Method for controlling green hydrogen compressor

Abstract

The invention relates to the technical field of compressor control, and particularly discloses a method for controlling a green hydrogen compressor, which comprises the steps of data monitoring and acquisition, basic operation state analysis, mechanical characteristic state analysis, equipment electrical state analysis, sealing lossless state analysis and fault early warning and control optimization. Sealing lossless state coefficients are calculated according to parameters such as dynamic pressure difference, hydrogen dynamic leakage rate, part internal defect area, depth and total crack length at a sealing position and are compared with a reasonable range, so that the states of the compressor in the aspects of sealing performance and part integrity can be accurately judged, the problems of sealing failure and part internal defects can be found in time, and the reliability of the compressor is improved. Treatment such as sealing element replacement can be performed in a targeted manner, and stable operation is guaranteed; and finally, aiming at different conditions of overhigh compression thermal state coefficient, abnormal mechanical acoustic state coefficient and the like, measures of adjusting a pre-cooling device, adjusting the rotating speed of a compressor, adjusting a balance block and the like are respectively adopted, so that faults can be effectively handled, and the correlation coefficient is recovered to be normal.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor control, and in particular to a method for controlling a green hydrogen compressor. Background Art

[0002] At present, the operating status monitoring of green hydrogen compressors mainly relies on the detection of single parameters, such as pressure parameters, temperature parameters and flow parameters. However, it is difficult to fully grasp the operating status of the compressor through only single parameter monitoring, especially in the hydrogen compression process. The mutual influence between various parameters and the comprehensive status inside the machine have an important impact on the performance and safety of the compressor. A single parameter alone cannot accurately and timely predict potential failures of the equipment.

[0003] Existing mechanical condition monitoring technologies focus on single parameter analysis of vibration and noise, and are unable to comprehensively assess the health of various components within the compressor. For example, although the monitoring of vibration amplitude and frequency can reflect the health of the mechanical structure to a certain extent, it fails to cover complex factors such as thermal effects and signal transmission between compressor components, affecting the accuracy of fault diagnosis and early warning. In terms of absorbing and utilizing acoustic parameters, existing monitoring technologies still lack the ability to effectively assess the acoustic emission and noise intensity of compressor components, resulting in a weak early warning mechanism for problems such as stress concentration and thermal fatigue of components, making it difficult to deal with problems in a timely manner before they occur. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a method for controlling a green hydrogen compressor.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A method for controlling a green hydrogen compressor comprises the following steps: Step 1: Data monitoring and acquisition: The operating parameters of the green hydrogen compressor at each monitoring position in each operating period are monitored and acquired in real time by the set data monitoring equipment, so as to obtain the operating parameters of the green hydrogen compressor at each monitoring position in each operating period; Step 2: Basic operation status analysis: used to perform comprehensive calculation and analysis on the pressure parameters, temperature parameters and flow parameters of each monitoring position of the green hydrogen compressor corresponding to each operation period, and obtain the compression thermodynamic state coefficient of each monitoring position of the green hydrogen compressor corresponding to each operation period; Step 3: Mechanical characteristic state analysis: used to comprehensively calculate and analyze the vibration parameters and acoustic parameters of each monitoring position in each operating period of the green hydrogen compressor, and obtain the mechanical acoustic state coefficient of each monitoring position in each operating period of the green hydrogen compressor; Step 4: Equipment electrical status analysis: used to perform comprehensive calculation and analysis on the power parameters and status parameters of each monitoring position in each operating period of the green hydrogen compressor, and obtain the electrical status influence coefficient of each monitoring position in each operating period of the green hydrogen compressor; Step 5: Analysis of the seal lossless state: used to calculate and analyze the seal parameters of each monitoring position in each operating period of the green hydrogen compressor, and obtain the seal lossless state coefficient of each monitoring position in each operating period of the green hydrogen compressor; Step 6: Fault warning and control optimization: It is used to provide corresponding fault warning for the analysis status of each monitoring position in each operating period of the green hydrogen compressor, and adjust and optimize the control parameters of the green hydrogen compressor according to the type of fault warned.

