CN102868223B - Circuit offside information is utilized to improve the anti-method of this side transformer station five - Google Patents

Abstract

The invention relates to a method for improving the five defenses of the local substation by using the information on the opposite side of the line. An Ethernet plug-in is added to the remote communication machine of each substation, and the master station assigns an IP address to the newly added Ethernet card of the remote communication machine. address, so that the telecontrol communicator of the substation can receive the data issued by the master station; the method is as follows: the telecontrol communicator of the substation on this side sends an instruction to the master station, calls the master station to transmit the line knife switch position information of the opposite substation, And the position information of the line knife switch is used as one of the conditions for judging the position of the line knife on the local side in the five-defense logic judgment of the local substation. The present invention judges the position of the switch on the local side by obtaining the position information of the switch of the substation on the opposite side from the main station, and can improve the safety performance of the five-proof operation.

Description

The method of improving the five defenses of substations on the local side by using the information on the opposite side of the line

technical field

The invention relates to a method for five defenses of a substation based on an intelligent five defense system, in particular to a method for improving the five defenses of a substation on the local side by using information on the opposite side of a line.

Background technique

At present, the five-defense system of the smart substation collects the position information of switches and switches inside the substation on the local side, as well as the real-time power telemetry information, as the condition for the five-defense logic judgment. Since current and voltage combined electronic transformers are generally used in smart substations to collect information such as the switch on the local side and the position of the line switch, there is no independent line voltage change information. It is used to judge whether there is voltage on the line, and there is a certain degree of uncertainty in obtaining the information on the local side through the induction method, which makes the five-proof logic judgment of the smart substation have certain hidden dangers. As shown in Fig. 1, the lines of substations A and B are respectively connected with bus-side switches 1a, 2a and 1b, 2b, switches 3a and 3b, line switches 4a and 4b, and line ground switches 5a. As shown in Figure 2, when substation A performs the five-prevention logic judgment of the line ground knife 5a knife switch closing operation, two conditions must be met: one is that the three-phase voltage of lines A, B, and C has no power, and the other is that the line knife switch 4a points. Since the electronic transformer usually adopts a combined electronic transformer, the installation position of the line pressure change of the smart substation is different from that of the traditional substation, not on the line side, so it cannot judge whether there is voltage on the line, and the sensing method has weather and sensing sensitivity Influenced by other factors, false induction may occur, which brings danger to the closing operation.

Contents of the invention

The purpose of the present invention is to address the deficiencies of the prior art, and provide a method for improving the five defenses of the local substation by using the information on the opposite side of the line, which can conveniently confirm whether there is voltage in the line interval of the substation, and improve the safety performance of the five defenses of the substation.

The present invention is realized based on the following idea: at present, the automatic master station of the electric power system stores information such as the switch of the opposite substation, the position of the line knife switch, and the like. If the position information of the line knife switch of the substation on the opposite side in the main station can be transmitted to the substation on the local side, the position information of the line knife switch on the substation on the opposite side can be used as the location information on the line side of the local substation in the five-defense logic judgment of the local substation. One of the conditions of the knife position is not only safer, but also easier to identify.

According to the above ideas, the present invention adopts the following technical solutions: including dispatch automation master station and intelligent substation as a substation, the master station and the substation communicate through the IEC104 protocol; add a piece of Ethernet to the telecontrol communication machine of each substation Network plug-in, the master station assigns an IP address to the newly added Ethernet card of the telecontrol communicator, so that the substation telecontrol communicator can receive the data sent by the master station;

The method is as follows: the telecontrol communication machine of the local substation sends an instruction to the main station, calls the main station to transmit the line knife switch position information of the opposite side substation, and uses the line knife switch position information as the five-defense logic judgment of the local substation It is one of the conditions for judging the position of the ground knife on the local line. If the position of the line knife switch of the opposite substation is disconnected, it will display that the opposite line is disconnected, and it can be judged that the line is in a no-voltage state, and the five-proof logic judgment operation can be passed, otherwise the operation is not allowed.

