[0097] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0098] The structure of the central air conditioning load control system for commercial buildings that interacts with the power grid provided by the present invention is as follows figure 1 Shown, including:
[0099] Data acquisition device 2: Used to receive commercial building data and load control data, and convert the internal data format and storage of the cost method.
[0100] Controllable load calculation device 3: Use commercial building data to calculate online the adjustable load capacity of central air-conditioning in commercial buildings, and send the calculation results to the grid side.
[0101] Control strategy generation device 4: Obtain the load control data on the grid side from the data acquisition device, combine real-time commercial building data, match the strategy plan expert library, and obtain the recommended control strategy based on the load reduction data and current air-conditioning operating parameters. Analyze and generate control strategies for central air conditioning in commercial buildings.
[0102] Strategy plan expert library 5: Store the control strategy plan of commercial building central air conditioning under various load control capacities, and automatically give recommended control strategies that meet the load control capacity according to the current air conditioning operating parameters.
[0103] Control strategy execution device 6: It is used to decompose the generated control strategy and send it to the air conditioning management system. The air conditioning management system is responsible for executing specific control actions. At the same time, it performs closed-loop adjustments based on the collected real-time air conditioning operating data and environmental data.
[0104] Display interface device 7: It is used to display the process data of the interaction between the central air conditioner and the power grid.
[0105] Alarm processing device 8: When the internal environmental data of the building exceeds the limit, a certain form of alarm is issued. A certain form of alarm can be one or more forms of alarm such as short message, sound, text, and picture.
[0106] The controllable load calculation device 3, the data acquisition device 2 and the control strategy execution device 6 communicate with the terminal device 1 respectively. The terminal device 1 includes a load control terminal 11, a smart meter 12, an environmental sensor 13, and an air conditioning management system 14.
[0107] The data acquisition device 2 includes a data collector, which inputs the collected commercial building data and load control data to the processor for processing; after the processing is completed, the commercial building data is stored in the hard disk memory, and the load control data is input to Control strategy generating device 4.
[0108] The controllable load calculation device 3 includes a timer and a calculator; the timer detects that the controllable load calculation device 3 reaches the calculation time; triggers the processor to use the commercial building data and configuration parameters on the hard disk memory, and convert the commercial building data And the configuration parameters are input into the calculator for calculation, and after the calculation is completed, the calculation result is sent to the power grid side through the serial server.
[0109] The control strategy generation device 4 is implemented by the processor. When the serial port server receives the control command from the load control terminal 11, the processor starts the strategy generation, reads the collected data and configuration data in the hard disk memory, and queries the strategy expert library 5, and the processing ends Then, the generated control strategy is input to the control strategy execution device 6.
[0110] The strategy plan expert library 5 is configured on the hard disk storage.
[0111] The control strategy execution device 6 includes a random access memory RAM and a network switch; the random access memory RAM stores the control strategy; the network switch is connected to the air conditioning management system 14.
[0112] The alarm processing device 8 includes a short message sending device, a speaker and a liquid crystal display.
[0113] The display interface device 7 performs display through a liquid crystal display.
[0114] Commercial building data includes load data at key metering points, internal environmental data, external environmental data, and air conditioning operating data.
[0115] The key metering point refers to the metering point of the branch circuit where the load value changes due to air conditioning control.
[0116] Internal environmental data refers to the temperature and humidity of representative monitoring points on each floor.
[0117] The external environment data includes temperature, humidity, illuminance, wind speed and wind direction.
[0118] Air-conditioning operating data includes air-conditioning host operating data, circulating water pump operating data, fresh air unit operating data, and fan coil operating data.
[0119] The air-conditioning host operating data includes operating status, inlet water temperature, and outlet water temperature.
[0120] The operating data of the circulating water pump includes operating status and operating frequency.
[0121] The operating data of the fresh air unit includes operating status, return air temperature, return air humidity, and water valve opening.
[0122] The operating data of the fan coil unit includes operating status and terminal temperature.
[0123] The operating status includes failure, operation, stop, and maintenance.
[0124] Load control data refers to load control period and load control capacity.
[0125] Receiving commercial building data refers to cyclically obtaining load data of smart meters, internal and external environmental data of environmental sensors, and air-conditioning operation data of the air-conditioning management system through active requests.
[0126] Receiving load control data refers to receiving load control data from the grid side in a passive receiving manner.
[0127] Controllable load calculation means that a calculation is performed at the beginning of each set calculation cycle.
[0128] Control strategies, including reducing the number of air-conditioning hosts, reducing the number of circulating water pumps, reducing the number of new fan units, controlling the temperature of the air-conditioning host’s water outlet, controlling the opening of the fresh air valve, turning off some fan coils, controlling the operating frequency of the circulating water pump, and controlling the fresh air The return air temperature of the unit.
[0129] Control strategy decomposition and issuance means that the control strategy is divided into the smallest control unit at the load control period issued by the grid side and the control instructions are issued to the air conditioning management system in an orderly manner.
[0130] Closed-loop adjustment means that no external human intervention is required during the execution of the control strategy, and the control strategy can be automatically adjusted only by relying on real-time collected commercial building data.
[0131] The interface for displaying the process data of the interaction between the central air conditioning of commercial buildings and the power grid can be in the form of graphics, animation, web pages, etc., and the interface highlights the load data and internal environmental data during the interaction in a significant way.
