Power distribution network fault positioning device

Abstract

The utility model discloses a power distribution network fault positioning device which comprises a device box, a voltage transformer, a current transformer, a master control device, a storage battery and a charging controller, and the voltage transformer, the current transformer, the master control device, the storage battery and the charging controller are fixedly connected in the device box. The voltage transformer and the current transformer are electrically connected with a power distribution network line, the charging controller is electrically connected with the storage battery, the charging controller is electrically connected with the power distribution network line, the voltage transformer and the current transformer are in signal connection with the main control device, and a wireless signal transmission module is further fixedly connected in the device box. The master control device is electrically connected with the wireless signal transmission module, and the wireless signal transmission module is in signal connection with a remote PC terminal. The utility model relates to the technical field of power distribution network fault positioning, and has the characteristic of being capable of efficiently positioning power distribution network faults.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of distribution network fault positioning, and specifically relates to a distribution network fault positioning device. BACKGROUND

[0002] With the rapid development of modern power systems, the scale and complexity of distribution networks are increasing, and fault detection and positioning have become an important link to ensure the stable operation of power systems. Faults in distribution networks can cause widespread power outages, affecting the normal supply of electricity and the normal operation of society. Therefore, how to quickly and accurately detect and locate fault points in distribution networks has become a key problem faced by power operation and maintenance personnel.

[0003] Traditional distribution network fault detection usually relies on manual inspection or simple current and voltage monitoring equipment. However, these methods are inefficient, especially in large-scale distribution networks, making it difficult to quickly and accurately identify fault locations. At the same time, traditional detection equipment has single functions and lacks remote monitoring capabilities, which cannot meet the needs of modern intelligent power grid remote operation and intelligent management. With the development of information technology and wireless communication technology, intelligent and remote fault positioning devices have gradually become an important direction for distribution network operation and maintenance. SUMMARY

[0004] In view of the above deficiencies in the prior art, the utility model aims to provide a distribution network fault positioning device capable of efficiently positioning distribution network faults.

[0005] The utility model employs the technical scheme that: a distribution network fault positioning device, including device box, voltage transformer, current transformer, main control device, battery and charging controller, the device box is fixedly connected with voltage transformer, current transformer, main control device, battery and charging controller in, voltage transformer and current transformer are connected with distribution network line electricity, charging controller is connected with battery electricity, charging controller is connected with the line electricity of distribution network, voltage transformer and current transformer are connected with main control device signal, the device box still is fixedly connected with wireless signal transmission module in, main control device is connected with wireless signal transmission module electricity, wireless signal transmission module signal connection has remote PC end.

[0006] In the above technical scheme, the master control device comprises a protective cover, a circuit board, a processor and a signal processing system, the device box is fixedly connected with the protective cover, the protective cover is fixedly connected with the circuit board, the processor and the signal processing system are installed on the circuit board, the processor is matched with a storage, the signal processing system is signal connected with the processor, the voltage transformer and the current transformer are signal connected with the signal processing system, and the processor is signal connected with the wireless signal transmission module.

[0007] In the above technical scheme, the signal processing system comprises an analog-to-digital converter, a digital signal processor and a signal amplifier which are connected in sequence.

[0008] In the above technical scheme, the device box is further provided with an access hole, a closing cover is hinged on one side of the access hole, an electromagnetic lock is fixedly connected on the closing cover, and the electromagnetic lock is electrically connected with the processor.

[0009] In the above technical scheme, a display is fixedly connected on the closing cover, and the display is signal connected with the processor.

[0010] In the above technical scheme, the device box is fixedly connected with a mounting rack.

[0011] The device has the advantages that:

[0012] 1. The voltage transformer, the current transformer, the master control device, the wireless signal transmission module, the storage battery and the charging controller are integrated in the device box, so that the device is compact in design and convenient to install and maintain.

