Energy-saving control method and system for air compression station

Abstract

The invention relates to an air compression station energy-saving control method and system, and relates to the technical field of air compression stations, and the method comprises the steps: obtaining a required air supply amount, a power frequency number group, a variable frequency number group, a power frequency air supply amount and a variable frequency air supply range; according to the demand air supply amount and the power frequency air supply amount, the power frequency demand number and the residual demand air supply amount are calculated; determining a power frequency working number from the power frequency number group according to the power frequency demand number, and forming a power frequency working group according to the power frequency working number; when the residual required gas supply amount falls into the variable-frequency gas supply range, determining a variable-frequency working number from the variable-frequency number group; the variable-frequency air compressor corresponding to the variable-frequency working number is adjusted according to the remaining required air supply amount to obtain the variable-frequency air supply amount; forming a gas supply scheme according to the power frequency gas supply amount, the variable frequency gas supply amount, the power frequency working group and the variable frequency working number; and the air compression station is controlled to supply air according to the air supply scheme. The air compression station has the effect that the air compression station is more energy-saving in the air supply process.

Description

Technical Field

[0001] This invention relates to the field of air compressor station technology, and in particular to an energy-saving control method and system for air compressor stations. Background Technology

[0002] An air compressor station is a dedicated air supply station that continuously provides compressed air that meets pressure and cleanliness requirements to various air-consuming terminals within a designated air supply area through a systematic pipeline and control system. It is the core compressed air supply unit in industrial production.

[0003] In related technologies, air compressor stations often adopt a fixed number of start-stop control method to meet the air demand of the air-consuming end. That is, a fixed number of air compressors are started and run continuously according to the air consumption scale of the air-consuming end to maintain a stable air supply output and discharge excess compressed air.

[0004] Regarding the aforementioned technologies, the control method of continuously operating a fixed number of air compressors lacks dynamic adaptability to the actual air demand at the user end, and is prone to causing a large amount of compressed air to be vented and wasted due to the mismatch between the fixed air supply scale and the real-time air consumption. Summary of the Invention

[0005] To make air compressor stations more energy-efficient in the air supply process, this invention provides an energy-saving control method and system for air compressor stations.

[0006] In a first aspect, the present invention provides an energy-saving control method for an air compressor station, which adopts the following technical solution: An energy-saving control method for an air compressor station includes: Step 1: Obtain the required gas supply volume, power frequency number group, variable frequency number group, power frequency gas supply volume, and variable frequency gas supply range; Step 2: Calculate the number of gas demand items and the remaining gas supply based on the demand and the mains frequency gas supply. Step 3: Determine the power frequency work number from the power frequency number group according to the number of power frequency requirements, and form a power frequency work group according to the power frequency work number; Step 4: When the remaining gas demand falls within the range of the frequency converter gas supply, determine the frequency converter working number from the frequency converter number group; Step 5: Adjust the variable frequency air compressor corresponding to the variable frequency work number according to the remaining air supply demand to obtain the variable frequency air supply. Step 6: Formulate a gas supply plan based on the power frequency gas supply, variable frequency gas supply, power frequency work group, and variable frequency work group number; Step 7: Control the air compressor station to supply gas according to the gas supply plan.

[0007] By adopting the above technical solution, the number of operating and air supply of industrial frequency and variable frequency air compressors can be dynamically adjusted according to the actual demand for air supply, avoiding the phenomenon of a large amount of compressed air being wasted due to the mismatch between the air supply scale and the real-time air consumption in the traditional fixed number start-stop control method.

[0008] Optional, also includes: Step 8: When the remaining gas demand does not fall within the range of variable frequency gas supply, determine the maximum and minimum variable frequency gas supply based on the range of variable frequency gas supply. Step 9: When the remaining gas supply demand is less than the minimum frequency converter gas supply, determine the minimum frequency converter working number from the frequency converter number group; Step 10: Adjust the variable frequency air compressor corresponding to the minimum variable frequency working number according to the minimum variable frequency air supply to obtain the minimum variable frequency working air supply. Step 11: Based on the power frequency gas supply, minimum variable frequency gas supply, power frequency work group, and minimum variable frequency work group number, form a minimum gas supply plan and control the air compressor station to supply gas according to the minimum gas supply plan; Step 12: When the remaining gas demand is greater than the maximum variable frequency gas supply, calculate the rated number of variable frequency demands and the variable frequency gas supply margin based on the remaining gas demand and the maximum variable frequency gas supply. Step 13: Determine the rated frequency converter work number and frequency regulation work number from the frequency converter number group according to the number of rated frequency converter requirements; Step 14: Form a rated frequency conversion work group based on the rated frequency conversion work number and the frequency modulation work number, and adjust the frequency conversion air compressor corresponding to the frequency modulation work number according to the frequency conversion air supply margin to obtain the frequency modulation air supply. Step 15: Based on the power frequency gas supply, maximum variable frequency gas supply, frequency regulation gas supply, power frequency working group, rated variable frequency working group, and frequency regulation working group number, form a precise gas supply plan, and control the air compressor station to supply gas according to the precise gas supply plan.

[0009] By adopting the above technical solution, when the remaining gas demand exceeds the range of frequency conversion gas supply, the gas supply scheme of the air compressor station is further optimized by subdividing the processing logic of the minimum and maximum frequency conversion gas supply, which not only meets the basic demand but also reduces energy waste.

[0010] Optionally, specific methods for calculating the number of gas demand items and the remaining gas demand based on the demand gas supply and the power frequency gas supply include: Step 200: Determine the number of power frequency numbers based on the power frequency number group; Step 201: Calculate the total power frequency gas supply based on the number of power frequency numbers and the power frequency gas supply volume; Step 202: When the demand for gas supply is less than the total power frequency gas supply, calculate the minimum number of power frequency demand items based on the demand for gas supply and the power frequency gas supply, and define the minimum number of power frequency demand items as the number of power frequency demand items. Step 203: Calculate the total gas supply based on the minimum number of gas demanded and the gas supply volume, and calculate the remaining gas supply based on the demand volume and the total gas supply volume. Step 204: When the demand for gas supply exceeds the total power frequency gas supply, define the number of power frequency numbers as the number of power frequency demands; Step 205: Calculate the remaining gas demand based on the demand and total power frequency gas supply.

[0011] By adopting the above technical solution, the quantitative calculation logic of the number of power frequency demand units was clarified. For different relationships between the demand gas supply and the total power frequency gas supply, appropriate calculation rules were formulated to ensure that the number of selected power frequency air compressors not only meets the core gas supply demand, but also reduces the energy waste caused by excessive investment in power frequency equipment.

[0012] Optionally, it also includes a specific method for determining the power frequency work number from the power frequency number group based on the number of power frequency requirements, and forming a power frequency work group based on the power frequency work number, the method including: Step 300: Find the power frequency number and its corresponding usage duration based on the power frequency number group; Step 301: Sort the power frequency numbers in ascending order according to the usage duration to obtain sorted number groups; Step 302: Select power frequency numbers from the sorted numbering group in sequence according to the number of power frequency requirements as power frequency work numbers, and form power frequency work groups according to the power frequency work numbers.

