CN111930055B - Comprehensive energy sensing device with optimized control - Google Patents
Comprehensive energy sensing device with optimized control Download PDFInfo
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- CN111930055B CN111930055B CN202011046149.5A CN202011046149A CN111930055B CN 111930055 B CN111930055 B CN 111930055B CN 202011046149 A CN202011046149 A CN 202011046149A CN 111930055 B CN111930055 B CN 111930055B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
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Abstract
The invention relates to a comprehensive energy sensing device with optimized control, which is mainly technically characterized in that: the electric boiler energy conversion system comprises a main control unit, wherein the main control unit acquires electric parameters, water inlet flow, water outlet flow, pressure and temperature data of an electric boiler through a plurality of input interfaces, calculates the energy conversion efficiency of the electric boiler in real time, compares the electric power predicted by an optimization model algorithm with the electric power operated in real time to obtain a control command for adjusting the operation parameters of the electric boiler, and sends the control command to optimize and control the operation of the electric boiler through an output interface. The invention has reasonable design, can simultaneously acquire the operation parameters of the electric boiler, analyze and process the operation parameters of the electric boiler and adjust the operation parameters of the electric boiler, finally achieves the aim of comprehensive energy management, realizes the optimized control function of the electric boiler, simplifies the on-site installation and debugging difficulty and the operation reliability, reduces the cost and can be widely used for the automatic control of the electric boiler.
Description
Technical Field
The invention belongs to the technical field of computer automatic control, and particularly relates to a comprehensive energy sensing device with optimized control.
Background
In a traditional energy monitoring system, water, electricity, gas, heat, cold, oil and other energy sources are respectively used for completing data acquisition and uploading to a main station platform through various acquisition terminals. For example, when the operation state of the electric boiler is monitored, the intelligent electric meter for monitoring electric parameters is needed, the flow of water in a water inlet pipe needs to be monitored, the pressure, the temperature and other monitoring meters and corresponding data acquisition terminals need to be monitored, the flow of water in a water outlet pipe (water outlet of a direct hot water pipe and water outlet of a heat storage water pipe) needs to be monitored, the pressure, the temperature and other monitoring meters and corresponding data acquisition terminals need to be monitored, the data acquisition scheme and the time are configured by each data acquisition terminal, the data acquisition moments of several terminals are difficult to synchronize, the operation state of the electric boiler is difficult to judge on site by a single data acquisition terminal, and the energy conversion.
Through searching, the existing documents are found to generally monitor only partial equipment states, such as: patent document "an electric boiler heating control system (patent publication No. CN 206593202U)" is provided with a plurality of temperature sensors and water level meters to collect water temperature and water level in an electric boiler in real time and perform heating control, but it cannot monitor flow, pressure and electric parameters of water inlet and outlet pipes, and therefore cannot accurately determine the operation state of the electric boiler, and it is difficult to realize an optimal control function for the electric boiler.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a comprehensive energy sensing device with optimized control, which can simultaneously acquire electric parameters, water inlet flow, water outlet flow, pressure and temperature of an electric boiler, calculate the conversion efficiency of comprehensive energy in real time and realize the optimized control function of the electric boiler.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the utility model provides a take comprehensive energy perception device of optimal control, includes the main control unit, the main control unit gathers electric boiler's electric parameter, inflow flow, water outlet flow, pressure and temperature data through multichannel input interface, calculates electric boiler energy conversion efficiency and compares according to the electric power of real-time operation and the electric power that the optimization model algorithm forecasted out, obtains the control command of adjusting electric boiler operational parameter to send the operation of control command optimal control electric boiler through output interface.
And the main control unit is also connected with an extension unit through an RS485 interface or an Ethernet interface, and the extension unit acquires the water inlet flow, the water outlet flow, the pressure and the temperature of the electric boiler, performs data interaction with the main control unit and coordinates and controls the operation of the electric boiler.
