CN110460155A - Feeder terminal with image processing and comparison functions and its fault monitoring method - Google Patents

Abstract

The invention relates to a feeder terminal with image processing and comparison functions, comprising: a CPU module, a data storage module, a communication module, an analog input module, a switching value I/O module, and a power supply module, and the data storage module is connected to the CPU module To realize two-way data communication, the power supply module is electrically connected to the CPU module and the communication module to supply power for it; the analog input module and the digital I/O module are respectively electrically connected to the CPU module to measure the electrical quantity of the line and control the switch on the column opening and closing action. The invention also relates to a fault detection method for a feeder terminal with image processing and comparison functions. The present invention monitors the running state of the switches and lines on the column in real time, and improves the automation of the distribution network system; in the case of a line or switch failure, the operation and maintenance personnel can go to the scene to deal with it in time to avoid the expansion of the accident; in the normal operation state of the lines and switches In this way, the frequency of manually checking lines on the spot is reduced, and the waste of manpower and material resources is reduced.

Description

Feeder terminal with image processing and comparison functions and its fault monitoring method

technical field

The invention relates to the technical field of power distribution automation, in particular to a feeder terminal with image processing and comparison functions and a fault monitoring method thereof.

Background technique

The feeder terminal is also called FTU, which has the functions of remote signaling, telemetry, remote control, fault detection, etc., and communicates with the upper power distribution master station at the same time to provide the operation status and various parameters of the power distribution system, including switch status, current, voltage, power etc., the parameters when the line fails, and execute the command issued by the power distribution master station, adjust, open and close the power distribution switchgear and control the energy storage, and realize fault location, fault isolation and rapid restoration of power supply in non-faulty areas, etc. Function.

With the rapid development of chip technology, computer network and communication, the R&D and design of feeder terminals have become relatively mature. Various manufacturers have made full use of advanced technology to develop feeder terminal products that meet the requirements of distribution network automation, and their reliability has become more and more stable. However, due to the scattered distribution of rural and urban distribution networks in my country, the large quantity and wide area, and the pole-mounted switches and feeder terminals are mostly pole-mounted equipment installed on high-voltage utility poles, the installation height is high, and on-site maintenance is time-consuming and laborious. Security risks. The transportation inspection department of the State Grid still needs to carry out activities such as spring and autumn inspections with a huge amount of engineering every year, resulting in a waste of manpower and material resources.

Contents of the invention

In order to solve the shortcomings of the prior art, the invention discloses a feeder terminal with image processing and comparison functions and a fault monitoring method thereof. The invention has the advantages of high automation, high integration, and small operation and maintenance workload.

To achieve the above object, the specific scheme of the present invention is as follows:

A feeder terminal with image processing and comparison functions, including: a CPU module with image processing and comparison functions, a data storage module, a communication module, an analog input module, a switching value I/O module, and a power supply module. The data storage module is connected with the CPU module to realize two-way data communication, and the power supply module is electrically connected with the CPU module and the communication module to provide power for it; the analog input module and the switching value I/O module are connected with the CPU module respectively The connection is used to measure the electrical quantity of the line and control the opening and closing action of the switch on the column; the communication module is electrically connected to the CPU module, and the CPU module sends a fault signal to the power distribution master station through the communication module.

The CPU module adopts a DSP-based hardware development platform, and the software is equipped with a corresponding image analysis algorithm for real-time processing of the digital signal of the image stored in the data storage module, and is compared with the preset image standard under normal operation. value for comparison. When the difference exceeds the predetermined difference, it is determined that there is a fault in the switch on the pole and the line, such as too much dust on the insulator, a short circuit fault on the line, and the opening and closing of the switch on the pole are not in place. The master sends a fault signal. The DSP chip uses a high-speed digital processing chip. In terms of hardware, factors such as the chip's external bus structure, on-chip memory structure, DMA function, serial communication port, and inter-chip communication capabilities are considered. The CPU module also needs to collect, calculate and process data on the digital I/O module and analog input module, and transmit the data information to the power distribution master station to meet the functional requirements of the system as a whole.

The data storage module is connected with the CPU module as an extended external memory of the internal memory of the DSP chip, and the data storage module is divided into two areas: partition one and partition two. Partition 1 is used to store the image information data collected by the digital camera when the line is running normally, and Partition 2 is used to store the image information data collected by the digital camera when the line is running in real time. The CPU performs digital signal calculation and processing on the image information of the two partitions of the data storage module, and compares the processing results.