[0006] Furthermore, the operating parameters of the green hydrogen compressor at each monitoring position in each operating period include pressure parameters, temperature parameters, flow parameters, vibration parameters, acoustic parameters, power parameters, state parameters and sealing parameters at each monitoring position in each operating period of the green hydrogen compressor.

[0007] Furthermore, the specific calculation and analysis method of the pressure parameters, temperature parameters and flow parameters of each monitoring position of the green hydrogen compressor corresponding to each operating period is as follows: Obtain the intake pressure and exhaust pressure of each monitoring position of the green hydrogen compressor corresponding to each operating period, which are recorded as PI i and PO i , obtain the intake temperature, exhaust temperature and component temperature of each monitoring position of the green hydrogen compressor corresponding to each operating period, which are recorded as TI i ,TO i and TB i , obtain the intake flow rate and exhaust flow rate of each monitoring position of the green hydrogen compressor corresponding to each operating period, which are recorded as QI i and QO i ; According to the formula Calculate the compression thermodynamic state coefficient YR of the green hydrogen compressor at each monitoring position in each operating period i , where α represents the polynomial index of the compression process.

[0008] Furthermore, by combining the design compression ratio, intake temperature range and component design temperature limit of the green hydrogen compressor, the reasonable range of the compression thermal coefficient under normal working conditions is calculated by means of a theoretical formula, and the compression thermal state coefficient of each monitoring position in each operating period of the green hydrogen compressor is compared with the reasonable range of the compression thermal coefficient. If the compression thermal state coefficient of the green hydrogen compressor in a certain operating period is within a reasonable range, it indicates that the operating state of the compressor in the corresponding operating period is good; otherwise, it indicates that the operating state of the compressor in the corresponding operating period is abnormal.

[0009] Furthermore, the specific analysis method of the vibration parameters and acoustic parameters of each monitoring position in each operating period of the green hydrogen compressor is as follows: Obtain the vibration amplitude and vibration frequency of each monitoring position of the green hydrogen compressor in each operating period, which are denoted as ZF i and ZP i , obtain the noise intensity and sound wave intensity of each monitoring position in each operating period of the green hydrogen compressor, which are recorded as ZS i and SB i ; According to the formula Calculate the mechanical acoustic state coefficient MS of the green hydrogen compressor at each monitoring position in each operating period i , It represents the sum of the noise intensity in the characteristic frequency interval corresponding to the green hydrogen compressor fault from ZP1 to ZP2; wherein, the values ​​of ZP1 and ZP2 are selected according to the characteristic frequency interval corresponding to the historical fault.

[0010] Furthermore, the mechanical acoustic state coefficient of the green hydrogen compressor at each monitoring position in each operating period is compared with the reasonable range of the mechanical acoustic state coefficient. If the mechanical acoustic state coefficient of the green hydrogen compressor at each monitoring position in each operating period is within the reasonable range of the mechanical acoustic state, it means that the compressor is in a good operating state in terms of mechanical structure and component acoustic characteristics; otherwise, it means that there is a mechanical component failure in the compressor.

[0011] Furthermore, the specific calculation and analysis method of the power parameters and state parameters of each monitoring position of the green hydrogen compressor corresponding to each operating period is as follows: Obtain the input power, compression power and motor phase voltage of each monitoring position of the green hydrogen compressor corresponding to each operating period, which are recorded as IP i , CP i and Xu i , obtain the corrosion current of each monitoring position of the green hydrogen compressor corresponding to each operating period, which is recorded as FI i , and at the same time obtain the purity of hydrogen entering the green hydrogen compressor, recorded as HC; According to the formula Calculate the electrical state influence coefficient EC of each monitoring position of the green hydrogen compressor corresponding to each operating period i , EU represents the rated phase voltage of the motor in the green hydrogen compressor.