Also, the main control unit includes: the system comprises an information acquisition and processing module, a metering module, an input/output expansion module, a man-machine interface, a communication interface and a main control unit power supply module;
the information acquisition and processing module comprises: the main processor is connected with a real-time clock circuit with temperature compensation, a storage chip for storing user data, a high-capacity TF card storage interface circuit for storing wave recording data, a ferroelectric memory for storing electric energy and parameters and a network expansion and interface circuit;
the metering module adopts a current type voltage transformer, a straight-through current transformer, a signal conversion and conditioning circuit and a metering chip to realize the functions of sampling voltage and current and calculating related parameters of electric energy metering, and the metering module collects data and transmits the data to the information acquisition and processing module;
the input/output expansion module comprises a slave processor, a state quantity input/output unit, a direct current analog quantity input unit and a relay output unit, wherein the slave processor is connected with the master controller, the state quantity input/output unit, the direct current analog quantity input unit and the relay output unit, and the state quantity input/output unit, the direct current analog quantity input unit and the relay output unit are connected with the electric boiler;
the communication interface is connected with an external device for receiving electric power predicted by the optimization model algorithm.
And isolators are connected between the information acquisition and processing module and the communication interface and between the information acquisition and processing module and the input/output expansion module.
Moreover, the metering chip adopts a three-phase electric energy metering chip RN8302 or ATT 7022E.
Moreover, the metering module collects the electricity consumption of one three-phase three-wire or three-phase four-wire; the state quantity input and output unit comprises two input interfaces and two output interfaces, the direct current analog quantity input unit comprises two input interfaces, and the relay output unit comprises one relay output interface; the communication interface comprises two paths of high-speed RS485 and two paths of Ethernet interfaces.
And the main control unit power module adopts a power conversion module for supplying power to a single-phase 220V alternating current and direct current power supply, and converts the power into a 5VDC power supply for the information processing module, a 12VDC power supply for RS485 communication and a 12VDC power supply for the input/output expansion module, and the power supplies are mutually isolated.
Furthermore, the man-machine interface comprises a liquid crystal display screen with the resolution of 128 x 64 pixels, four solid keys and a plurality of LED lamps only used for status display.
Further, the extension unit includes: the system comprises a data acquisition and processing module, an input/output expansion module, a man-machine interface, a communication interface and an expansion unit power supply module; the data acquisition and processing module is connected with the input/output expansion module, the man-machine interface, the communication interface and the expansion unit power supply module;
the data acquisition and processing module comprises a processor, a real-time clock circuit with temperature compensation, a 32MB memory for storing user data, a ferroelectric memory for storing real-time energy accumulation and parameters and a communication interface circuit, wherein the real-time clock circuit is connected with the processor;
the communication interface is connected with an external device for receiving electric power predicted by the optimization model algorithm.
Further, the input-output expansion module includes: 4 digital input interfaces, 4 digital output interfaces and 4 relay control output interfaces; the communication interface comprises a 1-path RS485 interface, a 1-path Ethernet interface, a 1-path LoRa communication module and a 1-path 4G/5G communication module, and the LoRa communication module and the 4G/5G communication module are of a pluggable structure.
The invention has the advantages and positive effects that:
1. the invention can simultaneously collect the electric parameters, water inlet flow, water outlet flow, pressure and temperature of the electric boiler, can calculate the energy conversion efficiency of the electric boiler in real time and compare the electric power operated in real time with the electric power predicted by the optimization model algorithm, and can output a control command to adjust the operation parameters of the electric boiler to change the electric power operated in real time of the electric boiler if the difference value exceeds a preset threshold value, thereby finally achieving the aim of comprehensive energy management and realizing the optimization control function of the electric boiler.
2. The invention has high integration level, can realize real-time monitoring, analysis and optimized control of various forms of energy sources by a single set of device, simplifies the on-site installation and debugging difficulty and the operation reliability, and can reduce the cost.
3. The invention adopts a modular design, and can independently complete basic functions by using the main control unit, thereby further reducing the cost and the installation space for certain comprehensive energy application scenes; meanwhile, on the basis of meeting basic functions, other functions which need to be selected according to different application occasions are designed on an expansion unit which can be operated independently, the size and the cost of single equipment are further reduced, and the complexity of structural design of the equipment is also reduced.
