CN111142492B - Controller oscillation divergence control method, controller and storage medium - Google Patents
Controller oscillation divergence control method, controller and storage medium Download PDFInfo
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Abstract
The invention discloses a controller oscillation divergence control method, a controller and a storage medium, wherein the controller oscillation divergence control method comprises the following steps: acquiring a first controlled variable value in real time in a preset adjusting period, and calculating according to the first controlled variable value and a preset stable value to obtain a positive deviation value and a negative deviation value; judging whether the positive deviation value and the negative deviation value accord with a preset rule or not; if the positive deviation value and the negative deviation value accord with the preset rule, confirming that an oscillation phenomenon occurs; calculating to obtain an instruction mean value according to control instruction parameters sent to external equipment, and calculating to obtain an instruction error according to the instruction mean value and a preset instruction value; judging whether the absolute value of the instruction error is smaller than a preset dead zone width; and if the absolute value of the command error is smaller than the preset dead zone width, entering a manual mode for operation. The invention can realize manual adjustment when the oscillation divergence phenomenon of the controller cannot be automatically adjusted.
Description
Technical Field
The invention relates to the technical field of automatic control of thermal power plants, in particular to a method for controlling oscillation divergence of a controller, the controller and a storage medium.
Background
At present, the development of the national power industry is faster and faster, the automation level is higher and higher, DCS control is generally applied to various thermal power plants, and an automatic control system in the DCS generally adopts a conventional PID control strategy. In general, the control system can achieve a better adjusting effect by automatically adjusting the setting parameters. However, if the parameter setting is strong or large disturbance occurs, the oscillation divergence phenomenon cannot be automatically adjusted by setting the parameter.
Therefore, it is necessary to provide a method for controlling the divergence of oscillation of a controller to solve the above technical problems.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a controller oscillation divergence control method, a controller and a storage medium, and aims to solve the technical problem that the oscillation divergence phenomenon of the controller cannot be automatically adjusted.
In order to achieve the above object, the present invention provides a controller oscillation divergence control method, where the controller oscillation divergence control method is used for a controller in a distributed control system, the distributed control system is used for controlling a generator set, and the controller oscillation divergence control method includes:
acquiring a first controlled variable value in real time in a preset adjusting period, and calculating according to the first controlled variable value and a preset stable value to obtain a positive deviation value and a negative deviation value;
judging whether the positive deviation value and the negative deviation value accord with a preset rule or not;
if the positive deviation value and the negative deviation value accord with the preset rule, confirming that an oscillation phenomenon occurs;
calculating to obtain an instruction mean value according to control instruction parameters sent to external equipment, and calculating to obtain an instruction error according to the instruction mean value and a preset instruction value;
judging whether the absolute value of the instruction error is smaller than a preset dead zone width;
and if the absolute value of the command error is smaller than the preset dead zone width, entering a manual mode for operation.
Preferably, the step of determining whether the positive deviation value and the negative deviation value meet a preset rule includes:
judging whether the positive deviation value is larger than the preset deviation value or not, and judging whether the negative deviation value is larger than the preset deviation value or not;
if the forward deviation value is larger than the preset deviation value, triggering a first signal;
if the negative deviation value is larger than the preset deviation value, triggering a second signal;
when the timing of the preset oscillation reset time is finished, judging whether the first signal and the second signal are both triggered, wherein the timing of the preset oscillation reset time is started at the beginning of the preset adjusting period;
if the positive deviation value and the negative deviation value accord with the preset rule, the step of confirming that the oscillation phenomenon occurs comprises the following steps:
and if the first signal and the second signal are both triggered, confirming that the oscillation phenomenon occurs.
Preferably, if the forward deviation value is greater than the preset deviation value, the step of triggering the first signal further includes:
acquiring the second controlled variable value in real time, and calculating whether the forward deviation value is smaller than the preset deviation value in the preset oscillation reset time;
and if the forward deviation value is smaller than the preset deviation value within the preset oscillation reset time, updating the first signal for resetting.
Preferably, if the negative deviation value is greater than the preset deviation value, the step of triggering the second signal further includes:
acquiring the second controlled variable value in real time, and calculating whether the negative deviation value is smaller than the preset deviation value in the preset oscillation reset time;
and if the negative deviation value is smaller than the preset deviation value within the preset oscillation reset time, updating the second signal for resetting.
