CN103839302B - A kind of thermal power plant's intelligent inspection system and method - Google Patents

Abstract

A kind of thermal power plant's intelligent inspection system and method, this system comprises wireless industrial Ethernet, patrols and examines data center and Multifunctional inspecting terminal with wireless industrial Ethernet by wireless connections; Patrol and examine data center and power station D C S and S I S system is connected, and has the synchronous clock period, can inquire about, read, write power station D C S and S I real-time and the historical data base of S system; Patrolling and examining data center drives Multifunctional inspecting terminal to carry out data sampling to patrolling and examining target by wireless industrial Ethernet, and carries out exchanges data with Multifunctional inspecting terminal; The present invention also provides the method for inspecting of this system, adopt wireless telecommunications and power plant D C S system carries out clock synchronous, adopt Multifunctional inspecting terminal, the various diagnostic signal of convenient collection, and with original D C S system data are integrated, and the data of patrolling and examining under similar operating condition are carried out to trend analysis and commented certificate, and prompting patrol officer grasps the operation conditions of equipment and parts, carry out care and maintenance in time, improve the security of operation stability of plant maintenance level and system.

Description

A thermal power plant intelligent inspection system and method

technical field

The invention relates to the technical field of inspection of thermal power plant equipment, in particular to an intelligent inspection system and method for thermal power plant.

Background technique

The thermal power generation system is huge and complex, and the safe and stable operation of a large number of equipment and components is related to the safety and stability of the entire power system. Most of these equipment and components have been in the dangerous operating environment of high temperature, high pressure, and high speed for a long time, and special personnel need to be arranged Carry out regular fixed-point inspections to ensure the safety of the system and hope to discover potential dangers in advance to avoid accidents.

Due to the complexity and variety of inspection equipment, the types of data and physical quantities required for inspection by various equipment are different, so the data collection and analysis of existing power plant inspections mostly rely on manual methods. In addition, key parameters such as vibration and temperature of equipment components change with system operating conditions, and the level of manual inspection is limited by the level of inspection personnel and data analysis personnel, making it difficult to guarantee. In recent years, many inspection management terminals or systems based on barcode or radio frequency technology have emerged, which are convenient to ensure that there are no omissions in the inspection points, facilitate on-site data entry, and realize inspection data statistics and alarm prompts, but on the one hand, their detection functions are limited. , mostly focuses on the management of the inspection process, and is independent of the unit control system. The inspection function depends heavily on the experience and level of the inspection personnel, and does not meet the needs of modern smart power plants and digital power plants. On the other hand, the existing patrol inspection technology mainly relies on the brains of the patrol inspectors for rough analysis and judgment, and the accuracy and depth of data processing are severely limited. For the reverse prompt function, due to the independence of the system, it is difficult to upgrade the function, so that the role of the inspection work and the value of the inspection data cannot be fully utilized.

Contents of the invention

In order to solve the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide an intelligent inspection system and method for a thermal power plant, which uses wireless communication to synchronize clocks with the DCS system of the power plant, and uses a multifunctional portable inspection terminal to facilitate the collection of various Diagnose the signal and integrate it with the original DCS system data, analyze and evaluate the trend of the inspection data under similar working conditions, and prompt the inspection personnel and management personnel to master the operation of equipment and components according to the trend change and statistical analysis of the value Conditions, timely maintenance and maintenance, improve equipment maintenance level and system operation safety and stability.

To achieve the above object, the present invention adopts the following technical solutions:

An intelligent inspection system for a thermal power plant, comprising a wireless industrial Ethernet 3, an inspection data center 2 and a multifunctional inspection terminal 4 wirelessly connected to the wireless industrial Ethernet 3; the inspection data center 2 is connected to the power station DCS and The SIS system 1 is connected, has a synchronous clock cycle, and can query, read, and write the real-time and historical databases of the DCS of the power station and the SIS system 1: the inspection data center 2 drives 4 pairs of multi-functional inspection terminals through the wireless industrial Ethernet 3 The inspection target 6 performs data sampling and exchanges data with the multi-functional inspection terminal 4 .

