A method and system for collecting electric energy and power data
By collecting and processing the bidirectional power and electrical energy data of the motor in the motor acquisition system, the problems of low data accuracy and high failure rate in the prior art are solved, and precise monitoring and management of the motor energy consumption and power generation situation are achieved.
Patent Information
- Application Number
- CN202411602396.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-04-04
AI Technical Summary
The existing electrical energy and power acquisition methods cannot effectively process the bidirectional power and power data of the motor in different modes. The data accuracy is limited and the failure rate is high, so it is impossible to achieve accurate collection and efficient management of the forward and reverse power and electrical energy of the motor.
Data is collected through the first device, output power and electric energy accumulation based on real-time data, and data storage and output are adopted to realize the comprehensive acquisition and management of the forward and reverse power and electric energy of the motor.
It realizes accurate collection and management of bidirectional power and electrical energy data of the motor in different modes, improves data accuracy and system stability, reduces maintenance costs, and supports long-term data accumulation and analysis.
Smart Images
Figure CN119765622A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of intelligent operation and maintenance and electric energy management, and specifically to a method and system for collecting electric energy and power data. Background Art
[0002] In modern power plants, in order to ensure the efficient operation and stability of equipment, the electric energy and power data of important motors need to be collected and monitored in real time in order to optimize the energy consumption of equipment and improve overall operational efficiency. At present, the power and electric energy collection of power plant motors mainly depends on relay protection devices, which have the basic function of collecting forward power and electric energy in traditional technology. These relay protection devices can make preliminary judgments and fault protection on the operating status of motors by monitoring current and voltage signals. However, with the upgrading and transformation of power plant equipment, the limitations of traditional relay protection devices in data collection have gradually emerged. For example, with the transformation of equipment such as induced draft fans, the motor has added a steam-driven power generation operation mode in addition to the traditional electric mode, which makes the motor not only an energy consuming device, but also a power generation device for energy feedback under certain conditions. However, the existing relay protection devices can only collect forward power and electric energy data in these cases, and cannot cope with the complex needs of equipment operating in multiple modes. In addition, although the traditional multi-function electricity meter can collect positive and negative active / reactive energy and power, its analog circuit has serious reliability problems, especially in complex power environments, which are prone to breakdown or even spontaneous combustion, leading to failure of the motor control protection circuit and threatening the normal operation of the equipment. These problems have become more prominent and cannot be ignored in the context of power plant equipment modernization and energy conservation and consumption reduction.
[0003] In order to solve the above problems, some power plants have tried to install multi-function electricity meters to expand the collection function during the equipment upgrade and transformation process, and transmit the data of forward and reverse active / reactive electric energy and forward and reverse power to the monitoring background. However, this solution is not ideal. The high failure rate of the multi-function electricity meter not only increases the maintenance cost, but also leads to inaccurate data collection, thereby affecting the calculation of the plant power consumption rate and the precise control of the power plant operation. In addition, the addition of a multi-function electricity meter may also increase the complexity of the entire motor control loop, especially under certain specific operating conditions, which will increase the burden on the monitoring system and reduce the overall stability of the system. Therefore, the existing technology cannot simultaneously process the data of forward and reverse power and electric energy when the equipment operation mode is diversified, which seriously restricts the intelligent management and energy consumption optimization of the equipment. Summary of the invention
[0004] In view of the above-mentioned problems, the present invention is proposed.
[0005] Therefore, the technical problem solved by the present invention is: the existing electric energy and power collection method has the problem of being unable to effectively process the bidirectional power and electric energy data of the motor in different modes; the data accuracy is limited; the failure rate is high and it is impossible to achieve accurate collection and efficient management of the forward and reverse power and electric energy of the motor.
[0006] To solve the above technical problems, the present invention provides the following technical solutions: a method for collecting electric energy and power data, comprising collecting data through a first device; outputting power and electric energy accumulation based on real-time data; and adopting a first protocol for data storage and output.
[0007] As a preferred solution of the method for collecting electric energy and power data described in the present invention, the collecting data through the first device includes collecting data using the first device.