Preferably, the control instruction parameters include a gate instruction low value and a gate instruction high value; the step of calculating to obtain an instruction mean value according to control instruction parameters sent to external equipment and calculating to obtain an instruction error according to the instruction mean value and a preset instruction value comprises the following steps:
acquiring a gate regulating instruction low value and a gate regulating instruction high value within a preset oscillation duration, wherein the preset oscillation duration starts to time at the beginning of the preset regulation period;
calculating to obtain the instruction mean value according to the gate adjusting instruction low value, the gate adjusting instruction high value and the preset oscillation duration;
and calculating to obtain the instruction error according to the instruction mean value and the preset instruction value.
Preferably, the preset oscillation reset time is greater than the preset adjustment period, and if the preset adjustment period is T, T < the preset oscillation reset time < 2T.
Preferably, the preset oscillation duration is longer than the preset oscillation reset time, the preset adjustment period is set to T, and then T < the preset oscillation reset time < the preset oscillation duration < 2T.
Preferably, after the step of entering the manual mode operation if the absolute value of the command error is smaller than the preset dead zone width, the method further includes:
generating an alarm signal and sending the alarm signal to a user terminal;
and receiving a manual adjusting instruction, and adjusting the controller.
To achieve the above object, the present invention further provides a controller, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the controller oscillation divergence control method as described above.
To achieve the above object, the present invention further provides a storage medium having a computer program stored thereon, which when executed by a processor, implements the steps of the controller oscillation divergence control method as described above.
The embodiment of the invention provides a method, a system, a controller and a storage medium for controlling oscillation divergence of a controller, which can realize manual adjustment when the oscillation divergence phenomenon of the controller can not be automatically adjusted by confirming whether the oscillation phenomenon occurs and judging whether the oscillation phenomenon can be automatically adjusted when the oscillation phenomenon occurs.
Drawings
FIG. 1 is a schematic diagram of a controller of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a first embodiment of a method for controlling oscillation dispersion of a controller according to the present invention;
FIG. 3 is a partial detailed flowchart of a second embodiment of a method for controlling oscillation dispersion of a controller according to the present invention;
FIG. 4 is a flowchart illustrating a third embodiment of a method for controlling oscillation dispersion of a controller according to the present invention;
FIG. 5 is a flowchart illustrating a fourth embodiment of a method for controlling oscillation dispersion of a controller according to the present invention;
FIG. 6 is a partial detailed flowchart of a fifth embodiment of a method for controlling oscillation dispersion of a controller according to the present invention;
FIG. 7 is a flowchart illustrating an eighth embodiment of a method for controlling oscillation dispersion of a controller according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a controller oscillation divergence control method, a controller and a storage medium.
As shown in fig. 1, the method of the present invention is applied to a controller, which may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may comprise a touch-sensitive pad, touch screen, keyboard, and the optional user interface 1003 may also comprise a standard wired, wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001. The sensing detector can be an infrared sensing detector, a distance sensing detector, a heat sensing detector and the like. The image capturing device may be a built-in camera provided inside the display device, or may be an external camera communicatively connected to the processor 1001.
Optionally, the controller may further be configured with other sensors such as a gyroscope, a barometer, a hygrometer and a thermometer, which are not described herein again.
Those skilled in the art will appreciate that the controller configuration shown in fig. 1 does not constitute a limitation of the controller, and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and an oscillation divergence control program.
In the display apparatus shown in fig. 1, the processor 1001 may be configured to call up an oscillation dispersion control program stored in the memory 1005, and perform the following operations:
acquiring a first controlled variable value in real time in a preset adjusting period, and calculating according to the first controlled variable value and a preset stable value to obtain a positive deviation value and a negative deviation value;
judging whether the positive deviation value and the negative deviation value accord with a preset rule or not;
if the positive deviation value and the negative deviation value accord with the preset rule, confirming that an oscillation phenomenon occurs;
calculating to obtain an instruction mean value according to control instruction parameters sent to external equipment, and calculating to obtain an instruction error according to the instruction mean value and a preset instruction value;
judging whether the absolute value of the instruction error is smaller than a preset dead zone width;
and if the absolute value of the command error is smaller than the preset dead zone width, entering a manual mode for operation.
Further, the processor 1001 may be configured to invoke an oscillation dispersion control program stored in the memory 1005, and further perform the following operations:
judging whether the positive deviation value is larger than the preset deviation value or not, and judging whether the negative deviation value is larger than the preset deviation value or not;
if the forward deviation value is larger than the preset deviation value, triggering a first signal;
if the negative deviation value is larger than the preset deviation value, triggering a second signal;
when the timing of the preset oscillation reset time is finished, judging whether the first signal and the second signal are both triggered, wherein the timing of the preset oscillation reset time is started at the beginning of the preset adjusting period;
if the positive deviation value and the negative deviation value accord with the preset rule, the step of confirming that the oscillation phenomenon occurs comprises the following steps:
and if the first signal and the second signal are both triggered, confirming that the oscillation phenomenon occurs.
