CN113849023B - Logic method for regulating and controlling environment in offshore wind power converter cabinet - Google Patents

Abstract

The invention discloses a logic method for environmental regulation and control in an offshore wind power converter cabinet, comprising: collecting environmental information in the offshore wind power converter cabinet and preprocessing the environmental information; analyzing and preprocessing according to historical operation data information extracting the characteristic factors affecting the environment in the offshore wind turbine converter cabinet; constructing a control logic model, using the characteristic factors to train the control logic model, and obtaining a trained control logic model; using the training A good control logic model adjusts the environment in the offshore wind power converter cabinet in real time, so that a stable micro-environment is maintained in the converter cabinet. By intelligently controlling the environment in the cabinet, the method of the invention keeps a temperature and humidity balance in the environment in the cabinet, avoids the occurrence of failure, saves the cost and improves the reliability.

Description

A logic method for environmental regulation and control in offshore wind power converter cabinets

technical field

The invention relates to the technical fields of converters and environmental regulation, and in particular to an environmental regulation control logic method in an offshore wind power converter cabinet.

Background technique

In the converter cabinet, there are temperature fields, stress fields, flow fields, humidity fields, etc., which are related to each other and affect each other. In order to effectively prevent corrosion, a stable micro-environment needs to be maintained in the converter cabinet in order to effectively protect the converter; the thermodynamic field and coupling technology of the product are studied, and the product micro-environment is adjusted by active and passive methods. Internal desiccant, heater, dehumidifier, temperature and humidity sensor, PT100, temperature protection button switch, motor switch, water heating pipeline and other devices form an organic whole through logical control methods to jointly create a converter micro-environment.

SUMMARY OF THE INVENTION

The purpose of this section is to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the application to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions may not be used to limit the scope of the invention.

The present invention has been proposed in view of the above-mentioned existing problems.

Therefore, the technical problem solved by the present invention is that the existing technology cannot effectively control the environment in the cabinet, so that it can achieve the effect of an organic whole.

In order to solve the above technical problems, the present invention provides the following technical solutions: collecting environmental information in the offshore wind power converter cabinet and preprocessing the environmental information; Characteristic factors of the environment in the wind power converter cabinet; constructing a control logic model, using the characteristic factors to train the control logic model, and obtaining a trained control logic model; using the trained control logic model to adjust the control logic model in real time. The environment in the offshore wind power converter cabinet is described, so that a stable micro-environment is maintained in the converter cabinet.

As a preferred solution of the environmental regulation control logic method in the offshore wind power converter cabinet of the present invention, the environmental information in the offshore wind power converter cabinet includes temperature, stress, space occupied by fluid motion, humidity.

As a preferred solution of the environmental regulation control logic method in the offshore wind power converter cabinet according to the present invention, the preprocessing of the environmental information includes:

Clean up blank values, format content, logic errors, and non-required information;

Perform feature construction, information classification and information quantification on the environmental information;

Perform information statistics on the transformed information, and merge the information into a unified information storage;

The cluster-based outlier detection strategy is used to detect and eliminate the abnormal samples in the information samples.

As a preferred solution of the environmental regulation control logic method in the offshore wind power converter cabinet of the present invention, wherein: the historical operation data information includes the working voltage, load and current of the converter during operation under different environmental information conditions and environmental information data.

As a preferred solution of the method for controlling the environment in the offshore wind power converter cabinet according to the present invention, wherein: the offshore wind power converter is represented by T(t ₁ , t ₂ , . . . , t _m ) Operation-related data, S(s ₁ , s ₂ ,...,s _n ) represents the working state of the heating and cooling system of the offshore wind power converter, Z(z ₁ , z ₂ ,..., z _k ) represents the Considering the environmental characteristic factors in the offshore wind power converter cabinet, the operation-related data T is expressed as a function of S, Z and time t in the following formula:

T=f(S, Z, t).

As a preferred solution of the control logic method for environmental regulation in the offshore wind power converter cabinet of the present invention, wherein: the offshore wind power converter heating and cooling system includes a desiccant, a heater, a dehumidifier, and a temperature and humidity sensor, PT100, temperature protection button switch, motor switch, water heating pipeline.

