RU2756430C1 - Method for controlling a computing module of an automation system - Google Patents

Abstract

FIELD: computing module controlling methods.

SUBSTANCE: invention relates to a method for controlling a computing module of an automation system. The method comprises: (I) obtaining by an additional computing module (4) a list of automation functions to be performed by the computing module (3); (II) determination, by means of an additional computing module (4), for each automation function, the time delay value that is used in the algorithm for performing the automation function; (III) ranking of automation functions by means of an additional computing module (4) according to the criterion of increasing time delay; computing module (4) according to the criterion of increasing the time delay; (IV) installation by means of an additional computing module (4) start timers and execution of automatic functions by means of computing module (3) in the following order: automatic functions acting on equipment shutdown and transmitting control commands without time delay, automation functions related to redundancy of control failure equipment, and automation functions that have a time delay before applying the control action, in order of increasing time delay.

EFFECT: optimization of the automation functions.

3 cl, 4 dwg

Description

[01] Technical field

[02] The invention relates to methods for controlling the operation of computing devices used in automated systems of an industrial enterprise.

[03] State of the art

[04] The solutions currently used for managing computing devices provide for such actions as parallelization of calculations, when calculation functions are distributed among several nodes according to certain criteria, input and preparation of initial data for calculation, calculation, collection of calculation results, as well as interaction with monitoring, control and external control systems. Such control is associated with the need to use relatively large computing power of microprocessor relay protection devices, which increases the load and reduces the speed of solving problems.

[05] In US patent US 5771374, 23.06.1998 (the closest analogue) describes a method for implementing the operation of a dispatch control and data collection system using a control controller. The specified controller determines the composition of functions that must be performed in accordance with the specified settings and implements the launch of functions taking into account the specified values of the holding time. The controller has a number of event inputs connected to the interrupt buffer and a cyclic buffer containing sequential interrupt storage locations. When an event signal arrives at the controller input and interrupts are generated, they are stored in a circular buffer and the buffer indicator is inserted in a new location determined by the event. In this case, the dwell time is determined and a location in the offset of the buffer corresponding to a predetermined increasing time window is selected in accordance with the dwell time. This method implements the cyclical execution of the automation function and cannot be used to implement the operation of systems in which the composition of functions changes during operation. At the same time, the analog does not solve the problem of increased computational load on the microprocessor device (computational module) of the controller.

[06] Disclosure of the essence of the invention

[07] The technical problems to be solved by the claimed invention are the high load on the computing module, low efficiency of resource use, and insufficient performance.

[08] The technical result of the claimed method is to reduce the load on the computing module of the automation system with a variable composition of functions, increase the efficiency of using computing resources and the speed of operations.

[09] The specified technical result is achieved in the claimed invention due to the fact that the method for controlling the computing module of the automation system, including the following steps:

[010] (I) obtaining, by the additional computing module, a list of automation functions to be performed by the computing module;

[011] (ii) determining, by means of an additional computing module, for each automation function, the amount of time delay that is used in the algorithm for performing the automation function;

[012] (iii) ranking the automation functions by means of an additional computing module according to the criterion of increasing time delay;

[013] (IV) setting, by means of an additional computing module, start timers and execution by means of the computing module of the automation functions in the following order: - automatic functions acting on equipment shutdown and transmitting control commands without time delay; - automation functions related to redundancy of equipment control failure; - automatic functions with a time delay before applying the control action, in order of increasing time delay.

[014] In the particular case of the implementation of the invention at step (IV) when setting the start timers, if the automatic function, in addition to control signals, has intermediate blocking and / or braking and / or acceleration signals of other automatic functions, the order of its execution is determined based on the time giving the first of the signals. Such signals are stored in the event buffer with a time stamp equal to the time stamp of the measurement signal received from the buffer. In addition, in the particular case of the implementation of the invention, stage (I) of obtaining a list of automation functions is carried out continuously.