In order to obtain more information about the substation on the opposite side and improve the safety performance of the five-defense operation on the local side, the telecontrol communicator of the substation on the local side also calls the main station to transmit the switch and power information of the substation on the opposite side, and transfers the switch of the substation on the opposite side and power information as the conditions for the logic judgment of the five defenses on this side.

In the present invention, an Ethernet plug-in is added in the intelligent substation, so that the substation as a substation has the function of sending instructions from the terminal, and can obtain relevant information of the opposite substation from the main station, especially the position information of the circuit knife switch, which can effectively compensate for the local side. The substation relies solely on electronic transformers to obtain information, which greatly improves the safety performance of the five-proof operation of the local substation, and the identification operation is very convenient.

Description of drawings

Figure 1 is a schematic diagram of two substation line interval wiring;

Figure 2 is a block diagram of five defense logic judgments in smart substations;

Fig. 3 is a schematic diagram of the principle of data transmission in the present invention;

Fig. 4 is a block diagram of logical judgment of five defenses in the intelligent substation of the present invention.

Detailed ways

Add an Ethernet plug-in to the telecontrol communicator in the smart substation, and assign an IP address to the newly added Ethernet card, so as to configure a new channel for sending information from the master station to the substation, so that the distance between the telecontrol communicator and the master station Two-way communication can be carried out according to the IEC104 protocol. That is: as shown in Figure 3, each substation, that is, substations A and B, uploads the information of the substations on its own side to the master station according to the IEC104 protocol, and the master station can also send the information stored in the master station to substations A and B respectively according to the IEC104 protocol. information.

Taking substation A as an example, it calls the main station through the IEC104 protocol to obtain the telemetry and telesignaling information of substation B. In the forwarding process, it is equivalent to using substation A as the main station to receive information, and the main station as a substation to upload the corresponding telemetry and telesignaling information of the opposite substation B. The telecontrol communication machine of substation A receives the corresponding telemetry and telesignal information of substation B on the opposite side forwarded by the main station, and analyzes it. The analyzed data is sent to the monitoring system, and the monitoring system includes the collected information including the line of substation B on the opposite side. The position information of the switch 4b, the position information of the switch 1b and 2b on the bus side, and other current and voltage information flowing through the switch 3b are used as the conditions for the logic judgment of the background five defenses.

The judgment process is shown in Figure 4. On the basis of the original five-proof logic judgment block diagram, the position of the line knife switch 4b of the opposite substation is added. When 4b is disconnected, it can be determined that the line has no power, so that it will not cause a charged and grounded knife switch, which increases the reliability of the five-proof sex.

The dotted line in Fig. 4 is that the local substation collects the position information of the busbar side switch 1b, 2b of the opposite substation, and the current and voltage information flowing through the switch 3b, as a supplementary condition for the five-proof logic judgment operation of the local side, which can further improve its safety performance.

Claims (2)

1. Use the information on the opposite side of the line to improve the five-defense method of the local substation, including dispatching the automation master station and the intelligent substation as a substation. The communication between the master station and the substation is carried out through the IEC104 protocol; its characteristics are: in each substation An Ethernet plug-in is added to the telecontrol communicator, and the master station assigns an IP address to the newly added Ethernet card of the telecontrol communicator, so that the substation telecontrol communicator can receive the data sent by the master station; The method is as follows: the telecontrol communication machine of the local substation sends an instruction to the main station, calls the main station to transmit the line knife switch position information of the opposite side substation, and uses the line knife switch position information as the five-defense logic judgment of the local substation It is one of the conditions for judging the position of the ground knife on the local line. 2. The method for improving the five defenses of the local substation by using the opposite side information of the line according to claim 1, characterized in that: the remote communication machine of the local substation calls to the main station to transmit the switch and power information of the opposite substation, and sends The switch and power information of the substation on the opposite side are used as the conditions for the five-defense logic judgment of the substation on the local side.