Real-time control system for intelligent controller

Abstract

The invention relates to a real-time control system for intelligent controller software, in particular to a foreground and background real-time control system with fixed cycle period. The real-time control system for an intelligent controller comprises foreground event treatment and background task treatment, of which the tasks are separated; the background task treatment is not responsible for AD sampling treatment, and only responsible for task treatments of computation, protection, releasing execution, keyboard display and the like; and the foreground event treatment is responsible for the asynchronous event treatments of timing interruption, AD sampling interruption and communication interruption, and ensures that the cycle period of the background task treatment is equal to the period of a power grid. The background task treatment is a multi-task execution control method, ensures the periodical execution of important tasks, preferential execution of sudden tasks, idle execution of secondary tasks and the like, and can realize the single-task batching multi-period execution aiming at the long-period tasks. The real-time control system is better than the prior art, and is high in control precision, and the control information of the real-time control system is difficult to lose.

Description

technical field [0001] The invention relates to an intelligent controller software real-time control system, and further relates to a fixed cycle period front and back real-time control system, especially suitable for a universal air circuit breaker (ACB) controller. Background technique [0002] In the application of universal air circuit breaker (ACB), the software control system of its intelligent controller is extremely complicated. Its software design block diagram is as follows figure 1 As shown, it generally includes current and voltage sampling, grid parameter calculation, protection judgment, action tripping, adjustment knob input, keyboard display, communication module, fault alarm record, clock module, etc. [0003] The intelligent controller is the core control component of the ACB intelligent circuit breaker. The quality of its software control system design is related to the stability and reliability of the ACB intelligent circuit breaker, and it is also relat...

AI Technical Summary

Problems solved by technology

However, the design of this method is complex, and the memory takes up too much space. Only 12 signals are collected in one grid cycle, and the protection accuracy may be too low; tasks must be scheduled 12 times in each cycle, and a lot of time is spent on task stack protection and data storage. Increase the CPU workload; and process a large number of protection and calculation tasks in an AD interrupt service program, which may occupy a large amount of CPU time, which will lead to the loss of other foreground asynchronous events such as high-speed communication events

[0006] To sum up, the cycle period of the simple front-end and back-end design method is greater than the power grid cycle, resulting in the loss of power grid information and protection lag; while the design of the real-time operating system RTOS is complicated, and it is difficult to improve the protection accuracy (adequate sampling points) Reach a balance with the time wasted by the scheduling algorithm

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