Method for accurately controlling timing switching value output of distributed system

Abstract

The invention discloses a method for accurately controlling timing switching value output of a distributed system. The method comprises the following steps: acquiring a PPS interval through a hard bussynchronizing signal; calculating local crystal oscillator deviation; obtaining a relative time difference and an outlet state of a timing switching value output; calculating the time difference between the timing outlet of an outlet board card and the PPS moment; and triggering the timing switching value output during timing interruption or according to a timer function. According to the methodfor accurately controlling timing switching value output by a distributed system, the limitation that the control board card must perform direct I / O control on an outlet relay can be broken through,the control precision of the timing exit is ensured through the inter-board communication mechanism and the cooperative cooperation between the board cards, and a solution is provided for an application scene needing accurate timing exit.

Description

technical field [0001] The invention relates to a method for accurately controlling the output of a timing switching value, in particular to a method for accurately controlling the output of a timing switching value in a distributed system, belonging to the technical fields of power grid control and industrial control. Background technique [0002] In the field of power grid control and industrial control, there are application requirements that require timing switch output control. For example, in the field of power grid secondary control, circuit breaker phase selection control equipment needs to achieve precise time output in a specific phase, etc. [0003] With the development of processor technology and embedded control technology, the control unit mostly adopts distributed, standardized and modularized ideas for board design. In the distributed system, the control board realizes information interaction with the outlet board through the backplane communication bus to co...

AI Technical Summary

Problems solved by technology

The accuracy of export control will be affected by factors such as information exchange message transmission delay, export board program control output interruption interval, etc., which reduces the time accuracy of control

[0004] In order to ensure the control accuracy, the conventional method is that the control board must realize the direct I / O control of the export relay. This method has limitations such as a large number of wiring, and a small number of control export boards and output nodes.

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