[0012] Furthermore, the specific calculation and analysis method of the sealing parameters of each monitoring position of the green hydrogen compressor corresponding to each operating period is as follows: The dynamic pressure difference at the seal and the dynamic leakage rate of hydrogen are obtained from the sealing parameters of each monitoring position in each operating period of the green hydrogen compressor, which are recorded as ∆P and RL respectively. i ; At the same time, ultrasonic flaw detection equipment is used to detect the internal defect area of ​​the components of the green hydrogen compressor in each operating period to obtain the defect area, defect depth and total crack length inside the green hydrogen compressor components, which are recorded as QA and i , QH i and QL i ; According to the formula Calculate the seal integrity coefficient SN of the green hydrogen compressor at each monitoring position during each operating period i ; The sealing integrity coefficient of the green hydrogen compressor at each monitoring position in each operating period is compared with the reasonable range of the sealing integrity coefficient. If the sealing integrity coefficient of the green hydrogen compressor at each monitoring position in each operating period is within the reasonable range of the sealing integrity coefficient, it means that the green hydrogen compressor is in good condition in terms of sealing performance and component integrity. Otherwise, it means that there are problems of sealing failure and expansion of internal defects in the green hydrogen compressor components.

[0013] Beneficial effects of the present invention: 1. The present invention calculates the compression thermodynamic state coefficient by comprehensively analyzing the pressure, temperature and flow parameters of each monitoring position in each operating period of the green hydrogen compressor, clarifies the meaning of the intake and exhaust pressures, intake and exhaust temperatures, component temperatures and intake and exhaust flows and obtains the corresponding data, and then calculates the coefficient according to a specific formula. The reasonable range of the coefficient is determined in combination with the compressor design compression ratio, intake temperature range and component design temperature limit. The calculated coefficient is compared with the coefficient to judge the operating state of the compressor, thereby timely discovering abnormal periods, facilitating troubleshooting, analysis and adjustment of control parameters, and ensuring stable operation of the compressor, which is of great significance to the efficient and safe operation of the compressor.

[0014] 2. In the present invention, the mechanical acoustic state coefficient is obtained by comprehensively calculating the vibration amplitude, frequency, noise intensity, sound wave intensity and other parameters. By comparing with the reasonable range, the operating state of the compressor in terms of mechanical structure and component acoustic characteristics can be judged, and mechanical component failures can be discovered in time, which is convenient for troubleshooting, analysis and adjustment of control strategies to ensure stable operation; then the electrical state influence coefficient is obtained by comprehensively calculating the input power, compression power, motor phase voltage, corrosion current and hydrogen purity and other parameters. According to this coefficient and a reasonable range, the electrical-related operating conditions of the compressor can be judged, including power utilization efficiency, component corrosion and hydrogen purity, etc., which helps to discover electrical or chemical problems in advance, optimize control parameters, and improve the reliability, safety and efficiency of compressor operation. Overall, the above analysis steps can more comprehensively ensure the stable and efficient operation of the green hydrogen compressor.

[0015] 3. In the present invention, the seal lossless state coefficient is calculated by the dynamic pressure difference at the seal, the dynamic leakage rate of hydrogen, the internal defect area, depth and total crack length of the component, and compared with the reasonable range, so as to accurately judge the state of the compressor in terms of sealing performance and component integrity, timely discover the seal failure and internal defect problems of the component, and facilitate targeted treatment such as seal replacement to ensure stable operation; finally, for different situations such as the compression thermal state coefficient is too high and the mechanical acoustic state coefficient is abnormal, measures such as adjusting the pre-cooling device, adjusting the compressor speed, adjusting the balancing block, and tightening the components are taken respectively, which can effectively deal with faults, restore the relevant coefficients to normal, and optimize the operating state, thereby comprehensively improving the reliability, stability and safety of the green hydrogen compressor operation, reducing the occurrence of faults and downtime, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a flowchart of a method for controlling a green hydrogen compressor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

[0018] Embodiment 1: like Figure 1 As shown, a method for controlling a green hydrogen compressor comprises the following steps: Step 1: Data monitoring and acquisition: The operating parameters of the green hydrogen compressor at each monitoring position in each operating period are monitored and acquired in real time by the set data monitoring equipment, so as to obtain the operating parameters of the green hydrogen compressor at each monitoring position in each operating period; Among them, the operating parameters of the green hydrogen compressor at each monitoring position in each operating period include pressure parameters, temperature parameters, flow parameters, vibration parameters, acoustic parameters, power parameters, state parameters and sealing parameters at each monitoring position in each operating period of the green hydrogen compressor. The above parameters are monitored and collected through corresponding data monitoring and collection equipment or sensors.

