阅读说明：本技术 一种水轮发电机温度场可视化监控系统及其构建方法 (Hydraulic generator temperature field visual monitoring system and construction method thereof ) 是由 李飞霏 曾云 钱晶 陈家焕 吴梦圆 郭志成 何超 王伟 于磊 于 2021-01-20 设计创作，主要内容包括：本发明涉及一种水轮发电机温度场可视化监控系统及其构建方法,属于测量技术领域。该水轮发电机温度场可视化监控系统,包括温度传感器、数据采集存储器和电厂计算机监控系统；温度传感器安装在水轮发电机定子、转子、轴承及其空冷机上,温度传感器上的数据通过数据采集存储器连接电厂计算机监控系统；电厂计算机监控系统由离散数据清洗模块、故障点分析模块、离散数据可视化处理模块和可视化终端界面组成。本系统利用实测数据重构水轮发电机实时温度场,可实现对机组任意视觉的温度监控,在实现发电机状态监测的同时,可进一步用于故障诊断和预警系统。(The invention relates to a hydraulic generator temperature field visual monitoring system and a construction method thereof, belonging to the technical field of measurement. The visual monitoring system for the temperature field of the hydraulic generator comprises a temperature sensor, a data acquisition memory and a power plant computer monitoring system; the temperature sensors are arranged on the stator, the rotor, the bearing and the air cooler of the hydraulic generator, and data on the temperature sensors are connected with a power plant computer monitoring system through a data acquisition memory; the power plant computer monitoring system consists of a discrete data cleaning module, a fault point analysis module, a discrete data visual processing module and a visual terminal interface. The system utilizes the measured data to reconstruct the real-time temperature field of the hydraulic generator, can realize temperature monitoring of any vision of the unit, and can be further used for fault diagnosis and early warning systems while realizing the monitoring of the state of the generator.)

1. The utility model provides a visual monitored control system of hydraulic generator temperature field which characterized in that: the system comprises a temperature sensor, a data acquisition memory and a power plant computer monitoring system;

the temperature sensors are arranged on the hydraulic generator stator, the rotor, the bearing and the air cooler thereof, and data on the temperature sensors are connected with the power plant computer monitoring system through the data acquisition memory;

the power plant computer monitoring system consists of a discrete data cleaning module, a fault point analysis module, a discrete data visualization processing module and a visualization terminal interface;

the discrete data cleaning module is used for removing dirty data caused by exceeding the limit or fault of the instrument and filling missing data by using an algorithm;

the fault point analysis module is used for storing various fault data generated in the running of the unit, and can be used as a basis for future maintenance to analyze the fault reason of the unit, so that the running efficiency of the generator is further improved;

the discrete data visualization processing module reasonably deduces the temperature data of an unknown area according to the known temperature data cleaned by the discrete data cleaning module;

the visual terminal interface is used for monitoring the temperature field of any vision on the hydraulic generator.

2. A method for constructing a visual monitoring system for a temperature field of a hydraulic generator according to claim 1, which is characterized by comprising the following steps:

step 1, performing three-dimensional modeling according to actual generator data, and acquiring the heat source distribution characteristics of a hydraulic generator temperature field through temperature simulation software, actual engineering operation conditions and literature summary;

step 2, according to the heat source distribution characteristics of the temperature field of the hydraulic generator obtained in the step 1, reasonably arranging temperature sensors, wherein each temperature sensor serves as a temperature acquisition terminal node, and the node number corresponds to the three-dimensional coordinate in the three-dimensional model;

step 3, transmitting the temperature data on each temperature sensor in the step 2 to a data acquisition memory, and transmitting the temperature data to a power plant computer monitoring system;

and 4, cleaning, fault point analysis and visualization processing are carried out on the temperature data in the step 3 by the power plant computer monitoring system, and finally, the real-time change omnibearing stereoscopic generator temperature field can be seen.

3. The construction method of the hydraulic generator temperature field visual monitoring system according to claim 2, characterized in that: and in the step 4, the power plant computer monitoring system carries out cleaning, fault point analysis and visual processing on the temperature data in the step 3, and the specific process is as follows:

(4-1) determination of missing value: identifying a node with three-dimensional coordinates but no temperature data from the temperature data through a discrete data cleaning module, and storing the node into a fault point analysis module;

(4-2) filling of missing values: the discrete data cleaning module fits a missing value by using an algorithm through the temperature of surrounding measuring points;

(4-3) detection of abnormal value: each type of temperature sensor has a measuring range, temperature data beyond the measuring range are abnormal data, the abnormal data need to be identified before interpolation, the abnormal data at the point are deleted, and the abnormal data are stored in a fault point analysis module; for the temperature which exceeds the limit temperature of the unit operation and is within the limit range of the sensor, the temperature needs to be identified and stored in a fault point analysis module;

(4-4) processing of abnormal value: marking the node position, and fitting the temperature data of the node through the temperature of surrounding measuring points;

and (4-5) inputting the temperature data processed in the steps (4-1) to (4-4) into a discrete data visual processing module, carrying out interpolation calculation in the three-dimensional model by using a space combination interpolation algorithm to obtain temperature values of all coordinate positions in the model, setting corresponding color tables, enabling different temperatures to correspond to different colors, and seeing the real-time change omnibearing stereoscopic generator temperature field through a visual terminal interface.

