New energy and hydrogen production electrolytic cell electric quantity coupling calculation method and system

Abstract

The invention discloses a new energy and hydrogen production electrolytic cell electric quantity coupling measurement and calculation method and system. The new energy and hydrogen production electrolytic cell electric quantity coupling measurement and calculation method comprises the steps that the new energy generating capacity S is obtained; acquiring parameters of a power transmission line; according to the new energy power generation amount S and the parameters of the power transmission line, obtaining new energy power supply amount T after loss of the power transmission line; acquiring parameters of a hydrogen production system; and according to the new energy power supply amount T and the parameters of the hydrogen production system, the input electric quantity value Y of the electrolytic cell is obtained by utilizing preset judgment conditions. According to the technical scheme provided by the invention, real-time coupling calculation is carried out according to the new energy power supply condition and the operation condition of the hydrogen production system, and the optimal electrolytic cell input electric quantity is selected and the electrolytic cell input electric quantity is configured in real time by utilizing various judgment conditions, so that the new energy and the hydrogen production electrolytic cell can be well coupled; the hydrogen production equipment can maintain stable hydrogen supply to the outside, the utilization rate of new energy is increased, and actual chemical requirements are met.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen production from new energy, and in particular to a method and system for measuring the coupling of new energy and the amount of electricity of a hydrogen production electrolyzer. Background Art

[0002] With the continuous development and application of new energy technologies, more and more electricity generated by renewable energy is used to produce hydrogen by electrolysis of water, and electrolyzers are key equipment for producing hydrogen by electrolysis of water. Specifically, new energy (such as solar energy, wind energy, etc.) can convert renewable energy into electrical energy through photovoltaic power generation, wind power generation, etc., and then use this electrical energy to drive electrolyzers to produce hydrogen by electrolysis of water. This method not only achieves efficient utilization of renewable energy, but also reduces the cost of hydrogen production, providing strong support for the development of the hydrogen energy industry.

[0003] However, the amount of electricity provided by renewable energy power generation is often not stable, and it is difficult to continuously provide a stable amount of hydrogen when used for electrolysis of water to produce hydrogen. In practical applications, a certain amount of hydrogen can be stored in a hydrogen storage tank, and it can be released when the amount of hydrogen is insufficient to maintain a stable amount of hydrogen. However, the existing technology lacks a mature and feasible method for calculating the coupling of electricity between new energy and hydrogen electrolyzers. How to configure the amount of electricity input from new energy to the electrolyzer for hydrogen production so that the hydrogen production equipment can maintain a stable amount of hydrogen and maximize the utilization rate of new energy is a problem that needs to be solved urgently. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the current technology, the present invention provides a method for measuring the coupling of new energy and the power of a hydrogen production electrolyzer. According to the power supply situation of the new energy and the operating conditions of the hydrogen production system, real-time coupling calculation is performed, and the input power of the electrolyzer is configured in real time, so that the hydrogen production equipment can maintain a stable amount of hydrogen to the outside.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0006] A method for measuring the coupling of new energy and hydrogen production electrolyzer power, comprising the following steps:

[0007] Obtain the renewable energy power generation S;

[0008] Obtaining the parameters of the power transmission line;

[0009] According to the renewable energy power generation S and the parameters of the transmission line, the renewable energy power supply T after the transmission line loss is obtained;

[0010] Obtaining parameters of the hydrogen production system;

[0011] According to the new energy power supply T and the parameters of the hydrogen production system, the electrolyzer input power value Y is obtained using the preset judgment conditions.

[0012] According to one aspect of the present invention, obtaining the amount of electricity S generated by renewable energy includes:

[0013] Obtain historical power generation data of new energy sources;

[0014] Based on the historical power generation data of new energy, obtain the hourly power generation data of new energy throughout the year;

[0015] According to the hourly power generation data of renewable energy throughout the year, the power generation S of renewable energy in a certain hour is obtained.

[0016] According to one aspect of the present invention, obtaining the amount of power supplied by a new energy source T after the power transmission line is lost according to the amount of power generated by a new energy source S and the parameters of the power transmission line includes:

[0017] According to the renewable energy power generation S and the parameters of the transmission line, the power loss △S of the transmission line is obtained by using the power flow calculation formula of the power system;

[0018] Subtract the power loss △S of the transmission line from the renewable energy power generation S to obtain the renewable energy power supply T after the transmission line loss.

[0019] According to one aspect of the present invention, the parameters of the hydrogen production system include: system rated load A, rated hydrogen production load C, peak-shaving hydrogen production load threshold E, equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B, and equivalent amount of hydrogen that can be charged into the hydrogen storage tank D.