[0008] As a preferred solution of the method for collecting electric energy and power data described in the present invention, the collecting data through the first device includes transmitting the collected data to the system after processing.
[0009] As a preferred solution of the method for collecting electric energy and power data described in the present invention, the output of power and electric energy accumulation based on real-time data includes outputting instantaneous power and processing forward and reverse power data after the data is collected.
[0010] As a preferred solution of the method for collecting electric energy and power data described in the present invention, the output of power and accumulation of electric energy based on real-time data includes outputting electric energy according to power changes, and accumulating and storing electric energy consumption and power generation data.
[0011] As a preferred solution of the method for collecting electric energy and power data described in the present invention, wherein: the use of the first protocol for data storage and output includes transmitting the output power and electric energy data to the system through the first protocol and storing them in the system.
[0012] As a preferred solution of the method for collecting electric energy and power data described in the present invention, wherein: the use of the first protocol for data storage and output includes analyzing the stored data and generating digital tables and charts.
[0013] Another object of the present invention is to provide a collection system based on electric energy and power data, which can output power and electric energy accumulation through real-time data, thereby solving the problem of high failure rate in current electric energy and power collection.
[0014] As a preferred solution of the electric energy and power data collection system described in the present invention, it includes: an initialization module, a power and electric energy output module, and a data storage and output module; the initialization module is used to collect data; the power and electric energy output module is used to output electric energy consumption and power generation data; the data storage and output module is used to store and transmit power and electric energy data.
[0015] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of a method for collecting electric energy and power data.
[0016] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a method for collecting electric energy and power data.
[0017] Beneficial effects of the present invention: The electric energy and power data collection method provided by the present invention can better reflect the changing characteristics of the motor under dynamic load by collecting current and voltage data in real time, provide reliable data support for fault detection and energy efficiency analysis, increase the power plant's ability to control the energy consumption of the motor, and help optimize the reasonable allocation of energy. Through power and electric energy calculation, the equipment realizes the synchronous processing of forward and reverse power data, so that the power plant can fully grasp the energy consumption and power generation of the motor without the need for additional measuring devices, thereby reducing equipment maintenance costs and improving the credibility and stability of the data. Through reliable data transmission and storage, the system can monitor the power and electric energy consumption of the motor in real time under any operating conditions, support long-term data accumulation and analysis, reduce the system maintenance burden, and provide a solid foundation for subsequent optimization analysis and prediction. The present invention achieves better results in terms of efficiency, controllability and safety of energy management. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0019] Figure 1 An overall flow chart of a method for collecting electric energy and power data provided in the first embodiment of the present invention.
[0020] Figure 2 An overall flow chart of an electric energy and power data collection system provided for the third embodiment of the present invention. DETAILED DESCRIPTION
[0021] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.
[0022] Example 1, reference Figure 1 , as an embodiment of the present invention, provides a method for collecting electric energy and power data, comprising:
[0023] S1: Collect data through the first device.
[0024] Furthermore, the first device can be of multiple types, such as CT (current transformer) and PT (voltage transformer), Hall effect sensor, shunt resistor, etc. In this embodiment, real-time current and voltage data are collected from the secondary circuit of the motor through CT (current transformer) and PT (voltage transformer) to ensure that all current and voltage states of the motor in different operating modes can be covered.
[0025] It should be noted that in another feasible embodiment, the first device adopts a Hall effect sensor and a shunt resistor, including: the Hall effect sensor uses the Hall effect to detect the magnetic field generated by the current. When the current flows through the conductor, a magnetic field is generated. The Hall sensor measures the current by sensing this magnetic field and outputs a corresponding voltage signal. For voltage measurement, a voltage divider circuit can be combined or a voltage Hall sensor can be used to directly sense the voltage change. It is suitable for current measurement occasions that require high precision and fast response, such as motor drive, energy management and smart grid applications. A shunt resistor is a device that measures current by the voltage drop across a resistor. A shunt resistor of known resistance is connected in series in the circuit. When the current passes through the resistor, a small voltage drop will be generated, and the current value can be calculated according to Ohm's law. For voltage measurement, a voltage probe can be used directly. It is commonly used for low-voltage circuits, DC power supply measurements, and battery monitoring systems to measure DC current.