As a preferred solution of the control logic method for environment regulation in the offshore wind power converter cabinet according to the present invention, wherein: constructing a control logic model according to the functional relationship includes:

The degree of fit of the control logic model is calculated using the following formula:

Relevant Index:

Root Mean Square Error:

表示拟合数据的拟合值，

表示拟合数据的平均值，n表示常数系数，t表示时间。where T _t represents the actual value of the fitted data,

represents the fitted value of the fitted data,

represents the mean of the fitted data, n represents the constant coefficient, and t represents the time.

As a preferred solution of the control logic method for adjusting the environment in the offshore wind power converter cabinet according to the present invention, the environment in the cabinet is adjusted by using the heating and cooling system according to the correlation index and the root mean square error include,

When not started: when the correlation index is less than 0.89 and the root mean square error is greater than 0.13, the heater and dehumidifier are used to heat and dehumidify the cabinet until the temperature and humidity in the cabinet reach the preset threshold, and the controller is powered on;

After startup: when the correlation index is greater than 0.89 and less than 0.94, and the root mean square error is less than 0.13 and greater than 0.09, use heaters and dehumidifiers to heat and dehumidify the cabinet until the temperature and humidity in the cabinet reach the preset threshold;

After startup: when the correlation index is equal to 0.89 and the root mean square error is equal to 0.13, forced heating is performed for time t, and the time t is 6h.

Beneficial effects of the present invention: The method of the present invention maintains a temperature and humidity balance in the cabinet environment through intelligent control of the cabinet environment, avoids the occurrence of faults, effectively protects the converter, saves costs, and improves reliability. sex.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort. in:

FIG. 1 is a schematic flow chart of a basic flow chart of an environment regulation control logic method in an offshore wind power converter cabinet according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of program code running of a clustering outlier sample detection strategy of an environmental regulation control logic method in an offshore wind power converter cabinet according to an embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can do so without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments disclosed below.

Second, reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure, or characteristic that may be included in at least one implementation of the present invention. The appearances of "in one embodiment" in various places in this specification are not all referring to the same embodiment, nor are they separate or selectively mutually exclusive from other embodiments.

The present invention is described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the sectional views showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the present invention. scope of protection. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual production.

At the same time, in the description of the present invention, it should be noted that the orientation or positional relationship indicated in terms such as "upper, lower, inner and outer" is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention. The invention and simplified description do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first, second or third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

Unless otherwise expressly specified and limited in the present invention, the term "installation, connection, connection" should be understood in a broad sense, for example: it may be a fixed connection, a detachable connection or an integral connection; it may also be a mechanical connection, an electrical connection or a direct connection. The connection can also be indirectly connected through an intermediate medium, or it can be the internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1

Referring to FIGS. 1 to 2 , which is an embodiment of the present invention, a logic method for environmental regulation and control in an offshore wind power converter cabinet is provided, including:

S1: Collect environmental information in the offshore wind power converter cabinet and preprocess the environmental information;

It should be noted that the environmental information in the offshore wind power converter cabinet includes temperature, stress, space occupied by fluid movement, and humidity.

Further, preprocessing the environmental information includes:

Clean up blank values, format content, logic errors, and non-required information;

Carry out feature construction, information classification and information quantification for environmental information;

Perform information statistics on the transformed information, and merge the information into a unified information storage;

The cluster-based outlier detection strategy is used to detect and eliminate the abnormal samples in the information samples.

Among them, the program code of the clustered outlier detection strategy is:

The visualization of its running code is shown in Figure 2.

S2: Analyze the preprocessed environmental information according to the historical operation data information, and extract the characteristic factors that affect the environment in the offshore wind power converter cabinet;

It should be noted that the historical operation data information includes the working voltage, load, current and environmental information data of the converter during operation under different environmental information conditions.

S3: Build a control logic model, use characteristic factors to train the control logic model, and obtain a trained control logic model;

It should be noted that the process of constructing the control logic model includes:

T(t ₁ , t ₂ ,..., t _m ) is used to represent the operation-related data of the offshore wind power converter, and S(s ₁ , S ₂ ,..., _sn ) is used to represent the heat dissipation system of the offshore wind power converter Working state, Z(z ₁ , z ₂ , ..., z _k ) represents the environmental characteristic factors in the offshore wind power converter cabinet, then the operation-related data T is represented as a function of S, Z and time t in the following formula:

T=f(S, Z, t).

