Converter water cooling system water replenishing control method

Abstract

The invention discloses a converter water cooling system water replenishing control method, which comprises the steps of setting a plurality of monitoring points according to parameters of a pressure storage tank, acquiring pressure data of each monitoring point according to a preset acquisition time node, and generating an operation evaluation value; setting a first water replenishing control strategy and a feedback time interval according to the operation evaluation value, and collecting pressure change data and operation data according to the feedback time interval; generating application difference characteristics according to the pressure change data and the operation data, and obtaining a plurality of second water replenishing control strategies according to the application difference characteristics and a preset correction model; the second water supplementing control strategy is simulated to obtain simulation application difference characteristics, the simulation application difference characteristics are analyzed, the optimal water supplementing control strategy is screened out, and the water supplementing efficiency of the water supplementing system and the operation efficiency of the water cooling system are improved by correcting or adjusting the water supplementing control strategies; and the fault probability of the converter and the wind turbine generator is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of converters, and in particular to a method for controlling water replenishment of a converter water cooling system. Background Art

[0002] The inverter of a wind turbine usually uses a water cooling system for heat dissipation. Once the water cooling system fails, the heat generated during the operation of the inverter will accumulate in the equipment, causing the equipment to shut down.

[0003] The main cause of inverter water cooling system failure is that the pressure storage tank cannot stabilize the pressure, causing the water cooling system pressure to be too low or too high. The traditional manual water adding method cannot promptly detect whether the pressure storage tank pressure is stable, as well as the operating effect of the water cooling system, resulting in inverter failure and affecting the normal operation of the wind turbine. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a water replenishment control method for a converter water cooling system, which analyzes the pressure data of a pressure storage tank to obtain an operation evaluation value and determine a first water replenishment control strategy, generates application difference characteristics of the first water replenishment control strategy for the pressure change data of the monitoring point after the first water replenishment control strategy and the operation data of the water cooling system, and combines with a preset correction model to obtain multiple second water replenishment control strategies, simulates the multiple second water replenishment control strategies, and obtains an optimal water replenishment control strategy, and through the correction or adjustment of the water replenishment control strategy, improves the water replenishment efficiency of the water replenishment system and the operation efficiency of the water cooling system, and reduces the failure probability of the converter and the wind turbine.

[0005] In some embodiments of the present application, a method for controlling water replenishment of a converter water cooling system is provided, comprising:

[0006] Set multiple monitoring points according to the pressure storage tank parameters, obtain the pressure data of each monitoring point according to the preset collection time node, and generate the operation evaluation value of the corresponding monitoring point;

[0007] A first water replenishment control strategy and a feedback time interval of the water replenishment system are set according to the multiple operation evaluation values, the water cooling system is replenished according to the first water replenishment control strategy, and the pressure change data of each monitoring point and the operation data of the water cooling system are collected according to the feedback time interval;

[0008] Generate application difference characteristics of a first water replenishment control strategy according to a plurality of pressure change data and operation data, and obtain a plurality of second water replenishment control strategies according to the application difference characteristics and a preset correction model;

[0009] A plurality of second water replenishment control strategies are simulated to obtain simulation application difference characteristics of each second water replenishment control strategy, and a plurality of simulation application difference characteristics are analyzed to screen out an optimal water replenishment control strategy.

[0010] In some embodiments of the present application, generating an operation evaluation value of a corresponding monitoring point includes:

[0011] Acquire pressure data of each monitoring point according to a preset collection time node, compare the pressure data with corresponding standard pressure data, and generate a first evaluation value according to the comparison result;

[0012] Subtract the pressure data of the current preset acquisition time node from the historical pressure data of the previous adjacent preset acquisition time node to obtain a pressure data fluctuation value, and set a compensation coefficient according to the pressure data fluctuation value;

[0013] The first evaluation value of the corresponding monitoring point is corrected according to the compensation coefficient to obtain the operation evaluation value of the corresponding monitoring point.

[0014] In some embodiments of the present application, a first water replenishment control strategy of the water replenishment system is set according to a plurality of operation evaluation values, including:

[0015] Perform average processing on the operation evaluation values ​​of all monitoring points to obtain a comprehensive operation evaluation value;

[0016] Setting a first water replenishment control strategy and a feedback time interval according to the comprehensive operation evaluation value, wherein the first water replenishment control strategy includes a water replenishment amount and a water replenishment duration;

[0017] Presetting a first preset comprehensive operation evaluation value interval, a second preset comprehensive operation evaluation value interval, a third preset comprehensive operation evaluation value interval and a fourth preset comprehensive operation evaluation value interval;

[0018] When the comprehensive operation evaluation value is within the first preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the fourth preset water replenishment amount, and the water replenishment duration is set to the fourth preset water replenishment duration;

[0019] When the comprehensive operation evaluation value is within the second preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the third preset water replenishment amount, and the water replenishment duration is set to the third preset water replenishment duration;

[0020] When the comprehensive operation evaluation value is within the third preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the second preset water replenishment amount, and the water replenishment duration is set to the second preset water replenishment duration;

[0021] When the comprehensive operation evaluation value is in the fourth preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the first preset water replenishment amount, and the water replenishment duration is set to the first preset water replenishment duration.

