Coal mill oil station control apparatus

Abstract

The present invention relates to the technical field of intelligent control, and provides a coal mill oil station control apparatus. The coal mill oil station control apparatus comprises a lubricating oil pump assembly, a hydraulic oil pump assembly, a lubricating oil tank heater assembly, and a hydraulic oil tank heater assembly. A first power supply and a second power supply are each 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 serves as a primary power supply, and the other serves as a standby power supply. Operating reliability of a device is improved and maintenance is facilitated.

Description

A coal mill oil station control device Technical Field

[0001] This invention relates to the field of intelligent control technology, and in particular to a control device for a coal mill oil station. Background Technology

[0002] As a main piece of equipment in a thermal power plant, the coal mill is indispensable. Its stable operation is crucial to the power plant. Typically, the mechanical parts of the coal mill require two oil pumps: a hydraulic oil pump and a lubrication oil pump. These two pumps provide lubrication for the rotating parts of the mill and perform lifting operations. Each pump also has its own oil tank, which contains a heater, forming separate oil systems. The heater is used in low-temperature winter conditions to heat the oil in the tank, preventing excessive viscosity that could affect lubrication and lifting efficiency.

[0003] Figure 1 shows the working system of two existing oil pumps, but it has the following drawbacks:

[0004] One drawback is that both the hydraulic oil pump and the lubricating oil pump are connected to the 1QK power supply. If the 1QK power supply fails, neither the lubricating oil pump nor the hydraulic oil pump will operate. Additionally, the control circuits for the oil pumps and heaters are also connected to the 1QK power supply, which also prevents the heaters from operating. In other words, if the 1QK power supply fails, both oil systems will be unable to operate, and the coal mill must be taken out of service.

[0005] The second drawback is that if 2QK loses power, the oil pump can still run, but the heater cannot.

[0006] The third drawback is that the control power for both the oil pump and the heater is taken from 1QK, which is converted from AC 380V to AC 220V through the control transformer KB. If any control component of the oil pump or heater is damaged and needs to be replaced during operation, the 1R and 2R control fuses need to be opened, which will also cause the oil pump and heater to stop operating, and the coal mill will also have to stop working.

[0007] The fourth disadvantage is that since 1R and 2R carry the four contactor coils of all control circuits, the capacity of the fuse must be selected according to the current of the four coils. This greatly reduces the sensitivity of the protection for each contactor coil, which can easily lead to over-tripping and escalate the accident.

[0008] Because the existing design has the above-mentioned defects and cannot meet the requirements for normal operation, the present invention proposes a coal mill oil station control device. Summary of the Invention

[0009] This invention provides a coal mill oil station control device to solve the problems that the loss of either of the two power sources will affect the normal operation of any equipment in the oil system, and that replacing a single component will cause both oil systems to shut down.

[0010] This 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;

[0011] 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.

[0012] Either the first power supply or the second power supply is used as the main power supply, while the other power supply is used as a backup power supply.

[0013] Preferably, the switch between the first power supply and the second power supply is an automatic switching switch;

[0014] When the main power supply circuit is working normally, the backup power supply circuit is turned off;

[0015] When the main power supply circuit malfunctions, the backup power supply circuit is activated.

[0016] Preferably, one fuse controls one contactor coil.

[0017] Preferred options also include:

[0018] The matrix construction module is used to sequentially collect the N test results of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater before leaving the factory, and construct a test matrix. In the test matrix, each row vector is the corresponding test result, and the test result is related to the test pass coefficient of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater, and the value range is (0, 1).

[0019] The variance calculation module is used to calculate the first variance of each column vector and the second variance of each row vector in the test matrix.

[0020] The coefficient determination module is used to calculate the comprehensive qualification coefficients of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater respectively based on the first variance and the second variance, and to set weight coefficients for the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater respectively in combination with their respective roles in the coal mill.

[0021] The cycle setting module is used to determine the monitoring cycle of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater according to the weight coefficients, and transmit the data to the signal acquisition module to collect the operating parameters of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater.