[0132] The control method for the central air conditioning load control system of commercial buildings that interacts with the power grid provided by the present invention includes the following steps:
[0133] A. Commercial building data and load control data are input from unit 1 to data acquisition device 2 in a certain format.
[0134] The input data format can be negotiated and customized by the data source manufacturer and the implementer of this method.
[0135] B. When load control data is generated in the power grid load control terminal, the power grid load control terminal actively sends it to the data acquisition device 2 in real time.
[0136] C. When the smart meter 12, the environmental sensor 13, and the air conditioning management system 14 receive the data acquisition device request command, they will actively upload the current load data, internal and external environmental data and air conditioning operation data to the data acquisition device 2 in real time.
[0137] D. After receiving the commercial building data, the data acquisition device 2 converts the cost method internal format data and stores it.
[0138] E. After the data acquisition device 2 receives the load control data, it converts the internal format data of the cost method, and inputs the converted data to the control strategy generation device 4.
[0139] F. The controllable load calculation device 3 uses the input commercial building data and air-conditioning performance data to calculate the controllable load capacity of the central air conditioner online according to the set calculation period, and sends the calculation result to the grid load control terminal in the format agreed by both parties. Simultaneously input to the display interface 7 for refreshing the display interface.
[0140] G. The control strategy generating device 4 receives the input load control data, queries the strategy plan expert database 5 according to the load control capacity and current air-conditioning operating parameters, obtains the recommended control strategy, and combines the commercial building data analysis to obtain the final strategy, and inputs it to the control Strategy execution device 6.
[0141] H. After receiving the control strategy, the control strategy execution device 6 first caches the control strategy in the random storage RAM. When the time period required by the load control is reached, the control strategy is divided into the smallest control unit, and these sub-control commands are issued to the air conditioning management system in an orderly manner, and the air conditioning management system is responsible for executing control actions. At the same time, after the first sub-control command is issued, the received commercial building data is analyzed in real time. If it is found that the internal environmental parameters of the building have a tendency to exceed or exceed the limit, adjust the remaining control strategy and input the information of the limit value. To the alarm processing device 8. When the entire control strategy is successfully executed, use the strategy to modify the strategy plan expert library 5.
[0142] I. The control strategy execution device 6 inputs the load data, internal environment data and air-conditioning operation data of the current air-conditioning control strategy execution process into the display interface 7 to refresh the display interface.
[0143] The strategy plan expert library 5 receives the load control capacity and current air-conditioning operating parameters input by the control strategy generating device 4, and returns the recommended control strategy.
[0144] The alarm processing device 8 generates a certain form of alarm information according to the violation information of the internal environmental parameters of the building input by the control strategy execution device 6, and sends it to the commercial building management personnel. The form of the alarm information can be text, short message, sound or screen display.
[0145] The display interface device 7 updates the display interface according to the controllable load calculation result input by the controllable load calculation device 3 and the load data of the control strategy execution process input by the control strategy execution device 6, internal environment data and air conditioning operation data.
[0146] The basic process of the control strategy generation device 4 of the commercial building central air-conditioning load control method that interacts with the power grid provided by the present invention is as follows figure 2 Shown, including the following steps:
[0147] Step 400: Receive the load control data from the data acquisition device, and perform preliminary processing on the data according to the internal data format.
[0148] Step 401: According to the load control capacity and the air conditioning operating parameters from the data acquisition device, query the strategy plan expert database to obtain the recommended control strategy.
[0149] Step 402: According to the air-conditioning operation data from the data acquisition device and the internal and external environment data, combined with the load characteristics of the central air-conditioning of commercial buildings, check whether the control strategy meets the requirements in terms of load control capacity and internal environment.
[0150] Step 403: If the above condition check fails, then step 404 is executed, otherwise, step 405 is executed.
[0151] Step 404: Adjust the control strategy according to the load characteristics of the central air-conditioning of the commercial building, generate a new control strategy, and resubmit it for verification.
[0152] Step 405: Input the checked control strategy to the control strategy execution device.
[0153] The basic process of the control strategy execution device 6 of the commercial building central air-conditioning load control method that interacts with the power grid provided by the present invention is as follows: image 3 Shown, including the following steps:
[0154] Step 600: Receive the control strategy from the control strategy generating device, perform preliminary processing on the control strategy according to the internal data format, and cache it in the random storage RAM.
[0155] Step 601: cyclically detect whether the current time is within the time period required by the load control.
[0156] Step 602: If the load control period has been entered, split the control strategy according to the smallest controllable unit to form multiple independent sub-control strategies.
[0157] Step 603: According to the operating characteristics of the air conditioner, these sub-control strategies are reasonably optimized and combined, and then the control commands are issued to the air conditioner management system in an orderly manner.
[0158] Step 604: Receive commercial building data from the data acquisition device, perform preliminary processing according to the internal data format, and input load data, internal environment data, and air conditioning operation data into the display interface in real time.
[0159] Step 605: Determine whether the internal environmental data of the building in the commercial building data has a limit value or a limit value trend.
[0160] Step 606: If there is an over-limit or over-limit trend, adjust the remaining sub-control strategies that have not been issued for execution, and input the over-limit information into the alarm processing device at the same time.
[0161] Step 607: After the current control strategy is successfully executed, use the current control strategy to modify the strategy plan expert database.
[0162] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: Modifications or equivalent replacements are made to the specific embodiments of, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.
