CN103490514B - Rural power distribution grid electricity leakage protection device monitoring, controlling and fault detecting method - Google Patents

Abstract

The invention discloses a method for monitoring and controlling the leakage protection device of a rural distribution network and fault inspection. It automatically collects the phase current of the secondary side of the transformer in each distribution station area through an intelligent terminal, and then according to whether there is a trip operation record, Whether the tripping is completed within the specified time, the phase current at the time of tripping determines the type of tripping, and the master station sends a trip command to the leakage protection device to detect whether the leakage protection device can operate normally, and the control master station is based on the protection start record and The result of the protection action is used to analyze the current operation status of the leakage protector device. The invention can remotely monitor the leakage protection device of each distribution station area; can remotely control the action of the leakage protection device of each distribution station area; can distinguish the action cause of the leakage protection device; and can perform fault inspection on the leakage protection device.

Description

Method of Monitoring and Controlling and Fault Inspection of Rural Distribution Network Leakage Protection Device

technical field

The invention relates to a method for monitoring and controlling a leakage protection device of a rural power distribution network and for fault inspection.

Background technique

After many years of transformation and construction in my country's rural power grids, leakage protection devices (generally composed of leakage protectors and AC contactors) have been widely popularized and become an important line of defense to ensure the safety of rural customers' electricity use. The device is still in the backward state of manual maintenance, and it is impossible to know the operating status of the leakage protection device in time. After the leakage protection device trips, it cannot be found and dealt with in time, and the station staff must go to the site to restore the power, which cannot effectively guarantee the reliability of the power supply. The management mode cannot accurately grasp whether the leakage protection device is in good condition and whether it is working normally.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for monitoring and controlling the leakage protection device of the rural distribution network and fault inspection. By using this method, the leakage protection device of each distribution station area can be remotely monitored, so as to know in time The operating status of the leakage protection device; it can remotely control the action of the leakage protection device in each distribution station area, so as to restore the power supply in time; it can distinguish the reason for the action of the leakage protection device, so that the operator can handle it accordingly; it can control the leakage protection device Fault inspection, in order to find the fault of leakage protection device in time.

In order to solve the above-mentioned technical problems, the method for monitoring and controlling the leakage protection device of the rural distribution network provided by the present invention and fault inspection, it includes the following steps:

(1) Connect the power lines of the leakage protection devices on each outlet circuit of the distribution station area through an intelligent terminal control circuit, and connect the position signal contacts of the leakage protection devices on each outlet circuit of the distribution station area The signal circuit of the corresponding intelligent terminal connects each intelligent terminal with a control master station through GPRS/CDMA wireless connection, and remotely controls the leakage protection device on each outlet circuit of each distribution station area through the control master station to trip, close, Unlocking and closing operation, real-time monitoring of the status of leakage protection devices on each outlet circuit of each distribution station area by controlling the master station;

(2) Automatically collect the phase currents I _a , I _b , and I _c of the secondary side transformers in each distribution station through the intelligent terminal and report them to the control master station;

(3) When the control master station detects that the leakage protection device trips, the control master station inquires whether there is a corresponding trip operation record, if there is, it is judged as a remote operation trip, if not, it is judged as an on-site trip;

(4) Set the leakage protection device status detection duration t through the control master station and send it to each smart terminal. When the site trips, the smart terminal detects whether the corresponding leakage protection device trips-closes-trips within the time t, If so, it is judged that the leakage protection device is a normal trip, if not, it is judged that the leakage protection device is an abnormal trip;

(5) Set the overload current I by controlling the master station, and when the site trips, if the corresponding intelligent terminal detects that the current of any phase on the secondary side of the transformer in the corresponding distribution station exceeds I, it will be judged as an overload trip;

(6) Select the leakage protection device on the outlet circuit of the transformer in the distribution station area by the control master station to perform manual remote test tripping. After the control master station issues a test trip command, the intelligent terminal detects whether the leakage protection device on the corresponding outlet circuit is It has been tripped, if so, the intelligent terminal sends a message that the trial jump is successful to the control master station, if not, the intelligent terminal sends an alarm message to the control master station;

(7) Set the test trip task by controlling the master station, specify the trial trip time and the trial trip circuit, and automatically send trip instructions to the leakage protection devices on each outlet circuit of the transformer in the designated distribution station at the specified time, and then pass The smart terminal detects whether the corresponding leakage protection device has completed the tripping operation. If so, the smart terminal sends the information that the leakage protection device is normal to the control master station, and controls the leakage protection device to close. information to the control master.