Among them, the heating and cooling system of the offshore wind power converter includes desiccant, heater, dehumidifier, temperature and humidity sensor, PT100, temperature protection button switch, motor switch, and water heating pipeline.

Further, constructing a control logic model according to the functional relationship includes:

The fit of the control logistic model is calculated using the following formula:

Relevant Index:

Root Mean Square Error:

表示拟合数据的拟合值，

表示拟合数据的平均值，n表示常数系数，t表示时间。where T _t represents the actual value of the fitted data,

represents the fitted value of the fitted data,

represents the mean of the fitted data, n represents the constant coefficient, and t represents the time.

S4: Use the trained control logic model to adjust the environment in the offshore wind power converter cabinet in real time, so that a stable micro-environment is maintained in the converter cabinet.

It should be noted that the use of the heating and cooling system to adjust the environment in the cabinet according to the relevant index and root mean square error includes:

When it is not started: when the relevant index is less than 0.89 and the root mean square error is greater than 0.13, the heater and dehumidifier are used to heat and dehumidify the cabinet until the temperature and humidity in the cabinet reach the preset threshold, and the controller is powered on;

After startup: when the relevant index is greater than 0.89 and less than 0.94, and the root mean square error is less than 0.13 and greater than 0.09, use heaters and dehumidifiers to heat and dehumidify the cabinet until the temperature and humidity in the cabinet reach the preset threshold;

After startup: when the correlation index is equal to 0.89 and the root mean square error is equal to 0.13, the forced heating for time t is performed, and the time t is 6h;

For example, the preset maximum humidity is 85%, the minimum is 81%, and the preset temperature threshold is 5°C. When not activated: when the relative index is less than 0.89 and the root mean square error is greater than 0.13, the humidity in the cabinet is higher than 85% or when the temperature is lower than 5°C, the heater and dehumidifier in the cabinet start to perform heating and dehumidification, and at the same time send a liquid cooling heating request signal to the converter controller and the main control, when the value reaches the preset threshold, that is, when the cabinet When the internal humidity is lower than 81% and the temperature is higher than 5℃, the UPS in the cabinet is started and the controller is powered;

After the controller is powered on and started, that is, when the relevant index is equal to 0.89 and the root mean square error is equal to 0.13, the forced heating is performed for the T time (default 6h), and the module power supply is started after the time is up (before the first power-on debugging of the converter) , it must be ensured that the water cooling system has been connected and can operate normally);

After startup: when the correlation index is greater than 0.89 and less than 0.94, and the root mean square error is less than 0.13 and greater than 0.09, use heaters and dehumidifiers to heat and dehumidify the cabinet until the temperature and humidity in the cabinet reach the preset threshold; that is, the humidity in the cabinet is higher than 85% or when the temperature is lower than 5°C, the heater and dehumidifier in the control cabinet will heat and dehumidify, and at the same time send a liquid cooling heating request signal to the main control;

During standby, when the temperature and humidity sensor detects that the inlet water temperature is lower than 40°C, the heater and dehumidifier in the control cabinet are started to perform heating and dehumidification, and at the same time, a liquid cooling heating request signal is sent to the main controller. When the inlet water temperature is higher than 45°C, the Stop the heating and dehumidifier in the cabinet, and stop the heating request signal;

During standby, when the temperature and humidity sensor detects that the temperature of the switch cabinet is lower than 37°C, the heater and dehumidifier in the control cabinet start to heat and dehumidify, and at the same time send a liquid cooling heating request signal to the main control. When the temperature of the switch cabinet is higher than 40°C When the heating and dehumidifier work in the cabinet is stopped, the heating request signal is stopped.

Example 2

This embodiment is another embodiment of the present invention. This embodiment is different from the first embodiment in that it provides a verification test of an environmental regulation control logic method in an offshore wind power converter cabinet, which is a test of the method used in this method. The technical effect is verified and explained, this embodiment adopts the traditional technical solution and the method of the present invention to carry out a comparative test, and compares the test results by means of scientific demonstration to verify the real effect of the method.