4. The construction method of the hydraulic generator temperature field visual monitoring system according to claim 3, characterized in that: the temperature field of the visual terminal interface can be subjected to translation, zooming and rotary display for multi-angle viewing.

Technical Field

The invention relates to a hydraulic generator temperature field visual monitoring system and a construction method thereof, belonging to the technical field of measurement.

Background

The hydro-generator is the core equipment of a hydropower station, bears about 18% of the generated energy of China, and the temperature of the hydro-generator is an important index for measuring the running condition of a unit. The temperature monitoring system of the existing hydraulic generator only provides a simple digital display interface and an alarm function, the temperature monitoring of the whole temperature field in the generator can not be realized in any visual way, the field operation personnel can hardly judge the running condition of the generator visually, and the fault data generated in the running process is rarely stored and analyzed afterwards.

The hydro-generator is a kind of rotating equipment in which a main shaft rotates with a rotor, and therefore, a temperature sensor lead of the rotor is difficult to be drawn out. The utility model discloses a utility model patent that bulletin number is CN207528368U, entitled "wireless temperature measurement system of hydraulic generator rotor" discloses a wireless temperature measurement system of hydraulic generator rotor intelligence, and its aim at carries out effectual all-weather real-time supervision, regulation and control to the temperature variation of rotor, ensures the operation safety of unit. The invention patent of application number CN 110081993B entitled "a space temperature visual monitoring system and a construction method thereof" discloses a space temperature visual monitoring system, which realizes the functions of realizing the visualization of discrete data and three-dimensional dynamic monitoring of the temperature change of a detected environment while realizing high-precision real-time remote monitoring. However, at present, a complete and effective hydraulic generator temperature field visual monitoring system does not exist.

Disclosure of Invention

Aiming at the problems and the defects in the prior art, the invention provides a hydraulic generator temperature field visual monitoring system and a construction method thereof. The invention is realized by the following technical scheme.

A visual monitoring system for a temperature field of a hydraulic generator comprises a temperature sensor, a data acquisition memory and a power plant computer monitoring system;

the temperature sensors are arranged on the hydraulic generator stator, the rotor, the bearing and the air cooler thereof, and data on the temperature sensors are connected with the power plant computer monitoring system through the data acquisition memory;

the power plant computer monitoring system consists of a discrete data cleaning module, a fault point analysis module, a discrete data visualization processing module and a visualization terminal interface;

the discrete data cleaning module is used for removing dirty data caused by exceeding the limit or fault of the instrument and filling missing data by using an algorithm;

the fault point analysis module is used for storing various fault data generated in the running of the unit, and can be used as a basis for future maintenance to analyze the fault reason of the unit, so that the running efficiency of the generator is further improved;

the discrete data visualization processing module reasonably deduces the temperature data of the unknown area according to the known temperature data cleaned by the discrete data cleaning module;

the visual terminal interface is used for monitoring the temperature of the temperature field reasonably calculated on the hydraulic generator in any visual sense.

A construction method of a hydraulic generator temperature field visual monitoring system comprises the following steps:

step 1, performing three-dimensional modeling according to actual generator data, and acquiring the heat source distribution characteristics of a hydraulic generator temperature field through temperature simulation software, actual engineering operation conditions and literature summary;

step 2, according to the heat source distribution characteristics of the temperature field of the hydraulic generator obtained in the step 1, reasonably arranging temperature sensors, wherein each temperature sensor serves as a temperature acquisition terminal node, and the node number corresponds to the three-dimensional coordinate in the three-dimensional model;

step 3, transmitting the temperature data on each temperature sensor in the step 2 to a data acquisition memory, and transmitting the temperature data to a power plant computer monitoring system;

and 4, cleaning, fault point analysis and visualization processing are carried out on the temperature data in the step 3 by the power plant computer monitoring system, and finally, the real-time change omnibearing stereoscopic generator temperature field can be seen.

