CN210604851U

CN210604851U - Power grid fault positioning system based on platform

Info

Publication number: CN210604851U
Application number: CN201921366823.0U
Authority: CN
Inventors: 徐敏; 胡聪; 张翠翠; 李金湖; 林海玉; 刘畅; 李涛
Original assignee: State Grid Corp of China SGCC; State Grid Information and Telecommunication Co Ltd; Information and Telecommunication Branch of State Grid Anhui Electric Power Co Ltd; Great Power Science and Technology Co of State Grid Information and Telecommunication Co Ltd
Current assignee: State Grid Corp of China SGCC; State Grid Information and Telecommunication Co Ltd; Information and Telecommunication Branch of State Grid Anhui Electric Power Co Ltd; Great Power Science and Technology Co of State Grid Information and Telecommunication Co Ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-05-22
Anticipated expiration: 2029-08-22

Abstract

The utility model relates to a power grid fault positioning system based on platform, including the main control unit that is located the monitor and with a plurality of distributed substation subsystems of main control unit wireless connection, the substation subsystem includes the sub-controller that is located the transformer substation and with the sub-controller is connected, sets up the sensor of detecting the travelling wave and the timing module that samples to the travelling wave arrival time at each circuit both ends of transformer substation; after the sensor detects the traveling wave signal, a timing module connected with the sensor is triggered to collect traveling wave arrival time, and the timing module sends the time to a sub-controller; the system has the advantages that GPS timing is used during traveling wave collection, accurate arrival time can be collected and then transmitted to the transformer substation for calculation, high-speed collection and transmission equipment is not needed, line rough location and line fault point accurate location based on traveling waves are combined through sensor serial numbers, and power grid faults can be rapidly and accurately reported and maintained.

Description

Power grid fault positioning system based on platform

Technical Field

The utility model relates to a grid fault detection device field specifically is a grid fault positioning system based on platform.

Background

The high-voltage transmission line has long transmission distance, and faults are easy to occur in field zones such as high mountains and canyons by multi-row lines, so that the problem to be solved by a power grid system is always solved aiming at accurate and quick positioning of fault points.

In the prior art, a multiple fault location method IS disclosed, chinese utility model patent CN209149346U discloses a distribution network fault fast-repair dispatching system, including the transmission network, online fault detection interface and range finding computer, online fault detection interface connection IS on the transmission network, range finding computer and online fault detection interface data connection, the range finding computer passes through the net twine and connects on the LAN, connect the GIS server on the LAN and be used for data acquisition, connect maintenance terminal on the LAN, through confirming fault location, GIS data content design, data communication and mobile terminal 'S analysis and design, make this system have higher intelligence, have very high dispatch efficiency to transmission line fault fast-repair command system' S practical application, still have following shortcoming: network delay generated when data are transmitted through a local area network and the limitation of the positioning accuracy of the GIS server cause poor fault positioning accuracy, only one range can be roughly determined, manual site investigation is still needed after the range is determined, and the positioning real-time performance is still to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a power grid fault positioning system based on platform is provided to solve the defect that exists among the prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a platform-based power grid fault positioning system comprises a main controller located in a monitoring room and a plurality of distributed substation subsystems in wireless connection with the main controller, wherein each substation subsystem comprises a sub-controller located in a substation, sensors connected with the sub-controllers and arranged at two ends of each line of the substation for detecting traveling waves and a timing module for sampling the arrival time of the traveling waves; after the sensor detects the traveling wave signal, a timing module connected with the sensor is triggered to collect traveling wave arrival time, and the timing module sends the arrival time of the traveling wave to a sub-controller;

further, the timing module transmits signals to the sub-controller through an RS485 bus;

further, the timing module adopts a GPS timing system to perform synchronous sampling;

further, the sensor is arranged on a CVT ground line at two ends of the line;

further, the sub-controller comprises a plurality of handheld terminals wirelessly connected with the sub-controller;

the utility model has the advantages that: the system has the advantages that GPS timing is used during traveling wave collection, accurate arrival time can be collected and then transmitted to the transformer substation for calculation, high-speed collection and transmission equipment is not needed, line rough location and line fault point accurate location based on traveling waves are combined through sensor serial numbers, and power grid faults can be rapidly and accurately reported and maintained.