[0022] In some embodiments of the present application, setting the feedback time interval according to the comprehensive operation evaluation value includes:

[0023] Presetting a first preset feedback time interval, a second preset feedback time interval, a third preset feedback time interval and a fourth preset feedback time interval;

[0024] When the comprehensive operation evaluation value is within the first preset comprehensive evaluation value interval, setting the feedback time interval to the first preset feedback time interval;

[0025] When the comprehensive operation evaluation value is within the second preset comprehensive evaluation value interval, setting the feedback time interval to the second preset feedback time interval;

[0026] When the comprehensive operation evaluation value is within the third preset comprehensive evaluation value interval, setting the feedback time interval to the third preset feedback time interval;

[0027] When the comprehensive operation evaluation value is in the fourth preset comprehensive evaluation value interval, the feedback time interval is set to the fourth preset feedback time interval.

[0028] In some embodiments of the present application, the application difference characteristics of the first water replenishment control strategy are generated according to a plurality of pressure change data and operation data, including:

[0029] Replenish water to the water cooling system according to the first water replenishment control strategy set by the comprehensive operation evaluation value, and obtain multiple pressure change data of each monitoring point and operation data of the water cooling system according to the corresponding feedback time interval;

[0030] Generate the change trend, change rate and change stability of the pressure data of the corresponding monitoring point according to the multiple pressure change data of each monitoring point, and generate the change characteristics of each monitoring point according to the change trend, change rate and change stability;

[0031] Pre-set multiple evaluation indicators of the water cooling system;

[0032] According to the correlation between the operation data of the water cooling system and the evaluation index, the relevant operation data of each evaluation index is determined, and the relevant operation data is compared with the standard operation data of the corresponding evaluation index, and the index evaluation value of the corresponding evaluation index is generated according to the comparison result;

[0033] Generate an indicator feature of each evaluation indicator according to the indicator evaluation value of each evaluation indicator;

[0034] Constructing the application characteristics of the current first water replenishment control strategy according to the change characteristics of all monitoring points and the indicator characteristics of all evaluation indicators, and constructing the preset standard application characteristics according to the preset standard change characteristics of all monitoring points corresponding to the current first water replenishment control strategy and the preset standard indicator characteristics of all evaluation indicators;

[0035] The application characteristic difference of the current first water replenishment control strategy is generated according to the application characteristic and the preset standard application characteristic.

[0036] In some embodiments of the present application, multiple second water replenishment control strategies are obtained according to application difference characteristics and a preset correction model, including:

[0037] The application difference characteristics include the change characteristic differences of all monitoring points and the indicator characteristic differences of all evaluation indicators;

[0038] A first-level difference degree reference interval and a second-level difference degree reference interval are preset, and each first-level difference degree reference interval and the second-level difference degree reference interval are mapped with a preset correction ratio interval;

[0039] Calculate the difference degree of the change characteristic differences of all monitoring points and obtain a first difference degree, compare the first difference degree with the first-level difference degree reference interval, screen out the first-level difference degree reference interval with the greatest similarity, and set the preset correction ratio of the screened first-level difference degree reference interval as the first correction ratio interval;

[0040] Calculate the difference degree of the indicator characteristic differences of all evaluation indicators and obtain the second difference degree, compare the second difference degree with the secondary difference degree reference interval, screen out the secondary difference degree reference interval with the greatest similarity, and set the preset correction ratio of the screened secondary difference degree reference interval as the second correction ratio interval;

[0041] Determine a comprehensive correction ratio interval according to the first correction ratio interval and the second correction ratio interval;

[0042] Based on the comprehensive correction ratio interval and the preset correction model, the water replenishment amount and water replenishment duration in the first water replenishment control strategy are corrected to generate multiple correction schemes;

[0043] The first water replenishment control strategy is modified according to multiple correction schemes to obtain multiple second water replenishment control strategies.

[0044] In some embodiments of the present application, the calculation formula of the first difference degree is:

[0045]

[0046] Among them, H1 is the first difference degree, c1 is the first difference degree conversion coefficient, n is the number of all monitoring points, △bi is the change characteristic difference of the i-th monitoring point, and a1 is the change characteristic difference adjustment constant;

[0047] The calculation formula of the second difference degree is:

[0048]

[0049] Among them, H2 is the second difference degree, c2 is the second difference degree conversion coefficient, m is the number of all evaluation indicators, △zi is the indicator characteristic difference of the i-th evaluation indicator, and a2 is the indicator characteristic difference adjustment constant.