[0022] Preferably, the coefficient determination module includes:

[0023] The integrated calculation unit is used to calculate the overall pass rate of different operating components;

[0024]

[0025] in, This represents the overall pass / fail coefficient of the operating component corresponding to the j-th column vector; This represents the average of all elements involved in the j-th column vector; This represents the variance of the j-th column vector involving all elements; This represents the variance threshold for the operating component corresponding to the j-th column vector; This represents the variance of the row vector corresponding to the largest element value in the j-th column vector; This represents the variance of the row vector corresponding to the smallest element value in the j-th column vector;

[0026] When j=1, the corresponding operating component is the lubricating oil pump;

[0027] When j=2, the corresponding operating component is a hydraulic oil pump;

[0028] When j=3, the corresponding operating component is the lubricating oil tank heater;

[0029] When j=4, the corresponding operating component is the hydraulic oil tank heater.

[0030] Preferably, the coefficient determination module further includes:

[0031] The correlation analysis unit is used to analyze the correlation between different operating components;

[0032]

[0033] Importance coefficient calculation unit, used to calculate the initial importance value of different operating components;

[0034]

[0035]

[0036] The weight determination unit is used to determine the weight coefficients of different operating components;

[0037]

[0038] in, This represents the initial importance value of the j-th running component; This represents the summation function for the j-th running component; This represents the association function between the j-th running component and the u-th running component; This represents the standardized value of the contribution of the j-th operating component, with a value range of (0, 1). This represents the weight coefficient of the j-th running component.

[0039] Preferred options also include:

[0040] A target model is established to create operational targets based on the performance requirements of the hydraulic pump.

[0041] The signal processing module is used to construct an operation matrix for the hydraulic pump based on the operating parameters of the hydraulic pump at each working moment collected by the signal acquisition module. Each row of the operation matrix represents a time point, and each column corresponds to the flow rate, pressure, temperature, vibration amplitude and motor current respectively.

[0042] The trend analysis module is used to perform data point clustering analysis on the operation matrix, identify data points that deviate from the normal clusters and regard them as the first points, and then determine the abnormal influence trend of all the first points on the operation target;

[0043] The range determination model is used to set the range of values ​​for the operating parameters by combining the hardware specifications, working environment and actual application requirements of the hydraulic pump.

[0044] The simulation operation module is used to generate all possible combinations of operating parameters using a programming language, input the combinations of operating parameters into a pre-established oil pump performance model for simulation operation, and input the corresponding performance index results.

[0045] A combined screening model is used to screen the best parameter combination and the second best parameter combination based on the matching relationship between the results of each performance indicator and the running target.

[0046] A combined analysis model is used to analyze the abnormal influence trend with the optimal parameter combination and the second-best parameter combination, respectively, to obtain the final parameter combination;

[0047] A control working model is used to control the hydraulic oil pump to perform corresponding operations according to the final parameter combination.

[0048] Preferably, the combined analysis model includes:

[0049] The quantity acquisition unit is used to obtain the change in each operating parameter under the influence trend of the abnormality from the trend-parameter lookup table;

[0050] An addition processing unit is used to perform corresponding addition processing on the optimal parameter combination and the second optimal parameter combination according to the change amount, to obtain the first combination and the second combination;

[0051] The filtering unit is used to select the best-performing combination from the first combination and the second combination, which is regarded as the final combination.

[0052] Compared with the prior art, the beneficial effects of this application are as follows:

[0053] The two power supplies can serve as backups for each other; the loss of either power supply will not affect the normal operation of any equipment in the oil system, thus improving equipment reliability. Maintenance is convenient; replacing a single component will not require shutting down both oil systems. The sensitivity of the control circuit's fault protection is improved; a single fuse controlling four contactor coils has insufficient sensitivity. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0055] Figure 1 is a structural diagram of the working system of the two oil pumps in an embodiment of the present invention before modification;

[0056] Figure 2 is a structural diagram of the modified working system of the two oil pumps in an embodiment of the present invention. Embodiments of the present invention

[0057] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0058] The present invention provides a coal mill oil station control device, as shown in Figure 2, including: a lubricating oil pump assembly, a hydraulic oil pump assembly, a lubricating oil tank heater assembly, and a hydraulic oil tank heater assembly;

[0059] 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.

[0060] Either the first power supply or the second power supply is used as the main power supply, while the other power supply is used as a backup power supply.

[0061] Preferably, the switch between the first power supply and the second power supply is an automatic switching switch;

[0062] When the main power supply circuit is working normally, the backup power supply circuit is turned off;

[0063] When the main power supply circuit malfunctions, the backup power supply circuit is activated.

[0064] Preferably, one fuse controls one contactor coil.