Further, the processor 1001 may be configured to invoke an oscillation dispersion control program stored in the memory 1005, and further perform the following operations:
acquiring the second controlled variable value in real time, and calculating whether the forward deviation value is smaller than the preset deviation value in the preset oscillation reset time;
and if the forward deviation value is smaller than the preset deviation value within the preset oscillation reset time, updating the first signal for resetting.
Further, the processor 1001 may be configured to invoke an oscillation dispersion control program stored in the memory 1005, and further perform the following operations:
acquiring the second controlled variable value in real time, and calculating whether the negative deviation value is smaller than the preset deviation value in the preset oscillation reset time;
and if the negative deviation value is smaller than the preset deviation value within the preset oscillation reset time, updating the second signal for resetting.
Further, the control instruction parameters include a gate instruction low value and a gate instruction high value, and the processor 1001 may be configured to call the oscillation dispersion control program stored in the memory 1005, and further perform the following operations:
acquiring a gate regulating instruction low value and a gate regulating instruction high value within a preset oscillation duration, wherein the preset oscillation duration starts to time at the beginning of the preset regulation period;
calculating to obtain the instruction mean value according to the gate adjusting instruction low value, the gate adjusting instruction high value and the preset oscillation duration;
and calculating to obtain the instruction error according to the instruction mean value and the preset instruction value.
Further, the preset oscillation reset time is greater than the preset adjustment period, and if the preset adjustment period is T, T < the preset oscillation reset time < 2T.
Further, the preset oscillation duration is greater than the preset oscillation reset time, the preset adjustment period is set to T, and then T < the preset oscillation reset time < the preset oscillation duration < 2T.
Further, the processor 1001 may be configured to invoke an oscillation dispersion control program stored in the memory 1005, and further perform the following operations:
generating an alarm signal and sending the alarm signal to a user terminal;
and receiving a manual adjusting instruction, and adjusting the controller.
Based on the above hardware structure, various embodiments of the controller oscillation divergence control method in the present application are proposed.
Referring to fig. 2, a first embodiment of the present invention provides a controller oscillation divergence control method, where the controller oscillation divergence control method is used for a controller in a distributed control system, where the distributed control system is used to control a generator set, and the controller oscillation divergence control method includes:
step S100, collecting a first controlled variable value in real time in a preset regulation period, and calculating according to the first controlled variable value and a preset stable value to obtain a positive deviation value and a negative deviation value;
in this embodiment, the controlled variable may be mechanical power of the generator set, temperature of a built-in sensor, the preset regulation period is set by a person skilled in the art, the controller may acquire, in real time, a first controlled variable value in one preset regulation period, where the first controlled variable value is acquired in real time by a measuring device in the distributed control system, and for example, the temperature may be acquired in real time by a temperature sensor; calculating a positive deviation value and a negative deviation value according to the first controlled variable value and a preset stable value, wherein the positive deviation value is a difference value between the first controlled variable value and the preset stable value when the first controlled variable value is larger than the preset stable value; and the negative deviation value is a difference value between the first controlled variable value and the preset stable value when the first controlled variable value is smaller than the preset stable value.
Step S110, judging whether the positive deviation value and the negative deviation value accord with a preset rule or not;
step S120, if the positive deviation value and the negative deviation value accord with the preset rule, confirming that an oscillation phenomenon occurs;
if the positive deviation value and the negative deviation value do not accord with the preset rule, no processing is carried out;
in this embodiment, the oscillation phenomenon is determined by determining whether the positive deviation value and the negative deviation value meet the preset rule, where the preset rule may specifically be determining whether the positive deviation value is greater than the preset deviation value, determining whether the negative deviation value is greater than the preset deviation value, and determining whether to trigger the first signal and the second signal according to the determination result, so as to determine that the oscillation phenomenon occurs.
Step S130, calculating to obtain an instruction mean value according to a control instruction parameter sent to external equipment, and calculating to obtain an instruction error according to the instruction mean value and a preset instruction value;
step S140, judging whether the absolute value of the instruction error is smaller than a preset dead zone width;
step S150, if the absolute value of the instruction error is smaller than the preset dead zone width, entering a manual mode for operation;
and if the absolute value of the instruction error is larger than or equal to the preset dead zone width, not processing.
