阅读说明：本技术 一种变频调速多负载系统的智能切换控制方法及系统 (Intelligent switching control method and system for variable-frequency speed-regulation multi-load system ) 是由 赵金晓 孔维广 潘峰 于 2020-12-31 设计创作，主要内容包括：一种变频调速多负载系统的智能切换控制方法及系统,涉及到工业控制技术领域。解决了现有变频调速系统存在的各负载使用时间不合理所导致的问题。所述方法包括步骤：监控并记录系统中每个负载的总运行时间；当某个负载的总运行时间临近该负载的检修时限时,发出使用超期预警信息和负载替换命令；所述负载替换命令中包含待替换负载的信息；监控并记录系统中每个负载的当前已运行时间,当某个负载的当前已运行时间超过该负载的额定连续运行时间时,发出负载替换命令；当检测到负载替换命令时,选择一个待替换负载的可替换设备作为备用设备、替换所述待替换负载继续工作。本发明具有移植能力强的特点,可应用于多种工艺的变频调速多负载系统中。(An intelligent switching control method and system for a variable-frequency speed-regulating multi-load system relate to the technical field of industrial control. The problem that the service time of each load is unreasonable and leads to that has solved current variable frequency speed control system exists is solved. The method comprises the following steps: monitoring and recording the total running time of each load in the system; when the total running time of a certain load is close to the overhaul time limit of the load, sending out use overdue early warning information and a load replacement command; the load replacement command comprises information of a load to be replaced; monitoring and recording the current running time of each load in the system, and sending a load replacement command when the current running time of a certain load exceeds the rated continuous running time of the load; when a load replacement command is detected, a replaceable device of the load to be replaced is selected as a standby device, and the load to be replaced is replaced to continue working. The invention has the characteristic of strong transplanting capability and can be applied to variable-frequency speed-regulation multi-load systems of various processes.)

1. An intelligent switching control method of a variable-frequency speed-regulating multi-load system is characterized by comprising the following steps:

monitoring and recording the total running time of each load in the system;

when the total running time of a certain load is close to the overhaul time limit of the load, sending out use overdue early warning information and a load replacement command; the load replacement command comprises information of a load to be replaced;

monitoring and recording the current running time of each load in the system, and sending a load replacement command when the current running time of a certain load exceeds the rated continuous running time of the load;

when a load replacement command is detected, a replaceable device of the load to be replaced is selected as a standby device, the standby device is controlled to start, replace the load to be replaced and continue to work, and the replacement load is controlled to stop.

2. The intelligent switching control method of the variable-frequency speed-regulating multi-load system according to claim 1, characterized by further comprising the steps of:

monitoring and recording the failure times of each load;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment comprises the following steps: and selecting the equipment which has the least failure frequency and is in a stop state from all the replaceable equipment of the load to be replaced as the standby equipment.

3. The intelligent switching control method of the variable-frequency speed-regulating multi-load system according to claim 1, characterized by further comprising the steps of:

monitoring and recording the overhaul times of each load;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment comprises the following steps: and selecting the equipment which has the least repair times in all the replaceable equipment of the load to be replaced and is in a stop state as the replacement equipment.

4. The intelligent switching control method of the variable-frequency speed-regulating multi-load system according to claim 1, characterized by further comprising the steps of:

monitoring and recording the current stopped time of each load in the system;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment comprises the following steps: and selecting the device which has the longest current stopped time and is in a stopped state from all the replaceable devices of the load to be replaced as the replacement device.

5. The intelligent switching control method of the variable-frequency speed-regulating multi-load system according to claim 1, characterized by further comprising the steps of:

monitoring and recording the failure times of each load;

monitoring and recording the overhaul times of each load;

monitoring and recording the current stopped time of each load in the system;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment comprises the following steps: and performing priority ranking on all the replaceable equipment of the load to be replaced according to the failure times, the overhaul times and the current stopped time, and selecting the replaceable equipment with the highest priority as standby equipment.

6. The utility model provides an intelligent switching control system of many load systems of variable frequency speed governing which characterized in that, the system includes following module:

a load total running time recording module for monitoring and recording the total running time of each load in the system;

the load overtime early warning module is used for sending out use overtime early warning information and a load replacing command to the replacing module when the total running time of a certain load is close to the overhaul time limit of the load; the load replacement command comprises information of a load to be replaced;

the load continuous operation time recording module is used for monitoring and recording the current operation time of each load in the system and sending a load replacing command to the replacing module when the current operation time of a certain load exceeds the rated continuous operation time of the load;

the replacement module comprises a selection unit and a replacement control unit, wherein the selection unit is used for selecting a replaceable device of the load to be replaced as a spare device when receiving a load replacement command, and sending the information of the load to be replaced and the spare device to the replacement control unit; and the replacement control unit is used for controlling the standby equipment to start, replace the load to be replaced and continue working, and controlling the replacement load to stop.