[015] Brief Description of the Drawings

[016] The invention is illustrated by the figures, where

[017] FIG. 1 shows a schematic diagram of a system for implementing the claimed method,

[018] FIG. 2 shows a time diagram of the process of starting the functions before the triggering element is triggered,

[019] FIG. 3 shows a timing diagram of the process of starting functions when the trigger is triggered,

[020] FIG. 4 shows a timing diagram of the process of starting functions after a time delay.

[021] Elements in the figure are designated by the following reference numbers:

1 - a device that controls the composition of the functions performed;

2 - control controller;

3 - computing module;

4 - additional computing module;

5 - communication module;

6 - communication devices with control objects.

[022] Implementation of the invention

[023] The claimed method can be implemented using the control system shown in figure 1. The system includes a device that controls the composition of the performed automation functions (1), a control controller (2) and communication devices with control objects (6). The control controller (2) includes a main computing module (3) (hereinafter referred to as a computing module), an additional computing module (4) associated with a device (1) and a module (3), as well as a communication module (5), associated with the module (3) and devices (6).

[024] Device (1) can be a computing device (can be represented by a computing module as part of another device) that interacts over a local area network with other devices such as (1), (2) and (6) to determine the composition of each device (2) of automation or protection functions and is intended to form a list of performed automation functions. The computing module (3) is a microprocessor device that starts the automation functions. An additional computing module (4) is also a microprocessor device that processes these functions and sets the priority of their execution in order to reduce the load on the computing module (3). The communication module (4) is designed to transmit control signals from the controller (2) to the control objects. Communication devices (6) provide interface of the system directly with each of the controlled objects (equipment).

[025] The claimed method includes the following steps:

[026] I). Device (1) determines the composition of automation functions that must be performed in accordance with the algorithm for distributing automation functions among available automation devices (the description of the algorithm is beyond the scope of the patent), and transfers data to an additional computing module (4).

[027] II). An additional computing module (4) for each automation function determines the time delay values that are used in the algorithm for performing the automation function.

[028] III). An additional computing module (4) ranks the automation functions according to the criterion of increasing time delay.

[029] IV). Using an additional computing module (4), the timers for starting the automation functions are set in the following order:

[030] - first, the automatic functions are selected that act to turn off the equipment and transmit control commands without delay (for example, the first stage of distance protection (DZ), the 1st stage of overcurrent protection (MTZ); current cutoff, etc.).

[031] - further, the automation functions related to redundancy of equipment control failure (breaker failure redundancy device, CBFP) are implemented; and

[032] - then the automatic functions follow, having a time delay before applying the control action in order of increasing time delay (for example, the second and next stages of distance protection, the second and next stages of overcurrent protection, automatic fault location (Fault), automatic reclosing (APV) lines, etc.).

[033] If the automatic function, in addition to the equipment control signals, has intermediate signals for blocking, braking or accelerating other automatic functions, the order of its execution is selected based on the time of the first of the signals.

[034] The received signals from the functions are transmitted in the form of control commands to the objects of the system through the module (5) and the device (6) of influence for the implementation of the functions of automation.

[035] In this case, the processes of receiving and processing data by the module (4) occur continuously (in a dynamic mode), which makes it possible to control the computing module (3) of the automation system, in which the composition of the functions performed changes during operation.

[036] An example of the implementation of the method

[037] The invention is illustrated by the example of a system of relay protection and automation of overhead and cable lines with one-way power supply. The device (1) transmits to the additional computing module (3) the list of automation functions:

[038] The protection and automation device is commanded to perform the following set of functions.

[039] 1) Relay protection functions designed to prevent damage to equipment due to short circuits in the electrical network:

[040] - Distance protection (DZ) (1, 2, 3 steps),

[041] - Overcurrent protection (overcurrent protection) (1, 2, 3 stage),

[042] 2) Automation functions designed to ensure uninterrupted operation of the power system after emergencies:

[043] - circuit breaker failure backup device (CBFP),

[044] - automatic reclosing (AR)

[045] - determination of the place of damage - (OMP).