[0013] By adopting the above technical solution, priority is given to putting equipment with shorter usage time into operation, which realizes the balanced use of industrial frequency air compressors and reduces the problem of accelerated wear and shortened lifespan of a single piece of equipment due to long-term continuous operation.

[0014] Optional, also includes: Step 16: After the air compressor station starts supplying air, obtain the total air supply volume; Step 17: When the total gas supply is less than the demand gas supply, and the number of power frequency demand is less than the number of power frequency numbers, obtain the remaining power frequency numbers based on the power frequency working number and the power frequency number group. Step 18: Determine the calibration frequency number based on the remaining frequency numbers, control the frequency air compressor corresponding to the calibration frequency number to replace the frequency air compressors in the frequency work group in sequence, and obtain the total air supply for frequency calibration. Step 19: When the total air supply of the power frequency calibration is equal to the required air supply, the power frequency working number corresponding to the power frequency air compressor to be replaced is defined as the damage number, and the power frequency abnormal signal is output according to the damage number.

[0015] By adopting the above technical solution, when the actual total gas supply does not meet the demand, the remaining power frequency equipment is used for replacement and verification. At the same time, abnormal signals are output in a timely manner to remind staff to quickly repair the equipment, thereby reducing the situation of insufficient gas supply and abnormal energy consumption caused by the continuous operation of faulty equipment, and ensuring the stability of the air compressor station's gas supply.

[0016] Optional, also includes: Step 20: When the total gas supply is less than the demand gas supply, and the number of power frequency demand is equal to the number of power frequency numbers, obtain the working frequency inverter number; Step 21: Obtain the remaining inverter numbers based on the already working inverter numbers and inverter number groups; Step 22: Determine the calibration frequency converter number based on the remaining frequency converter numbers, control the frequency converter air compressor corresponding to the calibration frequency converter number to replace the industrial frequency air compressor in the industrial frequency working group in sequence and adjust it to the maximum frequency converter air supply, and obtain the total air supply for frequency converter calibration; Step 23: When the total air supply of the frequency converter is equal to the required air supply, the working number of the replaced power frequency air compressor is defined as the damage number, and a power frequency abnormality signal is output according to the damage number.

[0017] By adopting the above technical solution and introducing frequency converters as the calibration carrier, the situation of fault calibration when there are no remaining power frequency devices is compensated for, ensuring that faulty power frequency air compressors can be found even when there are no remaining power frequency devices, and further improving the comprehensiveness of fault handling in air compressor stations.

[0018] Optionally, a control method is also included when the total gas supply for power frequency calibration is not equal to the demand for gas supply, the method comprising: Step 1900: When the total gas supply for power frequency calibration is not equal to the demand gas supply, and the total gas supply for power frequency is equal to the total gas supply, continue to execute step 18; Step 1901: When the total air supply of the power frequency calibration is not equal to the required air supply, and the total air supply of the power frequency is not equal to the total air supply, the power frequency working number corresponding to the power frequency air compressor to be replaced is defined as the damage number. Step 1902: Select the recalibrated power frequency number from the remaining power frequency numbers, control the power frequency air compressor corresponding to the recalibrated power frequency number to replace the power frequency air compressor in the power frequency work group in turn, and obtain the total air supply of the power frequency recalibration. Step 1903: When the total air supply volume of the power frequency recheck is equal to the required air supply volume, the power frequency working number corresponding to the power frequency air compressor to be replaced is defined as the damage number, and a damage number group is formed based on all the damage numbers; Step 1904: Output power frequency abnormal signal according to the damage number group.

[0019] By adopting the above technical solution, when the total gas supply during power frequency calibration is not equal to the required gas supply, the process of troubleshooting and handling is further refined, avoiding energy waste caused by ineffective replacement, ensuring that the faulty air compressor can be accurately identified, thereby guaranteeing the stable operation of the air compressor station and the quality of gas supply.

[0020] Optionally, it also includes a control method for rechecking when the calibration power frequency number does not exist, the method including: Step 19020: If the recalibration power frequency number does not exist, obtain the backup power frequency number; Step 19021: Control the backup power frequency number corresponding power frequency air compressor to replace the power frequency air compressor in the power frequency work group in sequence, and execute steps 1902 to 1903 until the total power frequency air supply is equal to the required air supply.

[0021] By adopting the above technical solution and using a spare industrial frequency air compressor for calibration, the problem of being unable to continue troubleshooting when there is no spare industrial frequency air compressor is solved, thus improving the emergency response capability and stability of the air compressor station.

[0022] Optionally, it also includes an optimized method for obtaining the required gas supply, the method comprising: Step 100: Obtain the provisional gas supply demand; Step 101: When the provisional gas demand falls within the preset reasonable gas demand range, the provisional gas demand is defined as the gas demand. Step 102: When the provisional gas demand does not fall within the preset reasonable gas demand range, output a gas demand abnormality signal.

[0023] By adopting the above technical solution, abnormal provisional gas demand data can be effectively filtered out, such as sensor failures and data transmission errors, ensuring that the final determined gas demand conforms to the actual gas consumption pattern.

[0024] Secondly, the present invention provides an energy-saving control system for an air compressor station, which adopts the following technical solution: An energy-saving control system for an air compressor station includes: The acquisition module is used to acquire the required gas supply volume, power frequency number group, variable frequency number group, power frequency gas supply volume, and variable frequency gas supply range. A memory for storing the program of an energy-saving control method for an air compressor station as described above; The processor loads and executes programs from memory.

[0025] By adopting the above technical solution, the acquisition module can collect key data on the operation of the air compressor station in real time, providing an accurate information basis for subsequent processing. The memory can stably store the program of the energy-saving control method, ensuring the integrity and traceability of the data. The processor can quickly load and execute the program in the memory, realizing dynamic and precise control of the air supply of the air compressor station, effectively reducing energy consumption and improving the efficiency and quality of air supply.

[0026] In summary, the present invention has at least one of the following beneficial technical effects: By coordinating the air supply of both industrial frequency air compressors and variable frequency air compressors, the number of operating equipment and air supply parameters can be dynamically adjusted according to actual air demand, reducing energy waste caused by the traditional fixed-number start-up and shutdown method.

[0027] By monitoring the air supply volume and calibrating the industrial frequency air compressor, we can ensure a rapid response and handling in case of failure, reducing situations such as air supply interruption or equipment damage. Attached Figure Description

[0028] Figure 1 This is a flowchart of an energy-saving control method for an air compressor station according to an embodiment of this application. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] This invention discloses an energy-saving control method for an air compressor station. (Refer to...) Figure 1 An energy-saving control method for air compressor stations includes: Step 1: Obtain the required gas supply volume, power frequency number group, variable frequency number group, power frequency gas supply volume, and variable frequency gas supply range.

