Self-adaptive control method and device for data transmission of telecontrol device

Abstract

The invention discloses a self-adaptive control method and device for data transmission of a telecontrol device. The control method comprises the following steps: S1, when a target telecontrol deviceis powered on, initializing a data sending interval, starting a server in the target telecontrol device to establish connection with a client, and continuously adjusting the data sending interval by taking an initial value of the data sending interval as an initial value until an initial optimal value is obtained; S2, when the target telecontrol device is operated, starting a server in the targettelecontrol device to establish connection with the client, continuously adjusting the data sending interval by taking the initial optimal value of the data sending interval as an initial value according to the current channel transmission state in real time until a real-time optimal value is obtained, and controlling the target telecontrol device to send data according to the real-time optimal value of the data sending interval. The method is advantaged by simple implementation, capability of achieving self-adaption and dynamic control over the sending rate of the telecontrol device, high control efficiency, good control performance and the like.

Description

technical field [0001] The invention relates to the technical field of electric power telecontrol systems, in particular to an adaptive control method and device for data transmission of telecontrol devices. Background technique [0002] In the power telecontrol system, the telecontrol device (telecontrol communication device) communicates to collect and summarize the data of various equipment in the substation, and then organizes it into a standard format and sends it to the power grid dispatching and monitoring system, and at the same time receives the control of the dispatching terminal command, and after analysis, it is accurately issued to the corresponding device for precise control, such as figure 1 shown. The typical software architecture principles of telecontrol devices are as follows: figure 2 As shown, it mainly includes a communication management application program and a parameter configuration application program. The network communication server and serial...

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Problems solved by technology

[0003] The network channel of the remote control device at the power grid dispatching monitoring center and the substation station generally adopts the IEC104 (IEC60870-5-104) protocol for data interaction, and the IEC104 protocol message is transmitted through the TCP / IP network protocol, and its data transmission rate is mainly affected by the remote The processing delay of the monitoring system and the remote control device, the processing delay of the intermediate network equipment, and the transmission delay of the intermediate network are affected by three aspects. The TCP sending buffer data is full due to the failure to forward the data in time. If the socket is set to work in the blocking mode, the telecontrol system will enter sleep and wait for the data to be written, so that other data collection and command control cannot be processed during the blocking time. It will affect the real-time performance of the entire system; if the socket is set to work in non-blocking mode, the telecontrol system will send an operation return error and will actively disconnect, which will cause frequent reconnections of the communication system, so the reliability of the telecontrol device communication has a great impact on The entire telecontrol system is of great significance

[0004] For the control of the transmission rate of the telecontrol device, at present, the minimum period of the message transmission interval is generally set artificially and the size of the transmission buffer is dynamically adjusted. However, the method of using a fixed interval period will increase the debugging time. If the setting makes IEC104 If the communication processing rate of the server is too low, the communication bandwidth of the scheduling data network will be wasted, and the update of the scheduling monitoring data will be slow. If the communication processing rate is too high, the communication will be disconnected and reconnected frequently, which will affect the communication quality, and the interval period method cannot be matched. The communication transmission performance of the telecontrol communication system can be dynamically adjusted. When the communication transmission performance of the telecontrol communication system is good and the bandwidth margin is large, using a higher data transmission rate can improve the transmission performance. When the transmission performance is poor and the socket sending buffer area is easy to be full, it is necessary to use a lower data sending rate to ensure transmission reliability. The above-mentioned method of using a fixed interval period cannot adapt to changes in the communication performance of the telecontrol communication system, and it is difficult to maintain better communication performance. ; At the same time, after the fixed setting and dynamic adjustment of the sending buffer size, there is still the possibility that it is difficult to completely avoid the buffer being full

[0005] In the prior art, another transmission rate control method of the telecontrol device is to directly use the bandwidth test function to calculate the transmission rate, but simply using the bandwidth test function to calculate the transmission rate will increase the complexity of the software and cannot actually achieve accurate measurement, and the measurement is complex and accurate. Low

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