Drawings

FIG. 1 is a schematic structural view of the present invention;

the reference numerals are explained below:

1. the system comprises a main controller, a transformer substation subsystem, a sub-controller, a sensor, a timing module, a circuit, a CVT ground wire and a controller, wherein the main controller is 2;

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, a platform-based grid fault location system includes a main controller 1 located in a monitoring room and a plurality of distributed substation subsystems 2 wirelessly connected with the main controller 1, where each substation subsystem 2 includes a sub-controller 3 located in a substation, a sensor 4 connected with the sub-controller 3 and arranged at two ends of each line of the substation to detect a traveling wave, and a timing module 5 for sampling a traveling wave arrival time; after the sensor 4 detects the traveling wave signal, a timing module 5 connected with the sensor is triggered to collect the arrival time of the traveling wave, and the timing module 5 sends the arrival time of the traveling wave to the sub-controller 3;

during specific implementation, once a certain line fails, traveling waves are transmitted to a connecting section of the line, after the sensors at two ends of the line monitor the traveling waves, the timing module samples the arrival time of the traveling waves and transmits the traveling waves to the sub-controllers, meanwhile, the sub-controllers also receive the serial number information from the two sensors, the sub-controllers determine which line the failure occurs according to the comparison between the serial numbers and the information stored in the database, then the specific position of the failure on the line is calculated according to the time sent by the timing module, and the sub-controllers upload the failure information and the position to the main controller for storage and display on a display screen in a monitoring room in real time; by establishing a platform-based fault positioning system, monitoring personnel can gather and check fault information in the whole power grid conveniently in real time.

In a specific embodiment, the timing module 5 performs signal transmission with the sub-controller 3 through an RS485 bus;

the RS485 interface has multi-station capability, so that an equipment network can be conveniently established, and the RS485 interface has good anti-interference capability; the adopted half-duplex working mode only needs two connecting wires, thereby effectively saving the cost;

in another specific embodiment, the timing module 5 uses a GPS timing system to perform synchronous sampling;

more specifically, the sensor 4 is arranged on a CVT ground wire 7 at both ends of a line 6;

the sub-controller 3 comprises a plurality of handheld terminals in wireless connection with the sub-controller; after detecting the fault, the sub-controller 3 can timely push the fault information and the position to maintenance personnel in the district to inform the maintenance personnel to maintain as soon as possible, so that the quick response capability of the whole system is improved.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A power grid fault positioning system based on a platform is characterized in that: the system comprises a main controller positioned in a monitoring room and a plurality of distributed substation subsystems wirelessly connected with the main controller, wherein each substation subsystem comprises a sub-controller positioned in a substation, sensors connected with the sub-controllers and arranged at two ends of each line of the substation for detecting traveling waves and a timing module for sampling the arrival time of the traveling waves; after the sensor detects the traveling wave signal, the sensor triggers a timing module connected with the sensor to acquire traveling wave arrival time, and the timing module sends the arrival time of the traveling wave to a sub-controller.

2. The platform-based grid fault location system of claim 1, wherein: and the timing module is in signal transmission with the sub-controller through an RS485 bus.

3. The platform-based grid fault location system of claim 2, wherein: the timing module adopts a GPS timing system to perform synchronous sampling.

4. A platform-based grid fault location system according to claim 3, wherein: the sensor is arranged on the ground of the CVT at two ends of the line.

5. The platform-based grid fault location system of claim 4, wherein: the sub-controller comprises a plurality of handheld terminals in wireless connection with the sub-controller.