[0031] Demand air supply refers to the total amount of compressed air required by all air-consuming terminals within the air compressor station's supply area under current operating conditions. It represents the volume of compressed air required per unit time, for example, 200 m³ / min. Demand air supply is obtained by collecting real-time air consumption data from all air-consuming terminals within the supply area via flow sensors in the air compressor station's main distribution network. This data is then combined with the actual pressure deviation between the pressure setpoint of the air compressor station's main distribution network and the deviation value of the pressure sensor, and dynamically and indirectly calculated using a PID algorithm.

[0032] The power frequency number group refers to a set of numbers that uniquely identify all power frequency air compressors in the air compressor station. Each power frequency number in the power frequency number group (the power frequency number refers to the number of each power frequency air compressor) is matched one-to-one with the corresponding power frequency air compressor. For example, the power frequency number group contains power frequency numbers such as G1, G2, and G3. The power frequency number group is obtained by the staff in advance numbering the power frequency air compressors in the air compressor station according to the actual situation and entering it into the system.

[0033] A variable frequency (VFD) number group refers to a set of numbers that uniquely identify all variable frequency air compressors in an air compressor station. Each VFD number in the VFD number group (VFD number refers to the number of each VFD air compressor) is matched one-to-one with the corresponding VFD air compressor. For example, the VFD number group may contain VFD numbers such as B1 and B2. The VFD number group is obtained by staff pre-numbering the VFD air compressors in the air compressor station according to the actual situation and entering the numbers into the system.

[0034] The industrial frequency air supply volume refers to the standard air volume supplied per unit time by a single industrial frequency air compressor in an air compressor station when operating under rated conditions. It represents the rated air supply flow rate of a single industrial frequency air compressor, and the industrial frequency air supply volume is consistent across all industrial frequency air compressors. The industrial frequency air supply volume is obtained by staff in advance based on the product manuals and actual test data of the industrial frequency air compressors in the air compressor station, and then entered into the system.

[0035] The variable frequency air supply range refers to the range of air flow that a single variable frequency air compressor can stably adjust, which is the range of air volume supplied per unit time, such as 5m³ / min to 50m³ / min. The variable frequency air supply range is consistent for all variable frequency air compressors. The variable frequency air supply range is obtained by staff in advance based on the product manual of the variable frequency air compressor and actual operation test data, and then entered into the system.

[0036] Step 2: Calculate the number of gas demand items and the remaining gas demand based on the demand gas supply and the power frequency gas supply.

[0037] The number of industrial frequency demand units refers to the number of industrial frequency air compressors that need to be put into operation to meet the demand for air supply. The calculation method for the number of industrial frequency demand units is described in detail in subsequent steps 200 to 205, and will not be repeated here.

[0038] The remaining demand for air supply refers to the portion of air supply that cannot be met even after activating the required number of industrial frequency air compressors. The calculation method for the remaining demand for air supply is also described in detail in subsequent steps 200 to 205, and will not be repeated here.

[0039] Step 3: Determine the power frequency work number from the power frequency number group according to the number of power frequency requirements, and form a power frequency work group according to the power frequency work number.

[0040] The power frequency work order number refers to the number selected from the power frequency number group that corresponds to the power frequency air compressor to be put into operation. The method for determining the power frequency work order number is described in detail in subsequent steps 300 to 302, and will not be repeated here.

[0041] A power frequency workgroup is a set of power frequency work order numbers. It represents a specific list of numbers for the power frequency air compressors that need to be operated. The power frequency workgroup is formed by selecting all the power frequency work order numbers and creating a set from these numbers.

[0042] Step 4: When the remaining gas demand falls within the range of the frequency converter gas supply, determine the frequency converter working number from the frequency converter number group.

[0043] When the remaining demand for air supply falls within the range of variable frequency air supply, it indicates that the remaining demand for air supply cannot be met by adjusting a single variable frequency air compressor.

[0044] The variable frequency (VFD) work order number refers to the number selected from the VFD number group corresponding to the VFD air compressor to be put into operation. The method for determining the VFD work order number is similar to the method for determining the power frequency work order number in subsequent steps 300 to 302. It is also to select the VFD air compressor with the shortest accumulated working time. For example, if there are five VFD air compressors numbered B1, B2, B3, B4, and B5 in the VFD number group, and B3 has the shortest accumulated working time, then B3 will be selected as the VFD work order number. This reduces the imbalance in the use of VFD air compressors caused by excessively long working time of a single VFD air compressor.

[0045] Step 5: Adjust the variable frequency air compressor corresponding to the variable frequency work number according to the remaining air supply demand to obtain the variable frequency air supply.

[0046] Variable frequency air supply refers to the actual volume of compressed air output per unit time after the variable frequency air compressor corresponding to the variable frequency working number adjusts the flow rate according to the remaining air supply demand. The value of variable frequency air supply is consistent with the value of remaining air supply demand, and it is used to make up for the part of the air supply demand that is not met after the operation of the fixed frequency air compressor.

[0047] Step 6: Formulate a gas supply plan based on the power frequency gas supply, variable frequency gas supply, power frequency work group, and variable frequency work group number.

[0048] The gas supply plan refers to the plan for the operation of fixed-frequency air compressors, variable-frequency air compressors, and corresponding gas supply volumes to meet the current gas supply demand of the air compressor station. The gas supply scheme is formed by associating and matching all the power frequency work numbers with the power frequency gas supply within the power frequency work group, and associating and matching the variable frequency work numbers with the adjusted variable frequency gas supply. This results in a complete instruction scheme that includes the power frequency air compressor number and its corresponding power frequency gas supply, and the variable frequency air compressor number and its corresponding variable frequency gas supply. For example, under the current gas supply demand conditions, the power frequency work group includes power frequency air compressors numbered G1, G3, G4, and G5, and a variable frequency air compressor with work number B2. The power frequency gas supply is 50 m³ / min, and the variable frequency gas supply is 8 m³ / min. Then, the gas supply scheme refers to controlling the power frequency air compressors numbered G1, G3, G4, and G5 to supply gas at 50 m³ / min, and controlling the variable frequency air compressor numbered B2 to supply gas at 8 m³ / min.

[0049] Step 7: Control the air compressor station to supply gas according to the gas supply plan.

[0050] The air compressor station is controlled to supply air according to the air supply plan, thereby achieving precise regulation of the air compressor station's air supply and meeting the compressed air demand of all air-consuming terminals in the air supply area under the current operating conditions. This not only meets the air supply demand but also reduces waste.

[0051] This also includes: Step 8: When the remaining gas demand does not fall within the range of variable frequency gas supply, determine the maximum and minimum variable frequency gas supply based on the range of variable frequency gas supply.

[0052] Maximum variable frequency air supply capacity refers to the upper limit of the variable frequency air supply range. It represents the maximum volume of compressed air that a single variable frequency air compressor can stably adjust and output per unit time, and is the rated air supply flow rate of a single variable frequency air compressor operating at full load. The maximum variable frequency air supply capacity is determined based on the upper limit of the variable frequency air supply range. For example, when the variable frequency air supply range is 5 m³ / min to 50 m³ / min, the maximum variable frequency air supply capacity is 50 m³ / min.

