CN104901427A - Substation communication system - Google Patents

Abstract

The present application discloses a substation communication system, including: a first communication channel, a second communication channel, a first self-loop device, and a second self-loop device; wherein, the first communication channel includes: a first station internal device, a first station The external device and the first communication line connecting the first internal device and the first external device; the second communication channel includes: the second internal device, the second external device and the second external device connecting the second internal device and the second external device Two communication lines; the first self-loop device is connected to the first external device through the first communication line; and the first self-loop device is connected to the second station internal device. In the first working state, the first self-loop device is used to The self-loop device in the first station; the second self-loop device is connected to the second external device through the second communication line, and the second self-loop device is connected to the first station device. In the second working state, the second self-loop device It is used to self-loop the device in the second station. The present application realizes rapid diagnosis of interrupt fault detection.

Description

A substation communication system

technical field

The invention relates to the technical field of electric power system communication, and more specifically, relates to a substation communication system.

Background technique

With the continuous development of computer technology and the improvement of computing power, substation automation has also been continuously improved in technology, covering more and more aspects. The responsibility borne by the communication system in the station is also becoming more and more important, and the consequences of interruption of the telecontrol communication in the station are becoming more and more serious.

At present, when an interruption occurs in the communication system, maintenance personnel must go to the site to conduct a self-loop test to confirm whether the interruption occurred inside or outside the station, and then notify the staff of the ICT company to deal with it, which increases the number of work trips and reduces work efficiency.

Contents of the invention

In order to solve the above problems, the present invention provides a substation communication system, which can confirm whether a communication fault occurs inside or outside the substation through the self-loop function, realizes rapid diagnosis of interrupted fault detection, and improves work efficiency.

In order to achieve the above object, the present invention provides the following technical solutions:

A substation communication system, the substation communication system includes: a first communication channel, a second communication channel, a first self-loop device and a second self-loop device; wherein,

The first communication channel includes: a first on-site device, a first off-site device, and a first communication line connecting the first on-site device and the first off-site device;

The second communication channel includes: a second on-site device, a second off-site device, and a second communication line connecting the second on-site device and the second off-site device;

The first self-loop device is connected to the first external device through the first communication line; and the first self-loop device is connected to the second internal device, and in the first working state, the The first self-loop device is used to self-loop the device in the first station;

The second self-loop device is connected to the second external device through the second communication line, and the second self-loop device is connected to the first internal device. In the second working state, the The second self-loop device is used for self-looping the second in-station device.

Preferably, in the above communication system, the first communication channel is a 101 communication channel using the 101 protocol;

The second communication channel is a 104 communication channel using the 104 protocol.

Preferably, in the above-mentioned communication system, the device in the first station includes: a first switch, a first remote controller and a modem connected in sequence;

The first communication line includes: an audio distribution frame connected to the modem through a first uplink channel and a first downlink channel; a first scheduling terminal connected to the audio distribution frame.

Preferably, in the above communication system, both the first uplink channel and the first downlink channel include two parallel sub-channels;

One subchannel of the first uplink channel is connected to one subchannel of the first downlink channel; another subchannel of the first uplink channel is connected to another subchannel of the first downlink channel.

Preferably, in the above communication system, the second in-station device includes: a second switch, a second remote controller, a real-time switch and a router connected in sequence;

The second communication line includes: a communication distribution frame connected to the router through a second uplink channel and a second downlink channel; and a second dispatching terminal connected to the communication distribution frame.

Preferably, in the above communication system, one end of the first self-loop device is connected to the second remote machine, and the other end is connected to the first external station through the first uplink channel and the first downlink channel. device connection.

Preferably, in the above communication system, one end of the second self-loop device is connected to the first remote machine, and the other end is connected to the second external device through the second uplink channel and the second downlink channel connect.

Preferably, in the above communication system, the first self-loop device includes: a receiving module for receiving self-loop instructions; an execution module for executing the self-loop instructions and performing self-loop control; and a power supply module for supplying power to the execution module.

Preferably, in the above communication system, the second self-loop device has the same structure as the first self-loop device.

It can be known from the above description that the substation communication system provided by the present invention includes: a first communication channel, a second communication channel, a first self-loop device, and a second self-loop device; wherein, the first communication channel includes: a first in-station device , a first off-site device, and a first communication line connecting the first on-site device and the first off-site device; the second communication channel includes: a second on-site device, a second off-site device, and a connection to the first off-site device A second communication line between the second internal device and the second external device; the first self-loop device is connected to the first external device through the first communication line; and the first self-loop device Connected to the second internal device, in the first working state, the first self-loop device is used to self-loop the first internal device; the second self-loop device communicates with the second communication line The second external device is connected, and the second self-loop device is connected to the first internal device, and in the second working state, the second self-loop device is used to automatically connect the second internal device ring.

