Coal mill oil station control device

Abstract

The invention provides a coal mill oil station control device, which belongs to the technical field of intelligent control, and comprises a lubricating oil pump assembly, a hydraulic oil pump assembly, a lubricating oil tank heater assembly and a hydraulic oil tank heater assembly, wherein the first power supply and the second power supply are respectively connected with the lubricating oil pump assembly, the hydraulic oil pump assembly, the lubricating oil tank heater assembly and the hydraulic oil tank heater assembly; any one of the first power supply and the second power supply is used as a power supply, and the other power supply is used as a standby power supply. And the equipment operation reliability is improved and maintenance is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent control, and in particular to a coal mill oil station control device. Background Art

[0002] As a thermal power plant, coal mill is an indispensable main equipment. Its stable operation is crucial to the power plant. Usually, the mechanical part of the coal mill needs two oil pumps to serve it, namely hydraulic oil pump and lubricating oil pump. These two oil pumps will provide lubrication of the rotating part of the coal mill and the lifting function of the equipment. At the same time, these two oil pumps also have their own oil tanks, and there are heaters in the oil tanks to form their own oil systems. The heater can heat the oil in the oil tank under low temperatures in winter to avoid excessive viscosity of the oil in winter, which affects the lubrication and lifting effects.

[0003] like Figure 1 As shown, the working system of two oil pumps in the existing design has the following disadvantages: The first disadvantage is that the hydraulic oil pump and the lubricating oil pump are both connected to the 1QK power supply. If the 1QK power supply fails, the lubricating oil pump and the hydraulic oil pump cannot operate. In addition, the control circuits of the oil pump and the heater are also connected to the 1QK power supply, which also causes the heater to fail to operate. In other words, as long as the 1QK power supply fails, both oil systems cannot operate and the coal mill must be shut down.

[0004] The second disadvantage is that if 2QK loses power, the oil pump can operate, but the heater cannot.

[0005] The third disadvantage is that the control power supply for the oil pump and heater is taken from 1QK, which converts AC 380 volts into AC 220 volts through the control transformer KB. If during operation, the control components of any oil pump or heater are damaged and need to be replaced, the two control fuses 1R and 2R need to be opened, which will also cause the oil pump and heater to stop running and the coal mill to stop working.

[0006] The fourth disadvantage is that 1R and 2R carry 4 contactor coils for all control circuits, and the capacity of the fuse needs to be selected according to the current of the 4 coils. This will greatly reduce the sensitivity of protection for each contactor coil, which can easily lead to over-tripping and expand the accident.

[0007] Since the existing design has the above defects and cannot meet the normal operation requirements, the present invention proposes a coal mill oil station control device. Summary of the invention

[0008] The invention provides a coal mill oil station control device, which is used to solve the problems that the loss of any power supply of two power supplies will affect the normal operation of any equipment in the oil system, and the replacement of one component will cause the two oil systems to stop operating.

[0009] The present invention provides a coal mill oil station control device, comprising: a lubricating oil pump assembly, a hydraulic oil pump assembly, a lubricating oil tank heater assembly and a hydraulic oil tank heater assembly; Wherein, the first power supply and the second power supply are respectively connected to the lubricating oil pump assembly, the hydraulic oil pump assembly, the lubricating oil tank heater assembly and the hydraulic oil tank heater assembly; Either one of the first power supply and the second power supply is used as the main power supply, and the other power supply is used as the backup power supply.

[0010] Preferably, the switch between the first power supply and the second power supply is an automatic switching switch; When the circuit powered by the mains operates normally, the circuit powered by the backup power is shut down; When the circuit powered by the main power source does not work normally, the circuit powered by the backup power source is turned on.

[0011] Preferably, one fuse controls one contactor coil.