In this embodiment, if it is determined that the oscillation phenomenon occurs, obtaining a control instruction parameter, where the control instruction parameter is generated by the controller, specifically, when the oscillation phenomenon occurs, the controller automatically calculates the control instruction parameter to control a valve in the system, and at this time, the controller is in an automatic mode; and calculating to obtain an instruction mean value according to the control instruction parameters, and calculating to obtain an instruction error according to the instruction mean value and a preset instruction value so as to judge whether the absolute value of the instruction error is smaller than a preset dead zone width, wherein the preset dead zone width is the allowed error size, if the absolute value of the instruction error is smaller than the preset dead zone width, the absolute value of the instruction error of the controller at the moment is smaller, and the preset automatic calculation program in the controller cannot perform an automatic adjustment function. Thus requiring entry into manual mode operation.
In this embodiment, after the controller is determined to have the oscillation phenomenon, it is determined whether the controller can be automatically adjusted, and when the controller cannot be automatically adjusted, the controller enters a manual mode to operate. The technical problem that the oscillation divergence phenomenon of the controller cannot be automatically adjusted is solved.
Further, referring to fig. 3, fig. 3 is a flowchart illustrating a step S110 of the oscillation divergence control method of the controller shown in fig. 2 in a detailed manner, in this embodiment, the step S110 includes:
step S200, judging whether the positive deviation value is larger than the preset deviation value or not, and judging whether the negative deviation value is larger than the preset deviation value or not;
in this embodiment, to determine whether the hunting phenomenon occurs, it is first determined whether the positive deviation value is greater than the preset deviation value and the negative deviation value is greater than the preset deviation value, and the hunting phenomenon may occur only when the positive deviation value is greater than the preset deviation value and the negative deviation value is greater than the preset deviation value.
Step S210, if the forward deviation value is larger than the preset deviation value, triggering a first signal;
if the forward deviation value is smaller than or equal to the preset deviation value, no processing is carried out;
step S220, if the negative deviation value is larger than the preset deviation value, triggering a second signal;
if the negative deviation value is less than or equal to the preset deviation value, no processing is performed;
step S230, when the preset oscillation reset time is timed out, determining whether both the first signal and the second signal are triggered, where the preset oscillation reset time starts to be timed at the beginning of the preset adjustment period;
if the positive deviation value and the negative deviation value accord with the preset rule, the step of confirming that the oscillation phenomenon occurs comprises the following steps:
step S240, if both the first signal and the second signal are triggered, determining that the oscillation phenomenon occurs;
and if any one of the first signal and the second signal is not triggered or neither of the first signal and the second signal is triggered, not processing.
In this embodiment, it is greater than to predetermine the oscillation reset time predetermine the regulation cycle, specifically, establish predetermine the regulation cycle and be T, then T < predetermine the oscillation reset time <2T, in order to guarantee the accuracy that the oscillation phenomenon was judged, predetermine the oscillation reset time and can set up to 1.2T, predetermine the oscillation reset time with when predetermineeing the regulation cycle and beginning timing, only when predetermineeing the oscillation reset time timing and ending, confirm first signal with the second signal all triggers, just can confirm the controller oscillation phenomenon takes place.
In this embodiment, if the forward deviation value is greater than preset the deviation value, then trigger the first signal, if the negative deviation value is greater than preset the deviation value, then trigger the second signal, but trigger first signal and second signal and can not confirm that the oscillation phenomenon takes place because probably be the error that the controller appears in the single regulation, this application is through setting up preset the oscillation reset time, through when presetting the oscillation reset time timing and ending, judge first signal with the second signal is all triggered, when presetting the oscillation reset time timing and ending, confirms that first signal and second signal do not all reset promptly for whether the judgement of oscillation phenomenon takes place is more accurate.
Further, referring to fig. 4, fig. 4 is a flowchart illustrating an embodiment of a method for controlling oscillation dispersion of a controller according to the present invention, in this embodiment, after the step S210, the method includes:
step S300, collecting the second controlled variable value in real time, and calculating whether the forward deviation value is smaller than the preset deviation value in the preset oscillation reset time;
in this embodiment, in a preset adjustment period, if the forward deviation value is greater than the preset deviation value, after the first signal is triggered, the second controlled variable value needs to be collected in real time, and the forward deviation value needs to be calculated within a preset oscillation reset time, so as to determine whether the forward deviation value is smaller than the preset deviation value.