4. The invention can be freely selected to be completed by the main control unit or the expansion unit according to the requirement, thereby improving the application adaptability.
5. The invention adopts a high-performance Cortex M7 processor, utilizes the large-capacity on-chip SRAM and high-precision ADC thereof, realizes the basic functions of whole data acquisition, information processing, protocol conversion and the like, and can also realize wave recording of the alternating current signals of 6 channels, thereby further reducing the cost of the whole application and the difficulty of the design.
6. The main control unit and the expansion unit can both communicate with the external equipment through the Ethernet, and can also realize the communication function with the external equipment through any one of the main control unit and the expansion unit, receive electric power and control threshold parameters predicted by an optimization model algorithm in the external equipment, and the expansion unit is provided with a plurality of pluggable communication modules to realize the optional function of various communication modes with the external equipment.
Drawings
FIG. 1 is a block diagram of the circuit of the present invention;
FIG. 2 is a block diagram of the power consumption information acquisition and control module (master control unit) of the present invention;
fig. 3 is a circuit block diagram of a communication interface and a function expansion module (expansion unit) of the present invention;
fig. 4 is a flow chart of the operation of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A comprehensive energy sensing device with optimized control is shown in figure 1 and comprises a power utilization information acquisition and control module (a main control unit) and a communication interface and function expansion module (an expansion unit), wherein the power utilization information acquisition and control module (the main control unit) is connected with the communication interface and function expansion module (the expansion unit). The main control unit and the expansion unit collect electric parameters, water inlet flow, water outlet flow, pressure and temperature of the electric boiler through the input interface, calculate the energy conversion efficiency of the electric boiler in real time, compare the electric power operated in real time with the electric power predicted according to the optimization model algorithm, and if the difference value exceeds a preset threshold value, output control commands through the output interface to adjust the operation parameters of the electric boiler, so that the electric power operated in real time of the electric boiler is changed, the aim of comprehensive energy management is finally achieved, and the optimization control function of the electric boiler is realized.
In the present embodiment, the electric power predicted by the optimization model algorithm is obtained by communicating with the external device and stored in the main control unit or the extension unit. The power utilization information acquisition and control module (main control unit) and the communication interface and function expansion module (expansion unit) are selectively connected with the outside to obtain electric power and control threshold parameters predicted by the optimization model algorithm. The optimization control model algorithm in the external equipment is continuously realized by upgrading by adopting a conventional design method, and the control threshold parameter is also obtained by summarizing and summarizing actual measurement.
These are described below:
1. the power consumption information acquisition and control module (main control unit) basically comprises all functions and external interfaces of the comprehensive energy sensing device, can meet most application scenes without control functions, and has the main functions of: the device has the functions of measuring power consumption information of one path of three-phase three-wire or three-phase four-wire (including power measurement and optional fault recording functions), 2 paths of direct current analog quantity input, 2 paths of digital quantity output interfaces, 1 path of relay control output, 2 paths of high-speed RS485 interfaces and 2 paths of Ethernet interfaces.
The communication interface and function expansion module (expansion unit) is used as the expansion of the main control unit in external communication and input/output interfaces, and has the main functions of: the system comprises a 1-path Ethernet interface, a 1-path high-speed RS485 interface, 4-path direct current analog quantity input, 4-path digital quantity input, a 4-path digital quantity output interface, and 4-path relay control output, and simultaneously, a 4G/5G communication module and a selectable LoRa communication module can be selected.
The high-speed RS485 interface can be selected between the main control unit and the expansion unit according to requirements, and the Ethernet interface can also be selected to realize the high-speed data communication between the main control unit and the expansion unit.
2. Power consumption information acquisition and control unit (Main control unit)
As shown in fig. 2, the electricity consumption information collecting and controlling unit (main control unit) adopts a modular design and is divided into the following modules according to functions: the system comprises a metering module 1, an input/output expansion module 2, an information acquisition and processing module 3, a man-machine interface 4, a communication interface 5 and a main control unit power supply module 6.
