A monitoring and analysis system and method for power plant operation status

Abstract

The invention discloses a monitoring and analysis system and method for the operation status of a power plant, and specifically relates to the technical field of power plant monitoring. According to the invention, when an application system is deployed, an electric meter is connected to a server through a serial port, and multiple electric meters can be indirectly connected to the server using multiple serial services. Each time data needs to be collected, a component-related interface can be called, and electric meter-related parameters are passed in. The component can automatically initiate a connection to the electric meter, and perform protocol communication of DLT645-1997 or DLT645-2007, automatically assemble a request message, and request specified data. The application system sends a communication parameter of a specified type to the component, and the component assembles different protocol messages according to different types. Each application system can quickly access the electric meter communication protocol component, and only needs to integrate the SDK of the component into its own application system or a separate collection service, and will not cause any impact on the existing business logic, thereby reducing the coupling degree and improving the development efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power plant monitoring, and more specifically, to a monitoring and analysis system and method for the operating status of a power plant. Background Art

[0002] The actual state of the electrical operation process of a thermal power plant has an important impact on the normal production of the power plant, so it is necessary to strengthen the management of power generation operation. The management of electrical equipment involves many aspects, including equipment procurement, equipment installation and commissioning, equipment use, equipment maintenance, etc., which are complex and comprehensive, and difficult. In addition, the electrical equipment of a thermal power plant also has the characteristics of complex structure, large volume, and large number. Each device has different performance and use requirements. In order to ensure that all electrical equipment can achieve safe, stable and reliable operation, it is extremely necessary to strengthen its operation management. Only in this way can the performance of the entire equipment be maximized, and the healthy and sustainable development of thermal power plants can be promoted while improving work efficiency.

[0003] Condition-based maintenance, as a scientific equipment maintenance management method, is gradually gaining attention from power plants. Equipment condition monitoring and fault diagnosis technology (vibration, infrared, ultrasound, oil monitoring and analysis, etc.) and equipment reliability assessment provide a solid technical foundation for the implementation of condition-based maintenance in thermal power plants. The promotion and implementation of condition-based maintenance is based on the technical foundation on one hand, and the other important aspect is to establish and improve the corresponding management mechanism to solve the implementation model.

[0004] In hydropower generation, the turbine in the hydropower plant can be fully utilized to achieve the effective conversion of water energy and mechanical energy, thereby ultimately driving the generator to rotate and generate power machinery, which is also one of the important core equipment in hydropower generation. Therefore, it is necessary to ensure its safe and stable operation and provide a good development platform for the safe production and economic benefits of the hydropower plant. In hydropower generation, it is necessary to achieve a complete design based on the head and related power. In this case, the water flow comes in from the volute, and after passing through the guide vane, it is operated in a non-impact manner, so that there will be no plate flow on the front and back of the blade surface, and finally achieve the stable operation efficiency of the hydropower plant, improve work efficiency, and maximize the use of the minimum hydraulic resources to complete the maximum electrical resources. If there is a deviation from the design during the operation process, the water flow will have a strong impact during power generation, and eventually pressure pulsation will occur, and vortex belts will also occur in the tailwater pipe, causing the turbine in the hydropower unit system to produce considerable vibration, and cracks will also occur in the part where the water flows, causing unstable operation, reducing the efficiency of operation, and ultimately causing serious impact on economic losses.

[0005] First of all, the staff of the hydropower unit needs to fully understand the operating conditions and characteristics of various hydropower units, so as to minimize the load operation or even no-load operation. When the water level in the reservoir is already in a normal and reasonable state, it is necessary to ensure that the efficiency of the hydropower unit can be constantly prompted within a certain range to reduce the water consumption rate. Therefore, in the management of the hydropower unit, the staff needs to publicize the scope of stable operation of the turbine and the characteristic indicators of its stable operation to the dispatching department on the one hand, and avoid exceeding the stable operation range stipulated by the international regulations when making adjustments. On the other hand, it is also necessary to control the indicators of each hydropower unit to achieve stable operation, and it can also be tested online. If it is found that there is an over-standard phenomenon, the on-duty personnel are required to discover it in time and make adjustments and maintenance. Finally, when testing the normal operating status of the hydropower unit, it is necessary to analyze the actual operating status of each generator set. In the actual operation under this situation, the dispatching personnel of the system itself need to complete it, fundamentally ensuring the safe and stable operation of the hydropower unit.

