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Triggered logic calculation method for substation automation system

A substation automation and logic computing technology, applied in computing, memory systems, program control design, etc., can solve problems such as inability to capture, achieve the effects of improving utilization, reducing system load, and improving system operating efficiency

Active Publication Date: 2017-08-29
NARI TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of regular scanning cannot capture these time scales

Method used

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  • Triggered logic calculation method for substation automation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In11 signal changes from 0 to 1;

[0035] The publishing unit sends the signal to the subscribing unit;

[0036] The subscription unit searches and finds that the signal is involved in logic calculation, and puts the signal into the signal queue to be processed;

[0037] After the logic calculation unit gets the signal, it retrieves the logic formula that needs to be calculated. After searching, it finds that the formula OUT1 needs to be calculated. When the formula OUT1 is calculated, the value of OUT1 changes from 0 to 1.

Embodiment 2

[0039] If the two signals In21 and in22 change from 0 to 1 successively;

[0040] The publishing unit sends these two signals to the subscribing unit;

[0041] The subscription unit searches and finds that these two signals are involved in logic calculations, and puts these two signals into the signal queue to be processed;

[0042] The logic calculation unit first gets the signal of in21, and retrieves the logic formula that needs to be calculated. After searching, it is found that the formula OUT2 needs to be calculated, and the value of OUT2 is still 0 when the formula OUT2 is calculated;

[0043] The logic calculation unit then gets the signal of in22 to retrieve the logic formula that needs to be calculated. After searching, it is found that the formula OUT2 needs to be calculated. When the formula OUT2 is calculated, the value of OUT2 is still 0.

Embodiment 3

[0045] Following Example 2, the In23 signal changes from 0 to 1;

[0046] The publishing unit sends the signal to the subscribing unit;

[0047] The subscription unit searches and finds that the signal is involved in logic calculation, and puts the signal into the signal queue to be processed;

[0048] After receiving the signal, the logic calculation unit retrieves the logic formula that needs to be calculated. After searching, it is found that the formula OUT2 needs to be calculated, and the formula OUT2 is calculated, and the value of OUT2 changes from 0 to 1 at this time.

[0049] and so on.

[0050]Due to the use of this trigger mechanism, the logic calculation unit only needs to calculate the logic calculation formula of the change of the relevant variable, instead of calculating all the logic calculation formulas like the scanning method, and only processes and calculates one change signal at a time, so the result The time scale of the changing signal can be easily a...

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Abstract

The invention discloses a triggered logic calculating method for a substation automatic system. The method comprises the steps of collecting change signals generated in a system through a change signal issuing unit, and issuing the change signals attached with a signal generating time scale into an information bus of the system; subscribing the change signals from the information bus of the system through the change signal subscribing unit, screening the signals in accordance with a variation in a logic calculating formula, discarding unnecessary signals, and storing the needed signals in a to-be-processed signal queen; taking out signals from the to-be-processed signal queen through the logical calculating unit, looking up the signal in the logic calculating formula, and logically calculating the logic calculating formula if the variation in the logic calculating formula includes the signal; adopting the time scale when the signal occurs as the time scale of a calculating result, and finally transmitting the calculating result to the information bus of the system. According to the method provided by the invention, by adopting a triggering mechanism, system resources can be fully used when mass data are calculated, and the operating efficiency of the system can be improved effectively.

Description

technical field [0001] The invention belongs to the technical field of substation automation, and in particular relates to a trigger logic calculation method for a substation automation system. Background technique [0002] In the substation automation system, it is necessary to carry out logical calculations on the collected data, and the calculation results generate some new data to serve some advanced applications or meet certain requirements. Logic calculation (AND, OR, NOT, XOR, etc.), used to combine one or more signals into one signal according to the specified logic operation mode. [0003] At present, the common practice in the substation automation system is to realize it by regularly scanning the real-time database. The logic calculation module accesses the real-time database to obtain the values ​​of one or more signals involved in the calculation, and then calculates a new value from these values ​​according to the specified calculation method. [0004] This m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/305
Inventor 李照国王海峰潘洪湘张海滨
Owner NARI TECH CO LTD
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