[0026] Furthermore, the relay protection device is used as the core, and through software optimization and hardware integration, the full acquisition of the forward and reverse power and electric energy of the motor is realized. Specifically, it includes the following parts:
[0027] Hardware composition: Based on traditional relay protection devices, including CT (current transformer) and PT (voltage transformer), used to obtain secondary current and voltage data of high-voltage motors.
[0028] Software logic: The manufacturer writes a special program to achieve two-way collection and calculation of power and energy data. The program includes a real-time monitoring module and a data transmission module to ensure the real-time and accuracy of the data.
[0029] It should be noted that the real-time current and voltage data of the high-voltage motor are collected by using the equipment in the secondary circuit of CT and PT. When the motor works as a normal motor, the reverse power data is collected; when the motor works as a generator in reverse operation, the forward power data is collected. All these data will be transmitted to the monitoring background system in real time.
[0030] S2: Output power and energy accumulation based on real-time data.
[0031] Furthermore, after collecting the real-time current I and voltage V data, the instantaneous power is calculated using the formula P=VI, and the forward and reverse power data are processed separately. After collecting the current and voltage in real time, the instantaneous power is quickly calculated using the formula P=VI, and the forward and reverse power data can be processed separately. This feature allows the system to directly measure the power output in both modes without additional hardware adjustment when the motor switches from the power consumption mode to the power generation mode. This technological breakthrough is extremely valuable for power plants because the performance monitoring of the equipment in different modes can be completed more efficiently, avoiding the delays and errors caused by hardware switching in traditional solutions. In the prior art, traditional relay protection devices cannot realize the automatic identification and processing of forward and reverse power, and this invention effectively solves this bottleneck by calculating and distinguishing real-time power. This real-time and accuracy ensures the reliability of equipment operation data, helps to optimize energy management and improve the operating efficiency of equipment.
[0032] It should be noted that according to the change of power P, the electric energy E is calculated by the formula E=Pt, and the electric energy consumption and power generation data of the hour, day, month and year are accumulated and stored. The electric energy accumulation function in the invention calculates the electric energy in real time by the formula E=Pt, and accumulates and stores it according to the time dimensions of hour, day, month and year. This method can fully reflect the energy consumption and power generation trends of the motor in long-term operation, and provide accurate basic data for the operation optimization and equipment maintenance of the power plant. For example, by analyzing the electric energy consumption in a certain period of time, abnormal equipment conditions can be discovered in time and early fault warning can be achieved. In addition, the cumulative storage method enables the power plant management to discover potential energy-saving opportunities from historical data and conduct more accurate energy efficiency management. The existing technology often relies on independent electricity meter equipment for the accumulation and analysis of electric energy data, which increases hardware and maintenance costs. The invention realizes the accurate calculation and long-term storage of energy consumption data through software algorithms, which not only reduces hardware requirements, but also improves data consistency and accuracy. This innovation significantly reduces data loss and transmission errors in traditional methods.
[0033] S3: Use the first protocol to store and output data.
[0034] Furthermore, the first protocol can be multiple, such as RS485 protocol, Modbus protocol, Profibus protocol, etc. In this embodiment, the power and electric energy data calculated are transmitted to the DCS and FECS systems through the RS485 protocol, and are reliably stored in the system to ensure the integrity and accuracy of the data.
[0035] It should be noted that in another feasible embodiment, the first protocol adopts the Modbus protocol and the Profibus protocol, including: Modbus is an application layer communication protocol, which was first designed by Modicon for PLC (Programmable Logic Controller). It is based on a master-slave architecture and can transmit data on a serial link (such as RS232, RS485) or a TCP / IP network. The Modbus protocol has two main communication modes: Modbus RTU (using serial communication) and Modbus TCP (based on Ethernet). It is widely used in factory automation, energy management, building automation, equipment monitoring and other fields. Profibus is a fieldbus protocol developed by Siemens of Germany. It is a standard industrial automation communication protocol that supports distributed control and real-time data transmission. Profibus has two main versions: Profibus DP (for device-level data transmission) and Profibus PA (for process automation). It is widely used in monitoring and data acquisition in process control, production automation, manufacturing and energy fields.