And in the step 4, the power plant computer monitoring system carries out cleaning, fault point analysis and visual processing on the temperature data in the step 3, and the specific process is as follows:

(4-1) determination of missing value: identifying a node with three-dimensional coordinates but no temperature data from the temperature data through a discrete data cleaning module, and storing the node into a fault point analysis module;

(4-2) filling of missing values: the discrete data cleaning module fits a missing value by using different algorithms through the temperature of surrounding measuring points;

(4-3) detection of abnormal value: each type of temperature sensor has a measuring range, temperature data beyond the measuring range are abnormal data, the abnormal data need to be identified before interpolation, the abnormal data at the point are deleted, and the abnormal data are stored in a fault point analysis module; the discrete data cleaning module also identifies and stores the temperature which exceeds the limit temperature of the unit operation and is within the limit range of the sensor in the fault point analysis module;

(4-4) processing of abnormal value: marking the node position, and fitting the temperature data of the node through the temperature of surrounding measuring points;

and (4-5) inputting the temperature data processed in the steps (4-1) to (4-4) into a discrete data visual processing module, carrying out interpolation calculation in the three-dimensional model by using a space combination interpolation algorithm to obtain temperature values of all coordinate positions in the model, setting corresponding color tables, enabling different temperatures to correspond to different colors, and seeing the real-time change omnibearing stereoscopic generator temperature field through a visual terminal interface.

The temperature field of the visual terminal interface can be subjected to translation, zooming and rotary display for multi-angle viewing.

The invention has the beneficial effects that:

(1) the visualization degree is high, and through the interface, the field operation personnel can monitor the temperature distribution of the hydraulic generator stator and rotor, the bearing and the air cooler thereof in an all-around and multi-angle manner, and visually judge the running condition in the generator.

(2) The visual aging is high. The interpolation algorithm adopted has high calculation efficiency and can meet the requirement of dynamically displaying the three-dimensional temperature distribution diagram in real time in the hydropower station.

(3) The interface data has high reliability. The adopted data cleaning program can effectively reduce the negative influence of dirty data on the visual interface.

(4) And storing the fault data. The system stores various fault data generated in the running of the unit in the fault point analysis module, can be used as a basis for maintenance, analyzes fault reasons and further improves the running efficiency of the generator.

Drawings

FIG. 1 is a block diagram of a visual monitoring system for a temperature field of a hydraulic generator according to the present invention;

FIG. 2 is a flow chart of a method for constructing the visual monitoring system of the temperature field of the hydraulic generator according to the invention;

FIG. 3 is a visual terminal interface diagram of the present invention;

FIG. 4 is a graph of the temperature field simulation results of the present invention;

FIG. 5 is a color cloud map of the present invention interpolated;

fig. 6 is a point of failure display diagram of the present invention.

In the figure: 1-temperature sensor, 2-data acquisition and storage device and 3-power plant computer monitoring system.

Detailed Description

The invention is further described with reference to the following drawings and detailed description.

Example 1

As shown in fig. 1, the visual monitoring system for the temperature field of the hydraulic generator comprises a temperature sensor, a data acquisition and storage device and a computer monitoring system of a power plant;

the temperature sensor is arranged on the stator and the rotor of the hydraulic generator, the bearing and the air cooler thereof, and data on the temperature sensor is connected with the power plant computer monitoring system through the data acquisition memory;

the power plant computer monitoring system consists of a discrete data cleaning module, a fault point analysis module, a discrete data visualization processing module and a visualization terminal interface;

the discrete data cleaning module is used for removing dirty data caused by exceeding the limit or fault of the instrument and filling missing data by using an algorithm;

the fault point analysis module is used for storing various fault data generated in the running of the unit, and can be used as a basis for future maintenance to analyze the fault reason of the unit, so that the running efficiency of the generator is further improved;

the discrete data visualization processing module reasonably deduces the temperature data of the unknown area according to the known temperature data cleaned by the discrete data cleaning module;

the visual terminal interface is used for monitoring the temperature of the temperature field reasonably calculated on the hydraulic generator in any visual sense.

As shown in fig. 2, the construction method of the hydraulic generator temperature field visualization monitoring system includes the following steps:

step 1, performing three-dimensional modeling by using three-dimensional modeling software soildworks according to actual generator data (the model is SF55-10/740 mixed-flow hydraulic generator actual data is shown in the following table 1), and acquiring the heat source distribution characteristics of a hydraulic generator temperature field through temperature simulation software (the temperature field simulation result is shown in figure 4), engineering actual operation conditions and literature summary;

TABLE 1 basic parameters of the Generator

Parameter(s)	Numerical value	Parameter(s)	Numerical value
				Rated workRate/kw	55	Stator core outer diameter/mm	740
Rated voltage/V	400	Axial length/mm of iron core	220
				Air gap/mm	10	Rated speed/(r/min)	600
Number of stator slots	84	Stator core inner diameter/mm	590
				Number of turns of stator	7