When any one of the first communication channel and the second communication channel has a communication interruption fault, the corresponding self-loop device controls the self-loop of the equipment in the station of the communication channel where the interruption occurs, and can self-loop according to the communication channel After the message sending and receiving status of the off-site device confirms that the communication channel is interrupted and faulted, it is an in-station device or an out-of-station device. There is no need to manually conduct on-site self-loop test, which realizes the rapid diagnosis of interruption fault detection and improves the work efficiency. efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

FIG. 1 is a schematic structural diagram of a substation communication system provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of another substation communication system provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a first self-loop device provided in an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a substation communication system provided by an embodiment of the present application, the substation communication system.

The first communication channel includes: a first on-site device 12 , a first off-site device 11 , and a first communication line 13 connecting the first on-site device 12 and the first off-site device 11 .

The second communication channel includes: a second on-site device 15 , a second off-site device 14 , and a second communication line 16 connecting the second on-site device 15 and the second off-site device 14 .

The first self-loop device 17 is connected with the first station external device 11 by the first communication line 13; Then the device 12 in the first station is self-looped.

The first working state is the state when the communication of the second communication channel is normal and the communication interruption of the first communication channel occurs. In the first working state, due to a communication interruption, the first external device 11 sends an abnormal message. At this time, the second in-station device 15 sends the first self-loop driving command and the first test message signal to the first self-loop device 17, and the first self-loop device 17 controls the first self-loop driving command to control the first self-loop device 12 to automatically ring.

If the first external device 11 can receive the first test message signal, it means that the communication between the first communication line 13 and the first external device 11 is normal, and the interruption fault of the first communication channel occurs in the first internal device 12 , that is, the interrupt fault occurs in the station.

Conversely, if the first test message signal cannot be received by the first external device 11, it proves that the communication between the first communication line 13 and the first external device 11 is abnormal, indicating that the first test message signal cannot pass through the first test message signal. The communication line 13 and the first off-station device 11 transmit, and there is an interruption fault in the communication channel part from the first communication line 13 to the first off-station device 11, and it can be judged that the communication interruption fault occurs on the first communication line 13 outside the station, or The first off-site device 11, or between the two, can determine that the communication interruption fault occurs outside the station.

The second self-loop device 18 is connected with the second station external device 14 by the second communication line 16, and the second self-loop device 18 is connected with the first station internal device 12, and in the second working state, the second self-loop device 18 uses Then the device 15 in the second station is self-looped.

The second working state is a state when the communication of the first communication channel is normal and the second communication channel has a communication interruption failure. In the second working state, due to the interruption of communication, the message of the second external device 14 is abnormal. At this moment, the device 12 in the first station sends the second self-loop driving command and the second test message signal to the second self-loop device 18, and the second self-loop device 18 controls the second self-loop driving command to control the second self-loop device 15 to automatically ring.

If the second external device 14 can receive the second test message signal, it means that the communication between the second communication line 16 and the second external device 14 is normal, and the interruption fault of the second communication channel occurs in the second internal device 15 , that is, the interrupt fault occurs in the station.

Conversely, if the second external device 14 cannot receive the second test message signal, it proves that the communication between the second communication line 16 and the second external device 14 is abnormal, indicating that the second test message signal cannot pass through the second test message signal. The communication line 16 and the second external device 14 transmit, and there is an interruption fault in the communication channel part from the second communication line 16 to the second external device 14, and it can be judged that the communication interruption fault occurs on the second communication line 16 outside the station, or The second off-site device 14, or between the two, can determine that the communication interruption fault occurs outside the station.

In the embodiment of the present application, the self-loop is a short-circuit setting, that is, the first self-loop device 17 self-loops the first in-station device 12 to short-circuit the first in-station device 12, and the second self-loop device 18 short-circuits the second in-station device. The 15 self-loop is to short-circuit the device 15 in the second station. Through the corresponding self-loop device, the equipment in the station of the communication channel where the communication interruption occurs is self-looped, so that it can quickly determine whether the interruption occurs inside or outside the station.

When in the first working state, if it is determined that there is a communication interruption failure outside the station of the first communication channel, in order to further determine whether there is a communication interruption failure in the station of the first communication channel, at this time, it is also possible to report to the second station by the device 12 in the first station. The second self-loop device 18 sends the second self-loop driving command and the second test message signal, if the second external device 14 can receive the second test message signal, it means that the communication of the first internal device 12 is normal, that is, the first There is no communication interruption fault in the station in the communication channel, if the second test message signal cannot be received by the second external device 14, it means that the first station device 12 also has a communication interruption fault, that is to say, the first communication channel has an in-station failure at the same time. And out-of-station communication interruption failure.