[0019] It should be noted that by monitoring and analyzing the pressure parameters of each monitoring position in each operating period of the green hydrogen compressor, it is possible to quickly determine whether there are any abnormalities in the basic compression function of the green hydrogen compressor, and ensure the stability of the basic operating state of the green hydrogen compressor. After determining that the pressure parameters are within a reasonable range, analyzing the temperature parameters can further deepen the understanding of the energy conversion inside the compressor and the thermal stability of the components; then, on the basis of the relative stability of basic parameters such as pressure and temperature, analyzing the vibration parameters can provide insights into the health of the internal mechanical structure of the green hydrogen compressor, and combining the acoustic parameters to provide a basis for judging the working state of the internal components of the green hydrogen compressor from another perspective; then, through the analysis of the power parameters, the operation of the green hydrogen compressor can be optimized and adjusted based on the energy consumption situation. Finally, by combining the state parameters and sealing parameters of the green hydrogen compressor, the wear and damage of the seals can be accurately detected, and they can be replaced in time, the remaining service life of the components can be comprehensively evaluated, and the component replacement plan can be planned in advance to ensure the long-term and reliable operation of the compressor, fundamentally improve the overall control accuracy of the compressor, and prevent the occurrence of hydrogen leakage, a serious safety problem.

[0020] Step 2: Basic operation status analysis: used to perform comprehensive calculation and analysis on the pressure parameters, temperature parameters and flow parameters of each monitoring position of the green hydrogen compressor corresponding to each operation period, and obtain the compression thermodynamic state coefficient of each monitoring position of the green hydrogen compressor corresponding to each operation period; The specific calculation and analysis method is as follows: The intake pressure and exhaust pressure are obtained from the pressure parameters of each monitoring position in each operating period of the green hydrogen compressor, and the intake pressure and exhaust pressure of each monitoring position in each operating period of the green hydrogen compressor are obtained, and their values ​​are recorded as PI i and PO i , i represents the number of each operating period, i=1,2,…,n, n represents the total number of each operating period; The intake air temperature, exhaust air temperature and component temperature are obtained from the temperature parameters of each monitoring position in each operating period of the green hydrogen compressor, and the intake air temperature, exhaust air temperature and component temperature of each monitoring position in each operating period of the green hydrogen compressor are obtained, and their values ​​are recorded as TI i ,TO i and TB i ; The intake flow rate and exhaust flow rate are obtained from the flow parameters of each monitoring position in each operating period of the green hydrogen compressor, and the intake flow rate and exhaust flow rate of each monitoring position in each operating period of the green hydrogen compressor are obtained, and their values ​​are recorded as QI i and QO i ; It should be noted that the intake pressure and exhaust pressure of the green hydrogen compressor at each monitoring position in each operating period refer to the pressure of hydrogen before it enters the compressor and the pressure of hydrogen at the outlet after it is compressed by the compressor, respectively; The intake temperature, exhaust temperature and component temperature of the green hydrogen compressor at each monitoring position in each operating period respectively refer to the temperature of hydrogen when it enters the compressor, the temperature of hydrogen at the compressor outlet after being compressed, and the temperature and value of each key component of the compressor. For example, the sum of the temperatures of the motor, bearing, cylinder and other components represents the component temperature of the green hydrogen compressor in the corresponding operating period; The intake flow rate and exhaust flow rate at each monitoring position of the green hydrogen compressor in each operating period respectively refer to the hydrogen flow rate entering the compressor and the hydrogen flow rate discharged from the compressor after compression.

[0021] According to the formula Calculate the compression thermodynamic state coefficient YR of the green hydrogen compressor at each monitoring position in each operating period i , where α represents the polynomial index of the compression process; specifically, 1<α<γ, where γ refers to the adiabatic index of hydrogen, and for hydrogen γ≈1.4.