[0036] Furthermore, the data transmission process:
[0037] Acquisition phase: The current and voltage signals obtained through CT and PT are transmitted to the relay protection device.
[0038] Calculation stage: Power and electrical energy are calculated in real time through the written program.
[0039] Transmission stage: Data is transmitted to DCS (distributed control system) and FECS (power plant energy monitoring system) via RS485 protocol.
[0040] Storage stage: Store and process data in the DCS and FECS systems for subsequent equipment maintenance and energy consumption analysis.
[0041] It should be noted that the electric energy consumption and power generation data of the motor are monitored in real time in the DCS and FECS systems. The system can distinguish between forward and reverse power to achieve comprehensive status monitoring of the equipment. The output is in the form of digital tables and charts, which is convenient for technicians to analyze and judge the operating status of the equipment. In the daily operation and maintenance of the power plant, when the motor is in normal working mode, the system collects the reverse electric energy and power it consumes in real time, accumulates and stores them. When the motor switches to the power generation mode, the system can collect and record the forward power and electric energy data in real time without changing the hardware equipment, and provide power generation monitoring information. Through the data of this system, the power plant can better optimize the power consumption and power generation mode and improve the energy efficiency utilization of the equipment.
[0042] Forward power usually refers to the electrical energy output when the motor is used as a generator; reverse power refers to the electrical energy consumed by the motor as a load. In this invention, the importance of this explanation lies in solving the data collection problem when the motor is running in dual mode. By distinguishing between forward and reverse power, the present invention can accurately monitor the energy consumption of the device in consumption and generation modes, ensuring the system's comprehensive control of energy flow.
[0043] The present invention collects the real-time current and voltage data of the motor using a relay protection device to collect secondary current and voltage data. This method has the characteristics of strong real-time performance and accurate data. Unlike the prior art, the device can process bidirectional power signals simultaneously without the need for additional hardware devices. Through this design, the timeliness of the data can be significantly improved, ensuring that the operating characteristics of the equipment under different working conditions can be accurately recorded. This high-precision data acquisition provides a reliable data basis for subsequent calculations, effectively avoiding data error problems caused by hardware limitations.
[0044] Based on the collected data, power and electric energy are calculated. In this step, the invention adopts standard power and electric energy calculation formulas to ensure the accuracy of data processing. Through the program logic written by the manufacturer, the system can process forward and reverse power in real time, thereby comprehensively monitoring the energy consumption and power generation behavior of the motor. This innovation optimizes the calculation logic so that under multi-mode conditions, the system can accurately calculate energy consumption and power generation without additional measuring devices. This method significantly reduces the maintenance cost of the equipment, while improving the stability of the system and ensuring the accuracy of energy data.
[0045] Based on the calculated data, it is transmitted to the monitoring background, and the data is transmitted to the DCS and FECS systems through the high-speed RS485 protocol to ensure the speed and reliability of data transmission. This transmission method has the characteristics of strong anti-interference and high data integrity, and is particularly suitable for complex industrial environments. Through this stable data transmission method, the present invention can realize real-time monitoring of the operating status of the power plant and provide data support for energy optimization. This design improves the system response speed, reduces data loss during transmission, and ensures that the operation and maintenance decisions of the power plant are more scientific and effective.
[0046] Example 2, an embodiment of the present invention, provides a method for collecting electric energy and power data. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.
[0047] First, in order to verify the accuracy and superiority of the invention in different motor operation modes, three high-voltage motors of different models (named Motor A, Motor B and Motor C) were selected, and data collection was carried out in two modes: standard operation mode and power generation mode. The main equipment of the experiment includes the improved relay protection device, CT and PT sensors, and DCS and FECS systems for data transmission and monitoring.