[0065] In this embodiment, as shown in Figure 2, 1QK and 2QK are replaced with dual power supply automatic switching switches.

[0066] During normal operation, only one of the 1QK and 2QK power supplies is in operation, with the other serving as a hot standby. When the working power supply is lost, the standby power supply is automatically activated, meeting the operational requirements of the oil system equipment and ensuring the reliable operation of the coal mill. This solves the problem that the two power supplies cannot serve as backups for each other.

[0067] The control circuits for the oil pump and heater are designed separately and do not interfere with each other. The circuit maintenance of any equipment (whether it is the power circuit or the control circuit) can be carried out by shutting down the power supply separately without affecting the operation of other equipment, thus solving the problem of inconvenient maintenance.

[0068] Because each control circuit has its own fuse, which only needs to be applied to one contactor coil, the protection sensitivity is greatly improved, and the problem of cascading tripping is solved.

[0069] The beneficial effects of the above technical solution are: the two power supplies can serve as backups for each other, and the loss of either power supply will not affect the normal operation of any equipment in the oil system, thus improving equipment reliability. Maintenance is convenient, as replacing a single component will not require shutting down both oil systems. The sensitivity of the control circuit fault protection is improved, as the sensitivity of controlling four contactor coils with a single fuse is too low.

[0070] This invention provides a coal mill oil station control device, which further includes:

[0071] The matrix construction module is used to sequentially collect the N test results of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater before leaving the factory, and construct a test matrix. In the test matrix, each row vector is the corresponding test result, and the test result is related to the test pass coefficient of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater, and the value range is (0, 1).

[0072] The variance calculation module is used to calculate the first variance of each column vector and the second variance of each row vector in the test matrix.

[0073] The coefficient determination module is used to calculate the comprehensive qualification coefficients of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater respectively based on the first variance and the second variance, and to set weight coefficients for the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater respectively in combination with their respective roles in the coal mill.

[0074] The cycle setting module is used to determine the monitoring cycle of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater according to the weight coefficients, and transmit the data to the signal acquisition module to collect the operating parameters of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater.

[0075] Preferably, the coefficient determination module includes:

[0076] The integrated calculation unit is used to calculate the overall pass rate of different operating components;

[0077]

[0078] in, This represents the overall pass / fail coefficient of the operating component corresponding to the j-th column vector; This represents the average of all elements involved in the j-th column vector; This represents the variance of the j-th column vector involving all elements; This represents the variance threshold for the operating component corresponding to the j-th column vector; This represents the variance of the row vector corresponding to the largest element value in the j-th column vector; This represents the variance of the row vector corresponding to the smallest element value in the j-th column vector;

[0079] When j=1, the corresponding operating component is the lubricating oil pump;

[0080] When j=2, the corresponding operating component is a hydraulic oil pump;

[0081] When j=3, the corresponding operating component is the lubricating oil tank heater;

[0082] When j=4, the corresponding operating component is the hydraulic oil tank heater.

[0083] Preferably, the coefficient determination module further includes:

[0084] The correlation analysis unit is used to analyze the correlation between different operating components;

[0085]

[0086] Importance coefficient calculation unit, used to calculate the initial importance value of different operating components;

[0087]

[0088]

[0089] The weight determination unit is used to determine the weight coefficients of different operating components;

[0090]

[0091] in, This represents the initial importance value of the j-th running component; This represents the summation function for the j-th running component; This represents the association function between the j-th running component and the u-th running component; This represents the standardized value of the contribution of the j-th operating component, with a value range of (0, 1). This represents the weight coefficient of the j-th running component.

[0092] In this embodiment, the test pass coefficient is the test result value / test standard value.

[0093] In this embodiment, the participating actions are all pre-set and belong to known content. The standardized value corresponding to the participating action is obtained from the action-value lookup table. The table contains different participating actions and the standardized value based on the participating action, and the value range is between 0 and 1.

[0094] In this embodiment, for example, there are component A and component B. If component B only runs on the basis of component A, then component A and component B have an active association, and component B and component A have a passive association. If component A and component B are unrelated, then it is considered that component A and component B have no association.

[0095] In this embodiment, the period can be 0.1s or 1s.