The communication module is connected to the CPU module and adopts a wireless communication method to mainly complete when the difference between the real-time running image data and the preset standard value exceeds the set difference, the CPU module sends the fault to the power distribution master station through the communication module Signal, so that personnel can go to the scene in time to deal with abnormal situations.

The analog quantity input module is connected with the CPU module, and is used to measure electrical quantities such as voltage, current, frequency, active power and reactive power of the line, and determine the fault section of the line through calculation and comparison.

The switch I/O module is connected with the CPU module and is composed of several digital input and output channels with photoelectric isolation, which can effectively control the opening and closing action of the switch on the column, monitor its position and state changes in real time, and start the storage process, issue a fault signal, etc.

The power supply module is connected to the CPU module and is composed of several AC/DC conversion modules, which can simultaneously provide DC working power for the communication module, pole-mounted switch opening and closing, feeder terminal operation, etc., and the power output and input need to be electrically isolated.

As an auxiliary device, the digital camera is installed on the pole where the switch on the pole is located, and is used in conjunction with the feeder terminal to monitor the real-time operation status of the switch on the pole and the incoming and outgoing lines. The digital camera uses digital signals to collect image information, connects with the data storage module and CPU module of the feeder terminal through the RJ interface network cable, and receives the image demand signal command sent by the CPU module to perform image collection. The collected image data is transmitted to the data storage module of the feeder terminal.

The fault monitoring method of the feeder terminal with image processing and comparison functions stores the normal digital image information collected by the digital camera as a standard value, compares the real-time digital image information collected by the digital camera with the standard value, and if the difference between the two When exceeding the preset standard deviation value, the CPU module sends a fault signal to the power distribution master station through the communication module. Specifically include the following steps:

Step 1, the digital camera collects image information of normal operation;

Step 2, the digital camera sends the normal operation image information to partition one of the data storage module as a standard value;

Step 3. The power distribution master station sends an image demand signal to the CPU module;

Step 4, the CPU module issues instructions to the digital camera to collect real-time running image information;

Step 5, the digital camera sends real-time running image information to partition two of the data storage module;

Step 6, the data storage module transmits the real-time running image information data to the CPU module, compares it with the standard value, and determines whether it exceeds the preset difference, if yes, go to the next step, if not, go to step 4;

Step 7. The CPU module sends a fault signal to the power distribution master station.

Beneficial effects of the present invention:

1. Real-time monitoring of the operating status of switches and lines on the column, improving the automation of the distribution network system.

2. In the event of a line or switch failure, the operation and maintenance personnel can go to the scene to deal with it in time to avoid the expansion of the accident.

3. In the normal operation state of the lines and switches, reduce the frequency of manual on-site inspection of the lines and reduce the waste of manpower and material resources.

Description of drawings

In order to more clearly illustrate specific embodiments of the present invention or technical solutions in the prior art, the following briefly introduces the accompanying drawings that are required in the description of specific embodiments or prior art. Obviously, the accompanying drawings in the following description are some specific implementations of the present invention, and those skilled in the art can also obtain other protection scopes belonging to the present application based on these drawings without creative work. attached drawings.

Fig. 1 is a system structure diagram of a feeder terminal according to an embodiment of the present invention;

Fig. 2 is a working flowchart of the control method of the embodiment of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 1 , it is a system structure diagram of a feeder terminal according to an embodiment of the present invention. The system structure of a feeder terminal with image processing and comparison functions is divided into six parts: CPU module, data storage module, communication module, analog input module, digital I/O module, and power supply module. Described data storage module links to each other with CPU module and realizes two-way data communication, and described power supply module is connected with CPU module, communication module respectively for its power supply; Described analog quantity input module, digital I/O module are respectively connected with CPU The module is electrically connected to measure the electrical quantity of the line and control the opening and closing action of the switch on the column; the communication module is electrically connected to the CPU module, and the CPU module sends a fault signal to the power distribution master station through the communication module.

As shown in FIG. 2 , it is a working flowchart of the control method of the embodiment of the present invention. A fault monitoring method for a feeder terminal with image processing and comparison functions, comprising the following steps:

The digital camera is installed on the pole corresponding to the switch on each pole, and uses its internal AC/DC module to collect the image information of the switch on the pole and the overhead line under normal operation, and transmit the data to the feeder terminal through the RJ interface network cable The data storage module partition one, as the standard value;

The power distribution master station sends the image demand signal to the CPU module of the feeder terminal;

After receiving the image demand signal from the power distribution master station, the CPU module issues instructions to the digital camera through communication, and collects image information of the switch on the pole and the real-time operation status of the line;

After the digital camera receives the image acquisition instruction sent by the CPU module, it performs image acquisition of the switch on the column and the real-time operation status of the line, and transmits the acquired information to the feeder terminal data storage module partition 2 through the communication module in real time;

The CPU module of the feeder terminal extracts the real-time image information of the second partition of the data storage module, processes the information, and compares it with the standard value in the first partition. When the difference between the two exceeds the preset standard deviation, the CPU module sends a fault signal to the power distribution master station through the communication module.

