CN201749168U - Line Operation Fault Online Monitoring System - Google Patents

Abstract

The utility model relates to an online fault monitoring system for line operation, comprising a detection circuit module, an analysis algorithm circuit module, a trigger circuit module, a wireless transmission circuit module, a power supply circuit module, a communication host, a solar battery and a device for sending information to a background system and a mobile phone GSM module. The utility model realizes sending the collected signal into the background system by measuring the transient current change of the line and transmitting the data through the GSM network, so as to achieve the purpose of on-line monitoring of line operation faults. Connect the detection terminal, the background system and the staff through the GSM network, use the background system to process and judge the line collection signal, and send the fault description information to the staff after the fault occurs, so as to realize the monitoring of the line operation. The utility model realizes the on-line monitoring of the operation status of the line, and provides an effective guarantee for speeding up the detection and repair of the line, increasing the fast control of the power grid and safe operation.

Description

Line Operation Fault Online Monitoring System

technical field

The utility model relates to an online fault monitoring technology for power line operation, in particular to a line fault online intelligent monitoring system with remote transmission capability.

Background technique

During the power transmission and distribution process of the system, due to the long transmission distance of the line, the complex terrain along the way, the harsh environmental and climatic conditions, and the high pressure of power supply, the failure rate increases. The urban distribution network mostly adopts the operation mode of ungrounded neutral point. The fast and accurate positioning of line faults, especially single-phase ground faults, can improve power supply reliability, reduce power outage time, and reduce manual fault inspection time. Parameters such as voltage rise or fall during operation, whether the line is charged, zero-sequence current, capacitive current at the moment of grounding, and high-order harmonic current at the moment of grounding, and the sequence of occurrence, will play a role in the safe operation of the line. pivotal role. Therefore, many scholars at home and abroad have done a lot of research on the detection and location of faults in transmission and distribution lines.

However, in the existing fault detection methods for line operation, the outdoor fault point detection method is mainly used to locate the fault point by using an outdoor fault indicator or FTU to realize segmented fault location. This method has the problems of not being able to detect single-phase ground faults and not realizing remote alarm and automatic positioning functions, and the detection accuracy is low. Therefore, a system with more accurate single-phase ground fault detection and positioning functions is needed. The system of the utility model can monitor the operation of the line in real time, transmit the characteristic data collected by the detection terminal to the monitoring center, and after the analysis of the monitoring center, send the fault description information to the mobile phone of the maintenance personnel on duty, and display the specific location on the computer.

Contents of the invention

The purpose of the utility model is to provide an online fault detection system for line operation. The system is suitable for overhead lines and cable lines. It speeds up the line fault detection and repair speed, shortens the power outage time, increases the reliability and quality of power supply, and monitors various conditions of the line in an all-round way, improving the level of line operation; realizing fast control and effective management of the power grid .

In order to achieve the above purpose, the technical solution adopted by the utility model is as follows, that is, an online fault monitoring system for line operation, which is characterized in that it includes a detection circuit module, an analysis algorithm circuit module, a trigger circuit module, a wireless transmission circuit module, a power supply Circuit modules, communication hosts, solar batteries and GSM modules that send information to background systems and mobile phones, of which:

a) The detection module adopts a current transformer, which is used to measure the transient current when the line is running, and its output terminal is connected to the input terminal of the analysis algorithm circuit module through the A/D converter;

b) The analysis algorithm circuit module includes a CPU and an A/D converter, and its output terminal is connected to the input terminal of the trigger circuit module;

c), the trigger circuit module is connected to the input end of the wireless transmission circuit module (4) through its output end;

d), the wireless transmission circuit module is used to transmit the collected information through GSM, and its output terminal is connected to the input terminal of the communication host;

e), the power circuit module is used to convert the power supply voltage of the battery into a 5V power supply voltage, and supply power to the analysis algorithm circuit module, trigger circuit module and wireless transmission circuit module respectively;

f), the output end of the communication host is connected to the input end of the GSM module;

g) The solar battery uses solar energy to supply power to the detection terminal and the communication host, and its output is connected to the power supply circuit module and the input of the communication host.

The on-line fault monitoring system for running faults provided by the utility model makes up for the problems that the previous detection systems cannot detect single-phase grounding faults and the fault location accuracy is low, and also adds some auxiliary functions to enable it to have remote transmission capabilities, distributed monitoring, centralized Management, instant notification type online monitoring system. The system has good effect, high reliability, shortens troubleshooting time, and adapts to the actual needs of the power company.

Description of drawings

Fig. 1 is a device structure diagram of the present utility model.