[0006] Secondly, in the working mode of power generation, it can be mainly divided into six modes: shutdown, standby, grid status monitoring, startup, operation and fault, in which mutual conversion can be carried out, such as Figure 1 As shown. In this power generation operation mode, strict requirements are made for the characteristics of each power generation port, so it is necessary to fully study the stability and dynamic characteristics of its power generation operation, among which it is necessary to fully understand and master the distribution characteristics of different distribution units and their power generation system ports. At this stage, the DC component has become a problem of safety and reliability coexisting. In the power generation operation, there will be leakage current to the ground to a certain extent, so it is necessary to control its operation process. In the process of adjusting the turbine system, it is necessary to ensure that the frequency adjustment mode of its no-load operation is in a normal state. In this case, the grid-connected opening adjustment mode can be operated, and the power adjustment mode can also be carried out. When converting the adjustment mode, it is necessary to ensure the completeness of the parameters, and finally realize the normal use of the no-load frequency mode of the unit. In the turbine regulation system, it has the ability to automatically identify the isolated network. If there is a thin line jump between the unit and the large power grid, the unit can automatically judge and switch to the isolated operation mode faster. If the inlet temperature is not properly controlled, it is easy for the temperature to drop below the allowable value during the boost process or when approaching the test pressure. This situation is quite dangerous and special attention should be paid to prevent it.

[0007] At present, a large number of early power plants still rely on manual meter reading to record power generation data, and analyze the operating status of power plants and count the power generation of power plants through manual calculations, which greatly consumes manpower costs and power plant operating costs. Once the personnel data is copied incorrectly, it will cause a huge error in the analysis of the operating status of the power plant, and inaccurate power generation data will also affect the power generation dispatch of the dispatching unit. After a large amount of meter-related data is stored, if it is processed as a whole, it may cause a large overall computing load, resulting in unsatisfactory overall data processing efficiency, and affecting the overall data analysis and processing performance. Therefore, a monitoring and analysis system and method for the operating status of a power plant is needed to solve the above problems. Summary of the invention

[0008] In order to overcome the above-mentioned defects of the prior art, the present invention provides a monitoring and analysis system and method for the operating status of a power plant. The technical problem to be solved by the present invention is: analyzing the operating status of the power plant and counting the power generation of the power plant through manual calculation greatly consumes manpower costs and power plant operating costs, and once the personnel data are copied incorrectly, it will cause a huge error in the analysis of the operating status of the power plant, and inaccurate power generation data will also affect the power generation scheduling of the dispatching unit. After a large amount of meter-related data is stored, if it is processed as a whole, it may cause a large overall computing load, resulting in unsatisfactory overall data processing efficiency, and the overall data analysis and processing performance is affected.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a monitoring and analysis system for the operating status of a power plant, comprising a DLT communication component, an electric energy meter and an application system, wherein the DLT communication component comprises a core module and a business interface, the core module is bidirectionally connected to the electric energy meter, the input end of the core module is electrically connected to the output end of the business interface, and the DLT communication component is bidirectionally connected to the application system.

[0010] As a further solution of the present invention: the core module includes a sending processor, a receiving processor, a message processor, a parsing processor and a connection processor, the connection processor is bidirectionally connected to the electric energy meter through serial port communication, the input end of the connection processor is electrically connected to the output end of the sending processor, the input end of the sending processor is electrically connected to the output end of the message processor, the output end of the connection processor is electrically connected to the input end of the receiving processor, and the output end of the receiving processor is electrically connected to the input end of the parsing processor.

[0011] As a further solution of the present invention: the business interface is used for: reading electric energy data, reading maximum demand data, reading maximum demand occurrence time data, reading variable data, reading parameter data, reading load record data and writing meter configuration.

[0012] As a further solution of the present invention: the core module is used to define the basic properties and methods required to implement protocol communication;

[0013] The business interface is used to call each processor in the core module, assemble a data request or meter configuration message, then call the connection established by the connection processor and wake up the meter serial port to establish a connection, then execute the data request or meter configuration in sequence, and return the corresponding response.

[0014] As a further solution of the present invention: the application system includes a data extraction unit, the output end of the data extraction unit is electrically connected to the output end of the data sorting and analysis unit, the output end of the data sorting and analysis unit is electrically connected to the input end of the data encoding unit, and the output end of the data encoding unit is electrically connected to the input end of the data comparison unit.

[0015] As a further solution of the present invention: the data extraction unit is used to obtain the data of the previous normal operation status monitoring in the database;

[0016] The data sorting and analysis unit is used to sort the above acquired data into the same format, and calculate the data to obtain the safety floating range of the corresponding project data;

[0017] The data encoding unit is used to encode the results of the above-mentioned collation and analysis, and to encode the obtained message data;

[0018] The data comparison unit is used to compare the encoded message data with the encoded data safety floating range to determine whether the message data is within the safety range.