7. The intelligent switching control system of variable frequency speed regulation multi-load system according to claim 6, characterized in that the system further comprises the following modules:

the load fault recording module is used for monitoring and recording the fault times of each load;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment by the selection unit comprises the following steps: and selecting the equipment which has the least failure frequency and is in a stop state from all the replaceable equipment of the load to be replaced as the standby equipment.

8. The intelligent switching control system of variable frequency speed regulation multi-load system according to claim 6, characterized in that the system further comprises the following modules:

the load overhaul frequency recording module is used for monitoring and recording the overhaul frequency of each load;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment by the selection unit comprises the following steps: and selecting the equipment which has the least repair times in all the replaceable equipment of the load to be replaced and is in a stop state as the standby equipment.

9. The intelligent switching control system of variable frequency speed regulation multi-load system according to claim 6, characterized in that the system further comprises the following modules:

the load current stop time recording module is used for monitoring and recording the current stop time of each load in the system;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment by the selection unit comprises the following steps: and selecting the equipment which has the longest current stopped time and is in a stopped state from all the replaceable equipment of the load to be replaced as the standby equipment.

10. The intelligent switching control system of variable frequency speed regulation multi-load system according to claim 6, characterized in that the system further comprises the following modules:

the load fault recording module is used for monitoring and recording the fault times of each load;

the load overhaul frequency recording module is used for monitoring and recording the overhaul frequency of each load;

the load current stop time recording module is used for monitoring and recording the current stop time of each load in the system;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment by the selection unit comprises the following steps: and performing priority ranking on all replaceable equipment of the load to be replaced according to the failure times, the overhaul times and the current stopped time, and selecting the replaceable equipment with the highest priority as standby equipment.

Technical Field

The invention relates to the technical field of industrial control, in particular to a control technology of a speed regulating system.

Background

In the development process of modern industry, the application degree of the variable frequency speed control system in the process production requirement is gradually improved, so that a plurality of variable frequency speed control functions are derived. In order to meet production safety, a backup load is usually arranged in an integral speed regulating system, but various problems exist in the long-term development, wherein the more serious problems mainly include the following types:

1. the use time of each load is unreasonable, so that individual equipment is excessively used;

2. the standby equipment has too long dead time, so that the internal corrosion and aging of the load are caused;

3. the life cycle of the equipment is not pre-warned, so that the equipment is out of service and the standby equipment cannot be put into use in time.

The problems not only can cause the overuse of partial equipment and the overuse of partial equipment of the variable frequency speed control system, but also can influence the production safety due to the overuse of the equipment or the over-age service.

Disclosure of Invention

In order to solve the problems, the invention researches and optimizes the variable-frequency speed-regulation multi-load operation control, and successfully develops a variable-frequency speed-regulation multi-load intelligent switching control method and a variable-frequency speed-regulation multi-load intelligent switching control system. The method and the system can solve the problems, have the characteristic of strong transplanting capability and can be flexibly applied and transplanted among various fields.

The invention relates to an intelligent switching control method of a variable-frequency speed-regulating multi-load system, which comprises the following steps:

monitoring and recording the total running time of each load in the system;

when the total running time of a certain load is close to the overhaul time limit of the load, sending out use overdue early warning information and a load replacement command; the load replacement command comprises information of a load to be replaced;

monitoring and recording the current running time of each load in the system, and sending a load replacement command when the current running time of a certain load exceeds the rated continuous running time of the load;

when a load replacement command is detected, a replaceable device of the load to be replaced is selected as a standby device, the standby device is controlled to start, replace the load to be replaced and continue to work, and the replacement load is controlled to stop.

The method may further include any one or more of the following steps:

monitoring and recording the failure times of each load;

monitoring and recording the overhaul times of each load;

monitoring and recording the current stopped time of each load in the system;

further, the method for selecting a replaceable device of the load to be replaced as the standby device may be selected according to any one of the above parameters of the number of failures, the number of times of repairs, and the current stopped time, and may also be selected by comprehensively considering a combination of any two or more of the above parameters.