[0053] Minimum variable frequency air supply capacity refers to the lower limit of the variable frequency air supply range. It is the minimum volume of compressed air that a single variable frequency air compressor can stably adjust and output, and the minimum air flow rate required for a single variable frequency air compressor to maintain stable operation. The minimum variable frequency air supply capacity is determined based on the lower limit of the variable frequency air supply range. For example, when the variable frequency air supply range is 5 m³ / min to 50 m³ / min, the minimum variable frequency air supply capacity is 5 m³ / min.

[0054] Step 9: When the remaining gas supply demand is less than the minimum frequency converter gas supply, determine the minimum frequency converter working number from the frequency converter number group.

[0055] When the remaining demand for air supply is less than the minimum variable frequency air supply, it means that the remaining demand for air supply cannot be met by a single variable frequency air compressor within the normal adjustment range. However, it can be done by selecting a variable frequency air compressor and operating it at a state close to the minimum stable air supply to get as close to the demand as possible.

[0056] The minimum variable frequency operating number refers to the number selected from the variable frequency number group that corresponds to the variable frequency air compressor that operates at the minimum variable frequency air supply. The selection principle of the minimum variable frequency operating number is similar to that of the variable frequency operating number mentioned above. Variable frequency air compressors with shorter operating time are given priority. For example, in the variable frequency number groups B1, B2, and B3, if B1 has the shortest operating time, then B1 is selected as the minimum variable frequency operating number.

[0057] Step 10: Adjust the variable frequency air compressor corresponding to the minimum variable frequency working number according to the minimum variable frequency air supply to obtain the minimum variable frequency working air supply.

[0058] Minimum variable frequency working air supply refers to the actual volume of compressed air output per unit time after the variable frequency air compressor corresponding to the minimum variable frequency working number adjusts the flow rate according to the minimum variable frequency air supply. The value of minimum variable frequency working air supply is consistent with the value of minimum variable frequency air supply.

[0059] Step 11: Based on the power frequency gas supply, minimum variable frequency working gas supply, power frequency working group and minimum variable frequency working number, form a minimum gas supply plan and control the air compressor station to supply gas according to the minimum gas supply plan.

[0060] The minimum air supply scheme refers to the air supply plan developed to meet the needs of an air compressor station under special operating conditions where the remaining demand for air supply is less than the minimum variable frequency air supply. For example, under the current operating conditions, there are fixed frequency air compressors numbered G2 and G6 in the fixed frequency group, and a variable frequency air compressor numbered B4. The fixed frequency air supply is 50 m³ / min, and the minimum variable frequency air supply is 5 m³ / min. Then, the minimum air supply scheme refers to controlling the fixed frequency air compressors numbered G2 and G6 to supply air at 50 m³ / min, and controlling the variable frequency air compressor numbered B4 to supply air at 5 m³ / min.

[0061] Step 12: When the remaining gas demand is greater than the maximum variable frequency gas supply, calculate the rated number of variable frequency demands and the variable frequency gas supply margin based on the remaining gas demand and the maximum variable frequency gas supply.

[0062] When the remaining demand for air supply exceeds the maximum variable frequency air supply, it means that the remaining demand for air supply cannot be met by a single variable frequency air compressor within the normal adjustment range, and multiple variable frequency air compressors need to be used together to meet the demand.

[0063] The rated variable frequency demand number refers to the number of variable frequency air compressors required to operate at the maximum variable frequency air supply capacity in order to meet the remaining air supply demand. For example, if the remaining air supply demand is 70 m³ / min and the maximum variable frequency air supply capacity is 50 m³ / min, then 70 m³ / min divided by 50 m³ / min will give 1 and a remainder of 20 m³ / min. In this case, 1 is the rated variable frequency demand number.

[0064] The variable frequency air supply margin refers to the remaining air supply volume that cannot be met after the variable frequency air compressor operates at its maximum variable frequency air supply volume, based on the rated number of variable frequency demand units. For example, if the remaining air supply volume is 70 m³ / min and the maximum variable frequency air supply volume is 50 m³ / min, then dividing 70 m³ / min by 50 m³ / min will give 1 and a remainder of 20 m³ / min. This remainder of 20 m³ / min is the variable frequency air supply margin.

[0065] Step 13: Determine the rated frequency converter work number and frequency regulation work number from the frequency converter number group according to the number of rated frequency converter requirements.

[0066] The rated variable frequency work order number refers to the number selected from the variable frequency number group that corresponds to the variable frequency air compressor operating at its maximum variable frequency air supply capacity. The number of rated variable frequency work order numbers is consistent with the number of rated variable frequency compressors required. The method for determining the rated variable frequency work order number also prioritizes variable frequency air compressors with shorter operating time. For example, if there are four variable frequency air compressors (B1, B2, B3, and B4) in the variable frequency number group, and the rated variable frequency requirement is 2 units, and B1 and B2 have relatively shorter operating times, then B1 and B2 are the rated variable frequency work order numbers.

[0067] The frequency regulation work number refers to the number selected from the frequency conversion number group to correspond to the frequency conversion air compressor used to meet the frequency conversion air supply margin. The method for determining the frequency regulation work number is similar to the method for determining the frequency conversion work number, which also prioritizes the frequency conversion air compressor with the shorter cumulative working time. For example, in the frequency conversion number group, there are four frequency conversion air compressors: B1, B2, B3, and B4. Among them, B1 and B2 have already been selected as rated frequency conversion work numbers, while the remaining B4 has a less working time than B3. Therefore, B4 is the frequency regulation work number.

[0068] Step 14: Form a rated frequency conversion work group based on the rated frequency conversion work number and the frequency modulation work number, and adjust the frequency conversion air compressor corresponding to the frequency modulation work number according to the frequency conversion air supply margin to obtain the frequency modulation air supply.

[0069] A rated variable frequency work group refers to a set of rated variable frequency work order numbers, representing a specific list of variable frequency air compressor numbers that currently need to operate at maximum variable frequency air supply. It is formed by combining all selected rated variable frequency work order numbers into a single set; this set constitutes the rated variable frequency work group.

[0070] Frequency-controlled air supply refers to the volume of compressed air actually output per unit time by the frequency-controlled air compressor corresponding to the frequency-controlled work number after adjusting the flow rate based on the frequency-controlled air supply margin. Its value is consistent with the value of the frequency-controlled air supply margin and is used to make up for the air supply demand that is not met after the rated frequency-controlled work group is in operation.

[0071] Step 15: Based on the power frequency gas supply, maximum variable frequency gas supply, frequency regulation gas supply, power frequency working group, rated variable frequency working group, and frequency regulation working group number, form a precise gas supply plan, and control the air compressor station to supply gas according to the precise gas supply plan.