The main control unit can analyze and process all the collected data, so that the electric parameters, water inlet flow, water outlet flow, pressure and temperature of the electric boiler can be collected at the same time, the energy conversion efficiency of the electric boiler can be calculated in real time, the electric power running in real time can be compared with the electric power predicted by the optimization model algorithm, and if the difference value exceeds a threshold value, a control command can be output to adjust the running parameters of the electric boiler to change the electric power running in real time of the electric boiler.
2.1, the information acquisition and processing module
The information acquisition and processing module is the core part of main control unit, and the essential element includes: the device comprises a high-performance processor (main processor), a real-time clock circuit (RTC) with temperature compensation, a 32MB Flash memory for user data storage, a large-capacity TF card storage interface circuit for wave recording data storage, a ferroelectric memory (FRAM) for electric energy and parameter storage, and a network expansion and interface circuit, wherein the RTC is connected with the high-performance processor (main processor). All other functional modules of the main control unit complete the acquisition, input and output functions of electric energy, non-electric energy and state quantity under the control of the main control unit, and analyze, calculate, process, store and communicate with external equipment for all data.
The main processor adopts a high-performance Cortex M7 processor STM32H743, the processor is based on a 32-bit Cortex-M7 kernel, a double-precision FPU and an L1 cache are built in, the highest working main frequency reaches 400MHz, a FLASH storage space of 2MB at the maximum is stored in the processor, and an SRAM storage space of 1MB at the maximum is stored in the processor; abundant peripherals are provided with resources such as 16-bit high-speed ADC with built-in multiple channels, up to 168 general IO interfaces, 4-way USART communication interfaces, 4-way UART communication interfaces, 6-way SPI interfaces, 2 xSD/SDIO/MMC interfaces, 4-way DMA controllers, up to 22 timers and the like.
The real-time clock chip adopts a special clock chip RS8025T with a temperature compensation function, the clock error of one day is not more than 0.5 second, and the accuracy of electric energy metering and optimal control is ensured.
According to the technical requirements of fault recording, at least more than 20-50 cycles before and after a fault are required to be recorded (6 channels are sampled at a sampling rate of 12.8K according to 16-bit resolution, and the data is about 150KB in 1 second), the RAM space of the processor is up to 1MB, and the processor provides greater convenience for realizing longer recording time besides meeting the functions of a real-time operating system, network communication and basic signal recording; the FLASH storage space of 2MB in the chip ensures that the application program can be realized without extending FLASH. In order to meet the requirements of user data storage space and recording data storage, a 32MB nor Flash is expanded to store user data, and a TF card not lower than 32GB is expanded to store recording data. A piece of 2KB ferroelectric memory is used for electric energy data and related parameters.
In order to ensure the safety of the system, the information acquisition and processing module and all external interfaces realize isolation of more than AC 2000V: the connection between the optical coupling and the communication interface, the input/output extension module and the like is isolated by adopting an optical coupling or ADUM series isolation chip, and high-speed communication is realized under the condition of ensuring that the isolation voltage is improved.
Because the STM32H743 processor only has one Ethernet interface inside, in order to realize the function of two network ports, a switch chip KSZ8863 is adopted to realize the function of a double-port network, so that the requirement of 2 network interfaces in the debugging and application process is facilitated.
2.2 metering Module
The metering module realizes a voltage and current sampling function, wherein a voltage signal converts a large voltage into a small voltage through a current type voltage transformer, namely the input large voltage is limited to about 1mA through a precision resistor with the temperature drift of not higher than 25ppm and then input to the secondary side of the voltage transformer, and the secondary side adopts the precision resistor with the temperature drift of not higher than 20ppm for sampling into the small voltage; the current sampling adopts a 0.1-level straight-through current transformer to sample the input large current by matching with a precision resistor with 0.1% temperature drift not higher than 20 ppm. Converting large voltage and large current into voltage signals not higher than 900mV, sending the voltage signals into a special three-phase metering chip (such as RN8302 or ATT 7022E) for sampling operation, realizing the acquisition of electric energy metering and other electric parameters, and finally uploading the voltage signals to a processor for processing and storage through an SPI interface isolated by an optical coupler.