The invention relates to an intelligent switching control system of a variable-frequency speed-regulating multi-load system, which comprises the following modules:

a load total running time recording module for monitoring and recording the total running time of each load in the system;

the load overtime early warning module is used for sending out use overtime early warning information and a load replacing command to the replacing module when the total running time of a certain load is close to the overhaul time limit of the load; the load replacement command comprises information of a load to be replaced;

the load continuous operation time recording module is used for monitoring and recording the current operation time of each load in the system and sending a load replacing command to the replacing module when the current operation time of a certain load exceeds the rated continuous operation time of the load;

the replacement module comprises a selection unit and a replacement control unit, wherein the selection unit is used for selecting a replaceable device of the load to be replaced as a spare device when receiving a load replacement command, and sending the information of the load to be replaced and the spare device to the replacement control unit; and the replacement control unit is used for controlling the standby equipment to start, replace the load to be replaced and continue working, and controlling the replacement load to stop.

Further, any one or more of the following modules can be included

The load fault recording module is used for monitoring and recording the fault times of each load;

the load overhaul frequency recording module is used for monitoring and recording the overhaul frequency of each load;

the load current stop time recording module is used for monitoring and recording the current stop time of each load in the system;

further, the method for selecting the replaceable device of the load to be replaced as the standby device by the selection unit may be selected according to any one of the obtained parameters, or may be selected by comprehensively considering the parameters obtained by any two or more modules.

The method completely abandons the idea of the original fixed standby load, has no definite standby load, and the load with higher priority enters the standby state firstly in the next cycle period.

The method of the invention is verified by actual operation, the expected effect is completely achieved, and the method of the invention is adopted to control the variable frequency speed control system, and the specific effects are as follows:

1. the total service time of each load in the variable-frequency speed control system is basically consistent, and the ultra-long time running condition of individual equipment completely disappears.

2. The device can be replaced in time when the continuous operation time of the device is longer, and the problem that the service life of the device is reduced due to the fact that the device continuously operates for a long time is avoided.

3. The long-time stagnation of the equipment can be effectively avoided, and the internal corrosion aging condition caused by the long-time stagnation of all the equipment is avoided.

3. The method can realize early warning in time when the equipment is close to maintenance time, and prompt the staff to overhaul the equipment, thereby avoiding potential safety hazard caused by the over-service of the equipment due to missing of load equipment overhaul time, and prolonging the service life of the equipment in advance of improving production efficiency and production safety coefficient.

The method of the invention is adopted to control the variable frequency speed control system, and the safety production coefficient can be obviously improved.

The method can be applied to control systems of various processes, and the application of the method comprises the fields of water supply and drainage, ventilation systems, energy transmission and the like.

Drawings

FIG. 1 is a schematic block diagram of a variable frequency speed regulation multi-load intelligent switching control method according to the present invention.

Fig. 2 is a schematic diagram of a process of designing and transplanting the variable-frequency speed-regulation multi-load intelligent switching control system according to the eleventh embodiment of the present invention.

Detailed description of the preferred embodiments

The first embodiment, the intelligent switching control method of the variable-frequency speed-regulation multi-load system in the present embodiment, includes the following steps: monitoring and recording the total running time of each load in the system;

when the total running time of a certain load is close to the overhaul time limit of the load, sending out use overdue early warning information and a load replacement command; the load replacement command comprises information of a load to be replaced;

monitoring and recording the current running time of each load in the system, and sending a load replacement command when the current running time of a certain load exceeds the rated continuous running time of the load;

when a load replacement command is detected, a replaceable device of the load to be replaced is selected as a standby device, the standby device is controlled to start, replace the load to be replaced and continue to work, and the replacement load is controlled to stop.

The total operation time of the load in the present embodiment is the sum of the accumulated time of all the operation states, which is not counted up from the start of the first operation after the load is installed.

In the present embodiment, the judgment rule of "proximity" is determined according to the performance of a load "when the total operation time of a certain load is close to the maintenance time limit of the load. For example: if the difference between the total operation time and the overhaul time limit of the load is set to be X hours, X can be selected to be a value between 1 and 2, or X can be selected to be a value between-1 and 1, so that the working performance of the corresponding load is guaranteed. The overhaul time limit of the load is an inherent performance parameter of the load and is specified by a load manufacturer.

According to the method, when the total running time of the load is close to the overhaul time limit of the load, the overtime early warning information is sent out to prompt a worker to overhaul the load, and the phenomenon that the load is out of service in an overdue mode is avoided. The load is overhauled in time, and the reliability, the operation safety factor and the service life of the load can be effectively improved.

The current operating time of the load in the present embodiment refers to a duration of time from when the load is switched from the last stopped state to the operating state to the current time.

In this embodiment, the "rated continuous operation time of the load" is a parameter set by a load manufacturer, and is generally designed from the perspective of safety and service life of the device, so as to avoid that the device is damaged by an excessively long continuous operation time of the device, and further, the reliability and the safety of the device are affected. When the continuous operation time of the load is monitored to be longer, the load is replaced in time, so that the load stops working, and the problems of reliability reduction, safety reduction and service life damage caused by the long-time continuous operation of the load are effectively solved.