[0072] A precise air supply scheme refers to a precise air supply command formulated by integrating the operating parameters of a fixed-frequency air compressor and multiple variable-frequency air compressors to meet the needs of an air compressor station under complex operating conditions where the remaining demand for air supply exceeds the maximum variable-frequency air supply. A precise air supply scheme requires associating all power frequency numbers within the power frequency work group with power frequency air supply volume, all numbers within the rated variable frequency work group with maximum variable frequency air supply volume, and frequency modulation work group number with adjusted frequency modulation air supply volume. This ultimately forms a complete control command containing the power frequency air compressor number and air supply volume, as well as the rated variable frequency air compressor number and air supply volume. For example, under current operating conditions, the power frequency work group includes two air compressors, G1 and G3, with a power frequency air supply volume of 50 m³ / min; the rated variable frequency work group includes two air compressors, B2 and B4, with a maximum variable frequency air supply volume of 50 m³ / min; and the frequency modulation work group number is B1, with a frequency modulation air supply volume of 20 m³ / min. Therefore, the precise air supply scheme must simultaneously control G1 and G3 to operate at 50 m³ / min, B2 and B4 to operate at 50 m³ / min, and B1 to operate at 20 m³ / min, ensuring that the total air supply volume precisely matches the actual demand.

[0073] The specific methods for calculating the number of gas demand items and the remaining gas demand based on the demand gas supply and the power frequency gas supply include: Step 200: Determine the number of power frequency numbers based on the power frequency number group.

[0074] The number of industrial frequency numbers refers to the total number of numbers corresponding to all industrial frequency air compressors in the industrial frequency number group. The number of industrial frequency numbers is obtained by the system counting the number of all independent numbers in the industrial frequency number group. For example, if the industrial frequency number group contains five independent numbers from G1 to G5, the number of industrial frequency numbers is 5 units.

[0075] Step 201: Calculate the total power frequency gas supply based on the number of power frequency numbers and the power frequency gas supply volume.

[0076] Total power frequency air supply refers to the maximum total volume of compressed air that can be provided per unit time when all power frequency air compressors are running together. The total power frequency air supply is calculated by multiplying the number of power frequency compressors by the air supply capacity of a single power frequency compressor. For example, when there are 8 power frequency compressors and the air supply capacity is 50 m³ / min, the total power frequency air supply is 400 m³ / min, which is 8 multiplied by 50 m³ / min.

[0077] Step 202: When the demand for gas supply is less than the total power frequency gas supply, calculate the minimum number of power frequency demand items based on the demand for gas supply and the power frequency gas supply, and define the minimum number of power frequency demand items as the number of power frequency demand items.

[0078] The minimum number of industrial frequency air compressors required refers to the minimum number of industrial frequency air compressors that must be put into operation to meet the current air supply demand. The minimum number of industrial frequency air compressors required is calculated by dividing the demanded air supply by the air supply capacity of a single industrial frequency air compressor and rounding up. For example, when the demanded air supply is 380 m³ / min and the industrial frequency air supply is 50 m³ / min, 380 divided by 50 equals 7.6. After rounding up, the minimum number of industrial frequency air compressors required is 7. This minimum number of industrial frequency air compressors is defined as the number of industrial frequency air compressors required.

[0079] Step 203: Calculate the total gas supply based on the minimum number of gas demanded and the gas supply volume, and calculate the remaining gas supply volume based on the demand volume and the total gas supply volume.

[0080] Total industrial frequency air supply refers to the total air supply capacity of all industrial frequency air compressors operating together, calculated based on the minimum number of industrial frequency demand units and the air supply capacity of a single industrial frequency compressor. It is calculated as the product of the minimum number of industrial frequency demand units and the industrial frequency air supply capacity. For example, when the minimum number of industrial frequency demand units is 7 and the industrial frequency air supply capacity is 50 m³ / min, the total industrial frequency air supply capacity is 350 m³ / min, which is 7 multiplied by 50 m³ / min.

[0081] The remaining gas supply at this point is obtained by subtracting the demand gas supply from the total power frequency gas supply. For example, when the demand gas supply is 380 m³ / min and the total power frequency gas supply is 350 m³ / min, the remaining demand gas supply is 30 m³ / min, which is obtained by subtracting 350 m³ / min from 380 m³ / min.

[0082] Step 204: When the demand for gas supply is greater than the total power frequency gas supply, the number of power frequency numbers is defined as the number of power frequency demand numbers.

[0083] When the demand for gas supply exceeds the total power frequency gas supply, it means that even if all power frequency air compressors in the power frequency number group are put into operation, the current demand still cannot be met. In this case, the number of power frequency numbers is directly defined as the number of power frequency demands. For example, if the number of power frequency numbers is 8, the number of power frequency demands is 8.

[0084] Step 205: Calculate the remaining gas demand based on the demand and total power frequency gas supply.

[0085] At this point, the remaining gas supply demand is obtained by subtracting the demand gas supply from the total power frequency gas supply. For example, when the demand gas supply is 440 m³ / min and the total power frequency gas supply is 400 m³ / min, the remaining gas supply demand is 40 m³ / min, which is obtained by subtracting 400 m³ / min from 440 m³ / min.

[0086] This also includes a specific method for determining the power frequency work number from the power frequency numbering group based on the number of power frequency requirements, and forming a power frequency work group based on the power frequency work number. This method includes: Step 300: Find the power frequency number and its corresponding usage duration based on the power frequency number group.

[0087] The industrial frequency number is a unique identifier assigned to each industrial frequency air compressor to distinguish different compressors, such as G1, G2, G3, etc. The industrial frequency number is obtained by pre-numbering each industrial frequency air compressor and entering it into the system.

[0088] The used time refers to the cumulative working time of the industrial frequency air compressor. The used time is obtained by the system recording the running time of each industrial frequency air compressor through a built-in timer and updating it in real time in the database and associating it with the corresponding industrial frequency number. For example, when the air compressor with industrial frequency number G1 has accumulated 200 hours of operation, the system will associate this data with the number G1 and store it.

[0089] Step 301: Sort the power frequency numbers in ascending order according to the usage duration to obtain the sorted number group.

[0090] A sorted number group refers to a set of numbers formed by arranging the power frequency numbers in ascending order according to the duration of use. For example, the original power frequency number group contains G1 (200 hours), G2 (150 hours), and G3 (300 hours), and after sorting, we get the sorted number group G2, G1, and G3.

[0091] Step 302: Select power frequency numbers from the sorted numbering group in sequence according to the number of power frequency requirements as power frequency work numbers, and form power frequency work groups according to the power frequency work numbers.

[0092] The process of forming a power frequency work group is as follows: the system selects the corresponding number of power frequency numbers from the front of the sorting number group according to the number of power frequency requirements. For example, when the number of power frequency requirements is 2 units and the sorting number group is G2, G1, G3, the system will select G2 and G1 as power frequency work group numbers and combine the two numbers G2 and G1 to form a power frequency work group.

[0093] This also includes: Step 16: After the air compressor station starts supplying air, obtain the total air supply.