Because the ADC of the main processor can only collect signals above 0V, the module also carries out signal bias and amplification on input alternating current voltage signals through a signal conditioning circuit parallel to the metering chip, conditions the input alternating current signals into direct current signals between 0 and 2.5V, and then connects the direct current signals into an ADC channel of the processor for sampling so as to realize the wave recording function of the alternating current sampling signals.
2.3 the input/output expansion module
The input/output expansion module comprises a slave processor, a state quantity input/output unit, a direct current analog quantity input unit and a relay output unit, wherein the state quantity input/output unit, the direct current analog quantity input unit and the relay output unit are connected with the slave processor, the state quantity input/output unit provides two state quantity input interfaces and two state quantity output interfaces and can be respectively connected with two state quantity input signals (2 DI) and two state output signals (2 DO), the direct current analog quantity input unit provides two analog quantity input interfaces and can be connected with two analog quantity input signals (2 AI), and the relay output unit provides one relay output control interface and can output one relay control signal (1 YK). The input/output expansion module adopts a slave processor to independently complete DI/DO and AI functions, and the functions of the I/O expansion module and the I/O expansion module are self-formed into a small system and are relatively independent, so that support is provided for ensuring the operational reliability and the expansion convenience of an input/output interface. In order to simplify the design and reduce the cost, the slave processor adopts a processor with a core of Cortex M0, the processor is provided with an ADC (analog-to-digital converter), the acquisition of a plurality of paths of direct current analog signals is completed through a built-in multi-channel ADC, and the input and output control of a plurality of paths of DI/DO (digital input/output) is completed through a universal IO (input/output) port of the processor.
The communication between the input/output extension module and the main processor adopts a UART communication interface with optical coupling isolation to ensure the reliability of the acquisition unit.
2.4 human-machine interface
The LED display screen mainly comprises a liquid crystal display screen with the resolution of 128 x 64 pixels, four solid keys and a plurality of LED lamps only used for state display.
The liquid crystal display screen is used for displaying the real-time data of the current running electric and non-parameters, setting parameters and other running states and the like.
Adopt SPI communication interface between liquid crystal display and the host processor, gather and control through general IO mouth between button and LED and the host processor, they both cooperate and can realize looking over and setting up some operation parameters at the scene.
2.5 communication interface
The device mainly comprises two RS485 interfaces (an RS485 interface 1 and an RS485 interface 2 in a figure 2) which are isolated by ADUM series isolators and two Ethernet interfaces (an Ethernet interface 1 and an Ethernet interface 2 in a figure 2), and the reliability between two devices is ensured while high-speed communication is realized.
2.6 Main control Unit Power Module
The power supply conversion module capable of supplying power by using a single-phase 220V alternating current and direct current power supply is adopted to convert an external 220V alternating current power supply into a 5VDC power supply for one path of information processing module, a 12VDC power supply for one path of 485 communication and a 12VDC power supply for one path of input and output expansion module, which are mutually isolated, so that the isolation requirements among different modules are realized.
The function extension unit 7 in fig. 2 is an extension of the main control unit in terms of functions and structure, and in order to enhance the application adaptability, this module is designed as a single external device, and is implemented in the form of a communication interface and a function extension module.
3. Communication interface and function expansion module (expansion unit)
The expansion unit is similar to the input and output expansion module of the main control unit in functional module, and is used for meeting the requirement of communication between the expansion unit and the main control unit as well as the whole energy sensing terminal and external equipment. The expansion unit realizes data interaction with the main control unit through a high-speed RS485 interface or an Ethernet interface, and simultaneously communicates with external equipment through a self-contained 4G/5G module. All control functions of the optimization control function of the comprehensive energy sensing terminal are realized by completely collecting all data of the comprehensive energy sensing terminal. The device has an optimization control model algorithm operation mode, can download the corresponding equipment optimization control algorithm according to an application scene, and can execute optimization adjustment according to the optimization algorithm in real-time operation.