[0050] In some embodiments of the present application, multiple second water replenishment control strategies are simulated to obtain simulation application difference characteristics of each second water replenishment control strategy, including:

[0051] Construct a static simulation scenario based on the location information and connection structure of the equipment involved in the water cooling system and water replenishment system;

[0052] Obtain the corresponding water replenishment amount and water replenishment duration to be set from each second water replenishment control strategy, and establish a dynamic relationship between the water replenishment amount, water replenishment duration, pressure change data, and operation data at the same dynamic node according to the operating relationship between the water replenishment amount and water replenishment duration and the pressure change data and operation data of each monitoring point and the operation data of the water cooling system;

[0053] The dynamic relationship and the static simulation scene are connected in position to construct a simulation model of multiple second water replenishment control strategies;

[0054] Determine a corresponding feedback time interval according to each second water replenishment control strategy, and obtain a simulation application feature in a corresponding simulation model according to the corresponding feedback time interval, wherein the simulation application feature includes a plurality of simulation change features and simulation index features;

[0055] The simulated application characteristics are subtracted from the standard application characteristics corresponding to the second water replenishment control strategy to obtain the simulated application characteristic differences, wherein the simulated application characteristic differences include a number of simulated change characteristic differences and simulation index characteristic differences.

[0056] In some embodiments of the present application, the difference characteristics of multiple simulation applications are analyzed to screen out the optimal water replenishment control strategy, including:

[0057] Calculate the degree of difference of several simulation change characteristic differences and simulation index characteristic differences in the simulation application characteristic difference of each second water replenishment control strategy to obtain a simulation first difference degree and a simulation second difference degree;

[0058] Generate a simulation comprehensive difference degree according to the simulation first difference degree and the simulation second difference degree and corresponding weight coefficients;

[0059] The calculation formula of the simulation comprehensive difference degree is:

[0060] F0=f1×v1+f2×v2;

[0061] Among them, F0 is the simulation comprehensive difference degree, f1 is the simulation first difference degree, v1 is the first weight coefficient, f2 is the simulation second difference degree, v2 is the second weight coefficient;

[0062] The second water replenishment control strategy with the smallest simulation comprehensive difference is set as the optimal water replenishment control strategy.

[0063] Compared with the prior art, the method for controlling water replenishment of a converter water cooling system according to the embodiment of the present application has the following beneficial effects:

[0064] By analyzing the pressure data of the pressure storage tank, an operation evaluation value is obtained and a first water replenishment control strategy is determined. The application difference characteristics of the first water replenishment control strategy are generated from the pressure change data of the monitoring point after the first water replenishment control strategy and the operation data of the water cooling system. In combination with a preset correction model, multiple second water replenishment control strategies are obtained. The multiple second water replenishment control strategies are simulated to obtain an optimal water replenishment control strategy. By correcting or adjusting the water replenishment control strategy, the water replenishment efficiency of the water replenishment system and the operation efficiency of the water cooling system are improved, and the failure probability of the converter and the wind turbine are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a flow chart of a method for controlling water replenishment of a converter water cooling system in a preferred embodiment of the present application. DETAILED DESCRIPTION

[0066] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0067] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0068] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0069] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0070] like Figure 1 As shown, a water replenishment control method for a converter water cooling system according to a preferred embodiment of the present application includes:

[0071] Step S101: setting multiple monitoring points according to the pressure storage tank parameters, obtaining the pressure data of each monitoring point according to the preset collection time node, and generating the operation evaluation value of the corresponding monitoring point;

[0072] Step S102: setting a first water replenishment control strategy and a feedback time interval of the water replenishment system according to the multiple operation evaluation values, replenishing the water cooling system according to the first water replenishment control strategy, and collecting pressure change data of each monitoring point and operation data of the water cooling system according to the feedback time interval;

[0073] Step S103: generating application difference characteristics of the first water replenishment control strategy according to the plurality of pressure change data and the operation data, and obtaining a plurality of second water replenishment control strategies according to the application difference characteristics and the preset correction model;

[0074] Step S104: simulating multiple second water replenishment control strategies to obtain simulation application difference characteristics of each second water replenishment control strategy, analyzing multiple simulation application difference characteristics, and screening out the optimal water replenishment control strategy.