[0012] Preferably, it also includes: A matrix construction module is used to sequentially collect N test results of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater before leaving the factory, and construct a test matrix, wherein each row vector in the test matrix is ​​a corresponding test result, and the test result is related to the test qualification coefficient of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater, and the value range is (0, 1); A variance calculation module, used for calculating a first variance of each column vector and a second variance of each row vector in the test matrix; a coefficient determination module, for calculating the comprehensive qualified coefficients of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater respectively according to the first variance and the second variance, and setting weight coefficients for the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater respectively in combination with the participating roles of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater in the coal mill; The cycle setting module is used to determine the monitoring cycles of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater and hydraulic oil tank heater according to the weight coefficients, and transmit them to the signal acquisition module to realize the collection of the operating parameters of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater and hydraulic oil tank heater.

[0013] Preferably, the coefficient determination module comprises: Comprehensive calculation unit, used to calculate the comprehensive qualification coefficients of different operating components;

[0014] in, It represents the comprehensive qualified coefficient of the operating component corresponding to the j-th column vector; Indicates that the j-th column vector involves the average value of all elements; Indicates that the j-th column vector involves the variance of all elements; represents the variance threshold of the operating component corresponding to the j-th column vector; Represents the variance of the row vector corresponding to the maximum element value in the j-th column vector; Represents the variance of the row vector corresponding to the minimum element value in the j-th column vector; Among them, when j=1, the corresponding operating component is the lubricating oil pump; When j=2, the corresponding operating component is the hydraulic oil pump; When j = 3, the corresponding operating component is the lubricating oil tank heater; When j=4, the corresponding operating component is the hydraulic oil tank heater.

[0015] Preferably, the coefficient determination module further includes: A correlation analysis unit, used to analyze the correlation between different operating components;

[0016] An importance coefficient calculation unit, used to calculate the initial importance values ​​of different operating components;

[0017]

[0018] A weight determination unit, used to determine weight coefficients of different operating components;

[0019] in, represents the initial importance value of the jth operating component; represents the sum function of the jth running component; represents the association function between the jth operating component and the uth operating component; It represents the normalized value of the participation function corresponding to the j-th running component, and its value range is (0, 1); Represents the weight coefficient of the jth operating component.

[0020] Preferably, it also includes: A target establishment model is used to establish an operation target according to the operation performance requirements of the hydraulic oil pump; A signal processing module, configured to construct an operation matrix for the hydraulic oil pump based on the operation parameters of the hydraulic oil pump at each working moment acquired by the signal acquisition module, wherein each row of the operation matrix represents a time point, and each column corresponds to flow, pressure, temperature, vibration amplitude, and motor current in sequence; A trend analysis module, used to perform data point cluster analysis on the operation matrix, determine data points that deviate from normal clusters, and regard them as first points, and then determine the abnormal influence trend of all first points on the operation target; A range determination model, used to set the value range of the operating parameters in combination with the hardware specifications, working environment and actual application requirements of the hydraulic oil pump; A simulation operation module, used to generate all possible operation parameter combinations using a programming language, and input the operation parameter combinations into a pre-established oil pump performance model for simulation operation, and input corresponding performance index results; A combination screening model is used to screen the best parameter combination and the second best parameter combination based on the matching relationship between each performance indicator result and the operation target; A combination analysis model is used to analyze the abnormal impact trend with the best parameter combination and the second best parameter combination to obtain a final parameter combination; The control working model is used to control the hydraulic oil pump to work accordingly according to the final parameter combination.

[0021] Preferably, the combined analysis model includes: A quantity acquisition unit, used to obtain the variation of each operating parameter under the abnormal influence trend from the trend-parameter comparison table; An addition processing unit, used for performing corresponding addition processing on the best parameter combination and the second best parameter combination according to the variation, to obtain a first combination and a second combination; The screening unit is used to screen the combination with the best performance from the first combination and the second combination, which is regarded as the final combination.