The multifunctional inspection terminal 4 includes an infrared temperature acquisition sensor, a vibration acquisition sensor, a sound wave acquisition sensor and a video image acquisition sensor, and is also equipped with a fingerprint reader for identifying the identity of the inspector 5 .

In the inspection method of the above-mentioned thermal power plant intelligent inspection system, the inspector 5 goes to each inspection target 6 with the multi-function inspection terminal 4 according to the inspection point list and the location prompt displayed by the multi-function inspection terminal 4, and passes The fingerprint reader on the multi-function inspection terminal 4 starts to scan the identification barcode or radio frequency device installed on the inspection target 6. After the scan is successful, the multi-function inspection terminal 4 automatically transfers the identity information of the inspector 5 and the inspection target 6 The information of the inspection data is uploaded to the inspection data center 2, and the inspection data center 2 searches the inspection item information from the preset inspection information database according to the information of the inspection object 6, and sends the inspection operation process list of the inspection object 6 to the multi-function The inspection terminal 4 and the inspector 5 sequentially start the sensors corresponding to the multi-function inspection terminal 4 to collect data according to the inspection operation flow list returned by the inspection data center 2, and manually input the readings of the on-site meters as required, and perform the inspection. The data center 2 performs corresponding analysis and calculation on the data returned by the multi-function inspection terminal 4, and sends the data to the DCS database of the power station DCS and SIS system 1 according to the DCS synchronous clock, and obtains from the DCS database according to the time stamp of the data Relevant system operating parameters are used as the characteristic identification of the current operating condition. According to the characteristic identification, the historical inspection data of similar operating conditions are retrieved from the DCS historical database and statistically analyzed. Judgment, giving guiding maintenance and maintenance opinions; when all the inspection items of an inspection target are completed, the multi-functional inspection terminal 4 will prompt the location of the inspection target that has not been inspected, and guide the inspector 5 to the next inspection Check target 6.

Compared with the prior art, the present invention has the following advantages:

1. The inspection system of the present invention has an intelligent reverse prompt function, which can use the operating condition data of the relevant system to identify the inspection data, and analyze the change trend of the inspection target through the inspection history data under similar working conditions. Intelligent reverse prompts are given based on trend changes and statistical analysis abnormalities of data signals, which can eliminate the main impact of environmental changes and changes in power station operating conditions on the status of inspection targets, thereby identifying subtle changes in equipment or components, and grasping inspection targets. The development trend of the state of the system, so as to detect and perform necessary maintenance and processing before abnormalities or failures occur. Existing inspection technology still stays at the threshold inspection level, that is, regardless of changes in the environment or system operating conditions, one or several parameters of the inspection target can be detected and determined to be within the general threshold range. Therefore, Generally, the problem can only be found when the equipment fails or is obviously abnormal. For domestic thermal power plants whose working conditions generally change greatly with time and seasons, the change of operating conditions has a significant impact on the status of inspection equipment. For example, the vibration of the outlet pipeline of the water pump is closely related to the speed of the pump. If the speed of the water pump that is synchronized with the inspection and collection time cannot be obtained, the analysis and judgment of the vibration is almost meaningless. The present invention solves this kind of defect of the traditional inspection technology. Automatically retrieve historical inspection data under the same operating conditions, so as to accurately analyze, judge and intelligently reverse the current inspection results.

2. The inspection center server is interconnected with the inherent DCS and SIS systems of the power station, and has a synchronous time period. Existing inspection technologies basically use an independent external system, which only processes inspection records and inspection management information data, and can only rely on extensive boundary thresholds and the experience of inspection personnel to judge the operating status of inspection targets. The system of the present invention and the power plant DCS synchronous time period can conveniently integrate the inspection data into the database of the power plant DCS and SIS on the one hand, which is convenient to query, store and analyze together with other parameters of the power plant; Determine the detection time of the inspection data, and obtain the values of other operating parameters of the system at this time, accurately identify the operation and environmental status when the inspection data is collected, and lay the foundation for in-depth analysis based on the inspection data, which is convenient for upper-level systems such as power plant SIS Apply the data of the inspection system for further advanced applications and analysis such as condition-based maintenance and big data mining.