Step 2, according to the heat source distribution characteristics of the temperature field of the hydraulic generator obtained in the step 1, reasonably arranging temperature sensors, wherein each temperature sensor serves as a temperature acquisition terminal node, and the node number corresponds to the three-dimensional coordinate in the three-dimensional model;

step 3, converting the temperature data on each temperature sensor in the step 2 into digital quantity through an A/D converter, transmitting the digital quantity to a data acquisition memory, and transmitting the digital quantity to a power plant computer monitoring system;

step 4, the power plant computer monitoring system carries out cleaning, fault point analysis and visual processing on the temperature data in the step 3, and finally an omnibearing stereoscopic generator temperature field which changes in real time can be seen;

and in the step 4, the power plant computer monitoring system carries out cleaning, fault point analysis and visual processing on the temperature data in the step 3, and the specific process is as follows:

(4-1) determination of missing value: identifying a node with three-dimensional coordinates but no temperature data from the temperature data through a discrete data cleaning module, and storing the node into a fault point analysis module;

(4-2) filling of missing values: the discrete data cleaning module fits a missing value by using an algorithm through the temperature of surrounding measuring points; here, K-means filling is used;

(4-3) detection of abnormal value: each type of temperature sensor has a measuring range, temperature data beyond the measuring range are abnormal data, the abnormal data need to be identified before interpolation, the abnormal data at the point are deleted, and the abnormal data are stored in a fault point analysis module; the temperature which exceeds the limit temperature of the unit operation and is within the limit range of the sensor is also identified and stored in a fault point analysis module;

(4-4) processing of abnormal value: marking the node position, and fitting the temperature data of the node through the temperature of surrounding measuring points;

(4-5) inputting the temperature data processed in the steps (4-1) to (4-4) into a discrete data visualization processing module, performing interpolation calculation (IDW (inverse distance weighted) interpolation and cubic spline interpolation) in the three-dimensional model by using a space combination interpolation algorithm to obtain temperature values of all coordinate positions in the space, viewing a reasonably calculated temperature field through a visualization terminal interface, setting a corresponding color table, wherein different temperatures correspond to different colors, so that the temperature change condition in the space is represented by the colors, the visualization of the discrete data is realized, and a color cloud picture calculated by interpolation is shown in fig. 5, and fig. 6 is a fault point display picture.

It can be seen from fig. 6 that (1) gray spots (fig. 6, reference numeral 1) appear; if the grey is displayed in the figure, the temperature measuring system fails, and the temperature sensor, the transmission line and the display system need to be checked in sequence during the next overhaul.

(2) Individual erythema (fig. 6 at 2): the relationship between the temperature and the active and reactive loads should be analyzed and the test point checked for normality. If the 'stator grounding' signal appears under the condition that the temperature of the iron core and the temperature difference of inlet and outlet air are obviously increased, the load is immediately reduced, the machine is disconnected and stopped, and the iron core is prevented from being burnt out.

(3) Erythema is increased with a tendency to concaten (3 in FIG. 6): whether the three-phase current of the stator is balanced, the temperature difference between the inlet air temperature and the outlet air temperature and the cooling water of the air cooler are normal or not should be checked, and corresponding measures are taken for processing. In the above process, the temperature of the stator core should be controlled not to exceed the allowable value, otherwise the load should be reduced and the machine should be stopped.

The temperature field of the visual terminal interface can be translated, zoomed and rotated to display for multi-angle viewing.

The invention is based on OpenGL development terminal operation interface in Microsoft Visual Studio 2016 software platform, as shown in FIG. 3. The real-time communication with the lower computer is realized by utilizing an RS485 serial port communication protocol, and the temperature sensor sends the temperature acquired in real time to the upper computer. The discrete data cleaning module and the fault point analysis module are mainly programmed through a Python language, the discrete data visualization processing module and the visualization terminal interface utilize C + + language programming with higher calculation speed and longer development history, the multiple spatial interpolation algorithm mentioned above is compiled by C + +, and color rendering of temperature data is performed, so that visualization of discrete data is realized. The visual terminal interface is also provided with a data storage function, any collected data can be stored as txt document, and the sensor position display function can display the distribution condition of the temperature sensors.

Compared with the traditional hydropower station generator temperature monitoring interface, the temperature distribution monitoring system can realize real-time all-around and multi-angle monitoring on the temperature distribution, intuitively judge the running condition of the generator, and further be used for a fault diagnosis and early warning system while realizing the generator state monitoring.

While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.