[0020] According to one aspect of the present invention, the method of obtaining the electrolyzer input power value Y based on the renewable energy power supply T and the parameters of the hydrogen production system using preset judgment conditions includes:

[0021] The renewable energy power supply T, system rated load A, rated hydrogen production load C, peak-shaving hydrogen production load threshold E, equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B, and equivalent amount of hydrogen that can be charged from the hydrogen storage tank D are calculated and compared. According to different judgment conditions, the electrolyzer input power value Y is set so that the hydrogen production system can maintain a stable amount of hydrogen to the outside.

[0022] According to one aspect of the present invention, the method of obtaining the electrolyzer input power value Y based on the renewable energy power supply T and the parameters of the hydrogen production system using preset judgment conditions includes:

[0023] When the renewable energy power supply T is less than the rated load A of the system, and the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B is greater than or equal to the rated hydrogen production load C, the input power value of the electrolyzer Y is 0;

[0024] When the renewable energy power supply T is less than the rated load A of the system, and the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B is less than the rated hydrogen production load C, the electrolyzer input power value Y = rated hydrogen production load C - the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B.

[0025] According to one aspect of the present invention, the method of obtaining the electrolyzer input power value Y based on the renewable energy power supply T and the parameters of the hydrogen production system using preset judgment conditions further includes:

[0026] When the amount of electricity supplied by new energy T ≥ the rated load of the system A, the amount of electricity supplied by new energy T-the rated load of the system A < the rated hydrogen production load C, and the amount of electricity supplied by new energy T-the rated load of the system A+the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B ≥ the rated hydrogen production load C, then the input power value of the electrolyzer Y = the amount of electricity supplied by new energy T-the rated load of the system A;

[0027] When the renewable energy power supply T ≥ system rated load A, the renewable energy power supply T-system rated load A<rated hydrogen production load C, and the renewable energy power supply T-system rated load A+equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B<rated hydrogen production load C, then the electrolyzer input power value Y=rated hydrogen production load C-equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B.

[0028] According to one aspect of the present invention, the method of obtaining the electrolyzer input power value Y based on the renewable energy power supply T and the parameters of the hydrogen production system using preset judgment conditions further includes:

[0029] When the renewable energy power supply T ≥ system rated load A, renewable energy power supply T-system rated load A ≥ rated hydrogen production load C, renewable energy power supply T-system rated load A-rated hydrogen production load C ≤ equivalent hydrogen storage tank chargeable capacity D, and renewable energy power supply T-system rated load A-rated hydrogen production load C ≤ peak load threshold E of hydrogen production, then the electrolyzer input capacity value Y = renewable energy power supply T-system rated load A;

[0030] When the renewable energy power supply T ≥ system rated load A, the renewable energy power supply T - system rated load A ≥ rated hydrogen production load C, the renewable energy power supply T - system rated load A - rated hydrogen production load C ≤ the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D, and the renewable energy power supply T - system rated load A - rated hydrogen production load C > the peak-shaving hydrogen production load threshold E, then the electrolyzer input power value Y = rated hydrogen production load C + peak-shaving hydrogen production load threshold E.

[0031] According to one aspect of the present invention, the method of obtaining the electrolyzer input power value Y based on the renewable energy power supply T and the parameters of the hydrogen production system using preset judgment conditions further includes:

[0032] When the amount of electricity supplied by new energy T ≥ the rated load of the system A, the amount of electricity supplied by new energy T - the rated load of the system A ≥ the rated hydrogen production load C, the amount of electricity supplied by new energy T - the rated load of the system A - the rated hydrogen production load C > the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D, and the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D ≤ the peak-shaving hydrogen production load threshold E, then the input power value of the electrolyzer Y = the rated hydrogen production load C + the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D;

[0033] When the renewable energy power supply T ≥ system rated load A, the renewable energy power supply T - system rated load A ≥ rated hydrogen production load C, the renewable energy power supply T - system rated load A - rated hydrogen production load C > the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D, and the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D > the peak-shaving hydrogen production load threshold E, then the electrolyzer input power value Y = rated hydrogen production load C + peak-shaving hydrogen production load threshold E.