[0096] The beneficial effects of the above technical solution are: based on N tests before leaving the factory, a test matrix is ​​constructed, and the variance of the rows and columns in the matrix is ​​combined to calculate the comprehensive qualification coefficient of each component, and then the weight coefficient is determined by combining the participation effect, which provides convenience for periodic monitoring.

[0097] This invention provides a coal mill oil station control device, which further includes:

[0098] A target model is established to create operational targets based on the performance requirements of the hydraulic pump.

[0099] The signal processing module is used to construct an operation matrix for the hydraulic pump based on the operating parameters of the hydraulic pump at each working moment collected by the signal acquisition module. Each row of the operation matrix represents a time point, and each column corresponds to the flow rate, pressure, temperature, vibration amplitude and motor current respectively.

[0100] The trend analysis module is used to perform data point clustering analysis on the operation matrix, identify data points that deviate from the normal clusters and regard them as the first points, and then determine the abnormal influence trend of all the first points on the operation target;

[0101] The range determination model is used to set the range of values ​​for the operating parameters by combining the hardware specifications, working environment and actual application requirements of the hydraulic pump.

[0102] The simulation operation module is used to generate all possible combinations of operating parameters using a programming language, input the combinations of operating parameters into a pre-established oil pump performance model for simulation operation, and input the corresponding performance index results.

[0103] A combined screening model is used to screen the best parameter combination and the second best parameter combination based on the matching relationship between the results of each performance indicator and the running target.

[0104] A combined analysis model is used to analyze the abnormal influence trend with the optimal parameter combination and the second-best parameter combination, respectively, to obtain the final parameter combination;

[0105] A control working model is used to control the hydraulic oil pump to perform corresponding operations according to the final parameter combination.

[0106] Preferably, the combined analysis model includes:

[0107] The quantity acquisition unit is used to obtain the change in each operating parameter under the influence trend of the abnormality from the trend-parameter lookup table;

[0108] An addition processing unit is used to perform corresponding addition processing on the optimal parameter combination and the second optimal parameter combination according to the change amount, to obtain the first combination and the second combination;

[0109] The filtering unit is used to select the best-performing combination from the first combination and the second combination, which is regarded as the final combination.

[0110] In this embodiment, the flow rate reflects the amount of oil pumped per unit time, the pressure reflects the pressure generated when conveying the oil, the temperature relates 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.

[0111] In this embodiment, a clustering algorithm (such as K-means clustering) is used to cluster the data points in matrix A. Data points in normal working condition usually cluster in one or a few specific clusters. If a data point deviates from the normal cluster and enters an abnormal cluster, it can be determined that the working condition at that point in time is abnormal. For example, under normal circumstances, parameters such as flow rate and pressure of the lubricating oil pump will fluctuate within a certain range, and the corresponding data points will cluster together; when a fault such as leakage occurs, the flow rate parameter will change significantly, causing the corresponding data point to deviate from the normal cluster.

[0112] In this embodiment, the operational performance requirements can be maximizing efficiency, minimizing energy consumption, and maximizing output flow stability. If efficiency is the primary optimization objective, the efficiency calculation method needs to be precisely defined, taking into account factors such as the mechanical efficiency and volumetric efficiency of the oil pump.

[0113] In this embodiment, during the setting of value ranges, 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 leading to equipment damage or safety accidents. At the same time, the lower limit of flow rate requirements is considered to meet actual work tasks.

[0114] In this embodiment, for the combination of operating parameters, assuming there are 5 possible values ​​for the rotational speed and 4 possible values ​​for the pressure setpoint, 5 × 4 = 20 different parameter combinations will be generated.

[0115] In this embodiment, the model calculates and outputs corresponding performance index results based on the input parameters, its internal algorithm and data relationships, such as the efficiency, energy consumption, and flow fluctuation of the oil pump under the parameter combination. The oil pump performance model is obtained by training the neural network model with relevant parameter combinations and performance results as samples.

[0116] In this embodiment, performance indicators under different parameter combinations are compared and analyzed based on the set optimization objectives. If the goal is to maximize efficiency, the parameter combinations with the highest and second-highest efficiency are selected.

[0117] In this embodiment, the trend-parameter comparison table includes the changes in the impact of different trends on the operating parameters, and all of these are stored in advance.

[0118] 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, so as to determine the impact on the operating target, and then obtaining the abnormal impact trend, such as whether the impact continues to increase or the impact remains unchanged.

[0119] In this embodiment, the matching relationship refers to the matching situation between the performance index results and the standard index results under the operating target.