[0022] By combining the design compression ratio, intake temperature range and component design temperature limit of the green hydrogen compressor, the reasonable range of the compression thermal coefficient under normal working conditions is calculated through theoretical formulas, and the compression thermal state coefficient of each monitoring position in each operating period of the green hydrogen compressor is compared with the reasonable range of the compression thermal coefficient. If the compression thermal state coefficient of the green hydrogen compressor corresponding to a certain operating period is within a reasonable range, it means that the operating state of the compressor in the corresponding operating period is good. Otherwise, it means that the operating state of the compressor in the corresponding operating period is abnormal, and further investigation and analysis are needed, and the control parameters of the green hydrogen compressor should be adjusted in time to ensure the stable operation of the green hydrogen compressor.

[0023] In a specific embodiment, the present invention calculates the compression thermal state coefficient by comprehensively analyzing the pressure, temperature, and flow parameters of each monitoring position at each operating time period of the green hydrogen compressor, clarifies the meaning of the intake and exhaust pressures, intake and exhaust temperatures, component temperatures, and intake and exhaust flows, and obtains the corresponding data. Then, the coefficient is calculated according to a specific formula, and a reasonable range of the coefficient is determined in combination with the compressor design compression ratio, intake temperature range, and component design temperature limit. The calculated coefficient is compared with the coefficient to judge the operating state of the compressor, thereby timely discovering abnormal periods, facilitating troubleshooting, analysis, and adjustment of control parameters to ensure stable operation of the compressor, which is of great significance to the efficient and safe operation of the compressor.

[0024] Step 3: Mechanical characteristic state analysis: used to comprehensively calculate and analyze the vibration parameters and acoustic parameters of each monitoring position in each operating period of the green hydrogen compressor, and obtain the mechanical acoustic state coefficient of each monitoring position in each operating period of the green hydrogen compressor; The specific analysis method is as follows: The vibration amplitude and vibration frequency are obtained from the vibration parameters of each monitoring position in each operating period of the green hydrogen compressor, and the vibration amplitude and vibration frequency of each monitoring position in each operating period of the green hydrogen compressor are obtained, and their values ​​are recorded as ZF i and ZP i ; The noise intensity and sound wave intensity are obtained from the acoustic parameters of each monitoring position in each operating period of the green hydrogen compressor, and the noise intensity and sound wave intensity of each monitoring position in each operating period of the green hydrogen compressor are obtained, and their values ​​are recorded as ZS i and SB i ; It should be noted that the vibration amplitude and vibration frequency of the green hydrogen compressor at each monitoring position in each operating period refer to the strength of the vibration of the compressor during operation and the vibration frequency of the compressor during operation respectively; the noise intensity and sound wave intensity of the green hydrogen compressor at each monitoring position in each operating period refer to the noise sound pressure level and the intensity of the acoustic emission signal at different frequencies respectively.

[0025] According to the formula Calculate the mechanical acoustic state coefficient MS of the green hydrogen compressor at each monitoring position in each operating period i , It represents the sum of the noise intensity in the characteristic frequency interval corresponding to the green hydrogen compressor fault from ZP1 to ZP2; wherein, the values ​​of ZP1 and ZP2 are selected according to the characteristic frequency interval corresponding to the historical fault.

[0026] The mechanical acoustic state coefficient of the green hydrogen compressor at each monitoring position in each operating period is compared with the reasonable range of the mechanical acoustic state coefficient. If the mechanical acoustic state coefficient of the green hydrogen compressor at each monitoring position in each operating period is within the reasonable range of the mechanical acoustic state, it means that the compressor is in a good operating state in terms of mechanical structure and component acoustic characteristics; otherwise, it means that there is a mechanical component failure in the compressor, and further investigation and analysis is needed to timely adjust the control strategy of the compressor to ensure its stable operation.