[0034] A system for measuring the coupling of new energy and hydrogen production electrolyzer power, based on the above-mentioned method for measuring the coupling of new energy and hydrogen production electrolyzer power, comprises:

[0035] Power generation module, used to obtain the power generation S of new energy;

[0036] A power transmission parameter module, used to obtain the parameters of the power transmission line;

[0037] The power supply module is used to obtain the power supply T of the new energy after the power transmission line loss according to the power generation S of the new energy and the parameters of the power transmission line;

[0038] A hydrogen production module is used to obtain the parameters of the hydrogen production system;

[0039] The judgment module is used to obtain the electrolyzer input power value Y according to the new energy power supply T and the parameters of the hydrogen production system using preset judgment conditions.

[0040] Advantages of the present invention:

[0041] The present invention provides a method for measuring the coupling of new energy and hydrogen production electrolyzer power. According to the power supply situation of the new energy and the operating conditions of the hydrogen production system, real-time coupling calculation is performed, and the best electrolyzer input power is selected by using multiple judgment conditions. The electrolyzer input power is configured in real time, so that the new energy and the hydrogen production electrolyzer can be better coupled, and the hydrogen production equipment can maintain a stable amount of hydrogen to the outside, thereby improving the utilization rate of new energy and meeting the actual needs of the chemical industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 This is a flow chart of a method for measuring the coupling of new energy and electric quantity of a hydrogen production electrolyzer according to the present invention;

[0044] Figure 2 This is a flow chart of setting the electrolytic cell input power value Y according to the judgment condition according to the first embodiment of the present invention;

[0045] Figure 3 This is a flow chart of setting the electrolytic cell input power value Y according to the judgment conditions described in the second embodiment of the present invention. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Embodiment 1

[0048] like Figure 1 As shown, a method for measuring the coupling of new energy and the amount of electricity of a hydrogen production electrolyzer comprises the following steps:

[0049] S1: Get the power generation S of new energy.

[0050] Step S1 includes:

[0051] Obtain historical power generation data of new energy sources;

[0052] Based on the historical power generation data of new energy, obtain the hourly power generation data of new energy throughout the year;

[0053] According to the hourly power generation data of renewable energy throughout the year, the power generation S of renewable energy in a certain hour is obtained.

[0054] At present, since the power generation of new energy is counted once every hour, the hourly power generation data of new energy throughout the year includes two parts: accurate time (month / day / hour) and corresponding power generation value. If the data can be counted every minute or every second in the future, the time granularity can be reduced to perform coupled calculation of data for each time period.

[0055] In actual applications, the power generation of renewable energy is not fixed in every time period of the year. Therefore, it is necessary to estimate the power generation S of a certain hour based on historical power generation data to calculate the input power value Y of the electrolyzer during that period.

[0056] S2: Obtain the parameters of the power transmission line.

[0057] In practical applications, the parameters of the power transmission line include the impedance value of the power transmission line, the line voltage, etc.

[0058] S3: According to the renewable energy power generation S and the parameters of the transmission line, obtain the renewable energy power supply T after the transmission line loss.

[0059] Step S3 includes:

[0060] According to the renewable energy power generation S and the parameters of the transmission line, the power loss △S of the transmission line is obtained by using the power flow calculation formula of the power system;

[0061] Subtract the power loss △S of the transmission line from the renewable energy power generation S to obtain the renewable energy power supply T after the transmission line loss.

[0062] In practical applications, the power loss △S of the transmission line can be calculated based on the power flow calculation formula using the renewable energy generation S (i.e., line input power), the impedance value of the transmission line (R+jX), and the line voltage U:

[0063]

[0064] After the loss of the power transmission line, the final amount of new energy power supplied to the hydrogen production system is T=S-△S.

[0065] S4: Obtain parameters of the hydrogen production system.

[0066] Step S4 includes: system rated load A, rated hydrogen production load C, peak-shaving hydrogen production load threshold E, equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B, and equivalent amount of hydrogen that can be charged into the hydrogen storage tank D.

[0067] When the hydrogen production system maintains operation, the system needs to consume a certain amount of load electricity, which is the system rated load A.

[0068] When the hydrogen production system maintains stable electrolysis to produce hydrogen, the system needs to consume a certain amount of load electricity, which is the rated hydrogen production load C.

[0069] When the renewable energy power supply can maintain stable hydrogen production by electrolysis and has surplus electricity, more hydrogen can be prepared and stored in hydrogen storage tanks. However, there is a certain upper limit to the amount of hydrogen that can be prepared per unit time, which is the peak-shaving hydrogen production load threshold E.

[0070] When there is hydrogen stored in a hydrogen storage tank that can be released, in actual applications, for the convenience of comparison and measurement, the amount of hydrogen that can be released is generally equated to electrical quantity, that is, the equivalent electrical quantity B of hydrogen that can be released by the hydrogen storage tank.