The communication interface and function extension module (extension unit) includes the following interfaces: 1 way RS485 interface, 1 way ethernet interface, 4 way digital input interface (DI), 4 way digital output interface (DO), the control output interface of 4 way relay contact output, simultaneously for being suitable for different communication demands, 1 way optional LoRa communication module, 1 way optional 4G/5G communication module have been expanded again, and they adopt pluggable structural design, can select different communication modules according to the applied scene of difference.
In the aspect of processor model selection, the expansion unit is also designed by adopting the STM32H743 to realize all functions, but a metering module and a liquid crystal display screen are not reserved, and a larger number of interfaces are added on the basis of an input/output expansion module. The above functions are directly realized by the CPU, and the whole design method is similar to that of the main control unit.
The communication interface and function extension module (extension unit) includes the following functional modules: a data acquisition and processing module 703, an input/output expansion module 701, an expansion unit power supply module 702, a human-computer interface 704 and a communication interface 705.
The data acquisition and processing module in the communication interface and function extension module (extension unit) is the core part of the unit, and the main components comprise: a high performance processor (host processor), a real time clock circuit (RTC) with temperature compensation, a 32MB Flash memory for user data storage, a ferroelectric memory (FRAM) for storing the accumulated amount of timely-used energy and parameters, and a network expansion and interface circuit. All other functional modules of the expansion unit complete the functions of acquisition, input and output of non-electric energy and state quantity under the control of the module, and perform the functions of analysis, operation processing, storage and communication with external equipment on all data. The unit can collect all data collected by the main control unit for analysis and processing, so that the electric parameters, water inlet flow, water outlet flow, pressure and temperature of the electric boiler can be collected at the same time, the energy conversion efficiency of the electric boiler is calculated in real time, the electric power which runs in real time is compared with the electric power which is predicted by the optimization model algorithm, and a control command can be output to adjust the running parameters of the electric boiler to change the electric power which runs in real time of the electric boiler when the difference threshold value is exceeded.
Example 1:
the function of the complete energy sensing device is realized by adopting 1 power consumption information acquisition and control unit (main control unit) and 1 communication and extension unit (extension unit), the two unit modules adopt the same 220V alternating current or direct current power supply for power supply, at the moment, the main control unit and the extension unit can carry out high-speed data interaction through a high-speed RS485 interface or an Ethernet interface, the final analysis and processing of the power consumption information are completed in the extension unit, and the sensing device can carry out optimization adjustment according to an optimization algorithm through the optimization control algorithm of corresponding equipment of an actual application scene in real-time operation.
The information acquisition and processing module of the main control unit and the data acquisition and processing module of the expansion unit are designed by adopting the same CPU, and the same CPU and the data acquisition and processing module are provided with the same following modules: a piece of high performance processor (host processor) STM32H743, a real time clock circuit with temperature compensation RS8025T, a 32MB Flash memory for user data storage S25FL 256. But they are different in that 1 is the main control unit also includes a SD/MMC card memory interface circuit that can insert a mass storage TF card to support the storage of the recording data, and the extension unit does not need this function; the 2 is that the main control unit needs to expand two paths of Ethernet interfaces, a switch chip KSZ8863 is used for network expansion, and the expansion unit only needs one path of Ethernet interface, so the KSZ8041 is used for network PHY expansion.
The main control unit is also provided with an alternating current sampling circuit, namely a metering module, and a metering chip of the metering module adopts a three-phase electric energy metering special chip RN8302 to realize the acquisition of electric energy signals converted and input by the voltage current transformer. Meanwhile, in order to realize the fault function, the alternating voltage signal with the maximum amplitude less than 0.9V converted by the mutual inductor is conditioned and amplified to be a direct current signal within 0-3.3V in the module so as to adapt to the ADC input range of the main CPU.