[0022] Compared with the prior art, the present invention has the following beneficial effects: The two power supplies can serve as backup for each other. If any power supply is lost, the normal operation of any equipment in the oil system will not be affected, thus improving the reliability of equipment operation. It is convenient for maintenance, and two oil systems cannot be shut down just to replace one component. It improves the sensitivity of the control circuit fault protection, as the sensitivity of one fuse controlling four contactor coils is too low. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a structural diagram of the working system of two oil pumps in an embodiment of the present invention before modification; Figure 2 It is a structural diagram of the modified working systems of the two oil pumps in the embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention provides a coal mill oil station control device, such as Figure 2 As shown, it includes: a lubricating oil pump assembly, a hydraulic oil pump assembly, a lubricating oil tank heater assembly and a hydraulic oil tank heater assembly; Wherein, the first power supply and the second power supply are respectively connected to the lubricating oil pump assembly, the hydraulic oil pump assembly, the lubricating oil tank heater assembly and the hydraulic oil tank heater assembly; Either one of the first power supply and the second power supply is used as the main power supply, and the other power supply is used as the backup power supply.

[0027] Preferably, the switch between the first power supply and the second power supply is an automatic switching switch; When the circuit powered by the mains operates normally, the circuit powered by the backup power is shut down; When the circuit powered by the main power source does not work normally, the circuit powered by the backup power source is turned on.

[0028] Preferably, one fuse controls one contactor coil.

[0029] In this embodiment, if Figure 2 As shown in the figure, 1QK and 2QK are changed to dual power automatic switching switches.

[0030] During normal operation, only one of the two power supplies 1QK and 2QK is powered, and the other is used as a hot standby. When the working power supply is lost, the standby power supply is automatically put into use, meeting the operating requirements of the oil system equipment, thereby ensuring the reliable operation of the coal mill and solving the problem that the two power supplies cannot serve as backup for each other.

[0031] The control circuits of the oil pump and heater are designed separately and do not interfere with each other. The circuit maintenance of any device (whether it is the power circuit or the control circuit) can be shut down separately without affecting the operation of other devices, solving the problem of inconvenient maintenance.

[0032] Because the insurance of each control circuit is independent and only targets one contactor coil, the protection sensitivity is greatly improved, solving the problem of over-tripping.

[0033] The beneficial effects of the above technical solution are: the two power supplies can serve as backup for each other, and the loss of any power supply will not affect the normal operation of any equipment in the oil system, thereby improving the reliability of equipment operation. It is convenient for maintenance, and the two oil systems cannot be shut down for replacing a component. The sensitivity of the control circuit fault protection is improved, and the sensitivity of one fuse controlling four contactor coils is too low.

[0034] The present invention provides a coal mill oil station control device, which also includes: A matrix construction module is used to sequentially collect N test results of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater before leaving the factory, and construct a test matrix, wherein each row vector in the test matrix is ​​a corresponding test result, and the test result is related to the test qualification coefficient of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater, and the value range is (0, 1); A variance calculation module, used for calculating a first variance of each column vector and a second variance of each row vector in the test matrix; a coefficient determination module, for calculating the comprehensive qualified coefficients of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater respectively according to the first variance and the second variance, and setting weight coefficients for the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater respectively in combination with the participating roles of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater in the coal mill; The cycle setting module is used to determine the monitoring cycles of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater and hydraulic oil tank heater according to the weight coefficients, and transmit them to the signal acquisition module to realize the collection of the operating parameters of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater and hydraulic oil tank heater.

[0035] Preferably, the coefficient determination module comprises: Comprehensive calculation unit, used to calculate the comprehensive qualification coefficients of different operating components;

[0036] in, It represents the comprehensive qualified coefficient of the operating component corresponding to the j-th column vector; Indicates that the j-th column vector involves the average value of all elements; Indicates that the j-th column vector involves the variance of all elements; represents the variance threshold of the operating component corresponding to the j-th column vector; Represents the variance of the row vector corresponding to the maximum element value in the j-th column vector; Represents the variance of the row vector corresponding to the minimum element value in the j-th column vector; Among them, when j=1, the corresponding operating component is the lubricating oil pump; When j=2, the corresponding operating component is the hydraulic oil pump; When j = 3, the corresponding operating component is the lubricating oil tank heater; When j=4, the corresponding operating component is the hydraulic oil tank heater.