[0071] When there is more hydrogen to be filled in the hydrogen storage tank, the amount of hydrogen that can be filled is equivalent to electrical quantity, which is the equivalent electrical quantity D that can be filled in the hydrogen storage tank.

[0072] The equivalent amount of hydrogen B that can be discharged from the hydrogen storage tank and the equivalent amount of hydrogen D that can be charged into the hydrogen storage tank both refer to the status of the hydrogen storage tank at the previous moment.

[0073] S5: According to the renewable energy power supply T and the parameters of the hydrogen production system, the electrolyzer input power value Y is obtained using the preset judgment conditions.

[0074] Step S5 includes:

[0075] The renewable energy power supply T, system rated load A, rated hydrogen production load C, peak-shaving hydrogen production load threshold E, equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B, and equivalent amount of hydrogen that can be charged from the hydrogen storage tank D are calculated and compared. According to different judgment conditions, the electrolyzer input power value Y is set so that the hydrogen production system can maintain a stable amount of hydrogen to the outside.

[0076] Among them, the electrolyzer input power value Y represents the power input from new energy power supply to the electrolyzer for hydrogen production, and does not include the system rated load A.

[0077] In practical applications, such as Figure 2 As shown, one of the judgment conditions can be set as:

[0078] When the renewable energy power supply T is less than the system rated load A, the renewable energy power supply is insufficient to supply the hydrogen production system with enough hydrogen to maintain a stable supply of hydrogen. Therefore, the hydrogen storage tank needs to release hydrogen to maintain the supply.

[0079] (1) When the renewable energy power supply T is less than the rated load A of the system, and the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B is greater than or equal to the rated hydrogen production load C, the input power value of the electrolyzer Y is 0.

[0080] When the amount of hydrogen in the hydrogen storage tank is completely sufficient, the hydrogen can be completely released from the hydrogen storage tank to the outside, and there is no need for electrolysis in the electrolyzer to produce hydrogen. Therefore, the input power value Y of the electrolyzer can be 0.

[0081] (2) When the renewable energy power supply T is less than the rated load A of the system, and the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B is less than the rated hydrogen production load C, the input power value of the electrolyzer Y is equal to the rated hydrogen production load C-the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B.

[0082] When the amount of hydrogen in the hydrogen storage tank is not enough to maintain a stable supply of hydrogen to the outside, an electrolyzer is needed to prepare a certain amount of hydrogen.

[0083] from Figure 2 The comparison and judgment conditions can be clearly seen in the table. You can make a judgment directly based on the above judgment conditions, or Figure 2 It can judge the process steps in the process, complete real-time coupling calculation, calculate the amount of electricity that should be input to the electrolyzer, and adjust the power supply value of the electrolyzer provided by new energy in real time.

[0084] The beneficial effect of this embodiment is that this method performs real-time coupling calculation according to the power supply situation of the new energy and the operating conditions of the hydrogen production system, and configures the input power of the electrolyzer in real time, so that the new energy and the hydrogen production electrolyzer can be better coupled, so that the hydrogen production equipment can maintain a stable amount of hydrogen to the outside, improve the utilization rate of new energy, and meet the actual needs of the chemical industry.

[0085] Embodiment 2

[0086] like Figure 1 As shown, a method for measuring the coupling of new energy and the amount of electricity of a hydrogen production electrolyzer comprises the following steps:

[0087] S1: Get the power generation S of new energy.

[0088] Step S1 includes:

[0089] Obtain historical power generation data of new energy sources;

[0090] Based on the historical power generation data of new energy, obtain the hourly power generation data of new energy throughout the year;

[0091] According to the hourly power generation data of renewable energy throughout the year, the power generation S of renewable energy in a certain hour is obtained.

[0092] At present, since the power generation of new energy is counted once every hour, the hourly power generation data of new energy throughout the year includes two parts: accurate time (month / day / hour) and corresponding power generation value. If the data can be counted every minute or every second in the future, the time granularity can be reduced to perform coupled calculation of data for each time period.

[0093] In actual applications, the power generation of renewable energy is not fixed in every time period of the year. Therefore, it is necessary to estimate the power generation S of a certain hour based on historical power generation data to calculate the input power value Y of the electrolyzer during that period.

[0094] S2: Obtain the parameters of the power transmission line.

[0095] In practical applications, the parameters of the power transmission line include the impedance value of the power transmission line, the line voltage, etc.