(8) Intelligently judge the operating status of the leakage protection device through the control master station. The control master station analyzes the current operation status of the leakage protector device according to the protection start record and protection action results. After the protection starts, if the leakage protector trips and changes If the bit is correct, it indicates that the leakage protector is normal. When the protection starts, if the leakage protector fails to trip, it indicates that the leakage protector is abnormal.

As an improvement, when the control master station receives the information of the leakage protection device failure, the control master station will send a short message to inform the management personnel through the customized content of the short message.

After adopting the above method, the present invention has the following advantages compared with the prior art:

The invention has simple wiring and wide application range, and can monitor the operating status of the leakage protection devices in each distribution station area in real time by controlling the master station. Once a leakage protection device is found to trip, it can be found and processed in time; Send instructions to the corresponding intelligent terminal, and then the intelligent terminal controls the action of the corresponding leakage protection device, so that the control master station can remotely control the leakage protection device to perform actions such as tripping, closing, unlocking and closing, etc. When a leakage protection device is found to trip It can remotely control the closing of the leakage protection device to restore the power supply in time; it can distinguish the remote operation trip, field trip, normal trip, abnormal trip, and overload trip of the leakage protection device, so that the operator can perform corresponding actions according to different action reasons. Processing; through the control of the master station, the leakage protection device of each distribution station area can be inspected, that is to say, the leakage protection device on each outlet circuit in each distribution station area is sent in turn. The trip command is then detected by the intelligent terminal. Whether the corresponding leakage protection device has completed the tripping operation, and the fault of the leakage protection device can be found in time, and the fault can be eliminated in time.

In addition, when the control master station receives the fault information of the leakage protection device, the control master station can send a customized text message to inform the management personnel, so that the management personnel can know the fault information of the leakage protection device in time, and arrive at the scene in time to repair the leakage protection device. troubleshooting.

Detailed ways

The present invention will be described in further detail below in combination with specific embodiments.

The invention provides a method for monitoring and controlling the leakage protection device of a rural distribution network and fault inspection, which includes the following steps:

(1) Connect the control circuit of an intelligent terminal with the power line of the leakage protection device on each outlet circuit of the distribution station area, and connect the position signal contacts of the leakage protection device on each outlet circuit of the distribution station area The position signal contact is also the auxiliary contact on the leakage protector for output signals. Through the position signal contact, the information of whether the leakage protection device has completed the tripping action can be fed back to the corresponding smart terminal. Each intelligent terminal is connected with a control master station GPRS/CDMA wirelessly, through the control master station, the leakage protection device on each outlet circuit of each distribution station area is remotely controlled to perform tripping, closing, unlocking and closing operations, and through the control master station in real time Monitor the status of leakage protection devices on each outlet circuit of each distribution station area;

(2) Automatically collect the phase currents I _a , I _b , and I _c of the secondary side transformers in each distribution station through the intelligent terminal and report them to the control master station;

(3) When the control master station detects that there is a leakage protection device tripping, the control master station inquires whether there is a corresponding tripping operation record on the control master station. If there is, it will be judged as a remote operation trip. If not, it will be judged as a On-site tripping;

(4) Set the leakage protection device status detection duration t through the control master station and send it to each smart terminal. When the site trips, the smart terminal detects whether the corresponding leakage protection device trips-closes-trips within the time t, If yes, it is judged that the leakage protection device is a normal trip, if not, it is judged that the leakage protection device is an abnormal trip,

(5) Set the overload current I by controlling the master station, and when the site trips, if the corresponding intelligent terminal detects that the current of any phase on the secondary side of the transformer in the corresponding distribution station exceeds I, it will be judged as an overload trip;

(6) Select the leakage protection device on the outlet circuit of the transformer in the distribution station area by the control master station to perform manual remote test tripping. After the control master station issues a test trip command, the intelligent terminal detects whether the leakage protection device on the corresponding outlet circuit is It has tripped, that is to say, the smart terminal detects whether the position signal contact of the leakage protection device on the corresponding outlet circuit has completed the closing information and feeds back to the smart terminal. If not, the intelligent terminal sends an alarm message to the control master station;

(7) Set the test jump task by controlling the master station, specify the test jump time and the test jump circuit, and automatically protect the leakage protection on each outlet circuit of the transformer in the designated distribution station at the specified time (around zero, when the user is idle) The device sends tripping instructions in sequence, and then detects whether the corresponding leakage protection device has completed the tripping operation through the intelligent terminal. The intelligent terminal sends the fault information of the leakage protection device to the control master station. Use this to judge whether the wiring of the leakage protector on site is normal, and if it is abnormal, it will be summarized and reported to the management personnel.