In the second embodiment, the intelligent switching control method of the variable-frequency speed-regulation multi-load system according to the first embodiment is further supplemented, and the second embodiment adds the following steps: monitoring and recording the failure times of each load;

and further defining the method of selecting an alternative device for the load to be replaced as the backup device as: and selecting the equipment which has the least failure frequency and is in a stop state from all the replaceable equipment of the load to be replaced as the standby equipment.

The number of failures of the load in the present embodiment is the sum of the number of failures that have occurred since the load was first put into use, and the parameter is cleared to zero after the load is replaced with a new load.

This embodiment defines the principle of selecting a backup device, namely: and the equipment with less failure times is selected as standby equipment for replacement, so that the safety of the whole system can be improved. In practice, the online time of the equipment with a large number of control failures is reduced, and the online time of the equipment with a small number of control failures is prolonged.

In a third embodiment, the present embodiment is a further supplement to the intelligent switching control method for a variable frequency speed regulation multiple load system described in the first embodiment, and the present embodiment adds the following steps: monitoring and recording the overhaul times of each load;

and further defining the method of selecting an alternative device for the load to be replaced as the backup device as: and selecting the equipment which has the least repair times in all the replaceable equipment of the load to be replaced and is in a stop state as the replacement equipment.

The number of times of maintenance of the load in the present embodiment is the sum of the number of times of maintenance of the load since the load was first put into use, and this parameter is cleared to zero until the load is replaced with a new load.

This embodiment defines the principle of selecting a backup device, namely: the equipment with the least number of times of maintenance is selected as standby equipment for replacement, the number of times of maintenance is small, and generally means that the service life of the equipment is longer than that of the equipment. The method controls the total service time of similar loads in the variable frequency speed control system to be basically consistent, and avoids the occurrence of the condition of ultra-long time operation of individual equipment.

In a fourth embodiment, the present embodiment is a further supplement to the intelligent switching control method for a variable frequency speed regulation multiple load system described in the first embodiment, and the present embodiment adds the following steps: monitoring and recording the current stopped time of each load in the system;

and further defining the method of selecting an alternative device for the load to be replaced as the backup device as: and selecting the device which has the longest current stopped time and is in a stopped state from all the replaceable devices of the load to be replaced as the replacement device.

The current stopped time of the load in the present embodiment refers to a time length from when the load is switched from the last operation state to the stopped state to the current time.

This embodiment defines the principle of selecting a backup device, namely: and equipment with long stop time is used as replacement equipment, so that the condition of internal corrosion and aging caused by long-time stagnation of the equipment is avoided.

In a fifth embodiment, the present embodiment is a method for controlling intelligent switching of a variable frequency speed regulation multi-load system, which integrates the alternative factors described in the first to fourth embodiments, and the method adds the following steps to the method described in the first embodiment:

monitoring and recording the failure times of each load;

monitoring and recording the overhaul times of each load;

monitoring and recording the current stopped time of each load in the system;

and the method for selecting the replaceable equipment of the load to be replaced as the standby equipment comprises the following steps: and performing priority ranking on all the replaceable equipment of the load to be replaced according to the failure times, the overhaul times and the current stopped time, and selecting the replaceable equipment with the highest priority as standby equipment.

For the selection of the standby equipment, the embodiment comprehensively considers a plurality of factors to sort the plurality of replaceable equipment. The actual sorting principle may be determined according to the actual situation of the load.

For example: all the alternative devices are ordered according to the various parameters described above: the failure times and the overhaul times are sorted from low to high, the current stopped time is sorted from large to small, two devices in the front of each parameter sorting are assigned with a score of 1, and the replaceable device with the highest score has the highest priority. When devices with the same score are present: firstly, comparing the current stop time of the equipment, wherein the priority of the time length is the highest; if the current stop time is the same, the overhaul times are further compared, and the priority with the least overhaul times is highest; if the maintenance times are the same, further comparing the failure times, wherein the priority with the least failure times is the highest; if the failure times are the same, one device is arbitrarily selected as the device with the highest priority.

In practical application, referring to fig. 1, other factor book collection may be added, for example: the load body condition and other parameters of the load current state lamp can be determined according to the condition of actual equipment. The load body condition can also be called as a load health state, can be input by a maintenance worker, is an evaluation index of the load health state, and can be generally obtained according to the condition evaluation of load parts during maintenance. On the premise that the parameters are acquired, when the standby equipment is selected, the equipment with the best health state can be selected, namely: increasing the online runtime of a healthy device.