[0075] In this embodiment, the water replenishment system is connected to the water cooling system. The water replenishment system includes a water replenishment tank and a water replenishment pipe. Water is replenished to the water cooling system through the water replenishment system, thereby maintaining a constant pressure in the water cooling system. The wind turbine will not be shut down due to low or high pressure in the pressure storage tank, thereby improving the utilization rate of the wind turbine and reducing the probability of failure.

[0076] In some embodiments of the present application, generating an operation evaluation value of a corresponding monitoring point includes:

[0077] Acquire pressure data of each monitoring point according to a preset collection time node, compare the pressure data with corresponding standard pressure data, and generate a first evaluation value according to the comparison result;

[0078] Subtract the pressure data of the current preset acquisition time node from the historical pressure data of the previous adjacent preset acquisition time node to obtain a pressure data fluctuation value, and set a compensation coefficient according to the pressure data fluctuation value;

[0079] The first evaluation value of the corresponding monitoring point is corrected according to the compensation coefficient to obtain the operation evaluation value of the corresponding monitoring point.

[0080] In this embodiment, when the pressure data fluctuation value is larger, the compensation coefficient is smaller, and vice versa. The value range of the compensation coefficient is (0, 1).

[0081] In this embodiment, when the difference between the pressure data and the standard pressure data is greater, the first evaluation value is smaller, and vice versa. The operation evaluation value is obtained by the first evaluation value and the compensation coefficient, laying the foundation for the subsequent setting of the first water replenishment control strategy.

[0082] In some embodiments of the present application, a first water replenishment control strategy of the water replenishment system is set according to a plurality of operation evaluation values, including:

[0083] Perform average processing on the operation evaluation values ​​of all monitoring points to obtain a comprehensive operation evaluation value;

[0084] Setting a first water replenishment control strategy and a feedback time interval according to the comprehensive operation evaluation value, wherein the first water replenishment control strategy includes a water replenishment amount and a water replenishment duration;

[0085] Presetting a first preset comprehensive operation evaluation value interval, a second preset comprehensive operation evaluation value interval, a third preset comprehensive operation evaluation value interval and a fourth preset comprehensive operation evaluation value interval;

[0086] When the comprehensive operation evaluation value is within the first preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the fourth preset water replenishment amount, and the water replenishment duration is set to the fourth preset water replenishment duration;

[0087] When the comprehensive operation evaluation value is within the second preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the third preset water replenishment amount, and the water replenishment duration is set to the third preset water replenishment duration;

[0088] When the comprehensive operation evaluation value is within the third preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the second preset water replenishment amount, and the water replenishment duration is set to the second preset water replenishment duration;

[0089] When the comprehensive operation evaluation value is in the fourth preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the first preset water replenishment amount, and the water replenishment duration is set to the first preset water replenishment duration.

[0090] In this embodiment, the first preset comprehensive operation evaluation value interval is less than the second preset comprehensive operation evaluation value interval is less than the third preset comprehensive operation evaluation value interval is less than the fourth preset comprehensive operation evaluation value interval, the first preset water replenishment amount is less than the second preset water replenishment amount is less than the third preset water replenishment amount is less than the fourth preset water replenishment amount, and the first preset water replenishment time is less than the second preset water replenishment time is less than the third preset water replenishment time is less than the fourth preset water replenishment time.

[0091] In this embodiment, when the preset comprehensive evaluation value interval of the comprehensive operation evaluation value is smaller, it means that the pressure in the pressure storage tank is more unstable, and a larger amount of water replenishment and a longer duration are required; when the preset comprehensive evaluation value interval of the comprehensive operation evaluation value is larger, it means that the pressure in the pressure storage tank is more stable, and a smaller amount of water replenishment and a shorter duration are required.

[0092] In some embodiments of the present application, setting the feedback time interval according to the comprehensive operation evaluation value includes:

[0093] Presetting a first preset feedback time interval, a second preset feedback time interval, a third preset feedback time interval and a fourth preset feedback time interval;

[0094] When the comprehensive operation evaluation value is within the first preset comprehensive evaluation value interval, setting the feedback time interval to the first preset feedback time interval;

[0095] When the comprehensive operation evaluation value is within the second preset comprehensive evaluation value interval, setting the feedback time interval to the second preset feedback time interval;

[0096] When the comprehensive operation evaluation value is within the third preset comprehensive evaluation value interval, setting the feedback time interval to the third preset feedback time interval;

[0097] When the comprehensive operation evaluation value is in the fourth preset comprehensive evaluation value interval, the feedback time interval is set to the fourth preset feedback time interval.

[0098] In this embodiment, the first preset feedback time interval < the second preset feedback time interval < the third preset feedback time interval < the fourth preset feedback time interval.