Step S310, if the forward deviation value is smaller than the preset deviation value in the preset oscillation reset time, updating the first signal to reset in the preset oscillation reset time;
and if the forward deviation value is greater than or equal to the preset deviation value in the preset oscillation reset time, not processing.
In this embodiment, if the forward deviation value is smaller than the preset deviation value within the preset oscillation reset time, the first signal reset is updated, for example: the method comprises the steps that a first signal is triggered in a preset adjusting period, the signal state is changed from 0 to 1, however, because the preset oscillation resetting time is longer than the preset adjusting period, when the preset oscillation resetting time is not timed up, whether a forward deviation value is smaller than a preset deviation value or not is judged in real time, when the forward deviation value is smaller than the preset deviation value, the first signal is reset, and the signal state is reset from 1 to 0. Whether the first signal is reset or not is judged by presetting oscillation reset time, and the first signal is favorably prevented from being generated due to errors of a controller in single adjustment.
Further, referring to fig. 5, fig. 5 is a flowchart illustrating an embodiment of a method for controlling oscillation dispersion of a controller according to the present invention, in this embodiment, after the step S220, the method includes:
step S400, collecting the second controlled variable value in real time, and calculating whether the negative deviation value is smaller than the preset deviation value in the preset oscillation reset time;
step S410, if the negative deviation value is smaller than the preset deviation value in the preset oscillation reset time, updating the reset of the second signal in the preset oscillation reset time;
and if the negative deviation value is larger than or equal to the preset deviation value in the preset oscillation reset time, not processing.
In this embodiment, whether the second signal is reset or not is also determined while the first signal is determined to be reset, as long as one of the first signal and the second signal is reset, the oscillation phenomenon cannot be determined, and the oscillation phenomenon is determined by triggering the first signal and the second signal when the preset oscillation reset time is timed out, and determining whether the oscillation phenomenon occurs or not through multiple determination, so that the determination result is more accurate, and the accuracy of the oscillation phenomenon determination is ensured.
Further, referring to fig. 6, fig. 6 is a flowchart illustrating a step S130 of the oscillation divergence control method of the controller shown in fig. 2 in a detailed manner, in this embodiment, the step S130 includes:
step S500, acquiring a gate regulating instruction low value and a gate regulating instruction high value within a preset oscillation duration, wherein the preset oscillation duration starts to time at the beginning of the preset regulation period;
in this embodiment, the preset oscillation duration is greater than the preset oscillation reset time, specifically, if the preset adjustment period is T, 1.5T < the preset oscillation duration <2T, and the preset oscillation duration starts to be timed at the beginning of the preset adjustment period. If the oscillation phenomenon is confirmed to occur, because the controller has an automatic adjusting function, an automatic calculation program preset in the controller calculates control instruction parameters to control a valve in the system, and the low value and the high value of the gate regulating instruction are obtained when the valve is adjusted and are used for calculating the instruction mean value.
Step S510, calculating to obtain the instruction mean value according to the gate adjusting instruction low value, the gate adjusting instruction high value and the preset oscillation duration;
in this embodiment, the calculation of the command mean value according to the gate command low value, the gate command high value and the oscillation duration may specifically be a calculation of the command mean value in the oscillation time according to an integration algorithm.
Step S520, calculating the command error according to the command mean and the preset command value.
In this embodiment, the command error refers to a command error generated by the controller in automatic adjustment, and when an absolute value of the command error is smaller than a preset dead zone width, the preset dead zone width is an allowable error, and the automatic adjustment of the controller does not work.
In this embodiment, the instruction error in the oscillation duration is calculated by the instruction mean value, which is beneficial to determining whether the automatic adjustment of the controller in the preset oscillation duration can play a role by using the instruction error.
Further, the preset oscillation reset time is greater than the preset adjustment period, and if the preset adjustment period is T, T < the preset oscillation reset time < 2T.
In this embodiment, the preset oscillation reset time may be set to 1.2T, so as to ensure accuracy of the oscillation phenomenon determination.
Further, the preset oscillation duration is greater than the preset oscillation reset time, the preset adjustment period is set to T, and then T < the preset oscillation reset time < the preset oscillation duration < 2T.
In this embodiment, the preset oscillation duration may be set to 1.5T to 2T, and the preset adjustment period and the preset oscillation reset time are set to determine whether the oscillation phenomenon actually occurs, and the preset oscillation duration is set to determine whether the controller can perform the automatic adjustment function, so as to form a set of mutually-matched oscillation dispersion phenomenon control system, and avoid the situation that the oscillation dispersion phenomenon cannot be automatically adjusted.