In practical application, a corresponding replacement strategy is formulated according to system requirements and performance indexes of each load, namely: and making related early warning and priority sequencing, and automatically switching the load.

The method described in this embodiment completely abandons the idea of the original fixed standby load, and has no definite standby load, and the load with higher priority enters the standby state first in the next cycle.

In a sixth embodiment, the present invention is a system corresponding to the intelligent switching control method for a variable-frequency speed-regulation multi-load system in the first embodiment, and the system includes the following modules:

a load total running time recording module for monitoring and recording the total running time of each load in the system;

the load overtime early warning module is used for sending out use overtime early warning information and a load replacing command to the replacing module when the total running time of a certain load is close to the overhaul time limit of the load; the load replacement command comprises information of a load to be replaced;

the load continuous operation time recording module is used for monitoring and recording the current operation time of each load in the system and sending a load replacing command to the replacing module when the current operation time of a certain load exceeds the rated continuous operation time of the load;

the replacement module comprises a selection unit and a replacement control unit, wherein the selection unit is used for selecting a replaceable device of the load to be replaced as a spare device when receiving a load replacement command, and sending the information of the load to be replaced and the spare device to the replacement control unit; and the replacement control unit is used for controlling the standby equipment to start, replace the load to be replaced and continue working, and controlling the replacement load to stop.

A seventh embodiment is further limited to the intelligent switching control system of the variable-frequency speed-regulation multi-load system according to the sixth embodiment, and in the seventh embodiment, the system further includes the following modules:

the load fault recording module is used for monitoring and recording the fault times of each load;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment by the selection unit comprises the following steps: and selecting the equipment which has the least failure frequency and is in a stop state from all the replaceable equipment of the load to be replaced as the standby equipment.

An eighth embodiment is further limited to the intelligent switching control system of the variable-frequency speed-regulation multi-load system according to the sixth embodiment, and in the present embodiment, the system further includes the following modules:

the load overhaul frequency recording module is used for monitoring and recording the overhaul frequency of each load;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment by the selection unit comprises the following steps: and selecting the equipment which has the least repair times in all the replaceable equipment of the load to be replaced and is in a stop state as the standby equipment.

Ninth embodiment, the present embodiment is further limited to the intelligent switching control system of the variable frequency speed control multi-load system according to the sixth embodiment, and in the present embodiment, the system further includes the following modules:

the load current stop time recording module is used for monitoring and recording the current stop time of each load in the system;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment by the selection unit comprises the following steps: and selecting the equipment which has the longest current stopped time and is in a stopped state from all the replaceable equipment of the load to be replaced as the standby equipment.

An embodiment tenth and this embodiment are further limited to the intelligent switching control system of the variable-frequency speed-regulation multi-load system according to the sixth embodiment, and in this embodiment, the system further includes the following modules:

the load fault recording module is used for monitoring and recording the fault times of each load;

the load overhaul frequency recording module is used for monitoring and recording the overhaul frequency of each load;

the load current stop time recording module is used for monitoring and recording the current stop time of each load in the system;

the method for selecting the replaceable equipment of the load to be replaced as the standby equipment by the selection unit comprises the following steps: and performing priority ranking on all replaceable equipment of the load to be replaced according to the failure times, the overhaul times and the current stopped time, and selecting the replaceable equipment with the highest priority as standby equipment.

The eleventh embodiment is a process of designing and transplanting the variable-frequency speed-regulation multi-load intelligent switching control system, which is shown in fig. 2, and the specific process is as follows:

1. the statistical frequency conversion speed regulation multi-load system relevant parameters comprise:

1) the load quantity is as follows: total number of loads, design number in actual operation;

2) the load type is as follows: such as water pumps, fans, oil pumps, etc.;

3) control signal point table: the method comprises the steps of IO point type, number, name and function;

4) controller brand: providing corresponding function strategy implementation methods according to different brand controls;

5) the equipment use environment is as follows: according to different process environments, making corresponding maintenance periods;

2. control policy migration

According to the parameters, a control strategy function block (control system) is programmed according to the control method of the invention, and the programmed control strategy function block (control system) is transplanted to a controller of the variable-frequency speed-regulating multi-load system.

3. Function debugging

And performing online simulation debugging on each function of the control strategy, and after the simulation debugging is passed, putting a load into the control strategy to perform actual operation debugging.

4. Put into use

And after all the debugging work is finished, the system can be put into formal use.

Overall, no significant effort is required in the overall implementation. Because the control strategy is well modularized, the method can be implemented only by slightly adjusting according to different process parameter requirements, and the development difficulty and the implementation period are conveniently and quickly reduced.