[0099] In this embodiment, when the preset comprehensive evaluation value interval of the comprehensive operation evaluation value is larger, it means that the current pressure storage tank pressure is more stable, the water cooling system is less likely to fail, and the feedback time interval can be larger; when the preset comprehensive evaluation value interval of the comprehensive operation evaluation value is smaller, it means that the current pressure storage tank pressure is more unstable, the water cooling system is more likely to fail, and the feedback time interval should be smaller, so as to timely judge whether the water cooling system has a fault and configure the corresponding adjustment strategy.

[0100] In some embodiments of the present application, the application difference characteristics of the first water replenishment control strategy are generated according to a plurality of pressure change data and operation data, including:

[0101] Replenish water to the water cooling system according to the first water replenishment control strategy set by the comprehensive operation evaluation value, and obtain multiple pressure change data of each monitoring point and operation data of the water cooling system according to the corresponding feedback time interval;

[0102] Generate the change trend, change rate and change stability of the pressure data of the corresponding monitoring point according to the multiple pressure change data of each monitoring point, and generate the change characteristics of each monitoring point according to the change trend, change rate and change stability;

[0103] Pre-set multiple evaluation indicators of the water cooling system;

[0104] According to the correlation between the operation data of the water cooling system and the evaluation index, the relevant operation data of each evaluation index is determined, and the relevant operation data is compared with the standard operation data of the corresponding evaluation index, and the index evaluation value of the corresponding evaluation index is generated according to the comparison result;

[0105] Generate an indicator feature of each evaluation indicator according to the indicator evaluation value of each evaluation indicator;

[0106] Constructing the application characteristics of the current first water replenishment control strategy according to the change characteristics of all monitoring points and the indicator characteristics of all evaluation indicators, and constructing the preset standard application characteristics according to the preset standard change characteristics of all monitoring points corresponding to the current first water replenishment control strategy and the preset standard indicator characteristics of all evaluation indicators;

[0107] The application characteristic difference of the current first water replenishment control strategy is generated according to the application characteristic and the preset standard application characteristic.

[0108] In this embodiment, multiple evaluation indicators of the water cooling system include efficiency evaluation indicators, operation evaluation indicators, energy-saving evaluation indicators, etc. When the difference between the relevant operation data and the standard operation data is greater, the indicator evaluation value is smaller, and vice versa.

[0109] In this embodiment, the pressure change data refers to the pressure difference between the pressure data collected at each feedback time interval and the real-time pressure data before the application of the first water replenishment control strategy. The change trend refers to the changing direction of the pressure change data, including a positive change trend and a negative change trend. The change rate refers to the pressure change data / feedback time interval. The change stability refers to the degree of fluctuation of the pressure change data obtained at each feedback time interval.

[0110] In this embodiment, application characteristics are generated by determining the change characteristics of the monitoring points and the indicator characteristics of the evaluation indicators, and the application characteristic differences are calculated to lay the foundation for the subsequent determination of the correction ratio interval, and the first water replenishment control strategy is corrected or adjusted to achieve the water replenishment efficiency of the water replenishment system and the operating efficiency of the water cooling system.

[0111] In some embodiments of the present application, multiple second water replenishment control strategies are obtained according to application difference characteristics and a preset correction model, including:

[0112] The application difference characteristics include the change characteristic differences of all monitoring points and the indicator characteristic differences of all evaluation indicators;

[0113] A first-level difference degree reference interval and a second-level difference degree reference interval are preset, and each first-level difference degree reference interval and the second-level difference degree reference interval are mapped with a preset correction ratio interval;

[0114] Calculate the difference degree of the change characteristic differences of all monitoring points and obtain a first difference degree, compare the first difference degree with the first-level difference degree reference interval, screen out the first-level difference degree reference interval with the greatest similarity, and set the preset correction ratio of the screened first-level difference degree reference interval as the first correction ratio interval;

[0115] Calculate the difference degree of the indicator characteristic differences of all evaluation indicators and obtain the second difference degree, compare the second difference degree with the secondary difference degree reference interval, screen out the secondary difference degree reference interval with the greatest similarity, and set the preset correction ratio of the screened secondary difference degree reference interval as the second correction ratio interval;

[0116] Determine a comprehensive correction ratio interval according to the first correction ratio interval and the second correction ratio interval;

[0117] Based on the comprehensive correction ratio interval and the preset correction model, the water replenishment amount and water replenishment duration in the first water replenishment control strategy are corrected to generate multiple correction schemes;

[0118] The first water replenishment control strategy is modified according to multiple correction schemes to obtain multiple second water replenishment control strategies.

[0119] In this embodiment, the first-level difference degree reference interval is set according to the difference degree of the historical change characteristic differences of each monitoring point and the corresponding historical water replenishment control strategy, and the second-level difference degree reference interval is set according to the difference degree of the historical indicator characteristic differences of each evaluation indicator and the corresponding historical water replenishment control strategy.