Finally, it should be noted that the above examples are only specific implementations of the present invention, and are used to illustrate the technical solutions of the present invention, rather than limit them, and the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that: any person familiar with the technical field within the technical scope disclosed in the present invention can modify the technical solutions described in the foregoing embodiments or can easily think of changes, or modify some of the technical features. Equivalent replacement; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the present invention, and should be covered within the protection scope of the present invention.

Claims (10)

1. the line feed terminals for having image procossing and comparison function characterized by comprising have image procossing and comparison function CPU module, data memory module, communication module, Analog input mModule, switching value I/O module, power module, it is described Data memory module be connected with CPU module realize bidirectional data communication, the power module respectively with CPU module, communicate mould Block electrically connects as its power supply；The Analog input mModule, switching value I/O module are electrically connected with CPU module respectively, for surveying The divide-shut brake movement measured the electrical quantity of route, control on-pole switch；The communication module is electrically connected with CPU module, CPU module Fault-signal is sent to distribution main website by communication module.

2. line feed terminals according to claim 1, which is characterized in that the CPU module is used based on the hard of dsp chip Part development platform, software aspects are equipped with corresponding image analysis algorithm, for the number to image stored in data memory module Word signal is handled in real time, and is compared with the graphics standard value under default normal operation, is led to when a failure occurs it It crosses communication module and sends fault-signal to distribution main website；CPU module also switch amount I/O module, Analog input mModule carry out Data acquisition is calculated and is handled, and data information is sent to distribution main website.

3. line feed terminals according to claim 2, which is characterized in that the dsp chip selects high-speed figure to handle core Piece, hardware aspect consider the external bus structure of chip, on-chip memory structure, DMA function, serial communication port and chip chamber Communication capacity.

4. line feed terminals according to claim 1-3, which is characterized in that the data memory module conduct Expand external memory, is divided into the area Liang Ge: subregion one and subregion two；Digital camera when subregion one is used to operate normally route The image information data of acquisition stores, and the image information data of digital camera acquisition is deposited when subregion two is used for route real time execution Storage.

5. line feed terminals according to claim 1-3, which is characterized in that the communication module is using wireless Communication mode.

6. line feed terminals according to claim 1-3, which is characterized in that the Analog input mModule is used The voltage of route, electric current, frequency and active and reactive are measured, by calculating contrast judgement line fault section；

If the switching value I/O module is made of main line with the digital input and output channel of Phototube Coupling, controls and opened on column The divide-shut brake of pass acts, and monitors that its location status changes in real time, and starting thermal energy storage process, issues fault-signal.

7. line feed terminals according to claim 1-3, which is characterized in that if the power module is by main line AC/DC conversion module is constituted, and can be simultaneously communication module, the operation of on-pole switch divide-shut brake, line feed terminals provides DC operation electricity Source.

8. line feed terminals according to claim 1-3, which is characterized in that digital camera is as ancillary equipment It where being installed on on-pole switch on electric pole, is used cooperatively with line feed terminals, monitoring on-pole switch and inlet-outlet line route real time execution Situation.

9. the fault monitoring method for having the line feed terminals of image procossing and comparison function, which is characterized in that by digital camera The normal digital image information of acquisition is stored as standard value, the real-time digital image information and standard that digital camera is acquired Value compares, if the difference of the two is more than pre-set standard deviation, CPU module is sent out by communication module to distribution main website Send fault-signal.

10. the fault monitoring method of the line feed terminals according to claim 9 for having image procossing and comparison function, special Sign is, specifically includes the following steps:

Step 1, digital camera acquisition operate normally image information；

Step 2, digital camera send the subregion one for operating normally image information to data memory module, as standard value；

Step 3, distribution main website send image desired signal to CPU module；

Step 4, CPU module acquire real time execution image information to sending instructions under digital camera；

Step 5, digital camera send the subregion two of real time execution image information to data memory module；

Real time execution image information data is sent to CPU module by step 6, data memory module, is compared, is sentenced with standard value It is fixed whether to exceed preset difference value, if it is, turn in next step, if not, to go to step 4；

Step 7, CPU module send fault-signal and give distribution main website.