[0037] Preferably, the coefficient determination module further includes: A correlation analysis unit, used to analyze the correlation between different operating components;

[0038] An importance coefficient calculation unit, used to calculate the initial importance values ​​of different operating components;

[0039]

[0040] A weight determination unit, used to determine weight coefficients of different operating components;

[0041] in, represents the initial importance value of the jth operating component; represents the sum function of the jth running component; represents the association function between the jth operating component and the uth operating component; It represents the normalized value of the participation function corresponding to the j-th running component, and its value range is (0, 1); Represents the weight coefficient of the jth operating component.

[0042] In this embodiment, the test qualification coefficient is the test result value / test standard value.

[0043] In this embodiment, the participating roles are all pre-set and are known contents, and the standardized values ​​corresponding to the participating roles are obtained from the role-value comparison table. The table includes different participating roles and the standardized values ​​based on the participating roles, and the value range is between 0 and 1.

[0044] In this embodiment, for example, there are component A and component B. If component B will only run based on component A, then component A and component B are actively associated, and component B and component A are passively associated. If component A is unrelated to component B, then it is deemed that component A and component B are not associated.

[0045] In this embodiment, the period may be 0.1 s or 1 s.

[0046] The beneficial effect of the above technical solution is: a test matrix is ​​constructed based on N tests before leaving the factory, and the comprehensive qualification coefficient of each component is calculated by combining the variance of rows and columns in the matrix, and then the weight coefficient is determined in combination with the participating effects, which facilitates periodic monitoring.

[0047] The present invention provides a coal mill oil station control device, which also includes: A target establishment model is used to establish an operation target according to the operation performance requirements of the hydraulic oil pump; A signal processing module, configured to construct an operation matrix for the hydraulic oil pump based on the operation parameters of the hydraulic oil pump at each working moment acquired by the signal acquisition module, wherein each row of the operation matrix represents a time point, and each column corresponds to flow, pressure, temperature, vibration amplitude, and motor current in sequence; A trend analysis module, used to perform data point cluster analysis on the operation matrix, determine data points that deviate from normal clusters, and regard them as first points, and then determine the abnormal influence trend of all first points on the operation target; A range determination model, used to set the value range of the operating parameters in combination with the hardware specifications, working environment and actual application requirements of the hydraulic oil pump; A simulation operation module, used to generate all possible operation parameter combinations using a programming language, and input the operation parameter combinations into a pre-established oil pump performance model for simulation operation, and input corresponding performance index results; A combination screening model is used to screen the best parameter combination and the second best parameter combination based on the matching relationship between each performance indicator result and the operation target; A combination analysis model is used to analyze the abnormal impact trend with the best parameter combination and the second best parameter combination to obtain a final parameter combination; The control working model is used to control the hydraulic oil pump to work accordingly according to the final parameter combination.

[0048] Preferably, the combined analysis model includes: A quantity acquisition unit, used to obtain the variation of each operating parameter under the abnormal influence trend from the trend-parameter comparison table; An addition processing unit, used for performing corresponding addition processing on the best parameter combination and the second best parameter combination according to the variation, to obtain a first combination and a second combination; The screening unit is used to screen the combination with the best performance from the first combination and the second combination, which is regarded as the final combination.

[0049] In this embodiment, the flow rate reflects the amount of oil pumped per unit time, the pressure reflects the pressure generated when the oil is transported, the temperature is related to the heat generated by the pump body and the oil due to friction, the vibration amplitude can determine the smoothness of the pump operation, and the motor current can reflect the load condition of the motor.