[0019] A method for monitoring and analyzing the operating status of a power plant comprises the following steps:

[0020] S1. After the interface service is called, the interface service assembles all message frame statements of the request target according to the parameters transmitted by the service, and then calls the connection processor to send a communication request to the meter to establish a communication connection. After the connection is successful, the request message is sent to the meter in turn. When the message sent is a write configuration message, the response message is received and the corresponding message of the message is returned to the application;

[0021] S2. When the message sent is a data request message, monitor the response message and parse the response message to determine whether there is a subsequent data message. If there is a subsequent data message, continue to monitor and accept it;

[0022] S3. If there is no subsequent data message, the connection is closed and the message is checked to see if it is correct. If the message is correct, the message data is parsed and returned to the application.

[0023] S4. When an exception occurs in the message verification, a message corresponding to the abnormal message is directly returned to the application.

[0024] The beneficial effects of the present invention are:

[0025] 1. In the present invention, when the application system is deployed, the electric meter is connected to the server through the serial port. Multiple electric meters can be indirectly connected to the server using multiple serial services. Each time data needs to be collected, the component-related interface can be called, and the meter-related parameters can be passed in. The component can automatically initiate a connection to the electric meter, and perform protocol communication of DLT645-1997 or DLT645-2007, automatically assemble request messages, request specified data, and automatically parse the message responded by the electric meter into readable data. After completing this data communication and obtaining the specified data, the application system interface will be called back to transmit the data to the application system. The application system sends the communication parameters of the specified type to the component. The component assembles different protocol messages according to different types. Each application system can quickly access the meter communication protocol component. It only needs to integrate the SDK of this component into its own application system or a separate collection service, and it will not cause any impact on the existing business logic, reduce the coupling degree, and improve development efficiency.

[0026] 2. The present invention adopts a data extraction unit, a data sorting and analysis unit, a data encoding unit and a data comparison unit. The data extraction unit obtains historical monitoring data, and then the data sorting and analysis unit is used to sort and analyze the acquired historical detection data and derive a safe floating range of the corresponding data. The data encoding unit encodes the safe floating range of the corresponding data and encodes the obtained message data at the same time, thereby realizing the encoding storage and subsequent comparison steps of the acquired data, reducing the data storage capacity, reducing the load level when processing data, and making the overall data processing stable and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a functional module structure diagram of the present invention;

[0028] Figure 2 It is a business logic flow chart of the present invention;

[0029] Figure 3 This is a flowchart of the present invention when the application is running;

[0030] Figure 4 The figure is a logic flow chart of the application system of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-4 As shown, the present invention provides a monitoring and analysis system for the operating status of a power plant, including a DLT communication component, an electric energy meter and an application system. The DLT communication component includes a core module and a business interface. The core module is bidirectionally connected to the electric energy meter, the input end of the core module is electrically connected to the output end of the business interface, and the DLT communication component is bidirectionally connected to the application system.

[0033] The core module includes a sending processor, a receiving processor, a message processor, a parsing processor and a connection processor. The connection processor is bidirectionally connected to the electric energy meter through serial port communication. The input end of the connection processor is electrically connected to the output end of the sending processor, the input end of the sending processor is electrically connected to the output end of the message processor, the output end of the connection processor is electrically connected to the input end of the receiving processor, and the output end of the receiving processor is electrically connected to the input end of the parsing processor.

[0034] The business interface is used for: reading electric energy data, reading maximum demand data, reading maximum demand occurrence time data, reading variable data, reading parameter data, reading load record data and writing meter configuration.

[0035] The core module is used to define the basic properties and methods required to implement protocol communication;

[0036] The business interface is used to call each processor in the core module, assemble the data request or meter configuration message, then call the connection established by the connection processor and wake up the meter serial port to establish a connection, then execute the data request or meter configuration in sequence, and return the corresponding response.

[0037] The application system includes a data extraction unit, the output end of the data extraction unit is electrically connected to the output end of the data sorting and analysis unit, the output end of the data sorting and analysis unit is electrically connected to the input end of the data encoding unit, and the output end of the data encoding unit is electrically connected to the input end of the data comparison unit.

[0038] The data extraction unit is used to obtain the data of the previous normal operation status monitoring in the database;

[0039] The data sorting and analysis unit is used to sort the above acquired data into the same format, and calculate the data to obtain the safety floating range of the corresponding project data;

[0040] The data encoding unit is used to encode the results of the above collation and analysis, and to encode the obtained message data;

[0041] The data comparison unit is used to compare the encoded message data with the encoded data safety floating range to determine whether the message data is within the safety range.

[0042] A method for monitoring and analyzing the operating status of a power plant comprises the following steps:

[0043] S1. After the interface service is called, the interface service assembles all message frame statements of the request target according to the parameters transmitted by the service, and then calls the connection processor to send a communication request to the meter to establish a communication connection. After the connection is successful, the request message is sent to the meter in turn. When the message sent is a write configuration message, the response message is received and the corresponding message of the message is returned to the application;

[0044] S2. When the message sent is a data request message, monitor the response message and parse the response message to determine whether there is a subsequent data message. If there is a subsequent data message, continue to monitor and accept it;

[0045] S3. If there is no subsequent data message, the connection is closed and the message is checked to see if it is correct. If the message is correct, the message data is parsed and returned to the application.