[0120] The beneficial effects of the above technical solution are: by constructing a matrix of hydraulic oil pumps, the abnormal influence trend between the first point and the target is determined, and the required combination is screened by simulating the operation of the oil pump's operating parameters, thereby obtaining the final combination, ensuring that the oil pump works as close to the corresponding target as possible.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate 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; 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 the first power supply or the second power supply is used as the main power supply, while the other power supply is used as a backup power supply.

2. The coal mill oil station control device according to claim 1, characterized in that, The switches for the first power supply and the second power supply are automatic switching switches; When the main power supply circuit is working normally, the backup power supply circuit is turned off; When the main power supply circuit malfunctions, the backup power supply circuit is activated.

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

4. The coal mill oil station control device according to claim 1, characterized in that, Also includes: The matrix construction module is used to sequentially collect the N test results of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater before leaving the factory, and construct a test matrix. In the test matrix, each row vector is the corresponding test result, and the test result is related to the test pass coefficient of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater, and the value range is (0, 1). The variance calculation module is used to calculate the first variance of each column vector and the second variance of each row vector in the test matrix. The coefficient determination module is used to calculate the comprehensive qualification coefficients of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater respectively based on the first variance and the second variance, and to set weight coefficients for the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater respectively in combination with their respective roles in the coal mill. The cycle setting module is used to determine the monitoring cycle of the lubricating oil pump, hydraulic oil pump, lubricating oil tank heater, and hydraulic oil tank heater according to the weight coefficients, and transmit the data to the signal acquisition module to collect 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 includes: The integrated calculation unit is used to calculate the overall pass rate of different operating components; in, This represents the overall pass / fail coefficient of the operating component corresponding to the j-th column vector; This represents the average of all elements involved in the j-th column vector; This represents the variance of the j-th column vector involving all elements; This represents the variance threshold for the operating component corresponding to the j-th column vector; This represents the variance of the row vector corresponding to the largest element value in the j-th column vector; This represents the variance of the row vector corresponding to the smallest element value in the j-th column vector; When j=1, the corresponding operating component is the lubricating oil pump; When j=2, the corresponding operating component is a 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: The correlation analysis unit is used to analyze the correlation between different operating components; Importance coefficient calculation unit, used to calculate the initial importance value of different operating components; The weight determination unit is used to determine the weight coefficients of different operating components; in, This represents the initial importance value of the j-th running component; This represents the summation function for the j-th running component; This represents the association function between the j-th running component and the u-th running component; This represents the standardized value of the contribution of the j-th operating component, with a value range of (0, 1). This represents the weight coefficient of the j-th running component.

7. The coal mill oil station control device according to claim 6, characterized in that, Also includes: A target model is established to create operational targets based on the performance requirements of the hydraulic pump. The signal processing module is used to construct an operation matrix for the hydraulic pump based on the operating parameters of the hydraulic pump at each working moment acquired by the signal acquisition module. Each row of the operation matrix represents a time point, and each column corresponds to the flow rate, pressure, temperature, vibration amplitude, and motor current, respectively. The trend analysis module is used to perform data point clustering analysis on the operation matrix, identify data points that deviate from the normal clusters and regard them as the first points, and then determine the abnormal influence trend of all the first points on the operation target; The range determination model is used to set the range of values ​​for the operating parameters by combining the hardware specifications, working environment and actual application requirements of the hydraulic oil pump. The simulation operation module is used to generate all possible combinations of operating parameters using a programming language, input the combinations of operating parameters into a pre-established oil pump performance model for simulation operation, and input the corresponding performance index results. A combined screening model is used to screen the best parameter combination and the second best parameter combination based on the matching relationship between the results of each performance indicator and the running target. A combined analysis model is used to analyze the abnormal influence trend with the optimal parameter combination and the second-best parameter combination, respectively, to obtain the final parameter combination; A control working model is used to control the hydraulic oil pump to perform corresponding operations 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 includes: The quantity acquisition unit is used to obtain the change in each operating parameter under the influence trend of the abnormality from the trend-parameter lookup table; An addition processing unit is used to perform corresponding addition processing on the optimal parameter combination and the second optimal parameter combination according to the change amount, to obtain the first combination and the second combination; The filtering unit is used to select the best-performing combination from the first combination and the second combination, which is regarded as the final combination.

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