[0050] In this embodiment, a clustering algorithm (such as K-means clustering) is used to cluster the data points in the matrix A. Data points in normal working state are usually clustered in one or several specific clusters. If a data point deviates from the normal cluster and enters the abnormal cluster, it can be determined that the working state at that time point is abnormal. For example, under normal circumstances, the flow rate, pressure and other parameters of the lubricating oil pump will fluctuate within a certain range, and the corresponding data points will be clustered together; when a fault such as leakage occurs, the flow rate parameters will change significantly, causing the corresponding data points to deviate from the normal cluster.

[0051] In this embodiment, the operating performance requirements may be maximizing efficiency, minimizing energy consumption, maximizing output flow stability, etc. If efficiency is the main optimization goal, the efficiency calculation method needs to be accurately defined, taking into account factors such as the mechanical efficiency and volumetric efficiency of the oil pump.

[0052] In this embodiment, in the process of setting the value range, for example, the maximum speed of the oil pump cannot exceed its rated speed, and the working pressure must be within the safe pressure range to avoid overpressure causing equipment damage or safety accidents. At the same time, the lower limit of the flow demand is considered to meet the actual work task.

[0053] In this embodiment, for the operating parameter combinations, assuming that the rotational speed has 5 values ​​and the pressure setting value has 4 values, 5×4=20 different parameter combinations will be generated.

[0054] In this embodiment, the model calculates and outputs corresponding performance indicator results based on the input parameters, based on its internal algorithms and data relationships, such as the efficiency, energy consumption, flow fluctuation and other data of the oil pump under the parameter combination, and the oil pump performance model is obtained by training the neural network model with relevant parameter combinations and performance results as samples.

[0055] In this embodiment, the performance indicators under different parameter combinations are compared and analyzed according to the set optimization goal. If the goal is to maximize efficiency, the parameter combination with the highest efficiency and the second highest efficiency are selected.

[0056] In this embodiment, the trend-parameter comparison table includes the impact changes on the operating parameters under different trends, which are all stored in advance.

[0057] In this embodiment, determining the abnormal impact trend of all first points on the operating target includes: determining the operating parameters involved in all first points and the degree of abnormal deviation to determine the impact on the operating target, and then obtaining the abnormal impact trend, for example, whether the impact continues to increase or remains unchanged.

[0058] In this embodiment, the matching relationship refers to the matching between the performance indicator result and the standard indicator result under the operation target.

[0059] The beneficial effect of the above technical solution is: by constructing a matrix of the hydraulic oil pump, the abnormal influence trend between the first point and the target is determined, and the required combination is screened by combining the simulated operation of the operating parameter combination of the oil pump to obtain the final combination, thereby ensuring that the oil pump works as much as possible according to the corresponding target.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal mill oil station control device, characterized in that: include: Lubricating oil pump assembly, hydraulic oil pump assembly, lubricating oil tank heater assembly and hydraulic oil tank heater assembly; Wherein, the first power supply and the second power supply are respectively connected to the lubricating oil pump assembly, the hydraulic oil pump assembly, the lubricating oil tank heater assembly and the hydraulic oil tank heater assembly; Either one of the first power supply and the second power supply is used as the main power supply, and the other power supply is used as the backup power supply.

2. The coal mill oil station control device according to claim 1, characterized in that: The switch between the first power supply and the second power supply is an automatic switching switch; When the circuit powered by the mains operates normally, the circuit powered by the backup power is shut down; When the circuit powered by the main power source does not work normally, the circuit powered by the backup power source is turned on.

3. The coal mill oil station control device according to claim 1, characterized in that: 1 fuse controls 1 contactor coil.