The main control unit is also provided with a path of state quantity input and output expansion module, a Cortex M0 processor STM32F030 is adopted, and the collection functions of DIDO and direct current analog quantity are realized through a built-in 12-bit ADC and a general IO interface.
The main control unit and the extension units work according to configured functions after being electrified, namely the main control unit mainly collects and calculates related electric parameters such as voltage, current, power and electric energy, meanwhile, one extension unit is also used, the main control unit can collect and calculate non-electric energy or state quantity such as signals of opening and closing of a metering door, detection of an opening contact and a closing contact of a contactor, temperature, humidity, pressure, flow and the like through an input-output extension module, the DI or AI signal is used for collecting and calculating information of the related non-electric energy and the state quantity, and then data of the main control unit and the extension units are concentrated on the extension module through a high-speed RS485 interface or an Ethernet to obtain information of energy in all forms at present. The main control unit calculates the energy conversion efficiency of the electric boiler in real time, compares the electric power operated in real time with the electric power predicted by the optimization model algorithm to obtain a control command for adjusting the operation parameters of the electric boiler, and sends the control command to optimize and control the operation of the electric boiler through the output interface.
As shown in fig. 4, the working process of the present invention is as follows:
(1) after the comprehensive energy sensing device with the optimization control is electrified, hardware is initialized, parameters are initialized and a real-time task is started;
(2) performing electric energy information acquisition, other non-electric energy information acquisition, water inlet and outlet amount acquisition, pressure and temperature and other flag related information acquisition, and calculating various energy conversion efficiencies;
(3) the main control unit reads electric power and control parameters thereof predicted by the optimization model algorithm;
(4) calculating and optimizing various energy control parameters;
(5) and (3) if the control condition is not met, returning to the step (2), and if the control condition is met, controlling the output of various energy consumption through the control module and returning to the step (2).
Example 2
Still referring to FIG. 1, at this point, however, no expansion unit is configured, leaving only the master unit.
At the moment, the main control unit acquires and operates the relevant parameters of the electric energy according to the configured functions to obtain the relevant electric parameters such as voltage, current, power, electric energy and the like, and simultaneously acquires and operates other non-electric energy or state quantity such as signals of opening and closing of a metering door, detection of an opening contact and a closing contact of a contactor, temperature, humidity, pressure, flow and the like through DI or AI signals so as to obtain the relevant non-electric energy and state quantity information. The main control unit calculates the energy conversion efficiency of the electric boiler in real time, compares the electric power operated in real time with the electric power predicted by the optimization model algorithm to obtain a control command for adjusting the operation parameters of the electric boiler, and sends the control command to optimize and control the operation of the electric boiler through the output interface.
However, at this time, only one control mode can be output because the main control unit only controls the output relay.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also includes other embodiments that can be derived from the technical solutions of the present invention by those skilled in the art.