[0027] Step 4: Equipment electrical status analysis: used to perform comprehensive calculation and analysis on the power parameters and status parameters of each monitoring position in each operating period of the green hydrogen compressor, and obtain the electrical status influence coefficient of each monitoring position in each operating period of the green hydrogen compressor; The specific calculation and analysis method is as follows: The input power, compression power and motor phase voltage are obtained from the power parameters of each monitoring position in each operating period of the green hydrogen compressor, and the input power, compression power and motor phase voltage of each monitoring position in each operating period of the green hydrogen compressor are obtained, and their values ​​are recorded as IP i , CP i and Xu i ; The corrosion current is obtained from the state parameters of each monitoring position in each operating period of the green hydrogen compressor, and the corrosion current of each monitoring position in each operating period of the green hydrogen compressor is obtained, which is recorded as FI i , and at the same time obtain the purity of hydrogen entering the green hydrogen compressor, and record its value as HC; It should be noted that the input power and compression power of the green hydrogen compressor at each monitoring position in each operating period refer to the electric power consumed by the motor when the compressor is running and the power used to compress the hydrogen, respectively; the corrosion current of the green hydrogen compressor at each monitoring position in each operating period is monitored in real time through a linear polarization resistance sensor based on the electrochemical polarization principle for data collection.

[0028] According to the formula Calculate the electrical state influence coefficient EC of the green hydrogen compressor at each monitoring position in each operating period i , EU represents the rated phase voltage of the motor in the green hydrogen compressor.

[0029] In a specific embodiment, the present invention obtains the mechanical acoustic state coefficient by comprehensively calculating the vibration amplitude, frequency, noise intensity, sound wave intensity and other parameters, and compares it with the reasonable range, so as to judge the operating state of the compressor in terms of mechanical structure and component acoustic characteristics, timely discover mechanical component failures, and facilitate troubleshooting, analysis and adjustment of control strategies to ensure stable operation; then the electrical state influence coefficient is obtained by comprehensively calculating the input power, compression power, motor phase voltage, corrosion current and hydrogen purity and other parameters, and the electrical related operating conditions of the compressor can be judged based on this coefficient combined with a reasonable range, including power utilization efficiency, component corrosion and hydrogen purity, etc., which helps to discover electrical or chemical problems in advance, optimize control parameters, and improve the reliability, safety and efficiency of compressor operation. Overall, the above analysis steps can more comprehensively ensure the stable and efficient operation of the green hydrogen compressor.

[0030] Step 5: Analysis of the seal lossless state: used to calculate and analyze the seal parameters of each monitoring position in each operating period of the green hydrogen compressor, and obtain the seal lossless state coefficient of each monitoring position in each operating period of the green hydrogen compressor; The specific calculation and analysis method is as follows: The dynamic pressure difference at the seal and the dynamic leakage rate of hydrogen are obtained from the sealing parameters of each monitoring position in each operating period of the green hydrogen compressor, and their values ​​are recorded as ∆P and RL respectively. i ; At the same time, ultrasonic flaw detection equipment is used to detect the internal defect area of ​​the components of the green hydrogen compressor in each operating period to obtain the defect area, defect depth and total crack length inside the green hydrogen compressor components, and their values ​​are recorded as QA i , QH i and QL i ; According to the formula Calculate the seal integrity coefficient SN of the green hydrogen compressor at each monitoring position during each operating period i ; The sealing integrity coefficient of the green hydrogen compressor at each monitoring position in each operating period is compared with the reasonable range of the sealing integrity coefficient. If the sealing integrity coefficient of the green hydrogen compressor at each monitoring position in each operating period is within the reasonable range of the sealing integrity coefficient, it means that the green hydrogen compressor is in good condition in terms of sealing performance and component integrity. Otherwise, it means that there are problems of sealing failure and expansion of internal defects in the green hydrogen compressor components, which require further investigation and analysis, and replacement of seals to ensure the stable operation of the green hydrogen compressor.