3. Adopt an all-in-one inspection terminal including temperature detection, vibration detection, acoustic noise detection, video image acquisition and manual recording functions. Most of the existing inspection terminal equipment is limited to the information management level of processing inspection point location information and manual input, and some inspection terminals are equipped with infrared temperature monitoring devices. For power plant systems, most of the equipment is running at high speed or connected to high-speed running equipment, and its vibration amplitude and frequency are greatly affected by the operating state of the equipment and invisible internal damage, which can be automatically analyzed in advance through vibration inspection data Discover potential vibration and strength problems and avoid unnecessary accidents and losses. Both solid vibration and fluid flow will generate sound waves and noise with certain frequency characteristics. Sampling and analysis of sound waves and noise inside the device and system inspection points can obtain the internal rotation, vibration and flow status of the equipment. These data rely on people, Workmanship cannot be known from the appearance, and it is of great significance to rotating machinery, invisible valve opening state detection, damper and furnace flow detection, which cannot be realized by existing inspection technology. In addition, the environment of the power plant is complex, and there are many technological processes. A large number of faults and problems are manifested in various visual phenomena such as oil leakage, shaking, discoloration, and steam leakage. These phenomena cannot be collected and recorded by general inspection terminals. Text records It is difficult to reflect the complex on-site situation, so video or image recording can make the on-site inspection results more accurate and rich, which is of great significance for the full record of fault data, post-fault analysis and remote diagnosis, etc., which is also the existing Inspection technology does not have.

4. The present invention has a synchronous interface with the existing DCS and SIS systems of the power plant, which facilitates the upgrade of inspection system functions and the development of various advanced applications of inspection data, and can be a powerful supplement to the construction of future smart power plants and digital power plants. Various SIS systems have developed a large number of advanced applications and functions based on power plant operating data. By adopting the present invention, discontinuous inspection data can be incorporated into the big data analysis platform, which facilitates the development, upgrade and application of remote diagnosis, condition maintenance or other advanced functions. , while existing inspection technologies basically use isolated systems, whose function upgrades and development rely on the support of their own limited software and hardware platforms, and lack the support of unit operating parameters and other data, so it is often difficult to realize.

Description of drawings

The accompanying drawing is a structural schematic diagram of an intelligent inspection system for a thermal power plant according to the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in the accompanying drawings, a thermal power plant intelligent inspection system of the present invention includes a wireless industrial Ethernet 3, an inspection data center 2 and a multifunctional inspection terminal 4 wirelessly connected to the wireless industrial Ethernet 3; The inspection data center 2 is connected with the power station DCS and SIS system 1, has a synchronous clock cycle, and can query, read, and write the real-time and historical databases of the power station DCS and SIS system 1; the inspection data center 2 passes through the wireless industrial Ethernet 3 The multi-functional inspection terminal 4 is driven to sample data of the inspection target 6 and exchange data with the multi-functional inspection terminal 4 .

The multifunctional inspection terminal 4 includes an infrared temperature acquisition sensor, a vibration acquisition sensor, a sound wave acquisition sensor and a video image acquisition sensor, and is also equipped with a fingerprint reader for identifying the identity of the inspector 5 .