[0094] Total air supply refers to the total volume of compressed air actually output by all operating air compressors in the air compressor station per unit time. Total air supply is obtained by the system through real-time monitoring and data collection using flow sensors installed on the air supply pipeline.

[0095] Step 17: When the total gas supply is less than the demand gas supply, and the number of power frequency demand items is less than the number of power frequency numbers, obtain the remaining power frequency numbers based on the power frequency work number and the power frequency number group.

[0096] The remaining power frequency numbers refer to the numbers corresponding to the power frequency air compressors in the power frequency number group that were not selected to enter the power frequency work group. The remaining power frequency numbers are obtained by the system comparing the power frequency number group with the power frequency work group, and filtering out the numbers that exist in the power frequency number group but not in the power frequency work group. For example, if the power frequency number group is G1, G2, G3, G4, and the power frequency work group is G1, G2, then the remaining power frequency numbers are G3 and G4.

[0097] Step 18: Determine the calibration frequency number based on the remaining frequency numbers, control the frequency air compressor corresponding to the calibration frequency number to replace the frequency air compressors in the frequency work group in sequence, and obtain the total air supply for frequency calibration.

[0098] The calibration frequency number refers to the number selected from the remaining frequency numbers for use by the air compressors in the calibration frequency working group. The calibration frequency number is determined by prioritizing the frequency air compressors with shorter usage time. For example, if the remaining frequency numbers are G3 and G4, and G3 has been used for 180 hours and G4 for 220 hours, then G3 will be selected as the calibration frequency number.

[0099] The total air supply for power frequency calibration refers to the total volume of compressed air actually output by all operating power frequency air compressors per unit time after replacing the air compressor in the power frequency working group with the power frequency air compressor corresponding to the calibration power frequency number during the calibration process. The total air supply for power frequency calibration is obtained by the system monitoring and collecting the total air supply data after the replacement in real time using a flow sensor. For example, when calibration power frequency number G3 replaces G2 in the power frequency working group, the system records the air supply at this time as the total air supply for power frequency calibration.

[0100] Step 19: When the total air supply of the power frequency calibration is equal to the required air supply, the power frequency working number corresponding to the power frequency air compressor to be replaced is defined as the damage number, and the power frequency abnormal signal is output according to the damage number.

[0101] A damage number is a unique identifier for a faulty industrial frequency air compressor in an air compressor station whose actual output air supply is insufficient and cannot meet the rated air supply requirements. When the total industrial frequency calibration air supply is equal to the required air supply, it indicates that the industrial frequency air compressor corresponding to the replaced industrial frequency work number has a fault of insufficient output air supply. Its actual operating air supply is less than the industrial frequency air supply, which is the direct cause of the air compressor station's total air supply failing to meet the required air supply. Therefore, the replaced industrial frequency work number is defined as a damage number.

[0102] The power frequency abnormality signal refers to the warning signal generated by the system based on the damage number, used to alert staff that the power frequency air compressor has malfunctioned. The power frequency abnormality signal can be output via an audible and visual alarm device, emitting a clear alarm sound and flashing lights in the air compressor station control room, while simultaneously displaying the damage number.

[0103] This also includes: Step 20: When the total gas supply is less than the demand gas supply, and the number of power frequency demand is equal to the number of power frequency numbers, obtain the working frequency inverter number.

[0104] The "Working Variable Frequency Number" refers to the unique set of identification numbers corresponding to the currently operating variable frequency air compressors. The "Working Variable Frequency Number" is obtained by the system monitoring and recording the variable frequency numbers corresponding to all variable frequency air compressors in operation in real time. For example, if there are three variable frequency air compressors B1, B2, and B3 in the variable frequency number group, and B1 and B2 are currently running, then the "Working Variable Frequency Numbers" are B1 and B2.

[0105] Step 21: Obtain the remaining frequency converter numbers based on the already working frequency converter numbers and frequency converter number groups.

[0106] The remaining inverter numbers refer to the numbers corresponding to the inverter air compressors that are not in operation within the inverter number group. The remaining inverter numbers are obtained by the system comparing the inverter number group with the already operating inverter numbers, and filtering out the numbers that exist in the inverter number group but are not in the already operating inverter numbers. For example, if the inverter number group is B1, B2, B3, B4, and the already operating inverter numbers are B1 and B2, then the remaining inverter numbers are B3 and B4.

[0107] Step 22: Determine the calibration frequency converter number based on the remaining frequency converter numbers, control the frequency converter air compressor corresponding to the calibration frequency converter number to replace the industrial frequency air compressor in the industrial frequency working group in sequence and adjust it to the maximum frequency converter air supply, and obtain the total frequency converter calibration air supply.

[0108] The calibration inverter number refers to the number selected from the remaining inverter numbers to replace the air compressor in the power frequency work group for calibration. The calibration inverter number is determined by prioritizing the inverter air compressor with the shorter cumulative working time. For example, if the remaining inverter numbers are B3 and B4, where B3 has a cumulative working time of 300 hours and B4 has a cumulative working time of 500 hours, then B3 will be selected as the calibration inverter number.

[0109] The total air supply for frequency converter calibration refers to the total volume of compressed air actually output by all operating air compressors per unit time after the frequency converter corresponding to the calibration frequency converter number replaces the fixed-frequency air compressor in the fixed-frequency working group and the frequency converter air compressor is adjusted to its maximum frequency converter air supply. The total air supply for frequency converter calibration is obtained by the system monitoring and collecting the replaced and adjusted total air supply data in real time through a flow sensor installed on the air supply pipeline. For example, when calibration frequency converter number B3 replaces G1 in the fixed-frequency working group and B3 is adjusted to its maximum frequency converter air supply, the system records the air supply at this time as the total air supply for frequency converter calibration.

[0110] Step 23: When the total air supply of the frequency converter is equal to the required air supply, the working number of the replaced power frequency air compressor is defined as the damage number, and a power frequency abnormality signal is output according to the damage number.

[0111] When the total air supply of the frequency converter is equal to the required air supply, it indicates that the replaced frequency air compressor has a fault where the output air supply is not up to standard. Its actual operating air supply is less than the frequency air supply, which is the direct cause of the air compressor station's total air supply being unable to meet the required air supply. At this time, the frequency work number corresponding to the replaced frequency air compressor is defined as the damage number, and a frequency abnormality signal is output according to the damage number, thereby reminding the staff to repair or replace the faulty frequency air compressor in a timely manner.

[0112] This also includes a control method when the total gas supply for power frequency calibration is not equal to the demand for gas supply, the method comprising: Step 1900: When the total gas supply for power frequency calibration is not equal to the demand for gas supply, and the total gas supply for power frequency is equal to the total gas supply, continue to execute step 18.

[0113] When the total air supply of the power frequency calibration is not equal to the required air supply, and the total air supply of the power frequency is equal to the total air supply, it means that the power frequency air compressor corresponding to the current replacement calibration power frequency number is normal, and step 18 needs to be executed to verify other power frequency air compressors.