[0120] In this embodiment, the corresponding first difference degree and second difference degree are obtained according to the change difference characteristics of all monitoring points and the indicator difference characteristics of all evaluation indicators, and a comprehensive correction ratio interval is selected. According to the comprehensive correction ratio interval and the preset correction model, multiple correction schemes of the first water replenishment control strategy are determined, and the first water replenishment control strategy is corrected or adjusted to improve the application effect of the first water replenishment control strategy, thereby improving the water replenishment efficiency of the water replenishment system and the operating efficiency of the water cooling system.

[0121] In some embodiments of the present application, the calculation formula of the first difference degree is:

[0122]

[0123] Among them, H1 is the first difference degree, c1 is the first difference degree conversion coefficient, n is the number of all monitoring points, △bi is the change characteristic difference of the i-th monitoring point, and a1 is the change characteristic difference adjustment constant;

[0124] The calculation formula of the second difference degree is:

[0125]

[0126] Among them, H2 is the second difference degree, c2 is the second difference degree conversion coefficient, m is the number of all evaluation indicators, △zi is the indicator characteristic difference of the i-th evaluation indicator, and a2 is the indicator characteristic difference adjustment constant.

[0127] In some embodiments of the present application, multiple second water replenishment control strategies are simulated to obtain simulation application difference characteristics of each second water replenishment control strategy, including:

[0128] Construct a static simulation scenario based on the location information and connection structure of the equipment involved in the water cooling system and water replenishment system;

[0129] Obtain the corresponding water replenishment amount and water replenishment duration to be set from each second water replenishment control strategy, and establish a dynamic relationship between the water replenishment amount, water replenishment duration, pressure change data, and operation data at the same dynamic node according to the operating relationship between the water replenishment amount and water replenishment duration and the pressure change data and operation data of each monitoring point and the operation data of the water cooling system;

[0130] The dynamic relationship and the static simulation scene are connected in position to construct a simulation model of multiple second water replenishment control strategies;

[0131] Determine a corresponding feedback time interval according to each second water replenishment control strategy, and obtain a simulation application feature in a corresponding simulation model according to the corresponding feedback time interval, wherein the simulation application feature includes a plurality of simulation change features and simulation index features;

[0132] The simulated application characteristics are subtracted from the standard application characteristics corresponding to the second water replenishment control strategy to obtain the simulated application characteristic differences, wherein the simulated application characteristic differences include a number of simulated change characteristic differences and simulation index characteristic differences.

[0133] In this embodiment, a simulation model of each second water replenishment control strategy is established through static simulation scenarios and dynamic relationships, so as to simulate the water replenishment of the water cooling system by each second water replenishment control strategy, obtain and analyze the simulation application characteristics of the second water replenishment control strategy, which is conducive to discovering the shortcomings of the second water replenishment control strategy, thereby improving the water replenishment efficiency of the water replenishment system and the operating efficiency of the water cooling system, and reducing the probability of failure of the wind turbine due to converter failure.

[0134] In some embodiments of the present application, the difference characteristics of multiple simulation applications are analyzed to screen out the optimal water replenishment control strategy, including:

[0135] Calculate the degree of difference of several simulation change characteristic differences and simulation index characteristic differences in the simulation application characteristic difference of each second water replenishment control strategy to obtain a simulation first difference degree and a simulation second difference degree;

[0136] Generate a simulation comprehensive difference degree according to the simulation first difference degree and the simulation second difference degree and corresponding weight coefficients;

[0137] The calculation formula of the simulation comprehensive difference degree is:

[0138] F0=f1×v1+f2×v2;

[0139] Among them, F0 is the simulation comprehensive difference degree, f1 is the simulation first difference degree, v1 is the first weight coefficient, f2 is the simulation second difference degree, v2 is the second weight coefficient;

[0140] The second water replenishment control strategy with the smallest simulation comprehensive difference is set as the optimal water replenishment control strategy.

[0141] In this embodiment, v1 is taken as 0.6 and v2 is taken as 0.4. The degree of difference between the simulation application characteristics of each second water replenishment control strategy and the corresponding standard application characteristics is determined by calculating the comprehensive simulation difference degree, and the minimum simulation comprehensive difference degree is determined as the optimal water replenishment control strategy. While maintaining the stable pressure of the pressure storage tank, the operating efficiency of the water cooling system is improved in multiple dimensions, and the energy consumption is reduced, so as to achieve safe and efficient operation of the water cooling system, thereby reducing the failure probability of the wind turbine.

[0142] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection of the present application.