[0013] 2. The voltage transformer and the current transformer are used for monitoring the operation state of the power distribution network in real time, the master control device processes the voltage and current signals through the signal processing system, and the processor quickly locates the fault point through an algorithm, so that the efficiency and accuracy of fault detection are improved.

[0014] 3. The wireless signal transmission module is used for transmitting the fault information to the remote PC end, so that remote monitoring is realized, the on-site maintenance demand is reduced, and the operation and maintenance cost is reduced.

[0015] 4. The storage battery and the charging controller are provided, so that the device can still normally operate under the condition of power failure and the like, and the fault detection function is ensured not to be interrupted.

[0016] 5. The device box is provided with the access hole and is provided with the electromagnetic lock and the display, so that the on-site viewing and maintenance of the operation and maintenance personnel are facilitated, and the convenience and safety of maintenance are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 Another view of the structure of the present application is shown in the schematic diagram.

[0019] Figure 3 The connection structure of the main control device in the present application is shown in the schematic diagram.

[0020] In the figure: 100 device box, 101 mounting bracket, 102 closed cover, 103 solenoid valve, 104 display, 200 voltage transformer, 300 current transformer, 400 battery, 500 charge controller, 600 main control device, 601 protective cover, 602 circuit board, 700 remote PC end. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Please refer to Figure 1 -3, a power distribution network fault positioning device, comprising a device box 100 and a voltage transformer 200, a current transformer 300, a main control device 600, a battery 400 and a charge controller 500 fixedly connected inside the device box 100, the device box 100 is fixedly connected with a mounting bracket 101, and the installation of the device is facilitated through the mounting bracket 101;

[0023] First of all, the voltage transformer 200 selects the VPU series of Schneider Electric, which has accurate voltage measurement capability and is suitable for low-voltage power distribution network, such as VPU20;

[0024] The current transformer 300 selects the TVC series of ABB, which is suitable for outdoor and indoor installation and provides high-precision current monitoring capability, such as TVC20;

[0025] The charge controller 500 selects the Smart-UPS 1000VA of APC, and the battery 400 selects the LC-R127R2 of Panasonic, which is a 12V 7.2Ah sealed lead-acid battery;

[0026] Further, the master control device 600 comprises a protective cover 601, a circuit board 602, a processor and a signal processing system, the protective cover 601 is fixedly connected in the device box 100, the circuit board 602 is fixedly connected in the protective cover 601, the processor is installed on the circuit board 602, and the signal processing system is arranged, the processor is TMS320F28069 of Texas Instruments (TI), a C2000 series DSP commonly used in power systems, having real-time processing capability, suitable for fault detection and analysis of power distribution network, of course, the processor is matched with a storage, the storage is K4B2G1646E of Samsung, used for storing fault characteristics and analysis algorithm, the algorithm can be impedance method, that is, the fault distance is calculated by detecting the impedance change from the fault point to the detection point, and the fault point is located;

[0027] Traveling wave method, that is, the propagation time difference of electromagnetic traveling wave when the fault occurs is detected to locate the fault position;

[0028] Pattern recognition algorithm, that is, a specific fault pattern is recognized by using a machine learning or artificial intelligence algorithm;

[0029] The signal processing system comprises an analog-to-digital converter, a digital signal processor and a signal amplifier connected in sequence, specifically, the analog-to-digital converter is ADS1256 of Texas Instruments (TI), a 24-bit high-precision ADC, having a multi-channel input, suitable for high-precision current and voltage signal acquisition;

[0030] The digital signal processor is TMS320F28335 of Texas Instruments (TI), suitable for real-time data processing and control tasks, commonly used in power electronics and industrial control;

[0031] The signal amplifier is INA240 of Texas Instruments (TI), a high-precision amplifier suitable for current sensing, capable of suppressing noise influence and providing accurate signal amplification function;