[0114] Step 1901: When the total air supply of the power frequency calibration is not equal to the required air supply, and the total air supply of the power frequency is not equal to the total air supply, the power frequency working number corresponding to the power frequency air compressor to be replaced is defined as the damage number.

[0115] When the total air supply of the power frequency calibration is not equal to the demand air supply, and the total air supply of the power frequency is not equal to the total air supply, it indicates that the power frequency air compressor corresponding to the current replacement calibration power frequency number has indeed malfunctioned, but other power frequency air compressors have also malfunctioned.

[0116] Step 1902: Select the recalibrated power frequency number from the remaining power frequency numbers, control the power frequency air compressor corresponding to the recalibrated power frequency number to replace the power frequency air compressor in the power frequency work group in turn, and obtain the total air supply of the power frequency recalibration.

[0117] The recalibration frequency code refers to the code selected from the remaining frequency codes for further calibration and confirmation of faulty air compressors. The selection of the recalibration frequency code still follows the principle of prioritizing air compressors with shorter usage periods. For example, among the remaining frequency codes G5 and G6, G5 has been used for 250 hours and G6 for 300 hours, so G5 is prioritized as the recalibration frequency code.

[0118] The total air supply volume for the power frequency recalibration refers to the total volume of compressed air actually output by all operating power frequency air compressors per unit time after replacing the air compressor in the power frequency working group with the power frequency air compressor corresponding to the recalibration power frequency number during the recalibration process. It is obtained by real-time monitoring and collection of the total air supply volume data after replacement using flow sensors installed on the air supply pipeline. For example, when the recalibration power frequency number G5 replaces an air compressor in the power frequency working group, the system records the air supply volume at this time as the total air supply volume for the power frequency recalibration.

[0119] Step 1903: When the total air supply volume of the power frequency recheck is equal to the required air supply volume, the power frequency working number corresponding to the power frequency air compressor to be replaced is defined as the damage number, and a damage number group is formed based on all damage numbers.

[0120] A damage number group refers to a set of unique identifiers corresponding to all industrial frequency air compressors confirmed to have insufficient output air supply. The damage number group is formed by the system summarizing the damage numbers confirmed each time. For example, if G2, G4, and G6 are damage numbers, then these three numbers are combined into a damage number group.

[0121] When the total air supply volume of the power frequency compressor matches the required air supply volume, it indicates that the replaced power frequency air compressor has indeed malfunctioned, and all other power frequency air compressors are functioning normally except for the confirmed damage number. At this point, in addition to defining the currently replaced power frequency compressor as the damage number, it is also necessary to summarize the damage numbers defined in the previous steps and form a damage number group based on all the damage numbers.

[0122] Step 1904: Output power frequency abnormal signal according to the damage number group.

[0123] The system outputs a power frequency abnormality signal based on all the damage numbers in the damage number group. At the same time, it emits a clear alarm sound and flashing light in the air compressor station control room through the audible and visual alarm device, and displays all the damage numbers in the damage number group.

[0124] This also includes a control method for checking when the calibration power frequency number is missing, the method comprising: Step 19020: If the recalibration power frequency number does not exist, obtain the backup power frequency number.

[0125] The standby power frequency number refers to the number corresponding to the standby power frequency air compressor. The standby power frequency number is obtained by the staff in advance by assigning a unique number to the standby power frequency air compressors configured in the air compressor station, and then entering the numbers of all standby power frequency air compressors into the system, such as R1, R2, etc.

[0126] Step 19021: Control the backup power frequency number corresponding power frequency air compressor to replace the power frequency air compressor in the power frequency work group in sequence, and execute steps 1902 to 1903 until the total power frequency air supply is equal to the required air supply.

[0127] The system controls the backup air compressor corresponding to the backup air compressor number to replace the air compressors in the air compressor work group in turn, and executes steps 1902 to 1903 to continuously check and calibrate the air compressors until all air compressors with insufficient air supply are found.

[0128] This also includes an optimized method for obtaining the required gas supply, which includes: Step 100: Obtain the provisional gas supply demand.

[0129] Provisional demand for compressed air refers to the total amount of compressed air that all air-consuming entities within the air compressor station's supply area are temporarily required under current operating conditions. Provisional demand for compressed air is obtained by collecting the real-time total air consumption of all air-consuming entities within the supply area from flow sensors in the air compressor station's main transmission and distribution network.

[0130] Step 101: When the provisional gas demand falls within the preset reasonable gas demand range, the provisional gas demand is defined as the gas demand.

[0131] The reasonable demand air supply range refers to the range used to determine whether the provisional demand air supply volume conforms to the actual production air consumption pattern. The reasonable demand air supply range can cover the fluctuation range of compressed air demand at all air-consuming ends within the supply area under normal production conditions. The reasonable demand air supply range is preset by staff based on historical operating data and actual operating conditions of the air compressor station. When the provisional demand air supply volume falls within the preset reasonable demand air supply range, it indicates that the provisional demand air supply volume conforms to the actual production air consumption pattern and accurately reflects the true demand for compressed air at all air-consuming ends within the supply area under current operating conditions. Therefore, the provisional demand air supply volume is defined as the demand air supply volume.

[0132] Step 102: When the provisional gas demand does not fall within the preset reasonable gas demand range, output a gas demand abnormality signal.

[0133] An abnormal gas supply demand signal is a signal used to indicate an abnormal gas supply demand value. The output of this signal can be achieved through a display screen or an audible and visual alarm device in the control room.

[0134] Based on the same inventive concept, embodiments of the present invention provide an energy-saving control system for an air compressor station.

[0135] An energy-saving control system for an air compressor station includes: The acquisition module is used to acquire the required gas supply volume, power frequency number group, variable frequency number group, power frequency gas supply volume, and variable frequency gas supply range. A memory for storing a program for an energy-saving control method for an air compressor station; The processor loads and executes programs from memory.

[0136] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0137] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An energy-saving control method for an air compressor station, characterized in that, include: Step 1: Obtain the required gas supply volume, power frequency number group, variable frequency number group, power frequency gas supply volume, and variable frequency gas supply range; Step 2: Calculate the number of gas demand items and the remaining gas supply based on the demand and the mains frequency gas supply. Step 3: Determine the power frequency work number from the power frequency number group according to the number of power frequency requirements, and form a power frequency work group according to the power frequency work number; Step 4: When the remaining gas demand falls within the range of the frequency converter gas supply, determine the frequency converter working number from the frequency converter number group; Step 5: Adjust the variable frequency air compressor corresponding to the variable frequency work number according to the remaining air supply demand to obtain the variable frequency air supply. Step 6: Formulate a gas supply plan based on the power frequency gas supply, variable frequency gas supply, power frequency work group, and variable frequency work group number; Step 7: Control the air compressor station to supply gas according to the gas supply plan.