The traditional technical solution: the micro-environment in the converter cabinet cannot be kept stable, resulting in the inability to effectively carry out anticorrosion, which in turn makes the converter cabinet fail frequently, increases the operating cost, and reduces the operating reliability. The traditional method has high operational reliability, environmental balance and low cost. In this embodiment, the traditional control and adjustment method and this method will be used to measure and compare the internal environment and anti-corrosion effect of the offshore wind power converter cabinet in real time. .

Test environment: simulate the operation of the converter cabinet on the simulation platform and simulate different environments, respectively use the traditional method and this method to open the automatic test equipment and use MATLB software programming to realize the simulation test of the two methods, and obtain the simulation data according to the experimental results. 30 sets of data were tested for each method, and the results are shown in the following table.

Table 1: Comparison table of experimental results.

sample traditional method method of the invention Test duration/day 30 30 Corrosion degree/% 7.56 1.23 Maintenance cost/10,000 yuan 2.03 1.1 Failure rate/% 14 3.2

As can be seen from the above table, the method of the present invention has better performance than the traditional method.

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 preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

Claims (5)

1. a kind of environment regulation control logic method in offshore wind power converter cabinet, is characterized in that, comprises: collecting environmental information in the offshore wind power converter cabinet and preprocessing the environmental information; Preprocessing the environmental information includes, Clean up blank values, format content, logic errors, and non-required information; Perform feature construction, information classification and information quantification on the environmental information; Perform information statistics on the transformed information, and merge the information into a unified information storage; The cluster-based outlier detection strategy is used to detect and eliminate the samples that may still be abnormal in the information samples; Analyze the preprocessed environmental information according to the historical operation data information, and extract the characteristic factors that affect the environment in the offshore wind power converter cabinet; constructing a control logic model, and using the characteristic factors to train the control logic model to obtain a trained control logic model; Use T(t ₁ , t ₂ ,..., t _m ) to represent the data related to the operation of the offshore wind power converter, and S(s ₁ , s ₂ ,..., _sn ) to represent the heat dissipation system of the offshore wind power converter Working state, Z(z ₁ , z ₂ , ..., z _k ) represents the environmental characteristic factors in the offshore wind power converter cabinet, then the operation-related data T is represented as a function of S, Z and time t in the following formula: T=f(S, Z, t) Building a control logic model based on functional relationships includes, The degree of fit of the control logic model is calculated using the following formula: Relevant Index:

Root Mean Square Error:

where T _t represents the actual value of the fitted data,

represents the fitted value of the fitted data,

represents the mean value of the fitted data, n represents the constant coefficient, and t represents the time; The environment in the offshore wind power converter cabinet is adjusted in real time by using the trained control logic model, so that a stable micro-environment is maintained in the converter cabinet. 2. The method for controlling the environment in an offshore wind power converter cabinet according to claim 1, wherein the environmental information in the offshore wind power converter cabinet includes temperature, stress, space occupied by fluid movement, humidity. 3. The method for controlling the environment in an offshore wind power converter cabinet according to claim 1, wherein the historical operation data information includes the working voltage, load, and current of the converter during operation under different environmental information conditions. and environmental information data. 4. The method for controlling the environment in an offshore wind power converter cabinet according to claim 3, wherein the offshore wind power converter heating and cooling system comprises a desiccant, a heater, a dehumidifier, and a temperature and humidity sensor, PT100, temperature protection button switch, motor switch, water heating pipeline. 5 . The control logic method for adjusting the environment in the cabinet of an offshore wind power converter according to claim 4 , wherein the environment in the cabinet is adjusted by using the heating and cooling system according to the correlation index and the root mean square error. 6 . include, When not started: when the correlation index is less than 0.89 and the root mean square error is greater than 0.13, the heater and dehumidifier are used to heat and dehumidify the cabinet until the temperature and humidity in the cabinet reach the preset threshold, and the controller is powered on; After startup: when the correlation index is greater than 0.89 and less than 0.94, and the root mean square error is less than 0.13 and greater than 0.09, use heaters and dehumidifiers to heat and dehumidify the cabinet until the temperature and humidity in the cabinet reach the preset threshold; After startup: when the correlation index is equal to 0.89 and the root mean square error is equal to 0.13, forced heating is performed for time t, and the time t is 6h.

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