The present invention also provides an inspection method for the above-mentioned thermal power plant intelligent inspection system. The inspector 5 proceeds to an inspection target 6 with a hand-held multi-function inspection terminal 4 according to the inspection point list and location prompts displayed by the multi-function inspection terminal 4. Finally, through the fingerprint reader on the multi-functional inspection terminal 4, after the multi-functional inspection terminal 4 is verified by the fingerprint information of the inspector 5, the inspection point scanner is started to scan the inspection target 6 identification barcode or radio frequency device, After the scan is successful, the multi-functional inspection terminal 4 automatically uploads the identity information of the inspector 5 and the information of the inspection target 6 to the inspection data center 2, and the inspection data center 2 starts from the preset inspection data center 2 according to the information of the inspection target 6. Search the inspection project information in the inspection information database, send the inspection operation process list of the inspection target 6 to the multi-function inspection terminal 4, and the inspector 5 starts the multi-function inspection in sequence according to the inspection operation flow list returned by the inspection data center 2 The infrared temperature acquisition sensor, vibration acquisition sensor, and sound wave acquisition sensor corresponding to the inspection terminal 4, some inspection points need to start video image acquisition, and the inspection data center 2 performs corresponding analysis and calculation on the data returned by the multi-functional inspection terminal 4, And according to the DCS synchronization clock, the data is sent to the DCS database of the power station DCS and SIS system 1, and the relevant system operating parameters are obtained from the DCS database according to the time tag of the data as the characteristic identification of the current operating condition. Retrieve the inspection history data of similar working conditions in the database and perform statistical analysis, draw the historical change trend of each index parameter, and prompt the inspection personnel to make a judgment according to the trend change and statistical analysis of the numerical value, and carry out more in-depth inspection when necessary For detection and maintenance, according to the needs of different inspection points, the terminal will also prompt the inspector 5 to manually input the on-site instrument readings or other parameters visually inspected. When all the inspection items of an inspection target are completed, the multi-functional inspection terminal 4 prompts the position of the inspection target that has not been inspected, and guides the inspector 5 to the next inspection target 6 .

Claims (1)

1. a method for inspection of thermal power plant intelligent inspection system, said system includes wireless industrial Ethernet (3), with wireless industrial Ethernet (3) by wirelessly connected inspection data center (2) and multi-functional inspection Inspection terminal (4); the inspection data center (2) is connected with the DCS and SIS system (1) of the power station, has a synchronous clock cycle, and can query, read, and write the real-time data of the DCS and SIS system (1) of the power station and historical database; the inspection data center (2) drives the multi-function inspection terminal (4) to sample data of the inspection target (6) through the wireless industrial Ethernet (3), and conducts data sampling with the multi-function inspection terminal (4) Data exchange; the multi-functional inspection terminal (4) includes an infrared temperature acquisition sensor, a vibration acquisition sensor, a sound wave acquisition sensor and a video image acquisition sensor, and is also equipped with a fingerprint reader for identifying the identity of the inspector (5); its features In that: the inspection method is: the inspector (5) goes to each inspection target (6) according to the inspection point list and the position prompt displayed by the multi-function inspection terminal (4) with a hand-held multi-function inspection terminal (4). ), through the fingerprint reader on the multi-functional inspection terminal (4) to start scanning the identification barcode or radio frequency device installed on the inspection target (6), after the scan is successful, the multi-functional inspection terminal (4) will automatically scan the The identity information of the personnel (5) and the information of the inspection target (6) are uploaded to the inspection data center (2), and the inspection data center (2) selects the information from the preset inspection information base according to the information of the inspection target (6). Find the inspection item information, send the inspection operation process list of the inspection target (6) to the multi-function inspection terminal (4), and the inspector (5) will follow the inspection operation process list returned by the inspection data center (2) in order Start the sensor corresponding to the multi-functional inspection terminal (4) to collect data, and manually input the readings of the local meters as required, and the inspection data center (2) performs corresponding processing on the data returned by the multi-functional inspection terminal (4). Analyze and calculate, and send the data to the DCS database of the power station DCS and SIS system (1) according to the DCS synchronous clock, and at the same time obtain the relevant system operating parameters from the DCS database according to the time tag of the data as the characteristic identification of the current operating condition, according to the Feature identification retrieves historical inspection data of similar working conditions from the DCS historical database and performs statistical analysis, prompts inspection personnel to make judgments based on trend changes and abnormal statistical analysis of values, and gives guiding maintenance and maintenance opinions; when a patrol inspection After all the inspection items of the target are completed, the multi-functional inspection terminal (4) prompts the position of the inspection target that has not been inspected, and guides the inspector (5) to the next inspection target (6).