Simulation closed-loop test method for layered distributed wireless network of intelligent transformer station

Abstract

The invention relates to a simulated closed-loop test method for the layered distributed wireless network of an intelligent transformer station. A simulation data processing controller is provided; the simulation data processing controller obtains the stable operation state of the power system and the sequential solution of the fault dynamic process, a simulation model of the intelligent transformer station is simulated in the time domain, and simulation data is transmitted to a primary host which is connected with the simulation data processing controller via a wireless network card; the primary host is connected with a second host via a wireless network bridge, the primary host and the secondary host are used for synchronous time service, and the simulation data processing controller makes data interaction with a simulation terminal, which is connected with the secondary host via a wireless network bridge, via the primary host and the secondary host; and the simulation data processing controller receives the analog input amount or GOOSE state quantity uploaded via the simulation terminal, and thus switches the corresponding data and controls output data via a preset state sequence, so that closed-loop simulation test is realized.

Description

technical field [0001] The invention relates to system-level control and detection under distributed networking of intelligent substations, in particular to a simulation closed-loop testing method for layered distributed wireless networking of intelligent substations. Background technique [0002] With the expansion of the scope of smart substation systems and the development of decentralized control, system-level simulation testing has gradually become the development trend of smart substation debugging. The system-level simulation test first needs to synchronize the time among the distributed control nodes. There are generally two different types of applications in which time is used in systems: time-stamped applications and frequency-based applications. The purpose of time synchronization is to accurately transmit the time reference to each control point. The transmission is not difficult, but the difficulty in achieving is the accuracy of the transmission. [0003] In ...

AI Technical Summary

Problems solved by technology

Although the wired method can achieve us-level synchronization accuracy of different device clocks, it requires a lot of wiring before use, which brings inconvenience to large-scale and mobile use; there are currently two wireless methods. The first method uses wireless time synchronization combined with a high-precision constant temperature crystal oscillator mechanism. That is, before each simulation test, one-to-one wireless time pairing between the master and slave clocks is performed, and then the high-precision constant temperature crystal oscillator is used to keep time

This method has low synchronization accuracy and short sustainable time; method 2 installs GPS on each device and uses GPS to serve time, which has high synchronization costs, limited installation, and poor usability, etc.

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