During the second working state, if it is judged that there is a communication interruption fault outside the station of the second communication channel, in order to further determine whether there is a communication interruption fault in the station of the second communication channel, at this moment, it is also possible to report to the second station by the device 15 in the second station. A self-loop device 17 sends the first self-loop drive command and the first test message signal, if the first test message signal can be received by the first external device 11, it means that the second internal device 15 communicates normally, that is, the second There is no communication interruption fault in the station in the communication channel. If the first test message signal cannot be received by the first external device 11, it means that the second station device 15 also has a communication interruption fault, that is, the second communication channel has an internal communication failure at the same time. And out-of-station communication interruption failure.

Referring to FIG. 2 , FIG. 2 is a schematic structural diagram of another substation communication system provided by an embodiment of the present application. In the implementation shown in FIG. 2 , the first communication channel is a 101 communication channel using the 101 protocol. The second communication channel is a 104 communication channel using the 104 protocol.

The first intra-site device 21 includes: a first switch 211 , a first remote controller 212 and a modem 213 connected in sequence. The first communication line 22 includes: an audio distribution frame 221 connected to the modem 213 through a first uplink channel and a first downlink channel; a first scheduling terminal 222 connected to the audio distribution frame 221 .

The second in-site device 23 includes: a second switch 231 , a second remote control 232 , a real-time switch 233 and a router 234 connected in sequence. The second communication line 24 includes: a communication distribution frame 241 connected to the router 234 through the second uplink channel ⑤ and the second downlink channel ⑥; and a second dispatching terminal 242 connected to the communication distribution frame 241 .

In order to facilitate the first scheduling terminal 222 to test and send and receive data, the first uplink channel and the first downlink channel both include two parallel sub-channels, one sub-channel ① of the first uplink channel is connected with one sub-channel ③ of the first downlink channel , another sub-channel ② of the first uplink channel is connected with another sub-channel ④ of the first downlink channel. Corresponding sub-channels can be connected through switches.

In order to facilitate the second scheduling terminal 242 to test sending and receiving data, the second uplink channel ⑤ is connected with the second downlink channel ⑥. The second uplink channel ⑤ and the second downlink channel ⑥ can be connected through a switch.

One end of the first self-loop device 25 is connected to the second remote machine 232, and the other end is connected to the first out-of-station device 22 through the first uplink channel and the first downlink channel.

One end of the second self-loop device 26 is connected to the first remote engine 212, and the other end is connected to the second external device 24 through the second uplink channel ⑤ and the second downlink channel ⑥.

When a fault occurs at fault point C, the master station sends a self-loop command to the second remote machine 231 through the 104 channel, and the second remote machine 231 sends the first self-loop drive command to the first self-loop device 25, and the channel is automatically ring. At this time, the master station end will be sending and receiving normally, and the message is correct, and it is judged that the fault occurs in the station of the first communication channel. The main station end is the main power station including the first dispatching end and the second dispatching end. The power station including the first in-station device and the second in-station device is a dispatched plant.

When a fault occurs at fault point D, the master station sends a self-loop command to the first remote machine 211 through channel 101, and the first remote machine 211 sends a second self-loop drive command to the second self-loop device 26, and the channel is automatically ring. At this time, the sending and receiving of the master station is still abnormal, and there is no message, and it is judged that the fault occurred outside the station.

In the embodiment of the present application, both inside and outside the station mean that the communication interruption occurs inside or outside the station.

Referring to FIG. 3, FIG. 3 is a schematic structural diagram of a first self-loop device provided in an embodiment of the present application. The first self-loop device 25 includes: a receiving module 31 for receiving a self-loop instruction; for executing a self-loop instruction, An execution module 32 for self-loop control; a power supply module 33 for powering the receiving module 31 and the execution module 32 .

For the first self-loop device 25, its receiving end A is used to connect with the second remote machine 232, and is used to receive the first closed-loop instruction and the second test message signal sent by the second remote machine 232, and its sending end B is used for It is connected to the first communication line 22 .

The second self-loop device has the same structure as the first self-loop device, and also includes: a receiving module for receiving self-loop instructions; an execution module for executing self-loop instructions and controlling the self-loop of devices in the second station; receiving module and A power module that supplies power to the executive module.