[0096] S3: According to the renewable energy power generation S and the parameters of the transmission line, obtain the renewable energy power supply T after the transmission line loss.

[0097] Step S3 includes:

[0098] According to the renewable energy power generation S and the parameters of the transmission line, the power loss △S of the transmission line is obtained by using the power flow calculation formula of the power system;

[0099] Subtract the power loss △S of the transmission line from the renewable energy power generation S to obtain the renewable energy power supply T after the transmission line loss.

[0100] In practical applications, the power loss △S of the transmission line can be calculated based on the power flow calculation formula using the renewable energy generation S (i.e., line input power), the impedance value of the transmission line (R+jX), and the line voltage U:

[0101]

[0102] After the loss of the power transmission line, the final amount of new energy power supplied to the hydrogen production system is T=S-△S.

[0103] S4: Obtain parameters of the hydrogen production system.

[0104] Step S4 includes: system rated load A, rated hydrogen production load C, peak-shaving hydrogen production load threshold E, equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B, and equivalent amount of hydrogen that can be charged into the hydrogen storage tank D.

[0105] When the hydrogen production system maintains operation, the system needs to consume a certain amount of load electricity, which is the system rated load A.

[0106] When the hydrogen production system maintains stable electrolysis to produce hydrogen, the system needs to consume a certain amount of load electricity, which is the rated hydrogen production load C.

[0107] When the renewable energy power supply can maintain stable hydrogen production by electrolysis and has surplus electricity, more hydrogen can be prepared and stored in hydrogen storage tanks. However, there is a certain upper limit to the amount of hydrogen that can be prepared per unit time, which is the peak-shaving hydrogen production load threshold E.

[0108] When there is hydrogen stored in a hydrogen storage tank that can be released, in actual applications, for the convenience of comparison and measurement, the amount of hydrogen that can be released is generally equated to electrical quantity, that is, the equivalent electrical quantity B of hydrogen that can be released by the hydrogen storage tank.

[0109] When there is more hydrogen to be filled in the hydrogen storage tank, the amount of hydrogen that can be filled is equivalent to electrical quantity, which is the equivalent electrical quantity D that can be filled in the hydrogen storage tank.

[0110] The equivalent amount of hydrogen B that can be discharged from the hydrogen storage tank and the equivalent amount of hydrogen D that can be charged into the hydrogen storage tank both refer to the status of the hydrogen storage tank at the previous moment.

[0111] S5: According to the renewable energy power supply T and the parameters of the hydrogen production system, the electrolyzer input power value Y is obtained using the preset judgment conditions.

[0112] Step S5 includes:

[0113] The renewable energy power supply T, system rated load A, rated hydrogen production load C, peak-shaving hydrogen production load threshold E, equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B, and equivalent amount of hydrogen that can be charged from the hydrogen storage tank D are calculated and compared. According to different judgment conditions, the electrolyzer input power value Y is set so that the hydrogen production system can maintain a stable amount of hydrogen to the outside.

[0114] Among them, the electrolyzer input power value Y represents the power input from new energy power supply to the electrolyzer for hydrogen production, and does not include the system rated load A.

[0115] In practical applications, such as Figure 3 As shown, the judgment condition can be set as:

[0116] 1. When the amount of electricity supplied by new energy T is less than the rated load A of the system, the amount of electricity supplied by new energy is insufficient to supply the hydrogen production system with enough hydrogen to maintain a stable supply of hydrogen. Therefore, the hydrogen storage tank needs to release hydrogen to maintain the supply.

[0117] (1) When the renewable energy power supply T is less than the rated load A of the system, and the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B is greater than or equal to the rated hydrogen production load C, the input power value of the electrolyzer Y is 0.

[0118] When the amount of hydrogen in the hydrogen storage tank is completely sufficient, the hydrogen can be completely released from the hydrogen storage tank to the outside, and there is no need for electrolysis in the electrolyzer to produce hydrogen. Therefore, the input power value Y of the electrolyzer can be 0.

[0119] (2) When the renewable energy power supply T is less than the rated load A of the system, and the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B is less than the rated hydrogen production load C, the input power value of the electrolyzer Y is equal to the rated hydrogen production load C-the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B.

[0120] When the amount of hydrogen in the hydrogen storage tank is not enough to maintain a stable supply of hydrogen to the outside, an electrolyzer is needed to prepare a certain amount of hydrogen.

[0121] 2. When the renewable energy power supply T ≥ system rated load A, and the renewable energy power supply T - system rated load A < rated hydrogen production load C, the system can maintain operation, but the renewable energy power supply is insufficient to provide the rated hydrogen production load C. The system cannot prepare enough hydrogen to maintain a stable supply of hydrogen to the outside world, so the hydrogen storage tank needs to release hydrogen to supplement it.