[0031] Step 6: Fault warning and control optimization: It is used to provide corresponding fault warning for the analysis status of each monitoring position of the green hydrogen compressor in each operating period, and adjust and optimize the control parameters of the green hydrogen compressor according to the fault type warned; Specifically, when the compression thermal state coefficient of the green hydrogen compressor at each monitoring position in each operating period is too high due to excessively high intake air temperature, the intake air temperature can be lowered by adjusting the precooling device, or the compressor speed can be appropriately adjusted to change the compression ratio, so that the compression thermal state coefficient value can be restored to the normal range; if the mechanical acoustic state coefficient value is abnormal due to vibration problems, the vibration amplitude and abnormal noise can be reduced by adjusting the balancing block, fastening components, etc., so as to optimize the mechanical operation state; In a specific embodiment, the present invention calculates the seal lossless state coefficient by calculating the dynamic pressure difference at the seal, the dynamic leakage rate of hydrogen, the internal defect area, depth and total crack length of the component, and compares it with a reasonable range, so as to accurately judge the state of the compressor in terms of sealing performance and component integrity, timely discover seal failure and internal defect problems of components, and facilitate targeted replacement of seals and other treatments to ensure stable operation; finally, for different situations such as excessive compression thermal state coefficient and abnormal mechanical acoustic state coefficient, measures such as adjusting the precooling device, adjusting the compressor speed, adjusting the balancing block, and tightening the components are taken respectively, which can effectively deal with faults, restore the relevant coefficients to normal, and optimize the operating state, thereby comprehensively improving the reliability, stability and safety of the green hydrogen compressor operation, reducing the occurrence of faults and downtime, and extending the service life of the equipment.

[0032] The above is an explanation of the present invention and should not be considered as a limitation thereof. Although several exemplary embodiments of the present invention have been described, it should be understood by those skilled in the art that many modifications may be made to the exemplary embodiments without departing from the essence and advantages of the present invention, and these modifications should all be included within the scope of protection of the present invention.

Claims

1. A method for controlling a green hydrogen compressor, characterized in that: The following steps are involved: Step 1: Data monitoring and acquisition: The operating parameters of the green hydrogen compressor at each monitoring position in each operating period are monitored and acquired in real time by the set data monitoring equipment, so as to obtain the operating parameters of the green hydrogen compressor at each monitoring position in each operating period; Step 2: Basic operation status analysis: used to perform comprehensive calculation and analysis on the pressure parameters, temperature parameters and flow parameters of each monitoring position of the green hydrogen compressor corresponding to each operation period, and obtain the compression thermodynamic state coefficient of each monitoring position of the green hydrogen compressor corresponding to each operation period; Step 3: Mechanical characteristic state analysis: used to comprehensively calculate and analyze the vibration parameters and acoustic parameters of each monitoring position in each operating period of the green hydrogen compressor, and obtain the mechanical acoustic state coefficient of each monitoring position in each operating period of the green hydrogen compressor; Step 4: Equipment electrical status analysis: used to perform comprehensive calculation and analysis on the power parameters and status parameters of each monitoring position in each operating period of the green hydrogen compressor, and obtain the electrical status influence coefficient of each monitoring position in each operating period of the green hydrogen compressor; Step 5: Analysis of the seal lossless state: used to calculate and analyze the seal parameters of each monitoring position in each operating period of the green hydrogen compressor, and obtain the seal lossless state coefficient of each monitoring position in each operating period of the green hydrogen compressor; Step 6: Fault warning and control optimization: It is used to provide corresponding fault warning for the analysis status of each monitoring position in each operating period of the green hydrogen compressor, and adjust and optimize the control parameters of the green hydrogen compressor according to the type of fault warned.

2. A method for controlling a green hydrogen compressor according to claim 1, characterized in that: The operating parameters of the green hydrogen compressor at each monitoring position in each operating period include pressure parameters, temperature parameters, flow parameters, vibration parameters, acoustic parameters, power parameters, state parameters and sealing parameters at each monitoring position in each operating period of the green hydrogen compressor.

3. A method for controlling a green hydrogen compressor according to claim 1, characterized in that: The specific calculation and analysis method for the pressure parameters, temperature parameters and flow parameters of each monitoring position of the green hydrogen compressor corresponding to each operating period is as follows: Obtain the intake pressure and exhaust pressure of each monitoring position of the green hydrogen compressor corresponding to each operating period, which are recorded as PI i and PO i , obtain the intake temperature, exhaust temperature and component temperature of each monitoring position of the green hydrogen compressor corresponding to each operating period, which are recorded as TI i ,TO i and TB i , obtain the intake flow rate and exhaust flow rate of each monitoring position of the green hydrogen compressor corresponding to each operating period, which are recorded as QI i and QO i ; According to the formula Calculate the compression thermodynamic state coefficient YR of the green hydrogen compressor at each monitoring position in each operating period i , where α represents the polynomial index of the compression process.

