

4. The distribution network line status monitoring insulator according to claim 1, characterized in that: The power distribution line inlet terminal (1a) and the power distribution line outlet terminal (1b) are electrically connected via a metal connector and are configured in an "L" shape.

5. The distribution network line status monitoring insulator according to claim 1, characterized in that: The power distribution line incoming terminal (1a) is connected to the upper end of the line protection unit (2); and the lower end of the line protection unit (2) is connected to the lower-level wiring terminal (1c).

6. The distribution network line status monitoring insulator according to claim 1, characterized in that: A terminal box (1e) is provided below the insulator body (1), and the terminal box (1e) leads out signal terminals A, B, C, and D; the terminal box (1e) can lead out voltage signals, current signals, and electric energy usage terminals.

7. The distribution network line status monitoring insulator according to claim 1, characterized in that: It also includes a signal processing and communication unit (6); the signal processing and communication unit (6) includes a power module (61) for providing energy, a voltage processing module (62), a calculation and analysis module (63), a current processing module (64) and a wired and wireless transmission module (65); the power module (61) is electrically connected to the voltage processing module (62), the calculation and analysis module (63) and the current processing module (64); the calculation and analysis module (63) is digitally connected to the voltage processing module (62) and the current processing module (64) respectively; the calculation and analysis module (63) is digitally connected to the wired and wireless transmission module (65).

8. The distribution network line status monitoring insulator according to claim 7, characterized in that: The power supply module (61) transforms and performs decoupling filtering on the energy obtained by the online energy acquisition unit (3), converts the electrical energy into pure required electrical energy, and provides stable energy to each module; the voltage processing module (62) respectively obtains the voltage on the first high-precision capacitor (43) and the second high-precision capacitor (44), and provides them to the calculation and analysis module (63) for matching with the voltage on the actual line to obtain voltage information; the current processing module (64) collects and processes the voltage across the second high-precision resistor (51), and provides them to the calculation and analysis module (63) for matching with the current on the actual line to obtain current information; the signal processing and communication unit (6) can send the line information through the wired and wireless transmission module (65).

Images