In the embodiment of the present application, the receiving module can receive and interpret commands in station protocol messages such as 103 and MMS sent by the corresponding remote machine. Both the device in the first station and the device in the second station have two states: a self-loop state and a normal operation state. The self-loop state is that the normally open node is closed and the normally closed node is disconnected. The normal operating state is that the normally open node is disconnected and the normally closed node is closed. The device in the station switches the state by sending the self-loop drive command and recovery command through the corresponding remote machine.

The command execution module is composed of a two-position relay with multiple normally open and normally closed nodes. The normally closed auxiliary node is connected in series to the corresponding remote motor, and the normally open auxiliary node is connected to the corresponding up channel and down channel. The receiving module interprets the self-loop driving command or recovery command to drive the relay to act, reset, and switch states.

The power module has the functions of voltage stabilization, AC-DC self-adaptation and power supply DC110/220 compatibility.

Before using the self-loop equipment, the corresponding remote control point should be added to the remote machine inside the station, and the corresponding remote control point should also be added to the external device to improve the remote control interface of the terminal. The remote control method is consistent with the conventional remote control, and it needs to communicate with the remote control and self-loop equipment before performing the operation: preset-return to school-execute.

The self-loop equipment can be used in the network structure of the station control layer of the dual network. For example, in a 220kV substation, the provincial dispatcher and the local dispatcher are connected.

In the embodiment of the present application, the audio distribution frame is used to implement functions such as connection, wiring, line adjustment, and transfer of audio lines and communication lines in channel 101. The modem is used to translate the analog signal into a digital signal recognizable by the computer (the data in channel 101 is transmitted through the analog signal), so as to realize the communication between the remote machine in the station and the equipment at the master station. The telemotor is used to modulate and download the signal of the master station to realize functions such as telemetry, remote signaling, remote control, and remote adjustment. The communication distribution frame is used to realize the functions of connecting 2M lines in the station and communication lines outside the station in channel 104, wiring adjustment, transfer and other functions. The router is used to "translate" the data information between different networks or network segments, so that they can "read" each other's data, and realize the communication between the remote machine in the station and the master station device.

It can be known from the above description that the substation communication system described in the embodiment of the present application can realize rapid detection of communication faults in the communication channel, and improve work efficiency.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A substation communication system, characterized in that it comprises: a first communication channel, a second communication channel, a first self-loop device and a second self-loop device; wherein, The first communication channel includes: a first on-site device, a first off-site device, and a first communication line connecting the first on-site device and the first off-site device; The second communication channel includes: a second on-site device, a second off-site device, and a second communication line connecting the second on-site device and the second off-site device; The first self-loop device is connected to the first external device through the first communication line; and the first self-loop device is connected to the second internal device, and in the first working state, the The first self-loop device is used to self-loop the device in the first station; The second self-loop device is connected to the second external device through the second communication line, and the second self-loop device is connected to the first internal device. In the second working state, the The second self-loop device is used for self-looping the second in-station device. 2. The substation communication system according to claim 1, wherein the first communication channel is a 101 communication channel using the 101 protocol; The second communication channel is a 104 communication channel using the 104 protocol. 3. The substation communication system according to claim 2, wherein the device in the first station comprises: a first switch, a first remote machine and a modem connected in sequence; The first communication line includes: an audio distribution frame connected to the modem through a first uplink channel and a first downlink channel; a first scheduling terminal connected to the audio distribution frame. 4. The substation communication system according to claim 3, wherein the first uplink channel and the first downlink channel both include two parallel sub-channels; One subchannel of the first uplink channel is connected to one subchannel of the first downlink channel; another subchannel of the first uplink channel is connected to another subchannel of the first downlink channel. 5. The substation communication system according to claim 3, characterized in that, the second in-station device comprises: a second switch, a second remote machine, a real-time switch and a router connected in sequence; The second communication line includes: a communication distribution frame connected to the router through a second uplink channel and a second downlink channel; and a second dispatching terminal connected to the communication distribution frame. 6. The substation communication system according to claim 5, wherein one end of the first self-loop device is connected to the second remote machine, and the other end passes through the first uplink channel and the first downlink A channel is connected to the first off-site device. 7. The substation communication system according to claim 5, wherein one end of the second self-loop device is connected to the first remote machine, and the other end passes through the second uplink channel and the second downlink channel connected to the second off-site device. 8. The substation communication system according to any one of claims 1-7, wherein the first self-loop device comprises: a receiving module for receiving a self-loop instruction; for executing the self-loop instruction, An execution module for performing self-loop control; a power supply module for supplying power to the receiving module and the execution module. 9. The substation communication system according to any one of claims 1-7, wherein the second self-loop device has the same structure as the first self-loop device.