[0122] (1) When the renewable energy power supply T ≥ the system rated load A, the renewable energy power supply T - the system rated load A < the rated hydrogen production load C, and the renewable energy power supply T - the system rated load A + the equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B ≥ the rated hydrogen production load C, then the electrolyzer input power value Y = renewable energy power supply T - the system rated load A.

[0123] (2) When the renewable energy power supply T ≥ the system rated load A, the renewable energy power supply T - the system rated load A < the rated hydrogen production load C, and the renewable energy power supply T - the system rated load A + the equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B < the rated hydrogen production load C, then the electrolyzer input power value Y = the rated hydrogen production load C - the equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B.

[0124] 3. When the renewable energy power supply T ≥ the system rated load A, and the renewable energy power supply T-the system rated load A ≥ the rated hydrogen production load C, the system can maintain operation, and the renewable energy power supply is sufficient. In addition to providing the rated hydrogen production load C, there is also surplus electricity to produce more hydrogen to be filled into the hydrogen storage tank. However, the amount of electricity used by the system for producing more hydrogen cannot exceed the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D or the preset peak-shaving hydrogen load threshold E.

[0125] (1) When the renewable energy power supply T ≥ system rated load A, renewable energy power supply T - system rated load A ≥ rated hydrogen production load C, renewable energy power supply T - system rated load A - rated hydrogen production load C ≤ the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D, and renewable energy power supply T - system rated load A - rated hydrogen production load C ≤ peak load threshold E for hydrogen production, then the electrolyzer input power value Y = renewable energy power supply T - system rated load A.

[0126] The amount of electricity used by the system for hydrogen production does not exceed the equivalent amount of electricity D that can be charged in the hydrogen storage tank, nor does it exceed the peak-shaving hydrogen production load threshold E. The system power supply, except for the power required to maintain system operation, can be used entirely for hydrogen production.

[0127] (2) When the renewable energy power supply T ≥ system rated load A, the renewable energy power supply T - system rated load A ≥ rated hydrogen production load C, the renewable energy power supply T - system rated load A - rated hydrogen production load C ≤ the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D, and the renewable energy power supply T - system rated load A - rated hydrogen production load C > the peak-shaving hydrogen production load threshold E, then the electrolyzer input power value Y = rated hydrogen production load C + peak-shaving hydrogen production load threshold E.

[0128] When the amount of electricity used by the system for hydrogen production does not exceed the equivalent amount of electricity D that can be charged in the hydrogen storage tank, but exceeds the peak-shaving hydrogen production load threshold E, the amount of hydrogen production can only be limited to the rated hydrogen production load C + the peak-shaving hydrogen production load threshold E.

[0129] (3) When the renewable energy power supply T ≥ the system rated load A, the renewable energy power supply T - the system rated load A ≥ the rated hydrogen production load C, the renewable energy power supply T - the system rated load A - the rated hydrogen production load C > the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D, and the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D ≤ the peak-shaving hydrogen production load threshold E, then the electrolyzer input power value Y = the rated hydrogen production load C + the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D.

[0130] When the amount of electricity used by the system for hydrogen production exceeds the equivalent amount of electricity D that can be charged in the hydrogen storage tank, and the equivalent amount of electricity D that can be charged in the hydrogen storage tank does not exceed the peak-shaving hydrogen production load threshold E, the amount of hydrogen production can only be limited to the rated hydrogen production load C + the equivalent amount of electricity D that can be charged in the hydrogen storage tank.

[0131] (4) When the renewable energy power supply T ≥ system rated load A, renewable energy power supply T - system rated load A ≥ rated hydrogen production load C, renewable energy power supply T - system rated load A - rated hydrogen production load C > the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D, and the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D > the peak-shaving hydrogen production load threshold E, then the electrolyzer input power value Y = rated hydrogen production load C + peak-shaving hydrogen production load threshold E.

[0132] When the amount of electricity used by the system for hydrogen production exceeds the equivalent amount of electricity D that can be charged in the hydrogen storage tank, and the equivalent amount of electricity D that can be charged in the hydrogen storage tank also exceeds the peak-shaving hydrogen production load threshold E, the amount of hydrogen production can only be limited to the rated hydrogen production load C + the peak-shaving hydrogen production load threshold E.