[0048] Before the experiment began, all equipment was calibrated in accordance with the manufacturer's technical specifications to ensure the accuracy of data collection. First, Motor A was selected to run in standard operation mode, and the secondary data of current and voltage were collected using the relay protection device. The real-time data in the experiment was transmitted to the DCS system via the RS485 communication protocol to record its instantaneous power and cumulative energy consumption. Under the same environment, Motor A switched to power generation mode. At this time, no additional hardware adjustment was required, and the relay protection device directly collected the forward power and energy generation data.
[0049] The same test was performed on Motor B and Motor C, and various parameters were recorded in standard and power generation modes. All data were statistically analyzed in the DCS and FECS systems to verify the performance of the invention in different motors and modes. The transmission accuracy of the data was also recorded through the feedback signal of the DCS.
[0050]
[0051] In the power generation mode, traditional equipment cannot accurately monitor the generation of reverse power and electric energy. The present invention can realize accurate forward and reverse energy data collection in different modes of high-voltage motor operation through the optimization of proprietary software algorithms and relay protection devices. The data in the table shows that the power generation of motor B in the power generation mode is 10.0kWh.
[0052] The experimental data show that the invention can complete data collection and monitoring without adding additional hardware. This feature not only reduces the installation and maintenance costs, but also reduces the complexity of the system and improves the stability of long-term operation. The data collection and transmission in the experiment are completed on the basis of the original hardware, which reflects the simplicity and effectiveness of the solution.
[0053] From the transmission accuracy data in the table, it can be seen that the transmission stability of the present invention under different environments is higher than 99.4%. Compared with the traditional multi-function electricity meter, the present invention effectively reduces transmission delay and data loss during data transmission, ensures data integrity, and provides more reliable technical support for the intelligent operation and maintenance of power plants.
[0054] In summary, this embodiment demonstrates the innovation and superiority of the invention in real-time energy monitoring and data transmission through detailed data display and analysis. This solution not only makes effective improvements on the basis of existing technologies, but also demonstrates high reliability and accuracy, which helps to improve the overall operation and maintenance efficiency of power plants.
[0055] Example 3, reference Figure 2 , is an embodiment of the present invention, and provides a collection system based on electric energy and power data, including an initialization module, a power and electric energy output module, and a data storage and output module.
[0056] The initialization module is used to collect data, the power and electric energy output module is used to output electric energy consumption and power generation data, and the data storage and output module is used to store and transmit power and electric energy data.
[0057] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.
[0058] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.
[0059] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.
[0060] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc. It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limited. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.
[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.
Claims
1. A method for collecting electric energy and power data, characterized in that: include: Collecting data through a first device; Output power and energy accumulation based on real-time data; The first protocol is adopted for data storage and output.
2. The method for collecting electric energy and power data according to claim 1, characterized in that: The collecting data through the first device includes collecting data using the first device.
3. The method for collecting electric energy and power data according to claim 2, characterized in that: The collecting of data by the first device includes transmitting the collected data to the system after processing.
4. The method for collecting electric energy and power data according to claim 3, characterized in that: The output power and electric energy accumulation based on real-time data includes outputting instantaneous power and processing forward and reverse power data after the data is collected.
5. The method for collecting electric energy and power data according to claim 4, characterized in that: The output power and electric energy accumulation based on real-time data includes outputting electric energy according to power changes, and accumulating and storing electric energy consumption and power generation data.
6. The method for collecting electric energy and power data according to claim 5, characterized in that: The adopting the first protocol to store and output data includes transmitting the output power and electric energy data to the system through the first protocol and storing them in the system.
7. The method for collecting electric energy and power data according to claim 6, characterized in that: The data storage and output using the first protocol includes analyzing the stored data and generating digital tables and charts.
8. A system using the method for collecting electric energy and power data according to any one of claims 1 to 7, characterized in that: It includes initialization module, power and electric energy output module, data storage and output module; The initialization module is used to collect data; The power and electric energy output module is used to output electric energy consumption and power generation data; The data storage and output module is used to store and transmit power and electric energy data.
9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for collecting electric energy and power data according to any one of claims 1 to 7 are implemented.
10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for collecting electric energy and power data according to any one of claims 1 to 7 are implemented.