Claims (10)
1. The utility model provides a take optimal control's comprehensive energy perception device which characterized in that: the system comprises a main control unit and an expansion unit, wherein the main control unit uniformly collects electric parameters and thermal parameter data of an electric boiler through a plurality of input interfaces, the thermal parameters comprise water inlet flow, water outlet flow, pressure and temperature, the energy conversion efficiency of the electric boiler is locally calculated in real time and compared with electric power calculated by an optimization model algorithm according to the electric power operated in real time to obtain a control command for adjusting the operation parameters of the electric boiler, and the control command is sent out through an output interface to optimize and control the operation of the electric boiler; the expansion unit collects the water inlet flow, the water outlet flow, the pressure and the temperature of the tail end of a user, performs data interaction with the main control unit and coordinates and controls the operation of the electric boiler;
the main control unit includes: the system comprises an information acquisition and processing module, a metering module, an input/output expansion module and a main control unit power supply module;
the information acquisition and processing module comprises: the main processor is connected with a real-time clock circuit with temperature compensation, a storage chip for storing user data, a high-capacity TF card storage interface circuit for storing wave recording data, a ferroelectric memory for storing electric energy and parameters and a network expansion and interface circuit;
the metering module adopts a current type voltage transformer, a straight-through current transformer, a signal conversion and conditioning circuit and a metering chip to realize the functions of sampling voltage and current and calculating related parameters of electric energy metering, and the metering module collects data and transmits the data to the information acquisition and processing module;
the input/output expansion module comprises a slave processor, a state quantity input/output unit, a direct current analog quantity input unit and a relay output unit, wherein the slave processor is connected with the master controller, the state quantity input/output unit, the direct current analog quantity input unit and the relay output unit, and the state quantity input/output unit, the direct current analog quantity input unit and the relay output unit are connected with the electric boiler;
the extension unit includes: the system comprises a data acquisition and processing module, an input/output expansion module and an expansion unit power supply module; the data acquisition and processing module is connected with the input/output expansion module and the expansion unit power supply module;
the data acquisition and processing module comprises a processor, a real-time clock circuit with temperature compensation, a memory for storing user data, a ferroelectric memory for storing real-time energy accumulation and parameters and a communication interface circuit, wherein the real-time clock circuit is connected with the processor.
2. The integrated energy sensing device with optimized control as claimed in claim 1, wherein: and the main control unit is connected with the expansion unit through an RS485 interface or an Ethernet interface.
3. The integrated energy sensing device with optimized control as claimed in claim 1 or 2, wherein: the main control unit further comprises: a human-machine interface and a communication interface; the human-computer interface and the communication interface are connected with the information acquisition and processing module of the main control unit, and the communication interface is connected with external equipment and used for receiving electric power predicted by the optimization model algorithm.
4. The integrated energy sensing device with optimized control as claimed in claim 3, wherein: isolators are connected between the information acquisition and processing module and the communication interface and between the information acquisition and processing module and the input/output expansion module.
5. The integrated energy sensing device with optimized control as claimed in claim 3, wherein: the metering chip adopts a three-phase electric energy metering chip RN8302 or ATT 7022E.
6. The integrated energy sensing device with optimized control as claimed in claim 3, wherein: the metering module collects the electricity consumption of one three-phase three-wire or three-phase four-wire; the state quantity input and output unit comprises two input interfaces and two output interfaces, the direct current analog quantity input unit comprises two input interfaces, and the relay output unit comprises one relay output interface; the communication interface comprises two paths of high-speed RS485 and two paths of Ethernet interfaces.
7. The integrated energy sensing device with optimized control as claimed in claim 3, wherein: the main control unit power module adopts a power conversion module powered by a single-phase 220V alternating current and direct current power supply to convert the power into a 5VDC power supply for one path of information processing module, a 12VDC power supply for one path of RS485 communication and a 12VDC power supply for one path of input/output expansion module, and the power supplies are mutually isolated.
8. The integrated energy sensing device with optimized control as claimed in claim 3, wherein: the man-machine interface comprises a liquid crystal display screen with the resolution of 128 x 64 pixels, four solid keys and a plurality of LED lamps only used for status display.
9. The integrated energy sensing device with optimized control as claimed in claim 2, wherein: the extension unit further includes: a human-machine interface and a communication interface; the human-computer interface and the communication interface are connected with the data acquisition and processing module of the expansion unit; the communication interface is connected with an external device for receiving electric power predicted by the optimization model algorithm.
10. The integrated energy sensing device with optimized control as claimed in claim 9, wherein: the input-output expansion module includes: 4 digital input interfaces, 4 digital output interfaces and 4 relay control output interfaces; the communication interface comprises a 1-path RS485 interface, a 1-path Ethernet interface, a 1-path LoRa communication module and a 1-path 4G/5G communication module, and the LoRa communication module and the 4G/5G communication module are of a pluggable structure.
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| CN115046315A (en) * | 2022-06-24 | 2022-09-13 | 国网安徽省电力有限公司淮北供电公司 | Control system and control method of heat accumulating type electric boiler |
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