4. The coal mill oil station control device according to claim 1, characterized in that: Also includes: A matrix construction module is used to sequentially collect N test results of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater before leaving the factory, and construct a test matrix, wherein each row vector in the test matrix is ​​a corresponding test result, and the test result is related to the test qualification coefficient of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater, and the value range is (0, 1); A variance calculation module, used for calculating a first variance of each column vector and a second variance of each row vector in the test matrix; a coefficient determination module, for calculating the comprehensive qualified coefficients of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater respectively according to the first variance and the second variance, and setting weight coefficients for the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater respectively in combination with the participating roles of the lubricating oil pump, the hydraulic oil pump, the lubricating oil tank heater, and the hydraulic oil tank heater in the coal mill; The cycle setting module is used to determine the monitoring cycles of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater and hydraulic oil tank heater according to the weight coefficients, and transmit them to the signal acquisition module to realize the collection of the operating parameters of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater and hydraulic oil tank heater.

5. The coal mill oil station control device according to claim 4, characterized in that: The coefficient determination module comprises: Comprehensive calculation unit, used to calculate the comprehensive qualification coefficients of different operating components; in, It represents the comprehensive qualified coefficient of the operating component corresponding to the j-th column vector; Indicates that the j-th column vector involves the average value of all elements; Indicates that the j-th column vector involves the variance of all elements; represents the variance threshold of the operating component corresponding to the j-th column vector; Represents the variance of the row vector corresponding to the maximum element value in the j-th column vector; Represents the variance of the row vector corresponding to the minimum element value in the j-th column vector; Among them, when j=1, the corresponding operating component is the lubricating oil pump; When j=2, the corresponding operating component is the hydraulic oil pump; When j = 3, the corresponding operating component is the lubricating oil tank heater; When j=4, the corresponding operating component is the hydraulic oil tank heater.

6. The coal mill oil station control device according to claim 5, characterized in that: The coefficient determination module further includes: A correlation analysis unit, used to analyze the correlation between different operating components; An importance coefficient calculation unit, used to calculate the initial importance values ​​of different operating components; A weight determination unit, used to determine weight coefficients of different operating components; in, represents the initial importance value of the jth operating component; represents the sum function of the jth running component; represents the association function between the jth operating component and the uth operating component; It represents the normalized value of the participation function corresponding to the j-th running component, and its value range is (0, 1); Represents the weight coefficient of the jth operating component.

7. The coal mill oil station control device according to claim 6, characterized in that: Also includes: A target establishment model is used to establish an operation target according to the operation performance requirements of the hydraulic oil pump; A signal processing module, configured to construct an operation matrix for the hydraulic oil pump based on the operation parameters of the hydraulic oil pump at each working moment acquired by the signal acquisition module, wherein each row of the operation matrix represents a time point, and each column corresponds to flow, pressure, temperature, vibration amplitude, and motor current in sequence; A trend analysis module, used to perform data point cluster analysis on the operation matrix, determine data points that deviate from normal clusters, and regard them as first points, and then determine the abnormal influence trend of all first points on the operation target; A range determination model, used to set the value range of the operating parameters in combination with the hardware specifications, working environment and actual application requirements of the hydraulic oil pump; A simulation operation module, used to generate all possible operation parameter combinations using a programming language, and input the operation parameter combinations into a pre-established oil pump performance model for simulation operation, and input corresponding performance index results; A combination screening model is used to screen the best parameter combination and the second best parameter combination based on the matching relationship between each performance indicator result and the operation target; A combination analysis model is used to analyze the abnormal impact trend with the best parameter combination and the second best parameter combination to obtain a final parameter combination; The control working model is used to control the hydraulic oil pump to work accordingly according to the final parameter combination.

8. The coal mill oil station control device according to claim 7, characterized in that: The combined analysis model comprises: A quantity acquisition unit, used to obtain the variation of each operating parameter under the abnormal influence trend from the trend-parameter comparison table; An addition processing unit, used for performing corresponding addition processing on the best parameter combination and the second best parameter combination according to the variation, to obtain a first combination and a second combination; The screening unit is used to screen the combination with the best performance from the first combination and the second combination, which is regarded as the final combination.

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