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Method for transmitting dynamic process data of power networks in data acquiring-monitoring systems

A dynamic process and monitoring system technology, applied in the transmission system, signal transmission system, electrical signal transmission system, etc., can solve the problems of inability to dispatch operators to provide power grid dynamic process, impossible data transmission, etc.

Inactive Publication Date: 2009-08-26
苏盛
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Problems solved by technology

However, due to the limitation of the network communication bandwidth of the data acquisition and monitoring system, it is impossible to send all the data including the dynamic process information of the power grid in the remote data acquisition terminal to the control center. The current power grid data acquisition and monitoring system can only The state of the power grid is displayed with a certain instantaneous data refresh cycle in the data refresh cycle of the monitoring object, so it is not possible to provide dispatching operators with information about the dynamic process of the power grid during disturbances

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  • Method for transmitting dynamic process data of power networks in data acquiring-monitoring systems
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  • Method for transmitting dynamic process data of power networks in data acquiring-monitoring systems

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Embodiment Construction

[0012] Such as figure 1 The simulation uses WEPRI 36-node grid graph. In this figure, the power system simulation analysis software is used to perform the power system transient simulation when a three-phase short-circuit fault occurs in the power grid and the fault is cleared. A metallic three-phase short-circuit fault occurred on the line between 30 nodes and 31 nodes at 0.01 second, and then the fault was removed at 0.1 second. The voltage data of 31 nodes obtained by simulation is output in steps of 10 milliseconds, and the voltage data are respectively processed by the existing data acquisition and monitoring system working method and the method proposed in this patent to show that the method of this patent is showing the power grid Effect on dynamic process information.

[0013] figure 2 It is a comparison chart of the voltage fluctuation displayed every 3 seconds and the actual voltage dynamic process of 31 nodes on the existing data acquisition and monitoring system. Am...

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Abstract

The invention discloses a method for transmitting dynamic process data of power networks in data acquiring-monitoring systems. The method comprises the following steps that: by performing lossy or lossless compression or sampling on data in a measurement period on RTU and other remote data acquisition terminals, a small amount of data is extracted to record the dynamic information of a system in the period; the extracted data is transmitted to a control center; and a dynamic process is reconstructed and displayed according to received data. The method has the advantages that the method remarkably reduces the amount of data extracted from dynamic process data in a data refreshing cycle, can characterize the data of dynamic process information, overcomes the problem that the prior system is low in the speed of refreshing monitoring information and incapable of accurately reflecting the dynamic changes of the power networks, can greatly lower the requirement on the bandwidth of communication systems, and can realize the real-time dynamic information transmission of power systems on the prior system.

Description

Technical field [0001] The invention relates to power system dispatching automation technology, in particular to a transmission method of power grid dynamic process data in a power system data acquisition and monitoring system (SCADA). Background technique [0002] Supervisory Control and Data Acquisition (SCADA) is a monitoring system that accompanies the development of computer and communication technology. It is widely used in many fields such as electricity, water supply, petroleum, chemical, gas, and process control. Among them, it is most commonly used in power grid dispatching. It uses Remote Terminal Unit (RTU) installed in power plants and substations to feed back the status information (current, voltage, frequency, line flow, switching status, generator power angle, etc.) of the monitored object—the power grid to the control. The center, alarms abnormal conditions, and provides help for dispatchers in decision-making and implementation control. Generally speaking, when ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H03M7/30G08C19/16
Inventor 段献忠苏盛
Owner 苏盛
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