(8) Intelligently judge the operating status of the leakage protector by controlling the master station, and use the master station system to analyze the current leakage protector device based on the two data of the start record of the protection and the result of the protection action (that is, the displacement of the leakage protector) operating conditions. When the protection starts, if the leakage protector trips and shifts correctly, it will display that the leakage protector is normal; when the protection starts, if the leakage protector fails to trip, it will display that the leakage protector is abnormal.

When the control master station receives the information about the failure of the leakage protection device, the control master station will send a short message with customizable content to inform the management personnel.

The above is only a description of the preferred examples of the application of the present invention, but it should not be construed as a limitation on the claims. The structure of the present invention can have other changes and is not limited to the above structure. In a word, all the various changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims (2)

1. A method for monitoring and controlling and fault inspection of a rural power distribution network leakage protection device, is characterized in that it comprises the following steps: (1) Connect the power lines of the leakage protection devices on each outlet circuit of the distribution station area through an intelligent terminal control circuit, and connect the position signal contacts of the leakage protection devices on each outlet circuit of the distribution station area The signal circuit of the corresponding intelligent terminal connects each intelligent terminal with a control master station through GPRS/CDMA wireless connection, and remotely controls the leakage protection device on each outlet circuit of each distribution station area through the control master station to trip, close, Unlocking and closing operation, real-time monitoring of the status of leakage protection devices on each outlet circuit of each distribution station area by controlling the master station; (2) Automatically collect the phase currents I _a , I _b , and I _c of the secondary side transformers in each distribution station through the intelligent terminal and report them to the control master station; (3) When the control master station detects that the leakage protection device trips, the control master station inquires whether there is a corresponding trip operation record, if there is, it is judged as a remote operation trip, if not, it is judged as an on-site trip; (4) Set the leakage protection device status detection duration t by controlling the master station and send it to each smart terminal. When the site trips, the smart terminal detects whether the corresponding leakage protection device trips-closes-trips within the time t, If so, it is judged that the leakage protection device is a normal trip, if not, it is judged that the leakage protection device is an abnormal trip; (5) By controlling the master station to set the overload current I, when the site trips, if the corresponding intelligent terminal detects that any phase current on the secondary side of the transformer in the corresponding distribution station exceeds I, then it is determined to be an overload trip; (6) Select the leakage protection device on the outlet circuit of the transformer in the distribution station area by the control master station to perform manual remote test tripping. After the control master station issues a test jump command, the intelligent terminal detects whether the leakage protection device on the corresponding outlet circuit is It has been tripped, if so, the intelligent terminal sends a message that the trial jump is successful to the control master station, if not, the intelligent terminal sends an alarm message to the control master station; (7) Set the test trip task by controlling the master station, specify the trial trip time and the trial trip circuit, and automatically send trip instructions to the leakage protection devices on each outlet circuit of the transformer in the designated distribution station at the specified time, and then pass The smart terminal detects whether the corresponding leakage protection device has completed the tripping operation. If so, the smart terminal sends the information that the leakage protection device is normal to the control master station, and controls the leakage protection device to close. Information to the control master station; (8) Through the intelligent judgment of the operating status of the leakage protection device through the control master station, the control master station analyzes the current operation status of the leakage protector device according to the protection start record and protection action results. After the protection is started, if the leakage protector trips and changes If the bit is correct, it indicates that the leakage protector is normal. When the protection starts, if the leakage protector fails to trip, it indicates that the leakage protector is abnormal. 2. The method for monitoring and controlling the leakage protection device of rural power distribution network according to claim 1 and the method for fault inspection, characterized in that: when the control master station receives the information of the leakage protection device failure, the control master station passes the customized SMS content, send a text message to inform the management personnel.