2. The energy-saving control method for an air compressor station according to claim 1, characterized in that, Also includes: Step 8: When the remaining gas demand does not fall within the range of variable frequency gas supply, determine the maximum and minimum variable frequency gas supply based on the range of variable frequency gas supply. Step 9: When the remaining gas supply demand is less than the minimum frequency converter gas supply, determine the minimum frequency converter working number from the frequency converter number group; Step 10: Adjust the variable frequency air compressor corresponding to the minimum variable frequency working number according to the minimum variable frequency air supply to obtain the minimum variable frequency working air supply. Step 11: Based on the power frequency gas supply, minimum variable frequency gas supply, power frequency work group, and minimum variable frequency work group number, form a minimum gas supply plan and control the air compressor station to supply gas according to the minimum gas supply plan; Step 12: When the remaining gas demand is greater than the maximum variable frequency gas supply, calculate the rated number of variable frequency demands and the variable frequency gas supply margin based on the remaining gas demand and the maximum variable frequency gas supply. Step 13: Determine the rated frequency converter work number and frequency regulation work number from the frequency converter number group according to the number of rated frequency converter requirements; Step 14: Form a rated frequency conversion work group based on the rated frequency conversion work number and the frequency modulation work number, and adjust the frequency conversion air compressor corresponding to the frequency modulation work number according to the frequency conversion air supply margin to obtain the frequency modulation air supply. Step 15: Based on the power frequency gas supply, maximum variable frequency gas supply, frequency regulation gas supply, power frequency working group, rated variable frequency working group, and frequency regulation working group number, form a precise gas supply plan, and control the air compressor station to supply gas according to the precise gas supply plan.

3. The energy-saving control method for an air compressor station according to claim 2, characterized in that, The specific methods for calculating the number of gas demand items and the remaining gas demand based on the demand gas supply and the mains frequency gas supply include: Step 200: Determine the number of power frequency numbers based on the power frequency number group; Step 201: Calculate the total power frequency gas supply based on the number of power frequency numbers and the power frequency gas supply volume; Step 202: When the demand for gas supply is less than the total power frequency gas supply, calculate the minimum number of power frequency demand items based on the demand for gas supply and the power frequency gas supply, and define the minimum number of power frequency demand items as the number of power frequency demand items. Step 203: Calculate the total gas supply based on the minimum number of gas demanded and the gas supply volume, and calculate the remaining gas supply volume based on the demand volume and the total gas supply volume. Step 204: When the demand for gas supply exceeds the total power frequency gas supply, define the number of power frequency numbers as the number of power frequency demands; Step 205: Calculate the remaining gas demand based on the demand and total power frequency gas supply.

4. The energy-saving control method for an air compressor station according to claim 1, characterized in that, It also includes a specific method for determining the power frequency work number from the power frequency numbering group based on the number of power frequency requirements, and forming a power frequency work group based on the power frequency work number. This method includes: Step 300: Find the power frequency number and its corresponding usage duration based on the power frequency number group; Step 301: Sort the power frequency numbers in ascending order according to the usage duration to obtain sorted number groups; Step 302: Select power frequency numbers from the sorted numbering group in sequence according to the number of power frequency requirements as power frequency work numbers, and form power frequency work groups according to the power frequency work numbers.

5. The energy-saving control method for an air compressor station according to claim 2, characterized in that, Also includes: Step 16: After the air compressor station starts supplying air, obtain the total air supply volume; Step 17: When the total gas supply is less than the demand gas supply, and the number of power frequency demand is less than the number of power frequency numbers, obtain the remaining power frequency numbers based on the power frequency working number and the power frequency number group. Step 18: Determine the calibration frequency number based on the remaining frequency numbers, control the frequency air compressor corresponding to the calibration frequency number to replace the frequency air compressors in the frequency work group in sequence, and obtain the total air supply for frequency calibration. Step 19: When the total air supply of the power frequency calibration is equal to the required air supply, the power frequency working number corresponding to the power frequency air compressor to be replaced is defined as the damage number, and the power frequency abnormal signal is output according to the damage number.

6. The energy-saving control method for an air compressor station according to claim 5, characterized in that, Also includes: Step 20: When the total gas supply is less than the demand gas supply, and the number of power frequency demand is equal to the number of power frequency numbers, obtain the working frequency inverter number; Step 21: Obtain the remaining inverter numbers based on the already working inverter numbers and inverter number groups; Step 22: Determine the calibration frequency converter number based on the remaining frequency converter numbers, control the frequency converter air compressor corresponding to the calibration frequency converter number to replace the industrial frequency air compressor in the industrial frequency working group in sequence and adjust it to the maximum frequency converter air supply, and obtain the total air supply for frequency converter calibration; Step 23: When the total air supply of the frequency converter is equal to the required air supply, the working number of the replaced power frequency air compressor is defined as the damage number, and a power frequency abnormality signal is output according to the damage number.

7. The energy-saving control method for an air compressor station according to claim 6, characterized in that, It also includes a control method when the total gas supply for power frequency calibration is not equal to the demand for gas supply, the method comprising: Step 1900: When the total gas supply for power frequency calibration is not equal to the demand gas supply, and the total gas supply for power frequency is equal to the total gas supply, continue to execute step 18; Step 1901: When the total air supply of the power frequency calibration is not equal to the required air supply, and the total air supply of the power frequency is not equal to the total air supply, the power frequency working number corresponding to the power frequency air compressor to be replaced is defined as the damage number. Step 1902: Select the recalibrated power frequency number from the remaining power frequency numbers, control the power frequency air compressor corresponding to the recalibrated power frequency number to replace the power frequency air compressor in the power frequency work group in turn, and obtain the total air supply of the power frequency recalibration. Step 1903: When the total air supply volume of the power frequency recheck is equal to the required air supply volume, the power frequency working number corresponding to the power frequency air compressor to be replaced is defined as the damage number, and a damage number group is formed based on all the damage numbers; Step 1904: Output power frequency abnormality signal according to the damage number group.

8. The energy-saving control method for an air compressor station according to claim 7, characterized in that, It also includes a control method for checking when the calibration power frequency number is missing, the method including: Step 19020: If the recalibration power frequency number does not exist, obtain the backup power frequency number; Step 19021: Control the backup power frequency number corresponding power frequency air compressor to replace the power frequency air compressor in the power frequency work group in sequence, and execute steps 1902 to 1903 until the total power frequency air supply is equal to the required air supply.

9. The energy-saving control method for an air compressor station according to claim 1, characterized in that, It also includes an optimized method for obtaining the required gas supply, which includes: Step 100: Obtain the provisional gas supply demand; Step 101: When the provisional gas demand falls within the preset reasonable gas demand range, the provisional gas demand is defined as the gas demand. Step 102: When the provisional gas demand does not fall within the preset reasonable gas demand range, output a gas demand abnormality signal.

10. An energy-saving control system for an air compressor station, characterized in that, include: The acquisition module is used to acquire the required gas supply volume, power frequency number group, variable frequency number group, power frequency gas supply volume, and variable frequency gas supply range. A memory for storing a program for an energy-saving control method for an air compressor station as described in any one of claims 1 to 9; The processor loads and executes programs from memory.

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