[0032] In summary, the voltage transformer 200 and the current transformer 300 are electrically connected with the power distribution network line, the charging controller 500 is electrically connected with the storage battery 400, the charging controller 500 is electrically connected with the line of the power distribution network, the voltage transformer 200 and the current transformer 300 are signal connected with the analog-to-digital converter of the master control device 600, and the wireless signal transmission module is further fixedly connected in the device box 100, the wireless signal transmission module selects SCALANCE M876-4 of Siemens, supports GPRS, 3G / 4G wireless communication, and is suitable for use in remote or inconvenient wired communication occasions, the processor is electrically connected with the wireless signal transmission module, and the wireless signal transmission module is signal connected with the remote PC end 700;

[0033] The working principle is as follows: the voltage transformer 200 and the current transformer 300 collect voltage and current signals in the distribution network. The collected signals can be transmitted to the analog-to-digital converter, which converts the signals into digital signals. The digital signals then enter the digital signal processor, where digital filtering technology is used to eliminate noise. The signals then enter the signal amplifier for amplification, and finally, the signals enter the processor.

[0034] When an anomaly is detected, the processor determines the type and location of the fault based on the detected feature data, the topology of the distribution network, and the algorithm.

[0035] Fault information can be transmitted to a remote PC 700 via a wireless signal transmission module;

[0036] Furthermore, the device box 100 is also equipped with an inspection port, and a sealing cover 102 is hinged to one side of the inspection port. An electromagnetic lock is fixedly connected to the sealing cover 102 and is electrically connected to the processor. This can protect the device box 100, so that the remote PC terminal 700 can control the solenoid valve 103 to open the sealing cover 102 only after verification, thereby improving the safety of the device.

[0037] Furthermore, a display 104 is fixedly connected to the closed cover 102. The display 104 can be an Advantech TPC-1251T display 104, which is connected to the processor signal. In this way, the detected voltage and current data can be displayed on the display 104, so that maintenance personnel can view and maintain it on site, thereby improving the convenience of maintenance.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power distribution network fault location device comprising a device box (100), a voltage transformer (200), a current transformer (300), a master control device (600), a storage battery (400) and a charging controller (500), characterized in that: The device box (100) is fixedly connected with the voltage transformer (200), the current transformer (300), the main control device (600), the storage battery (400) and the charging controller (500), the voltage transformer (200) and the current transformer (300) are electrically connected with the power distribution network line, the charging controller (500) is electrically connected with the storage battery (400), the charging controller (500) is electrically connected with the line of the power distribution network, the voltage transformer (200) and the current transformer (300) are signal connected with the main control device (600), the device box (100) is further fixedly connected with a wireless signal transmission module, the main control device (600) is electrically connected with the wireless signal transmission module, and the wireless signal transmission module is signal connected with a remote PC end (700).

2. The power distribution network fault location apparatus of claim 1, wherein: The main control device (600) comprises a protective cover (601), a circuit board (602), a processor and a signal processing system, the device box (100) is fixedly connected with the protective cover (601), the protective cover (601) is fixedly connected with the circuit board (602), the processor is installed on the circuit board (602), and the signal processing system is arranged on the circuit board (602), the processor is matched with a storage, the signal processing system is signal connected with the processor, the voltage transformer (200) and the current transformer (300) are signal connected with the signal processing system, and the processor is signal connected with the wireless signal transmission module.

3. A power distribution network fault locator device according to claim 2, characterised in that: The signal processing system comprises an analog-to-digital converter, a digital signal processor and a signal amplifier which are connected in sequence.

4. The power distribution network fault location apparatus of claim 2, wherein: The device box (100) is further provided with an access hole, one side of the access hole is hingedly connected with a closure cover (102), the closure cover (102) is fixedly connected with an electromagnetic lock, and the electromagnetic lock is electrically connected with the processor.

5. A power distribution network fault locator device according to claim 4, characterised in that: The closure cover (102) is fixedly connected with a display (104), and the display (104) is signal connected with the processor.

6. The power distribution network fault location apparatus of claim 1, wherein: The device box (100) is fixedly connected with a mounting rack (101).

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