Claims

1. A method for controlling water replenishment of a converter water cooling system, characterized in that: include: Set multiple monitoring points according to the pressure storage tank parameters, obtain the pressure data of each monitoring point according to the preset collection time node, and generate the operation evaluation value of the corresponding monitoring point; A first water replenishment control strategy and a feedback time interval of the water replenishment system are set according to the multiple operation evaluation values, the water cooling system is replenished according to the first water replenishment control strategy, and the pressure change data of each monitoring point and the operation data of the water cooling system are collected according to the feedback time interval; Generate application difference characteristics of a first water replenishment control strategy according to a plurality of pressure change data and operation data, and obtain a plurality of second water replenishment control strategies according to the application difference characteristics and a preset correction model; A plurality of second water replenishment control strategies are simulated to obtain simulation application difference characteristics of each second water replenishment control strategy, and a plurality of simulation application difference characteristics are analyzed to screen out an optimal water replenishment control strategy.

2. The method for controlling water replenishment of a converter water cooling system according to claim 1, characterized in that: Generate the operation evaluation value of the corresponding monitoring point, including: Acquire pressure data of each monitoring point according to a preset collection time node, compare the pressure data with corresponding standard pressure data, and generate a first evaluation value according to the comparison result; Subtract the pressure data of the current preset acquisition time node from the historical pressure data of the previous adjacent preset acquisition time node to obtain a pressure data fluctuation value, and set a compensation coefficient according to the pressure data fluctuation value; The first evaluation value of the corresponding monitoring point is corrected according to the compensation coefficient to obtain the operation evaluation value of the corresponding monitoring point.

3. The method for controlling water replenishment of a converter water cooling system according to claim 2, characterized in that: The first water replenishment control strategy of the water replenishment system is set according to the multiple operation evaluation values, including: Perform average processing on the operation evaluation values ​​of all monitoring points to obtain a comprehensive operation evaluation value; Setting a first water replenishment control strategy and a feedback time interval according to the comprehensive operation evaluation value, wherein the first water replenishment control strategy includes a water replenishment amount and a water replenishment duration; Presetting a first preset comprehensive operation evaluation value interval, a second preset comprehensive operation evaluation value interval, a third preset comprehensive operation evaluation value interval and a fourth preset comprehensive operation evaluation value interval; When the comprehensive operation evaluation value is within the first preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the fourth preset water replenishment amount, and the water replenishment duration is set to the fourth preset water replenishment duration; When the comprehensive operation evaluation value is within the second preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the third preset water replenishment amount, and the water replenishment duration is set to the third preset water replenishment duration; When the comprehensive operation evaluation value is within the third preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the second preset water replenishment amount, and the water replenishment duration is set to the second preset water replenishment duration; When the comprehensive operation evaluation value is in the fourth preset comprehensive evaluation value interval, the water replenishment amount of the first water replenishment control strategy is set to the first preset water replenishment amount, and the water replenishment duration is set to the first preset water replenishment duration.

4. The method for controlling water replenishment of a converter water cooling system according to claim 3, characterized in that: The feedback time interval is set according to the comprehensive operation evaluation value, including: Presetting a first preset feedback time interval, a second preset feedback time interval, a third preset feedback time interval and a fourth preset feedback time interval; When the comprehensive operation evaluation value is within the first preset comprehensive evaluation value interval, setting the feedback time interval to the first preset feedback time interval; When the comprehensive operation evaluation value is within the second preset comprehensive evaluation value interval, setting the feedback time interval to the second preset feedback time interval; When the comprehensive operation evaluation value is within the third preset comprehensive evaluation value interval, setting the feedback time interval to the third preset feedback time interval; When the comprehensive operation evaluation value is in the fourth preset comprehensive evaluation value interval, the feedback time interval is set to the fourth preset feedback time interval.

5. The method for controlling water replenishment of a converter water cooling system according to claim 4, characterized in that: The application difference characteristics of the first water replenishment control strategy are generated according to a plurality of pressure change data and operation data, including: Replenish water to the water cooling system according to the first water replenishment control strategy set by the comprehensive operation evaluation value, and obtain multiple pressure change data of each monitoring point and operation data of the water cooling system according to the corresponding feedback time interval; Generate the change trend, change rate and change stability of the pressure data of the corresponding monitoring point according to the multiple pressure change data of each monitoring point, and generate the change characteristics of each monitoring point according to the change trend, change rate and change stability; Pre-set multiple evaluation indicators of the water cooling system; According to the correlation between the operation data of the water cooling system and the evaluation index, the relevant operation data of each evaluation index is determined, and the relevant operation data is compared with the standard operation data of the corresponding evaluation index, and the index evaluation value of the corresponding evaluation index is generated according to the comparison result; Generate an indicator feature of each evaluation indicator according to the indicator evaluation value of each evaluation indicator; Constructing the application characteristics of the current first water replenishment control strategy according to the change characteristics of all monitoring points and the indicator characteristics of all evaluation indicators, and constructing the preset standard application characteristics according to the preset standard change characteristics of all monitoring points corresponding to the current first water replenishment control strategy and the preset standard indicator characteristics of all evaluation indicators; The application characteristic difference of the current first water replenishment control strategy is generated according to the application characteristic and the preset standard application characteristic.