[0133] from Figure 3 The comparison and judgment conditions can be clearly seen in the table. You can make a judgment directly based on the above judgment conditions, or Figure 3 It can judge the process steps in the process, complete real-time coupling calculation, calculate the amount of electricity that should be input to the electrolyzer, and adjust the power supply value of the electrolyzer provided by new energy in real time.

[0134] The beneficial effects of this embodiment are:

[0135] After obtaining the power generation of renewable energy, this method uses the power system's flow calculation formula to remove the damage to the power transmission circuit, and optimizes the previous general calculation of line loss into a specific quantitative analysis. When coupling the power of renewable energy and hydrogen production electrolyzer, the optimal electrolyzer input power is selected based on the renewable energy power supply situation and the operating conditions of the hydrogen production system using a variety of judgment conditions, so that the hydrogen production equipment can maintain a stable amount of hydrogen to the outside, improve the utilization rate of renewable energy, and meet the actual needs of the chemical industry. In the calculation process, the electrolyzer hydrogen production load is divided into the rated hydrogen production load and the peak hydrogen production load, so that the electrolyzer can be matched with the renewable energy power supply to the greatest extent, and the utilization rate of renewable energy can be improved. In the calculation process, the filling and discharge of hydrogen in the hydrogen storage tank are also considered, making the power configuration more flexible and more adaptable.

[0136] Embodiment 3

[0137] A system for measuring the coupling of new energy and hydrogen production electrolyzer power, based on the method for measuring the coupling of new energy and hydrogen production electrolyzer power as described in Embodiment 1 or 2, comprises:

[0138] Power generation module, used to obtain the power generation S of new energy;

[0139] A power transmission parameter module, used to obtain the parameters of the power transmission line;

[0140] The power supply module is used to obtain the power supply T of the new energy after the power transmission line loss according to the power generation S of the new energy and the parameters of the power transmission line;

[0141] A hydrogen production module is used to obtain the parameters of the hydrogen production system;

[0142] The judgment module is used to obtain the electrolyzer input power value Y according to the new energy power supply T and the parameters of the hydrogen production system using preset judgment conditions.

[0143] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for measuring the coupling of new energy and hydrogen production electrolyzer power, characterized in that: The following steps are involved: Obtain the renewable energy power generation S; Obtaining the parameters of the power transmission line; According to the renewable energy power generation S and the parameters of the transmission line, the renewable energy power supply T after the transmission line loss is obtained; Obtaining parameters of the hydrogen production system; According to the new energy power supply T and the parameters of the hydrogen production system, the electrolyzer input power value Y is obtained using the preset judgment conditions.

2. The method for measuring the coupling of new energy and hydrogen production electrolyzer power according to claim 1 is characterized in that: The obtaining of the new energy power generation S comprises: Obtain historical power generation data of new energy sources; Based on the historical power generation data of new energy, obtain the hourly power generation data of new energy throughout the year; According to the hourly power generation data of renewable energy throughout the year, the power generation S of renewable energy in a certain hour is obtained.

3. The method for calculating the coupling between new energy and hydrogen production electrolyzer power according to claim 1, characterized in that: The method of obtaining the amount of power supplied by the renewable energy source T after the power transmission line is lost according to the amount of power generated by the renewable energy source S and the parameters of the power transmission line includes: According to the renewable energy power generation S and the parameters of the transmission line, the power loss △S of the transmission line is obtained by using the power flow calculation formula of the power system; Subtract the power loss △S of the transmission line from the renewable energy power generation S to obtain the renewable energy power supply T after the transmission line loss.

4. The method for calculating the coupling between new energy and hydrogen production electrolyzer power according to claim 1, characterized in that: The parameters of the hydrogen production system include: system rated load A, rated hydrogen production load C, peak-shaving hydrogen production load threshold E, equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B, and equivalent amount of hydrogen that can be charged into the hydrogen storage tank D.

5. The method for measuring the coupling of new energy and hydrogen production electrolyzer power according to claim 4 is characterized in that: The method of obtaining the electrolyzer input power value Y based on the new energy power supply T and the parameters of the hydrogen production system and using the preset judgment conditions includes: The renewable energy power supply T, system rated load A, rated hydrogen production load C, peak-shaving hydrogen production load threshold E, equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B, and equivalent amount of hydrogen that can be charged from the hydrogen storage tank D are calculated and compared. According to different judgment conditions, the electrolyzer input power value Y is set so that the hydrogen production system can maintain a stable amount of hydrogen to the outside.