Further, referring to fig. 7, fig. 7 is a flowchart illustrating an embodiment of a method for controlling oscillation dispersion of a controller according to the present invention, in this embodiment, after the step S150, the method includes:
step S600, generating an alarm signal and sending the alarm signal to a user terminal;
and step S610, receiving a manual adjusting instruction and adjusting the controller.
In this implementation, after the controller enters the manual mode operation, by sending an alarm signal to the user terminal, the staff of the power plant can find the problem of the control system in time, and adjust the controller by sending a manual adjustment instruction, wherein the manual adjustment instruction may be to modify some parameters in the controller.
The specific embodiment of the storage medium of the present invention is substantially the same as the embodiments of the controller oscillation divergence control method, and is not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be substantially or partially embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a display device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A controller oscillation divergence control method is used for a controller in a distributed control system, the distributed control system is used for controlling a generator set, and the controller oscillation divergence control method comprises the following steps:
acquiring a first controlled variable value in real time in a preset adjusting period, and calculating according to the first controlled variable value and a preset stable value to obtain a positive deviation value and a negative deviation value;
judging whether the positive deviation value is larger than the preset deviation value or not, and judging whether the negative deviation value is larger than the preset deviation value or not;
if the forward deviation value is larger than the preset deviation value, triggering a first signal;
if the negative deviation value is larger than the preset deviation value, triggering a second signal;
when the timing of the preset oscillation reset time is finished, judging whether the first signal and the second signal are both triggered, wherein the timing of the preset oscillation reset time is started at the beginning of the preset adjusting period;
if the first signal and the second signal are both triggered, confirming that the oscillation phenomenon occurs;
calculating to obtain an instruction mean value according to control instruction parameters sent to external equipment, and calculating to obtain an instruction error according to the instruction mean value and a preset instruction value;
judging whether the absolute value of the instruction error is smaller than a preset dead zone width;
and if the absolute value of the command error is smaller than the preset dead zone width, entering a manual mode for operation.
2. The method as claimed in claim 1, wherein the step of triggering the first signal if the forward bias is greater than the predetermined bias further comprises:
acquiring a second controlled variable value in real time, and calculating whether the forward deviation value is smaller than the preset deviation value in the preset oscillation reset time;
and if the forward deviation value is smaller than the preset deviation value within the preset oscillation reset time, updating the first signal for resetting.
3. The method of claim 1 wherein the step of triggering a second signal if the negative offset value is greater than the predetermined offset value further comprises:
acquiring a second controlled variable value in real time, and calculating whether the negative deviation value is smaller than the preset deviation value in the preset oscillation reset time;
and if the negative deviation value is smaller than the preset deviation value within the preset oscillation reset time, updating the second signal for resetting.
4. The controller oscillation divergence control method of claim 1, wherein the control command parameters comprise a gate command low value and a gate command high value; the step of calculating to obtain an instruction mean value according to control instruction parameters sent to external equipment and calculating to obtain an instruction error according to the instruction mean value and a preset instruction value comprises the following steps:
acquiring a gate regulating instruction low value and a gate regulating instruction high value within a preset oscillation duration, wherein the preset oscillation duration starts to time at the beginning of the preset regulation period;
calculating to obtain the instruction mean value according to the gate adjusting instruction low value, the gate adjusting instruction high value and the preset oscillation duration;
and calculating to obtain the instruction error according to the instruction mean value and the preset instruction value.
5. The method according to claim 1, wherein the preset oscillation reset time is longer than the preset adjustment period, and if the preset adjustment period is T, then T < the preset oscillation reset time < 2T.
6. The method as claimed in claim 5, wherein the preset oscillation duration is longer than the preset oscillation reset time, and the preset adjustment period is T, then T < the preset oscillation reset time < the preset oscillation duration < 2T.
7. The controller oscillation divergence control method of any one of claims 1 to 6, wherein the step of entering a manual mode of operation if the absolute value of the commanded error is less than the preset dead band width further comprises:
generating an alarm signal and sending the alarm signal to a user terminal;
and receiving a manual adjusting instruction, and adjusting the controller.
8. A controller comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the controller oscillation divergence control method according to any one of claims 1 to 7 when executing the program.
9. A storage medium, characterized in that the storage medium has stored thereon a computer program which, when being executed by a processor, realizes the steps of the controller oscillation divergence control method according to any one of claims 1 to 7.
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