6. The method for controlling water replenishment of a converter water cooling system according to claim 5, characterized in that: According to the application difference characteristics and the preset correction model, multiple second water replenishment control strategies are obtained, including: The application difference characteristics include the change characteristic differences of all monitoring points and the indicator characteristic differences of all evaluation indicators; A first-level difference degree reference interval and a second-level difference degree reference interval are preset, and each first-level difference degree reference interval and the second-level difference degree reference interval are mapped with a preset correction ratio interval; Calculate the difference degree of the change characteristic differences of all monitoring points and obtain a first difference degree, compare the first difference degree with the first-level difference degree reference interval, screen out the first-level difference degree reference interval with the greatest similarity, and set the preset correction ratio of the screened first-level difference degree reference interval as the first correction ratio interval; Calculate the difference degree of the indicator characteristic differences of all evaluation indicators and obtain the second difference degree, compare the second difference degree with the secondary difference degree reference interval, screen out the secondary difference degree reference interval with the greatest similarity, and set the preset correction ratio of the screened secondary difference degree reference interval as the second correction ratio interval; Determine a comprehensive correction ratio interval according to the first correction ratio interval and the second correction ratio interval; Based on the comprehensive correction ratio interval and the preset correction model, the water replenishment amount and water replenishment duration in the first water replenishment control strategy are corrected to generate multiple correction schemes; The first water replenishment control strategy is modified according to multiple correction schemes to obtain multiple second water replenishment control strategies.

7. The method for controlling water replenishment of a converter water cooling system according to claim 6, characterized in that: The calculation formula of the first difference degree is: Among them, H1 is the first difference degree, c1 is the first difference degree conversion coefficient, n is the number of all monitoring points, △bi is the change characteristic difference of the i-th monitoring point, and a1 is the change characteristic difference adjustment constant; The calculation formula of the second difference degree is: Among them, H2 is the second difference degree, c2 is the second difference degree conversion coefficient, m is the number of all evaluation indicators, △zi is the indicator characteristic difference of the i-th evaluation indicator, and a2 is the indicator characteristic difference adjustment constant.

8. The method for controlling water replenishment of a converter water cooling system according to claim 7, characterized in that: Simulate multiple second water replenishment control strategies to obtain simulation application difference characteristics of each second water replenishment control strategy, including: Construct a static simulation scenario based on the location information and connection structure of the equipment involved in the water cooling system and water replenishment system; Obtain the corresponding water replenishment amount and water replenishment duration to be set from each second water replenishment control strategy, and establish a dynamic relationship between the water replenishment amount, water replenishment duration, pressure change data, and operation data at the same dynamic node according to the operating relationship between the water replenishment amount and water replenishment duration and the pressure change data and operation data of each monitoring point and the operation data of the water cooling system; The dynamic relationship and the static simulation scene are connected in position to construct a simulation model of multiple second water replenishment control strategies; Determine a corresponding feedback time interval according to each second water replenishment control strategy, and obtain a simulation application feature in a corresponding simulation model according to the corresponding feedback time interval, wherein the simulation application feature includes a plurality of simulation change features and simulation index features; The simulated application characteristics are subtracted from the standard application characteristics corresponding to the second water replenishment control strategy to obtain the simulated application characteristic differences, wherein the simulated application characteristic differences include a number of simulated change characteristic differences and simulation index characteristic differences.

9. The method for controlling water replenishment of a converter water cooling system according to claim 8, characterized in that: Analyze the difference characteristics of multiple simulation applications and select the optimal water replenishment control strategy, including: Calculate the degree of difference of several simulation change characteristic differences and simulation index characteristic differences in the simulation application characteristic difference of each second water replenishment control strategy to obtain a simulation first difference degree and a simulation second difference degree; Generate a simulation comprehensive difference degree according to the simulation first difference degree and the simulation second difference degree and corresponding weight coefficients; The calculation formula of the simulation comprehensive difference degree is: F0=f1×v1+f2×v2; Among them, F0 is the simulation comprehensive difference degree, f1 is the simulation first difference degree, v1 is the first weight coefficient, f2 is the simulation second difference degree, v2 is the second weight coefficient; The second water replenishment control strategy with the smallest simulation comprehensive difference is set as the optimal water replenishment control strategy.

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