6. The method for measuring the coupling of new energy and hydrogen production electrolyzer power according to claim 5 is characterized in that: The method of obtaining the electrolyzer input power value Y based on the new energy power supply T and the parameters of the hydrogen production system and using the preset judgment conditions includes: When the renewable energy power supply T is less than the rated load A of the system, and the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B is greater than or equal to the rated hydrogen production load C, the input power value of the electrolyzer Y is 0; When the renewable energy power supply T is less than the rated load A of the system, and the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B is less than the rated hydrogen production load C, the electrolyzer input power value Y = rated hydrogen production load C - the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B.

7. The method for calculating the coupling between new energy and hydrogen production electrolyzer power according to claim 5, characterized in that: The method of obtaining the electrolyzer input power value Y based on the new energy power supply T and the parameters of the hydrogen production system by using the preset judgment conditions also includes: When the amount of electricity supplied by new energy T ≥ the rated load of the system A, the amount of electricity supplied by new energy T-the rated load of the system A < the rated hydrogen production load C, and the amount of electricity supplied by new energy T-the rated load of the system A+the equivalent amount of hydrogen that can be discharged by the hydrogen storage tank B ≥ the rated hydrogen production load C, then the input power value of the electrolyzer Y = the amount of electricity supplied by new energy T-the rated load of the system A; When the renewable energy power supply T ≥ system rated load A, the renewable energy power supply T-system rated load A<rated hydrogen production load C, and the renewable energy power supply T-system rated load A+equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B<rated hydrogen production load C, then the electrolyzer input power value Y=rated hydrogen production load C-equivalent amount of hydrogen that can be discharged from the hydrogen storage tank B.

8. The method for calculating the coupling between new energy and hydrogen production electrolyzer power according to claim 5, characterized in that: The method of obtaining the electrolyzer input power value Y based on the new energy power supply T and the parameters of the hydrogen production system by using the preset judgment conditions also includes: When the renewable energy power supply T ≥ system rated load A, renewable energy power supply T-system rated load A ≥ rated hydrogen production load C, renewable energy power supply T-system rated load A-rated hydrogen production load C ≤ equivalent hydrogen storage tank chargeable capacity D, and renewable energy power supply T-system rated load A-rated hydrogen production load C ≤ peak load threshold E of hydrogen production, then the electrolyzer input capacity value Y = renewable energy power supply T-system rated load A; When the renewable energy power supply T ≥ system rated load A, the renewable energy power supply T - system rated load A ≥ rated hydrogen production load C, the renewable energy power supply T - system rated load A - rated hydrogen production load C ≤ the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D, and the renewable energy power supply T - system rated load A - rated hydrogen production load C > the peak-shaving hydrogen production load threshold E, then the electrolyzer input power value Y = rated hydrogen production load C + peak-shaving hydrogen production load threshold E.

9. The method for calculating the coupling between new energy and hydrogen production electrolyzer power according to claim 5, characterized in that: The method of obtaining the electrolyzer input power value Y based on the new energy power supply T and the parameters of the hydrogen production system by using the preset judgment conditions also includes: When the amount of electricity supplied by new energy T ≥ the rated load of the system A, the amount of electricity supplied by new energy T - the rated load of the system A ≥ the rated hydrogen production load C, the amount of electricity supplied by new energy T - the rated load of the system A - the rated hydrogen production load C > the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D, and the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D ≤ the peak-shaving hydrogen production load threshold E, then the input power value of the electrolyzer Y = the rated hydrogen production load C + the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D; When the renewable energy power supply T ≥ system rated load A, the renewable energy power supply T - system rated load A ≥ rated hydrogen production load C, the renewable energy power supply T - system rated load A - rated hydrogen production load C > the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D, and the equivalent amount of hydrogen that can be charged in the hydrogen storage tank D > the peak-shaving hydrogen production load threshold E, then the electrolyzer input power value Y = rated hydrogen production load C + peak-shaving hydrogen production load threshold E.

10. A new energy and hydrogen production electrolyzer power coupling measurement system, characterized in that: The method for calculating the coupling between new energy and the amount of electricity of a hydrogen production electrolyzer according to any one of claims 1 to 9 comprises: Power generation module, used to obtain the power generation S of new energy; A power transmission parameter module, used to obtain the parameters of the power transmission line; The power supply module is used to obtain the power supply T of the new energy after the power transmission line loss according to the power generation S of the new energy and the parameters of the power transmission line; A hydrogen production module is used to obtain the parameters of the hydrogen production system; The judgment module is used to obtain the electrolyzer input power value Y according to the new energy power supply T and the parameters of the hydrogen production system using preset judgment conditions.

Images