[046] The computational add-on ranks functions according to the following criteria:

[047] 1) by the triggering element leading to the start of the functions:

[048] group 1 - the triggering body reacts to measurements of currents and voltages of one connection: DZ 1-3 steps, MTZ 1-3 steps,

[049] group 2 - the triggering element responds to a change in the discrete signal: automatic reclosure, breaker failure protection, OMP;

[050] 2) by the delay time of the function before applying the control action:

[051] group 1: DZ stage 1 (0 s), DZ stage 1 (0 s), DZ stage 2 (0.5 s), DZ stage 2 (0.5 s), DZ stage 3 (1.5 s) ), MTZ 3 stages (2 s),

[052] group 2: CBFP (0 s), AR (1 s), OMP (10 s).

[053] In normal operation, at the time the measurements are received by the module (3), only the triggering check is performed as shown in the timing diagram in FIG. 2.

[054] After ranging, the start of the functions is carried out in the following order (see Fig. 3) from the moment the trigger is activated, signaling the possible occurrence of an emergency process:

[055] 1) for each received measurement data packet from device 6, functions are launched without time delay (DZ 1 stage, overcurrent protection stage 1, CBFP) for a configurable time interval (200 ms) guaranteeing the operation of high-speed protection, while other functions are not are started, but the measurement data is buffered for their operation;

[056] 2) after the time interval p. 2, the execution of protection functions without time delay upon receiving packets is terminated and the execution of a new set of functions starts without time delay and with a time delay of up to 0.5 s by timer (5 ms is a configurable parameter) without bindings to the event of receiving a packet with measurements (see Fig. 4), while as input data they are first transferred to the measurements obtained from the moment the trigger was triggered and buffered in step 1, then the current measurements buffered in the period between the starts of the functions ;

[057] 3) 200 ms (configurable parameter) before the delay time of the next protections, they are triggered by a timer (with an increased configurable interval - more than 10 ms) and they are first transmitted the buffered measurements from the moment the trigger is triggered, then the current measurements, buffered between function launches. In this case, if the protection functions issue other blocking functions (which are not currently running) signals, then these signals are also written into the buffer with a time stamp corresponding to the original signal from the buffer for which such a blocking signal was generated. The protection functions are terminated after removing the signal from the trigger. The computing module (3) receives the processed data and transmits control commands to the corresponding objects in the specified sequence.

[058] Thus, the inventive method implements a sporadic start and setting a sequence of executions of automatic functions, in accordance with the value of the time delay of each of the triggered automatic functions. At the same time, the problem of optimizing the operation of the automation functions, depending on the priority, has been solved in order to reduce the computational load on the microprocessor automation device (computing module).

Claims (10)

1. A method for controlling a computing module (3) of an automation system, including the following steps: (I) obtaining by an additional computing module (4) a list of automation functions that need to be performed by the computing module (3); (II) determination, by means of an additional computing module (4), for each automation function, the time delay value that is used in the algorithm for performing the automation function; (III) ranking of automation functions by means of an additional computing module (4) according to the criterion of increasing time delay; (IV) installation by means of an additional computing module (4) start timers and execution by means of a computing module (3) automatic functions in the following order: - automatic functions acting on equipment shutdown and transmitting control commands without time delay, - automation functions related to redundancy of equipment control failure, and - automatic functions with a time delay before applying the control action, in order of increasing time delay. 2. The method according to claim 1, characterized in that at step (IV) when setting the start timers, if the automation function, in addition to control signals, has intermediate blocking and / or braking and / or acceleration signals of other automation functions, the order of its execution is determined based on the time of the first of the signals, such signals are stored in the event buffer with a time stamp equal to the time stamp of the measurement signal received from the buffer. 3. The method according to claim 1, characterized in that step (I) of obtaining the list of automation functions is performed continuously.

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