[0046] S4. When an exception occurs in the message verification, a message corresponding to the abnormal message is directly returned to the application.

[0047] In summary, in the present invention:

[0048] The present invention connects the electric meter to the server through the serial port when the application system is deployed. Multiple electric meters can be indirectly connected to the server using multiple serial services. Each time data needs to be collected, the component-related interface can be called and the electric meter-related parameters can be passed in. The component can automatically initiate a connection to the electric meter and perform protocol communication of DLT645-1997 or DLT645-2007, automatically assemble request messages, request specified data, and automatically parse the message responded by the electric meter into readable data. After completing this data communication and obtaining the specified data, the application system interface will be called back to transmit the data to the application system. The application system sends the communication parameters of the specified type to the component. The component assembles different protocol messages according to different types. Each application system can quickly access the electric meter communication protocol component. It only needs to integrate the SDK of this component into its own application system or a separate collection service, and it will not cause any impact on the existing business logic, thereby reducing the coupling degree and improving the development efficiency.

[0049] The present invention adopts a data extraction unit, a data sorting and analysis unit, a data encoding unit and a data comparison unit. The data extraction unit obtains historical monitoring data, and then the data sorting and analysis unit is used to sort and analyze the acquired historical detection data and obtain the safe floating range of the corresponding data. The data encoding unit encodes the safe floating range of the corresponding data and encodes the obtained message data at the same time, thereby realizing the encoding storage and subsequent comparison steps of the acquired data, reducing the capacity of data storage, reducing the load level when processing data, and making the overall data processing stable and efficient.

[0050] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0051] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A monitoring and analysis system for the operation status of a power plant, comprising a DLT communication component, an electric energy meter and an application system, characterized in that: The DLT communication component includes a core module and a business interface, the core module is bidirectionally connected to the electric energy meter, the input end of the core module is electrically connected to the output end of the business interface, and the DLT communication component is bidirectionally connected to the application system; The core module includes a sending processor, a receiving processor, a message processor, a parsing processor and a connection processor, wherein the connection processor is bidirectionally connected to the electric energy meter via serial port communication, an input end of the connection processor is electrically connected to an output end of the sending processor, an input end of the sending processor is electrically connected to an output end of the message processor, an output end of the connection processor is electrically connected to an input end of the receiving processor, and an output end of the receiving processor is electrically connected to an input end of the parsing processor; The core module is used to define the basic properties and methods required to implement protocol communication; The service interface is used to call each processor in the core module, assemble a message of data request or meter configuration, then call the connection established by the connection processor and wake up the meter serial port to establish a connection, then execute the data request or meter configuration in sequence, and return the corresponding response; The application system comprises a data extraction unit, the output end of the data extraction unit is electrically connected to the input end of the data sorting and analysis unit, the output end of the data sorting and analysis unit is electrically connected to the input end of the data encoding unit, and the output end of the data encoding unit is electrically connected to the input end of the data comparison unit; The data extraction unit is used to obtain the data of the previous normal operation status monitoring in the database; The data sorting and analysis unit is used to sort the acquired data into the same format and calculate the data to obtain the safety floating range of the corresponding project data; The data encoding unit is used to encode the results of the collation and analysis, and to encode the obtained message data; The data comparison unit is used to compare the encoded message data with the encoded data safety floating range to determine whether the message data is within the safety range.

2. A monitoring and analysis system for power plant operation status according to claim 1, characterized in that: The business interface is used for: reading electric energy data, reading maximum demand data, reading maximum demand occurrence time data, reading variable data, reading parameter data, reading load record data and writing meter configuration.

3. A method for monitoring and analyzing the operating status of a power plant, applied to the monitoring and analyzing system for the operating status of a power plant according to claim 2, characterized in that: The following steps are involved: S1. After the interface service is called, the interface service assembles all message frame statements of the request target according to the parameters transmitted by the service, and then calls the connection processor to send a communication request to the meter to establish a communication connection. After the connection is successful, the request message is sent to the meter in turn. When the message sent is a write configuration message, the response message is received and the corresponding message of the message is returned to the application; S2. When the message sent is a data request message, monitor the response message and parse the response message to determine whether there is a subsequent data message. If there is a subsequent data message, continue to monitor and accept it; S3. If there is no subsequent data message, the connection is closed and the message is checked to see if it is correct. If the message is correct, the message data is parsed and returned to the application. S4. When an exception occurs in the message verification, a message corresponding to the abnormal message is directly returned to the application.

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