Fig. 2 is the operation flowchart of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, invention will be further described:

Refer to Figure 1: The online fault monitoring system for line operation in the figure includes a detection circuit module 1, an analysis algorithm circuit module 2, a trigger circuit module 3, a wireless transmission circuit module 4, a power supply circuit module 5, a communication host 6, a solar battery 7 and The GSM module 8 that sends information to the background system and mobile phone, wherein:

a), the detection module 1 adopts a current transformer, which is used to measure the transient current when the line is running, and its output terminal is connected to the input terminal of the analysis algorithm circuit module 2 through an A/D converter;

b) The analysis algorithm circuit module 2 includes a CPU and an A/D converter, the output end of which is connected to the input end of the trigger circuit module 3;

c), the trigger circuit module 3 is connected to the input end of the wireless transmission circuit module 4 through its output end;

d), the wireless transmission circuit module 4 is used to transmit the collected information through GSM, and its output end is connected to the input end of the communication host 6;

e), the power circuit module (5) is used to convert the power supply voltage of the storage battery into a power supply voltage of 5V, and supply power to the analysis algorithm circuit module 2, the trigger circuit module (3) and the wireless transmission circuit module 4 respectively;

f), the communication host 6 receives the signal collected from the detection module, and its output end is connected to the input end of the GSM module 8;

g) The solar battery 7 uses solar energy to supply power to the detection terminal and the communication host, and its output end is connected to the power circuit module 5 and the input end of the communication host 6.

In a non-limiting embodiment, the detection circuit module 1 of the system adopts the TR0150-1B current transformer of Hubei Tianrui Company to collect the current signal on the line; the analysis algorithm circuit module 2 adopts the PIC18F-4420 of Microchip Company The trigger circuit module 3 uses a triode; the wireless transmission circuit module 4, the communication host 6, and the GSM module 8 all use TC35i produced by Siemens; the power circuit module 5 uses a power conversion chip LM2576-5.0; The storage battery produced by Pigeon Co., Ltd. is used for power supply.

In the above system, the detection terminal is composed of the detection module 1 , the analysis algorithm circuit module 2 , the trigger circuit module 3 , the wireless transmission circuit module 4 , and the power supply circuit module 5 . Three sets are a group of detection terminals, which are responsible for detecting the data of the line. Each group shares a communication host and its GSM module, and can transmit the collected data information to the background system 9 through the GSM network.

The communication host and detection terminal are powered by solar batteries. The storage battery utilizes countless photosensitive battery components connected in series to directly convert solar energy into electrical energy. Solar cell modules are solid devices that utilize the electronic properties of semiconductor materials to achieve P-V conversion. It is a device that responds to light and can convert light energy into electricity. It uses polycrystalline silicon materials that produce high photovoltaic effects.

The background system mainly judges the fault based on the fault criterion provided by the power supply bureau and the principle of parameter setting. The principle is as follows:

1. If the grounding line is in the power supply state, and there is a sudden increase in the transient capacitive current in the line, and the voltage of the grounding line drops by more than 3kV, it is judged as a single-phase grounding fault;

2. Due to lightning strikes and loose lines, etc., the line is tripped due to instantaneous overcurrent, but the power supply is normal, and no permanent short circuit is caused, it is judged as overcurrent;

3. If there is a sudden change of current in the line for more than 3 seconds, and the line is in a power failure state after 3 seconds, it is judged as a phase-to-phase short circuit fault. 

The background system software has the functions of short circuit fault, ground fault, overcurrent, electrification, power transmission and temperature detection, and can regularly retrieve line information from the line according to the set time, thus forming a very intuitive graph, for It provides an important basis for maintaining lines and preventing major hidden situations. In addition, the total judgment function of the system improves the detection reliability by judging the sum of the reactions of each line and the different phases of the same line when a fault occurs. The resident interface of the system shows the distribution of the power grid in the area under its jurisdiction with graphics. On the interface, when a fault occurs, the prompt icon changes color, the computer sounds an alarm, and sends fault description information to the mobile phone of the management personnel as required.

Claims (2)

1. circuit operation troubles on-line monitoring system, it is characterized in that: comprise testing circuit module (1), analytical algorithm circuit module (2), trigger circuit module (3), wireless transmission circuit module (4), power circuit module (5), communication host (6), solar storage battery (7) and send the gsm module (8) of information to background system and mobile phone, wherein:

A), detection module (1) adopts current transformer, the transient current when being used for the measuring circuit operation, its output terminal links to each other with analytical algorithm circuit module (2) input end by A/D converter;

B) analytical algorithm circuit module (2) comprises CPU and A/D converter, and its output terminal links to each other with trigger circuit module (3) input end;

C), trigger circuit module (3) links to each other with the input end of wireless transmission circuit module (4) by its output terminal;

D), wireless transmission circuit module (4) is used for transmitting the information collect by GSM, its output terminal links to each other with host computer communication (6) input end;

E), power circuit module (5) is used for the supply voltage of accumulator is converted to the supply voltage of 5V, respectively to analytical algorithm circuit module (2), trigger circuit module (3) and wireless transmission circuit module (4) power supply;

F), the output terminal of communication host (6) links to each other with gsm module (8) input end;

G), solar storage battery (7) is to the power supply of sense terminals and host computer communication, its output terminal links to each other with the power input of power circuit module (5) with communication host (6).

2. circuit operation troubles on-line monitoring system according to claim 1 is characterized in that, by detection module (1), analytical algorithm circuit module (2), trigger circuit module (3), wireless transmission circuit module (4), power circuit module (5) constitutes sense terminals; Three sense terminals are one group, every group of shared host computer communication and gsm module thereof.

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