4. A method for controlling a green hydrogen compressor according to claim 3, characterized in that: By combining the design compression ratio, intake temperature range and component design temperature limit of the green hydrogen compressor, the reasonable range of the compression thermal coefficient under normal working conditions is calculated through a theoretical formula, and the compression thermal state coefficient of each monitoring position in each operating period of the green hydrogen compressor is compared with the reasonable range of the compression thermal coefficient. If the compression thermal state coefficient of the green hydrogen compressor in a certain operating period is within a reasonable range, it means that the operating state of the compressor in the corresponding operating period is good; otherwise, it means that the operating state of the compressor in the corresponding operating period is abnormal.

5. A method for controlling a green hydrogen compressor according to claim 1, characterized in that: The specific analysis method of the vibration parameters and acoustic parameters of each monitoring position of the green hydrogen compressor corresponding to each operating period is as follows: Obtain the vibration amplitude and vibration frequency of each monitoring position of the green hydrogen compressor in each operating period, which are denoted as ZF i and ZP i , obtain the noise intensity and sound wave intensity of each monitoring position in each operating period of the green hydrogen compressor, which are recorded as ZS i and SB i ; According to the formula Calculate the mechanical acoustic state coefficient MS of the green hydrogen compressor at each monitoring position in each operating period i , It represents the sum of the noise intensity in the characteristic frequency interval corresponding to the green hydrogen compressor fault from ZP1 to ZP2; wherein, the values ​​of ZP1 and ZP2 are selected according to the characteristic frequency interval corresponding to the historical fault.

6. A method for controlling a green hydrogen compressor according to claim 5, characterized in that: Compare the mechanical acoustic state coefficient of the green hydrogen compressor at each monitoring position in each operating period with the reasonable range of the mechanical acoustic state coefficient. If the mechanical acoustic state coefficient of the green hydrogen compressor at each monitoring position in each operating period is within the reasonable range of the mechanical acoustic state, it means that the compressor is in a good operating state in terms of mechanical structure and component acoustic characteristics; Otherwise, it means that there is a mechanical failure in the compressor.

7. A method for controlling a green hydrogen compressor according to claim 1, characterized in that: The specific calculation and analysis method for the power parameters and state parameters of each monitoring position of the green hydrogen compressor corresponding to each operating period is as follows: Obtain the input power, compression power and motor phase voltage of each monitoring position of the green hydrogen compressor corresponding to each operating period, which are recorded as IP i , CP i and Xu i , obtain the corrosion current of each monitoring position of the green hydrogen compressor corresponding to each operating period, which is recorded as FI i , and at the same time obtain the purity of hydrogen entering the green hydrogen compressor, recorded as HC; According to the formula Calculate the electrical state influence coefficient EC of the green hydrogen compressor at each monitoring position in each operating period i , EU represents the rated phase voltage of the motor in the green hydrogen compressor.

8. A method for controlling a green hydrogen compressor according to claim 1, characterized in that: The specific calculation and analysis method for the sealing parameters of each monitoring position of the green hydrogen compressor corresponding to each operating period is as follows: The dynamic pressure difference at the seal and the dynamic leakage rate of hydrogen are obtained from the sealing parameters of each monitoring position in each operating period of the green hydrogen compressor, which are recorded as ∆P and RL respectively. i ; At the same time, ultrasonic flaw detection equipment is used to detect the internal defect area of ​​the components of the green hydrogen compressor in each operating period to obtain the defect area, defect depth and total crack length inside the green hydrogen compressor components, which are recorded as QA and i , QH i and QL i ; According to the formula Calculate the seal integrity coefficient SN of the green hydrogen compressor at each monitoring position during each operating period i ; The sealing integrity coefficient of the green hydrogen compressor at each monitoring position in each operating period is compared with the reasonable range of the sealing integrity coefficient. If the sealing integrity coefficient of the green hydrogen compressor at each monitoring position in each operating period is within the reasonable range of the sealing integrity coefficient, it means that the green hydrogen compressor is in good condition in terms of sealing performance and component integrity. Otherwise, it means that there are problems of sealing failure and expansion of internal defects in the green hydrogen compressor components.

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