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Method for measuring transmission time-delay of telemechanical system by GPS

A transmission delay, telecontrol system technology, applied in the field of satellite positioning systems, can solve problems such as inaccuracy, achieve high measurement accuracy, meet the needs of engineering volume accuracy, and avoid errors

Inactive Publication Date: 2005-03-23
EAST CHINA GRID
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Problems solved by technology

In recent years, the monitoring system construction of large-scale power stations and power plants has replaced traditional RTU devices. The complexity of the system structure and the large number of information transmission interfaces have made people pay more and more attention to the real-time problem of information transmission. Signals are transmitted by complex transmission systems. The longer the delay, the more unfavorable it is for the main control department to quickly take control measures. Therefore, a time delay standard is stipulated for the signal transmission system. However, there is no scientific method for how to check the delay time of the system. Use a stopwatch and use a password to measure the signal delay time between the power station and the main control station through the phone, which is very inaccurate

Method used

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  • Method for measuring transmission time-delay of telemechanical system by GPS
  • Method for measuring transmission time-delay of telemechanical system by GPS
  • Method for measuring transmission time-delay of telemechanical system by GPS

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Embodiment Construction

[0013] Please refer to the attached figure 1 , 2 As shown, the signal generator 1 outputs two signals, one is a sawtooth wave, the other is a square wave, the square wave and the clock signal 11 of the GPS satellite positioning receiver are input to the dual-track oscilloscope 2, the lower edge of the square wave and the sawtooth wave The falling edge is synchronized. On the dual-track oscilloscope 2, the falling edge of the square wave can be seen as t on the time axis of the oscilloscope. 0 , The clock pulse of GPS corresponds to t on the time axis s , The difference between the two is t s -t 0 =Δt, the ramp down time of the sawtooth wave transmitted from the starting end is measured at the terminal as t s1 , So that the modulus change propagation delay is t s1 -t s +Δt. The state quantity displacement delay test is to use the minute synchronization output signal of the GPS receiver to trigger the analogue state quantity displacement and access the input module through the outp...

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Abstract

A delay time method for measuring motion system. The invention adopts the reception technique of GPS to measure the delay time of the system. The time delay test of analog quantity change use the signal generator to simulate the export of transmitter and access input module; use the spring down of the signal of saw tooth wave; record the moment when the change of big data occur in the monitoring and data collecting system library, which is the delay time of the system analog quantity diversification and transmission.

Description

Technical field [0001] The invention relates to a method for measuring the transmission delay of a motion system by using a satellite positioning system. It is mainly used for a signal of a sudden accident in a power station between a large-scale electric (plant) station and a main control station to be transmitted to the main control station for a delay. Time, so that the master station can respond quickly and take corresponding control measures. The delay time requirement is as small as possible. It is an important indicator for checking whether the transmission device meets the standard. Background technique [0002] With the rapid development of computer technology, the motion device of the power system has developed from the original centralized remote terminal device to the later distributed RTU. In recent years, the construction of monitoring systems for large power stations and power plants has replaced traditional RTU devices. The complexity of the system structure and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/00
Inventor 岑宗浩
Owner EAST CHINA GRID
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